Compliance Report For the Period: July 1, 2020 through December 31, 2020

February 1, 2021

Boston Water and Sewer Commission 980 Harrison Avenue , MA 02119

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Table of Contents

CERTIFICATION ...... 1 Section 1 – Introduction ...... 2 Section 2 – Illicit Discharge Investigations (IDDE) ...... 2 Priority Listing ...... 2 Outfall Monitoring ...... 3 Sub-Catchment Area Investigations ...... 3 Illicit Discharge Removal ...... 4 Summary of Verified Discharges Not Removed Within 60 Days or 90 Days of Verification and Measures Taken to Correct Them ...... 5 Escalation of Enforcement and Scheduling of Repairs ...... 8 Section 3 – Sanitary Sewer Overflows (SSOs) ...... 8 Section 4 – Construction Site Inspection and Enforcement ...... 9 Section 5 – Industrial Facility Inspections and Enforcement ...... 10 Section 6 – Inter-Agency Agreements ...... 11 Section 7 – Public Education & Outreach ...... 12 SSOs ...... 12 Fats, Oils or Grease (FOG) ...... 13 Leaking Laterals ...... 13 Currents Newsletter, Billing Inserts and Brochures ...... 13 Catch Basin Castings ...... 14 Educational Outreach ...... 15 Environmental Events ...... 15 Bill Messages ...... 16 BWSC Website ...... 17 Digital Signage ...... 19 Updates ...... 19 Section 8 – Staffing Plan ...... 19 Section 9 – Supplemental Environmental Project ...... 20 Section 10 – Best Management Practices & GI/LID Summary ...... 21 Section 11 – Compliance with the Consent Decree ...... 22 [ii]

Summary of Compliance ...... 22 Proposed Changes to Remedial Measures Included in Documents as Approved by EPA under the Terms of the Consent Decree ...... 23 Compliance Activities Planned for Next Reporting Period ...... 23 Summary of Noncompliance ...... 24

TABLES

Table 1. Dry Weather Outfall Screening Results Jan. 1, 2020 through December 31, 2020

Table 2. Wet Weather Outfall Screening Results Jan. 1, 2020 through December 31, 2020

Table 3. Sub‐Catchment Area Investigation Status by Manholes

Table 4. Sub‐Catchment Area Investigation Status by Storm Drain

Table 5. Verified Illicit Discharges – Direct Connections

Table 6. Verified Illicit Discharges ‐ Leaking Laterals

Table 7. Sewage Removed by Sub‐Catchment Area

Table 8. Sewage Removed by Sub‐Watershed Area

Table 9. Direct Illicit Connections > 60 Days to Correct – Enforcement Actions and Schedule for Correction

Table 10. Leaking Laterals > 60 Days to Correct ‐ Enforcement Actions and Schedule for Correction

Table 11. Reportable Sanitary Sewer Overflows (SSOs), Combined Sewer Overflows (CSOs) and Building/Private Property Backups During the Reporting Period

Table 12. All SSOs, CSOs and Building/Private Property Backups During the Reporting Period

Table 13. Non‐Reportable Building/Private Property Backups During the Reporting Period

Table 14. BWSC Construction Site Inspections and Enforcement Actions 7/1/20 ‐ 12/31/20

Table 15. List of Construction Sites Inspected 7/1/20 ‐ 12/31/20

Table 16. BWSC Industrial Facility Inspections and Enforcement Actions 7/1/20 ‐ 12/31/20

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Table 17. Industrial Facility Inspection Sites 7/1/20 - 12/31/20

Table 18. BMP GI/LID Summary BWSC / Public Projects - 7/1/20-12/31/20

Table 19. BMP GI/LID Summary Completed Private Projects - 7/1/20-12/31/20

FIGURES

Figure 1. Verified Illicit Discharges and SSO Locations (Paragraph 75(e))

APPENDICES

APPENDIX A: 2021 Revised Priority Ranking APPENDIX B: Public Education & Outreach Materials

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CERTIFICATION

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

______Robert P. Orthman Assistant General Counsel Dated: January 28, 2021

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Section 1 – Introduction

Pursuant to Section IX of the Consent Decree lodged in federal court on August 23, 2012, the Boston Water and Sewer Commission (BWSC) hereby submits this Compliance Report. As agreed by the Parties, the Compliance Reporting Period was modified to run from July 1 to December 31 with a report due on February 1, with the next period running from January 1 to June 30 and the subsequent report due on August 1. Pursuant to the agreed modification, this Compliance Report covers all activities between July 1, 2020 and December 31, 2020. In accordance with approval of the BMP Recommendations Report on October 24, 2018, BWSC added a new BMP & GI/LID Summary Section 10 providing a narrative summary; as well as, Tables 18 and 19 summarizing BMP GI/LID actions taken by both public and private parties during the Compliance Reporting Period.

During this Reporting Period, certain non-emergency operations of the Commission and non- Commission related activities within the City of Boston and Commonwealth of Massachusetts impacting the NPDES permit and Consent Decree were disrupted by the ongoing COVID-19 pandemic. These disruptions have forced some shutdowns of construction site activities, certain inspection activities, reduced staffing to staggered shifts and remote work by Commission employees, and temporarily impacted other contractor and consultant driven activities such as IDDE investigation/removal, CMOM activities, ongoing BMP studies and inspections, industrial facility inspections and other core functions. While the Commission has adhered to safety protocols and workplace guidance provided by the City of Boston, Commonwealth of Massachusetts, OSHA and CDC, certain functions are still interrupted as of the drafting of this report and reflected herein.

As such, in accordance with the ongoing Phased Reopening in the Commonwealth and City of Boston, the Commission has resumed construction site inspections , IDDE investigations and removals, industrial facilities inspections, and other activities where possible with the health and safety of employees and the public at the forefront. The Commission has continued SSO ERP response and reporting as an essential function along with catch basin cleaning, CCTV inspection, and other CMOM-related activities.

Section 2 – Illicit Discharge Investigations (IDDE)

Priority Listing Paragraph 75(a)

The current priority listing for all sub-catchment areas is provided in Appendix A as of January 31, 2021.

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Outfall Monitoring Paragraph 75(a),

Data collected for dry and wet weather outfall screening performed during the Reporting Period are provided in Tables 1 and 2. Field Screening was conducted in accordance with the Screening Protocols outlined in the Commission’s January 31, 2021 Sub-Catchment Prioritization and Schedule for Completion of Investigations.

Table 1 provides all the dry weather screening data collected during the Reporting Period. All of the Commission’s 255 storm drain outfalls (SDOs), interconnections and combined sewer outfalls (CSOs) were screened at least once during dry weather in 2020.

Table 2 provides the wet weather screening data collected during the Reporting Period. In total, 118 of the Commission’s storm drain and CSO outfalls, and interconnections were screened during wet weather. In accordance with the Commission’s Illicit Discharge Detection and Elimination (IDDE) Plan, wet weather screening is conducted at all SDOs, interconnections and CSOs where flow was not observed during dry weather screening or where dry weather sampling did not equal or exceed the IDDE screening thresholds.

Four (4) CSO locations and ten (10) SDO locations identified for wet weather screening during 2020 could not be screened due to restrictions imposed by the COVID-19 pandemic and the lack of suitable weather conditions. Those outfalls will be screened in 2021 as soon as conditions permit.

Sub-Catchment Area Investigations Paragraph 75(b)( i through iv)

The status of the Commission’s sub-catchment area investigations is summarized in Tables 3 and 4. The Commission completed illicit discharge detection and elimination (IDDE) investigations of its entire storm drain system in August 2020, as required by the Consent Decree.

Highlighted in pink in the tables are the sub-catchment areas that were investigated during the CWI1, CWI2, CWI3, and/or CW14 programs. Their level of completion is based on data collected since 2004 (the start of the Citywide Illegal Connection Investigation Phase 1 program). Highlighted in green are the sub-catchment areas that may have had investigations performed prior to 2004; however, those investigations were performed before the Commission’s GIS system was fully developed, and features were not coded to allow calculations of completeness. GIS coding will be applied in those areas as future investigations warrant. It is noted that some sub-catchment areas on the table are shown as being 100-percent complete, although recent field screening results may indicate contamination may still be present. The investigative stages in those areas are considered complete although all identified illicit discharges or sources may not have yet been eliminated. [3]

Table 3 summarizes the sub-catchment area investigations performed to date based on the number of storm drain manholes inspected. The percentage complete by manholes was calculated based on the total number of stormwater manholes and common manholes in the sub-catchment area that were systematically investigated, divided by the total number of stormwater and common manholes in the sub-catchment area. As per the IDDE Plan, the number of manholes that were systematically investigated includes those that were physically inspected as well as those that were inferred to be free of contamination, based on the results of inspections of manholes upstream and downstream, or on dye tests of adjacent buildings.

Table 4 summarizes the sub-catchment area investigations performed to date based on the linear feet of storm drain inspected. The percentage complete by linear footage of pipe was calculated based on the total footage of storm drain pipe in the sub-catchment area that was systemically investigated, divided by the total footage of storm drain pipe in the sub-catchment.

During the next Compliance Reporting Period, the Commission will review Tables 3 and 4 to determine whether they should be revised to reflect ongoing follow-up investigations going forward.

Illicit Discharge Removal Paragraph 75(c)(i-vi)

Tables 5 and 6 provide listings of illicit discharges verified through the end of the Reporting Period and their current status. The tables include those illicit discharges that were verified but uncorrected as of the start of the Reporting Period on July 1, 2020, as well as those that were verified during the Reporting Period of July 1, 2020 to December 31, 2020. The locations of the verified illicit discharges, as required by Paragraph 75(e), are shown on Figure 1, enclosed in a map pocket at the back of the report.

Table 5 lists the verified direct illicit discharges. During this Reporting Period, 10 direct illicit discharges were verified, or were previously verified, of which three (3) were corrected. Of the seven (7) remaining direct illicit connections, one (1) was reportedly corrected following a sewer backup at the address. Due to access restrictions relating to the COVID-19 pandemic, the Commission has been unable to gain access to the premises to perform an inspection to confirm that the repair corrected the illicit discharge. That inspection will be performed within the next Reporting Period. Three (3) direct illicit connections are included in the Commission’s illicit connection correction contract for correction; these will be corrected during the next Reporting Period. Three (3) locations require the owners to correct internal illicit connections. Owners of these addresses were previously notified that they are responsible for correcting the illicit connections. While progressive enforcement continues, the termination of water services for enforcement has been temporarily suspended during this Reporting Period, again due to restrictions imposed by the COVID-19 pandemic. New enforcement notices will be issued by the Commission for these three locations as warranted in the next Reporting Period, and progressive enforcement will be pursued.

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Table 6 lists the verified illicit discharges attributed to sanitary sewer defects -- e.g., leaking (exfiltrating) sewer laterals. Leaking laterals must be repaired by the owner of the property, although the Commission will reimburse owners up to $4,000 for the cost of repairing a verified leaking lateral. Costs borne by the Commission for verifying and correcting the illicit discharges are included in the tables.

During this Reporting Period, six (6) leaking laterals were verified or were previously verified, of which two (2) were repaired. The owners of the four (4) remaining unrepaired leaking laterals have been sent enforcement notices requiring repair of the leaking laterals and progressive enforcement is being pursued.

The cost and volume of sewage removed from storm drains for each illicit discharge corrected or repaired during the Reporting Period are included in Tables 5 and 6 only if the illicit discharge was eliminated, or if the water was shut off during the Reporting Period.

Additional costs borne by property owners for lateral repair work not covered by the $4,000 reimbursement provided by the Commission are not included in the tables since those costs are not typically provided to the Commission.

During this Reporting Period, the Commission’s cost to correct direct illicit connections was $41,098. The Commission’s cost to test laterals to verify that they were leaking was $3,890. The Commission’s cost to reimburse owners for repairing their leaking sewer laterals was $7,950. In total, the Commission’s cost during this Reporting Period to correct or repair illicit discharges was $52,938.

Volumes of sewage removed during the Reporting Period in each sub-catchment and each sub- watershed are provided in Tables 7 and 8, respectively. The cumulative amount of sewage removed from the MS4 during the Reporting Period was 3,678 gallons per day (gpd). The cumulative-to-date under the Consent Decree was 233,881 gpd. This does not take into account sewage removed by the Commission prior to the Consent Decree.

Summary of Verified Discharges Not Removed Within 60 Days or 90 Days of Verification and Measures Taken to Correct Them Paragraph 75(c)(vii & viii)

Tables 9 and 10 summarize the verified illicit discharges that were not removed within 60 days of verification. As indicated in the tables, some of the discharges also exceeded 90 days from verification. The tables describe the reasons as to why the illicit discharges were not repaired within 60 days and enforcement actions taken where applicable. For the most part, delays in correcting illicit connections during this Reporting Period were due to the COVID-19 pandemic restrictions.

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Table 9 lists locations of direct sanitary sewer connections to storm drains. Eight (8) direct illicit connections were outstanding for greater than 60 days, two (2) of which were corrected during this Reporting Period.

Six (6) connections shown on Table 9 remained uncorrected as of the end of the Reporting Period. Of those, three (3) were located in the public way. Those locations have undergone extensive evaluation to establish feasible correction plans for each. The progress on implementing the corrections were impeded by COVID-19 pandemic related restrictions. Those three locations will be corrected during the next Reporting Period under the Commission’s illicit connection correction contract.

Direct Illicit connections in the public way are addressed as follows: Once the Commission has verified that the illicit discharge is a direct connection to a storm drain in the public way, relevant information (dye test report, maps, record plans, etc.) is forwarded to the Commission’s illicit connection repair contractor (currently contract 20-309-015). Collecting this information can take several days. Necessary permits for excavation and construction must be obtained by the Commission and provided to the contractor. Access Permits must be obtained from the City of Boston Public Works and Transportation Departments to perform the CCTV survey of the sewers to identify the location of the illicit connection on the drain line. Once the CCTV survey is complete for a location, additional Access Permits and Street Opening Permits are required by the Public Works Department and Transportation Department to excavate in the public way. If the illicit connection is located on DCR or DOT owned roadways, additional permits are required. The Commission contractor may commence work only after the necessary permits are obtained. Delays in correcting illicit connections in the public way occur for several reasons, including delays on the part of the Public Works or Transportation Departments in issuing permits, uncooperative or non-responding property owners, or difficulty in locating the lateral service connections in the pipes in the public way.

Table 9 lists three (3) locations where the owners are required to make internal corrections. The dates upon which enforcement notices were issued and actions were taken by the Commission to pursue progressive enforcement for these addresses are included in Table 9. Follow-up enforcement for these locations was delayed in 2020, largely due to COVID-19 pandemic related restrictions. During the next Reporting Period new enforcement notices will be issued to the owners of the three outstanding locations on Table 9 that require the owners to correct.

For internal connections, owners usually must contract with a licensed plumber to make the corrections. The plumbing is often located behind finished walls, in crawl spaces, and under basement slabs, meaning that extensive work may be necessary to make the correction. Such work can be expensive for the property owner. Correction of this type of illicit connection is contingent upon the owner’s ability to schedule plumbers, develop a plan of work, schedule with the plumber to perform the work, get the work completed, and finance the cost. The owners of the direct internal illicit connections are notified as follows: once the Commission verifies that an illicit connection must be corrected by the owner of a property, the Commission prepares a letter of enforcement which is mailed to the owner. The letter [6]

directs the owner to contact the Commission within a given time frame (typically 10 days), submit a plan for correction within a designated time period (typically 30 days), and make the correction within a designated time period (typically 60 days). If the owner fails to respond, and/or does not correct the illicit discharge within those time frames, a second notice is issued. The second letter imposes a deadline or schedule for compliance (typically 30 days) and notifies the owners of fine assessments after a certain date for failure to comply. If the owner still fails to respond or does not correct the illicit connection within the timeline or schedule, the Commission may issue a third notice. The third letter imposes a deadline or schedule for compliance (typically 10 days) and notifies the owner of possible fine assessments after a certain date for failure to comply. If the owner still fails to respond or does not correct the illicit connection within the timeline or schedule identified in the third notice, the Commission may issue a “Fifteen Day Notice”, pursuant to Chapter 6, Section 6.3 of the Commission’s Billing, Termination and Appeal regulations for “Termination of Service”.

Under the Fifteen Day Notice, the owner is given 15 days to correct the illicit connection and notify the Commission. If the owner fails to respond to the Fifteen Day Notice and/or fails to correct the illicit discharge, the Commission mails to the owner, and posts on the premises of the illicit connection, a “Final Notice and Demand”. If the owner fails to correct the internal connection after the posting of the Final Notice and Demand, the Commission may issue fines to the owner and terminate water service.

Table 9 also indicates whether a schedule for correction of the direct connection had been previously established, and whether the previous schedule for correction was met. Seven (7) locations previously had schedules established, none of which were met.

Table 10 lists the locations of verified leaking laterals that were outstanding for 60 days or more during the Reporting Period. There were six (6) leaking laterals outstanding for greater than 60 days of which two (2) were corrected.

Sewer laterals are owned by the owner of the property where they are located; therefore, any cost to repair a leaking sewer lateral must be borne by the property owner. The cost to repair a leaking lateral can be substantial, depending on numerous factors including: the length and depth of the lateral; extent of damage to the lateral; physical conditions at the site (such as the presence of ledge); landscaping features such as walls, and accessibility of the laterals. To help defray the costs for repairing laterals, the Commission has a Sewer Lateral Assistance Program, to provide up to $4,000 in financial assistance to owners required to repair their leaking sewer laterals. To be eligible for the reimbursement the owner must obtain three quotes from contractors, sign a waiver, and agree to line or replace the entire leaking lateral.

The owners of the leaking laterals are notified in the same manner as described above for the owners of direct illicit connections. The dates upon which enforcement notices were issued and actions taken by the Commission to pursue enforcement are included in Table 10. For the four outstanding leaking laterals the dates upon which enforcement notices were issued, and actions that were taken by the [7]

Commission are provided in Table 10. Follow-up enforcement for these locations was delayed in 2020, largely due to COVID-19 pandemic related restrictions. Follow-up enforcement and correction of the leaking laterals will be completed in the next Reporting Period.

Table 10 also indicates whether the leaking laterals were listed in the previous report as being outstanding greater than 60 days, and whether the schedule for repair was met. Five (5) locations previously had schedules established, none of which were met.

The reasons for the delays and enforcement actions taken are provided in Table 10. In general, reasons for delays included the following: • Restrictions relating to the COVID-19 pandemic. • Owner resistance/reluctance to accept responsibility for making the repair. • Owner willingness and ability to get quotes from plumbers. • Availability of plumber to schedule and complete work. • Owner lacked financial capability and had to arrange for grants or loans. • Lateral was repaired but still leaked after, or an illegal connection was found.

Escalation of Enforcement and Scheduling of Repairs Paragraph 75(c)(ix & x)

During the Reporting Period, the Commission continued progressive enforcement with properties with direct illicit discharges and leaking laterals. Progressive enforcement summaries and reasons for exceeding the 60 days and 90 days as reasonable for each direct illicit connection and leaking lateral are found in Tables 9 and 10.

Section 3 – Sanitary Sewer Overflows (SSOs) Paragraph 75(d), (i-xii) On September 23, 2012, the Commission implemented an electronic database to facilitate tracking and reporting of Sanitary Sewer Overflows (SSOs), in accordance with Section VII, Part E of the Consent Decree. BWSC instituted a series of training and protocols to ensure proper notification of internal and external parties, immediate response, reporting, and tracking of SSOs, which included the development of an iPad application and SSO Database (Oracle based) that is also linked to the Commission’s work order management system.

A total of 54 SSOs occurred during the Reporting Period; 25 of the SSOs were reportable (including 16 BWSC caused SSO events and 9 Building/Private Property caused reportable backup events). During the Reporting Period there were a total of 29 Building/Private Property backups that were not reportable private events. No dry weather combined sewer overflow events occurred during the reporting period. The locations of SSOs and Building/Private Property backups, as required by Paragraph 75(e), are shown

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on Figure 1 (in a map pocket). All SSO’s occurring during the Reporting Period were reported in accordance with the terms of Section VII, Part E of the Consent Decree.

Table 11 presents a chronological list of the reportable SSO events, CSO events and Building/Private Backups during the Reporting Period, including the information listed in Paragraph 75(d)(i-xii). Table 12 represents a chronological list of all SSO events, CSO events and Building/Private Property Backups during the Reporting Period, including the information listed in Paragraph 75(d)(i-xii). Table 13 represents a chronological list of non-reportable Building/Private Property Backups during the Reporting Period.

Section 4 – Construction Site Inspection and Enforcement Paragraph 75(f) During the previous Reporting Period, the long-time Construction Site Manager left his position in January 2020. His position was immediately posted and advertised both internally and externally. There were no internal candidates interested, but an external candidate was interviewed. The candidate was not selected; however, prior to re-advertising the position the COVID-19 pandemic disrupted construction activities as well as the search for a new candidate. While the Commission anticipates hiring a new Construction Site Manager as soon as possible, the Commission has trained additional staff to perform this work and also temporarily assigned these duties to Engineering staff until the position is permanently filled. Coordination of SWPPP plan review and submission with Site Plan activities and ongoing construction continues.

Due to the COVID-19 pandemic, all construction activities in the City of Boston were halted in March 2020 and only began to resume under new public health mandates and restrictions at the beginning of this Reporting Period. During the next Reporting Period, the Commission will continue: (1) inspection of all active and new Construction Sites; and (2) summary review of SWPPPs by the Commission for Construction Sites with site plans.

Table 14 below shows limited activity during this Reporting Period for the reasons stated above. Table 15 details each construction site inspected by Commission personnel during the Reporting Period.

Table 14. BWSC Construction Site Inspections and Enforcement Actions 7/1/20 - 12/31/20

Number of Routine Inspections Conducted 18

Number of Complaint-Response Inspections Conducted 0 Total Number of Inspections this Reporting Period 18 Enforcement Actions Taken in Response to Violations 1

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Section 5 – Industrial Facility Inspections and Enforcement Paragraph 75(g)

The Commission continued inspections and implementation of its Industrial Facility Stormwater Pollution Prevention Program Plan (IFSPPP) during the Reporting Period. The Commission continued to perform and track inspections in the IFSPPP database of the inventory of known industrial facilities within the City of Boston. During the Reporting Period, Commission personnel conducted all inspections, enforcement and corrective actions. During the Reporting Period, a total number of sixty- two (62) facilities were inspected. During the last Reporting Period, the Commission completed a total of two hundred and twenty eight (228) inspections for the two-year, 2019-2020 cycle, exceeding the necessary 90% inspection requirement. The Commission did not issue any enforcement letters to facilities for water quality violations during the Reporting Period. During the Reporting Period, twenty- five (25) facilities received “Letter 1 – None or Minor Issues”, two (2) facilities received “Letter 2 – Serious Deficiencies at Facility Noted,” and twenty-three (23) facilities received “Letter 3 – No Exposure”, for a total of fifty (50) letters.

As facilities are inspected and reviewed, the Commission activates and deactivates facilities from the list to maintain the active inventory, as required. During the Reporting Period, a total of twelve (12) facilities were inactivated.

The starting inventory for the next two-year, 2021-2022, cycle of all active industrial facilities is one hundred and eighty-seven (187), with no newly added facilities during the Reporting Period. There are a total of seventy-three (73) facilities to inspect this calendar year, of which sixty-four (64) will be inspected during the next Reporting Period.

Table 16 below provides a summary of the Commission’s Industrial Facility Inspections conducted during the Reporting Period, by facility category, description, inspection count by category, total number routine inspections, total number of inspections, and enforcement actions taken. Table 17 provides a list of the Industrial Facility Sites inspected during the Reporting Period.

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Table 16. BWSC Industrial Facility Inspections and Enforcement Actions 7/1/20 - 12/31/20 Count of Facilities by Category Category Description Category Category 1 All facilities subject to 40 CFR Parts 405-471 0 Category 2 Heavy Manufacturing 8 Category 3 Coal and mineral mining and oil / gas exploration 0 Category 4 Hazardous waste treatment, storage, or disposal 0 Category 5 Landfills, land application sites, and open dumps 0 Category 6 Metal scrapyards, salvage yards, and junkyards 0 Category 7 Steam electric power generating plants 0 Category 8 Transportation Facilities 14 Category 9 WWTPs treating domestic sewage (> 1 MGD) 0 Category 11 Light manufacturing 7 TRI Toxic Release Inventory 1 None No Category Description Available 32 N/A Not Regulated by Stormwater Program 0 Total Number of Routine Inspections Conducted 62 Total Number of Complaint - Response Inspections Conducted 62 Total Number of Inspections this Reporting Period 62 Enforcement Actions Taken in Response to Violations 0

Section 6 – Inter-Agency Agreements Paragraph 75(h) As of the close of the Reporting Period on July 31, 2013, the Commission executed Inter-Agency Agreements with the following twelve (12) governmental entities: ▪ Boston Housing Authority ▪ Town of Brookline ▪ Department of Conservation and Recreation ▪ Town of Dedham ▪ Boston Inspectional Services Department ▪ Town of Milton ▪ Boston Parks and Recreation Department ▪ Boston Public Works Department ▪ Boston Redevelopment Authority / Boston Planning and Development Agency

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▪ Economic Development and Industrial Corporation of Boston (EDIC) ▪ Massachusetts Department of Transportation (MassDOT) ▪ City of Newton Copies of the executed agreements were included in the prior September 1, 2013 report. During the February 1, 2017 Compliance Report, the Commission executed a new Memorandum of Agreement with the City of Boston School Department regarding construction of green infrastructure features at five (5) public schools. In addition, the Commission executed Amendment No. 1 with each of the twelve (12) existing inter-agency agreements to extend the term of the agreements through December 31, 2021. A copy of the new School Department Agreement and each amendment was attached as Appendix C with the February 1, 2017 Report. The Commission continues to work with the City of Boston Property and Construction Management Department related to proposed future engineering design and installation of structural best management practices and green infrastructure at Boston City Hall Plaza.

Section 7 – Public Education & Outreach Paragraph 75(i)

SSOs During the reporting period, the Commission distributed brochures and door hangers to customers and residents affected by sanitary sewer overflows. Specifically, it made available “Sewer Backup Cleanup Procedures” and a “Sanitary Sewer Overflow Notice” door hangers. The Commission also maintained the SSO Maps under the Community Outreach section of its website found at: http://www.bwsc.org/COMMUNITY/maps/SSO.asp These maps are consistent with the Commission’s SSO ERP. The target audiences for these materials are residents and owners impacted by SSOs as well as the public accessing the Commission’s website at www.bwsc.org. Finally, the Commission published color advertisements on how to “Report SSOs” in the following five (5) local newspapers (see sample advertisements in Appendix B): 1. 2. Jamaica Plain Gazette 3. Mattapan Reporter 4. East Boston Times 5. Sampan

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Fats, Oils or Grease (FOG)

During the Reporting Period, the Commission continued to distribute its FOG Prevention brochure and can lids that state “Cool It – Can It – Trash It” to customers requesting them and at public events. During the Reporting Period, a total of 1975 grease can lids were distributed in an attempt to reduce the amount of FOG entering the system. Including FOG materials, during the Reporting Period, the Commission distributed various informational materials (lids, brochures (FOG, SSO, etc..) pamphlets, booklets, etc.) to approximately 2000 people, as shown on a PEOP Materials Tracking Map included in Appendix B.

Leaking Laterals

The Commission also maintained a message regarding its revised Sewer Lateral Program on its website at: http://www.bwsc.org/SERVICES/Programs/sewer_lateral.PDF During the Reporting Period, the Commission maintained a copy of the list of bonded contractors for customers seeking sewer lateral repairs or lining at: http://www.bwsc.org/notices/public_notices/BC_SEWER_LATERAL_ACTIVE_LIST.PDF and bonded contractors for all other repairs at: http://www.bwsc.org/notices/public_notices/BC_ACTIVE_LIST.PDF Customers receiving initial leaking lateral notices during the Reporting Period were made aware that the bonded contractor lists were maintained on the Commission’s website along with information regarding the revised Sewer Lateral Program. The target audience is BWSC customers with existing or potential leaking laterals, and the message emphasizes the importance of the laterals being properly repaired by qualified, bonded contractors.

Currents Newsletter, Billing Inserts and Brochures As mentioned in previous reports, the Commission prepares an informational newsletter called Currents on a bi-monthly basis for its customers. Currents provides useful information about the Commission’s programs and activities, and routinely offers environmental tips to its readers. Currents is also used to announce upcoming events like community outreach meetings and city-sponsored events such as household hazardous waste, oil and paint collections. In addition, Currents offers tips on pollution prevention, and proper disposal of used motor oil, antifreeze, household hazardous materials, yard debris, pet waste and other wastes. Currents is mailed to customers with their monthly water and sewer bills, distributed at neighborhood site locations, and posted on the BWSC website. The Commission also inserts messages about water and sewer management into bills and posts these inserts on its website at www.bwsc.org. Additionally, copies of the inserts are available for pickup at the Commission’s offices. While the Commission’s offices are only open to the public two days per week due to the COVID-19 pandemic, representatives are available five days per week to answer any questions or

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mail this information to customers requesting it. Copies of these newsletters and billing inserts are included in Appendix B. During the reporting period, the Commission promoted the following messages in Currents, on billing inserts and brochures: 1. July/August 2020 Currents: Don’t Dump, Protect Our Waterways Tips on Outdoor Water Conservation Virtual Community Education – Learn what can and can’t be flushed down the toilet or put into storm drains. 2. August 2020 Bill Insert: Important Information about Lead in Drinking Water 3. September/October 2020 Currents: Water Main Flushing Program Schedule Keeping Catch Basins Clear Leaf and Yard Waste Collection Book a Virtual Presentation 4. October 2020 Bill Insert: Backwater Valve Customer Safety Advisory 5. November/December 2020 Currents: What is FOG Sanitary Sewer Overflow Prevention Don’t Forget to Scoop the Poop BWSC Community Outreach – FOG packets distribution to Main Streets 6. December Bill Insert 2020: Important Information about Lead in Drinking Water

Catch Basin Castings Commission contractors are required to install metal castings with a “Don’t Dump” message on sidewalks near new or reconstructed catch basins. City of Boston contractors also install the castings when new sidewalks are installed. The castings are provided to contractors working within the City by the Commission at no cost. The Commission also requires that private developers install permanent “Don’t Dump” catch basin castings next to any new catch basin installed as part of their projects. The developers, as well as other parties interested in obtaining the castings may purchase them from the Commission’s vendor. The Commission issued 462 catch basin castings (252 “Drains to Boston Harbor”, 180 “Drains to Charles River” and 30 “Drains to Neponset River”) to contractors and other parties during the Reporting Period. The Commission continued to work with schools within the City of Boston to mark curbs in their neighborhoods with stencils and decals.

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Educational Outreach

The Commission’s Communications Department employs an Educational Coordinator who gives presentations to City of Boston public and private schools to share information to students regarding water, sewer, and stormwater. During the COVID-19 pandemic, this activity was suspended due to school closures until the transition in October to remote learning. Despite these restrictions and challenges, the Commission made presentations to a total of 261 students and 41 adults, including teachers, seniors, and civic groups. Communications staff continued remote outreach via ZOOM and other remote learning platforms. The list below details presentations given during the reporting period.

• July – 3 groups, 5 adults; 3 schools, 62 students • August– 1 group, 1 adult,1 school, 7 students • September – 2 groups, 4 adults; 1 school, 7 students • October – 2 groups, 31 adults; 2 schools, 176 students • November – No presentations • December- No presentations

A map tracking the distribution of educational materials by neighborhood is included in Appendix B.

Environmental Events

During the Reporting Period, the Commission had limited participation in public events due to restrictions imposed due to the COVID-19 pandemic. Due to social distancing measures, organized public and in-person environmental functions were cancelled. However, we collaborated virtually with our city and other partners such as the Neponset River Watershed and the MWRA Wastewater Advisory Committee (WAC) on awareness campaigns to remind residents about the safety of drinking water, don’t dump or litter (especially used gloves and masks), and to stay home and practice social distancing to reduce the spread of COVID-19. These messages were consistent with the environmental messages that we share on several platforms even when we are not dealing with the challenges that a global pandemic presents.

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Bill Messages

The Commission distributed the following messages with the monthly bills to its customers (target audience is typically owners) to notify them of programs and information that impact the environment during the Reporting Period.

July • Illegal use of hydrants can impede the emergency response of firefighters. Do not open the fire hydrants. Visit www.bwsc.org for more information. • BWSC meters are scheduled to be read daily by an automatic meter reading system. August • Bill Message: Some homes may have elevated lead levels in their drinking water. Lead can pose a significant risk to your health. Please read the enclosed notice and visit www.bwsc.org for further information. Algunas viviendas tienen niveles de plomo muy elevados en su agua potable. El plomo puede ser un riesgo considerable para salud. Les rogamos que lea el aviso para mas informacion. • BWSC meters are scheduled to be read daily by an automatic meter reading system. September • Autumn can be a rainy season. To prevent flooding in your neighborhood, clear leaves, trash, and debris from the top of storm drains. • BWSC meters are scheduled to be read daily by an automatic meter reading system. October • Check your vehicle for leaks. Automotive fluids can enter the storm drain system, contaminate runoff, and pollute local waterways. Visit www.bwsc.org for more information. • BWSC meters are scheduled to be read daily by an automatic meter reading system. November • BWSC’s Customer Services Department will be closed at 5:00 P.M. on Wednesday, November 25, 2020. • BWSC meters are scheduled to be read daily by an automatic meter reading system. December • Please be advised, beginning January 2021, delinquency charges will resume on outstanding balances. If you are experiencing financial difficulties, please contact our Customer Services at (617) 989-7800 for assistance. • BWSC meters are scheduled to be read daily by an automatic meter reading system.

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BWSC Website During this reporting period, the Commission posted important messages on its website, located at www.bwsc.org, regarding flushing water and other appropriate steps to take when reopening a facility after a prolonged closure. We also shared our environmental messages along with public service announcements on the health effects of lead in drinking water by highlighting content in an interactive slideshow at the top of the home page for users to quickly see the information and take action. The Commission has also maintained a Green Infrastructure/Low Impact Development resources page on its website. In addition to the items described above, the Commission’s website provides a variety of information concerning the Commission’s programs, activities, and requirements for BWSC customers and interested parties. Pertinent examples include the Commission’s Sewer Use Regulations and Site Plan Requirements, a page on Stormwater Management with links to past annual stormwater reports, information regarding the Stormwater BMP Guidance Document, BMP Recommendations Report, a description of BWSC’s Downspout Disconnection program, Grease Trap Guidelines; as well as a community outreach and education section including pollution prevention advice for residents, businesses and construction, and pet owners. During the reporting period, the Commission’s website had an average of 85,380 page views per month, an average of 32,118 users per month and an average of 50,721 sessions per month.

Social Media Consistent with the Commission’s Public Education and Outreach Program, the Commission’s social media profiles provide real time information to impacted residents while maintaining its goal to distribute its environmental messages. The Facebook page maintained its reach and Twitter account gained 129 new followers during the Reporting Period. The Commission’s Instagram account gained 83 new followers since the last Reporting Period, creating a total of 942 followers. The Commission also engaged frequently with users on NextDoor, a hyper-local social media platform that allows for direct and proactive communication with residents of activity in specific neighborhoods of the city in real time. Through the Next Door medium, the Commission engaged with 11,679 residents with notices and updates. The following announcements were posted to NextDoor during the reporting period with the number of people each announcement reached: July 9, 2020 PLANNED WATER SERVICE DISRUPTION IN East Boston – 307 people August 5. 2020 PLANNED WATER SERVICE DISRUPTION IN East Boston - 314 August 5, 2020 PLANNED WATER SERVICE DISRUPTION IN Roxbury – 163 August 18, 2020 PLANNED WATER SERVICE DISRUPTION IN Roxbury. – 341 August 25, 2020 PLANNED WATER SERVICE DISRUPTION IN Roxbury. – 157 August 25, 2020 Water Main Flushing in Chinatown, South End and Roxbury – 2518 September 8, 2020 PLANNED WATER SERVICE DISRUPTION IN Jamaica Plain – 457

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September 9, 2020 PLANNED WATER SERVICE DISRUPTION IN Roxbury – 186 September 9, 2020 PLANNED WATER SERVICE DISRUPTION IN Jamaica Plain – 457 September 10, 2020 PLANNED WATER SERVICE DISRUPTION IN Roxbury - 229 September 10, 2020 PLANNED WATER SERVICE DISRUPTION IN North End – 651 September 11, 2020 PLANNED WATER SERVICE DISRUPTION IN Roxbury – 185 September 14, 2020 Planned Water Service Disruption in Roxbury People – 185 September 14, 2020 Planned Water Service Disruption in East Boston - 519 September 14, 2020 Planned Water Service Disruption in Roxbury - 229 September 17, 2020 PLANNED WATER SERVICE DISRUPTION IN Roxbury - 281 October 6, 2020 PLANNED WATER SERVICE DISRUPTION IN West Roxbury 625 October 7, 2020 OVERNIGHT PLANNED WATER SERVICE DISRUPTION – 203 October 8, 2020 PLANNED WATER SERVICE DISRUPTION IN West Roxbury - 626 October 8, 2020 PLANNED WATER SERVICE DISRUPTION IN Roslindale - 1302 October 20, 2020 Planned Water Service Disruption in Jamaica Plain – 1042 October 21, 2020 Planned Water Service Disruption in Roxbury – 84 October 21, 2020 Planned Water Service Disruption in Roxbury – 182 October 27, 2020 BWSC will be tying in the new water main on Walley Street - 436

In coordination with its social media profiles, the Commission also maintains a YouTube channel to host its public service announcements. The following public service announcements were viewed during the reporting period on YouTube: Keep FOG out of the pipes. Fats, Oils, and Grease causes sewer backups - 17,204 Views Scoop the Poop - 4,773 FOG - Fats, Oils, and Grease - 2,660 BWSC's New Website - 1,720 About BWSC - 715 Keep Wipes Out Of Pipes - 690 BWSC’s New Customer Portal – Full Tour 650 BWSC - Where Does the Water Go? - 507 Downspout Disconnection - 247 STAY CONNECTED - 105 BWSC’s New Customer Portal – Quick Tour - 102 Dudley Square Sewer Separation Project Interview - 95 The Water Cycle Is - 81 Water Ways: BWSC Catch Basins - 76 BWSC New CSS Tutorial video - 466 Tastes Great! Less Wasteful! - 74 One Financial Center Installation Video - 50 Boston Tea Party PSA - 35 What's Happening on Boston Harbor? - 28 FOG Plumber (with subtitles) - 27

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Culinary FOG Video - 20 FOG Plumber - 13

Public Service Announcements (PSAs) As previously reported, the Commission does not have publishing data to represent the number of PSAs aired on the Boston Neighborhood Network (BNN). BNN provides two cable access channels reaching three quarters of the Boston households in every neighborhood and demographic group of the City of Boston (188,230 households or 425,400 potential viewers). During this Reporting Period, BNN ran a PSA produced by Culinary Arts students at Madison Park Vocational High School. The message supported the Commission’s Fat’s Oils and Grease (FOG) campaign. The Commission also produced a COVID-19 related video regarding the Safety of Drinking Water during COVID-19 that aired beginning in March. The safety of drinking water was also shared in audio version on a local radio station.

Digital Signage In addition to reaching out to the public, the Commission has made efforts during the Reporting Period to reach its 500 employees through internal digital communications. This tool has helped to promote employee engagement and understanding of the Commission’s environmental messaging, so employees can share what they know with friends and families. During this Reporting Period, messages were provided through digital signage reminding employees of safety protocols related to COVID-19.

Updates The Commission continues tracking public education outreach efforts, upgrading existing materials, and implementing changes to its messages and materials consistent with the PEOP.

Section 8 – Staffing Plan Paragraph 75(j) The Commission submitted a revised, updated Staffing Plan for review to EPA on July 31, 2014. That document contains all the title updates with respect to on-going staffing efforts by the Commission. During the previous Reporting Period the Commission’s contract with Jacobs Engineering for the Citywide 4 IDDE investigation contract ended. During this Reporting Period, a new contract for the Citywide 5 IDDE investigation program was executed with Stantec, Inc. Under the new contract, Stantec will continue IDDE investigations and outfall screening for three (3) years. The Commission continued to engage the resources of Foley Hoag LLP for legal services related to Consent Decree compliance and reporting. The Commission executed two (2) pipeline cleaning and television inspection contracts (20-309-009 and 20-309-010) with Next Level Environmental LLC and National Water Main Cleaning Company during the Reporting Period. These contracts included cleaning and inspection of approximately 60 miles of pipe in 2020 during this Reporting Period and will continue into 2021. The Commission expects to televise

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approximately 90 miles of pipe during 2021 through these two contracts plus television inspection done through other contracts including design and construction work and internal inspections with Commission television trucks. During the Reporting Period, the Commission utilized a contract with Rapid Flow to test laterals to confirm whether they are leaking, and to perform video surveys of sewers and drains relating illicit discharge investigations. That contract was extended during the prior Reporting Period into this Reporting Period. The Commission extended the contract with Nitsch Engineering for GI/LID on-call design and construction oversight services for structural BMPs within the City of Boston for ongoing design projects. Those projects are described in detail in Section 10 of this report below. The Commission filled an open Planner position in the Engineering Planning Department at the end of this Reporting Period, with the new employee beginning work in January 2021. That new employee will assist in tracking for GI/LID projects as part of her responsibilities. The Commission also filled an open Design Engineer position in the Engineering Design Department. That employee will begin work in the next Reporting Period and will assist with GI/LID responsibilities. The Engineering Department continued to advertise for a Project Coordinator – Stormwater Infrastructure to work on Commission GI/LID projects.

During the previous Reporting Period, the long-time Construction Site Manager left his position in January 2020. His position was immediately posted and advertised both internally and externally. There were no internal candidates interested, but an external candidate was interviewed. The candidate was not selected; however, prior to re-advertising the position the COVID-19 pandemic disrupted construction activities as well as the search for a new candidate. While the Commission anticipates hiring a new Construction Site Manager as soon as possible, the Commission has trained additional staff to provide this work and also temporarily assigned these duties to Engineering staff until the position is permanently filled. Coordination of SWPPP plan review and submission with Site Plan activities and ongoing construction continue.

In the Legal Department, the new position of Manager of Enforcement Compliance continued to assist in enforcement and compliance with Consent Decree obligations with a special emphasis on inspections of existing and newly installed BMP/GI structures, in coordination with other Commission departments.

Section 9 – Supplemental Environmental Project Paragraph 75(k) The Commission’s Supplemental Environmental Project (SEP) on lining of leaking laterals was completed on December 11, 2014 with completion of all outstanding field work by T-Tech Consulting, LLC. The Commission filed its SEP Completion Report pursuant to Section VIII, Paragraph 69 on December 23, 2014. That report contains the final SEP Progress Report pursuant to Section VIII, Paragraph 68(a-e). No additional SEP work was performed during the Reporting Period. [20]

Section 10 – Best Management Practices & GI/LID Summary

In accordance with EPA’s approval of the BWSC BMP Recommendation Report on October 24, 2018, the Commission has added this narrative section explaining all actions taken related to BMP / GI / LID work during the Compliance Reporting Period. In addition to this narrative, two (2) tables have been attached summarizing BMP/GI/LID work performed by the Commission or public entities (Table 18) and work performed by private parties (Table 19).

The University of New Hampshire Stormwater Center (UNHSWC) continues post-construction monitoring of Audubon Circle. The objectives of the monitoring include verifying the runoff volume capture, estimating the infiltration rates of the system, and looking for premature bypass of the BMPs in accordance with the BWSC BMP Recommendation Report.

The Commission continued work with the Boston Parks and Recreation Department (BPRD) and Nitsch Engineering to complete the design of Daisy Field for planned implementation of subsurface infiltration in tributary area 18GSDO233 (Daisy Field). Discussions continue regarding managing/treating stormwater on BPRD land.

The Commission continued coordination with the City of Boston on the City Hall Plaza BMP Demonstration Project. During the reporting period, the Commission approved the final design submitted by the City. The construction of City Hall Plaza began during the reporting period. The final design of City Hall Plaza includes the installation of almost 23,000 square feet of permeable pavers and an infiltration reservoir capable of storing approximately 24,434 cubic feet of stormwater. Information regarding the City Hall Plaza project can be found on the City of Boston’s website at the following link: https://www.boston.gov/departments/public-facilities/city-hall-plaza-renovation. Construction will continue for approximately two (2) years.

The Commission continues to work with other city agencies, including Boston Public Works Department (“PWD”), Boston Transportation Department, Boston Planning and Development Agency, and others, to design and construct GI/LID projects at various locations throughout the city.

Ongoing projects in conjunction with the PWD include the design of bioretention BMPs at Codman Square in Dorchester, design of BMPs along Coolidge Road in Brighton, and construction of the bioretention areas along Avenue. During the reporting period, 100% design plans submitted by PWD for Codman Square were approved by the Commission. Construction of the bioretention BMPs at Codman Square is anticipated to begin during the next reporting period.

The Commission also continued work on an on-call design and construction oversight services with Nitsch Engineering, Inc. Under the on-call contract, Nitsch will continue to design GI/LID structural BMPs for collaboration projects with other city agencies within the City of Boston. Ongoing projects with [21]

Nitsch include development of a Green Infrastructure Planning and Design Manual, design of a subsurface gravel filter at Daisy Field (mentioned above), and design of bioretention and subsurface infiltration along Coolidge Road.

Section 11 – Compliance with the Consent Decree Summary of Compliance Paragraphs 75(l)&(n)

The following is a summary of the activities undertaken by the Commission from July 1, 2020 through December 31, 2020 to comply with the terms of the Consent Decree, including plans, reports, and other submissions during the Reporting Period:

1. Certain IDDE investigation work, mainly dye testing, was temporarily suspended during the Reporting Period due to COVID-19 restrictions impeding access to individual homes. However, outfall screening and some manhole inspection continued.

2. Construction Site Inspection and Enforcement Program resumed during the Reporting Period as the Commission committed (temporarily) internal staff to resume Construction Site Inspections and SWPPP plan monitoring during this Reporting Period and will continue to advertise and interview candidates for the Construction Site Manager position.

3. Continued inspections of 90% of all known or suspected industrial facilities and continued inspections of remaining known or suspected industrial facilities through implementation of the Industrial Facility Stormwater Pollution Prevention Program (IFSPPP). The Commission anticipates more IFSPPP inspections during the next Reporting Period due to Phased Reopening and less staffing restrictions due to COVID-19.

4. Maintained the inventory of known industrial facilities within the City of Boston. The inventory will be updated during the next Reporting Period.

5. Maintained its IFSPPP database to track inspections, enforcement, and corrective actions.

6. Submitted Compliance Report to EPA and MassDEP for review and comment as required on August 1, 2020.

7. Maintained its Facebook, Twitter, and other social media accounts, continued PEOP activity tracking, published and aired public service announcements, and other activities listed in Section 7 above.

8. Continued dry weather and wet weather screening of storm drain outfalls, interconnections and combined sewer overflows (CSOs) per Paragraphs 12 and 13.

9. Continued implementation of the PEOP including those activities listed in Section 7 above.

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10. Continued various activities implementing the Commission’s CMOM Corrective Action Plan, including re-organization activities, advertising, and awarding additional contracts (catch basin cleaning, CCTV) and other ongoing work to reach action plan milestones, with some temporary disruptions due to COVID-19 pandemic issues.

11. The Commission executed a contract with Stantec, Inc. for the Citywide 5 IDDE program in August. During the Reporting Period Stantec and its sub-consultant SDE continued to screen outfalls and perform some manhole inspections pursuant to Section VII, Part A and Section VII, Part B, as noted above with some disruptions due to COVID-19.

12. Continued to track and report all public and private SSOs within 24 hours pursuant to Part E and continued implementation of its SSO ERP consistent with Part I.

13. The Commission submitted a revised Sub-Catchment Prioritization Plan to EPA and MassDEP on January 31, 2021.

Proposed Changes to Remedial Measures Included in Documents as Approved by EPA under the Terms of the Consent Decree Paragraph 75(m)

The Commission did not propose any changes to remedial measures during this Reporting Period.

Compliance Activities Planned for Next Reporting Period Paragraph 75(o)

The Commission will continue to implement the BMP Recommendations Report as approved. In addition to the required wet and dry weather outfall screening, the Commission will perform wet weather screening at 14 locations that were identified for wet weather screening during 2020 but could not be screened due to restrictions imposed by the Covid-19 pandemic and the lack of suitable weather conditions. The Commission will continue to perform IDDE investigations and remove illicit discharges pursuant to Section VII, Part C. The Commission continues to implement the CMOM Correction Action Plan and will continue implementation of its Public Education and Outreach Plan. The Commission expects to continue coordination with the City of Boston during the next Reporting Period on the City Hall Plaza BMP Demonstration Project. During the reporting period, the Commission approved the final design submitted by the City and construction of City Hall Plaza began, expected to take two (2) years to complete.

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The Commission will continue coordinating with the Boston Parks Department with respect to implementation of design plans and concepts for a proposed subsurface gravel filter at Daisy Field and continue working with the City of Boston on the GI/LID opportunities listed above. The Commission will also continue to utilize the three (3) year GI/LID on-call contract for public collaborative projects with other City agencies.

Finally, the Commission will continue to implement ongoing remedial measures including outfall screening, construction, and industrial inspections, SSO reporting and notifications and other ongoing programs. The Commission expects full resumption of all Consent Decree related activities including IDDE inspections/removals, construction site inspections, IFSPPP inspections, CMOM activities, BMP/GI related inspections and other activities with the Phased Reopening of the City of Boston and the Commonwealth.

Summary of Noncompliance Paragraph 75(p), (i-iv)

The Commission is not aware of any instances of non-compliance during the Reporting Period for this Compliance Report.

While the Commission is not aware of any instances of non-compliance during the Reporting Period for this Compliance Report, during this Reporting Period, certain non-emergency operations of the Commission and non-Commission related activities within the City of Boston and Commonwealth of Massachusetts impacting the NPDES permit and Consent Decree were disrupted by the ongoing shutdowns related to the COVID-19 pandemic. These restrictions temporarily forced shutdowns of construction site activities, certain inspection activities, reduced staffing to staggered shifts and remote work by Commission employees, and temporarily impacted other contractor and consultant driven activities such as IDDE investigation/removal, CMOM activities, ongoing BMP studies and inspections, industrial facility inspections and other core functions. While the Commission has adhered to safety protocols and workplace guidance provided by the City of Boston, Commonwealth of Massachusetts, OSHA and CDC, certain functions are still interrupted as to the drafting of this report.

As such, in accordance with the ongoing Phased Reopening in the Commonwealth and City of Boston, the Commission has resumed construction site inspections , IDDE investigations and removals, industrial facilities inspections and other activities where possible with the health and safety of employees and the public at the forefront. The Commission continued SSO ERP response and reporting as an essential function throughout the pandemic and has resumed catch basin cleaning, CCTV inspection, and other CMOM related activities.

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TABLE 1. DRY WEATHER SCREENING RESULTS JANUARY 1, 2020 THROUGH DECEMBER 31, 2020 Bar Screen Bacteria If Sediment Depth Water Other Pipe End Bar Screen Head Wall Rip Rap Rip Rap Tide Gate Other Bacteria Inspection Outfall Tidal Outfall Outfall Air Time Since Quantity Time Low Sampling If Flow Other Other Other Deposits Manhole Facility Other Pipe Pipe Other Pipe Needs Needs Pipe End Broken Samples Bacteria Duplicate Facility ID Location Type Weather Is There Flow Submerged Depth plus Sed Odor Color Turbidity Floatables Deposits Pipe Shape Broken Needs Corroded Debris Broken Broken If No Reason Reason No Surfactants Ammonia Chlorine pH Conductivity Temperature Salinity Comments Bacteria Type Duplicate Date Sign Impact Located Accessible Temp F Last Rain Rain24h Tide Location Velocity Odor Color Floatables Stains ID Shape Material Material Repair Cleaning Debris Missing Collected Result Sample Percent percent percent Stains Collapsed Cleared Pit Spall Deposition Missing Missing Sample Sample Result Deter Collect 01ESDO24 SDO 3/18/2020 No No Yes Yes Sunny 41 > 48 hours <0.1 in. Manhole Dry None 50 0 50 None None 1EMH21 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 3 ‐ Maj: advNA NA NA No No Flow 01FSDO31 SDO 3/18/2020 No No No No Sunny 41 > 48 hours <0.1 in. Manhole Dry None 1FMH22 Unknown 0 Other Unknown No No NA NA NA NA NA NA NA NA No No Flow Standing water in outlet. Inlets dry 02ESDO5 SDO 3/12/2020 No No Yes Yes Cloudy 45 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 02FMH120 Interconnection 5/6/2020 Manhole Dry None 0 0 None None 2FMH120 No No Flow N and NW inlets both dry. 02FSDO120 SDO 3/18/2020 No No Yes Yes Sunny 43 > 48 hours <0.1 in. Outfall Flow Moderate 0 5 None Clear Clear None Sediments Yes 1.5 0 0 7.71 2270 11.6 1.4 E.coli 10 No 02FSDO85 SDO 3/18/2020 No No Yes Yes Sunny 43 > 48 hours <0.1 in. Outfall Dry None 0 0 None Round 0 PVC 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA No No Flow 02FSDO93 SDO 3/18/2020 No No No No Sunny 43 > 48 hours <0.1 in. Manhole StandingWater None 100 0 100 2FMH74, 2FMH71 No StandingWater Cannot locate 03ESDO185 SDO 3/12/2020 Yes No Yes Yes Cloudy 45 > 48 hours <0.1 in. Outfall Flow Slow 15 40 None Yellow Clear None Sediments Yes 0.75 0.8 0 7.05 1608 11.1 0.8 E.coli 10 No 03ESDO186 SDO 3/18/2020 No No No No Sunny 45 > 48 hours <0.1 in. Manhole Dry None 3EMH91 No No Flow 03ESDO207 SDO 3/12/2020 Yes No Yes Yes Sunny 37 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 03FMH56 Interconnection 3/18/2020 Manhole Flow Moderate 0 5 None Clear Clear None None 3FMH56 Yes 0.5 0.1 0 8.01 1663 10.6 0.7 E.coli 350 No 04ESDO64 SDO 3/12/2020 No No Yes Yes Sunny 37 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 04ESDO69 SDO 3/12/2020 Yes No Yes Yes Cloudy 37 > 48 hours <0.1 in. Manhole Flow Moderate 75 0 75 None Clear 4EMH67 Round 0 Concrete 0 No No 1 ‐ Min: <1g0 ‐ No 0 ‐ No 2 ‐ Mod: brok0 ‐ No NA NA NA Yes 0.25 0.3 0 7.07 241 10.4 0.1 E.coli 1800 No 04FMH90 Interconnection 3/12/2020 Manhole Flow Slow 10 15 None Clear Clear None Sediments 4FMH90 Yes 1 0.1 0 7.64 6450 8.8 3.5 E.coli 10 No 04FSDO1 SDO 3/12/2020 No No Yes Yes Cloudy 45 > 48 hours <0.1 in. Catch Basin Dry None 15 50 None Clear Clear None None 4FCB136 Round 0 VC 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA No No Flow Continued upstream. 04FSDO118 SDO 3/18/2020 No No Yes Yes Sunny 48 > 48 hours <0.1 in. Outfall Flow Moderate 0 2 None Clear Clear None None Yes 0 0.8 1 8.14 190.5 8.9 0 E.coli 10 No 04FSDO119 SDO 5/6/2020 No No Yes Yes Sunny 51 > 48 hours <0.1 in. Manhole Flow Slow 100 0 100 None None Sediments 3FMH21 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 2 ‐ Mod: ge0 ‐ No 0 ‐ No 0 ‐ No Yes 0 0 0 8.31 1674 13.9 1 E.coli 230 No 04FSDO16 SDO 5/6/2020 No No No No Sunny 54 > 48 hours <0.1 in. Manhole Flow Slow 4FMH210 Yes 0 0 0.6 8.75 256 13.9 0.1 E.coli 10 No 04FSDO189 SDO 5/6/2020 Yes No Yes Yes Sunny 55 > 48 hours <0.1 in. Manhole Dry None 40 0 40 None None 5FMH36 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA No No Flow Proceeded upstream: 5FMH36 is dry. 04FSDO203 SDO 5/6/2020 Yes No Yes Yes Sunny 54 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 04FSDO204 SDO 5/6/2020 No No No No Sunny 54 > 48 hours <0.1 in. Manhole Flow Moderate 4FMH219 Yes 0.25 0 0 8.45 1126 13.7 0.7 Southeast inlet is dry, samE.coli 110 No 05CSDO110 SDO 5/7/2020 No No Yes Yes Sunny 59 > 48 hours <0.1 in. Outfall Flow Moderate 10 15 Musty Clear Clear Garbage Other garbage Yes 1 5 0 8.09 1096 13.6 0.5 E.coli 210 No 05ESDO180 SDO 5/6/2020 Yes No Yes Yes Sunny 55 > 48 hours <0.1 in. Outfall Flow Slow 0 2 None Clear Clear None None Yes 0 0 0 7.96 527 12.9 0.3 E.coli 10 No 05ESDO181 SDO 5/7/2020 Yes No Yes Yes Sunny 64 > 48 hours <0.1 in. Outfall Dry None 100 100 None Sediments No No Flow Outfall buried in sed. US CB dry 05ESDO182 SDO 3/23/2020 Yes No Yes Yes Cloudy 37 > 48 hours <0.1 in. Manhole Flow Slow 50 0 50 None None None 5EMH152 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 0 1.5 9.29 260 6.9 0.1 E.coli 10 No 05ESDO183 SDO 5/7/2020 Yes No Yes Yes Sunny 64 > 48 hours <0.1 in. Outfall Dry None 25 25 None Sediments No No Flow 05ESDO184 SDO 3/23/2020 No No Yes Yes Cloudy 37 > 48 hours <0.1 in. Outfall Flow Slow 0 50 None Clear Clear None None Yes 0 0 0 8.49 1639 6.7 0.8 E.coli 10 No 05FSDO117 SDO 5/6/2020 Yes No Yes Yes Sunny 55 > 48 hours <0.1 in. Outfall Flow Moderate 0 2 None Clear Clear None None Yes 0 0 0 8.57 1428 12.6 0.9 E.coli 20 No 05FSDO244 SDO 5/6/2020 Yes No Yes Yes Sunny 54 > 48 hours <0.1 in. Manhole StandingWater None 95 0 95 None None 4FMH70 Round 0 Metal Researched UNo No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA No StandingWater 05FSDO245 SDO 5/6/2020 Yes No Yes Yes Sunny 55 > 48 hours <0.1 in. Manhole StandingWater None 95 0 95 None None 5FMH210 Round 0 VC 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA No StandingWater 05FSDO253 SDO 3/12/2020 No No No No Cloudy 45 > 48 hours <0.1 in. Manhole Flow Moderate 5FMH289 Yes 0.25 0 0 7.44 1393 10.9 0.7 E.coli 10 No 05FSDO254 SDO 3/12/2020 No No No No Cloudy 45 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 05GSDO112 SDO 5/6/2020 No No No No Sunny 50 > 48 hours <0.1 in. Manhole Dry None 6GMH62 No No Flow 05GSDO115 SDO 5/6/2020 No No Yes Yes Sunny 50 > 48 hours <0.1 in. Outfall Dry None 0 0 None No No Flow 05GSDO116 SDO 5/6/2020 No No Yes Yes Sunny 50 > 48 hours <0.1 in. Outfall Flow Slow 0 0 None Clear Clear None None Yes 0.25 0 0 6.67 2760 11.9 1.4 E.coli 6300 No 05GSDO116A SDO 3/23/2020 Yes No Yes Yes Cloudy 36 > 48 hours <0.1 in. Outfall Flow Slow 0 2 None Clear Clear None None Yes 0 0 0.1 8.48 1790 9.3 0.9 E.coli 10 No 06CMH117 Interconnection 5/6/2020 Manhole Dry None 0 0 None 6CMH117 No No Flow 06DMH97 Interconnection 3/23/2020 Manhole Flow Moderate 0 10 None Clear Clear None Sediments 6DMH97 Yes 0.75 0.8 0 7.77 1600 6.5 0.8 Sample taken at outlet (boE.coli 2700 No 06DSDO184 SDO 5/6/2020 Yes No Yes Yes Sunny 52 > 48 hours <0.1 in. Outfall StandingWater None 10 30 None Clear None No StandingWater No upstream features located. 06DSDO187 SDO 3/23/2020 No No Yes Yes Cloudy 39 > 48 hours <0.1 in. Manhole Flow Moderate 100 0 100 None None 6DMH108 Other Unknown Other Submerged. CNo No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.5 0 0 6.92 1200 10 0.6 E.coli 7700 No 06DSDO57 SDO 3/23/2020 No No No No Cloudy 39 > 48 hours <0.1 in. Manhole Flow Moderate 7DMH137 Yes 0.5 0 0 8.2 1182 6.1 0.6 E.coli 10 No 06DSDO83 SDO 5/6/2020 Yes No Yes Yes Sunny 52 > 48 hours <0.1 in. Manhole Dry None 5 15 None Clear None Sediments 6DMH173 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etcNA NA NA No No Flow 06DSDO84 SDO 5/6/2020 No No No No Sunny 52 > 48 hours <0.1 in. Manhole Dry None 6DMH82 No No Flow 06DSDO85 SDO 5/6/2020 Yes No Yes Yes Sunny 52 > 48 hours <0.1 in. Outfall Dry None 15 15 None No No Flow 06DSDO86 SDO 5/6/2020 No No Yes Yes Sunny 52 > 48 hours <0.1 in. Outfall Submerged None 100 0 100 None Clear None Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etcNA NA NA No Other 100% Submerged Upstream CB is dry 06DSDO91 SDO 5/6/2020 Yes No Yes Yes Sunny 52 > 48 hours <0.1 in. Outfall Submerged None 90 15 90 None Clear Round 0 PVC 0 No No 0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etcNA NA NA No Other Submerged Standing water at US cbs. 06FSDO233 SDO 3/17/2020 No No Yes Yes Cloudy 37 > 48 hours <0.1 in. Outfall Submerged None 50 0 50 None None No Other Submerged CNL us mh. US cb outlets dry 06GSDO108 SDO 3/12/2020 Yes No Yes Yes Sunny 39 > 48 hours <0.1 in. Outfall Flow Slow 0 1 None Clear Clear None Sediments Yes 0 0.1 0 8.06 2720 7.6 1.4 E.coli 10 No 06GSDO109 SDO 3/12/2020 Yes No Yes Yes Sunny 40 > 48 hours <0.1 in. Outfall Flow Slow 0 1 None Clear Clear None None Yes 0.5 5 0.4 8 1303 7.4 0.6 E.coli 6800 No 06GSDO110 SDO 3/12/2020 Yes No Yes Yes Cloudy 40 > 48 hours <0.1 in. Outfall Flow Moderate 0 1 SaltWater Clear Clear None None Yes 0.25 0.2 0 7.88 1372 9.1 0.7 E.coli 25000 No 06GSDO111 SDO 3/12/2020 Yes No Yes Yes Cloudy 40 > 48 hours <0.1 in. Outfall Flow Slow 0 1 None Clear Clear None None Yes 0.25 0 0 8.05 3430 8.5 1.8 E.coli 230 No 06GSDO165 SDO 3/12/2020 Yes No Yes Yes Cloudy 40 > 48 hours <0.1 in. Outfall Flow Slow 0 1 None Clear Clear None Oil Yes 1.5 4 0 8.01 4370 8.5 2.3 E.coli 5800 No 06GSDO166 SDO 3/12/2020 Yes No Yes Yes Cloudy 40 > 48 hours <0.1 in. Outfall Flow Moderate 0 2 None Clear Clear None None Yes 0 0.1 0 8 290 7.7 0.7 E.coli 50 No 06HSDO106 SDO 3/12/2020 No No Yes Yes Cloudy 45 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 06HSDO107 SDO 3/12/2020 No No Yes Yes Cloudy 45 > 48 hours <0.1 in. Outfall Dry None 5 5 No No Flow 07CSDO006 SDO 5/6/2020 Yes No Yes Yes Sunny 55 > 48 hours <0.1 in. Manhole StandingWater None 0 50 None Clear Cloudy None None 7CMH210, 7CMH1Unknown 0 Concrete 0 No No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No No StandingWater 07HSDO105 SDO 3/12/2020 Yes No Yes Yes Cloudy 45 > 48 hours <0.1 in. Outfall Flow Moderate 0 5 Other Sewage Clear Clear Sewage Sediments Yes 0.5 2 0 7.87 864 10.6 0.4 Fecal matter and toilet pa E.coli 5100 No 07HSDO285 SDO 3/17/2020 No No Yes Yes Cloudy 34 > 48 hours <0.1 in. Outfall Flow Heavy 0 5 None Clear Clear None None Yes 0.25 5 0 7.88 1453 10 0.7 E.coli 29000 No 07HSDO346 SDO 3/12/2020 No No Yes Yes Cloudy 45 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 07HSDO347 SDO 3/12/2020 No No Yes Yes Cloudy 40 > 48 hours <0.1 in. Outfall Dry None 0 Other Water No No Flow OF clogged w/trash not hindering flow. Standing water at US MH but dry at OF. 07HSDO348 SDO 3/17/2020 No No Yes Yes Cloudy 36 > 48 hours <0.1 in. Outfall Dry None 90 90 None None No No Flow Outfall 90% full of sediment. US mh 7HMH331 SW inlet dry, NE inlet standing water 08BSDO122 SDO 5/7/2020 Yes No Yes Yes Sunny 55 < 48 hours <0.1 in. Catch Basin StandingWater None 100 0 100 None None None 8BCB46 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA No StandingWater 08BSDO126 SDO 5/7/2020 Yes No Yes Yes Sunny 55 < 48 hours <0.1 in. Manhole Dry None 100 0 100 None None None 8BMH37, 8BMH11Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No No No Flow 08CSDO25 SDO 5/7/2020 No No Yes Yes Sunny 55 < 48 hours <0.1 in. Outfall Flow Slow 5 75 None Clear Clear None None Yes 0 0.5 0 8.27 389 11.8 0.2 E.coli 50 No 08CSDO26 SDO 5/7/2020 No No Yes Yes Sunny 55 < 48 hours <0.1 in. Outfall Flow Slow 5 75 None Clear Clear None None Yes 0.25 0 0 8.47 414 11.9 0.2 E.coli 40 No 08ESDO31 SDO 3/23/2020 Yes No Yes Yes Cloudy 37 > 48 hours <0.1 in. Outfall Flow Moderate 0 15 None Clear Clear None None Yes 0.5 0 0 8.39 1050 6.4 0.5 E.coli 310 No 08ESDO33 SDO 3/23/2020 Yes No Yes Yes Cloudy 37 > 48 hours <0.1 in. Outfall Dry None 0 0 None No No Flow 08ESDO35 SDO 3/23/2020 Yes No Yes Yes Sunny 37 > 48 hours <0.1 in. Outfall Flow Slow 0 1 None Clear Clear None None Yes 0.75 0 0 8.56 6300 5.4 3.3 E.coli 10 No 08FSDO1 SDO 3/17/2020 No No Yes Yes Cloudy 37 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 08ISDO153 SDO 3/17/2020 Yes No Yes Yes Cloudy 37 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 08ISDO154 SDO 3/17/2020 No No Yes Yes Cloudy 33 > 48 hours <0.1 in. Outfall Flow Slow 2 4 None Clear Clear None None Yes 0.25 0 0 7.82 1032 9.3 0.5 E.coli 260 No 08ISDO155 SDO 3/17/2020 Yes No Yes Yes Cloudy 34 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 08ISDO156 SDO 3/17/2020 No No Yes Yes Cloudy 34 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 08ISDO158 SDO 3/17/2020 Yes No Yes Yes Cloudy 34 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 08ISDO207 SDO 3/17/2020 Yes No Yes Yes Cloudy 34 > 48 hours <0.1 in. Outfall Dry None 0 0 None No No Flow 08ISDO209 SDO 3/17/2020 Yes No Yes Yes Cloudy 36 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 08JSDO102 SDO 3/13/2020 No Yes Yes Yes Cloudy 49 > 48 hours <0.1 in. 8:50 AM Outfall Dry None 0 0 None No No Flow 08JSDO103 SDO 3/17/2020 Yes No Yes Yes Cloudy 33 > 48 hours <0.1 in. Outfall Flow Moderate 0 5 None Clear Clear None None Yes 0.5 0 0 8.21 1393 9.3 0.7 E.coli 6000 No 08JSDO41 SDO 3/17/2020 No No Yes Yes Cloudy 33 > 48 hours <0.1 in. Outfall Dry None 0 0 None No No Flow 08JSDO50 SDO 3/17/2020 No No Yes Yes Cloudy 33 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 08KSDO49 SDO 3/13/2020 Yes Yes Yes Yes Cloudy 49 < 48 hours <0.1 in. 8:50 AM Outfall Dry None 0 0 None No No Flow 09BSDO49 SDO 3/18/2020 No No Yes Yes Cloudy 48 > 48 hours <0.1 in. Manhole Dry None 15 30 None Orange None 9BMH55 Round 0 Concrete 0 No Yes 2 ‐ Mod: 1‐ 0 ‐ No 4 ‐ Yes 1 ‐ Min: broke0 ‐ No NA NA NA No No Flow Outlet submerged. Inlets observed dry. 09ESDO229 SDO 5/7/2020 No No No No Sunny 51 > 48 hours <0.1 in. Manhole Dry None 9EMH191 No No Flow CNL outfall 09ESDO243 SDO 5/7/2020 No No Yes Yes Sunny 51 < 48 hours <0.1 in. Outfall Flow Slow 2 15 None Clear Clear None Sediments Yes 0.5 0 0 7.71 948 10.7 0.5 E.coli 10 No 09KSDO100 SDO 3/17/2020 No Yes Yes Yes Cloudy 38 > 48 hours <0.1 in. 12:49 PM Manhole Flow Slow 0 100 SaltWater Clear None None 9KMH62 Unknown 0 Concrete 0 No No 1 ‐ Min: <1g0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.25 0 0 7.78 702 9.2 0.3 Enterococci 70 No 09KSDO101 SDO 3/17/2020 No Yes Yes Yes Cloudy 39 > 48 hours <0.1 in. 12:49 PM Outfall Flow Slow 5 10 SaltWater Clear Clear None None Yes 0.75 3 0 6.98 2090 9.3 1.1 Enterococci 10000 No 09KSDO16 SDO 3/13/2020 No Yes No No Cloudy 49 < 48 hours <0.1 in. 8:50 AM Manhole Dry None 8KMH41 No No Flow 09LSDO095 SDO 3/17/2020 Yes Yes Yes Yes Cloudy 40 > 48 hours <0.1 in. 12:49 PM Outfall Flow Slow 0 0 SaltWater Clear Clear None None Yes 2 0.1 0 7.91 1906 8.7 Outside Range Enterococci 70 No 10BSDO15 SDO 3/18/2020 Yes No Yes Yes Sunny 48 > 48 hours <0.1 in. Outfall StandingWater None 0 None Clear None Round 0 Concrete 0 No No 2 ‐ Mod: 1‐ 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No NA No StandingWater outlet screen above water level. no us features located. 10LSDO094 SDO 3/18/2020 No Yes Yes Yes Sunny 50 > 48 hours <0.1 in. 1:56 AM Outfall Flow Slow 5 10 SaltWater Clear Clear None Sediments Yes 0 0.3 0 7.55 3960 13 2.1 Enterococci 180 No 10LSDO096 SDO 3/18/2020 No Yes Yes Yes Sunny 50 > 48 hours <0.1 in. 1:56 AM Outfall Flow Moderate 5 20 None Clear Clear None None Yes 3 1 0 7.59 Outside Range 15.5 Outside Range Enterococci 15000 No 11BMH49 Interconnection 5/11/2020 Manhole Dry None 0 0 None None 11BMH49 No No Flow 11BSDO123 SDO 5/7/2020 No No No No Sunny 52 < 48 hours <0.1 in. Manhole StandingWater None 100 0 100 None None None 11BMH43 No StandingWater 11GSDO344 (11GMH246) SDO 5/11/2020 No No No No Sunny 57 > 48 hours <0.1 in. Manhole Dry None 11GMH245 No No Flow Could not Open mh 11GMH246. Insufficient flow at manhole 11GMH245. 11GSDO344 (11GMH247) SDO 5/11/2020 No No No No Sunny 57 > 48 hours <0.1 in. Manhole Dry None 11GMH249 No No Flow 11ISDO577 SDO 3/17/2020 Yes No Yes Yes Cloudy 40 > 48 hours <0.1 in. Outfall Flow Slow 0 50 None Clear Clear None None Yes 0.25 0.6 0 7.41 838 9.1 0.4 E.coli 80000 No 11MSDO093 SDO 3/17/2020 No Yes Yes Yes Cloudy 41 > 48 hours <0.1 in. 12:49 PM Outfall Flow Moderate 0 1 None Clear Clear None None Yes 1.5 4 0 7.72 6180 9.6 8.7 Enterococci 2300 No 12BSDO10 SDO 3/18/2020 Yes No No No Sunny 49 > 48 hours <0.1 in. Outfall Submerged None 100 100 None No Other Submerged Outfall submerged 12BSDO124 SDO 5/7/2020 Yes No Yes Yes Sunny 52 > 48 hours <0.1 in. Outfall Flow Slow 0 70 None Clear Clear None None Yes 0.5 2 0.1 6.87 821 11.5 0.4 E.coli 10 No 12BSDO14 SDO 3/18/2020 No No No No Sunny 49 > 48 hours <0.1 in. Manhole Dry None 100 100 None Clear 12BMH3 No No Flow Outfall not accessible, under bridge. 12BSDO33 SDO 5/7/2020 No No No No Sunny 52 > 48 hours <0.1 in. Manhole Flow Moderate 12BMH32 Yes 0 0 0 6.59 414 11.4 0.2 E.coli 10 No 12ESDO418 SDO 5/7/2020 No No Yes Yes Sunny 57 > 48 hours <0.1 in. Manhole StandingWater None 15 50 None Clear Clear None None 12FMH41, 12FMHRound 0 Metal 0 No No 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No NA NA NA NA No StandingWater 12FSDO305 SDO 5/7/2020 No No Yes Yes Sunny 61 < 48 hours <0.1 in. Outfall Dry None 0 0 None No No Flow 12HSDO1 (12HMH26) SDO 5/7/2020 No No No No Sunny 61 > 48 hours <0.1 in. Manhole StandingWater None 12HMH24 Other Unknown Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 2 ‐ Mod: geNA NA NA No StandingWater 12HSDO1 (12HMH27) SDO 5/7/2020 No No No No Sunny 61 > 48 hours <0.1 in. Manhole StandingWater None 12HMH29 Other Unknown Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 2 ‐ Mod: geNA NA NA No StandingWater 12HSDO92 SDO 5/7/2020 No No Yes Yes Sunny 61 > 48 hours <0.1 in. Outfall Submerged None 100 0 100 None Clear Clear None None No Other Submerged 12LMH304 Interconnection 3/17/2020 Manhole Flow Slow 0 20 None Clear Clear None None 12LMH304 Yes 1.5 0.3 0 7.65 Outside Range 8.5 Outside Range Enterococci 210 No 12LMH374 Interconnection 3/17/2020 Manhole Dry None 10 10 None Sediments 12LMH374 No No Flow 12LSDO092 SDO 3/17/2020 No Yes Yes Yes Cloudy 41 > 48 hours <0.1 in. 12:49 PM Outfall Flow Moderate 0 25 None Clear Clear OilySheen Sediments Yes 2 0.6 0 7.72 Outside Range 7.4 Outside Range Enterococci 160 No 12MSDO091 SDO 3/17/2020 No Yes Yes Yes Cloudy 41 > 48 hours <0.1 in. 12:49 PM Outfall Flow Slow 25 30 None Clear Clear None None Yes 3 0.2 0 7.91 Outside Range 7.6 Outside Range Enterococci 60 No 13BSDO11 SDO 5/7/2020 Yes No Yes Yes Sunny 56 > 48 hours <0.1 in. Manhole StandingWater None 100 0 100 None Clear None None 13BMH10 Round 0 Other Unknown No No NA NA NA NA NA NA NA NA No StandingWater 13DSDO077 SDO 3/17/2020 Yes No Yes Yes Cloudy 33 > 48 hours <0.1 in. Outfall Flow Slow 15 35 None Clear Clear None None Yes 0 0 0 6.69 688 8.1 0.3 E.coli 3600 No 13DSDO078 SDO 3/17/2020 Yes No Yes Yes Cloudy 33 > 48 hours <0.1 in. Manhole StandingWater None 15 30 None Clear Clear None None 13DMH55 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA No StandingWater 13ESDO174 SDO 3/17/2020 No No Yes Yes Cloudy 36 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 13ESDO175 SDO 3/17/2020 No No Yes Yes Cloudy 34 > 48 hours <0.1 in. Outfall Flow Slow 30 5 30 None Clear Clear Foam None Yes 0 0 0 6.95 1059 6.6 0.5 E.coli 300 No 13ESDO176 SDO 3/17/2020 No No Yes Yes Cloudy 36 > 48 hours <0.1 in. Manhole Dry None 80 0 80 None 12EMH146 Round 0 Unknown 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA No No Flow 13FSDO11 SDO 3/17/2020 No No Yes Yes Cloudy 37 > 48 hours <0.1 in. Outfall Flow Heavy 0 10 None Clear Clear None None Yes 0.25 0.1 0 7.17 1665 9.1 0.8 E.coli 2700 No 13FSDO12 SDO 3/17/2020 No No Yes Yes Cloudy 40 > 48 hours <0.1 in. Outfall Flow Slow 15 2 15 None Clear Clear None Sediments Yes 0.25 0 0 7.24 1048 5.8 0.5 E.coli 110 No 13FSDO95 SDO 3/17/2020 No No Yes Yes Cloudy 37 > 48 hours <0.1 in. Manhole StandingWater None 100 100 13FMH41 Round 0 Concrete 0 Yes No 0 ‐ No 3 ‐ Yes, Brok NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA No StandingWater 13FSDO96 SDO 3/17/2020 No No Yes Yes Cloudy 36 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 13FSDO97 SDO 3/17/2020 No No Yes Yes Cloudy 36 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 13LSDO090 SDO 3/18/2020 No Yes Yes Yes Sunny 50 > 48 hours <0.1 in. 1:56 AM Outfall Flow Moderate 0 5 None Clear Clear None None Yes 0.6 0 7.71 Outside Range 11.2 Outside Range Enterococci 5100 No 14CSDO9 SDO 3/5/2020 Yes No Yes Yes Sunny 47 > 48 hours <0.1 in. Outfall Dry None 0 0 None None No No Flow 14EMH36 Interconnection 3/18/2020 Manhole Dry None 0 0 None 14EMH36 No No Flow 15FSDO288 SDO 3/5/2020 No No Yes Yes Sunny 45 > 48 hours <0.1 in. Outfall Flow Slow 5 15 None Clear Clear None Sediments Yes 0.5 0.1 0 8.05 1065 9.6 0.5 E.coli 53000 No 15LSDO088 SDO 3/17/2020 Yes Yes Yes Yes Cloudy 38 > 48 hours <0.1 in. 12:49 PM Outfall Flow Slow 5 10 SaltWater Clear Clear None Sediments Yes 3 0 0 7.57 Outside Range 7.9 Outside Range Enterococci 10 No 15LSDO089 SDO 3/18/2020 No Yes Yes Yes Sunny 48 > 48 hours <0.1 in. 1:56 AM Manhole Flow Moderate 100 0 100 None 15LMH11 Other Unknown Concrete 0 No No NA NA NA NA NA NA NA NA Yes 3 0 0 7.12 Outside Range 9.7 Outside Range Enterococci 10 Yes 10 16LSDO097 SDO 3/17/2020 No Yes Yes Yes Cloudy 39 > 48 hours <0.1 in. 12:49 PM Outfall Flow Moderate 0 5 SaltWater Clear Clear None None Yes 3 0.2 0 7.3 Outside Range 9.2 Outside Range Enterococci 10 No 16LSDO122 SDO 3/17/2020 No Yes Yes Yes Cloudy 39 > 48 hours <0.1 in. 12:49 PM Outfall Flow Slow 10 40 SaltWater Clear Clear None None Yes 3 2 0 7.17 Outside Range 8.8 Outside Range Enterococci 10 No 17FSDO12 SDO 3/5/2020 Yes No Yes Yes Sunny 47 > 48 hours <0.1 in. Outfall Flow Slow 0 2 None Clear Clear None None Yes 0.25 0 0 8.33 925 6.7 0.4 E.coli 90 No 17MSDO33 SDO 3/18/2020 No Yes Yes Yes Sunny 50 > 48 hours <0.1 in. 1:56 AM Outfall Flow Moderate 0 25 None Clear Clear None None Yes 2 0 0 8.13 Outside Range 8.2 Outside Range Enterococci 10 No 18GSDO233 SDO 3/5/2020 Yes No Yes Yes Sunny 47 > 48 hours <0.1 in. Outfall Flow Slow 1 10 None Clear Clear None None Yes 0.75 0.1 0 8.07 1805 10.3 0.8 E.coli 11000 No 18LCSO086 CSO 5/18/2020 No Yes No No Cloudy 55 > 48 hours <0.1 in. 3:17 AM Manhole Flow Moderate 0 30 None Clear Clear None None 18LMH27 Yes 1.5 0 0 7.43 Outside Range 13 Outside Range Submerged, CNL outfall Enterococci 10 No 19GSDO043 SDO 3/5/2020 No No No No Sunny 50 > 48 hours <0.1 in. Manhole Flow Slow 19GMH15 Yes 1.5 10 0 8.28 5100 2.6 2.6 Flow picked up while sam E.coli 47000 No 19GSDO194 SDO 3/5/2020 No No No No Sunny 50 > 48 hours <0.1 in. Manhole Flow Slow 19GMH31 Yes 0.5 0 0 8.31 2540 10.4 1.3 E.coli 250 No 19GSDO199 SDO 3/5/2020 No No Yes Yes Sunny 50 > 48 hours <0.1 in. CatchBasin StandingWater None 100 100 100 None Sediments 19GCB12 No StandingWater Submerged 19LCSO084 CSO 5/14/2020 No Yes No No Sunny 61 > 48 hours <0.1 in. 11:47 AM Manhole Flow Slow 100 0 100 19LMH260 Yes 0.25 0.3 0.4 7.5 2510 17.6 1.3 Enterococci 10 No 19LCSO085 CSO 5/14/2020 No Yes No No Sunny 61 > 48 hours <0.1 in. 11:47 AM Manhole Flow Slow 100 0 100 CH58698 Yes 3 0.3 0 7.81 Outside Range 16 Outside Range Enterococci 10 No 19MCSO082 CSO 5/14/2020 No Yes No No Sunny 57 > 48 hours <0.1 in. 11:47 AM Manhole Flow Moderate 100 0 100 19MMH181 Yes 0.5 2 0 7.78 8390 16.7 4.7 Enterococci 690 No 19NCSO081 CSO 5/14/2020 Yes Yes Yes Yes Sunny 57 > 48 hours <0.1 in. 11:47 AM Outfall Dry None 0 0 None No No Flow 20DMH19 Interconnection 3/11/2020 Manhole Flow Heavy 0 10 None Clear Clear None None 20DMH19 Yes 0 0.4 0 8.11 1342 9.7 0.6 E.coli 2400 No 20DMH62 Interconnection 5/6/2020 Manhole Dry None 0 0 None None 20DMH62 No No Flow 20DNP140 Interconnection 5/6/2020 Manhole Flow Moderate 0 5 Musty Clear Cloudy None None 20DMH185 Yes 0.5 6 0 8.14 1857 13.1 0.9 E.coli 16000 No TABLE 1. DRY WEATHER SCREENING RESULTS JANUARY 1, 2020 THROUGH DECEMBER 31, 2020 Bar Screen Bacteria If Sediment Depth Water Other Pipe End Bar Screen Head Wall Rip Rap Rip Rap Tide Gate Other Bacteria Inspection Outfall Tidal Outfall Outfall Air Time Since Quantity Time Low Sampling If Flow Other Other Other Deposits Manhole Facility Other Pipe Pipe Other Pipe Needs Needs Pipe End Broken Samples Bacteria Duplicate Facility ID Location Type Weather Is There Flow Submerged Depth plus Sed Odor Color Turbidity Floatables Deposits Pipe Shape Broken Needs Corroded Debris Broken Broken If No Reason Reason No Surfactants Ammonia Chlorine pH Conductivity Temperature Salinity Comments Bacteria Type Duplicate Date Sign Impact Located Accessible Temp F Last Rain Rain24h Tide Location Velocity Odor Color Floatables Stains ID Shape Material Material Repair Cleaning Debris Missing Collected Result Sample Percent percent percent Stains Collapsed Cleared Pit Spall Deposition Missing Missing Sample Sample Result Deter Collect 20GSDO161 SDO 3/23/2020 Yes No Yes Yes Cloudy 41 > 48 hours <0.1 in. Outfall Flow Slow 0 50 None Clear Clear None None Yes 0.5 0.1 0 8.56 2540 11 1.3 E.coli 430 No 20GSDO163 SDO 12/16/2020 No No No No Cloudy 24 > 48 hours <0.1 in. Manhole Dry None Clear None None 20GMH107 No No Flow CNL outfall. US mh 20GMH108 standing water. Upstream mh 20GMH107 dry. 20GSDO164 SDO 3/5/2020 No No No No Sunny 50 > 48 hours <0.1 in. Manhole Dry None 20GCB126 No No Flow 21CSDO212 SDO 5/7/2020 Yes No Yes Yes Sunny 65 > 48 hours <0.1 in. Outfall Flow Moderate 10 25 None Clear Clear None Sediments Yes 0 0 0 8.58 1300 14.4 0.8 E.coli 10 No 21DMH319 Interconnection 3/11/2020 Manhole Flow Moderate 0 5 Musty Clear Clear None Sediments 21DMH319 Yes 0.5 3 0 7.53 2330 13 1.2 E.coli 41000 No 21EMH64 Interconnection 3/11/2020 Manhole Flow Moderate 0 2 Other Gas Clear Clear None Sediments 21EMH64 Yes 0.25 0.4 0 7.97 3980 11.3 2.1 E.coli 30 No 21EMH86 Interconnection 3/11/2020 Manhole Flow Moderate 0 10 None Clear Clear None None 21EMH86 Yes 0 0 2 8.54 182 8.1 0 E.coli 10 No 21HCSO046‐1 (15GMH290) CSO 5/6/2020 Manhole Flow Moderate 0 10 None Yellow Clear None None 15GMH290 Yes 0 0.1 0 8.19 1014 11.8 0.5 E.coli 16000 No 21HCSO046‐1 (19HMH222) CSO 5/6/2020 Manhole Flow Slow 0 50 None Clear Clear None None 19HMH222 Yes 0.5 0.2 0 8.23 1111 12.1 0.5 E.coli 5000 No 21HCSO046‐1 (23IMH1) CSO 5/6/2020 Manhole Flow Slow 0 50 None Clear Cloudy None None 23IMH1 Yes 0 0.3 0 8.1 1058 13.4 0.5 E.coli 5000 No 21HSDO001 SDO 5/7/2020 No No No No Sunny 60 > 48 hours <0.1 in. Manhole Flow Slow 21HMH61 Yes 3 1 0 9.53 2090 18.3 1.3 Flow from NW inlet, SW inE.coli 2200 No 21HSDO002 SDO 5/7/2020 No No No No Sunny 60 > 48 hours <0.1 in. Manhole StandingWater None 21HMH37 No StandingWater CNL outfall 21HSDO045 SDO 5/7/2020 No No Yes Yes Sunny 62 > 48 hours <0.1 in. Outfall Flow Slow 0 20 None Yellow Clear None None Yes 0 0.1 1 8.73 998 16 0.6 E.coli 400 No 21HSDO047 SDO 5/11/2020 No No No No Cloudy 64 > 48 hours <0.1 in. Manhole Flow Slow 100 0 100 None None 20HMH42 Round 0 Metal 0 0 0 0 0 0 0 0 0 0 0 Yes 0 4 0 8.66 1946 16.3 1.2 E.coli 7700 No 21HSDO048 SDO 5/7/2020 No No No No Sunny 60 > 48 hours <0.1 in. Manhole Dry None 100 0 100 None 21HMH264, 20HMOther Unknown Concrete 0 No No 2 ‐ Mod: 1‐ 0 ‐ No NA NA NA NA NA NA No No Flow 21KCSO070 CSO 5/27/2020 Yes Yes Yes Yes Sunny 66 > 48 hours <0.1 in. 9:23 AM Outfall Flow Slow 0 20 None Clear Clear OilySheen None Yes 2 0 0 9.05 Outside Range 18 Outside Range Enterococci 1800 Yes 1100 21KSDO069 SDO 3/18/2020 No Yes Yes Yes Sunny 50 > 48 hours <0.1 in. 1:56 AM Manhole Flow Moderate 90 5 90 None Clear Clear None None 21KMH489 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No NA NA Yes 1.5 0.3 0.4 9.32 7090 13.3 4.8 Enterococci 20 No 21LCSO076 CSO 5/18/2020 Yes Yes Yes Yes Cloudy 55 > 48 hours <0.1 in. 3:17 AM Outfall Flow Slow 5 15 None Clear Clear None None Yes 1 2 0 7.39 Outside Range 12.6 Outside Range Enterococci 140 No 21MCSO078 CSO 5/18/2020 Yes Yes Yes Yes Cloudy 57 > 48 hours <0.1 in. 3:17 AM Outfall Flow Moderate 0 10 None Clear Clear None None Yes 0.5 2 0 7.02 5140 16.5 2.8 Enterococci 330 Yes 270 21MCSO079 CSO 5/18/2020 Yes Yes No No Cloudy 57 > 48 hours <0.1 in. 3:17 AM Manhole Flow Moderate 21MMH17 Yes 0.75 0 0 7.37 16630 14.2 9.8 Enterococci 10 No 21MSDO010 SDO 5/11/2020 No Yes Yes Yes Sunny 50 > 48 hours <0.1 in. 9:01 AM Outfall Flow Moderate 1 5 SaltWater Clear Clear None Other Benthic growth Yes 3 0.1 0 7.28 Outside Range 14.4 Outside Range Enterococci 10 No 21MSDO50 SDO 5/11/2020 No Yes Yes Yes Sunny 51 > 48 hours <0.1 in. 9:01 AM Outfall Flow Slow 1 2 SaltWater Clear Clear None Sediments Yes 3 0.3 0 7.41 Outside Range 16.4 Outside Range Enterococci 250 No 21NCSO80 CSO 5/14/2020 No Yes No No Sunny 57 > 48 hours <0.1 in. 11:47 AM Manhole Flow Moderate 21NMH9 Yes 2 0.1 0 7.36 Outside Range 14.7 Outside Range Enterococci 10 No 22CSDO384 SDO 5/6/2020 Yes No Yes Yes Sunny 55 > 48 hours <0.1 in. Outfall Flow Moderate 0 15 None Clear Clear None None Yes 0.5 0 0 7.71 746 15.7 0.4 E.coli 10 No 22KCSO065 CSO 5/14/2020 Yes Yes Yes Yes Sunny 55 > 48 hours <0.1 in. 11:47 AM Manhole Flow Slow 40 10 40 None 22KMH197 Other Horseshoe Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etc0 ‐ No 0 ‐ No NA Yes 3 0.1 0 9.31 Outside Range 16.6 Outside Range Enterococci 50 No 22KCSO068 CSO 5/14/2020 Yes Yes Yes Yes Sunny 52 > 48 hours <0.1 in. 11:47 AM Manhole StandingWater None 90 15 90 None 22KMH427 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA 0 ‐ No 0 ‐ No NA No StandingWater 22KCSO072 CSO 5/14/2020 No Yes Yes Yes Sunny 69 > 48 hours <0.1 in. 11:47 AM Manhole Dry None 5 0 5 None 22KMH418 Round 0 Other Unknown No No 0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etc0 ‐ No 0 ‐ No NA No No Flow 22LCSO073 CSO 5/27/2020 No Yes Yes Yes Sunny 66 > 48 hours <0.1 in. 9:23 AM Manhole Flow Slow 80 10 80 SaltWater OilySheen None 22LMH447 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 2 ‐ Mod: ge0 ‐ No 0 ‐ No NA Yes 2 0.3 0 8.98 Outside Range 18.2 Outside Range Enterococci 4300 No 22LSDO580 SDO 5/11/2020 No Yes Yes Yes Sunny 52 > 48 hours <0.1 in. 9:01 AM Manhole Flow Moderate 2 2 None 22LMH294 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No Yes 2 0.1 0 7.49 Outside Range 15.8 Outside Range Enterococci 20 No 23BMH89 Interconnection 3/11/2020 Manhole Flow Slow 1 2 None Clear Clear None Sediments 23BMH89 Yes 0.25 0.3 0 7.16 327 8.6 0.1 E.coli 1200 No 23GSDO132 SDO 5/6/2020 No No Yes Yes Sunny 54 > 48 hours <0.1 in. Manhole Flow Moderate 75 0 75 None Garbage None 23GMH93 Unknown 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.25 4 0 7.31 1702 14.5 0.9 E.coli 43000 No 23HMH81 Interconnection 3/12/2020 Manhole StandingWater None 1 10 None None None 23HMH137 No StandingWater interconnection 23HSDO040 SDO 5/6/2020 No No No No Sunny 50 > 48 hours <0.1 in. Manhole Dry None 100 0 100 None 23HMH68 No No Flow 23HSDO042 SDO 5/6/2020 No No No No Sunny 50 > 48 hours <0.1 in. Manhole StandingWater None 100 0 100 None 23HMH111, 23HMH131 No StandingWater 23LCSO062 CSO 5/18/2020 Yes Yes Yes Yes Cloudy 62 > 48 hours <0.1 in. 3:17 PM Manhole StandingWater None 70 10 70 SaltWater None Sediments 23LMH267 Unknown 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 2 ‐ Mod: ge0 ‐ No 0 ‐ No 0 ‐ No No StandingWater 23LCSO064 CSO 5/14/2020 No Yes No No Sunny 61 > 48 hours <0.1 in. 11:47 AM Manhole Dry None 100 0 100 23LMH92 No No Flow 23LSDO074 SDO 5/11/2020 No Yes Yes Yes Sunny 55 > 48 hours <0.1 in. 9:01 AM Outfall Dry None 0 0 None None No No Flow 23LSDO075 SDO 5/14/2020 No Yes No No Sunny 63 > 48 hours <0.1 in. 11:47 AM Manhole Flow Moderate 100 0 100 23LMH80 Yes 2 0.2 0 9.22 Outside Range 13.4 Outside Range Enterococci 110 No 23LSDO15 SDO 5/18/2020 No Yes Yes Yes Cloudy 62 > 48 hours <0.1 in. 3:17 PM Outfall Submerged None 100 0 100 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA 2 ‐ Mod: 1‐3g 0 ‐ No NA No Other Submerged Unable to open upstream manhole 23LMH233 due to construction 23LSDO164 SDO 5/14/2020 Yes Yes Yes No Sunny 55 > 48 hours <0.1 in. 11:47 AM Manhole Flow Slow 0 0 None Clear Clear None None 23LMH163 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA 0 ‐ No 0 ‐ No NA Yes 3 0.2 0 9.31 Outside Range 18.8 Outside Range Enterococci 40 No 23LSDO195 SDO 5/18/2020 Yes Yes Yes Yes Cloudy 54 > 48 hours <0.1 in. 3:17 AM Outfall Flow Slow 0 10 None Clear Clear None None Yes 3 0.3 0 9.43 Outside Range 15.2 Outside Range Enterococci 30 No 23LSDO196 SDO 5/14/2020 No Yes No No Sunny 61 > 48 hours <0.1 in. 11:47 AM Manhole Flow Slow 23LMH188 Yes 2 0.2 0 9.28 14130 15.6 Outside Range Enterococci 30 No 23LSDO202 SDO 5/18/2020 No Yes Yes Yes Cloudy 62 > 48 hours <0.1 in. 3:17 PM Outfall Flow Slow 30 10 30 None Clear Clear None Sediments Yes 2 0 0 9.56 18120 14.8 Outside Range Cloudy discharge before t Enterococci 380 No 24CSDO174 SDO 3/12/2020 No No Yes Yes Cloudy 40 > 48 hours <0.1 in. Outfall Flow Moderate 0 5 None Clear Clear None Sediments Yes 0.5 0 0 7.67 2330 10 1.2 E.coli 410 No 24CSDO39 SDO 3/12/2020 No No No No Cloudy 40 > 48 hours <0.1 in. Manhole Flow Moderate 24CMH14 Round 0 0 0 0 0 NA NA NA NA NA NA NA NA Yes 1 0 0 8.31 2810 6.7 1.4 E.coli 2600 No 24DSDO032 SDO 3/12/2020 Yes No Yes Yes Cloudy 45 > 48 hours <0.1 in. Manhole StandingWater None 50 0 50 24DMH337 Square 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA No StandingWater 24DSDO150 SDO 3/12/2020 Yes No Yes Yes Sunny 45 > 48 hours <0.1 in. Outfall Dry None 0 None No No Flow 24GSDO034 SDO 5/7/2020 No No No No Sunny 55 > 48 hours <0.1 in. Manhole Flow Slow 100 0 100 None 25GMH8 Other Unknown Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 2 0 8.57 1614 13.9 1 E.coli 10 No 24GSDO035 SDO 3/12/2020 No No Yes Yes Cloudy 45 > 48 hours <0.1 in. Manhole Flow Moderate 25 1 25 23FMH286 Unknown 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 1.5 0.2 0 8.04 3500 10.8 1.8 E.coli 3400 Yes 2800 24LCSO060 CSO 5/14/2020 No Yes No No Sunny 58 > 48 hours <0.1 in. 11:47 AM Manhole Flow Moderate 100 0 100 SaltWater Clear Clear None Other Benthic grow24LMH265 Yes 0.5 0.5 0 7.18 8600 19.7 4.8 Enterococci 10 No 24LSDO22 SDO 5/26/2020 No Yes Yes Yes Sunny 63 > 48 hours <0.1 in. 8:36 AM Manhole Flow Slow 10 50 None None 24LMH369 Round 0 Other Unknown No No NA NA NA NA NA NA NA NA Yes 3 0 0 9.35 Outside Range 14.7 Outside Range Enterococci 10 No 24LSDO233 SDO 5/26/2020 Yes Yes No No Sunny 61 > 48 hours <0.1 in. 8:36 AM Manhole Flow Moderate 100 0 100 None 24LMH396 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No NA NA Yes 1.5 0 0 9.17 17690 15.9 Outside Range Sample taken from south Enterococci 70 No 24NCSO003 CSO 5/14/2020 No Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 11:47 AM Manhole StandingWater None 80 0 80 Unmapped Other Horseshoe Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA No StandingWater Submerged outfall, unmapped upstream feature is standing water 25DSDO040 SDO 3/12/2020 Yes No Yes Yes Cloudy 45 > 48 hours <0.1 in. Manhole Flow Slow 5 1 5 25DMH23 Round 0 Other Unknown No No 0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etcNA NA NA Yes 1 3 0 7.89 3230 6.6 1.7 E.coli 60 No 25ESDO037 SDO 3/12/2020 No No Yes Yes Cloudy 45 > 48 hours <0.1 in. Manhole StandingWater None 100 100 25EMH131 Round 0 VC 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA No StandingWater continued upstream 25GSDO041 SDO 5/7/2020 Yes No Yes Yes Sunny 56 > 48 hours <0.1 in. Outfall Flow Slow 0 2 None Clear Clear None None Yes 0 1 0 8.64 2610 16.1 1.7 Sample taken at SDO8 loc E.coli 10 No 25LCSO057 CSO 5/14/2020 No Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 11:47 AM Outfall Flow Moderate 2 5 None Clear Clear None None Yes 2 0.3 0 7.35 Outside Range 14.6 Outside Range Enterococci 10 No 25LSDO058 SDO 5/26/2020 No Yes Yes Yes Sunny 58 > 48 hours <0.1 in. 8:36 AM Outfall Flow Moderate 0 10 None Clear Clear None None Yes 2 0 0 9.34 18100 16.3 Outside Range Enterococci 90 No 25LSDO144 SDO 5/26/2020 No Yes Yes Yes Cloudy 58 > 48 hours <0.1 in. 8:36 AM Outfall Flow Moderate 0 30 None Clear Clear None None Yes 1 0.3 1.5 9.86 5050 14.8 3.4 Enterococci 10 No 25MCSO005 CSO 5/26/2020 Yes Yes No No Sunny 60 > 48 hours <0.1 in. 8:36 AM Manhole Flow Moderate 100 0 100 None 25MMH60 Round 0 Other Brick Sewer No No 1 ‐ Min: <1g0 ‐ No NA NA NA NA NA NA Yes 1 3 0 7.6 9880 15.5 5.6 Enterococci 28000 No 25MSDO006 SDO 5/26/2020 No Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 8:36 AM Outfall Flow Slow 5 15 None Clear Clear None None Yes 2 0 0 7.35 Outside Range 14.6 Outside Range Enterococci 10 Yes 10 25MSDO007 SDO 5/26/2020 No Yes No No Sunny 60 > 48 hours <0.1 in. 8:36 AM Manhole Dry None 26MMH338 No No Flow No access to outfall 25NCSO004 CSO 5/26/2020 No Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 8:36 AM Manhole Flow Slow 0 50 SaltWater Clear None 25MMH74 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No Yes 1.5 0.1 0 7.44 9950 15.7 5.6 Enterococci 10 No 26FSDO038 SDO 5/7/2020 No No No No Sunny 53 > 48 hours <0.1 in. Manhole StandingWater None 100 0 100 None 26FMH9 No StandingWater 26GSDO01 SDO 5/7/2020 No No Yes Yes Sunny 46 > 48 hours <0.1 in. Manhole Flow Moderate 50 0 50 None None 26GMH2 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0 0.6 0 8.78 1555 13.9 1 E.coli 10 Yes 10 26JSDO049 SDO 5/27/2020 No Yes No No Sunny 71 > 48 hours <0.1 in. 9:23 AM Manhole Flow Moderate 100 0 100 CH62697 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA Yes 0.75 3 0 7.95 781 18.3 0.4 Enterococci 10 No 26JSDO052 SDO 5/7/2020 No No Yes Yes Sunny 49 < 48 hours <0.1 in. Manhole Dry None 100 0 100 None 26JMH37 Round 0 Concrete 0 No No NA NA NA NA NA NA NA NA No No Flow 26JSDO101 SDO 5/27/2020 No Yes Yes No Sunny 71 > 48 hours <0.1 in. 9:23 AM Manhole StandingWater None 100 0 100 26JMH85 Round 0 Concrete 0 No No NA NA NA NA NA NA NA NA No StandingWater 26KSDO050 SDO 5/27/2020 No Yes No No Sunny 71 > 48 hours <0.1 in. 9:23 AM Manhole Dry None 100 0 100 26KMH316, 26KMRound 0 Other Unknown No No NA NA NA NA NA NA NA NA No No Flow 26KSDO052 SDO 5/27/2020 No Yes No No Sunny 75 > 48 hours <0.1 in. 9:23 AM Manhole Dry None 26KMH533 Unknown 0 Other Unknown No No NA NA NA NA NA NA NA NA No No Flow 26KSDO099 SDO 5/27/2020 No Yes No No Sunny 72 > 48 hours <0.1 in. 9:23 AM Manhole Flow Slow 100 0 100 27KMH377 Yes 3 10 0 8 15140 19.9 8.9 Enterococci 10 Yes 10 26KSDO254 SDO 5/27/2020 No Yes No No Sunny 74 > 48 hours <0.1 in. 9:23 AM Manhole Dry None 100 0 100 26KMH629 No No Flow 26KSDO35 SDO 5/27/2020 No Yes Yes Yes Sunny 74 > 48 hours <0.1 in. 9:23 AM Outfall Flow Moderate 1 5 None Clear Clear None None Yes 2 0 0 8.2 Outside Range 17.1 Outside Range Enterococci 10 No 26LCSO009 CSO 5/14/2020 No Yes Yes Yes Sunny 62 > 48 hours <0.1 in. 11:47 AM Outfall Flow Slow 0 1 None Clear Clear None Other Barnacle Yes 2 0.1 0 7.02 Outside Range 25.2 Outside Range Enterococci 10 No 26LSDO084 SDO 5/26/2020 No Yes Yes Yes Sunny 65 > 48 hours <0.1 in. 8:36 AM Manhole Flow Slow 0 2 None Clear Clear None None 26LMH82 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA 0 ‐ No 0 ‐ No NA Yes 2 0.1 0 7.23 Outside Range 21.1 Outside Range Enterococci 100 No 26LSDO106 SDO 5/26/2020 No Yes No No Sunny 68 > 48 hours <0.1 in. 8:36 AM Manhole Dry None 26LMH117 Round 0 Other Unknown No No NA NA NA NA NA NA NA NA No No Flow 26LSDO70 SDO 5/27/2020 No Yes No No Sunny 76 > 48 hours <0.1 in. 9:23 AM Manhole StandingWater None 26LMH89 Round 0 Other Unknown No No NA NA NA NA NA NA NA NA No StandingWater 27JSDO001 SDO 5/18/2020 No Yes No No Sunny 62 > 48 hours <0.1 in. 3:17 AM Manhole StandingWater None 100 0 100 27JMH17 No StandingWater 27JSDO044 SDO 5/18/2020 No Yes No No Sunny 62 > 48 hours <0.1 in. 3:17 AM Manhole StandingWater None 100 0 0 27JMH46 No StandingWater 27JSDO096 SDO 5/18/2020 No Yes No No Sunny 62 > 48 hours <0.1 in. 3:17 AM Manhole StandingWater None 100 0 100 27JMH94 No StandingWater 27LCSO010 CSO 5/26/2020 No Yes Yes Yes Sunny 58 > 48 hours <0.1 in. 8:36 AM Outfall Flow Moderate 10 15 SaltWater Clear Clear None Other Benthic growth Yes 3 0 0 7.04 Outside Range 18 Outside Range Enterococci 10 No 27LSDO020/27LSDO022 SDO 5/11/2020 Yes Yes No No Sunny 57 > 48 hours <0.1 in. 9:01 AM Manhole Flow Slow 100 0 100 None Clear Clear None None 27KMH542 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 1.5 0 0 7.81 Outside Range 14.7 Outside Range Enterococci 10 No 28IMH15 Interconnection 5/6/2020 Manhole StandingWater None 0 50 None None 28JMH15 No StandingWater 28KSDO010 SDO 5/11/2020 Yes Yes Yes No Sunny 52 > 48 hours <0.1 in. 9:01 AM Manhole Flow Moderate 28KMH57 Round 0 Concrete 0 No Yes 4 ‐ Extreme0 ‐ No NA NA 0 ‐ No NA NA 0 ‐ No Yes 2 0.4 0 7.54 11.6 Enterococci 2200 No 28KSDO386 SDO 5/11/2020 No Yes No No Sunny 52 > 48 hours <0.1 in. 9:01 AM Manhole Flow Moderate 100 0 100 None Clear Clear None None CH69097 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA 0 ‐ No Yes 3 2 0 7.03 Outside Range 11.7 Outside Range Enterococci 10 No 28KSDO61 SDO 5/11/2020 No Yes Yes Yes Sunny 52 > 48 hours <0.1 in. 9:01 AM Manhole Flow Moderate 0 20 None Clear Clear None None 28KMH63 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA 0 ‐ No Yes 2 0.4 0 7.52 16896 12 9.9 Enterococci 2600 No 28LCSO012 CSO 5/14/2020 No Yes Yes Yes Sunny 62 > 48 hours <0.1 in. 11:47 AM Outfall Flow Moderate 0 10 SaltWater Clear Clear None None Unknown Concrete No No 0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etching spotty, 1/16 in. to 1/ 0 ‐ No Yes 0.25 0.6 0.12 7.43 11080 21.2 4.9 Enterococci 110 No 28LCSO019 CSO 5/11/2020 No Yes Yes Yes Sunny 57 > 48 hours <0.1 in. 9:01 AM Outfall Flow Moderate 5 10 None Clear Clear None None Yes 3 0.1 0 7.35 Outside Range 14.6 Outside Range Enterococci 10 No 28LSDO073 SDO 5/11/2020 No Yes No No Sunny 55 > 48 hours <0.1 in. 9:01 AM Manhole Dry None 100 0 100 None 28LMH78 Round 0 Unknown 0 No No NA NA NA NA NA NA NA NA No No Flow 28LSDO074/28LSDO075/28LSSDO 5/11/2020 No Yes Yes Yes Sunny 55 > 48 hours <0.1 in. 9:01 AM Outfall Flow Heavy 0 15 None Clear Clear None None Yes 2 0.1 0 7.41 Outside Range 12.1 Outside Range Enterococci 4000 No 28LSDO077 SDO 5/11/2020 No Yes No No Sunny 55 > 48 hours <0.1 in. 9:01 AM Outfall CNL No Other Could not locate outfall or upstream features. 28NSDO156 SDO 5/11/2020 No Yes Yes Yes Sunny 58 > 48 hours <0.1 in. 9:01 AM Outfall Dry None 0 0 No No Flow 28NSDO207 SDO 5/11/2020 Yes Yes Yes Yes Sunny 62 > 48 hours <0.1 in. 9:01 AM Outfall Flow Moderate 0 10 None Clear Clear None None Yes 3 0.3 0 7.78 17410 15.5 Outside Range Enterococci 40 No 28OSDO25 SDO 5/26/2020 No Yes Yes Yes Sunny 58 > 48 hours <0.1 in. 8:36 AM Outfall Flow Moderate 0 5 SaltWater Clear Clear None None Yes 2 0.1 0 8.17 Outside Range 14.6 Outside Range Enterococci 10 No 28PSDO1 SDO 5/11/2020 No Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 9:01 AM Outfall Flow Slow 0 10 None Clear Clear None None Yes 1 4 0 8.39 2130 13.9 1.1 Enterococci 14000 No 29JCSO017 CSO 5/18/2020 No Yes Yes Yes Cloudy 55 > 48 hours <0.1 in. 3:17 AM Manhole StandingWater None 100 5 100 SaltWater Clear Cloudy None None 29JMH222 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA No StandingWater 29JSDO029 SDO 5/26/2020 No Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 8:36 AM Outfall Dry None 0 0 None None No No Flow 29JSDO129 SDO 5/26/2020 No Yes Yes Yes Sunny 62 > 48 hours <0.1 in. 8:36 AM Outfall Flow Slow 0 1 Musty Clear Cloudy None None Yes 2 0 0 8.72 Outside Range 14.5 Outside Range Enterococci 40 No 29JSDO212 SDO 5/18/2020 Yes Yes Yes Yes Cloudy 55 > 48 hours <0.1 in. 3:17 AM Manhole Flow Slow 90 5 95 SaltWater Clear Cloudy None Other Benthic grow29JMH208 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 2 0.6 0 7.29 18620 15.3 Outside Range Enterococci 48000 No 29MCSO013 CSO 5/14/2020 Yes Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 11:47 AM Outfall Flow Moderate 0 5 None Clear Clear None None Yes 2 0.6 0 8.75 9760 14.2 5.5 Enterococci 20 No 29MSDO049 SDO 5/14/2020 No Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 11:47 AM Outfall Flow Moderate 45 50 None Clear Clear None Sediments Yes 3 0 0 8.08 Outside Range 14.2 Outside Range Enterococci 20 No 29NCSO014 CSO 5/26/2020 No Yes Yes Yes Sunny 58 > 48 hours <0.1 in. 8:36 AM Outfall Flow Slow 50 55 SaltWater Clear Cloudy None Sediments Yes 3 0.2 0 8 Outside Range 14.3 Outside Range Enterococci 10 No 29NSDO015 SDO 5/14/2020 No Yes Yes Yes Sunny 62 > 48 hours <0.1 in. 11:47 AM Outfall Flow Slow 0 1 SaltWater Clear Clear None None Yes 3 0 0 8.8 Outside Range 13.9 Outside Range Enterococci 10 No 29NSDO135 SDO 5/14/2020 No Yes Yes Yes Sunny 61 > 48 hours <0.1 in. 11:47 AM Outfall Flow Slow 0 2 None Clear Clear None None Yes 2 0.2 0 8.65 10810 14.12 6.2 Enterococci 10 No 29OSDO001 SDO 5/14/2020 No Yes No No Sunny 63 > 48 hours <0.1 in. 11:47 AM Manhole Flow Slow 100 0 100 None 29OMH161 Yes 1.5 2 0 7.88 3650 15.6 1.6 Enterococci 130 No 29PSDO005 SDO 5/11/2020 No Yes Yes Yes Sunny 59 > 48 hours <0.1 in. 9:01 AM Manhole Dry None None Sediments 29PMH78 Round 0 PVC 0 No No 1 ‐ Min: <1g0 ‐ No NA NA NA NA NA NA No No Flow Both inlets dry 29PSDO44 SDO 5/11/2020 No Yes Yes Yes Sunny 60 > 48 hours <0.1 in. 9:01 AM Outfall Flow Slow 0 10 None Clear Clear None None Yes 2 0 0 8.86 4710 13.1 2.5 Enterococci 70 No 30JSDO19 SDO 5/14/2020 Yes Yes Yes Yes Sunny 52 > 48 hours <0.1 in. 11:47 AM Outfall Dry None 0 0 None No No Flow 30JSDO30 SDO 5/14/2020 No Yes No No Sunny 56 > 48 hours <0.1 in. 11:47 AM Manhole Flow Slow 100 0 100 None 30JMH27 Yes 1.5 2 0 8.71 9350 12.5 5.2 Enterococci 60 No 30JSDO6 SDO 5/14/2020 No Yes Yes Yes Sunny 56 > 48 hours <0.1 in. 11:47 AM Outfall Flow Moderate 0 5 None Clear Clear None None Yes 3 0.3 0 8.15 Outside Range 11.9 Outside Range Enterococci 10 No 30PSDO107 SDO 5/11/2020 No Yes Yes Yes Sunny 53 > 48 hours <0.1 in. 9:01 AM Manhole Flow Slow 50 0 50 Garbage None 30PMH106 Round 0 Concrete 0 No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0.75 0 0 8.47 1538 12.2 0.7 Enterococci 60 No 30PSDO62 SDO 5/11/2020 No Yes No No Sunny 52 > 48 hours <0.1 in. 9:01 AM Manhole Flow Slow 100 0 100 30PMH60 Yes 1.5 0.8 0 8.54 1197 12.5 0.6 Enterococci 330 No 31OSDO4 SDO 5/11/2020 No Yes No No Sunny 53 > 48 hours <0.1 in. 9:01 AM Manhole Flow Moderate 31OMH13 Yes 0.5 0.2 0 9.08 1121 13.8 0.5 Enterococci 30 No 31PSDO84 SDO 5/11/2020 Yes Yes Yes Yes Sunny 52 > 48 hours <0.1 in. 9:01 AM Outfall Flow Moderate 0 15 None Clear Clear None None Yes 2 0.4 0 8.23 Outside Range 12.1 Outside Range Enterococci 10 No TABLE 2. WET WEATHER SCREENING RESULTS JANUARY 1, 2020 THROUGH DECEMBER 31, 2020 Bar Screen If Sediment Depth Other Bar Screen Head Wall Rip Rap Rip Rap Tide Gate Other Bacteria Bacteria Inspection Outfall Tidal Outfall Outfall Air Time Since Time Low Sampling If Flow Other Other Other Deposits Manhole Other Pipe Pipe Other Pipe Needs Needs Pipe End Pipe End Broken Broken Samples Bacteria Bacteria Facility ID Location Type Weather Quantity Rain24h Is There Flow Submerged Depth Water plus Odor Color Turbidity Floatables Deposits Pipe Shape Needs Corroded Pit Debris Broken Broken If No Reason Reason No Surfactants Ammonia Chlorine pH Conductivity Temperature Salinity Comments Duplicate Duplicate Date Sign Impact Located Accessible Temp F Last Rain Tide Location Velocity Odor Color Floatables Stains Facility ID Shape Material Material Repair Cleaning Debris Collapsed Missing Collected Type Result Percent percent Sed percent Stains Cleared Spall Deposition Missing Missing Sample Sample Collect Sample Result Deter 01ESDO24 SDO 11/30/2020 No No Yes Yes Raining 60 < 24 Hours 0.1 in. to 0.25 in. Outfall Flow Moderate 25 75 None Clear Clear None Sediments Concrete No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0 0.1 0 6.83 42 12.4 0 E.coli 390 No 01FSDO31 SDO 11/23/2020 No No No No Cloudy 49 < 24 Hours >= 0.25 in. Manhole Flow Slow 1FMH21 Yes 0.25 0.4 0 6.47 99.7 13.4 0 E.coli 5100 No 02ESDO5 SDO 2/26/2020 No No Yes Yes Cloudy 45 < 48 hours >= 0.25 in. Outfall Flow Slow 0 0 None Clear Clear None None 8CMH355 Round 0 Other Unknown No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.25 0 0 8.12 354 8.8 0.2 E.coli 20 No 02FMH120 Interconnection 11/23/2020 Manhole Flow None 0 30 None Clear Clear None None Yes 0 0.1 0 6.76 61.1 14.1 0 E.coli 910 No 02FSDO85 SDO 11/23/2020 No No No No Raining 48 < 24 Hours >= 0.25 in. Manhole Flow Moderate 100 0 100 None Clear Cloudy None 2FMH84 PVC No No 4 ‐ Extreme: >5 NA NA NA NA NA NA NA Yes 0.25 0.2 0 6.6 44 14 0 E.coli 230 No 02FSDO93 SDO 11/30/2020 No No No No Raining 54 < 24 Hours 0.1 in. to 0.25 in. Manhole Submerged None 100 2FMH70, 2FMH74 No Standing Water 03ESDO185 SDO 2/26/2020 Yes No Yes Yes Cloudy 45 < 48 hours >= 0.25 in. Outfall Flow Slow 25 40 None Clear Clear None None 5FMH36 Round 0 Concrete 0 No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0.25 0.2 0 7.77 610 8.4 0.3 E.coli 70 No 03ESDO186 SDO 11/23/2020 No No No No Raining 49 < 24 Hours >= 0.25 in. Manhole Standing Water None 3EMH92 No Standing Water 03ESDO207 SDO 11/24/2020 No No Yes Yes Sunny 36 > 24 Hours >= 0.25 in. Outfall Dry None 0 0 None Concrete No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 1 ‐ Min: 1‐2 br NA No No Flow 04ESDO64 SDO 11/24/2020 No No Yes Yes Sunny 36 > 24 Hours >= 0.25 in. Outfall Dry None 0 0 Concrete No No 0 ‐ No 0 ‐ No NA NA NA 0 ‐ No 0 ‐ No 0 ‐ No No No Flow 04FMH90 Interconnection 2/26/2020 Manhole Flow Slow 1 2 None Clear Clear None Sediments 4FMH90 Yes 0.5 0.1 0 8.1 1609 8.6 0.8 E.coli 120 No 04FSDO1 SDO 11/24/2020 No No Yes Yes Sunny 50 < 24 Hours >= 0.25 in. Outfall Dry None 0 0 VC No No 0 ‐ No 0 ‐ No NA NA NA NA NA No No Flow 04FSDO119 SDO 11/24/2020 No No Yes Yes Sunny 50 < 24 Hours >= 0.25 in. Manhole Flow Slow 100 0 100 3FMH21 Concrete No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0.25 0 0 6.5 1317 6.7 0.6 E.coli 2400 No 04FSDO16 SDO 11/30/2020 No No No No Raining 53 < 24 Hours 0.1 in. to 0.25 in. Manhole Flow Moderate 4FMH15 Yes 0.75 0.8 0.47 6.67 151.1 12.9 0 E.coli 3300 No 04FSDO189 SDO 2/26/2020 Yes No Yes Yes Cloudy 45 < 48 hours >= 0.25 in. Manhole Flow Slow 40 0 50 None Clear Clear None None 5FMH36 Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.5 0.3 0 8.23 364 9.4 0.2 Proceeded upstrE.coli 160 No 04FSDO203 SDO 3/19/2020 No No Yes Yes Raining 42 < 48 hours >= 0.25 in. Outfall Flow Slow 0 2 None Clear Clear None None Other Rounded squa Concrete 0 No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 0 0 8.05 91.4 11.3 0 E.coli 10 No 05CSDO110 SDO 11/30/2020 No No Yes Yes Raining 54 < 24 Hours 0.1 in. to 0.25 in. Outfall Flow Moderate 0 10 None Clear Cloudy None None Concrete No Yes 2 ‐ Mod: 1‐3gal 0 ‐ No 4 ‐ Yes 0 ‐ No 1 ‐ Min: etchingNA NA NA Yes 0.25 0.1 0 7.37 1111 12.1 0.5 E.coli 1600 No 05ESDO180 SDO 2/26/2020 Yes No Yes Yes Cloudy 43 < 48 hours >= 0.25 in. Outfall Flow Slow 0 1 None Clear Clear None Sediments 12FMH41 Round 0 Concrete 0 No 1 ‐ Min: etc0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etchingNA NA NA Yes 0 0 0 7.84 809 9.9 0.4 E.coli 20 No 05ESDO181 SDO 11/30/2020 Yes No Yes Yes Raining 54 < 24 Hours 0.1 in. to 0.25 in. Catch Basin Flow Moderate 90 100 None Clear Clear Other Leafs None 5ECB6 Concrete No Yes 3 ‐ Maj: 3‐5gal b0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.25 0.2 0 7.3 340 11.7 0.2 E.coli 5300 No 05ESDO182 SDO 11/30/2020 No No Yes Yes Raining 55 < 24 Hours 0.1 in. to 0.25 in. Manhole Flow Heavy 5 60 None Clear Clear None None 5EMH152 Concrete No No 1 ‐ Min: <1gal b0 ‐ No NA NA NA NA NA NA Yes 0 0.1 0 7.02 81.4 12.9 0.01 E.coli 1200 No 05ESDO183 SDO 11/30/2020 Yes No Yes Yes Raining 54 < 24 Hours 0.1 in. to 0.25 in. Outfall Flow Slow 75 100 None Brown Cloudy None None Concrete No Yes 3 ‐ Maj: 3‐5gal b0 ‐ No NA 0 ‐ No 1 ‐ Min: etchingNA NA NA Yes 0.25 2 0 6.85 137.6 12.2 0.01 E.coli 4500 No 05ESDO184 SDO 2/26/2020 No No Yes Yes Cloudy 45 < 48 hours >= 0.25 in. Outfall Flow Slow 15 90 None Clear Clear None None 13EMH166 Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 1.4 0 0 8 2130 8.6 1.1 E.coli 20 No 05FSDO244 SDO 11/30/2020 Yes No Yes Yes Raining 54 < 24 Hours 0.1 in. to 0.25 in. Manhole Submerged None 60 2 62 None Clear Clear None None 4FMH70 Concrete No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA No Standing Water 05FSDO245 SDO 11/30/2020 Yes No Yes Yes Raining 55 < 24 Hours 0.1 in. to 0.25 in. Manhole Flow Moderate 85 0 85 None Clear Cloudy None None 5FMH212 VC No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.5 0.2 0 6.46 902 14.8 0.4 E.coli 3500 No 05FSDO253 SDO 2/26/2020 No No No No Cloudy 45 < 48 hours >= 0.25 in. Manhole Flow Slow 5FMH289 Yes 0 0 0 7.79 1375 10.7 0.7 E.coli 170 No 05FSDO254 SDO 2/26/2020 No No Yes Yes Cloudy 45 < 48 hours >= 0.25 in. Outfall Flow Slow 0 0 None Clear Clear None None 4FMH200 Round 0 VC 0 No NA 0 ‐ No 3 ‐ Yes, Broken NA NA NA 0 ‐ No NA NA Yes 0.25 0 0 8.19 2600 8.6 0.01 E.coli 20 No 05GSDO112 SDO 3/13/2020 No No No No Raining 50 < 48 hours >= 0.25 in. Manhole Flow Moderate 6GMH63 Yes 0.75 0.8 0 7.57 480 10.8 0.2 E.coli 240 No 05GSDO115 SDO 3/13/2020 No No Yes Yes Raining 50 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 5 None Grey Cloudy None None Round 0 VC 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA Yes 1.5 2 0 7.94 968 8.2 0.4 E.coli 390 No 05GSDO116 SDO 3/13/2020 No No Yes Yes Raining 50 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 2 None Grey Cloudy None None Round 0 Other Lined VC No NA 0 ‐ No 3 ‐ Yes, Broken NA NA NA NA NA NA Yes 2 3 0 7.88 2520 10.9 1.3 E.coli 1200 No 06CMH117 Interconnection 11/23/2020 Manhole Flow Heavy 0 70 None Clear Clear None None Yes 0.25 0.1 0 7.33 79 15 0 E.coli 1900 No 06DMH97 Interconnection 11/23/2020 Manhole Flow Moderate 0 10 None Clear Clear None None Yes 0 0.2 0 7.13 154.6 15.8 0 E.coli 33000 No 06DSDO184 SDO 11/24/2020 Yes No Yes Yes Cloudy 34 <24 Hours >= 0.25 in. Outfall Cannot Locate None No Other CNL outfall. Appears to be a culvert Outfall appears to be a culvert with no connected storm drain infrastructure 06DSDO83 SDO 11/24/2020 Yes No Yes Yes Cloudy 38 < 24 Hours >= 0.25 in. Outfall Dry None 0 0 None None Concrete No No 1 ‐ Min: <1gal b0 ‐ No NA 0 ‐ No 1 ‐ Min: etchingNA NA NA No No Flow 06DSDO84 SDO 11/24/2020 No No No No Cloudy 38 < 24 Hours >= 0.25 in. Manhole Dry None 100 6DMH82 No No Flow could not locate outfall possibly submerged 06DSDO85 SDO 11/24/2020 Yes No Yes Yes Sunny 38 < 24 Hours >= 0.25 in. Manhole Dry None 40 10 40 None None None 6DMH88 Concrete No No 0 ‐ No 0 ‐ No NA NA 2 ‐ Mod: generaNA NA NA No No Flow 06DSDO86 SDO 11/24/2020 No No Yes Yes Sunny 38 < 24 Hours >= 0.25 in. Catch Basin Standing Water None 100 0 100 None None None Concrete No No 1 ‐ Min: <1gal b0 ‐ No NA NA 2 ‐ Mod: generaNA NA NA No Standing Water 06DSDO91 SDO 11/24/2020 Yes No Yes Yes Cloudy 34 < 24 Hours >= 0.25 in. Outfall Submerged None 100 15 100 None Sediments Concrete No No 1 ‐ Min: <1gal b0 ‐ No NA NA 0 ‐ No NA NA NA No Other Outfall submerged. Standing water at the upstream 06FSDO233 SDO 3/13/2020 No No Yes Yes Raining 54 < 48 hours >= 0.25 in. Outfall Flow Slow 0 50 None Clear Clear None None Unknown 0 Concrete 0 No NA 2 ‐ Mod: 1‐3gal 3 ‐ Yes, Broken NA NA NA NA NA NA Yes 0.75 0.2 0 7.61 71 12.3 0 E.coli 370 No 06GSDO110 SDO 2/26/2020 No No Yes Yes Cloudy 45 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 5 None Clear Clear None None Round 0 Concrete 0 0 NA NA NA NA NA NA NA NA NA Yes 0.25 0 0 7.25 1502 9.2 0.7 E.coli 180 No 06GSDO166 SDO 3/13/2020 Yes No Yes Yes Raining 52 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 5 None Clear Clear None None Unknown 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA Yes 1.5 0.2 0 7.94 568 8.4 0.2 E.coli 220 No 06HSDO106 SDO 3/13/2020 No No Yes Yes Raining 50 < 48 hours >= 0.25 in. Manhole Flow Moderate 0 0 None 6HMH28 Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA Yes 0.5 0.4 0 7.88 919 10.8 0.4 E.coli 440 No 06HSDO107 SDO 3/13/2020 Yes No Yes Yes Raining 50 < 48 hours >= 0.25 in. Manhole Flow Moderate 5 5 Sediments 6HMH18 Round 0 Metal 0 No 0 ‐ No 2 ‐ Mod: 1‐3gal 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No Yes 1 0.8 0 7.9 1017 9.4 0.5 E.coli 350 No 07CSDO006 SDO 11/23/2020 No No Yes Yes Raining 57 < 24 Hours >= 0.25 in. Manhole Flow Moderate 50 1 50 None Clear Clear None None 7CMH11 No No Yes 1.5 4 0 6.59 561 15.4 0 E.coli >80000 No 07HSDO347 SDO 2/27/2020 No No Yes Yes Cloudy 50 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 1 Musty Clear Cloudy Garbage Sediments Round 0 Concrete 0 No NA 1 ‐ Min: <1gal b0 ‐ No 4 ‐ Yes 1 ‐ Min: broke NA 1 ‐ Min: <1gal b1 ‐ Min: 1‐2 br NA Yes 0.5 0.4 0 8.12 119 7.9 0 E.coli 5600 No 07HSDO348 SDO 2/27/2020 No No Yes Yes Cloudy 50 < 48 hours >= 0.25 in. Outfall Flow Slow 75 76 Musty Clear Cloudy Garbage Sediments Round 0 Concrete 0 No 0 ‐ No 1 ‐ Min: <1gal b0 ‐ No 4 ‐ Yes 0 ‐ No 0 ‐ No 1 ‐ Min: <1gal b0 ‐ No NA Yes 0.5 0.6 0 8.35 139 7.9 0 E.coli 470 No 08BSDO122 SDO 11/23/2020 Yes No Yes Yes Raining 57 < 24 Hours >= 0.25 in. Outfall Flow Heavy 0 25 Rotten Eggs Clear Clear None None Concrete No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0 0.1 0 7.03 53 12 0 E.coli 570 No 08BSDO126 SDO 11/23/2020 No No Yes No Raining 57 < 24 Hours >= 0.25 in. Manhole Flow Moderate 100 0 100 None Clear Clear None None 8BMH37 Concrete No No 0 ‐ No 0 ‐ No NA NA NA NA NA Yes 0 0 0 6.81 93.5 13.4 0 Sampled from u E.coli 230 No 08CSDO25 SDO 2/26/2020 No No Yes Yes Cloudy 45 < 48 hours >= 0.25 in. Manhole Flow Moderate 10 75 None Sediments 8CMH355 Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0 0.1 0 7.91 476 9.1 0.2 E.coli 30 No 08CSDO26 SDO 2/26/2020 No No Yes Yes Cloudy 45 < 48 hours >= 0.25 in. Manhole Flow Moderate 10 75 None Sediments 8CMH355 Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0 0.1 0 8.09 490 10.4 0.2 E.coli 10 No 08ESDO33 SDO 11/30/2020 Yes No Yes Yes Raining 59 < 24 Hours 0.1 in. to 0.25 in. Outfall Flow Moderate 0 15 Musty Grey Cloudy None None PVC No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0 0.4 0 7.04 162 12 0 E.coli 530 No 08FSDO1 SDO 11/24/2020 No No Yes Yes Sunny 41 < 24 Hours >= 0.25 in. Manhole Flow Slow 25 50 None Sediments 8FMH344 Concrete No No 1 ‐ Min: <1gal b0 ‐ No NA NA NA NA NA NA Yes 0 0 0 6.95 279 12.1 0.1 E.coli 70 No 08ISDO153 SDO 12/1/2020 Yes No Yes Yes Cloudy 60 < 24 Hours >= 0.25 in. Outfall Dry None 0 0 None No No Flow 08ISDO155 SDO 2/27/2020 Yes No Yes Yes Raining 50 < 48 hours >= 0.25 in. Outfall Flow Slow 0 1 None Clear Cloudy None None Other Unknown Concrete 0 No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 0.1 0 8.11 365 9.4 0.2 E.coli 700 No 08ISDO158 SDO 2/27/2020 Yes No Yes Yes Raining 50 < 48 hours >= 0.25 in. Outfall Flow Slow 0 2 None Clear Clear None None Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 1 ‐ Min: 1‐2 br NA Yes 0 0 0 7.89 171 11.2 0 E.coli 450 No 08ISDO207 SDO 2/27/2020 Yes No Yes Yes Cloudy 50 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 5 None Clear Clear None None Round 0 Concrete 0 No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0.5 0.1 0 7.61 555 9.2 0.3 E.coli 2800 No 08ISDO209 SDO 2/27/2020 Yes No Yes Yes Cloudy 52 < 48 hours >= 0.25 in. Outfall Flow Slow 0 2 None Clear Clear None None Other Unknown Unknown 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0 0 0 7.91 117 10.1 0 E.coli 2100 No 08JSDO102 SDO 2/27/2020 No Yes Yes Yes Cloudy 52 < 48 hours >= 0.25 in. 7:30 AM Outfall Flow Moderate 0 5 None Clear Clear None None Other Box Other Stone Culve No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 0.2 0 8.02 163 8.8 0 Enterococci 9000 No 08JSDO41 SDO 2/27/2020 No No Yes Yes Raining 50 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 5 None Clear Clear None None Round 0 Other Unknown No NA NA NA NA NA NA NA NA NA Yes 0 0 0 7.91 101 9.3 0 E.coli 2600 No 08KSDO49 SDO 2/27/2020 Yes No Yes Yes Raining 50 < 48 hours >= 0.25 in. Outfall Flow Slow 0 1 None Clear Clear None None Round 0 VC 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA Yes 0.25 0.1 0 8.06 183 9 0 E.coli 9000 No 09BSDO49 SDO 11/23/2020 No No Yes Yes Raining 52 < 24 Hours >= 0.25 in. Outfall Flow Moderate 5 10 None Clear Clear None None Concrete No No 1 ‐ Min: <1gal b0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No NA NA NA Yes 0 0 0 6.92 19 10 0 E.coli 720 No 09ESDO229 SDO 11/30/2020 No No No No Raining 57 < 24 Hours 0.1 in. to 0.25 in. Manhole Flow Moderate 9EMH191 Yes 0 0.2 0 6.62 90 12.8 0 E.coli 33000 No 09KSDO100 SDO 2/27/2020 No Yes Yes Yes Raining 46 < 48 hours >= 0.25 in. 7:30 AM Manhole Flow Slow 100 0 100 None Sediments 9KMH64 Unknown 0 Concrete 0 No 0 ‐ No 1 ‐ Min: <1gal b0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.25 0.4 0 8.3 1126 10.5 0.5 Enterococci 4000 No 09KSDO16 SDO 2/27/2020 No No No No Raining 50 < 48 hours >= 0.25 in. Manhole Flow Slow 8KMH41 Yes 0.1 0 0 7.9 197 8.6 0 E.coli 4000 No 10BSDO15 SDO 11/23/2020 Yes No Yes Yes Raining 52 < 24 Hours >= 0.25 in. Outfall Flow Heavy 100 100 None Clear Clear None None Concrete No No NA NA NA NA 0 ‐ No NA NA NA Yes 0 0.3 0.1 687 377 10 0.2 Outfall sign is m E.coli 2500 No 11BMH49 Interconnection 11/23/2020 Manhole Dry None 0 0 None None No No Flow 11BSDO123 SDO 11/23/2020 No No No No Raining 51 < 24 Hours >= 0.25 in. Manhole Flow Slow 100 0 100 None None 11BMH43 Yes 0 0 0 6.99 100.8 11.8 0 E.coli 6000 No 11GSDO344 (11GMH246) SDO 11/24/2020 No No No No Sunny 41 < 24 Hours >= 0.25 in. Manhole Dry None 11GMH244 No No Flow 11GSDO344 (11GMH247) SDO 11/24/2020 No No No No Sunny 41 < 24 Hours >= 0.25 in. Manhole Standing Water None 11GMH249 No Standing Water 12BSDO10 SDO 11/23/2020 Yes No No No Raining 51 < 24 Hours >= 0.25 in. Catch Basin Submerged None 100 0 100 None None No Standing Water Outfall under bridged, could not access. Standing water at the upstream CB 12BSDO124 SDO 11/23/2020 No No Yes Yes Raining 48 < 24 Hours >= 0.25 in. Outfall Flow Slow 0 90 None Clear Clear None None Concrete No No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 0.25 0.4 0 6.03 122.1 13 0 E.coli 34000 No 12BSDO14 SDO 11/23/2020 Yes No No No Raining 51 > 24 Hours >= 0.25 in. Manhole Submerged None 100 0 100 None None No Standing Water Outfall under bridged, could not access. Standing water all the upstream ma 12BSDO33 SDO 2/26/2020 No No No No Cloudy 48 < 48 hours >= 0.25 in. Manhole Flow Moderate 12BMH32 Yes 0.5 0 0 7.32 407 9.2 0.2 E.coli 10 No 12ESDO418 SDO 2/26/2020 No No Yes Yes Cloudy 49 < 48 hours >= 0.25 in. Manhole Flow Moderate 50 None Sediments 12FMH41 Round 0 Metal 0 No NA 0 ‐ No 0 ‐ No 0 ‐ No 0 ‐ No NA NA NA NA Yes 0.5 0.6 0 8.08 955 7.5 0.4 E.coli 910 No 12FSDO305 SDO 2/27/2020 No No Yes Yes Cloudy 48 < 48 hours >= 0.25 in. Manhole Flow Moderate 20 70 None Grey Cloudy None None 12FMH70 Round 0 PVC 0 No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 0.1 0 7.91 592 8.7 0.3 E.coli 580 No 12HSDO1 (12HMH26) SDO 12/1/2020 No No No No Cloudy 63 < 24 Hours >= 0.25 in. Manhole Standing Water None 12HMH24 No Standing Water 12HSDO1 (12HMH27) SDO 12/1/2020 No No No No Cloudy 63 < 24 Hours >= 0.25 in. Manhole Standing Water None 12HMH29 No Standing Water 12HSDO92 SDO 2/26/2020 No No Yes Yes Cloudy 49 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 100 None Green Cloudy None Sediments 8KMH41 Round 0 Other Unknown No NA NA NA NA NA NA NA NA NA Yes 0 1 0 7.73 698 8.3 0.3 E.coli 30 No 12LMH374 Interconnection 11/23/2020 Manhole Flow Moderate 0 75 Musty Clear Clear None None Yes 0 0.1 0 6.92 234 15.1 0.1 E.coli 9000 No 13BSDO11 SDO 2/26/2020 Yes No Yes Yes Cloudy 48 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 99 None Clear Clear None None 12EMH146 Round 0 Other Unknown No NA NA NA NA NA NA NA NA NA Yes 0.75 0 0 7.1 2600 9 1.4 E.coli 10 No 13BSDO11 SDO 11/23/2020 Yes No Yes Yes Raining 52 < 24 Hours >= 0.25 in. Outfall Flow Moderate 100 100 None Clear Clear None None Other Unknown No No NA NA NA NA NA NA NA NA Yes 0 0.2 0 7.12 84 11.4 0 Outfall completeE.coli 1200 No 13DSDO078 SDO 2/26/2020 Yes No Yes Yes Cloudy 49 < 48 hours >= 0.25 in. Outfall Flow Slow 25 50 None Clear Clear None Sediments 5FMH289 Round 0 Concrete 0 No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 0 0 7.91 645 8.01 0.3 E.coli 2500 No 13ESDO175 SDO 2/27/2020 Yes No Yes Yes Cloudy 48 < 48 hours >= 0.25 in. Outfall Flow Slow 25 75 None Clear Clear None None Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA Yes 0 0.1 0 8.01 388 8.7 0.2 E.coli 2600 Yes 2600 13ESDO176 SDO 2/27/2020 No No Yes Yes Cloudy 46 < 48 hours >= 0.25 in. Manhole Flow Slow 80 10 80 None Clear Clear None None 12EMH146 Round 0 Unknown 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA Yes 0.25 0.4 0 8 1731 10.2 0.9 E.coli 180 No 13FSDO11 SDO 2/26/2020 No No Yes Yes Cloudy 49 < 48 hours >= 0.25 in. Outfall Flow Moderate 10 25 None Clear Clear None Sediments 9KMH64 Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No 0 ‐ No 0 ‐ No NA Yes 0.5 0.1 0 8.1 783 7.9 0.4 E.coli 340 No 13FSDO95 SDO 11/30/2020 No No Yes Yes Raining 55 < 24 Hours 0.1 in. to 0.25 in. Outfall Flow Moderate 0 10 Musty Yellow Cloudy None None Concrete No No 0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etchingNA NA NA Yes 0 0.4 0 6.45 517 13.1 0.2 E.coli 100 No 13FSDO96 SDO 2/27/2020 No No Yes Yes Cloudy 46 < 48 hours >= 0.25 in. Outfall Flow Moderate 0 5 None Clear Clear None None Round 0 VC 0 No NA 0 ‐ No 0 ‐ No NA NA NA 3 ‐ Maj: 3‐5gal 0 ‐ No NA Yes 0.5 0.8 0 8.03 413 10.1 0.2 E.coli 3500 No 13FSDO97 SDO 2/27/2020 No No Yes Yes Cloudy 46 < 48 hours >= 0.25 in. Outfall Flow Slow 0 1 None Clear Clear None None Round 0 VC 0 No NA 1 ‐ Min: <1gal b0 ‐ No NA NA NA NA NA NA Yes 0.25 0.4 0 8 346 9.8 0.2 E.coli 770 No 14CSDO9 SDO 12/1/2020 Yes No Yes Yes Cloudy 61 < 24 Hours >= 0.25 in. Outfall Flow Slow 0 20 None Yellow Clear None None Concrete No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 2 0 6.68 263 14.7 0.1 E.coli 2900 No 14EMH36 Interconnection 2/27/2020 Manhole Flow Moderate 5 10 None Clear Clear None None 14EMH36 Yes 0.5 0.2 0 7.83 2960 7.8 1.5 E.coli 460 No 19GSDO199 SDO 12/1/2020 No No Yes Yes Cloudy 61 < 24 Hours >= 0.25 in. Catch Basin Standing Water None 100 25 100 None Clear Clear None None 19GCB14 Other Unknown No Yes 2 ‐ Mod: 1‐3gal 0 ‐ No NA NA NA NA NA NA No Standing Water 20DMH19 Interconnection 11/24/2020 Manhole Flow Heavy 0 15 Oil Clear Clear None None Yes 0.5 0.2 0 7.09 946 11.4 0.5 E.coli 7500 No 20DMH62 Interconnection 11/23/2020 Manhole Flow Moderate 0 2 None Clear Clear None None Yes 0 0.4 0 7.31 103.6 13.8 0 E.coli 19000 No 20GSDO163 SDO 11/23/2020 No No No Yes Raining 59 < 24 Hours >= 0.25 in. Manhole Flow Heavy 100 0 100 20GMH107 Yes 0 0 0 7.31 103.3 15.3 0 E.coli 120 No 20GSDO164 SDO 11/23/2020 No No No Yes Raining 59 < 24 Hours >= 0.25 in. Catch Basin Cannot Locate 100 0 100 20GCB125 No Other CNL, flooded Area completely flooded, CNL features. 21HSDO001 SDO 11/23/2020 No No No No Raining 61 < 24 Hours >= 0.25 in. Manhole Flow Slow 21HMH67 Yes 0 0.2 0 7.17 144.3 14.2 0 E.coli 360 No 21HSDO002 SDO 11/23/2020 No No No No Raining 61 < 24 Hours >= 0.25 in. Manhole Flow Moderate 21HMH45 Yes 0 0 0 7.42 155 13.3 0 E.coli 450 No 21KCSO070 CSO 5/12/2020 Yes Yes Yes Yes Sunny 45 < 48 hours >= 0.25 in. 9:54 AM Outfall Flow Slow 0 30 None Clear Clear None None Unknown 0 Concrete 0 No 1 ‐ Min: etc0 ‐ No 0 ‐ No NA NA 1 ‐ Min: etchingNA NA NA Yes 2 0.3 0 7.54 Outside Range14.2 Outside Range Enterococci 600 No 21NCSO80 CSO 5/12/2020 No Yes No No Sunny 45 < 48 hours >= 0.25 in. 9:54 AM Manhole Flow Slow 21NMH9 Yes 3 0 0 7.55 Outside Range10.8 Outside Range Enterococci 280 No 22CSDO384 SDO 11/30/2020 Yes No Yes Yes Raining 54 < 24 Hours 0.1 in. to 0.25 in. Outfall Flow Moderate 0 20 None Clear Clear None None Concrete No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 0 0 6.83 777 10.4 0.4 E.coli 100 No 22KCSO068 CSO 5/12/2020 Yes Yes Yes Yes Cloudy 46 < 48 hours >= 0.25 in. 9:54 AM Outfall Flow Moderate 10 50 SaltWater Clear Clear None None Round 0 Concrete 0 No NA 0 ‐ No 0 ‐ No NA NA NA 0 ‐ No 0 ‐ No NA Yes 0.75 1 0 8.89 6300 12.3 4.2 Enterococci 280 No 23HMH81 Interconnection 3/19/2020 Manhole StandingWater None None None None 23HMH81 No Standing Water West inlet observed dry, S inlet and outlet submerged. 23HSDO040 SDO 3/19/2020 No No No No Raining 43 < 48 hours 0.1 in. to 0.25 in. Manhole Flow Moderate 100 0 100 23HMH68 Yes 0 0.2 0 6.98 122.7 8.4 0 Sample collectedE.coli 730 No 23HSDO042 SDO 3/19/2020 No No No No Raining 43 < 48 hours >= 0.25 in. Manhole Standing Water None 100 23HMH131, 23HMH111 No Standing Water Outfall could not be located, likely 100% submerged. 23LCSO062 CSO 5/12/2020 No Yes Yes Yes Sunny 50 < 48 hours >= 0.25 in. 9:54 AM Outfall Flow Slow 10 35 None Clear Clear None Sediments Unknown 0 Concrete 0 No 2 ‐ Mod: ge0 ‐ No 0 ‐ No NA NA 2 ‐ Mod: genera0 ‐ No 0 ‐ No 0 ‐ No Yes 2 0.2 0 8.82 Outside Range11.3 Outside Range Enterococci 10 No 23LCSO064 CSO 5/12/2020 No Yes No No Sunny 50 < 48 hours >= 0.25 in. 9:54 AM Manhole Flow Moderate 100 23LMH92 Yes 2 0.2 0 8.26 Outside Range16 Outside Range Enterococci 180 No 24CSDO174 SDO 11/30/2020 No No Yes Yes Raining 57 < 24 Hours 0.1 in. to 0.25 in. Outfall Flow Moderate 0 5 None Yellow Clear None None VC No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0 0.4 0 6.98 373 6.9 0.2 E.coli 3100 No 24CSDO39 SDO 11/30/2020 No No No Raining 57 < 24 Hours 0.1 in. to 0.25 in. Manhole Flow Heavy 24CMH251 Yes 0.25 0.4 0 6.81 714 13 0.3 This mh is upstreE.coli 1900 No 24DSDO150 SDO 12/1/2020 Yes No Yes Yes Cloudy 63 < 24 Hours >= 0.25 in. Outfall Flow Heavy 0 2 None Clear Clear None Concrete No No 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0.25 0 0 6.86 3240 15.7 1.7 E.coli 30 No 24GSDO034 SDO 3/19/2020 No No No No Raining 43 < 48 hours 0.1 in. to 0.25 in. Manhole Flow Slow 100 0 100 25GMH5 Other Unknown Concrete 0 No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0.25 0.8 0 6.98 1144 8.7 0.6 E.coli 1300 No 25ESDO037 SDO 11/23/2020 No No Yes Yes Raining 48 < 24 Hours >= 0.25 in. Manhole Flow 100 25EMH131 Yes 0 0.1 0 7.72 117.1 12.9 0 E.coli 2300 No 25GSDO041 SDO 3/19/2020 Yes No Yes Yes Raining 43 < 48 hours >= 0.25 in. Outfall Flow Heavy 0 5 None Clear Clear None None Round 0 VC 0 No NA 2 ‐ Mod: 1‐3gal 0 ‐ No NA NA NA NA NA NA Yes 0.25 0.6 0 6.88 1882 9.7 0.9 Sample taken at E.coli 100 No 25MSDO007 SDO 11/24/2020 No Yes No Sunny 45 < 24 Hours >= 0.25 in. 12:41 PM Manhole Dry None 100 25MMH118 No No Flow Could not access outfall 26FSDO038 SDO 12/1/2020 No No No No Cloudy 58 < 24 Hours >= 0.25 in. Manhole Flow Slow 100 0 100 26FMH38 Yes 0 0.1 0 6.89 1160 10.3 0.6 Outfall 26FSDO0E.coli 30 No 26JSDO052 SDO 12/1/2020 No No Yes Yes Cloudy 61 < 24 Hours >= 0.25 in. Manhole Dry None 100 0 100 None Clear Cloudy None None 26JMH38 Concrete No No 0 ‐ No NA NA NA 0 ‐ No NA NA 0 ‐ No No No Flow 26KSDO050 SDO 3/19/2020 No Yes No No Raining 45 < 48 hours >= 0.25 in. 2:56 AM Manhole Flow Heavy 100 100 26KMH319 Round 0 Other Unknown No NA NA NA NA NA NA NA NA NA Yes 0 0 0 7.2 180.4 8 0 Bacteria sample Enterococci 180 No 26LSDO106 SDO 3/19/2020 No Yes No No Raining 46 < 48 hours >= 0.25 in. 2:56 AM Manhole Flow Slow 26LMH177 Round 0 Other Unknown No NA NA NA NA NA NA NA NA NA Yes 0.25 0.6 0 8.72 454 8.1 0.3 Enterococci 80000 No 27JSDO001 SDO 12/1/2020 No Yes No No Cloudy 66 < 24 Hours >= 0.25 in. 5:21 AM Manhole Standing Water None 100 100 27JMH17 No Standing Water 27JSDO044 SDO 12/1/2020 No Yes No No Cloudy 61 < 24 Hours >= 0.25 in. 5:21 AM Manhole Submerged None 100 100 27JMH46 No Standing Water Standing water. 27JSDO096 SDO 12/1/2020 No Yes No No Cloudy 61 < 24 Hours >= 0.25 in. Manhole Standing Water None 100 100 None 27JMH95 No Standing Water 28IMH15 Interconnection 11/24/2020 Manhole Standing Water None 0 100 Garbage None No Standing Water 28NSDO156 SDO 11/23/2020 No Yes Yes Yes Raining 54 < 24 Hours >= 0.25 in. 11:51 AM Outfall Flow Moderate 0 5 None Clear Clear None None Concrete No No 1 ‐ Min: <1gal b0 ‐ No NA NA NA NA NA NA Yes 0.25 0.1 0 7.8 90 14.4 0 Enterococci 2900 No 29JSDO029 SDO 5/12/2020 No Yes Yes Yes Sunny 52 < 48 hours >= 0.25 in. 9:54 AM Outfall Flow Slow 0 2 SaltWater Clear Clear None None Round 0 Concrete 0 No 0 ‐ No 0 ‐ No 0 ‐ No NA NA 0 ‐ No NA NA NA Yes 2 0.2 0 8.42 Outside Range11.2 Outside Range Enterococci 160 No 30PSDO107 SDO 5/12/2020 No Yes Yes Yes Sunny 52 < 48 hours >= 0.25 in. 9:54 AM Outfall Flow Slow 10 50 None Clear Cloudy Foam Sediments Round 0 Concrete 0 No NA 0 ‐ No 0 ‐ No NA NA NA NA NA NA Yes 0.75 0 0 8.89 1153 13.1 0.6 Enterococci 70 No Table 3. Sub‐Catchment Area Investigation Status by Manholes Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004)

Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November Reporting Period 7/1/2020 ‐ 12/31/2020 2004) Drain + % Total # Storm Manholes Investigated/Com Drain + Common Investigated/ plete by Sub‐Catchment Area¹ Area Type Manholes Completed² Manholes³ 01E024 SDO 12 12 100% 01F031 SDO 30 30 100% 02E086 (aka 02E005) SDO 9 9 100% 02F085 SDO 4 4 100% 02F093 SDO 6 6 100% 02F120 SDO 39 39 100% 03E185 SDO 61 61 100% 03E186 SDO 13 13 100% 04E064 SDO 3 3 100% 04E069 SDO 41 41 100% 04F016 SDO 17 17 100% 04F118 SDO 9 9 100% 04F119 SDO 15 15 100% 04F189 SDO 31 31 100% 04F204 SDO 74 74 100% 05E182 SDO 13 13 100% 05E183* SDO 0 0 100% 05E184 (aka 05E120) SDO 79 79 100% 05F117 SDO 52 52 100% 05F244 SDO 25 25 100% 05F245 SDO 28 28 100% 05F253 SDO 43 43 100% 05G112 SDO 27 27 100% 05G115 SDO 17 17 100% 05G116 SDO 25 25 100% 05G116A SDO 61 61 100% 06C110 (aka 05C110) SDO 55 55 100% 06D057 SDO 12 12 100% 06D085 SDO 2 2 100% 06D091* SDO 0 0 100% 06D187 SDO 81 81 100% 06F233* SDO 0 0 100% 06G108 SDO 189 189 100% 06G109 SDO 31 31 100% 06G110 SDO 46 46 100% 06G111 SDO 17 17 100% 06G165 SDO 6 6 100% 06G166 SDO 15 15 100% Table 3. Sub‐Catchment Area Investigation Status by Manholes Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004)

Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November Reporting Period 7/1/2020 ‐ 12/31/2020 2004) Drain + % Total # Storm Manholes Investigated/Com Drain + Common Investigated/ plete by Sub‐Catchment Area¹ Area Type Manholes Completed² Manholes³ 06H106 SDO 15 15 100% 06H107 SDO 17 17 100% 07C006 SDO 495 495 100% 07H105 SDO 486 486 100% 07H285 SDO 344 344 100% 07H346 SDO 5 5 100% 07H347 SDO 5 5 100% 07H348 SDO 10 10 100% 08B122 SDO 61 61 100% 08B126 SDO 22 22 100% 08C025/026 SDO 22 22 100% 08E031 SDO 65 65 100% 08E035 SDO 3 3 100% 08I153 SDO 4 4 100% 08I154 SDO 38 38 100% 08I155 SDO 3 3 100% 08I156 SDO 42 42 100% 08I158 SDO 16 16 100% 08I207 SDO 10 10 100% 08I209 SDO 6 6 100% 08J036/041 SDO 13 13 100% 08J050/049 SDO 77 77 100% 08J102 SDO 26 26 100% 08J103 SDO 32 32 100% 08K049 SDO 3 3 100% 09E229 SDO 2 2 100% 09K016 SDO 16 16 100% 09K100 SDO 26 26 100% 09K101 SDO 34 34 100% 09L095 SDO 29 29 100% 10B015 SDO 52 52 100% 10L094 SDO 849 849 100% 10L096 SDO 22 22 100% 11B123 SDO 132 132 100% 11BMH49 (DCR 11BSDO28) Interconnection (DCR) 12 12 100% 11G344 SDO 64 64 100% 11I577 SDO 1354 1354 100% 11M093 SDO 76 76 100% Table 3. Sub‐Catchment Area Investigation Status by Manholes Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004)

Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November Reporting Period 7/1/2020 ‐ 12/31/2020 2004) Drain + % Total # Storm Manholes Investigated/Com Drain + Common Investigated/ plete by Sub‐Catchment Area¹ Area Type Manholes Completed² Manholes³ 12B010* SDO 0 0 100% 12B014 SDO 4 4 100% 12B124 SDO 497 497 100% 12F305 SDO 13 13 100% 12F418 (aka 12E418) SDO 20 20 100% 12H085 SDO 17 17 100% 12L092 (B) SDO 163 163 100% 12LMH304 (DCR 13LSDO137) (B) Interconnection (DCR) 12 12 100% 12LMH374 (DCR 12LSDO296) (B) Interconnection (DCR) 38 38 100% 12M091 SDO 10 10 100% 13B011 SDO 4 4 100% 13D077/078 SDO 169 169 100% 13E174 SDO 74 74 100% 13E175 SDO 22 22 100% 13E176 SDO 5 5 100% 13F011 (aka 13F185) SDO 48 48 100% 13F012 (aka 13F093) SDO 9 9 100% 13L090 (B) SDO 982 982 100% 14C009 SDO 4 4 100% 14EMH36 Interconnection (Brookline) 6 6 100% 15F288 SDO 200 200 100% 15L088 (B) SDO 465 465 100% 15L089 (B) SDO 73 73 100% 16L097 SDO 23 23 100% 16L122 SDO 254 254 100% 17F012 SDO 5 5 100% 17M033 SDO 145 145 100% 18G233 SDO 87 87 100% 19G043 SDO 80 80 100% 19G194 SDO 58 58 100% 19G199 SDO 1 1 100% 19LCSO084DR CSO 13 13 100% 19LCSO085DR CSO 47 47 100% 19MCSO082DR CSO 8 8 100% 19MCSO083DR CSO 4 4 100% 19NCSO081DR CSO 10 10 100% 20DMH19 Interconnection (Brookline) 106 106 100% 20DMH62 Interconnection (Brookline) 15 15 100% Table 3. Sub‐Catchment Area Investigation Status by Manholes Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004)

Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November Reporting Period 7/1/2020 ‐ 12/31/2020 2004) Drain + % Total # Storm Manholes Investigated/Com Drain + Common Investigated/ plete by Sub‐Catchment Area¹ Area Type Manholes Completed² Manholes³ 20DNP140 (20DMH55) Interconnection (Brookline) 55 55 100% 20G161 SDO 62 62 100% 20G164* SDO 0 0 100% 21C212 SDO 15 15 100% 21DMH319 Interconnection (Brookline) 66 66 100% 21EMH64 Interconnection (Brookline) 83 83 100% 21EMH86 Interconnection (Brookline) 17 17 100% 21H047 SDO 145 145 100% 21K069 SDO 98 98 100% 21KCSO070DR CSO 369 369 100% 21LCSO076DR CSO 3 3 100% 21M010 SDO 17 17 100% 21M050 SDO 28 28 100% 21MCSO079DR CSO 1 1 100% 21NCSO080DR CSO 10 10 100% 22C384 SDO 13 13 100% 22KCSO065DR CSO 78 78 100% 22KCSO072DR CSO 11 11 100% 22L580 SDO 44 44 100% 22LCSO073DR CSO 44 44 100% 23BMH89 Interconnection (Newton) 11 11 100% 23G132 SDO 67 67 100% 23H040 SDO 23 23 100% 23H042 SDO 314 314 100% 23L074 SDO 5 5 100% 23L075 SDO 61 61 100% 23L164 SDO 37 37 100% 23L195 SDO 21 21 100% 23L196 SDO 15 15 100% 23L202 SDO 25 25 100% 23LCSO062DR CSO 4 4 100% 23LCSO064DR CSO 9 9 100% 24C174 SDO 54 54 100% 24CMH014 (24CSDO039) SDO 16 16 100% 24D032 SDO 1037 1037 100% 24D150 SDO 6 6 100% 24G034 SDO 73 73 100% 24G035 SDO 338 338 100% Table 3. Sub‐Catchment Area Investigation Status by Manholes Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004)

Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November Reporting Period 7/1/2020 ‐ 12/31/2020 2004) Drain + % Total # Storm Manholes Investigated/Com Drain + Common Investigated/ plete by Sub‐Catchment Area¹ Area Type Manholes Completed² Manholes³ 24L233 SDO 58 58 100% 24LCSO060DR CSO 58 58 100% 24NCSO003DR CSO 740 740 100% 25D040 SDO 27 27 100% 25E037 SDO 424 424 100% 25G041 SDO 19 19 100% 25L058 SDO 157 157 100% 25L144 SDO 5 5 100% 25LCSO057 CSO 14 14 100% 25M006 SDO 19 19 100% 25M007 SDO 25 25 100% 25MCSO005DR CSO 0 0 100% 26F038 SDO 34 34 100% 26G001 SDO 198 198 100% 26J049 SDO 157 157 100% 26J052 SDO 2 2 100% 26J055 (aka 26JSDO101) SDO 20 20 100% 26K035 SDO 48 48 100% 26K050 SDO 23 23 100% 26K052 SDO 1 1 100% 26K099 SDO 206 206 100% 26K254 SDO 7 7 100% 26L055 (aka 26LSDO106) SDO 4 4 100% 26L070 SDO 6 6 100% 26L084 SDO 6 6 100% 26LCSO009 CSO 24 24 100% 27J001 SDO 140 140 100% 27J096 SDO 191 191 100% 27L020/22 SDO 91 91 100% 27LCSO010 CSO 17 17 100% 28IMH15 Interconnection (Somerville 9 9 100% 28K010 SDO 26 26 100% 28K061 SDO 98 98 100% 28K386 SDO 5 5 100% 28L073 SDO 1 1 100% 28L074/076 SDO 92 92 100% 28LCSO012DR CSO 16 16 100% 28LCSO019 CSO 12 12 100% Table 3. Sub‐Catchment Area Investigation Status by Manholes Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004)

Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November Reporting Period 7/1/2020 ‐ 12/31/2020 2004) Drain + % Total # Storm Manholes Investigated/Com Drain + Common Investigated/ plete by Sub‐Catchment Area¹ Area Type Manholes Completed² Manholes³ 28N156 (B) SDO 3 3 100% 28N207 (B) SDO 82 82 100% 28O025 (B) SDO 22 22 100% 28P001 (B) SDO 9 9 100% 29J129 SDO 6 6 100% 29J212 SDO 166 166 100% 29JCSO017 CSO 12 12 100% 29M049 SDO 22 22 100% 29MCSO013DR CSO 12 12 100% 29N015 SDO 11 11 100% 29N135 SDO 9 9 100% 29O001 (B) SDO 282 282 100% 29P044 (B) SDO 11 11 100% 2FMH120 (DCR 2FSDO99) Interconnection (DCR) 11 11 100% 30J006 SDO 20 20 100% 30J019 SDO 10 10 100% 30J030 SDO 23 23 100% 30P062 SDO 11 11 100% 30P107 SDO 11 11 100% 31O004 SDO 32 32 100% 31P084 SDO 17 17 100% 3FMH56 (DCR 3FSDO159) Interconnection (DCR) 27 27 100% 4FMH90 (DCR 3FSDO162) Interconnection (DCR) 20 20 100% 6DMH97 Interconnection (Dedham) 189 189 100% Stony Brook‐Lower (21HCSO046) CSO 521 521 100% Stony Brook‐Middle (‐SB areas) CSO 1851 1851 100% Stony Brook‐Upper SDO 3158 3158 100% 03E207* SDO 0 0 100% 04F001* SDO 0 0 100% 04F203 SDO 1 1 100% 05E180* SDO 0 0 100% 05E181* SDO 0 0 100% 05F254 SDO 1 1 100% 6CMH117 Interconnection (Dedham) 9 9 100% 06D083 SDO 1 1 100% 06D084 SDO 4 4 100% 06D086* SDO 0 0 100% 06D184 SDO 2 2 100% Table 3. Sub‐Catchment Area Investigation Status by Manholes Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004)

Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November Reporting Period 7/1/2020 ‐ 12/31/2020 2004) Drain + % Total # Storm Manholes Investigated/Com Drain + Common Investigated/ plete by Sub‐Catchment Area¹ Area Type Manholes Completed² Manholes³ 09B049 SDO 1 1 100% 09E243 SDO 35 35 100% 12B033 SDO 3 3 100% 12H087 SDO 38 38 100% 12H092 SDO 80 80 100% 13F095 SDO 2 2 100% 13F096 SDO 2 2 100% 13F097* SDO 0 0 100% 18LCSO086DR CSO 14 14 100% 20G163 SDO 13 13 100% 21H048 SDO 3 3 100% 21MCSO078DR CSO 0 0 100% 22KCSO068DR CSO 28 28 100% 23HMH81 (DCR 23ISDO019) Interconnection (DCR) 4 4 100% 23L015 SDO 30 30 100% 24L022 (aka 23LSDO022) SDO 13 13 100% 25NCSO004DR CSO 23 23 100% 27J044 SDO 6 6 100% 28L077* SDO 0 0 100% 29J029* SDO 0 0 100% 29NCSO014DR CSO 1 1 100% 29P005 SDO 3 3 100% ¹(B) indicates a highest priority beach area; * indicates that there are no storm drain or common manholes located in the sub‐catchment area. ²Total number of manholes investigated/completed is based on a manual review process which analyzes the number of manholes that fall within areas designated as complete, therefore it includes manholes that are inferred to be void of contamination based on downstream manhole inspections and/or dye tests. ³The % complete estimate to date is calculated as the total number of storm drain and common manholes investigated/completed to date divided by the total number of storm drain and common manholes within each drainage area. Table 4. Sub‐Catchment Area Investigation Status by Storm Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004) Drain Pipe Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November 2004) Reporting Period 7/1/2020 ‐ 12/31/20

Total Linear Feet % Investigated/ Total Linear of Storm Drain Completed by Feet of Storm Pipe Investigated/ Storm Drain Sub‐Catchment Area¹ Area Type Drain Pipe Completed² Pipe³ 01E024 SDO 2,155 2,155 100% 01F031 SDO 5,710 5,710 100% 02E086 (aka 02E005) SDO 2,334 2,334 100% 02F085 SDO 682 682 100% 02F093 SDO 991 991 100% 02F120 SDO 7,389 7,389 100% 03E185 SDO 10,917 10,917 100% 03E186 SDO 2,051 2,051 100% 04E064 SDO 253 253 100% 04E069 SDO 8,768 8,768 100% 04F016 SDO 2,134 2,134 100% 04F118 SDO 1,294 1,294 100% 04F119 SDO 2,569 2,569 100% 04F189 SDO 4,938 4,938 100% 04F204 SDO 14,453 14,453 100% 05E182 SDO 2,445 2,445 100% 05E183* SDO 58 58 100% 05E184 (aka 05E120) SDO 11,125 11,125 100% 05F117 SDO 7,703 7,703 100% 05F244 SDO 3,043 3,043 100% 05F245 SDO 4,254 4,254 100% 05F253 SDO 6,757 6,757 100% 05G112 SDO 3,671 3,671 100% 05G115 SDO 1,853 1,853 100% 05G116 SDO 3,623 3,623 100% 05G116A SDO 11,234 11,234 100% 06C110 (aka 05C110) SDO 9,579 9,579 100% 06D057 SDO 2,418 2,418 100% 06D085 SDO 236 236 100% 06D091* SDO 63 63 100% 06D187 SDO 11,280 11,280 100% 06F233* SDO 49 49 100% 06G108 SDO 30,068 30,068 100% 06G109 SDO 4,716 4,716 100% 06G110 SDO 6,695 6,695 100% 06G111 SDO 4,292 4,292 100% 06G165 SDO 807 807 100% 06G166 SDO 2,201 2,201 100% Table 4. Sub‐Catchment Area Investigation Status by Storm Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004) Drain Pipe Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November 2004) Reporting Period 7/1/2020 ‐ 12/31/20

Total Linear Feet % Investigated/ Total Linear of Storm Drain Completed by Feet of Storm Pipe Investigated/ Storm Drain Sub‐Catchment Area¹ Area Type Drain Pipe Completed² Pipe³ 06H106 SDO 2,278 2,278 100% 06H107 SDO 2,453 2,453 100% 07C006 SDO 81,391 81,391 100% 07H105 SDO 73,303 73,303 100% 07H285 SDO 61,129 61,129 100% 07H346 SDO 705 705 100% 07H347 SDO 519 519 100% 07H348 SDO 743 743 100% 08B122 SDO 11,538 11,538 100% 08B126 SDO 3,474 3,474 100% 08C025/026 SDO 3,152 3,152 100% 08E031 SDO 10,096 10,096 100% 08E035 SDO 899 899 100% 08I153 SDO 425 425 100% 08I154 SDO 5,740 5,740 100% 08I155 SDO 399 399 100% 08I156 SDO 5,764 5,764 100% 08I158 SDO 1,963 1,963 100% 08I207 SDO 1,400 1,400 100% 08I209 SDO 820 820 100% 08J036/041 SDO 2,439 2,439 100% 08J050/049 SDO 12,006 12,006 100% 08J102 SDO 3,447 3,447 100% 08J103 SDO 6,382 6,382 100% 08K049 SDO 513 513 100% 09E229 SDO 322 322 100% 09K016 SDO 2,062 2,062 100% 09K100 SDO 4,330 4,330 100% 09K101 SDO 5,245 5,245 100% 09L095 SDO 4,789 4,789 100% 10B015 SDO 7,123 7,123 100% 10L094 SDO 127,791 127,791 100% 10L096 SDO 2,893 2,893 100% 11B123 SDO 20,303 20,303 100% 11BMH49 (DCR 11BSDO28) Interconnection (DCR) 2,130 2,130 100% 11G344 SDO 9,122 9,122 100% 11I577 SDO 238,332 238,332 100% 11M093 SDO 9,956 9,956 100% Table 4. Sub‐Catchment Area Investigation Status by Storm Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004) Drain Pipe Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November 2004) Reporting Period 7/1/2020 ‐ 12/31/20

Total Linear Feet % Investigated/ Total Linear of Storm Drain Completed by Feet of Storm Pipe Investigated/ Storm Drain Sub‐Catchment Area¹ Area Type Drain Pipe Completed² Pipe³ 12B010* SDO 16 16 100% 12B014 SDO 717 717 100% 12B124 SDO 80,035 80,035 100% 12F305 SDO 2,175 2,175 100% 12F418 (aka 12E418) SDO 3,052 3,052 100% 12H085 SDO 2,963 2,963 100% 12L092 (B) SDO 25,084 25,084 100% 12LMH304 (DCR 13LSDO137) (B) Interconnection (DCR) 1,617 1,617 100% 12LMH374 (DCR 12LSDO296) (B) Interconnection (DCR) 4,151 4,151 100% 12M091 SDO 1,238 1,238 100% 13B011 SDO 772 772 100% 13D077/078 SDO 27,404 27,404 100% 13E174 SDO 11,097 11,097 100% 13E175 SDO 4,331 4,331 100% 13E176 SDO 863 863 100% 13F011 (aka 13F185) SDO 6,716 6,716 100% 13F012 (aka 13F093) SDO 1,828 1,828 100% 13L090 (B) SDO 154,041 154,041 100% 14C009 SDO 822 822 100% 14EMH36 Interconnection (Brookline) 991 991 100% 15F288 SDO 29,831 29,831 100% 15L088 (B) SDO 79,592 79,592 100% 15L089 (B) SDO 13,671 13,671 100% 16L097 SDO 2,973 2,973 100% 16L122 SDO 40,954 40,954 100% 17F012 SDO 1,157 1,157 100% 17M033 SDO 15,162 15,162 100% 18G233 SDO 12,689 12,689 100% 19G043 SDO 11,554 11,554 100% 19G194 SDO 9,044 9,044 100% 19G199 SDO 230 230 100% 19LCSO084DR CSO 1,766 1,766 100% 19LCSO085DR CSO 5,550 5,550 100% 19MCSO082DR CSO 1,283 1,283 100% 19MCSO083DR CSO 535 535 100% 19NCSO081DR CSO 2,039 2,039 100% 20DMH19 Interconnection (Brookline) 18,600 18,600 100% 20DMH62 Interconnection (Brookline) 1,542 1,542 100% Table 4. Sub‐Catchment Area Investigation Status by Storm Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004) Drain Pipe Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November 2004) Reporting Period 7/1/2020 ‐ 12/31/20

Total Linear Feet % Investigated/ Total Linear of Storm Drain Completed by Feet of Storm Pipe Investigated/ Storm Drain Sub‐Catchment Area¹ Area Type Drain Pipe Completed² Pipe³ 20DNP140 (20DMH55) Interconnection (Brookline) 8,749 8,749 100% 20G161 SDO 7,913 7,913 100% 20G164* SDO 73 73 100% 21C212 SDO 2,494 2,494 100% 21DMH319 Interconnection (Brookline) 9,847 9,847 100% 21EMH64 Interconnection (Brookline) 11,041 11,041 100% 21EMH86 Interconnection (Brookline) 3,263 3,263 100% 21H047 SDO 18,874 18,874 100% 21K069 SDO 14,839 14,839 100% 21KCSO070DR CSO 50,657 50,657 100% 21LCSO076DR CSO 818 818 100% 21M010 SDO 4,053 4,053 100% 21M050 SDO 4,070 4,070 100% 21MCSO079DR CSO 174 174 100% 21NCSO080DR CSO 552 552 100% 22C384 SDO 2,193 2,193 100% 22KCSO065DR CSO 8,188 8,188 100% 22KCSO072DR CSO 549 549 100% 22L580 SDO 5,861 5,861 100% 22LCSO073DR CSO 7,859 7,859 100% 23BMH89 Interconnection (Newton) 1,807 1,807 100% 23G132 SDO 9,997 9,997 100% 23H040 SDO 3,379 3,379 100% 23H042 SDO 49,657 49,657 100% 23L074 SDO 624 624 100% 23L075 SDO 8,734 8,734 100% 23L164 SDO 3,305 3,305 100% 23L195 SDO 2,899 2,899 100% 23L196 SDO 1,397 1,397 100% 23L202 SDO 2,434 2,434 100% 23LCSO062DR CSO 82 82 100% 23LCSO064DR CSO 1,227 1,227 100% 24C174 SDO 12,066 12,066 100% 24CMH014 (24CSDO039) SDO 2,236 2,236 100% 24D032 SDO 160,361 160,361 100% 24D150 SDO 872 872 100% 24G034 SDO 13,437 13,437 100% 24G035 SDO 56,096 56,096 100% Table 4. Sub‐Catchment Area Investigation Status by Storm Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004) Drain Pipe Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November 2004) Reporting Period 7/1/2020 ‐ 12/31/20

Total Linear Feet % Investigated/ Total Linear of Storm Drain Completed by Feet of Storm Pipe Investigated/ Storm Drain Sub‐Catchment Area¹ Area Type Drain Pipe Completed² Pipe³ 24L233 SDO 5,504 5,504 100% 24LCSO060DR CSO 5,154 5,154 100% 24NCSO003DR CSO 92,876 92,876 100% 25D040 SDO 5,390 5,390 100% 25E037 SDO 64,936 64,936 100% 25G041 SDO 2,794 2,794 100% 25L058 SDO 15,960 15,960 100% 25L144 SDO 619 619 100% 25LCSO057 CSO 1,219 1,219 100% 25M006 SDO 2,198 2,198 100% 25M007 SDO 3,629 3,629 100% 25MCSO005DR CSO 0 0 100% 26F038 SDO 7,803 7,803 100% 26G001 SDO 36,612 36,612 100% 26J049 SDO 20,940 20,940 100% 26J052 SDO 559 559 100% 26J055 (aka 26JSDO101) SDO 2,094 2,094 100% 26K035 SDO 4,792 4,792 100% 26K050 SDO 2,336 2,336 100% 26K052 SDO 303 303 100% 26K099 SDO 23,733 23,733 100% 26K254 SDO 1,096 1,096 100% 26L055 (aka 26LSDO106) SDO 451 451 100% 26L070 SDO 670 670 100% 26L084 SDO 616 616 100% 26LCSO009 CSO 2,476 2,476 100% 27J001 SDO 18,240 18,240 100% 27J096 SDO 15,671 15,671 100% 27L020/22 SDO 12,358 12,358 100% 27LCSO010 CSO 2,960 2,960 100% 28IMH15 Interconnection (Somerville) 1,207 1,207 100% 28K010 SDO 4,212 4,212 100% 28K061 SDO 14,489 14,489 100% 28K386 SDO 997 997 100% 28L073 SDO 242 242 100% 28L074/076 SDO 13,535 13,535 100% 28LCSO012DR CSO 3,279 3,279 100% 28LCSO019 CSO 1,367 1,367 100% Table 4. Sub‐Catchment Area Investigation Status by Storm Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004) Drain Pipe Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November 2004) Reporting Period 7/1/2020 ‐ 12/31/20

Total Linear Feet % Investigated/ Total Linear of Storm Drain Completed by Feet of Storm Pipe Investigated/ Storm Drain Sub‐Catchment Area¹ Area Type Drain Pipe Completed² Pipe³ 28N156 (B) SDO 376 376 100% 28N207 (B) SDO 11,631 11,631 100% 28O025 (B) SDO 2,428 2,428 100% 28P001 (B) SDO 1,826 1,826 100% 29J129 SDO 1,478 1,478 100% 29J212 SDO 23,313 23,313 100% 29JCSO017 CSO 611 611 100% 29M049 SDO 4,237 4,237 100% 29MCSO013DR CSO 1,541 1,541 100% 29N015 SDO 1,297 1,297 100% 29N135 SDO 1,460 1,460 100% 29O001 (B) SDO 47,076 47,076 100% 29P044 (B) SDO 2,508 2,508 100% 2FMH120 (DCR 2FSDO99) Interconnection (DCR) 2,748 2,748 100% 30J006 SDO 2,148 2,148 100% 30J019 SDO 1,084 1,084 100% 30J030 SDO 3,145 3,145 100% 30P062 SDO 1,841 1,841 100% 30P107 SDO 2,018 2,018 100% 31O004 SDO 4,791 4,791 100% 31P084 SDO 2,974 2,974 100% 3FMH56 (DCR 3FSDO159) Interconnection (DCR) 4,749 4,749 100% 4FMH90 (DCR 3FSDO162) Interconnection (DCR) 4,638 4,638 100% 6DMH97 Interconnection (Dedham) 29,408 29,408 100% Stony Brook‐Lower (21HCSO046) CSO 72,563 72,563 100% Stony Brook‐Middle (‐SB areas) CSO 271,072 271,072 100% Stony Brook‐Upper SDO 515,603 515,603 100% 03E207* SDO 0 0 100% 04F001* SDO 0 0 100% 04F203 SDO 78 78 100% 05E180* SDO 99 99 100% 05E181* SDO 52 52 100% 05F254 SDO 210 210 100% 6CMH117 Interconnection (Dedham) 720 720 100% 06D083 SDO 200 200 100% 06D084 SDO 694 694 100% 06D086* SDO 64 64 100% 06D184 SDO 149 149 100% Table 4. Sub‐Catchment Area Investigation Status by Storm Work done during CWI1, CWI2, CWI3 and/or CWI4 (since November 2004) Drain Pipe Sub‐Catchment Area Investigations Completed No work done during CWI1, CWI2, CWI3 or CWI4 (since November 2004) Reporting Period 7/1/2020 ‐ 12/31/20

Total Linear Feet % Investigated/ Total Linear of Storm Drain Completed by Feet of Storm Pipe Investigated/ Storm Drain Sub‐Catchment Area¹ Area Type Drain Pipe Completed² Pipe³ 09B049 SDO 135 135 100% 09E243 SDO 6,318 6,318 100% 12B033 SDO 729 729 100% 12H087 SDO 6,747 6,747 100% 12H092 SDO 21,371 21,371 100% 13F095 SDO 205 205 100% 13F096 SDO 117 117 100% 13F097* SDO 0 0 100% 18LCSO086DR CSO 2,143 2,143 100% 20G163 SDO 1,433 1,433 100% 21H048 SDO 968 968 100% 21MCSO078DR CSO 0 0 100% 22KCSO068DR CSO 2,996 2,996 100% 23HMH81 (DCR 23ISDO019) Interconnection (DCR) 439 439 100% 23L015 SDO 3,977 3,977 100% 24L022 (aka 23LSDO022) SDO 2,096 2,096 100% 25NCSO004DR CSO 3,838 3,838 100% 27J044 SDO 3,425 3,425 100% 28L077* SDO 602 602 100% 29J029* SDO 553 553 100% 29NCSO014DR CSO 371 371 100% 29P005 SDO 211 211 100% ¹(B) indicates a highest priority beach area; * indicates that there are no storm drain or common manholes located in the sub‐ catchment area.

²Total linear feet of pipe investigated/completed is based on a manual review process which analyzes the number of manholes that fall within areas designated as complete, therefore it includes manholes that are inferred to be void of contamination based on downstream manhole inspections and/or dye tests. If a pipe segment falls partially within an area designated as complete and partially within and area designated as incomplete, the entire length of pipe is considered to be incomplete.

³The % complete estimate to date is calculated as the total linear feet of storm drain pipe investigated/completed to date divided by the total linear feet of storm drain pipe within each drainage area. Table 5. Verified Illicit Discharges ‐ Direct Connections Reporting Period 7/1/20 ‐ 12/31/20

If Not Sewage Bldg Days to Corrected‐ Removed BWSC Status Address Bldg Type Sub‐Catchment Area Subwatershed Date Verified Date Corrected Number Correct Days (gallons per Cost* Outstanding day(gpd)) Corrected by BWSC 530 Dorchester Avenue Apts 21KCSO070 Boston Harbor via Fort Point Channel 10/16/2020 12/10/2020 55 77 $17,239

Corrected by BWSC 291‐303A Huntington Avenue Restaurant 21IMH539 Charles via Stony Brook Conduit 01/21/2020 11/7/2020 290 3,275 $5,610

Corrected by BWSC 32 Prince Street R‐2 15F288 Arboretum Charles River (Stony Brook Conduit, Goldsmith Brook) 06/26/2020 8/24/2020 59 161 $18,249

Post Correction Inspection Planned 265 East Cottage Street R‐2 16L122 Boston Harbor 04/30/2019 611

Included Under BWSC Contract 542 Dorchester Avenue Apts 21KCSO070 Boston Harbor via Fort Point Channel 12/08/2017 1119

Included Under BWSC Contract 30 Gay Head Street R‐3 18HMH271SB Charles via Stony Brook Conduit 03/12/2018 1025

Included Under BWSC Contract 32 Gay Head Street R‐2 18HMH271SB Charles via Stony Brook Conduit 09/18/2019 470

Owner will be renotified 256 Marginal Street Comm 25M006 Boston Harbor 08/05/2019 514

Owner is pursuing correction 29‐31 South Street R‐2 15GMH208SB Charles via Stony Brook Conduit 08/29/2019 490

Owner will be renotified 480 Truman Parkway R‐1 06G165 Metropolitan Neponset River 02/28/2019 672

Illicit Connection was Corrected Total Sewage Removed (gpd) 3,513

Reported Corrected BWSC Cost to Correct Illicit Connection** $41,098

Correction of Illicit Connection is Pending

**Costs do not include costs for manhole inspections or dye tests used to locate the illicit discharges Table 6. Verified Illicit Discharges ‐ Leaking Laterals Reporting Period 7/1/20‐12/31/20

If Not Sewage BWSC Cost BWSC Bldg Bldg Sub‐Catchment Date Days to Corrected‐ Removed To Test Status Address Subwatershed Date Verified Reimbursed Number Type Area Corrected Correct Days (gallons per Lateral for to Owner Outstanding day (gpd)) Leaking

Lateral Repaired by Owner 16 Chilcott Place R‐2 16HMH26SB Charles via Stony Brook Conduit 10/04/2019 4/24/2020 203 107 $1,956 $3,950

Lateral Repaired by Owner 40 Hampstead Road R‐2 14GMH130SB Charles via Stony Brook Conduit 03/11/2020 12/11/2020 275 58 $1,934 $4,000

Verified Leaking Lateral ‐ Owner has Been Notified 382 Centre Street R‐2 18HMH271SB Charles via Stony Brook Conduit 08/17/2018 867

Verified Leaking Lateral ‐ Owner has Been Notified 36 Dalrymple Street R‐4‐6 17HMH106SB Charles via Stony Brook Conduit 09/19/2019 469

Verified Leaking Lateral ‐ Owner has Been Notified 62 Harold Street R‐2 18HMH200SB Charles via Stony Brook Conduit 11/19/2019 408

Verified Leaking Lateral ‐ Owner has Been Notified 51 Mendum Street R‐1 12ESDO418 Unamed Wetlands 11/28/2018 764

Leaking Lateral Was Repaired Total Sewage Removed (gpd) 165 Repair of Lateral is Pending BWSC Cost to Plug Test Lateral to Verify Leakage* $3,890 Total BWSC Cost to Reimburse Owners* $7,950 Total BWSC Cost to Verify Leaking Laterals and Reimburse Owners* $11,840 *Costs do not include costs for manhole inspections or dye tests used to locate the illicit discharges Table 7. Sewage Removed by Sub-Catchment Area Reporting Period 7/1/20-12/31/20

Cumulative to 8/1/12- 2/1/13- 8/1/13- 2/1/14- 8/1/14- 1/1/15- 8/1/15- 1/1/16- 7/1/16- 1/1/17- 7/1/17- 1/1/18- 7/1/18- 1/1/19- 7/1/19- 1/1/20- 7/1/20- Sub-Catchment Area Date for Sub- 1/31/13 7/30/13 1/31/14 7/30/14 12/31/14 7/30/15 12/31/15 6/30/16 12/31/16 6/30/17 12/31/17 6/30/18 12/31/18 6/30/19 12/31/19 6/30/20 12/31/20 Catchment 03E185 Norton Street 43 54 97 04F191 Faraday 58 60 118 04F204 Chittick 57 55 343 455 05F117 Williams 3,246 3,246 05F245 Hyde Park Ave 117 117 05F112 Water St 790 790 06C110 Pleasantdale 150 150 06D097 Edgemere 167 147 314 06D187 Grove Street 1,145 64 10 33 1,252 06G108 Wood Avenue 143 55 63 162 124 272 819 07C006 Belle Avenue 43 56 32 13 253 152 17 566 07H105 Edgewater 60 162 75 157 117 517 280 102 173 40 1,683 07H285 Blue Hill Ave 553 216 231 36 901 78 114 845 91 3,065 08B122 Spring St 86 113 270 469 08B126 Spring Street 10 10 08E031 Turtle Pond 66 18 84 08I156 Mamelon 191 191 08J103 Central Ave. 36 36 09K101 Huntoon 137 137 10B015 53 53 10L094 Davenport 209 214 1,322 619 829 180 3,373 11B123 Baker St 245 56 236 83 34 60 714 11I577 Dorchester 9,071 147 259 766 493 198 218 4,210 788 463 228 148 213 236 1,096 18,534 12B124 LaGrange 127 123 77 90 32 141 11 103 17 126 847 12L092 Pine Neck Creek 149 149 13E174 VFW 366 278 95 22 761 13F011 Allandale 38 38 13D077/078 30 76 391 837 281 69 45 1,729 13F093 Walter St 98 98 13L090 Victory Road 13,136 181 494 143 202 984 68 9,484 24,692 15F288 Arboretum 301 166 267 335 161 1,230 15L088 Freeport Way 508 129 61 698 16L097 187 187 16L122 484 190 91 765 18G233 Daisy Field 270 19 289 19G043 Huntington 265 88 247 1,293 1,893 20D019 37 2,143 2,180 20G161 Brookline Ave 223 223 21D319 Village-Kilsyth 179 602 188 145 1,114 21E064 Tannery 87 113 1,161 1,040 2,401 21K069 650 3,010 631 528 4,819 21KCSO070 15,723 385 249 477 62 10,785 2,147 18,578 1,644 77 50,127 21KCSO072 23 23 23B089 87 57 144 23H042 415 8,256 68 8,739 23I023 Stony Brook Conduit 957 1,714 631 147 280 8,462 280 359 66 14,815 5,494 521 5,516 259 3,440 42,941 23L064 29,620 29,620 24D032 Faneuil Brook 224 604 1,195 603 688 1,375 385 1,119 181 278 579 152 91 59 7,533 24G035 Salt Creek 250 762 43 680 461 918 3,114 24NCSO003 758 758 25D040 Western Ave 269 240 509 25E037 Telford 36 519 6 1,145 59 77 385 115 103 2,445 25L058 518 518 26G001 Harvard 363 363 27J001 72 72 27L020/022 UNK 0 28K10 20 20 28N207 Moore Street 240 17 27 27 94 405 28P001 Nancia 91 37 128 29J212 Medford St. 441 441 29O001 Constitution 256 312 131 121 4,301 5,121 29P015 Barnes 19 19 29P044 Shawsheen 31 85 213 329 CSO BOS004 Overflow Unk 0 CSO MWRA 24J220 126 126 Total Sewage Removed (gpd) 13,561 18,505 8,536 36,999 3,670 29,637 7,979 11,763 6,372 3,317 1,757 27,663 9,442 29,554 19,925 1,523 3,678 during Compliance Period: Total Sewage Removed (gpd) 233,881 Cummulative to Date: Table 8. Sewage Removed by Sub-Watershed Area Reporting Period 7/1/20-12/31/20

Sewage Removed 8/1/12- 2/1/13- 8/1/13- 2/1/14- 8/1/14- 1/1/15- 8/1/15- 1/1/16- 7/1/16- 1/1/17- 7/1/17- 1/1/18- 7/1/18- 1/1/19- 7/1/19- 1/1/20- 7/1/20- (average gallons Sub-Watershed Area 1/31/13 7/30/13 1/31/14 7/30/14 12/31/14 7/30/15 12/31/15 6/30/16 12/31/16 6/30/17 12/31/17 6/30/18 12/31/18 6/30/19 12/31/19 6/30/20 12/31/20 per day) per Sub- watershed Area Boston Harbor 669 1,136 414 32,974 148 16,381 4,686 249 1,583 0 62 10,805 2,905 5,324 2,044 128 77 79,585

Charles River 1,654 1,043 2,080 1,410 1,794 3,174 1,717 4,264 2,538 2,017 950 1,012 776 22,764 2,373 0 161 49,727

Charles via Stony Brook Conduit 9,394 1,861 966 1,279 773 9,149 218 4,210 1,242 833 482 15,001 5,761 1,114 5,752 1,355 3,440 62,830

Mystic River 441 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 441

Neponset River 1,403 14,465 5,076 1,336 955 933 1,358 3,040 1,009 467 263 845 0 352 9,756 40 0 41,298 Total Sewage Removed (gallons per 13,561 18,505 8,536 36,999 3,670 29,637 7,979 11,763 6,372 3,317 1,757 27,663 9,442 29,554 19,925 1,523 3,678 day) per Compliance Period: Total Sewage Removed (gallons per 233,881 day) Cummulative to Date: Table 9. Verified Direct Connections >60 Days and >90 Days to Correct‐Enforcement Actions and Schedule for Correction Reporting Period 7/1/20 ‐ 12/31/20

If Not Schedule Previous Bldg Date Days to Corrected‐ Date(s) of Status Address Bldg Type Sub‐Catchment Area Subwatershed Date Verified Previously Schedule Comments Number Corrected Correct Days Legal Action Established? Met? Outstanding Charles via Stony Brook Corrected by BWSC 291‐303A Huntington Avenue Restaurant 21IMH539 01/21/2020 11/7/2020 290 No NA NA Correction was delayed due to Covid Pandemic shutdown. Conduit This is believed to be corrected. Access for confirmation dye test was delayed due to Covid Post Correction Inspection is Planned 265 East Cottage Street R‐2 16L122 Boston Harbor 04/30/2019 611 Yes No NA pandemic restricting access for an internal dye test. Post correction inspection will be conducted during the next reporting period. Correction was originally delayed while adjacent bldgs were dye tested to determine whether any others connected to the same drain. Lateral connects downstream of regulator, is very deep, and there are utilities restricting access. Previously evaluated whether redirection of the building's internal plumbing to discharge to sewer located at rear of bldg might be an option. That option Boston Harbor via Fort Included Under BWSC Contract 542 Dorchester Avenue Apts 21KCSO070 12/08/2017 1119 Yes No NA was determined to be infeasible. In 2020 action was delayed due to Covid pandemic and then the Point Channel contractor refused to make the correction due the utilities restricting access. In 11/2020 Commission notified the contractor in writing that in accordance with their contract they are still required to make the correction. Commission will follow up with notification or enforcement with the contractor as necessary. Correction will be completed during the next Reporting Period.

Initially correction was delayed because it was determined that a wet well, pump and force main would be necessary and there is little space in building and on street to install necessary appurtenances. Owner is responsible for paying for the corrective work on private property. Although owner is eligible for $7,500 reimbursement from Commission the correction is expected to cost substantially more. In 2018 and 2019 Commission pursued progressive enforcement against 10/3/18; the owner but owner reported having much difficulting in getting any contractors to respond to her Charles via Stony Brook 12/4/18; Included Under BWSC Contract 30 Gay Head Street R‐3 18HMH271SB 03/12/2018 1025 Yes No requests for quotes. Subsequently it was found there was also an illicit connection at 32 Gay Head Conduit 1/7/19; Street. In the first Reporting Period in 2020 Commission was evaluating whether construction of a 4/19/19; new sewer on Gay Head to serve the two properties would be a feasible option. Then action was delayed in 2020 due to the Covid Pandemic. In the latter part or 2020 the Commission determined that installing a new sewer is not feasible. Commission is currently evaluating remaining options. If necessary Commission will renotify owner and pursue enforcement as warranted. Evaluation and correction will be completed during the next Reporting Period.

Originally believed an ejector pump would be needed to make the correction. Since 30 Gay Head Street was also illicit in early 2020 Commission considered installing a new sewer on Gay Head Street to serve both properties. Then action in 2020 was delayed due to Covid Pandemic. In the Charles via Stony Brook latter part of 2020 Commission determined that installing a new sewer is not feasible. The location Included Under BWSC Contract 32 Gay Head Street R‐2 18HMH271SB 09/18/2019 470 Yes No NA Conduit has been referred to the Commission's new illicit connection correction contractor to make the correction in the street, although it may still be necessary for the owner to install an ejector pump. If so owner will be notified and enforcement pursued accordingly. Correction will be completed during the next Reporting Period. 8/5/19; Owner was required to correct by 1/4/20. Final Notice and Demand was issued 1/21/20; owner 11/5/19; contacted Commission to request more guidance regarding location of internal illicit. Then site visit Owner will be renotified 256 Marginal Street Comm 25M006 Boston Harbor 08/05/2019 514 Yes No 12/6/19 was delayed due to Covid pandemic. Follow‐up will resume during next Reporting Period and a 12/17/19; new enforcement will be issued. Correction will be made during the next Reporting Period. 1/21/20 City street access permit was received 9/24/19; excavation permit was requested 10/2/19 and received 10/7/19. Owner did not respond to several requests for access to inspect. Then follow up was delayed due to Covid Pandemic. Finally access was gained and it was determined that internal 7/16/20; Charles via Stony Brook plumbing work by owner is necessary in order to correct. Commission has been pursuing Owner is pursuing correction 29‐31 South Street R‐2 15GMH208SB 08/29/2019 490 Yes No 10/9/20; Conduit progressive enforcement. Owner is eligible for $7,500 from Commission for internal plumbing 11/20/20; work. In November owner had received quotes from plumbers and reimbursement request was approved by Commission. As of end of 2020 owner had signed a contract with a plumber. Correction will be made during the next Reporting Period. Dye showed in septic system then in an unmapped catch basin upstream of outfall 6GSDO165. Owner was originally scheduled to correct by 5/30/19. It is questionable whether the septic has a leaching field; if not, one will have to be installed or else connection to Commission's sewer system will be necessary. Nearest sewer is 240 linear feet away and a force main may be necessary. It is 2/28/19; the owner's responsibility to correct the illicit. Although the owner may be eligible for $7,500 Owner will be renotified 480 Truman Parkway R‐1 06G165 Metropolitan Neponset River 02/28/2019 672 Yes No 4/30/19 reimbursement from the Commission the correction is expected to cost substantially more than that. The owner is elderly and has limited income. Enforcement was suspended in 2019 while the owner pursued financial assisstance. In 2020 follow‐up was delayed due to Covid Pandemic. A new enforcement notice will be issed in early 2021, and the illicit corrected during next Reporting Period.

Illicit Connection was Corrected

Correction of Illicit Connection is Pending Reported Corrected‐Confirmation Pending Table 10. Verified Leaking Laterals >60 Days and >90 Days to Repair‐Enforcement Actions and Schedule for Repair Reporting Period 7/1/20‐12/31/20

If Not Schedule Previous Bldg Bldg Sub‐Catchment Date Date Days to Corrected‐ Date(s) of Status Address Subwatershed Previously Schedule Comments Number Type Area Verified Corrected Correct Days Legal Action Established? Met? Outstanding 10/4/19; 12/3/19; Progressive enforcement was pursued; owner reported corrected April 2020 but post Lateral Repaired by Owner 16 Chilcott Place R‐2 16HMH26SB Charles via Stony Brook Conduit 10/04/2019 4/24/2020 203 Yes No 1/3/20; correction dye test was delayed due to COVID‐19 pandemic related restrictions. 1/14/20 3/11/20; Lateral Repaired by Owner 40 Hampstead Road R‐2 14GMH130SB Charles via Stony Brook Conduit 03/11/2020 11/12/2020 275 No NA 5/11/20; Progressive enforcement was pursued until owner completed correction. 6/24/20 8/17/18; Was originally scheduled to correct by 11/21/18. Owners are elderly and in very poor health. 10/22/18; They need assistance to finance correction; BWSC working with owners and Department of Verified Leaking Lateral ‐ Owner has Been Notified 382 Centre Street R‐2 18HMH271SB Charles via Stony Brook Conduit 08/17/2018 684 Yes No 12/7/18; Neighborhood Development to arrange assistance. Progress was impeded due to COVID‐19 1/7/19 Pandemic related restrictions. 9/9/19; Progressive enforcement was pursued. Owner reported corrected 2/7/20. Post repair dye 11/19/19; test was done 2/20/20 and dye still showed in both sewer and drain. Since entire lateral was Verified Leaking Lateral ‐ Owner has Been Notified 36 Dalrymple Street R‐4‐6 17HMH106SB Charles via Stony Brook Conduit 09/19/2019 286 Yes No 12/19/19; lined owner was reimbursed. Follow‐up is being pursued by Commission to determine if 12/30/19; sewer main is defective. 1/22/20 11/19/19; Was required to correct by 3/8/20. Was scheduled for repair week of 3/16/20 but contractor Verified Leaking Lateral ‐ Owner has Been Notified 62 Harold Street R‐2 18HMH200SB Charles via Stony Brook Conduit 11/19/2019 225 Yes No 1/21/20; suspended work due to COVID‐19 pandemic related restrictions. Enforcement will resume 2/27/20; during next Reporting Period. Was originally scheduled to correct by 3/7/19; owner obtained quotes and a contractor was 11/28/18; selected but could not install liner due to high groundwater through May and June 2019; 2/6/19; Verified Leaking Lateral ‐ Owner has Been Notified 51 Mendum Street R‐1 12ESDO418 Unamed Wetlands 11/28/2018 581 Yes No owner reported lateral was repaired 7/8/19 but post correction dye test was still DIB; repair of 3/11/19; lateral is very complicated and owners contractor was still working on it. Work delayed due to 3/26/19; COVID‐19 pandemic related restrictions.

Leaking Lateral Was Repaired

Repair of Lateral is Pending Table 11. Reportable Sanitary Sewer Overflows (SSOs) in Database 07/01/2020 - 12/31/2020

Table 11. Reportable SSO Events, CSO Events and Building/Private Property Backups During Reporting Period Estimated Volume of Spill Estimated Estimated Estimated Estimated Estimated Total Nearest Estimated Vol. Basis for Estimated Volume Bldg Initial Contact Initial Contact SSO Due to Estimated Spill Spill Spill Distance to Did SSO Outfall Basis for EPA DEP Corrective Action Corrective Action Last SSO at Measures to Prevent Street Neighborhood Notification Source SSO Type Appearance Description of Problem SSO Source Spill Start Spill End Spill End Spill Rate Spill Volume Downstream Sewage to CB Estimate Receiving Water to Rec. Water Number Date Time Capacity? Start Date Duration Recovered Nearest CB (ft) Reach CB? Facility ID Estimate (WB) Notified Notified Containment Cleanup Address Recurrence Point Time Date Time (gpm) (gal) CB (gal) (CB) Body (gal) (min) (gal) BWSC 12-inch combined sewer line stopped upon arrival. BWSC crew jetted line & cleared a debris and grease blockage. Approximately 10-gallons from SSO discharged from sewer manhole 19IMH98 to street & TELEPHONE CALL went into catch basin 19ICB10. BWSC crews jetted Debris COMBINED MWRA - DEER Disinfection Further Investigation 1 52 HIGHLAND ST ROXBURY 07/02/20 10:25 Commission Manhole NO 07/02/20 10:25 07/02/20 11:45 80 0.13 10 10 19ICB10 50 YES 10 Visual 0 Visual YES YES Vactored Catch Basin FROM PUBLIC sewer line & cleared the debris & grease blockage. FOG SEWER ISLAND Vactor Required BWSC crews disinfected the area & vactored the impacted catch basin. No apparent impacts to any surface water bodies, catch basin ties into combined sewer system downstream.

BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 90-gallon SSO discharged from private sewer manhole 22CMH418 to driveway due to a CHANDLER ALLSTON / TELEPHONE CALL blocked or broken private sewer lateral for #128 Private Disinfection 2 128 KENRICK ST 07/08/20 14:38 Private Manhole NO 07/08/20 14:38 07/08/20 19:30 292 0.31 90 90 22CCB192 15 NO 0 Visual 22CSDO384 POND/CHARLES 0 Visual YES YES None Required Owner Responsibility BRIGHTON FROM PUBLIC Kenrick Street. Property owner is responsible for Lateral Owner Responsibility RIVER cleaning the impacted area and for getting a plumber to clear/repair the blocked or broken private sewer lateral. No apparent impacts to any catch basins or water bodies, contained to driveway.

BWSC 10-inch sanitary sewer line stopped upon arrival. BWSC crew jetted line and cleared a grease and debris blockage. Approximately 50-gallons from SSO entered basement of #16 Stellman Road. Property TELEPHONE CALL Debris Further Investigation 3 16 STELLMAN RD ROSLINDALE 07/11/20 22:09 Commission Basement owner is responsible for cleaning the impacted NO 07/11/20 22:09 07/11/20 23:20 71 0.70 50 50 11FCB257 150 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC FOG Required basement area. No impact to any catch basins or surface water bodies, contained in basement. Follow up made to check sewer line conditions with televised survey.

BWSC 20-inch combined sewer line stopped upon arrival. Line was televised and found to be broken. Approximately 5,000-gallons from SSO entered basement of #29 Commonwealth Avenue. Property BACK BAY / TELEPHONE CALL Collapsed 4 29 COMMONWEALTH AV 07/15/20 14:57 Commission Basement owner is responsible for cleaning the impacted NO 07/15/20 14:57 07/15/20 17:00 123 40.65 5,000 5,000 23JCB336 40 NO 0 Visual 0 Visual YES YES Excavation Owner Responsibility Unique Occurance BEACON HILL FROM PUBLIC Pipe basement area. No impact to any catch basins or surface water bodies, contained in basement. Repairs to broken 20-inch combined sewer line in process. Property is under construction and not occupied.

BWSC 18X18-inch sanitary sewer line stopped upon arrival. BWSC crew jetted and vactored line and cleared a grease and debris blockage. Approximately FENWAY / TELEPHONE CALL Plumbing 25-gallon SSO entered basement of #137 Debris Increase PM 5 137 MASSACHUSETTS AV 07/20/20 14:38 Commission NO 07/20/20 14:38 07/20/20 20:30 352 0.07 25 25 22ICB179 150 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility KENMORE FROM PUBLIC Fixture Massachusetts Avenue. Property owner is responsible FOG Frequency for cleaning the impacted basement area. No impact to any catch basins or surface water bodies, contained in basement. BWSC 12-inch sanitary sewer line stopped upon arrival. BWSC crew jetted and vactored line and cleared a debris blockage. Approximately 15-gallon SSO entered basement of #40 Vallar Road. Property TELEPHONE CALL Further Investigation 6 40 VALLAR RD EAST BOSTON 07/23/20 10:31 Commission Basement owner is responsible for cleaning the impacted Debris NO 07/23/20 10:31 07/23/20 14:00 209 0.07 15 15 30OCB47 245 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Required basement area. No impact to any catch basins or surface water bodies, contained in basement. Follow up made to check sewer line conditions with televised survey. BWSC 16x24-inch combined sewer line stopped upon arrival. BWSC crew jetted and vactored line and cleared a grease blockage. Approximately 15-gallon SSO entered basement of #184 Paris Street. Property TELEPHONE CALL Further Investigation 7 184 PARIS ST EAST BOSTON 07/26/20 11:33 Commission Basement owner is responsible for cleaning the impacted FOG NO 07/26/20 11:33 07/26/20 13:00 87 0.17 15 15 27MCB93 190 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Required basement area. No impact to any catch basins or surface water bodies, contained in basement. Follow up made to check sewer line conditions with televised survey.

BWSC line down and running upon arrival and departure. Approximately 15-gallon SSO discharged from private sewer manhole 8HMH513 due to a debris Disinfection blockage in private sewer lateral. BWSC crew assisted Private 8 1672 BLUE HILL AV MATTAPAN MBTA 08/01/20 12:39 Private Manhole NO 08/01/20 12:39 08/01/20 17:30 291 0.05 15 15 8HCB260 50 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility Owner Responsibility MBTA, vactored private manhole and cleared a debris Lateral Vactor blockage. Dye tested to confirm private lateral was down and running. Disinfected the impacted street area. No impacts to any catch basins or water bodies.

BWSC lines down and running upon arrival and departure. Approximately 75-gallon SSO discharged from a unmapped private sewer manhole to street and went into private catch basin 16MCB51. BWSC crew DORCHESTER NORTH TELEPHONE CALL Private 9 435 MOUNT VERNON ST 08/24/20 19:58 Private Manhole disinfected the area. Property owner is responsible for NO 08/24/20 19:58 08/24/20 21:30 92 0.82 75 75 16MCB51 150 YES 75 Visual 17MSDO33 BAY/BOSTON 0 Visual YES YES None Required Owner Responsibility Owner Responsibility DORCHESTER FROM PUBLIC Lateral getting a plumber to clear/repair the blocked/broken HARBOR private sewer line. No apparent impacts to any water bodies. Owner's plumber is working on clearing/repairing private line. BWSC 10-inch sanitary sewer line stopped upon arrival. BWSC crew jetted and cleared a debris and grease blockage. Approximately 80-gallons from the SSO discharged from 20DMH85 into street/curb and ALLSTON / TELEPHONE CALL into 20DCB26. No apparent impact to any water Debris BROOKLINE DRAINS Disinfection Further Investigation 10 324 CHESTNUT HILL AV 08/26/20 19:47 Commission Manhole NO 08/26/20 19:47 08/26/20 22:00 133 0.60 80 80 20DCB26 180 YES 80 Visual 20DMH19 0 Visual YES YES Vactored Catch Basin 01/18/20 BRIGHTON FROM PUBLIC bodies, contained to street/curb and catch basin FOG TO VILLAGE BROOK Vactor Required 20DCB26. BWSC crew disinfected the area and vactored the impacted catch basin. Follow up made to clean line and check sewer line conditions with televised survey. BWSC lines down and running upon arrival and departure. During a scheduled lateral inspection dye tested #4 Michelangelo Street, dye appeared in the TELEPHONE CALL basement of #196 Salem Street. Approximately 25- Private 11 196 SALEM ST CENTRAL 09/17/20 11:00 Private Basement NO 09/17/20 11:00 09/17/20 13:00 120 0.21 25 25 26KCB240 100 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility 09/15/20 Owner Responsibility FROM PUBLIC gallon SSO contained in the basement of #196 Salem Lateral St, no impacts to any catch basins or water bodies. Property owner is responsible for repairing the broken private sewer lateral. Table 11. Reportable Sanitary Sewer Overflows (SSOs) in Database 07/01/2020 - 12/31/2020

Table 11. Reportable SSO Events, CSO Events and Building/Private Property Backups During Reporting Period Estimated Volume of Spill Estimated Estimated Estimated Estimated Estimated Total Nearest Estimated Vol. Basis for Estimated Volume Bldg Initial Contact Initial Contact SSO Due to Estimated Spill Spill Spill Distance to Did SSO Outfall Basis for EPA DEP Corrective Action Corrective Action Last SSO at Measures to Prevent Street Neighborhood Notification Source SSO Type Appearance Description of Problem SSO Source Spill Start Spill End Spill End Spill Rate Spill Volume Downstream Sewage to CB Estimate Receiving Water to Rec. Water Number Date Time Capacity? Start Date Duration Recovered Nearest CB (ft) Reach CB? Facility ID Estimate (WB) Notified Notified Containment Cleanup Address Recurrence Point Time Date Time (gpm) (gal) CB (gal) (CB) Body (gal) (min) (gal)

BWSC 10-inch sanitary sewer line stopped on arrival. BWSC crew jetted and cleared debris blockage in sewer line. Approximately 5-gallons from the SSO TELEPHONE CALL entered the basement of #29 Goodrich Road. Property Further Investigation 12 29 GOODRICH RD JAMAICA PLAIN 09/21/20 14:15 Commission Basement Debris NO 09/21/20 14:15 09/21/20 18:45 270 0.02 5 5 16GCB25 75 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC owner is responsible for cleaning the impacted Required basement area. No impact to any catch basins or water bodies, contained to basement. Follow up made to clean and televise sewer line to check conditions.

BWSC 10-inch sanitary sewer line stopped on arrival. Approximately 75-gallons from the SSO discharged from three sewer manholes (20KMH168, 20KMH169, & 20KMH170) to street and went into four catch FORT POINT Contained Wash Down TELEPHONE CALL basins (20KCB46, 20HCB48, 20KCB52, & 20KCB248). Collapsed Excavation 13 2 WIDETT CIR SOUTH BOSTON 09/23/20 09:27 Commission Manhole NO 09/23/20 09:27 09/23/20 13:45 258 0.29 75 75 20KCB46 150 YES 75 Visual 21KCSO070 CHANNEL / BOSTON 0 Visual YES YES Disinfection Unique Occurance FROM PUBLIC No apparent impacts to any water bodies. Sewer line Pipe Vactored Catch Basin HARBOR Vactor appears to have been broken during recent excavation on street. BWSC in the process of repairing the broken 10-inch sewer line. BWSC crews disinfecting area and vactoring impacted catch basins.

BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Dye tested #599 East Broadway, dye appeared in the basement of #601 East Broadway. Approximately 10- TELEPHONE CALL gallon SSO contained in the basement of #601 East Private 14 599 EAST BROADWAY SOUTH BOSTON 09/24/20 13:21 Private Basement NO 09/24/20 13:21 09/24/20 15:00 99 0.10 10 10 20MCB144 30 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility Owner Responsibility FROM PUBLIC Broadway, no impacts to any catch basins or water Lateral bodies. Property owners are responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked or broken private sewer lateral. BWSC 10-inch sewer line stopped upon arrival after heavy rain event, crews jetted/vactored line and cleared debris (gravel) blockage. Approximately 3,000- gallons discharged from two sewer manholes Vactored Catch Basin Contained Wash Down SOUTH (14JMH114 & 14JMH116), into street and into three Further Investigation 15 198 GENEVA AV MAYOR'S OFFICE 09/30/20 11:51 Commission Manhole Debris NO 09/30/20 11:51 09/30/20 19:30 459 6.54 3,000 3,000 14JCB37 60 YES 3,000 Visual 13LSDO090 NEPONSET RIVER 0 Visual YES YES Vactored Disinfection 03/28/20 DORCHESTER catch basins (14JCB37, 14JCB38, 14JCB42). BWSC Required Downstream Drain Vactor crews disinfecting area and vactoring impacted catch basins/drain line. No apparent impacts to any water bodies. Follow up to check sewer line conditions with televised survey.

BWSC 10-inch sanitary sewer line stopped on arrival. Approximately 50-gallons from the SSO discharged from two sewer manholes (20KMH171 & 20KMH172) Collapsed FORT POINT Contained Wash Down TELEPHONE CALL to street and went into two catch basins (20KCB52 & Excavation Further Investigation 16 2 WIDETT CIR SOUTH BOSTON 10/26/20 15:40 Commission Manhole Pipe NO 10/26/20 15:40 10/26/20 21:00 320 0.16 50 50 20KCB52 30 YES 50 Visual 21KCSO070 CHANNEL / BOSTON 0 Visual YES YES Disinfection 09/23/20 FROM PUBLIC 20KCB248). No apparent impacts to any water bodies. Vactored Catch Basin Required Debris HARBOR Vactor BWSC crews disinfected area and vactoring impacted catch basins. Point repairs being made to broken lines in area.

BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 85-gallons SSO in the basement of #4374 Washington Street due to blocked private sewer Disinfection TELEPHONE CALL lateral. SSO was pumped out to street and went into Private 17 4374 WASHINGTON ST ROSLINDALE 11/01/20 19:00 Private Basement NO 11/01/20 19:00 11/01/20 20:00 60 1.42 85 85 10ECB241 50 YES 85 Visual 0 Visual YES YES Vactored Catch Basin Owner Responsibility Owner Responsibility FROM PUBLIC catch basin 10ECB241. BWSC crew disinfected area Lateral Vactor and vactored the impacted catch basin. Property owner's plumber cleared the blockage in the private sewer lateral. No apparent impacts to any water bodies. BWSC 18-inch combined sewer line stopped on arrival. BWSC crew jetted and vactored line and cleared a grease blockage. Approximately 20-gallons from SSO entered the basement of #257 Hanover Street. TELEPHONE CALL Further Investigation 18 257 HANOVER ST CENTRAL 11/15/20 08:40 Commission Basement Property owner is responsible for cleaning the FOG NO 11/15/20 08:40 11/15/20 11:20 160 0.13 20 20 23KCB684 150 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Required impacted basement area. No impacts to any catch basins or water bodies, containted to basement. Follow up made to inspect commercial grease traps in the area. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 50-gallons from SSO surfaced from private sewer cleanout and went into catch basin Plumbing Private COMBINED MWRA - DEER Disinfection 19 140 CHARLAME ST ROXBURY MAYOR'S OFFICE 11/18/20 10:34 Private 17ICB142 due to blocked private sewer lateral at #140- NO 11/18/20 10:34 11/18/20 15:00 266 0.19 50 50 17ICB42 20 YES 50 Visual 0 Visual YES YES Vactored Catch Basin 09/28/18 Owner Responsibility Fixture Lateral SEWER ISLAND Vactor 150 Charlame Street. BWSC crew disinfected area and vactored the impacted catch basin. Property owner's plumber arrived and cleared the blockage in the private sewer lateral. BWSC 8-inch and 24-inch sanitary sewer lines surcharged upon arrival and departure due to a heavy rain event. Approximately 400-gallons from the SSO Further Investigation NORTH TELEPHONE CALL entered the basement of #299 Hancock Street. Inflow/ 20 299 HANCOCK ST 12/05/20 22:25 Commission Basement YES 12/05/20 22:25 12/05/20 23:30 65 6.15 400 400 15KCB90 70 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility Required DORCHESTER FROM PUBLIC Property owner is responsible for cleaning the Infiltration Unique Occurance basement area. No impact to any catch basins or water bodies, contained to basement. Notified Mayor's Office. BWSC 12-inch sanitary sewer line stopped upon arrival. BWSC crew jetted and cleared a grease blockage. Approximately 50-gallons from the SSO entered the basement of #45 Homes Avenue. Property SOUTH TELEPHONE CALL owner is responsible for cleaning the impacted Further Investigation 21 45 HOMES AV 12/05/20 20:23 Commission Basement FOG NO 12/05/20 20:23 12/05/20 21:30 67 0.75 50 50 14JCB178 100 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility DORCHESTER FROM PUBLIC basement area. No impact to any catch basins or Required surface water bodies, contained to basement. Follow up made to check sewer line conditions with televised survey. SSO occurred during heavy rain event on 12/5/2020. Table 11. Reportable Sanitary Sewer Overflows (SSOs) in Database 07/01/2020 - 12/31/2020

Table 11. Reportable SSO Events, CSO Events and Building/Private Property Backups During Reporting Period Estimated Volume of Spill Estimated Estimated Estimated Estimated Estimated Total Nearest Estimated Vol. Basis for Estimated Volume Bldg Initial Contact Initial Contact SSO Due to Estimated Spill Spill Spill Distance to Did SSO Outfall Basis for EPA DEP Corrective Action Corrective Action Last SSO at Measures to Prevent Street Neighborhood Notification Source SSO Type Appearance Description of Problem SSO Source Spill Start Spill End Spill End Spill Rate Spill Volume Downstream Sewage to CB Estimate Receiving Water to Rec. Water Number Date Time Capacity? Start Date Duration Recovered Nearest CB (ft) Reach CB? Facility ID Estimate (WB) Notified Notified Containment Cleanup Address Recurrence Point Time Date Time (gpm) (gal) CB (gal) (CB) Body (gal) (min) (gal)

BWSC 10-inch sanitary sewer line stopped on arrival. BWSC crew jetted and cleared a debris blockage in the sewer line. Approximately 30-gallons from the SSO TELEPHONE CALL entered the basement of #9 Perkins Avenue. Property Further Investigation 22 9 PERKINS AV HYDE PARK 12/13/20 17:59 Commission Basement Debris NO 12/13/20 17:59 12/13/20 22:40 281 0.11 30 30 5FCB189 20 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC owner is responsible for cleaning the impacted Required basement area. No impact to any catch basins or water bodies, contained to basement. Follow up made to clean and televise sewer line to check conditions.

BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 1-gallon SSO surfaced in the front yard of #39 Forbes Street due to a blocked or broken TELEPHONE CALL private sewer lateral. Dye tested to confirm source. No Private 23 39 FORBES ST JAMAICA PLAIN 12/23/20 15:37 Private Ground NO 12/23/20 15:37 12/23/20 18:45 188 0.01 1 0 17GCB138 350 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility Owner Responsibility FROM PUBLIC impacts to any catch basins or water bodies contained Lateral to front yard. Property owner is responsible for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber for a lateral inspection.

BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 2-gallon SSO discharged from a pipe in the back porch/back yard in the rear of #112 Elm TELEPHONE CALL Private 24 112 ELM ST CHARLESTOWN 12/28/20 10:30 Private Pipe Street due to blocked or broken private plumbing. No NO 12/28/20 10:30 12/28/20 11:55 85 0.02 2 0 28KCB147 25 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility Owner Responsibility FROM PUBLIC Lateral impacts to any catch basins or water bodies contained to back yard. Property owner is responsible for getting a plumber to clear/repair the blocked/broken private plumbing. Owner will call a plumber.

BWSC 12-inch sanitary sewer line stopped on arrival. BWSC crews jetted and vactored line and removed heavy gravel debris, sewer line broken. Approximately 500-gallons from the SSO in the basement of #77 Louis FENWAY / TELEPHONE CALL Collapsed Further Investigation 25 77 AVE LOUIS PASTEUR 12/28/20 13:53 Commission Basement Pasteur Avenue. No impacts to any catch basins or NO 12/28/2020 13:53 12/28/20 19:00 307 1.63 500 500 21HCB33 50 NO 0 Visual 0 Visual YES YES Excavation Owner Responsibility KENMORE FROM PUBLIC Pipe Required water bodies, contained in basement. Property owner cleaned the impacted basement area. BWSC contractor to complete repairs to broken 12-inch sanitary sewer line. Table 12. Sanitary Sewer Overflows (SSOs) in Database 07/01/2020 - 12/31/2020

Table 12. All SSOs, CSOs and Building Private Property Backups During Reporting Period Estimated Volume of Spill Estimated Estimated Estimated Spill Estimated Spill Nearest Estimated Vol. Basis for Estimated Volume Bldg Initial Contact Initial Contact Appearance SSO Due to Estimated Spill Spill Start Spill End Spill End Duration Spill Rate Estimated Total Recovered Downstream Distance to Did SSO Sewage to CB Estimate Outfall to Rec. Water Basis for EPA DEP Corrective Action Corrective Action Last SSO at Measures to Prevent Number Street Neighborhood Notification Source Date Time SSO Type Point Description of Problem SSO Source Capacity? Start Date Time Date Time (min) (gpm) Spill Volume (gal) (gal) CB Nearest CB (ft) Reach CB? (gal) (CB) Facility ID Receiving Water Body (gal) Estimate (WB) Notified Notified Containment Cleanup Address Recurrence BWSC 12-inch combined sewer line stopped upon arrival. BWSC crew jetted line & cleared a debris and grease blockage. Approximately 10-gallons from SSO discharged from sewer manhole 19IMH98 to street TELEPHONE CALL & went into catch basin 19ICB10. BWSC crews jetted Debris COMBINED MWRA - DEER Vactored Catch Disinfection Further Investigation 1 52 HIGHLAND ST ROXBURY 07/02/20 10:25 Commission Manhole NO 07/02/20 10:25 07/02/20 11:45 80 0.13 10 10 19ICB10 50 YES 10 Visual 0 Visual YES YES FROM PUBLIC sewer line & cleared the debris & grease blockage. FOG SEWER ISLAND Basin Vactor Required BWSC crews disinfected the area & vactored the impacted catch basin. No apparent impacts to any surface water bodies, catch basin ties into combined sewer system downstream. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #249 Maverick Street due to a internal plumbing TELEPHONE CALL Plumbing Private Owner 2 249 MAVERICK ST EAST BOSTON 07/06/20 12:06 Private problem. Property owner is responsible for cleaning NO 07/06/20 12:06 07/06/20 13:25 79 0.13 10 10 26MCB110 90 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC Fixture Lateral Responsibility the impacted basement area. No impacts to any catch basins or water bodies, contained in basement. Owner's plumber arrived on site to clear/repair the internal plumbing problem.

BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 90-gallon SSO discharged from private sewer manhole 22CMH418 to driveway due CHANDLER ALLSTON / TELEPHONE CALL to a blocked or broken private sewer lateral for #128 Private Disinfection Owner 3 128 KENRICK ST 07/08/20 14:38 Private Manhole NO 07/08/20 14:38 07/08/20 19:30 292 0.31 90 90 22CCB192 15 NO 0 Visual 22CSDO384 POND/CHARLES 0 Visual YES YES None Required BRIGHTON FROM PUBLIC Kenrick Street. Property owner is responsible for Lateral Owner Responsibility Responsibility RIVER cleaning the impacted area and for getting a plumber to clear/repair the blocked or broken private sewer lateral. No apparent impacts to any catch basins or water bodies, contained to driveway. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #254 Marion Street due to a internal plumbing TELEPHONE CALL Private Owner 4 254 MARION ST EAST BOSTON 07/09/20 10:39 Private Basement problem. Property owner is responsible for cleaning NO 07/09/20 10:39 07/09/20 11:15 36 0.28 10 10 27MCB637 45 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC Lateral Responsibility the impacted basement area. No impacts to any catch basins or water bodies, contained in basement. Owner will call a plumber to clear/repair the internal plumbing problem. BWSC 10-inch sanitary sewer line stopped upon arrival. BWSC crew jetted line and cleared a grease and debris blockage. Approximately 50-gallons from SSO entered basement of #16 Stellman Road. TELEPHONE CALL Debris Further Investigation 5 16 STELLMAN RD ROSLINDALE 07/11/20 22:09 Commission Basement Property owner is responsible for cleaning the NO 07/11/20 22:09 07/11/20 23:20 71 0.70 50 50 11FCB257 150 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC FOG Required impacted basement area. No impact to any catch basins or surface water bodies, contained in basement. Follow up made to check sewer line conditions with televised survey. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #9 Emmons Street due to a internal plumbing problem. TELEPHONE CALL Plumbing Private Owner 6 9 EMMONS ST EAST BOSTON 07/15/20 10:33 Private Property owner is responsible for cleaning the NO 07/15/20 10:33 07/15/20 11:35 62 0.16 10 10 26MCB323 15 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility 04/01/19 FROM PUBLIC Fixture Lateral Responsibility impacted basement area and for getting a plumber to clear/repair the internal plumbing problem. No impacts to any catch basins or water bodies, contained in basement. BWSC 20-inch combined sewer line stopped upon arrival. Line was televised and found to be broken. Approximately 5,000-gallons from SSO entered basement of #29 Commonwealth Avenue. Property BACK BAY / TELEPHONE CALL owner is responsible for cleaning the impacted Collapsed 7 29 COMMONWEALTH AV 07/15/20 14:57 Commission Basement NO 07/15/20 14:57 07/15/20 17:00 123 40.65 5,000 5,000 23JCB336 40 NO 0 Visual 0 Visual YES YES Excavation Owner Responsibility Unique Occurance BEACON HILL FROM PUBLIC basement area. No impact to any catch basins or Pipe surface water bodies, contained in basement. Repairs to broken 20-inch combined sewer line in process. Property is under construction and not occupied. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 3-gallon SSO in the basement of #1 Hartford Street due to a internal plumbing problem. TELEPHONE CALL Private Owner 8 1 HARTFORD ST ROXBURY 07/17/20 22:15 Private Basement Property owner is responsible for cleaning the NO 07/17/20 22:15 07/17/20 23:15 60 0.05 3 3 17JCB205 25 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility 12/06/17 FROM PUBLIC Lateral Responsibility impacted basement area. No impacts to any catch basins or water bodies, contained in basement. Owner will call a plumber to clear/repair the internal plumbing problem. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #336 Meridian Street due to a blocked or broken TELEPHONE CALL private sewer lateral. Property owner is responsible Private Owner 9 336 MERIDIAN ST EAST BOSTON 07/17/20 10:51 Private Basement NO 07/17/20 10:51 07/17/20 12:40 109 0.09 10 10 28MCB24 200 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC for cleaning the impacted basement area and for Lateral Responsibility getting a plumber to clear/repair the private sewer lateral. No impacts to any catch basins or water bodies, contained in basement. Dye tested premises, dye did not show anywhere. BWSC 18X18-inch sanitary sewer line stopped upon arrival. BWSC crew jetted and vactored line and cleared a grease and debris blockage. Approximately FENWAY / TELEPHONE CALL Plumbing 25-gallon SSO entered basement of #137 Debris Increase PM 10 137 MASSACHUSETTS AV 07/20/20 14:38 Commission NO 07/20/20 14:38 07/20/20 20:30 352 0.07 25 25 22ICB179 150 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility KENMORE FROM PUBLIC Fixture Massachusetts Avenue. Property owner is FOG Frequency responsible for cleaning the impacted basement area. No impact to any catch basins or surface water bodies, contained in basement. BWSC 12-inch sanitary sewer line stopped upon arrival. BWSC crew jetted and vactored line and cleared a debris blockage. Approximately 15-gallon SSO entered basement of #40 Vallar Road. Property TELEPHONE CALL Further Investigation 11 40 VALLAR RD EAST BOSTON 07/23/20 10:31 Commission Basement owner is responsible for cleaning the impacted Debris NO 07/23/20 10:31 07/23/20 14:00 209 0.07 15 15 30OCB47 245 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Required basement area. No impact to any catch basins or surface water bodies, contained in basement. Follow up made to check sewer line conditions with televised survey. BWSC 16x24-inch combined sewer line stopped upon arrival. BWSC crew jetted and vactored line and cleared a grease blockage. Approximately 15- gallon SSO entered basement of #184 Paris Street. TELEPHONE CALL Further Investigation 12 184 PARIS ST EAST BOSTON 07/26/20 11:33 Commission Basement Property owner is responsible for cleaning the FOG NO 07/26/20 11:33 07/26/20 13:00 87 0.17 15 15 27MCB93 190 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Required impacted basement area. No impact to any catch basins or surface water bodies, contained in basement. Follow up made to check sewer line conditions with televised survey. Table 12. Sanitary Sewer Overflows (SSOs) in Database 07/01/2020 - 12/31/2020

Table 12. All SSOs, CSOs and Building Private Property Backups During Reporting Period Estimated Volume of Spill Estimated Estimated Estimated Spill Estimated Spill Nearest Estimated Vol. Basis for Estimated Volume Bldg Initial Contact Initial Contact Appearance SSO Due to Estimated Spill Spill Start Spill End Spill End Duration Spill Rate Estimated Total Recovered Downstream Distance to Did SSO Sewage to CB Estimate Outfall to Rec. Water Basis for EPA DEP Corrective Action Corrective Action Last SSO at Measures to Prevent Number Street Neighborhood Notification Source Date Time SSO Type Point Description of Problem SSO Source Capacity? Start Date Time Date Time (min) (gpm) Spill Volume (gal) (gal) CB Nearest CB (ft) Reach CB? (gal) (CB) Facility ID Receiving Water Body (gal) Estimate (WB) Notified Notified Containment Cleanup Address Recurrence BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 75-gallon SSO in the basement of #556 Columbia Road due to a internal plumbing NORTH TELEPHONE CALL problem. Property owner is responsible for cleaning Private Owner 13 556 COLUMBIA RD 07/30/20 11:00 Private Basement NO 07/30/20 11:00 07/30/20 12:30 90 0.83 75 75 16KCB234 30 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility DORCHESTER FROM PUBLIC the impacted basement area and for getting a Lateral Responsibility plumber to clear/repair the blocked/broken private sewer lateral. No impacts to any catch basins or water bodies, contained in basement. Owner will call a plumber. BWSC line down and running upon arrival and departure. Approximately 15-gallon SSO discharged from private sewer manhole 8HMH513 due to a debris blockage in private sewer lateral. BWSC crew Disinfection Private Owner 14 1672 BLUE HILL AV MATTAPAN MBTA 08/01/20 12:39 Private Manhole assisted MBTA, vactored private manhole and NO 08/01/20 12:39 08/01/20 17:30 291 0.05 15 15 8HCB260 50 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility Lateral Responsibility cleared a debris blockage. Dye tested to confirm Vactor private lateral was down and running. Disinfected the impacted street area. No impacts to any catch basins or water bodies. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 80-gallon SSO in the basement of #99 Bloomfield Street due to a blocked or broken private SOUTH TELEPHONE CALL sewer lateral. Property owner is responsible for Private Owner 15 99 BLOOMFIELD ST 08/01/20 07:33 Private Basement NO 08/01/20 07:33 08/01/20 09:15 102 0.78 80 80 13JCB236 50 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility DORCHESTER FROM PUBLIC cleaning the impacted basement area and for getting Lateral Responsibility a plumber to clear/repair the blocked/broken private sewer lateral. No impacts to any catch basins or water bodies, contained in basement. Owner will call a plumber. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 50-gallon SSO in the basement of #752 East Fifth Street due to a blocked private sewer TELEPHONE CALL Plumbing Private Owner 16 752 EAST FIFTH ST SOUTH BOSTON 08/10/20 10:07 Private lateral. No impacts to any catch basins or water NO 08/10/20 10:07 08/10/20 12:00 113 0.44 50 50 20MCB85 250 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC Fixture Lateral Responsibility bodies, contained in basement. Owner's plumber arrived on site and cleared the blockage in the private sewer lateral. Clean up company to clean basement area. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 25-gallon SSO in the basement of #10 Crowell Street due to a internal plumbing problem. TELEPHONE CALL Private Owner 17 10 CROWELL ST MATTAPAN 08/16/20 09:53 Private Basement Property owner is responsible for cleaning the NO 08/16/20 09:53 08/16/20 11:30 97 0.26 25 25 11ICB244 175 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC Lateral Responsibility impacted basement area and for getting a plumber to clear/repair the internal problem. No impacts to any catch basins or water bodies, contained in basement. Owner will call a plumber. BWSC lines down and running upon arrival and departure. Approximately 75-gallon SSO discharged from a unmapped private sewer manhole to street and went into private catch basin 16MCB51. BWSC DORCHESTER NORTH TELEPHONE CALL Private Owner 18 435 MOUNT VERNON ST 08/24/20 19:58 Private Manhole crew disinfected the area. Property owner is NO 08/24/20 19:58 08/24/20 21:30 92 0.82 75 75 16MCB51 150 YES 75 Visual 17MSDO33 BAY/BOSTON 0 Visual YES YES None Required Owner Responsibility DORCHESTER FROM PUBLIC Lateral Responsibility responsible for getting a plumber to clear/repair the HARBOR blocked/broken private sewer line. No apparent impacts to any water bodies. Owner's plumber is working on clearing/repairing private line. BWSC 10-inch sanitary sewer line stopped upon arrival. BWSC crew jetted and cleared a debris and grease blockage. Approximately 80-gallons from the SSO discharged from 20DMH85 into street/curb and ALLSTON / TELEPHONE CALL into 20DCB26. No apparent impact to any water Debris BROOKLINE DRAINS Vactored Catch Disinfection Further Investigation 19 324 CHESTNUT HILL AV 08/26/20 19:47 Commission Manhole NO 08/26/20 19:47 08/26/20 22:00 133 0.60 80 80 20DCB26 180 YES 80 Visual 20DMH19 0 Visual YES YES 01/18/20 BRIGHTON FROM PUBLIC bodies, contained to street/curb and catch basin FOG TO VILLAGE BROOK Basin Vactor Required 20DCB26. BWSC crew disinfected the area and vactored the impacted catch basin. Follow up made to clean line and check sewer line conditions with televised survey. BWSC line down & running upon arrival & departure. BWSC crew jetted line past connection. Approximately 20-gallon SSO in the basement of #5 Cheever Ct due to a blocked/broken private sewer line. Property owner is responsible for cleaning the TELEPHONE CALL Private Owner 20 5 CHEEVER CT EAST BOSTON 08/31/20 11:16 Private Basement impacted basement and for getting a plumber to NO 08/31/20 11:16 08/31/20 13:15 119 0.17 20 20 26MCB105 130 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC Lateral Responsibility clear/repair the blocked/broken private sewer line. No impacts to any catch basins or water bodies, contained in basement. Owner will call a plumber. Cheever Ct has a private 6-inch sewer line. ISD notified. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 50-gallon SSO in the basement of #96 Hancock Street due to a blocked or broken private NORTH TELEPHONE CALL sewer lateral. Property owner is responsible for Private Owner 21 96 HANCOCK ST 09/08/20 09:52 Private Basement NO 09/08/20 09:52 09/08/20 12:15 143 0.35 50 50 16KCB44 20 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility DORCHESTER FROM PUBLIC cleaning the impacted basement area and for getting Lateral Responsibility a plumber to clear/repair the blocked/broken private sewer lateral. No impacts to any catch basins or water bodies, contained in basement. Owner will call a plumber. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 60-gallon SSO in the basement of #45 Brooks St due to a internal problem. Property owner TELEPHONE CALL Private Owner 22 45 BROOKS ST EAST BOSTON 09/14/20 13:11 Private Basement is responsible for cleaning the impacted basement NO 09/14/20 13:11 09/14/20 16:00 169 0.36 60 60 27MCB159 25 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC Lateral Responsibility area and for getting a plumber to clear/repair the internal problem. No impacts to any catch basins or water bodies, contained in basement. Owner will call a plumber. BWSC lines down and running upon arrival and departure. Approximately 25-gallon SSO in the basement of #196 Salem Street due to a blocked or broken private sewer lateral. Contained in basement TELEPHONE CALL Private Owner 23 196 SALEM ST CENTRAL 09/15/20 10:32 Private Basement no impacts to any catch basins or water bodies. NO 09/15/20 10:32 09/15/20 12:00 88 0.28 25 25 26KCB240 100 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC Lateral Responsibility Property owner to call a plumber. Dye tested nearby property at #4 Michelangelo St no dye appeared in basement. Owner will call back if dye appears and set up lateral inspection with plumber. BWSC lines down and running upon arrival and departure. During a scheduled lateral inspection dye tested #4 Michelangelo Street, dye appeared in the TELEPHONE CALL basement of #196 Salem Street. Approximately 25- Private Owner 24 196 SALEM ST CENTRAL 09/17/20 11:00 Private Basement NO 09/17/20 11:00 09/17/20 13:00 120 0.21 25 25 26KCB240 100 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility 09/15/20 FROM PUBLIC gallon SSO contained in the basement of #196 Salem Lateral Responsibility St, no impacts to any catch basins or water bodies. Property owner is responsible for repairing the broken private sewer lateral. Table 12. Sanitary Sewer Overflows (SSOs) in Database 07/01/2020 - 12/31/2020

Table 12. All SSOs, CSOs and Building Private Property Backups During Reporting Period Estimated Volume of Spill Estimated Estimated Estimated Spill Estimated Spill Nearest Estimated Vol. Basis for Estimated Volume Bldg Initial Contact Initial Contact Appearance SSO Due to Estimated Spill Spill Start Spill End Spill End Duration Spill Rate Estimated Total Recovered Downstream Distance to Did SSO Sewage to CB Estimate Outfall to Rec. Water Basis for EPA DEP Corrective Action Corrective Action Last SSO at Measures to Prevent Number Street Neighborhood Notification Source Date Time SSO Type Point Description of Problem SSO Source Capacity? Start Date Time Date Time (min) (gpm) Spill Volume (gal) (gal) CB Nearest CB (ft) Reach CB? (gal) (CB) Facility ID Receiving Water Body (gal) Estimate (WB) Notified Notified Containment Cleanup Address Recurrence BWSC 10-inch sanitary sewer line stopped on arrival. BWSC crew jetted and cleared debris blockage in sewer line. Approximately 5-gallons from the SSO entered the basement of #29 Goodrich Road. TELEPHONE CALL Further Investigation 25 29 GOODRICH RD JAMAICA PLAIN 09/21/20 14:15 Commission Basement Property owner is responsible for cleaning the Debris NO 09/21/20 14:15 09/21/20 18:45 270 0.02 5 5 16GCB25 75 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Required impacted basement area. No impact to any catch basins or water bodies, contained to basement. Follow up made to clean and televise sewer line to check conditions. BWSC lines down and running upon arrival and departure. BWSC crew jetted past connection. Approximately 50-gallon SSO in the basement of #39 Almont Street due to a blocked or broken private TELEPHONE CALL sewer lateral. No impacts to any catch basins or Private Owner 26 39 ALMONT ST MATTAPAN 09/21/20 11:45 Private Basement NO 09/21/20 11:45 09/21/20 15:05 200 0.25 50 50 9HCB96 20 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber. BWSC 10-inch sanitary sewer line stopped on arrival. Approximately 75-gallons from the SSO discharged from three sewer manholes (20KMH168, 20KMH169, & 20KMH170) to street and went into four catch basins (20KCB46, 20HCB48, 20KCB52, & 20KCB248). FORT POINT Excavation Contained Wash Down TELEPHONE CALL Collapsed 27 2 WIDETT CIR SOUTH BOSTON 09/23/20 09:27 Commission Manhole No apparent impacts to any water bodies. Sewer line NO 09/23/20 09:27 09/23/20 13:45 258 0.29 75 75 20KCB46 150 YES 75 Visual 21KCSO070 CHANNEL / BOSTON 0 Visual YES YES Vactored Catch Disinfection Unique Occurance FROM PUBLIC Pipe appears to have been broken during recent HARBOR Basin Vactor excavation on street. BWSC in the process of repairing the broken 10-inch sewer line. BWSC crews disinfecting area and vactoring impacted catch basins. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Dye tested #599 East Broadway, dye appeared in the basement of #601 East Broadway. Approximately 10- TELEPHONE CALL gallon SSO contained in the basement of #601 East Private Owner 28 599 EAST BROADWAY SOUTH BOSTON 09/24/20 13:21 Private Basement NO 09/24/20 13:21 09/24/20 15:00 99 0.10 10 10 20MCB144 30 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Broadway, no impacts to any catch basins or water Lateral Responsibility bodies. Property owners are responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked or broken private sewer lateral. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #49 Lyon Street due to a internal problem. No impacts to SOUTH TELEPHONE CALL Private Owner 29 49 LYON ST 09/27/20 11:34 Private Basement any catch basins or water bodies, contained in NO 09/27/20 11:34 09/27/20 13:00 86 0.12 10 10 15KCB70 230 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility DORCHESTER FROM PUBLIC Lateral Responsibility basement. Property owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the internal problem. Owner will call a plumber. BWSC 10-inch sewer line stopped upon arrival after heavy rain event, crews jetted/vactored line and cleared debris (gravel) blockage. Approximately 3,000-gallons discharged from two sewer manholes Vactored Catch Contained Wash Down SOUTH (14JMH114 & 14JMH116), into street and into three Basin Further Investigation 30 198 GENEVA AV MAYOR'S OFFICE 09/30/20 11:51 Commission Manhole Debris NO 09/30/20 11:51 09/30/20 19:30 459 6.54 3,000 3,000 14JCB37 60 YES 3,000 Visual 13LSDO090 NEPONSET RIVER 0 Visual YES YES Disinfection 03/28/20 DORCHESTER catch basins (14JCB37, 14JCB38, 14JCB42). BWSC Vactored Required Vactor crews disinfecting area and vactoring impacted catch Downstream Drain basins/drain line. No apparent impacts to any water bodies. Follow up to check sewer line conditions with televised survey. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 80-gallon SSO in the basement of #168 Cambridge Street due to a blocked or broken TELEPHONE CALL private sewer lateral. No impacts to any catch basins Private Owner 31 168 CAMBRIDGE ST CENTRAL 10/01/20 17:47 Private Basement NO 10/01/20 17:47 10/01/20 18:30 43 1.86 80 80 25KCB27 35 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC or water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked or broken private sewer lateral. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 30-gallon SSO in the basement of #3 Worcester Square due to a blocked or broken TELEPHONE CALL private sewer lateral. No impacts to any catch basins Private Owner 32 3 WORCESTER SQ SOUTH END 10/04/20 13:47 Private Basement NO 10/04/20 13:47 10/04/20 14:30 43 0.70 30 30 20JCB139 30 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC or water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #80 Mount Pleasant Avenue due to a blocked or broken TELEPHONE CALL private sewer lateral. No impacts to any catch basins Private Owner 33 80 MOUNT PLEASANT AV ROXBURY 10/17/20 08:30 Private Basement NO 10/17/20 08:30 10/17/20 10:30 120 0.08 10 10 18JCB26 60 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC or water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #264 Hyde Park Avenue due to a blocked or broken TELEPHONE CALL private sewer lateral. No impacts to any catch basins Private Owner 34 264 HYDE PARK AV ROSLINDALE 10/19/20 13:43 Private Basement NO 10/19/20 13:43 10/19/20 15:30 107 0.09 10 10 12GCB70 15 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility 01/15/20 FROM PUBLIC or water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. BWSC 10-inch sanitary sewer line stopped on arrival. Approximately 50-gallons from the SSO discharged from two sewer manholes (20KMH171 & Collapsed FORT POINT Excavation Contained Wash Down TELEPHONE CALL 20KMH172) to street and went into two catch basins Further Investigation 35 2 WIDETT CIR SOUTH BOSTON 10/26/20 15:40 Commission Manhole Pipe NO 10/26/20 15:40 10/26/20 21:00 320 0.16 50 50 20KCB52 30 YES 50 Visual 21KCSO070 CHANNEL / BOSTON 0 Visual YES YES Vactored Catch Disinfection 09/23/20 FROM PUBLIC (20KCB52 & 20KCB248). No apparent impacts to any Required Debris HARBOR Basin Vactor water bodies. BWSC crews disinfected area and vactoring impacted catch basins. Point repairs being made to broken lines in area. Table 12. Sanitary Sewer Overflows (SSOs) in Database 07/01/2020 - 12/31/2020

Table 12. All SSOs, CSOs and Building Private Property Backups During Reporting Period Estimated Volume of Spill Estimated Estimated Estimated Spill Estimated Spill Nearest Estimated Vol. Basis for Estimated Volume Bldg Initial Contact Initial Contact Appearance SSO Due to Estimated Spill Spill Start Spill End Spill End Duration Spill Rate Estimated Total Recovered Downstream Distance to Did SSO Sewage to CB Estimate Outfall to Rec. Water Basis for EPA DEP Corrective Action Corrective Action Last SSO at Measures to Prevent Number Street Neighborhood Notification Source Date Time SSO Type Point Description of Problem SSO Source Capacity? Start Date Time Date Time (min) (gpm) Spill Volume (gal) (gal) CB Nearest CB (ft) Reach CB? (gal) (CB) Facility ID Receiving Water Body (gal) Estimate (WB) Notified Notified Containment Cleanup Address Recurrence BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 85-gallons SSO in the basement of #4374 Washington Street due to blocked private Disinfection TELEPHONE CALL sewer lateral. SSO was pumped out to street and Private Vactored Catch Owner 36 4374 WASHINGTON ST ROSLINDALE 11/01/20 19:00 Private Basement NO 11/01/20 19:00 11/01/20 20:00 60 1.42 85 85 10ECB241 50 YES 85 Visual 0 Visual YES YES Owner Responsibility FROM PUBLIC went into catch basin 10ECB241. BWSC crew Lateral Basin Responsibility Vactor disinfected area and vactored the impacted catch basin. Property owner's plumber cleared the blockage in the private sewer lateral. No apparent impacts to any water bodies. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #86 Ashmont Street due to a blocked or broken private SOUTH TELEPHONE CALL sewer lateral. No impacts to any catch basins or Private Owner 37 86 ASHMONT ST 11/02/20 08:30 Private Basement NO 11/02/20 08:30 11/02/20 12:00 210 0.05 10 10 11JCB144 30 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility DORCHESTER FROM PUBLIC water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 20-gallon SSO in the basement of #29 Tileston Street due to a blocked or broken private Further Investigation sewer lateral. No impacts to any catch basins or TELEPHONE CALL Private Required 38 29 TILESTON ST CENTRAL 11/13/20 08:00 Private Basement water bodies, contained in basement. Property NO 11/13/20 08:00 11/13/20 12:00 240 0.08 20 20 25KCB499 10 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC Lateral Owner owner is responsible for cleaning the impacted Responsibility basement area. Lateral inspection to be performed to further investigate. Lateral may have been capped/disconnected by recent BWSC Construction Dept work. BWSC 18-inch combined sewer line stopped on arrival. BWSC crew jetted and vactored line and cleared a grease blockage. Approximately 20-gallons from SSO entered the basement of #257 Hanover TELEPHONE CALL Further Investigation 39 257 HANOVER ST CENTRAL 11/15/20 08:40 Commission Basement Street. Property owner is responsible for cleaning FOG NO 11/15/20 08:40 11/15/20 11:20 160 0.13 20 20 23KCB684 150 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Required the impacted basement area. No impacts to any catch basins or water bodies, containted to basement. Follow up made to inspect commercial grease traps in the area. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 50-gallons from SSO surfaced from private sewer cleanout and went into catch basin Plumbing Private COMBINED MWRA - DEER Vactored Catch Disinfection Owner 40 140 CHARLAME ST ROXBURY MAYOR'S OFFICE 11/18/20 10:34 Private 17ICB142 due to blocked private sewer lateral at NO 11/18/20 10:34 11/18/20 15:00 266 0.19 50 50 17ICB42 20 YES 50 Visual 0 Visual YES YES 09/28/18 Fixture Lateral SEWER ISLAND Basin Vactor Responsibility #140-150 Charlame Street. BWSC crew disinfected area and vactored the impacted catch basin. Property owner's plumber arrived and cleared the blockage in the private sewer lateral. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 15-gallon SSO in the basement of #198 Itasca Street due to a blocked private sewer TELEPHONE CALL lateral. No impacts to any catch basins or water Private Owner 41 198 ITASCA ST MATTAPAN 11/19/20 10:24 Private Basement NO 11/19/20 10:24 11/19/20 13:25 181 0.08 15 15 9HCB26 10 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC bodies, contained in basement. Property owner is Lateral Responsibility responsible for cleaning the impacted basement area. Owner's plumber conducted a lateral inspection and cleared the blockage in the private sewer lateral. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 60-gallon SSO in the basement of #46 Mount Everett Street due to a blocked or broken private sewer lateral. No impacts to any catch basins SOUTH TELEPHONE CALL Private Owner 42 46 MOUNT EVERETT ST 11/19/20 10:21 Private Basement or water bodies, contained in basement. Property NO 11/19/20 10:21 11/19/20 11:45 84 0.71 60 60 15JCB84 220 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility 01/07/19 DORCHESTER FROM PUBLIC Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber for a lateral inspection. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 75-gallon SSO in the basement of #218 Arborway due to a blocked or broken private TELEPHONE CALL sewer lateral. No impacts to any catch basins or Private Owner 43 218 ARBORWAY JAMAICA PLAIN 11/22/20 13:39 Private Basement NO 11/22/20 13:39 11/22/20 14:45 66 1.14 75 75 15FCB122 50 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 25-gallon SSO in the basement of #190 High Street due to a blocked or broken private TELEPHONE CALL sewer lateral. No impacts to any catch basins or Private Owner 44 190 HIGH ST CENTRAL 11/23/20 12:02 Private Basement NO 11/23/20 12:02 11/23/20 14:00 118 0.21 25 25 24LCB72 15 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 90-gallon SSO in the basement of #1249 Boylston Street due to a internal plumbing FENWAY / TELEPHONE CALL Private Owner 45 1249 BOYLSTON ST 12/03/20 15:31 Private Basement problem. No impacts to any catch basins or water NO 12/03/20 15:31 12/03/20 19:00 209 0.43 90 90 22HCB155 15 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility KENMORE FROM PUBLIC Lateral Responsibility bodies, contained in basement. Property owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the internal plumbing problem. BWSC 8-inch and 24-inch sanitary sewer lines surcharged upon arrival and departure due to a heavy rain event. Approximately 400-gallons from Further Investigation NORTH TELEPHONE CALL the SSO entered the basement of #299 Hancock Inflow/ 46 299 HANCOCK ST 12/05/20 22:25 Commission Basement YES 12/05/20 22:25 12/05/20 23:30 65 6.15 400 400 15KCB90 70 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility Required DORCHESTER FROM PUBLIC Street. Property owner is responsible for cleaning Infiltration Unique Occurance the basement area. No impact to any catch basins or water bodies, contained to basement. Notified Mayor's Office. BWSC 12-inch sanitary sewer line stopped upon arrival. BWSC crew jetted and cleared a grease blockage. Approximately 50-gallons from the SSO entered the basement of #45 Homes Avenue. SOUTH TELEPHONE CALL Property owner is responsible for cleaning the Further Investigation 47 45 HOMES AV 12/05/20 20:23 Commission Basement FOG NO 12/05/20 20:23 12/05/20 21:30 67 0.75 50 50 14JCB178 100 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility DORCHESTER FROM PUBLIC impacted basement area. No impact to any catch Required basins or surface water bodies, contained to basement. Follow up made to check sewer line conditions with televised survey. SSO occurred during heavy rain event on 12/5/2020. Table 12. Sanitary Sewer Overflows (SSOs) in Database 07/01/2020 - 12/31/2020

Table 12. All SSOs, CSOs and Building Private Property Backups During Reporting Period Estimated Volume of Spill Estimated Estimated Estimated Spill Estimated Spill Nearest Estimated Vol. Basis for Estimated Volume Bldg Initial Contact Initial Contact Appearance SSO Due to Estimated Spill Spill Start Spill End Spill End Duration Spill Rate Estimated Total Recovered Downstream Distance to Did SSO Sewage to CB Estimate Outfall to Rec. Water Basis for EPA DEP Corrective Action Corrective Action Last SSO at Measures to Prevent Number Street Neighborhood Notification Source Date Time SSO Type Point Description of Problem SSO Source Capacity? Start Date Time Date Time (min) (gpm) Spill Volume (gal) (gal) CB Nearest CB (ft) Reach CB? (gal) (CB) Facility ID Receiving Water Body (gal) Estimate (WB) Notified Notified Containment Cleanup Address Recurrence BWSC 10-inch sanitary sewer line stopped on arrival. BWSC crew jetted and cleared a debris blockage in the sewer line. Approximately 30-gallons from the SSO entered the basement of #9 Perkins Avenue. TELEPHONE CALL Further Investigation 48 9 PERKINS AV HYDE PARK 12/13/20 17:59 Commission Basement Property owner is responsible for cleaning the Debris NO 12/13/20 17:59 12/13/20 22:40 281 0.11 30 30 5FCB189 20 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC Required impacted basement area. No impact to any catch basins or water bodies, contained to basement. Follow up made to clean and televise sewer line to check conditions. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 20-gallon SSO in the basement of #32 Sheridan Street due to a blocked or broken private TELEPHONE CALL sewer lateral. No impacts to any catch basins or Private Owner 49 32 SHERIDAN ST JAMAICA PLAIN 12/21/20 14:00 Private Basement NO 12/21/20 14:00 12/21/20 15:00 60 0.33 20 20 17GCB113 45 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC water bodies, contained in basement. Property Lateral Responsibility owner is responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 1-gallon SSO surfaced in the front yard of #39 Forbes Street due to a blocked or broken TELEPHONE CALL private sewer lateral. Dye tested to confirm source. Private Owner 50 39 FORBES ST JAMAICA PLAIN 12/23/20 15:37 Private Ground NO 12/23/20 15:37 12/23/20 18:45 188 0.01 1 0 17GCB138 350 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC No impacts to any catch basins or water bodies Lateral Responsibility contained to front yard. Property owner is responsible for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber for a lateral inspection. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 10-gallon SSO in the basement of #36 Winston Road due to a internal plumbing problem. TELEPHONE CALL No impacts to any catch basins or water bodies, Private Owner 51 36 WINSTON RD MATTAPAN 12/25/20 09:20 Private Basement NO 12/25/20 09:20 12/25/20 10:10 50 0.20 10 10 11ICB136 25 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility FROM PUBLIC contained in basement. Property owner is Lateral Responsibility responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the internal plumbing problem. Owner will call a plumber. BWSC lines down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 40-gallon SSO in the basement of #37 Alicia Road due to a blocked or broken private sewer SOUTH TELEPHONE CALL lateral. No impacts to any catch basins or water Private Owner 52 37 ALICIA RD 12/26/20 19:30 Private Basement NO 12/26/20 19:30 12/26/20 22:55 205 0.20 40 40 10JCB146 80 NO 0 Visual 0 Visual NO NO None Required Owner Responsibility DORCHESTER FROM PUBLIC bodies, contained in basement. Property owner is Lateral Responsibility responsible for cleaning the impacted basement area and for getting a plumber to clear/repair the blocked/broken private sewer lateral. Owner will call a plumber. BWSC line down and running upon arrival and departure. BWSC crew jetted line past connection. Approximately 2-gallon SSO discharged from a pipe in the back porch/back yard in the rear of #112 Elm TELEPHONE CALL Street due to blocked or broken private plumbing. Private Owner 53 112 ELM ST CHARLESTOWN 12/28/20 10:30 Private Pipe NO 12/28/20 10:30 12/28/20 11:55 85 0.02 2 0 28KCB147 25 NO 0 Visual 0 Visual YES YES None Required Owner Responsibility FROM PUBLIC No impacts to any catch basins or water bodies Lateral Responsibility contained to back yard. Property owner is responsible for getting a plumber to clear/repair the blocked/broken private plumbing. Owner will call a plumber. BWSC 12-inch sanitary sewer line stopped on arrival. BWSC crews jetted and vactored line and removed heavy gravel debris, sewer line broken. Approximately 500-gallons from the SSO in the FENWAY / TELEPHONE CALL Collapsed Further Investigation 54 77 AVE LOUIS PASTEUR 12/28/20 13:53 Commission Basement basement of #77 Louis Pasteur Avenue. No impacts NO 12/28/20 13:53 12/28/20 19:00 307 1.63 500 500 21HCB33 50 NO 0 Visual 0 Visual YES YES Excavation Owner Responsibility KENMORE FROM PUBLIC Pipe Required to any catch basins or water bodies, contained in basement. Property owner cleaned the impacted basement area. BWSC contractor to complete repairs to broken 12-inch sanitary sewer line. Table 13. Non-Reportable Building/Private Property Backup Events 07/01/2020 - 12/31/2020 Date: Location: 1 07/06/20 249 MAVERICK ST, EAST BOSTON 2 07/09/20 254 MARION ST, EAST BOSTON 3 07/15/20 9 EMMONS ST, EAST BOSTON 4 07/17/20 1 HARTFORD ST, ROXBURY 5 07/17/20 336 MERIDIAN ST, EAST BOSTON 6 07/30/20 556 COLUMBIA RD, NORTH DORCHESTER 7 08/01/20 99 BLOOMFIELD ST, SOUTH DORCHESTER 8 08/10/20 752 EAST FIFTH ST, SOUTH BOSTON 9 08/16/20 10 CROWELL ST, MATTAPAN 10 08/31/20 5 CHEEVER CT, EAST BOSTON 11 09/08/20 96 HANCOCK ST, NORTH DORCHESTER 12 09/14/20 45 BROOKS ST, EAST BOSTON 13 09/15/20 196 SALEM ST, CENTRAL 14 09/21/20 39 ALMONT ST, MATTAPAN 15 09/27/20 49 LYON ST, SOUTH DORCHESTER 16 10/01/20 168 CAMBRIDGE ST, CENTRAL 17 10/04/20 3 WORCESTER SQ, SOUTH END 18 10/17/20 80 MOUNT PLEASANT AV, ROXBURY 19 10/19/20 264 HYDE PARK AV, ROSLINDALE 20 11/02/20 86 ASHMONT ST, SOUTH DORCHESTER 21 11/13/20 29 TILESTON ST, CENTRAL 22 11/19/20 198 ITASCA ST, MATTAPAN 23 11/19/20 46 MOUNT EVERETT ST, SOUTH DORCHESTER 24 11/22/20 218 ARBORWAY, JAMAICA PLAIN 25 11/23/20 190 HIGH ST, CENTRAL 26 12/03/20 1249 BOYLSTON ST, FENWAY / KENMORE 27 12/21/20 32 SHERIDAN ST, JAMAICA PLAIN 28 12/25/20 36 WINSTON RD, MATTAPAN 29 12/26/20 37 ALICIA RD, SOUTH DORCHESTER Table No. 15 - Construction Site Inspections 7/1/20 - 12/31/20

PROJECT_NO ADDRESS_NUMBER COMPLETE_STREET_NAME NEIGHBORHOOD_CODE NOI_NPDES_TRACK_NO INSPECTION_DATE 19147 591 Morton Street MATP MAR1001H7 8/12/2020 19422 160 Pleasant Street DORC MAR1002FX 8/12/2020 19610 2 H Street SBOS MAR1002OI 8/12/2020 19527 466 River Street MATP MAR1002RT 8/12/2020 19147 591 Morton Street MATP MAR1001H7 9/2/2020 19522 200 Seaport Blvd SBOS MAR1002FU 9/2/2020 20044 815 Columbus Avenue SBOS MAR1002HU 9/2/2020 19526 665 Commonwealth Avenue ALBR MAR1002LD 9/2/2020 18594 137 Amory Street ROXB MAR1002LC 9/2/2020 18605 25 Whittier Street ROXB MAR1002OJ 9/2/2020 19208 131 Condor Street EBOS MAR1002G5 9/2/2020 19325 103 Mercer Street SBOS MAR1002PJ 9/7/2020 18636 454 Freeport Street DORC MAR1002PU 9/7/2020 19147 591 Morton Street MATP MAR1001H7 9/18/2020 19522 200 Seaport Blvd SBOS MAR1002FU 10/13/2020 19147 591 Morton Street MATP MAR1001H7 10/13/2020 19610 2 H Street SBOS MAR1002OI 11/5/2020 20136 2 Alger Street SBOS MAR1002P0 11/5/2020 TABLE 17. INDUSTRIAL FACILITIES INSPECTIONS AND ENFORCEMENT 7/1-12/31/20.

Inspection List Report

1/19/2021 BWSC\howellbm UMAX-SQL-02 Industrial stormwater survey Start Date: 7/1/2020 End Date: 12/31/2020

FACILITY NAME CUSTOMER# SERVICE ADDRESS TYPE MBTA 1187718 275 DORCHESTER AV BREWERY MAIN BLOCK LLC 1235974 6SOUTH BISMARCK BOSTON, ST MA 02127- KINETIC RTLY TR. 1304919 18JAMAICA ARBORETUM PLAIN, RDMA 02130- THE WINHALL COMPANIES 1114680 129ROSLINDALE, SOUTH ST MA 02131- JEFFREY L CRUSE 1265509 57BOSTON, SOUTHERN MA 02111-2837 AV MBTA 1137892 36DORCHESTER, ARLINGTON MAAV 02124- WILLIAM SASSER 1421693 24CHARLESTOWN, PORTER ST MA 02129- CITY OF BOSTON - DPW 1472926 58JAMAICA GIBSON PLAIN, ST MA 02130- MBTA 1138284 0DORCHESTER, ACCESS RD MA 02122- BOSTON SAND & GRAVEL 1138293 40BOSTON, BUNKER MA HILL 02128-2011 US VI TOWERS POINT LLC 1185926 33INDUSTRIAL WORMWOOD PARK ST TYLER ST REALTY TRUSTEE 1115562 81BOSTON, TYLER MAST 02210-1618 DB PEARL QALICB LLC 1238069 196BOSTON, QUINCY MA ST02111-1833 CITY OF BOSTON - DPW 1238230 150ROXBURY, HANCOCK MA 02121-1921ST MBTA 1258733 47DORCHESTER, DICKENS ST MA 02125- CHRIST P ANTON 1402982 1DORCHESTER, MOUNT VERNON MA 02122-ST EDWARD JAGIELLO 1474322 90DORCHESTER, TENEAN ST MA 02125- MBTA 1474340 0DORCHESTER, TENEAN ST MA 02122- COMMONWEALTH WORLDWIDE 1701840 250DORCHESTER, EVERETT ST MA 02122- US POSTAL SERVICE 1140475 33ALLSTON, DORCHESTER MA 02134-1126 AV MBTA 1140930 421BOSTON, ALBANY MA ST 02205-0001 CUBESMART LP 1706705 130BOSTON, LINCOLN MA 02118-2506ST BOSTON RED SOX 1166441 4BRIGHTON, YAWKEY WY MA 02135-1315 MBTA 1336762 69BOSTON, SAINT MAEDWARD 02215-3409 RD DCR HARBOR REGION 1475663 475EAST NEPONSET BOSTON, MAAV 02128- MATEP,LLC 1142246 474DORCHESTER, BROOKLINE MA AV 02122- HOUGHTON CHEMICAL CORP 1309063 52BOSTON, CAMBRIDGE MA 02215-5415 ST CITY OF BOSTON - DPW 1136800 338ALLSTON, EAST EAGLEMA 02134-1850 ST AMERICOLD 493400 MS#12 1142869 100EAST WIDETT BOSTON, CIR MA 02128- BULGROUP PROPERTIES LP 1136884 175BOSTON, WILLIAM MA 02118-2805F MCCLELLAN BLAUER MFG CO. INC. 1282484 20HWY ABERDEEN ST CHURCH OF SCIENTOLOGY OF 1704125 143BOSTON, EVERETT MA 02215-3872ST BOSTO ALLSTON, MA 02134-1314 Inspection List Report

1/19/2021 BWSC\howellbm UMAX-SQL-02 Industrial stormwater survey Start Date: 7/1/2020 End Date: 12/31/2020

MBTA 1270772 1672R BLUE HILL AV CITY OF BOSTON - DPW 1555134 58MATTAPAN, DANA AV MA 02126 MBTA 1724653 2203HYDE COMMONWEALTH PARK, MA 02136-2728 AV MBTA 1292769 9BRIGHTON, GLENVILLE MA TER 02135-3853 ONE NOTT ST. REALTY TRUST 1272810 2ALLSTON, SECOND MANEW 02134-2803 WY VORTEX PHARMACEUTICALS 1110264 1HYDE HARBOR PARK, ST MA 02136-2911 MASSPORT 1146190 95BOSTON, FARGO MA ST 02210-2359 SHAUGHNESSY, J J 1146236 346BOSTON, D ST MA 02210-2118 DCR-BOSTON REGION 1273272 1609SOUTH RIVER BOSTON, ST MA 02127- 76 ASHFORD STREET REALTY 1294090 76HYDE ASHFORD PARK, MAST 02136-1635 TRUST ALLSTON, MA 02134-1816 MBTA 1187341 696 R EAST FIRST ST MBTA 1187718 275SOUTH DORCHESTER BOSTON, MA AV 02127- DEACON TRANSPORTATION 1187802 376SOUTH DORCHESTER BOSTON, MA AV 02127- LNB REALTY CORP 1344651 7SOUTH SHERMAN BOSTON, ST MA 02127- ROGERSON ORTHOPEDIC 1147524 483CHARLESTOWN, SOUTHAMPTON MA 02129-ST APPLIANCE SOUTH BOSTON, MA 02127- HIGHLAND SPRAGUE ASSOC LP 1180779 75 SPRAGUE ST CITY OF BOSTON - DPW 1295231 315HYDE WESTERN PARK, MA AV 02136-2021 DEPT CONSERVATION & 1202189 38BRIGHTON, NEW HEATH MA 02135-1004ST RECREATION JAMAICA PLAIN, MA 02130- CITY OF BOSTON - DPW 1658450 311 GARDNER ST 120 BRAINTREE ST LLC 1296162 120WEST BRAINTREE ROXBURY, ST MA 02132 MERCK RESEARCH CENTER 1182515 33ALLSTON, AVE LOUIS MA 02134-1604PASTEUR 931 MASS AVE RLTY TRUST 1173249 911BOSTON, MASSACHUSETTS MA 02115-5727 AV CITY OF BOSTON - DPW 1203160 268BOSTON, HIGHLAND MA 02118-2608 ST MBTA 1235493 3600ROXBURY, WASHINGTON MA 02119-1241 ST CHELSEA DIVISION LLC 1235682 3371JAMAICA WASHINGTON PLAIN, MA ST02130- ZFT LLC 1190161 26JAMAICA CHESTERTON PLAIN, MAST 02130- BREWERY DEVELOPMENT CO 1235969 6ROXBURY, BISMARCK MA ST 02119-2906 BREWERY MAIN BLOCK LLC 1235974 6JAMAICA BISMARCK PLAIN, ST MA 02130- MBTA 1190465 234JAMAICA SOUTHAMPTON PLAIN, MA 02130-ST CITY OF BOSTON - DPW 1190511 400BOSTON, FRONTAGE MA 02118-2723 RD BOSTON, MA 02118-2807 12/31/2020

62 Total Inspections TYPE SERIAL SIZE LOCATION BFD HAZARD INS DATE 8/11/2020 9/15/2020 9/21/2020 8/24/2020 9/4/2020 8/26/2020 9/14/2020 9/2/2020 8/27/2020 9/11/2020 9/11/2020 8/24/2020 9/18/2020 9/2/2020 8/25/2020 9/4/2020 8/10/2020 8/12/2020 9/10/2020 9/30/2020 8/11/2020 8/10/2020 9/30/2020 8/25/2020 9/21/2020 9/8/2020 9/10/2020 9/3/2020 9/4/2020 9/3/2020 9/10/2020 9/16/2020 12/31/2020

8/27/2020 9/1/2020 8/27/2020 8/27/2020 9/17/2020 9/17/2020 9/22/2020 8/31/2020 9/9/2020 9/8/2020

8/25/2020 8/11/2020 8/26/2020 9/30/2020 8/31/2020

9/17/2020 9/1/2020 9/9/2020

9/1/2020 9/8/2020 10/5/2020 9/14/2020 9/2/2020 8/12/2020 8/12/2020 9/18/2020 9/17/2020 9/15/2020 8/11/2020 9/3/2020 RESULT Ins Result WORKER Letter 1B Surveyed erricor Letter 3A Surveyed erricor Letter 3 Surveyed erricor Letter 0 Closed erricor Letter 3A Surveyed erricor Letter 1B Surveyed erricor Letter 1 Surveyed erricor Letter 1 Surveyed erricor Letter 1A Surveyed erricor Letter 1B Closed erricor Letter 0 Closed erricor Letter 3A Surveyed erricor Letter 3 Surveyed erricor Letter 1 Surveyed erricor Letter 3A Surveyed erricor Letter 0 Closed erricor Letter 3A Surveyed erricor Letter 3 Surveyed erricor Letter 3A Surveyed erricor Letter 1 Surveyed erricor Letter 1B Surveyed erricor Letter 3 Surveyed erricor Letter 3 Surveyed erricor Letter 1A Surveyed erricor Letter 1 Surveyed erricor Letter 1B Surveyed erricor Letter 1B Surveyed erricor Letter 3 Surveyed erricor Letter 3A Surveyed erricor Letter 3 Surveyed erricor Letter 3 Surveyed erricor Letter 0 Closed erricor Letter 3A Surveyed erricor Letter 1 IFSPPP - Letter 0 erricor Letter 3A Surveyed erricor Letter 3A Surveyed erricor Letter 0 Closed erricor Letter 3A Surveyed erricor Letter 1A Surveyed erricor Letter 1A Surveyed erricor Letter 1A Surveyed erricor Letter 0 Closed erricor

Letter 1B Surveyed erricor Letter 1B Surveyed erricor Letter 1B Surveyed erricor Letter 0 Closed erricor Letter 3A Surveyed erricor

Letter 0 Closed erricor Letter 1A Surveyed erricor Letter 1A Surveyed erricor

Letter 1 Surveyed erricor Letter 3 Surveyed erricor Letter 3 Surveyed wattsd Letter 0 Closed erricor Letter 1 Surveyed erricor Letter 2 Surveyed erricor Letter 0 Closed erricor Letter 3A Surveyed erricor Letter 1 Surveyed erricor Letter 0 Closed erricor Letter 1B Surveyed erricor Letter 2 Surveyed erricor Table 18. PUBLIC BMP/GI&LID Project Status July 1, 2020 - December 31, 2020 Phase / Status Project Public Agency Planning Completed Design Completed Bid Construction Completed 1 3 Tributary Areas - Canterbury Brook BWSC 100% Q1 (2018) 2 Herter Park - Subsurface Gravel Filter BWSC / DCR 75% 3 Educational Signage - Audubon Circle BWSC 100% Q1 (2018) 4 Educational Signage - Central Square BWSC 100% Q1 (2018) 5 Educational Signage - Remainder BWSC 100% Q4 (2018) 6 GI at 5 BPS - Ellis BWSC/ Boston Public Schools 100% Q1 (2018) Q3 (2018) 100% 7 GI at 5 BPS - Jackson Mann BWSC/ Boston Public Schools 100% Q1 (2018) Q3 (2018) 100% 8 GI at 5 BPS - Kennedy BWSC/ Boston Public Schools 100% Q1 (2018) Q3 (2018) 100% 9 Harrison Avenue - Enhanced Tree Trench BWSC / Boston Public Works 100% Q2 (2018) Q3 (2018) 100% Q2 (2019) 10 On-Call GI/LID - Codman Square* BWSC / Boston Public Works / BTD 100% Q4 (2020) 11 On-Call GI/LID - Coolidge Road* BWSC / PWD / BPDA / CRWA 45% 12 On-Call GI/LID - New England Avenue* BWSC / Boston Public Works / BTD 100% 40% 13 Daisy Field - Subsurface Gravel Filter BWSC / Boston Parks Dept. 60% 14 South Street and Bussey Street BWSC / Boston Public Works 100% Q1 (2018) 100% 15 Audubon Circle BWSC / Boston Public Works 100% Q2 (2019) 16 Central Square BWSC / Boston Public Works / BTD / BPRD 100% Q2 (2019) 17 GI at 5 BPS - Hernandez School BWSC/ Boston Public Schools 100% Q2 (2018) 18 GI at 5 BPS - Irving School BWSC/ Boston Public Schools 100% Q2 (2018)

*On-Call GI/LID refers to work performed by BWSC contractor to design GI/LID for ongoing projects. TABLE 19. PRIVATE BMP/GI&LID Completed Projects July 1, 2020 - December 31, 2020 PROJECT_NO STREET ADDRESS_NO STORMWATER INFILTRATION_SYSTEM PROJECT_AREAEXISTING_IMPERVIOUS_AREAPROPOSED_IMPERVIOUS_AREAREQ_INFILTRATION_CAPACITYPROPOSED_INFILTRATION_CAPACITY INSPECTION DATE 13234 WASHINGTON ST 4884 4004-4006 1 LEACHING BASIN 4860 4860 4860 405 432.5 7/17/2020 15400 SPRING ST WROX 3967 312 1 STORMTECH CHAMBERS 8678 8678 8678 647 734 12/29/2020 17042 MOUNT VERNON ST WROX 2962 130 1 CULTEC CHAMBER 14800 3679 3679 307 1534 9/4/2020 17281 TALBOT AV SDOR 4105 332 1 DRYWELL 5851 0 4765 488 577 9/17/2020 17384 HIGHLAND ST ROXB 2143 162 0 PERFORATED PIPE 15203 0 3427 286 298 8/25/2020 17494 BALINA PL MATP 392 7-11 1 PERFORATED PIPE 7475 0 7475 623 809 7/23/2020 17502 HUMBOLDT AV ROXB 2229 249 1 CULTEC CHAMBER 4146 1750 1750 146 216 8/26/2020 17519 WASHINGTON ST ROXB 4398 3012 1 MULTIPLE 30300 30300 31250 2604 2688.7 12/9/2020 18016 HUNTINGTON AV FEKE 2239 270 1 CULTEC CHAMBER 8607 6946 6946 579 617 10/14/2020 18151 POTOMAC ST WROX 3367 62 1 CULTEC CHAMBER 15267 2163 3424 285 1556 12/1/2020 18185 HUMMINGBIRD LN MATP 7819 2 1 MULTIPLE 22725 0 10084 840 953 10/9/2020 18458 BURTON ST ALBR 754 67 1 DRYWELL 2864 930 930 77.5 224.5 7/14/2020 18481 WENSLEY ST JAPL 4449 21 1 PERFORATED PIPE 2049 0 2049 178 197 12/23/2020 18539 GLENCOE ST ALBR 1836 9 1 STORMTECH CHAMBERS 10000 8345 8345 695 706.4 8/14/2020 18554 COLGATE RD ROSL 1063 34 1 CULTEC CHAMBER 3895 0 2400 200 254 8/10/2020 18595 LEE ST JAPL 2494 20 1 MULTIPLE 10720 3995 3995 333 402 7/15/2020 19112 UNION ST ALBR 4250 95 1 CULTEC CHAMBER 1567 776 757 41 48.5 11/23/2020 19150 SEAVER ST ROXB 3838 18-20 1 STORMTECH CHAMBERS 5880 3574 3574 298 334 12/11/2020 19190 MURRAY HILL RD ROSL 2980 46 1 CULTEC CHAMBER 4000 0 2315 386 461 7/14/2020 19195 MARMION ST ROXB 2720 46 1 STORMTECH CHAMBERS 3456 0 3070 256 448 12/16/2020 19248 VFW PKWY OTHR 4299 1400 1 PERFORATED PIPE 94056 94056 82719 7282 6953 12/14/2020 19265 WASHINGTON ST ALBR 4391 101 1 LEACHING BASIN 5272 5272 5272 440 2360 12/18/2020 19284 MORROW RD ALBR 2927 14 1 STORMTECH CHAMBERS 4080 2825 2825 235 261 8/5/2020 19316 ESMOND ST ROXB 1550 4-6 1 CULTEC CHAMBER 7920 5329 5329 444 450 12/14/2020 19320 ELLINGTON ST ROXB 1489 35 1 DRYWELL 3566 1986 1986 170 276 7/6/2020 19321 SHEPARD ST ALBR 3878 38 1 CULTEC CHAMBER 5830 5830 3676 306 685 8/26/2020 19336 BLUE HILL AV MATP 567 682 1 STORMTECH CHAMBERS 5870 4075 4075 339 367 8/13/2020 19370 IPSWICH ST FEKE 2276 189 1 LEACHING BASIN 22137 22137 20157.4 1679.8 1687.2 9/8/2020 19386 MANSFIELD ST ALBR 2676 54 1 DRYWELL 2870 0 2230 186 186 12/7/2020 19397 JAMAICA ST JAPL 2296 79 1 DRYWELL 3108 1358 1358 113.2 224.5 7/8/2020 19481 TALBOT AV SDOR 4105 316-324 1 STORMTECH CHAMBERS 4121 3364 3364 280 334 8/31/2020 19495 HYDE PARK AV ROSL 2250 375 1 DRYWELL 4006 2365 2365 197 220 8/29/2020 19541 ETHEL ST ROSL 1558 7 1 CULTEC CHAMBER 8025 1068 3536 294 329 9/9/2020 20018 WAVERLY ST ALBR 4412 54 1 STORMTECH CHAMBERS 5500 1541 3826 319 415 10/14/2020 FIGURE 1 VERIFIED ILLICIT DISCHARGES AND SEWER SYSTEM OVERFLOWS DURING REPORTING PERIOD 6/01/20 - 12/31/20

SSO Work Orders Commission Caused (16) ² ^ ^ Private Caused (38) ^ Illicit Connection Status # Corrected/Repaired (5) # Outstanding (11) ^ ^ ^ Charlest^own ^^ E^ast Boston ^ ^ ^ Centra^l # ^ ^ Back Bay/B^eacon Hill Allston/Brighton ^ ^ ^ Fenway/Ken#more ^ ^ South End ^ ^ South B^oston^ # ^ # ^ ^ #^^ # ^ # ^ North Dorchester ^ # ^ Harbor Islands # Roxbury ^ # ^ Jamaica# Plain ^ ^ ^ ^ # ^ ^ # ^ ^ South Dorchester ^ ^ R^oslindale ^ West Roxbury Mattapan ^ ^ ^ ^

# Hyde Park

0 0.75 1.5 3 Miles APPENDIX A. 2021 REVISED PRIORITY RANKING

2020 Data 2020 Data WEIGHT (w/ WW): 10% 60% 20% 10% WEIGHT (w/o WW): 10% 80% 0% 10% Dry Weather Dry Dry Wet Weather Wet Most Discharge Flow Cond at Weather Weather Dry Flow Cond at Wet Weather Weather Wet Recent Location "sampling Bacteria Bacteria Weather "sampling Bacteria Bacteria Weather Most Recent Insp TOTAL FACILITY IDA CRITERIA: Beach SCORE location" (type) (result) SCORE location" (type) (result) SCORE Pipe/Bldg Insp Date B SCORE SCORE RANKING 28PSDO1 SDO Yes 10 Flow Enterococci 14000 6 Not Required 12/7/2020 0 5.80 1.00 13LSDO090 SDO Yes 10 Flow Enterococci 5100 4 Not Required 1/5/2021 0 4.20 1.00 12LMH304 Interconnection Yes 10 Flow Enterococci 210 2 Not Required 8/12/2014 0 2.60 1.00 12LSDO092 SDO Yes 10 Flow Enterococci 160 2 Not Required 12/4/2014 0 2.60 1.00 29OSDO001 SDO Yes 10 Flow Enterococci 130 2 Not Required 7/25/2016 0 2.60 1.00 12LMH374 Interconnection Yes 10 Dry 0 Flow E.coli 9000 4 3/16/2015 0 1.80 1.00 28NSDO156 SDO Yes 10 Dry 0 Flow Enterococci 2900 4 10/17/2012 0 1.80 1.00 29PSDO44 SDO Yes 10 Flow Enterococci 70 0 Not Required 6/20/2014 0 1.00 1.00 28NSDO207 SDO Yes 10 Flow Enterococci 40 0 Not Required 11/7/2016 0 1.00 1.00 15LSDO088 SDO Yes 10 Flow Enterococci 10 0 Not Required 10/19/2015 0 1.00 1.00 15LSDO089 SDO Yes 10 Flow Enterococci 10 0 Not Required 10/6/2015 0 1.00 1.00 28OSDO25 SDO Yes 10 Flow Enterococci 10 0 Not Required 7/22/2014 0 1.00 1.00 21DMH319 Interconnection No 10 Flow E.coli 41000 8 Not Required 1/6/2021 0 7.40 2.00 20DNP140 Interconnection No 10 Flow E.coli 16000 5 Not Required 1/15/2020 0 5.00 2.00 6DMH97 Interconnection No 10 Flow E.coli 2700 3 Flow E.coli 33000 7 7/19/2016 0 4.20 2.00 20DMH19 Interconnection No 10 Flow E.coli 2400 3 Flow E.coli 7500 4 12/8/2020 0 3.60 2.00 23BMH89 Interconnection No 10 Flow E.coli 1200 3 Not Required 9/24/2018 0 3.40 2.00 23HMH81 Interconnection No 10 StandingWater 1 StandingWater 1 Pre‐Consent Decree 10 2.80 2.00 3FMH56 Interconnection No 10 Flow E.coli 350 2 Not Required 11/9/2015 0 2.60 2.00 20DMH62 Interconnection No 10 Dry 0 Flow E.coli 19000 5 9/16/2019 0 2.00 2.00 2FMH120 Interconnection No 10 Dry 0 Flow E.coli 910 2 9/30/2005 5 1.90 2.00 28IMH15 Interconnection No 10 StandingWater 1 Standing Water 1 7/17/2018 0 1.80 2.00 6CMH117 Interconnection No 10 Dry 0 Flow E.coli 1900 3 5/30/2018 0 1.60 2.00 14EMH36 Interconnection No 10 Dry 0 Flow E.coli 460 2 3/7/2016 0 1.40 2.00 21EMH64 Interconnection No 10 Flow E.coli 30 0 Not Required 9/17/2019 0 1.00 2.00 4FMH90 Interconnection No 10 Flow E.coli 10 0 Flow E.coli 120 0 10/29/2015 0 1.00 2.00 21EMH86 Interconnection No 10 Flow E.coli 10 0 Not Required 3/4/2014 0 1.00 2.00 11BMH49 Interconnection No 10 Dry 0 Dry 2/28/2017 0 1.00 2.00 11ISDO577 SDO No 0 Flow E.coli 80000 10 Not Required 6/9/2020 0 8.00 3.00 15FSDO288 SDO No 0 Flow E.coli 53000 9 Not Required 12/28/2020 0 7.20 3.00 29JSDO212 SDO No 0 Flow Enterococci 48000 9 Not Required 1/6/2021 0 7.20 3.00 19GSDO043 SDO No 0 Flow E.coli 47000 8 Not Required 12/28/2020 0 6.40 3.00 23GSDO132 SDO No 0 Flow E.coli 43000 8 Not Required 4/30/2013 0 6.40 3.00 25MCSO005 CSO No 0 Flow Enterococci 28000 7 Not Required 12/10/2018 0 5.60 3.00 7HSDO285 SDO No 0 Flow E.coli 29000 6 Not Required 2/11/2020 0 4.80 3.00 10LSDO096 SDO No 0 Flow Enterococci 15000 6 Not Required 8/8/2017 0 4.80 3.00 9KSDO101 SDO No 0 Flow Enterococci 10000 6 Not Required 12/12/2019 0 4.80 3.00 21HCSO046‐1 (15GMH290) CSO No 0 Flow E.coli 16000 5 Not Required 6/1/2020 0 4.00 3.00 18GSDO233 SDO No 0 Flow E.coli 11000 5 Not Required 12/8/2020 0 4.00 3.00 6GSDO110 SDO No 0 Flow E.coli 25000 6 Flow E.coli 180 0 7/15/2015 0 3.60 3.00 5GSDO116 SDO No 0 Flow E.coli 6300 4 Flow E.coli 1200 3 3/23/2009 5 3.50 3.00 21HSDO047 SDO No 0 Flow E.coli 7700 4 Not Required 10/25/2018 0 3.20 3.00 6DSDO187 SDO No 0 Flow E.coli 7700 4 Not Required 8/10/2017 0 3.20 3.00 6GSDO109 SDO No 0 Flow E.coli 6800 4 Not Required 6/9/2020 0 3.20 3.00 8JSDO103 SDO No 0 Flow E.coli 6000 4 Not Required 2/7/2017 0 3.20 3.00 6GSDO165 SDO No 0 Flow E.coli 5800 4 Not Required 4/11/2014 0 3.20 3.00 7HSDO105 SDO No 0 Flow E.coli 5100 4 Not Required 6/1/2020 0 3.20 3.00 21HCSO046‐1 (19HMH222) CSO No 0 Flow E.coli 5000 4 Not Required 2/26/2018 0 3.20 3.00 21HCSO046‐1 (23IMH1) CSO No 0 Flow E.coli 5000 4 Not Required 7/30/2019 0 3.20 3.00 22LCSO073 CSO No 0 Flow Enterococci 4300 4 Not Required 8/22/2019 0 3.20 3.00 28LSDO074/28LSDO075/28LSDO076 SDO No 0 Flow Enterococci 4000 4 Not Required 11/7/2018 0 3.20 3.00 28KSDO61 SDO No 0 Flow Enterococci 2600 4 Not Required 1/11/2016 0 3.20 3.00 11MSDO093 SDO No 0 Flow Enterococci 2300 4 Not Required 6/10/2019 0 3.20 3.00 28KSDO010 SDO No 0 Flow Enterococci 2200 4 Not Required 3/13/2019 0 3.20 3.00 21KCSO070 CSO No 0 Flow Enterococci 1800 4 Flow Enterococci 600 3 12/7/2020 0 3.00 3.00 4ESDO69 SDO No 0 Flow E.coli 1800 3 Not Required 1/9/2012 5 2.90 3.00 28LCSO012 CSO No 0 Flow Enterococci 110 2 Not Required NA 10 2.60 3.00 7CSDO006 SDO No 0 StandingWater 1 Flow E.coli >80000 10 3/7/2019 0 2.60 3.00 13DSDO077 SDO No 0 Flow E.coli 3600 3 Not Required 3/19/2019 0 2.40 3.00 24GSDO035 SDO No 0 Flow E.coli 3400 3 Not Required 3/13/2020 0 2.40 3.00 24CSDO39 SDO No 0 Flow E.coli 2600 3 Flow E.coli 1900 3 3/1/2018 0 2.40 3.00 19MCSO082 CSO No 0 Flow Enterococci 690 3 Not Required 8/13/2019 0 2.40 3.00 24CSDO174 SDO No 0 Flow E.coli 410 2 Flow E.coli 3100 3 4/14/2009 5 2.30 3.00 13FSDO11 SDO No 0 Flow E.coli 2700 3 Flow E.coli 340 2 12/24/2018 0 2.20 3.00 21HSDO001 SDO No 0 Flow E.coli 2200 3 Flow E.coli 360 2 1/13/2020 0 2.20 3.00 30PSDO62 SDO No 0 Flow Enterococci 330 2 Not Required 9/20/2012 5 2.10 3.00 26LSDO106 SDO No 0 Dry 0 Flow Enterococci 80000 10 5/1/2018 0 2.00 3.00 6FSDO233 SDO No 0 Submerged 1 Flow E.coli 370 2 Pre‐Consent Decree 10 2.00 3.00 13ESDO175 SDO No 0 Flow E.coli 300 2 Flow E.coli 2600 3 1/14/2015 0 1.80 4.00 5ESDO181 SDO No 0 Dry 0 Flow E.coli 5300 4 Pre‐Consent Decree 10 1.80 4.00 27JSDO044 SDO No 0 StandingWater 1 Submerged 1 NA 10 1.80 4.00 12BSDO10 SDO No 0 Submerged 1 Submerged 1 Pre‐Consent Decree 10 1.80 4.00 6DSDO86 SDO No 0 Submerged 1 Standing Water 1 NA 10 1.80 4.00 12HSDO1 (12HMH26) SDO No 0 StandingWater 1 Standing Water 1 NA 10 1.80 4.00 12HSDO1 (12HMH27) SDO No 0 StandingWater 1 Standing Water 1 Pre‐Consent Decree 10 1.80 4.00 27JSDO096 SDO No 0 StandingWater 1 Standing Water 1 NA 10 1.80 4.00 23LSDO15 SDO No 0 Submerged 1 Not Required NA 10 1.80 4.00 28LSDO077 SDO No 0 CNL 1 Pending NA 10 1.80 4.00 6DSDO184 SDO No 0 StandingWater 1 Cannot Locate 1 Pre‐Consent Decree 10 1.80 4.00 20GSDO161 SDO No 0 Flow E.coli 430 2 Not Required 8/12/2019 0 1.60 4.00 21HSDO045 SDO No 0 Flow E.coli 400 2 Not Required 10/25/2018 0 1.60 4.00 23LSDO202 SDO No 0 Flow Enterococci 380 2 Not Required 12/10/2018 0 1.60 4.00 21MCSO078 CSO No 0 Flow Enterococci 330 2 Not Required 11/25/2019 0 1.60 4.00 8ESDO31 SDO No 0 Flow E.coli 310 2 Not Required 11/18/2015 0 1.60 4.00 8ISDO154 SDO No 0 Flow E.coli 260 2 Not Required 6/3/2019 0 1.60 4.00 19GSDO194 SDO No 0 Flow E.coli 250 2 Not Required 1/16/2020 0 1.60 4.00 21MSDO50 SDO No 0 Flow Enterococci 250 2 Not Required 5/14/2015 0 1.60 4.00 10LSDO094 SDO No 0 Flow Enterococci 180 2 Not Required 6/1/2020 01.604.00 21LCSO076 CSO No 0 Flow Enterococci 140 2 Not Required 1/7/2020 0 1.60 4.00 WEIGHT (w/ WW): 10% 60% 20% 10% WEIGHT (w/o WW): 10% 80% 0% 10% Dry Weather Dry Dry Wet Weather Wet Most Discharge Flow Cond at Weather Weather Dry Flow Cond at Wet Weather Weather Wet Recent Location "sampling Bacteria Bacteria Weather "sampling Bacteria Bacteria Weather Most Recent Insp TOTAL FACILITY IDA CRITERIA: Beach SCORE location" (type) (result) SCORE location" (type) (result) SCORE Pipe/Bldg Insp Date B SCORE SCORE RANKING 23LSDO075 SDO No 0 Flow Enterococci 110 2 Not Required 8/21/2018 0 1.60 4.00 13FSDO96 SDO No 0 Dry 0 Flow E.coli 3500 3 NA 10 1.60 4.00 13FSDO95 SDO No 0 StandingWater 1 Flow E.coli 100 0 NA 10 1.60 4.00 12HSDO92 SDO No 0 Submerged 1 Flow E.coli 30 0 NA 10 1.60 4.00 13BSDO11 SDO No 0 StandingWater 1 Flow E.coli 10 0 Pre‐Consent Decree 10 1.60 4.00 23LCSO062 CSO No 0 StandingWater 1 Flow Enterococci 10 0 NA 10 1.60 4.00 8JSDO102 SDO No 0 Dry 0 Flow Enterococci 9000 5 11/16/2009 5 1.50 4.00 12BSDO124 SDO No 0 Flow E.coli 10 0 Flow E.coli 34000 7 1/20/2020 0 1.40 4.00 9ESDO229 SDO No 0 Dry 0 Flow E.coli 33000 7 4/10/2014 0 1.40 4.00 11BSDO123 SDO No 0 StandingWater 1 Flow E.coli 6000 4 6/3/2019 0 1.40 4.00 13FSDO97 SDO No 0 Dry 0 Flow E.coli 770 2 NA 10 1.40 4.00 9BSDO49 SDO No 0 Dry 0 Flow E.coli 720 2 NA 10 1.40 4.00 26KSDO050 SDO No 0 Dry 0 Flow Enterococci 180 2 NA 10 1.40 4.00 29JSDO029 SDO No 0 Dry 0 Flow Enterococci 160 2 NA 10 1.40 4.00 8KSDO49 SDO No 0 Dry 0 Flow E.coli 9000 4 11/16/2009 5 1.30 4.00 7HSDO347 SDO No 0 Dry 0 Flow E.coli 5600 4 3/25/2009 5 1.30 4.00 1FSDO31 SDO No 0 Dry 0 Flow E.coli 5100 4 12/17/2011 5 1.30 4.00 5FSDO244 SDO No 0 StandingWater 1 Submerged 1 5/19/2009 5 1.30 4.00 5FSDO245 SDO No 0 StandingWater 1 Flow E.coli 3500 3 5/8/2018 0 1.20 4.00 13DSDO078 SDO No 0 StandingWater 1 Flow E.coli 2500 3 3/19/2019 0 1.20 4.00 10BSDO15 SDO No 0 StandingWater 1 Flow E.coli 2500 3 2/12/2020 0 1.20 4.00 25ESDO037 SDO No 0 StandingWater 1 Flow E.coli 2300 3 1/9/2020 0 1.20 4.00 20GSDO164 SDO No 0 Dry 0 Cannot Locate 1 NA 10 1.20 4.00 4FSDO119 SDO No 0 Flow E.coli 230 0 Flow E.coli 2400 3 9/18/2007 5 1.10 4.00 24GSDO034 SDO No 0 Flow E.coli 10 0 Flow E.coli 1300 3 5/18/2009 5 1.10 4.00 9KSDO16 SDO No 0 Dry 0 Flow E.coli 4000 3 4/5/2012 5 1.10 4.00 26FSDO038 SDO No 0 StandingWater 1 Flow E.coli 30 0 1/11/2007 5 1.10 4.00 12BSDO33 SDO No 0 Flow E.coli 10 0 Flow E.coli 10 0 NA 10 1.00 4.00 5ESDO180 SDO No 0 Flow E.coli 10 0 Flow E.coli 20 0 NA 10 1.00 4.00 24LSDO22 SDO No 0 Flow Enterococci 10 0 Not Required NA 10 1.00 4.00 12ESDO418 SDO No 0 StandingWater 1 Flow E.coli 910 2 7/17/2019 0 1.00 4.00 8BSDO122 SDO No 0 StandingWater 1 Flow E.coli 570 2 9/18/2019 0 1.00 4.00 21HSDO002 SDO No 0 StandingWater 1 Flow E.coli 450 2 1/13/2020 0 1.00 4.00 22KCSO068 CSO No 0 StandingWater 1 Flow Enterococci 280 2 11/13/2019 0 1.00 4.00 20GSDO163 SDO No 0 Dry 0 Flow E.coli 120 0 Pre‐Consent Decree 10 1.00 4.00 5FSDO254 SDO No 0 Dry 0 Flow E.coli 20 0 Pre‐Consent Decree 10 1.00 4.00 4FSDO203 SDO No 0 Dry 0 Flow E.coli 10 0 NA 10 1.00 4.00 21HSDO048 SDO No 0 Dry 0 Pending NA 10 1.00 4.00 29PSDO005 SDO No 0 Dry 0 Pending NA 10 1.00 4.00 6DSDO83 SDO No 0 Dry 0 Dry NA 10 1.00 4.00 6DSDO84 SDO No 0 Dry 0 Dry Pre‐Consent Decree 10 1.00 4.00 3ESDO207 SDO No 0 Dry 0 Dry NA 10 1.00 4.00 4FSDO1 SDO No 0 Dry 0 Dry NA 10 1.00 4.00 8ISDO155 SDO No 0 Dry 0 Flow E.coli 700 2 6/2/2009 5 0.90 5.00 8ISDO158 SDO No 0 Dry 0 Flow E.coli 450 2 6/2/2009 5 0.90 5.00 6HSDO106 SDO No 0 Dry 0 Flow E.coli 440 2 9/6/2011 5 0.90 5.00 1ESDO24 SDO No 0 Dry 0 Flow E.coli 390 2 1/18/2012 5 0.90 5.00 9KSDO100 SDO No 0 Flow Enterococci 70 0 Flow Enterococci 4000 4 1/12/2016 0 0.80 5.00 2FSDO93 SDO No 0 StandingWater 1 Submerged 1 11/3/2015 0 0.80 5.00 6DSDO91 SDO No 0 Submerged 1 Submerged 1 12/18/2018 0 0.80 5.00 27JSDO001 SDO No 0 StandingWater 1 Standing Water 1 8/23/2018 0 0.80 5.00 19GSDO199 SDO No 0 StandingWater 1 Standing Water 1 8/22/2013 0 0.80 5.00 23HSDO042 SDO No 0 StandingWater 1 Standing Water 1 1/13/2020 0 0.80 5.00 29JCSO017 CSO No 0 StandingWater 1 Not Required 7/19/2018 00.805.00 24DSDO032 SDO No 0 StandingWater 1 Not Required 11/26/2019 0 0.80 5.00 26JSDO101 SDO No 0 StandingWater 1 Pending 7/22/2019 0 0.80 5.00 26LSDO70 SDO No 0 StandingWater 1 Pending 6/26/2018 0 0.80 5.00 24NCSO003 CSO No 0 StandingWater 1 Pending 5/14/2019 0 0.80 5.00 5CSDO110 SDO No 0 Flow E.coli 210 0 Flow E.coli 1600 3 5/30/2018 0 0.60 5.00 5ESDO182 SDO No 0 Flow E.coli 10 0 Flow E.coli 1200 3 11/18/2015 0 0.60 5.00 4FSDO16 SDO No 0 Flow E.coli 10 0 Flow E.coli 3300 3 7/29/2014 0 0.60 5.00 5ESDO183 SDO No 0 Dry 0 Flow E.coli 4500 3 6/15/2015 0 0.60 5.00 14CSDO9 SDO No 0 Dry 0 Flow E.coli 2900 3 5/13/2014 0 0.60 5.00 8ISDO207 SDO No 0 Dry 0 Flow E.coli 2800 3 3/2/2017 0 0.60 5.00 8JSDO41 SDO No 0 Dry 0 Flow E.coli 2600 3 9/15/2015 0 0.60 5.00 8ISDO209 SDO No 0 Dry 0 Flow E.coli 2100 3 2/22/2017 0 0.60 5.00 30PSDO107 SDO No 0 Flow Enterococci 60 0 Flow Enterococci 70 0 5/18/2009 5 0.50 5.00 23LSDO195 SDO No 0 Flow Enterococci 30 0 Not Required 5/20/2006 5 0.50 5.00 25GSDO041 SDO No 0 Flow E.coli 10 0 Flow E.coli 100 0 5/18/2009 5 0.50 5.00 2FSDO120 SDO No 0 Flow E.coli 10 0 Not Required 10/22/2007 5 0.50 5.00 21CSDO212 SDO No 0 Flow E.coli 10 0 Not Required 3/19/2012 5 0.50 5.00 28KSDO386 SDO No 0 Flow Enterococci 10 0 Not Required 4/21/2011 5 0.50 5.00 29NSDO135 SDO No 0 Flow Enterococci 10 0 Not Required 8/1/2007 5 0.50 5.00 31PSDO84 SDO No 0 Flow Enterococci 10 0 Not Required 5/18/2009 5 0.50 5.00 4FSDO118 SDO No 0 Flow E.coli 10 0 Not Required 8/11/2011 5 0.50 5.00 2FSDO85 SDO No 0 Dry 0 Flow E.coli 230 0 6/11/2012 5 0.50 5.00 4FSDO189 SDO No 0 Dry 0 Flow E.coli 160 0 6/6/2012 5 0.50 5.00 24DSDO150 SDO No 0 Dry 0 Flow E.coli 30 0 1/9/2006 5 0.50 5.00 2ESDO5 SDO No 0 Dry 0 Flow E.coli 20 0 1/9/2012 5 0.50 5.00 7HSDO346 SDO No 0 Dry 0 Not Required 3/24/2009 5 0.50 5.00 8ISDO153 SDO No 0 Dry 0 Dry 6/2/2009 5 0.50 5.00 4ESDO64 SDO No 0 Dry 0 Dry 4/28/2009 5 0.50 5.00 21NCSO80 CSO No 0 Flow Enterococci 10 0 Flow Enterococci 280 2 4/16/2019 0 0.40 5.00 23HSDO040 SDO No 0 Dry 0 Flow E.coli 730 2 1/13/2020 0 0.40 5.00 12FSDO305 SDO No 0 Dry 0 Flow E.coli 580 2 10/27/2015 0 0.40 5.00 8ESDO33 SDO No 0 Dry 0 Flow E.coli 530 2 11/18/2015 0 0.40 5.00 7HSDO348 SDO No 0 Dry 0 Flow E.coli 470 2 5/20/2019 0 0.40 5.00 5GSDO115 SDO No 0 Dry 0 Flow E.coli 390 2 11/16/2015 0 0.40 5.00 6HSDO107 SDO No 0 Dry 0 Flow E.coli 350 2 5/9/2017 0 0.40 5.00 5GSDO112 SDO No 0 Dry 0 Flow E.coli 240 2 11/16/2015 0 0.40 5.00 23LCSO064 CSO No 0 Dry 0 Flow Enterococci 180 2 1/17/2019 0 0.40 5.00 12BSDO14 SDO No 0 Dry 0 Submerged 1 12/11/2018 0 0.20 5.00 11GSDO344 (11GMH247) SDO No 0 Dry 0 Standing Water 1 10/2/2018 0 0.20 5.00 WEIGHT (w/ WW): 10% 60% 20% 10% WEIGHT (w/o WW): 10% 80% 0% 10% Dry Weather Dry Dry Wet Weather Wet Most Discharge Flow Cond at Weather Weather Dry Flow Cond at Wet Weather Weather Wet Recent Location "sampling Bacteria Bacteria Weather "sampling Bacteria Bacteria Weather Most Recent Insp TOTAL FACILITY IDA CRITERIA: Beach SCORE location" (type) (result) SCORE location" (type) (result) SCORE Pipe/Bldg Insp Date B SCORE SCORE RANKING 3ESDO186 SDO No 0 Dry 0 Standing Water 1 8/21/2017 0 0.20 5.00 6GSDO111 SDO No 0 Flow E.coli 230 0 Not Required 9/24/2013 0 0.00 5.00 4FSDO204 SDO No 0 Flow E.coli 110 0 Not Required 8/23/2018 0 0.00 5.00 13FSDO12 SDO No 0 Flow E.coli 110 0 Pending 2/21/2017 0 0.00 5.00 26LSDO084 SDO No 0 Flow Enterococci 100 0 Not Required 12/10/2018 0 0.00 5.00 17FSDO12 SDO No 0 Flow E.coli 90 0 Not Required 1/25/2018 0 0.00 5.00 25LSDO058 SDO No 0 Flow Enterococci 90 0 Not Required 8/27/2018 00.005.00 24LSDO233 SDO No 0 Flow Enterococci 70 0 Not Required 7/22/2019 0 0.00 5.00 9LSDO095 SDO No 0 Flow Enterococci 70 0 Not Required 5/23/2018 0 0.00 5.00 12MSDO091 SDO No 0 Flow Enterococci 60 0 Not Required 5/9/2018 0 0.00 5.00 25DSDO040 SDO No 0 Flow E.coli 60 0 Not Required 9/4/2018 0 0.00 5.00 30JSDO30 SDO No 0 Flow Enterococci 60 0 Not Required 3/12/2015 0 0.00 5.00 6GSDO166 SDO No 0 Flow E.coli 50 0 Flow E.coli 220 0 3/25/2019 0 0.00 5.00 8CSDO25 SDO No 0 Flow E.coli 50 0 Flow E.coli 30 0 7/12/2018 0 0.00 5.00 22KCSO065 CSO No 0 Flow Enterococci 50 0 Pending 1/10/2019 0 0.00 5.00 8CSDO26 SDO No 0 Flow E.coli 40 0 Flow E.coli 10 0 7/12/2018 0 0.00 5.00 23LSDO164 SDO No 0 Flow Enterococci 40 0 Not Required 3/16/2016 00.005.00 29JSDO129 SDO No 0 Flow Enterococci 40 0 Not Required 5/14/2018 0 0.00 5.00 23LSDO196 SDO No 0 Flow Enterococci 30 0 Not Required 6/21/2018 0 0.00 5.00 31OSDO4 SDO No 0 Flow Enterococci 30 0 Not Required 5/2/2013 0 0.00 5.00 21KSDO069 SDO No 0 Flow Enterococci 20 0 Not Required 3/27/2017 0 0.00 5.00 22LSDO580 SDO No 0 Flow Enterococci 20 0 Not Required 1/11/2016 0 0.00 5.00 29MCSO013 CSO No 0 Flow Enterococci 20 0 Not Required 1/23/2020 0 0.00 5.00 29MSDO049 SDO No 0 Flow Enterococci 20 0 Not Required 7/10/2017 0 0.00 5.00 5FSDO117 SDO No 0 Flow E.coli 20 0 Not Required 12/10/2013 0 0.00 5.00 5FSDO253 SDO No 0 Flow E.coli 10 0 Flow E.coli 170 0 7/16/2015 0 0.00 5.00 22CSDO384 SDO No 0 Flow E.coli 10 0 Flow E.coli 100 0 11/12/2015 0 0.00 5.00 3ESDO185 SDO No 0 Flow E.coli 10 0 Flow E.coli 70 0 2/22/2018 0 0.00 5.00 5ESDO184 SDO No 0 Flow E.coli 10 0 Flow E.coli 20 0 2/1/2018 0 0.00 5.00 27LSDO020/27LSDO022 SDO No 0 Flow Enterococci 10 0 Not Required 12/7/2020 0 0.00 5.00 26GSDO01 SDO No 0 Flow E.coli 10 0 Not Required 10/31/2018 0 0.00 5.00 25NCSO004 CSO No 0 Flow Enterococci 10 0 Not Required 7/15/2019 0 0.00 5.00 8ESDO35 SDO No 0 Flow E.coli 10 0 Not Required 2/21/2017 0 0.00 5.00 28LCSO019 CSO No 0 Flow Enterococci 10 0 Not Required 1/14/2019 0 0.00 5.00 26JSDO049 SDO No 0 Flow Enterococci 10 0 Not Required 7/29/2019 0 0.00 5.00 29NCSO014 CSO No 0 Flow Enterococci 10 0 Not Required 6/5/2018 0 0.00 5.00 19LCSO085 CSO No 0 Flow Enterococci 10 0 Not Required 3/21/2017 0 0.00 5.00 26KSDO35 SDO No 0 Flow Enterococci 10 0 Not Required 8/2/2019 0 0.00 5.00 18LCSO086 CSO No 0 Flow Enterococci 10 0 Not Required 1/9/2019 0 0.00 5.00 16LSDO097 SDO No 0 Flow Enterococci 10 0 Not Required 2/3/2020 0 0.00 5.00 16LSDO122 SDO No 0 Flow Enterococci 10 0 Not Required 3/2/2020 0 0.00 5.00 17MSDO33 SDO No 0 Flow Enterococci 10 0 Not Required 12/18/2019 0 0.00 5.00 19LCSO084 CSO No 0 Flow Enterococci 10 0 Not Required 6/21/2018 0 0.00 5.00 21MCSO079 CSO No 0 Flow Enterococci 10 0 Not Required 6/7/2019 0 0.00 5.00 21MSDO010 SDO No 0 Flow Enterococci 10 0 Not Required 1/31/2019 0 0.00 5.00 24LCSO060 CSO No 0 Flow Enterococci 10 0 Not Required 7/25/2019 0 0.00 5.00 25LSDO144 SDO No 0 Flow Enterococci 10 0 Not Required 4/19/2018 0 0.00 5.00 25MSDO006 SDO No 0 Flow Enterococci 10 0 Not Required 6/12/2019 0 0.00 5.00 26KSDO099 SDO No 0 Flow Enterococci 10 0 Not Required 9/29/2015 0 0.00 5.00 26LCSO009 CSO No 0 Flow Enterococci 10 0 Not Required 6/3/2019 0 0.00 5.00 27LCSO010 CSO No 0 Flow Enterococci 10 0 Not Required 12/11/2018 0 0.00 5.00 29NSDO015 SDO No 0 Flow Enterococci 10 0 Not Required 8/5/2019 0 0.00 5.00 30JSDO6 SDO No 0 Flow Enterococci 10 0 Not Required 12/17/2019 0 0.00 5.00 5GSDO116A SDO No 0 Flow E.coli 10 0 Not Required 12/24/2018 0 0.00 5.00 6DSDO57 SDO No 0 Flow E.coli 10 0 Not Required 4/16/2019 0 0.00 5.00 6GSDO108 SDO No 0 Flow E.coli 10 0 Not Required 12/8/2020 0 0.00 5.00 9ESDO243 SDO No 0 Flow E.coli 10 0 Not Required 3/16/2020 0 0.00 5.00 25LCSO057 CSO No 0 Flow Enterococci 10 0 Pending 7/29/2019 0 0.00 5.00 8BSDO126 SDO No 0 Dry 0 Flow E.coli 230 0 1/14/2014 0 0.00 5.00 13ESDO176 SDO No 0 Dry 0 Flow E.coli 180 0 11/2/2015 0 0.00 5.00 8FSDO1 SDO No 0 Dry 0 Flow E.coli 70 0 3/14/2019 0 0.00 5.00 19NCSO081 CSO No 0 Dry 0 Not Required 1/16/2019 0 0.00 5.00 13ESDO174 SDO No 0 Dry 0 Not Required 8/23/2018 0 0.00 5.00 30JSDO19 SDO No 0 Dry 0 Not Required 5/13/2015 0 0.00 5.00 8ISDO156 SDO No 0 Dry 0 Not Required 9/15/2015 0 0.00 5.00 8JSDO50 SDO No 0 Dry 0 Not Required 5/29/2019 0 0.00 5.00 26KSDO254 SDO No 0 Dry 0 Pending 5/7/2018 0 0.00 5.00 26KSDO052 SDO No 0 Dry 0 Pending 5/30/2017 0 0.00 5.00 22KCSO072 CSO No 0 Dry 0 Pending 5/6/2019 0 0.00 5.00 23LSDO074 SDO No 0 Dry 0 Pending 11/14/2018 0 0.00 5.00 28LSDO073 SDO No 0 Dry 0 Pending 8/23/2018 0 0.00 5.00 11GSDO344 (11GMH246) SDO No 0 Dry 0 Dry 10/2/2018 0 0.00 5.00 25MSDO007 SDO No 0 Dry 0 Dry 1/11/2016 0 0.00 5.00 6DSDO85 SDO No 0 Dry 0 Dry 11/18/2015 0 0.00 5.00 26JSDO052 SDO No 0 Dry 0 Dry 1/17/2019 0 0.00 5.00 NOTES: AOutfalls in Bold were prioritized by EPA in 2014 BOutfalls with Date of Last Inspection "NA" were complete based on outfall screening and did not require upstream investgation of manholes or buildings. Outfalls listed as "Pre‐Consent Decree" were completed prior to lodging of the Consent Decree in August 2012.

APPENDIX B: Public Education & Outreach Materials Boston Water and Sewer Commission COVID-19 Update

BWSC customers do not need to worry, the virus is not in your water. Boston Water and Sewer Commission in conjunction with Massachusetts Water Resources Authority regularly tests drinking water for any contaminants. Be assured that we will continue to provide our customers water that meets all health standards. COVID-19 is not in Boston’s drinking water. Keep wipes out of pipes! Remember that your toilet should not be used as a trash can. Do not treat other items like toilet paper. Please do not flush paper towels, “flushable” wipes, napkins, tampons, cotton balls, dental floss or other substances. Flushing nonbiodegradable items can result in backups and overflows. BWSC offices are closed to the public Due to the recent outbreak of COVID-19, Boston Water and Sewer Commission will be closed to the public until further notice. In addition, Neighborhood Site Visits will not be held until further notice. BWSC offers multiple payment methods such as online, by phone, or by mail. Any questions about your account please call 617-989-7800.

980 Harrison Avenue Boston, MA 02119 Emergency Hotline: 617-989-7000

Boston Water and Sewer Commission COVID-19 Update

BWSC customers do not need to worry, the virus is not in your water. Boston Water and Sewer Commission in conjunction with Massachusetts Water Resources Authority regularly tests drinking water for any contaminants. Be assured that we will continue to provide our customers water that meets all health standards. COVID-19 is not in Boston’s drinking water. For BWSC COVID-19 updates please visit www.bwsc.org.

BWSC offices are closed to the public until further notice Due to the recent outbreak of COVID-19, Boston Water and Sewer Commission will be closed to the public until further notice. In addition, Neighborhood Site Visits will not be held until further notice. BWSC offers multiple payment methods such as online, by phone, or by mail. Any questions about your account please call 617-989-7800. In the event of an emergency please call 617-989-7000.

Boston Water and Sewer Commission | 980 Harrison Avenue, Boston, MA 02119 | www.bwsc.org |(617) 989-7000 Keep Wipes out of Pipes! Wipes Belong in the Trash

DOING THIS CAUSES THIS AND THIS!!! Wipes that claim to be “flushable” and “sewer safe” in fact are not sewer friendly. These wipes do not break down as they travel through pipes and the public sewer system. Instead, they create backups in your home plumbing and can cause sewer overflows in the street. To protect your plumbing and the sanitary sewer system, make sure the following items are disposed of in the trash, not the toilet: •Bathroom Wipes •Baby Wipes •Disinfecting Wipes •Towelettes

Boston Water and Sewer Commission | 980 Harrison Avenue, Boston, MA 02119 | www.bwsc.org |(617) 989-7000 Report SSOs A Sanitary Sewer Overflow is an unintentional discharge of untreated sewage into the environment or onto property.

If you encounter a sewer overflow, call BWSC 24 Hour Emergency Service Line 617-989-7000.

BWSC.ORG

BWSC News

Jul/Aug 2020 Open to the Public By Appointment While a large percentage of transactions can be conducted remotely at bwsc.org, BWSC offices are open to the public for business by appointment. To schedule an appointment call 617-989-7800. No walk-ins will be permitted during this time. A record of your visit, including a valid ID and phone number will also be required to comply with federal and state contact tracing regulations. Before accessing the building, visitors are required to: • Have an appointment • Wear face covering/masks at all times • Provide a valid ID and current telephone • Undergo temperature screening number for contact tracing purposes • Answer health related questions

Easy Ways to Pay Online (www.bwsc.org) QuickPay AutoPay • E-Check • Register for Online Account • Debit Card • Sign up for AutoPay • Credit Card

BWSC @ Work, Essential Services Continue Uninterrupted While we face the COVID-19 crisis together, BWSC is working hard around the clock maintaining the water and sewer infrastructure throughout the city. BWSC crews will continue following safety guidelines put forth by the CDC to ensure the health and safety of our employees and the public. Virtual Community Education Presentations are now being held virtually by our educational outreach coordinator. Students can still learn what can and can’t be flushed down the toilet or put into storm drains, where our water comes from, and so much more. Camps or summer programs interested in a presentation, contact BWSC at [email protected].

www.bwsc.org

(617) 989-7000 Protect Yourself! Always Ask for Identification Construction work has begun. Before allowing anyone into your home or property, always ask for identification. BWSC employees and consultants are required to provide you with an official photo ID card. If you are unsure about allowing someone who claims to be a BWSC employee into your home, call (617) 989-7000 for verification. Ask for the Community Services Department.

Tips on Outdoor Water Conservation • The best times to water plants are dawn and dusk. • Grass naturally becomes dormant in the summer months and brown patches of grass may appear on your lawn. However, grass will revive quickly after a steady rainfall or cooler weather. • Raise mower blade level to 2-3 inches. Longer grass retains more moisture, encourages deeper rooting, requires less fertilizer, and competes better against weeds.

Stay Hydrated This Summer! When you are headed out to enjoy the summer weather, don’t forget your mask - and don’t forget to fill your bottle with great tasting Boston tap water. It’s important to stay hydrated during the summer months. Whether you are going for a jog or enjoying , you can always take along some refreshing tap water.

Don’t Dump! Help Protect our Waterways Most catch basins in Boston connect to storm drains that discharge the runoff to the nearest brook, river or Boston Harbor. Do not dump harmful substances such as household chemicals, fertilizers, insecticides, automotive fluids, oils, paints, and commercial waste. Remember, pet waste will also contaminate, it should be disposed of properly and never put into a catch basin. Help keep our rivers and Boston Harbor clean.

www.bwsc.org

(617) 989-7000 BWSC News

Nov/Dec 2020

The traditional celebrations that occur this time of year may look different as a result of COVID-19. Please celebrate safely, and enjoy the holidays in good health. What is FOG? As many of us are baking, roasting and preparing seasonal meals there is one rule that every cook should remember: Don’t dump Fats, Oils, or Grease (FOG) down the drain! Instead, Can the Grease! Where does FOG come from? FOG is found in many food products such as:

• Cooking oil • Sauces • Butter and margarine • Meat fat • Lard • Dairy products FOG is an unavoidable part of cooking but knowing how to dispose of FOG is key. Excess Fats, Oils, and Grease should never be poured down the sink, or flushed down the toilet. FOG that’s poured into the sink or toilet will harden in the pipes and cause backups in your plumbing and Boston’s sewer system.

Disposing of FOG is easy All you need to do is Can the Grease! After cooking, let FOG cool in the pan. Once cooled, pour or scoop FOG into a can, cover the can with a BWSC Grease Lid and store it in the freezer. When the can is full, remove the lid for reuse, and put the can into the trash on your regular trash collection day.

Boston residents can request a FREE BWSC Grease Lid! Call BWSC at 617-989-7599, or request one online at www.bwsc.org.

www.bwsc.org

(617) 989-7000 BWSC Community Outreach November 28 is Small Business Saturday. BWSC lends its support to the City of Boston Main Streets by donating free packets that include a grease lid. Whenever you choose to shop, stop by any of the 20 participating Main Streets offices and pick-up a free packet courtesy of BWSC. Visit the main streets page at https://bit.ly/3kvNeHr for information on your local main streets district. Thank You for shopping locally.

Sanitary Sewer Overflow Prevention A Sanitary Sewer Overflow (SSO) is an unintentional discharge, spill or release of untreated sewage into the environment or a property. The overflow resulting from these sewer backups can cause damage to a property and pollute the environment. To Help Prevent Sanitary Sewer Overflows, Please: • Keep Wipes Out of pipes: There are many disposable wipes that claim to be “flushable” and “sewer safe.” However, these wipes do not break down as they travel through pipes and into the sewer system. Wipes can create clogs in both household plumbing and the public sewer system and result in SSOs. • Fats, oils, and grease (FOG) can cause blockages in sewer pipes and lead to SSOs. Proper Disposal of FOG can help to prevent SSO. “Can the Grease!”

Don’t Forget to Scoop the Poop! Catch Basins connect to storm drains that discharge runoff without treatment to the nearest waterway. Dumping pet waste into a catch basin pollutes the same waterways that we utilize for recreational purposes. As with other refuse, the proper place to dispose of pet waste is in the trash. Pet waste is harmful to our waterways. Convenient Ways to Pay while staying Safe • Online: Visit the My Account page to make electronic payments using your checking/money market account, debit card or credit card. BWSC accepts MasterCard, VISA, and Discover. • By Phone: Customer service representatives are available to answer questions at 617-989-7800. • To check your balance or make a payment by phone, please call 844-470-5881. • In the Mail: Mail check or money order directly to: Boston Water and Sewer Commission 980 Harrison Avenue Boston, MA 02119

www.bwsc.org

(617) 989-7000 BWSC News

Sept/Oct 2020

BWSC @ Work Construction has fully resumed in the city and BWSC will continue its dedicated maintenance, replacement and rehabilitation of Boston’s water and sewer infrastructure. Please remember not to let anyone into your building without proper identification during the construction season. You may contact BWSC Catch Basins ready for installation at (617) 989- 7000.

Book a Virtual Presentation Do you have remote classes or community groups who would like to meet virtually and learn about where our water comes from and its quality? Reach out to us for more information by sending an email to [email protected]. The Commission offers local schools educational presentations to help promote an understanding of the importance of water quality and what individuals can do to help maintain our local waterways. Our educational program also extends to senior centers, neighborhood groups, and other nonprofit organizations interested in environmental education. We will continue to respect social distancing guidelines by offering our educational outreach program remotely.

Boston Counts 2020 The deadline to respond to the 2020 census has changed from October 31st to September 30th. If your household has not responded, you can still do so online or by telephone at my2020census.gov or by calling 844-330-2020. Services are offered in 13 languages, and you can respond even without your original census ID number.

Save the Date! Imagine a Day Without Water is October 21st. Follow us on social media to see why Boston Water and Sewer Commission values water each day. Visit imagineadaywithoutwater.org to see how you can get behind the cause too!

www.bwsc.org

(617) 989-7000 Water Main Flushing Program Schedule Flushing hydrants is an important preventive maintenance activity that allows BWSC to continue to deliver the highest quality water and fire protection to our customers. If you experience a discoloration of water after BWSC crews flush, run your faucets for a minute or two, this will clear your water service line. Flushing will commence September 1st through October 12th in Chinatown, South End and Roxbury from 10PM to 6AM.

Check our website for a list of streets.

Paying Your Bill Online Promote social distancing by paying your bill on-line at www.bwsc.org. Our WWW.BWSC.ORG website has convenient options for bill payment such as Quickpay and Autopay. Also, if you sign up for the Customer Self-Service portal, you can view, download and pay your bill. You can also view your account history, monthly consumption, and daily consumption. Our on-line system simplifies the billing process while also helping to reduce social contact.

Reminder: In-person services are available at Headquarters by appointment only.

Keeping Catch Basins Clear Autumn is a beautiful season to be in Boston. However, leaves that fall can collect on top of the city’s catch basins. These leaves, and other debris, can block rainwater from entering into the storm drain system, potentially causing flooding in our neighborhoods. Residents can help BWSC and the Department of Public Works to keep catch basins clean and free of debris. All that’s needed is a rake, shovel, broom and receptacle.

How You Can Help •Use gloves or other protective gear. •Clear leaves and other debris from catch basins in your neighborhood or near your business. •Put leaves and other yard debris in large paper bags or open barrels labeled “YARD WASTE”. •Place barrels, bags and branches curbside by 7 AM on your neighborhood’s designated recycling day.

Leaf and Yard Waste Collection Leaf and yard waste collection continues through the first week in December. For more information, call the DPW at 617-635-7573 or visit their website at boston.gov/trash-day-schedule.

www.bwsc.org

(617) 989-7000

Obstructed Catch Basins Cause Flooding and Pollution

During storm events, rainwater flows into the catch basins in the street and into the storm drain system, which transports rainwater directly to local waterways. Debris on top of catch basins, including trash, can prevent rainwater from flowing into the storm drain system, causing streets to flood. Debris can also travel with rainwater through the storm drain system and pollute local waterways.

Boston Water and Sewer Commission • 980 Harrison Avenue, Boston MA 02119 • (617) 989-7000

Keep Catch Basins in your Neighborhood Clear

To prevent street flooding and pollution from debris on top of catch basins:

 Clear leaves from the catch basins and dispose of leaves with yard waste. For more information on proper disposal of yard waste, go to www.cityofboston.gov/publicworks/wastereduction/yardwaste.asp.

 Clear debris from the top of catch basins and place into a trash receptacle.

 Sweep up debris from sidewalks and driveways and place into a trash receptacle. Do not sweep debris into catch basins.

Boston Water and Sewer Commission • 980 Harrison Avenue, Boston MA 02119 • (617) 989-7000 Help protect our Don’t Dump! water resources.

Most catch basins in Boston connect to storm drains that discharge the runoff to the nearest brook, river or Boston Harbor. Substances carelessly spilled or dumped onto our streets or directly into a catch basin can pollute Boston Harbor and the Charles, Neponset and Mystic Rivers.

Boston Water and Sewer Commission | 980 Harrison Avenue, Boston, MA 02119 | www.bwsc.org | (617) 989-7000

Paint Bleach Report Illegal Dumping The dumping of any substance into a catch basin is illegal in Boston. Prohibited substances include household chemicals, fertilizers, insecticides, automotive fluids, oils, paints, pet waste and commercial waste. Anything dumped into a catch basin can travel through storm drains to local streams, rivers, and into Boston Harbor. These pollutants harm water quality and can kill aquatic life.

To report an illegal dumping incident, contact the Boston Water and Sewer Commission immediately at 617-989-7000

Boston Water and Sewer Commission | 980 Harrison Avenue, Boston, MA 02119 | www.bwsc.org | (617) 989-7000 other household items such as pottery, make-up, 1986, it still might be present in older homes. Lead is a health concern and is commonly found in toys, and even food. Lead paint was outlawed in The corrosion or wearing away of these Why am I receiving Sourcesthe environment ,of most Lead commonly in lead based 1978, but dust from homes that still have lead lead-based materials can add lead to tap water, paint. Lead can also be found in water, though at paintparticularly is the most if common water sits source for aof long exposure time to in the particularly if water sits for a long time in the pipes this brochure? much lower levels. Since the Massachusetts Water lead.pipes Therefore, before make use. sureTherefore, to wash wateryour children’s that has before use. Therefore, water that has been sitting During the Fall 2020 sampling period Resources began treating the water in 1996, lead hands and toys often as they can come into in household pipes for several hours, such as in levels at the tap have dropped around 90 percent. been sitting in household pipes for several Boston found elevated levels of lead in contact with dirt and dust containing lead. the morning, or after returning from work or hours, overnight, or after returning from work or school, is more likely to contain lead. If high levels drinking water in some homes. Lead can Why am I receiving this brochure? Theschool, water providedis more likelyby MWRA to contain is lead-free lead. when If highit of lead are found in drinking water, cause serious health problems, especially for leaves the reservoirs. Local distribution pipes that water may contribute 20 percent or During the Fall 2020 sampling period Boston levels of lead are found in drinking water, pregnant women and young children. Please found elevated levels of lead in drinking water carry the water to your community are made more of a person’s exposure to mostlywater of may iron and contribute steel and 20 therefore percent do ornot more lead. Infants who consume read this information closely to see what you in some homes. Lead can cause serious health problems, especially for pregnant addof leada person’s to water. exposure However, to lead lead. can Infants get into who mostly formula mixed can do to reduce lead in your drinking water. women and young children. Please read this tapconsume water through formula a lead mixed service with line water (if your containing with lead-containing information closely to see what you can do to home has one), lead solder used in plumb- water can receive up to reduce lead in your drinking water. ing,lead and can older receive brass fixtures. up to 60Even percent though theof their 60 percent of their Health Effects of Lead useexposure of lead solder from was water. banned in the U.S. in exposure from water. Lead can cause Lead is a common metalHealth found effects in the of lead serious health environment. CommonLead sources can cause of lead serious health problems if too much Steps You Can Take To Reduce Exposure To Lead In Drinking Water problems if too much exposure are lead-based paint, household dust, enters your body enters your body from soil, and some plumbingdrinking materials water or including other Fresh water is Test your from drinking water better than Identify if your plumbing or Consider using a filter: faucets purchased beforesources. January It can cause2014. Lead home for lead: fixtures contain lead: If your water contains lead, damage to the brain and stale: If your or other sources. It water has been The only way to If your home has a lead you may want to consider can also be found in kidneys,other household and can interfere items can cause damage sitting for several determine the service line (the pipe using a filter. Make sure the with the production of red to the brain and such as pottery, make-up, toys, and even food. hours, run the water until it level of lead in drinking connecting your house filter you are considering blood cells that carry oxygen Lead paint was outlawed in 1978, but dust is consistently cold before water at your home is to to the water main removes lead – not all filters kidneys, and can to all parts of your body. The drinking or cooking with it. have the water tested by a in the street), do. Be sure to replace filters interfere with the from homes that still havegreatest lead risk paint of leadis the expo most- For most residences, about state certified laboratory. consider replacing in accordance common source of exposuresure is to to infants, lead. Therefore, young production of red two minutes should be The cost to test is usually it to reduce the possibility of with manufacturer’s children, and pregnant blood cells that carry make sure to wash your children’s hands and sufficient. However, flushing between $20 and $50. elevated lead levels. Call the instructions to protect women. Scientists have oxygen to all parts toys often as they can come into contact with times depend on whether A list of labs is available on- BWSC Lead Hotline at water quality. linked the effects of lead on your home has a lead line at www.mwra.com 617-989-7888 to find out Contact NSF of your body. The dirt and dust containingthe lead.brain with lowered IQ in service line and its or call (617) 242-5323. about the Lead Incentive International at greatest risk of lead exposure is to infants, young children. Adults with kidney The water provided by MWRA is lead-free length. Residents Consider having your paint Replacement Program. 1-800-NSF-8010 or problems and high blood children, and pregnant women. Scientists have should contact BWSC tested also. Faucets purchased before www.nsf.org for more when it leaves the reservoirs.pressure Localcan be distribution affected by linked the effects of lead to discuss building- or 2014 may also contribute information on water filters. pipes that carry the waterlow levels to your of lead community more than Use cold, fresh water for on the brain with lowered home- specific flushing times. lead to drinking water. For Also, if you are considering arehealthy made adults. mostly Lead of is iron stored and in steelthe bones, and therefore and it cooking and preparing more information contact using bottled water, note that IQ in children. Adults with can be released later in life. During pregnancy, the Test your child for lead: baby formula: Do not cook Contact your local health www.mwra.com. it may cost up to 1,000 times kidney problems and high dochild not receives add lead lead to from water. the mother’sHowever, bones, lead which can with, drink, or make baby get into tap water through a lead service line department or your health more than tap water. Simply blood pressure can be may affect brain development. care provider to find out how formula with water from the Do not boil water to flushing your tap, as described you can get your child hot water tap. Lead affected by low levels of (if your home has one), lead solder used in remove lead: Boiling above, is usually a cheaper, tested. A blood lead level dissolves more lead more than healthy plumbing,Sources andof Leadolder brass fixtures. Even though water will not reduce lead. equally effective alternative. test is the only way to know if easily into adults. Lead is stored in theLead use is ofa common lead solder metal was found banned in the environ-in the U.S. your child is being exposed ment. Common sources of lead exposure are to lead. For more informa- hot water. the bones, and it can be released later in life. inlead-based 1986, it still paint, might household be present dust, in soil, older and homes.some tion, contact the state During pregnancy, the child receives lead Theplumbing corrosion materials or wearing including away faucets of thesepurchased lead- Department of Public Health at 1-800-532-9571 or from the mother’s bones, which may affect basedbefore materials January 2014. can Leadadd leadcan also to tapbe found water, in search MDPH for lead. brain development. Because lead levels in home plumbing What is being done to control can vary, individual homes and lead in the drinking water? communities may occasionally have Important MWRA and the Boston Water and Sewer higher test results. In the Fall of 2020 Boston results were 25.2 ppb, above Commission are concerned about lead in your the Action Level. Information drinking water. We have an extensive testing Up until January program and treat the water to make it less 2014, Federal law About corrosive. Starting in 1996, MWRA increased allowed brass the pH and buffering capacity of the water, fixtures such as and has steadily fine-tuned these levels to faucets to contain further reduce the leaching of lead into drinking up to 8% lead. water. Due to this treatment change, lead Faucets sold after Lead levels found in sample tests of tap water have then are essentially in Your Drinking Water dropped around 90 percent since 1992. lead free and will not contribute lead to Although most homes have very low levels of drinking water. Replacing an older faucet is lead in their drinking water, some homes may one way to reduce the potential for elevated still have lead levels above the EPA Action lead levels in your drinking water. You can also Level of 15 parts per billion (ppb). run the water to flush out any water in contact with the older brass faucet. Additional information BWSC encourages Boston’s property owners to replace private lead water services through its Lead Incentive Replacement Program. This program provides financial assistance of up to $2000.00 towards the cost of the replacement. Residents can also look up information about a lead service line at a particular property by using the interactive Lead Service Map on the To monitor lead levels, the Boston Water website at https://www.bwsc.org/environment- and Sewer Commission tests tap water in education/maproom/lead-service-map. For homes that are most likely to have lead. These questions about the lead replacement incentive homes are usually older homes that may have program contact the BWSC Lead Hotline lead service lines or lead solder, and are at 617-989-7888. For more information on Boston Water and Sewer Commission intentionally tested after water has been sitting reducing lead exposure around your home and PWS ID# 3035000 overnight. The EPA rule requires that 90% the health effects of lead, visit EPA’s website at 617-989-7000 | www.bwsc.org of these worst case samples must have lead www.epa.gov/lead, search for MassDEP lead Massachusetts Water Resources Authority levels below the Action Level of 15 ppb. or MDPH lead, call 1-800-532-9751, PWS ID# 6000000 or contact your health care provider. 617-242-5323 | www.mwra.com Boston Water and Sewer Commission

Important Information about Lead in Drinking Water

ENGLISH & SPANISH Why am I receiving this brochure? You are receiving this notice so Boston Water and Sewer Commission (BWSC) can provide you with information about what steps you can take in your home to reduce Boston Water and Sewer Commission the risk of exposure to lead. Lead is a health concern and is commonly found in the environment; most commonly in lead based paint. Lead can also be found in water, though at much lower levels. Lead can cause serious health problems, especially for pregnant women and young children. Please read this information closely to see what you can do to reduce lead in your drinking water.

Health Effects of Lead Important Lead can cause serious health problems if too much enters your body from drinking water or other sources. It can cause damage to the brain and kidneys, and can interfere with Information the production of red blood cells that carry oxygen to all parts of your body. The greatest risk of lead exposure is to infants, young children, and pregnant women. Scientists about have linked the effects of lead on the brain with lowered IQ in children. Adults with kidney problems and high blood pressure can be affected by low levels of lead more than Lead healthy adults. Lead is stored in the bones, and it can be released later in life. During pregnancy, the child may receive lead from the mother’s bones, which may affect in brain development.

Sources of Lead Drinking Lead is a common metal found in the environment. Common sources of lead exposure are lead-based Water paint, household dust, soil, and some plumbing materials including many faucets. Lead can also be found in other household items such as pottery, make-up, toys, and even food. Lead paint was outlawed in 1978, but dust from homes that still have lead paint is the most common source of exposure to lead. Therefore, make sure to wash your children’s hands and toys often as they can come into contact with dirt and dust containing lead. The water provided by BWSC and Massachusetts Water ENGLISH & SPANISH Resource Authority (MWRA) is lead-free when it leaves the reservoirs. However, lead can get into tap water through ENGLISH & SPANISH home service piping, lead solder used in plumbing, and some brass fixtures. Even though the use of lead solder was banned in the U.S. in 1986, it still might be present in older homes. The corrosion or wearing away of these lead-based materials can add lead to tap water, particularly if water sits for a long time in the pipes before use. Therefore, water that has been sitting in household pipes for several hours, such as in the morning, or after returning from work or school, is more likely to contain lead. If high levels of lead are found in drinking water, water may contribute up to 20 percent of a person’s exposure to lead. Infants who con- sume mostly formula mixed with lead-containing water can receive up to 60 percent of their exposure from water.

Steps You Can Take to Reduce Exposure to Lead in Drinking Water FLUSH YOUR SYSTEM — Fresh water is better than stale: If your water has been sitting for several hours, run the water until it is consistently cold—usually about 15-30 seconds—before drinking or cooking with it. This flushes water which may contain lead from the pipes.

Use cold, fresh water for cooking and preparing baby formula: Do not cook with or drink water from the hot water tap. Lead dissolves more easily into hot water. Do not use water from the hot tap to make baby formula.

Do not boil water to remove lead. Boiling water will not reduce lead. Test your home for lead: The only way to determine the level of lead in drinking water at your home is to have the water tested by a state certified laboratory. The cost to test is usually between $10 and $50. Consider having your paint tested also. A list of labs is available online at www.bwsc.org or you can call the BWSC Lead Hotline at (617) 989-7888.

Test your child for lead: Contact your child’s pediatrician or your local health department to find out how you can get your child tested. A blood lead level test is the only way to know if your child is being exposed to lead. For more infor- mation, contact DPH at www.mass.gov/dph/clppp or at (800) 532-9571.

Determine if your plumbing fixtures contain lead: New brass faucets or other plumbing fixtures, including those labeled “lead-free”, may contribute lead to drinking water. If you are concerned about lead in tap water, you should consider buying a low-lead or no-lead fixture. Contact NSF (see next section) to learn more about lead-free faucets. Consider using a filter: If your water contains lead, you may want to consider using a filter. Make sure the filter you are considering removes lead—not all filters do. Be sure to replace filters in accordance with manufacturer’s instructions to protect water quality. Contact the National Sanitation Foundation at 1-800-NSF-8010 or www.nsf.org for more information on water filters. Also, if you are considering using bottled water, note that it may cost up to 1,000 times more than tap water. Simply flushing your tap, as described above, is usually a cheaper, equally effective alternative.

What is being done to control lead in the drinking water? BWSC and MWRA are concerned about lead in your drinking water. BWSC and MWRA both have extensive testing programs and MWRA has treated the water to make it less corrosive. BWSC and MWRA are concerned about lead in your drinking water because although most homes have very low levels of lead in their drinking water, some homes in the City of Boston may have lead levels above the EPA action level of 15 parts per billion (ppb).

To monitor lead levels, BWSC and MWRA test tap water in homes that are most likely to have lead. These homes are usually older homes that may have lead service lines or lead solder, and they must be tested after water has been sitting overnight. The EPA rule requires that 90% of these worst case samples must have lead levels below the Action Level of 15 ppb.

MWRA treats your water to make it less corrosive, thereby reducing the leaching of lead into drinking water. Starting in 1996, MWRA increased the pH and buffering capacity of the water, and has steadily fine-tuned these levels since corrosion control treatment began. Due to this treatment change, lead levels found in sample tests of tap water in MWRA service area have dropped over 90% since 1996. MWRA service area has been below the Lead Action Level since June 2004. BWSC tap water has sampled below the Lead Action Level since 2007. Consider using a filter: If your water contains lead, you may want to consider using a filter. Make sure the filter you are For More Information Call the BWSC Lead Hotline at 617-989-7888 or visit our considering removes lead—not all filters do. Be sure to website at www.bwsc.org. To find out if your property has replace filters in accordance with manufacturer’s instructions a private lead service line, please see the website at to protect water quality. Contact the National Sanitation www.bwsc.org. BWSC also has a private lead service Foundation at 1-800-NSF-8010 or www.nsf.org for more line replacement program for eligible homeowners. For information on water filters. Also, if you are considering more information on reducing lead exposure around your using bottled water, note that it may cost up to 1,000 times home/building and the health effects of lead you can more than tap water. Simply flushing your tap, as described consult a variety of sources for additional information: above, is usually a cheaper, equally effective alternative.  Your family doctor or pediatrician can perform a blood What is being done to control lead in the test for lead and provide you with information about the drinking water? health effects of lead.  BWSC and MWRA M WRA (617-242-5323 or www.mwra.com) can provide are concerned about you with information about your community’s water lead in your drinking water. supply, and a list of local laboratories that have been BWSC and MWRA both certified by DEP for testing water quality. have extensive testing  programs and MWRA has The Massachusetts Department of Public Health treated the water to make (1-800-532-9571 or www.mass.gov/dph/) or the it less corrosive. BWSC Boston Public Health Commission (617-534-5966 or and MWRA are concerned www.bphc.org) can provide you with information about the health effects of lead and how you can have your about lead in your drinking child’s blood tested. water because although  most homes have very T he Environmental Protection Agency (800-424-LEAD or low levels of lead in their www.epa.gov/lead) or Massachusetts Department of drinking water, some Environmental Protection (617-292-5770 or homes in the City of Boston may have lead levels above www.mass.gov/eea/agencies/massdep/water/drinking/ lead-and-other-contaminants-in-drinking-water.html) can the EPA action level of 15 parts per billion (ppb). provide additional information about lead in drinking water. To monitor lead levels, BWSC and MWRA test tap water in homes that are most likely to have lead. These homes Did you know? are usually older homes that may have lead service lines Presently, the law allows many faucets to contain lead, or lead solder, and they must be tested after water has even though they are labeled as “lead free”. New faucets been sitting overnight. The EPA rule requires that 90% meeting the NSF 61 “lead-free” standard will have NSF 61/9 stamped on the new faucet’s cardboard box, but of these worst case samples must have lead levels below these faucets may still contain lead. Some faucet the Action Level of 15 ppb. manufactures produce plastic or new low-lead brass MWRA treats your water to make it less corrosive, thereby faucets that have virtually zero lead, but you will have to reducing the leaching of lead into drinking water. Starting check with the manufacturer. in 1996, MWRA increased the pH and buffering capacity of the water, and has steadily fine-tuned these levels since corrosion control treatment began. Due to this treatment change, lead levels found in sample tests of tap water in Boston Water and Sewer Commission MWRA service area have dropped over 90% since 1996. 980 Harrison Avenue • Boston, MA 02119-2540 PWS ID# 3035000 MWRA service area has been below the Lead Action Level since June 2004. BWSC tap water has sampled below the (617) 989-7000 Lead Action Level since 2007. www.bwsc.org Boston Water and Sewer Commission

Importante información sobre el plomo en el aqua potable

Español y Inglés ¿Por qué recibo este folleto? Recibe esta notificación para que la BWSC pueda proporcionarle la información sobre qué pasos puede tomar en su casa para reducir el riesgo del contacto con el plomo. El plomo es una preocupación Boston Water and Sewer Commission para la salud y generalmente se encuentra en el medio ambiente; por sobre todo en la pintura con plomo. El plomo también se encuentra en el agua, a pesar de que a niveles muchos más bajos.

El plomo puede causar serios problemas de salud, especialmente en mujeres embarazadas y niños pequeños. Por favor, lea esta información detenidamente para ver lo que puede hacer para reducir el plomo en el agua potable. Efectos del plomo a la salud El plomo puede causar serios problemas a la salud si demasiada cantidad ingresa al cuerpo del agua potable o de otras fuentes. Importante Puede causar daños al cerebro y los riñones y puede interferir con la producción de glóbulos rojos que transportan oxígeno a todas las partes del cuerpo. El mayor riesgo de contacto con el plomo información es para los bebés, niños pequeños y mujeres embarazadas. Los científicos han relacionado los efectos del plomo en el cerebro con una reducción en el cociente intelectual en los niños. Los adultos sobre el con problemas renales e hipertensión pueden verse afectados por bajos niveles de plomo más que los adultos saludables. El plomo se almacena en los huesos y se libera más adelante en plomo la vida. Durante el embarazo, el niño podría recibir plomo de los huesos de la madre, que puede afectar al desarrollo del cerebro. en el Fuentes de plomo El plomo es un metal común que se encuentra en el medio ambiente. Las aqua fuentes comunes de contacto con el plomo son las pinturas con base de plomo, polvo de la casa, suelo y algunos materiales de plomería que incluyen potable a muchos grifos. El plomo también se encuentra en otros artículos domésticos como la cerámica, maquillaje, juguetes e inclusive la comida. La pintura con plomo fue eliminada por ley en 1978, pero el polvo de las casas que todavía tienen pintura con plomo es la fuente más común de contacto con el plomo. Por lo tanto, asegúrese de lavar a menu- do las manos y los juguetes de sus niños ya que pueden entrar en contacto con polvo y suciedad que contienen plomo.

El agua provista por la Comisión de Aguas y Cloacas de Boston (Boston Water and Sewer Commission, BWSC) y la Autoridad de Recursos de Agua de Massachusetts (Massachusetts Water Español y Inglés Resource Authority, MWRA) no contiene plomo cuando sale Español y Inglés de las reservas. La MWRA y las cañerías de distribución de la BWSC que transportan el agua a su comunidad están fabricadas con hierro y acero y por lo tanto, no agregan plomo al agua. Sin embargo, el plomo puede ingresar al agua corriente a través de las tuberías de servicio doméstico, las soldaduras con plomo que se usan en la plomería y algunos aparatos de latón. A pesar de que el uso de soldadura con plomo se prohibió en los EE.UU. en 1986, todavía podría estar presente en algunas casas.

La corrosión o desgaste de estos materiales con plomo pueden agregar plomo al agua corriente, particularmente si el agua está estancada durante mucho tiempo en las cañerías antes de su uso. Por lo tanto, el agua que estuvo estancada en las cañerías de la casa durante varias horas, como por ejemplo, a la mañana o después de regresar del trabajo o de la escuela, tiene más posibilidades de contener plomo. Si se encuentran altos niveles de plomo en el agua potable, el agua puede contribuir hasta un 20 por ciento del contacto de una persona con el plomo. Los bebés que consumen fórmula mezclada con agua que contiene plomo pueden recibir hasta un 60 por ciento de su contacto del agua. Pasos que puede tomar para reducir el contacto con el plomo en el agua potable DRENE SU SISTEMA — El agua fresca es mejor que el agua estancada: Si el agua está estancada durante varias horas, haga correr el agua hasta que esté fría de manera consistente, generalmente alrededor de 15 a 30 segundos, antes de usarla para beber o cocinar. Esto ayuda a eliminar el agua que podría contener plomo de las cañerías. Use agua fresca y fría para cocinar y preparar la fórmula del bebé: No cocine ni beba agua del grifo de agua caliente. El plomo se disuelve más fácilmente en agua caliente. No use agua del grifo de agua caliente para preparar la fórmula del bebé.

No hierva el agua para sacar el plomo. Hervir el agua no reducirá el plomo.

Haga analizar su casa para ver si hay plomo: La única manera de determinar el nivel de plomo en el agua potable en su vivienda es pedir que un laboratorio certificado por el estado realice un análisis del agua. El costo del análisis generalmente es entre $10 y $50. Considere también hacer un análisis de la pintura. Hay una lista de los laboratorios disponible en línea en www.bwsc.org o puede llamar a la Línea telefónica del plomo de la BWSC al (617) 989-7888.

Haga el análisis del plomo a su niño: Comuníquese con su departamento local de salud o su proveedor local de atención médica para determinar cómo puede hacer que su niño se haga el análisis. El análisis del nivel de plomo en la sangre es la única manera de saber si su niño ha estado en contacto con el plomo. Para más información, comuníquese con el Departamento de Salud Pública en www.mass.gov/dph/clppp o llamando al (800) 532-9571. Identifique si sus aparatos de plomería contienen plomo: Nuevos grifos de latón y otros aparatos de plomería, incluso los que están etiquetados como “sin plomo” pueden agregar plomo al agua potable. Si tiene alguna preocupación sobre el plomo en el agua potable, deberá considerar comprar un aparato sin plomo o con bajo contenido de plomo. Llame a la NSF (ver a continuación) para obtener más información sobre grifos sin plomo.

Considere el uso de un filtro: Si su agua contiene plomo, puede considerar el uso de un filtro. Asegúrese de que el filtro que considera elimina el plomo, no todos los filtros lo hacen. Asegúrese de reemplazar los filtros de acuerdo a las instrucciones del fabricante para proteger la calidad del agua. Comuníquese con la National Sanitation Foundation llamando al 1-800-NSF-8010 o www.nsf.org para más información sobre los filtros de agua. Además, si considera usar agua en botellas, tenga en cuenta que podría costar hasta 1.000 veces más que el agua potable. Simplemente, purgar el grifo, como se describe anteriormente, es una alternativa más económica e igualmente eficaz. ¿Qué se hace para controlar el plomo en el agua potable? La BWSC y la MWRA se preocupan sobre el plomo en el agua potable. La BWSC y la MWRA tienen extensos programas de análisis y la MWRA ha tratado al agua para hacerla menos corrosiva. La BWSC y la MWRA se preocupan sobre el plomo en el agua potable porque a pesar de que la mayoría de las viviendas tienen bajos niveles de plomo en el agua potable, algunas casas en la Ciudad de Boston podrían tener niveles de plomo por encima de los niveles que requieren medidas de la EPA de 15 partes por mil millones (ppb).

Para monitorizar los niveles de plomo, la BWSC y la MWRA hacen análisis del agua potable en viviendas que tienen más posibilidades de tener plomo. Estas viviendas son generalmente casas más antiguas que podrían haber tenido líneas de servicio con plomo o soldaduras con plomo y deben completar los análisis luego de que el agua esté estancada durante la noche. La norma de la EPA requiere que un 90% de estas peores muestras deben tener niveles de plomo que estén por debajo del nivel que requiere medidas de 15 ppb.

La MWRA trata el agua para que sea menos corrosiva, y reduce por lo tanto, el filtrado del plomo en agua potable. A partir de 1996, la MWRA aumentó el pH y la capacidad de amortiguación del agua y ha actualizado continuamente estos niveles desde que comenzó el tratamiento de control de la corrosión. Debido a este cambio en el tratamiento, los niveles encontrados en las muestras de agua potable en la zona de servicio de la MWRA han disminuido más de un 90% desde 1996. La zona de servicio Identifique si sus aparatos de plomería contienen plomo: Nuevos de la MWRA ha estado por debajo del nivel de plomo que requiere grifos de latón y otros aparatos de plomería, incluso los que medidas desde junio de 2004. El agua potable de la BWSC ha están etiquetados como “sin plomo” pueden agregar plomo al logrado muestras que están por debajo del nivel que requiere agua potable. Si tiene alguna preocupación sobre el plomo en el medidas desde 2007. agua potable, deberá considerar comprar un aparato sin plomo o con bajo contenido de plomo. Llame a la NSF (ver a continuación) Para Más Información Llame a la Línea telefónica del plomo de la BWSC al 617-989-7888 para obtener más información sobre grifos sin plomo. o visite nuestro sitio Web en www.bwsc.org. Para determinar si Considere el uso de un filtro: Si su agua contiene plomo, puede su propiedad tiene una línea de servicio privado con plomo, por considerar el uso de un filtro. Asegúrese de que el filtro que favor visite el sitio Web en www.bwsc.org. La BWSC también considera elimina el plomo, no todos los filtros lo hacen. Asegúrese tiene un programa de reemplazo de líneas de servicio privado de reemplazar los filtros de acuerdo a las instrucciones del fabricante con plomo para propietarios aprobados. Para más información para proteger la calidad del agua. Comuníquese con la National sobre la reducción del contacto con el plomo en su casa o Sanitation Foundation llamando al 1-800-NSF-8010 o www.nsf.org edi cio y los efectos a la salud, puede consultar a una cantidad para más información sobre los filtros de agua. Además, si considera de fuentes para obtener información adicional: usar agua en botellas, tenga en cuenta que podría costar hasta El médico de su familia o su pediatra puede realizar un 1.000 veces más que el agua potable. Simplemente, purgar el análisis de sangre para determinar el nivel de plomo y grifo, como se describe anteriormente, es una alternativa más ofrecerle información sobre los efectos del plomo a la salud. económica e igualmente eficaz. La MWRA (617-242-5323 o www.mwra.com) puede proporcionarle información sobre el agua de su comunidad y una lista de ¿Qué se hace para laboratorios locales que han recibido la certi cación del controlar el plomo en Departamento de Protección del Medio Ambiente (DEP por sus el agua potable? siglas en inglés) para hacer un análisis de la calidad del agua. La BWSC y la MWRA se preocupan El Departamento de Salud Pública de Massachusetts sobre el plomo en el agua potable. (1-800-532-9571 o www.mass.gov/dph/) o la Comisión de La BWSC y la MWRA tienen extensos Salud Pública de Boston (617-534-5966 o www.bphc.org) programas de análisis y la MWRA ha pueden ofrecerle información sobre los efectos del plomo a la tratado al agua para hacerla menos corrosiva. La BWSC y la salud y cómo puede obtener un análisis de la sangre de su hijo. MWRA se preocupan sobre el plomo en el agua potable porque La Agencia de Protección del Medio Ambiente a pesar de que la mayoría de las viviendas tienen bajos niveles de (800-424-LEAD o www.epa.gov/lead) o el Departamento plomo en el agua potable, algunas casas en la Ciudad de Boston de Protección del Medio Ambiente de Massachusetts (617-292-5770 o www.mass.gov/eea/agencies/massdep/water/ podrían tener niveles de plomo por encima de los niveles que drinking/lead-and-other-contaminants-in-drinking-water.html) requieren medidas de la EPA de 15 partes por mil millones (ppb). pueden proporcionar información adicional sobre el plomo en Para monitorizar los niveles de plomo, la BWSC y la MWRA hacen el agua potable. análisis del agua potable en viviendas que tienen más posibilidades ¿Sabía usted? de tener plomo. Estas viviendas son generalmente casas más Actualmente, la ley permite que muchos grifos contengan plomo, a antiguas que podrían haber tenido líneas de servicio con plomo pesar de que estén etiquetados como que no contienen plomo. Los o soldaduras con plomo y deben completar los análisis luego de nuevos grifos que cumplen con la norma 61 de la NSF como sin plomo que el agua esté estancada durante la noche. La norma de la EPA tendrán escrito NSF 61/9 escrito en la caja de cartón del grifo, pero requiere que un 90% de estas peores muestras deben tener todavía pueden tener plomo. Algunos fabricantes de grifos producen grifos de plástico o de latón con bajo contenido de plomo que casi no niveles de plomo que estén por debajo del nivel que requiere medidas tienen plomo, pero deberá consultar al fabricante. de 15 ppb.

La MWRA trata el agua para que sea menos corrosiva, y reduce por lo tanto, el filtrado del plomo en agua potable. A partir de 1996, la MWRA aumentó el pH y la capacidad de amortiguación del agua y ha actualizado continuamente estos niveles desde Boston Water and Sewer Commission que comenzó el tratamiento de control de la corrosión. Debido 980 Harrison Avenue • Boston, MA 02119-2540 a este cambio en el tratamiento, los niveles encontrados en las PWS ID# 3035000 muestras de agua potable en la zona de servicio de la MWRA (617) 989-7000 han disminuido más de un 90% desde 1996. La zona de servicio www.bwsc.org Post Lead Line Replacement Flushing Instructions

For standing showers, For showers attached remove the shower heads to bathtubs, use the bathtub faucet

Remember to Remove aerators include laundry tubs from all faucets and and utility sinks shower heads

To begin, turn on the cold water faucets on the lowest floor of your home and move up floors until all the cold water faucets are on and running.

Run all cold water faucets for 30 minutes, then turn off all cold water faucets on the lowest floor of your home, moving up until all the faucets are off. Post Lead Line Replacement Flushing Instructions

After replacement of your lead service line, it is important to flush your line to ensure that any lead in your service line is removed. Therefore, you should not use your water (hot or cold) before flushing your indoor water pipes. This protocol should be used to flush your water pipes post-relay thoroughly to minimize any exposure to lead in drinking water. Post-flushing, only use COLD water for consumption (cooking, drinking, making baby formula, etc.) after flushing.

Please follow these steps to flush your internal water pipes on the day the lead line is replaced:

STEP 1. Locate all water faucets in the house where you can run the water without the sink or tub overflowing. Make sure all drains are open and clear.

STEP 2. Remove aerators (screens) from faucets and shower heads.

STEP 3. Turn on faucets in the basement or lowest floor of your home first and move up to upper floors opening upstairs faucets and fixtures. Please flush water with faucets completely open.

STEP 4. After all the faucets are open, let the water run for 30 minutes.

STEP 5. After 30 MINUTES, turn the water off, starting with basement or lowest floor, moving up shutting off each faucet and/or fixture.

STEP 6. Clean the aerators and put them back on each faucet.

MAJOR FLUSH: PLEASE REPEAT THIS FOR 30 DAYS AFTER THE LEAD SERVICE LINE REPLACEMENT.

BWSC’s 24-hour Emergency Hotline 617-989-7000

Community Outreach Education Tracking by Neighborhood CHARLESTOWN 182 60 EAST BOSTON

CENTRAL BACK BAY/ 29 11 BEACON HILL ALLSTON/BRIGHTON 0 0 FENWAY/KENMORE 0 SOUTH END 0 SOUTH BOSTON HARBOR ISLANDS

NORTH DORCHESTER 0 3 0 ROXBURY 0 JAMAICA PLAIN

0 WEST ROXBURY ROSLINDALE SOUTH DORCHESTER 17 0 0 Neighborhood Counts for MATTAPAN Reporting Period HYDE PARK 07/01/2020 - 12/31/2020

87 Community Outreach Material Tracking

by Neighborhood 0 CHARLESTOWN

EAST BOSTON

CENTRAL 117

BACK BAY/ 117 BEACON HILL ALLSTON/BRIGHTON 0 117 0 FENWAY/KENMORE 0 0 SOUTH END SOUTH BOSTON

HARBOR ISLANDS

NORTH DORCHESTER 350 456 ROXBURY 0 0

JAMAICA PLAIN

WEST ROXBURY ROSLINDALE 350 SOUTH DORCHESTER 117 117 117 Neighborhood Counts for MATTAPAN Reporting Period

HYDE PARK 07/01/2020 - 12/31/2020

117