This document gives pertinent information concerning the reissuance of the VPDES Permit listed below. This permit is being processed as a Minor, Municipal permit. The discharge results from the operation of a 0.005 MGD wastewater treatment plant. This permit action consists of updating the proposed effluent limits to reflect the current Virginia WQS (effective June 5, 2017) and updating permit language as appropriate. The effluent limitations and special conditions contained in this permit will maintain the Water Quality Standards of 9VAC25-260 et seq.

1. Facility Name and Mailing Rappahannock County High School SIC Code : 4952 WWTP Address: 6 Schoolhouse Road NAICS Code: 221320 Sewage Treatment Washington, VA 22747 Facility Facility Location: 12576 Lee Highway County: Rappahannock Washington, VA 22747 Facility Contact Name: Robin Bolt, Facilities Director Telephone Number: 540-227-0023 Facility E-mail Address: [email protected]

Expiration Date of 2. Permit No.: VA0064181 September 16, 2019 previous permit: Other VPDES Permits associated with this facility: NA Other Permits associated with this facility: Air Registration No. 40327; Petroleum ID 3041833 E2/E3/E4 Status: NA

3. Owner Name: Rappahannock County School Board Owner Contact/Title: Shannon Grimsley, Superintendent Telephone Number: 540-227-0023 Owner E-mail Address: [email protected]

4. Application Complete Date: March 20, 2019 Permit Drafted By: Ann Zimmerman Date Drafted: August 27, 2019 Draft Permit Reviewed By: Douglas Frasier Date Reviewed: September 23, 2019 Draft Permit Reviewed By: Alison Thompson Date Reviewed: October 15, 2019 Public Comment Period : Start Date: October 31, 2019 End Date: December 2, 2019

5. Receiving Waters Information: See Attachment 1 for the Flow Frequency Determination Receiving Stream Name : Covington River, UT Stream Code: 3-XDG Drainage Area at Outfall: 168 acres, 0.26 sq. mi.1 River Mile: 0.05 Stream Basin: Rappahannock River Subbasin: None Section: 4 Stream Class: III Waterbody ID: VAN-E05R Special Standards: None 6th Order HUC: RA12 7Q10 Low Flow: 0.0 MGD 7Q10 High Flow: 0.0 MGD 1Q10 Low Flow: 0.0 MGD 1Q10 High Flow: 0.0 MGD 30Q10 Low Flow: 0.0 MGD 30Q10 High Flow: 0.0 MGD Harmonic Mean Flow: 0.0 MGD 30Q5 Flow: 0.0 MGD 1 The drainage area at Outfall 001 has been updated, therefore the drainage area provided in the Flow Frequency Determination (Attachment 1), no longer is consistent with the new information provided in the Planning Statement (Attachment 5). It is staff’s professional opinion, based upon the minimal drainage area at the point of discharge that the stream provides little to no mixing during critical conditions, therefore, limitations have been established based upon critical 7Q10, 1Q10 and 30Q10 flows of 0.0 MGD to ensure protection of existing uses as all times. 6. Statutory or Regulatory Basis for Special Conditions and Effluent Limitations: X State Water Control Law X EPA Guidelines X Clean Water Act X Water Quality Standards X VPDES Permit Regulation Other (PES, Occoquan Policy, Dulles) X EPA NPDES Regulation

7. Licensed Operator Requirements: IV

8. Reliability Class: Class II

9. Permit Characterization: Private Effluent Limited Possible Interstate Effect Federal X Water Quality Limited Compliance Schedule Required State Whole Effluent Toxicity Program Required Interim Limits in Permit X POTW Pretreatment Program Required Interim Limits in Other Document X TMDL X e-DMR Participant VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 2 of 10 10. Wastewater Sources and Treatment Description:

Treatment at this facility consists of a grease trap, septic tank, a dosing chamber, a distribution box, three 3-foot deep sand filter beds approximately 20 feet by 20 feet square, chlorination, dechlorination, and post-aeration. The wastewater flows into the grease trap, the septic tank, and then the dosing chamber. Light soda ash is added manually to the dosing chamber for pH control. Dosing bells automatically send flow from the dosing chamber to the distribution box and then to the sand filter beds. After the sand filters, the sewage effluent travels through a re-circulation tank, it is then chlorinated and dechlorinated using tablets, and post-aerated before discharge. Compliance sampling is conducted at the v-notch weir after post aeration.

Approximately 300 students in grade 8 through grade 12 attend the high school and 80 staff work at the high school. The typical school year is mid-August through mid-May with breaks in the winter and spring.

See Attachment 2 for a facility schematic/diagram.

TABLE 1 – Outfall Description

Outfall Outfall Discharge Sources Treatment Design Flow Latitude and Number Longitude

Domestic Wastewater 38° 41’ 05” N 001 See Item 10 above. 0.005 MGD from a Public School. 78° 11’ 25” W See Attachment 3 for topographic map.

11. Sludge Treatment and Disposal Methods:

Solids from this facility are collected in a septic tank. The septage is removed one to two times per year and is shipped to the Remington WWTP (VA0076805) for further treatment and disposal.

12. Discharges and Monitoring Stations in Vicinity of Discharge:

TABLE 2 – Discharges within 6th Order HUC RA12

Permit Number Facility Permit Type Receiving Stream

VA0091651 Rush River Wastewater Treatment Plant VPDES IP Rush River

VA0022471 Rappahannock County Elementary School VPDES IP Rush River, UT

VA0064181 Rappahannock County High School VPDES IP Covington River, UT

Potable Water VAG640039 Washington Town Water Treatment Plant Rush River Treatment Plant GP

Ambient and biological monitoring station located at Route 621 approximately 2.9 miles downstream 3-COV001.95 from the Outfall.

13. Material Storage:

TABLE 3 - Material Storage Materials Description Volume Stored Spill/Stormwater Prevention Measures Sanuril 1-2 buckets Dechlor 1-2 buckets Stored in storage shed. Soda Ash 1-2 50-pound bags

VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 3 of 10 14. Site Inspection:

A facility recon inspection was performed by DEQ-NRO Water Compliance Staff on April 8, 2019 and April 12, 2018. A Technical and Laboratory Inspection was performed by DEQ-NRO Water Compliance Staff on October 22, 2015 (See Attachment 4). A site visit was conducted by DEQ-NRO Water Permit Writer on August 29, 2019 to confirm site conditions and information submitted in the application.

15. Receiving Stream Water Quality and Water Quality Standards:

a. Ambient Water Quality Data This facility discharges to an unnamed tributary to Covington River that has been neither monitored nor assessed. DEQ ambient and biological monitoring station 3-COV001.95 is located on Covington River at Route 621, approximately 2.9 miles downstream from Outfall 001. The following is the water quality summary for this segment of Covington River, as taken from the 2018 Integrated Report:

Class III, Section 4.

DEQ monitoring stations located in this segment of Covington River:  ambient and biological monitoring station 3-COV001.95 at Route 621

The aquatic life use is considered fully supporting based on biological monitoring and conventional parameter data. The recreation use is considered fully supporting. The fish consumption and wildlife uses were not assessed.

b. 303(d) Listed Stream Segments and Total Maximum Daily Loads (TMDLs) TABLE 4 - Information on Downstream 303(d) Impairments and TMDLs Year Distance Waterbody First TMDL Basis for Impaired Use Cause From WLA Name Listed as completed WLA Outfall Impaired Impairment Information in the 2018 Integrated Report 126 Rappahannock 8.66E+09 cfu/100ml River Basin Thornton River Recreation E. coli 2006 14 miles cfu/year E. coli Bacteria E. coli --- 01/23/2008 0.005 MGD Fish PCBs in Fish 2004 88 miles No ------Consumption Tissue This facility is accounted for in the Chesapeake Bay Rappahannock TMDL NPDES Permit Aquatic Life / River Dissolved Chesapeake Bay Inventory and is part of an Open Water 2008 90 miles Oxygen 12/29/2010 aggregated WLA for total Aquatic Life nitrogen, total phosphorus, and total suspended solids (Appendix Q).

The Rappahannock River, which is located approximately 88 miles downstream of this facility, is listed with a PCB impairment. In support of PCB TMDL development, this facility is a candidate for low-level PCB monitoring, based on its designation as a minor municipal discharger. Low-level PCB analysis uses EPA Method 1668, which is capable of detecting low-level concentrations for all 209 PCB congeners. DEQ staff has concluded that low-level PCB monitoring is not warranted for this facility as it is not expected to discharge or be a source of PCBs; therefore, low-level PCBs monitoring will not be requested for this facility.

Significant portions of the Chesapeake Bay and its tributaries are listed as impaired on Virginia’s 303(d) list of impaired waters for not meeting the aquatic life use support goal, and the 2018 Virginia Water Quality Assessment 305(b)/303(d) Integrated Report indicates that much of the mainstem Bay does not fully support this use support goal under Virginia’s Water Quality Assessment guidelines. Nutrient enrichment is cited as one of the primary causes of impairment. EPA issued the Bay TMDL on December 29, 2010. It was based, in part, on the Watershed Implementation Plans developed by the Bay watershed states and the District of Columbia. VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 4 of 10

The Chesapeake Bay TMDL addresses all segments of the Bay and its tidal tributaries that are on the impaired waters list. As with all TMDLs, a maximum aggregate watershed pollutant loading necessary to achieve the Chesapeake Bay’s water quality standards has been identified. This aggregate watershed loading is divided among the Bay states and their major tributary basins, as well as by major source categories [wastewater, urban storm water, onsite/septic systems, agriculture, air deposition]. Fact Sheet Section 17.e provides additional information on specific nutrient monitoring for this facility to implement the provisions of the Chesapeake Bay TMDL.

The full planning statement is found in Attachment 5. c. Receiving Stream Water Quality Criteria

Part IX of 9VAC25-260(360-550) designates classes and special standards applicable to defined Virginia river basins and sections. The receiving stream Covington River, UT is located within Section 4 of the Rappahannock River Basin, and is classified as a Class III water.

At all times, Class III waters must achieve a dissolved oxygen (D.O.) of 4.0 mg/L or greater, a daily average D.O. of 5.0 mg/L or greater, a temperature that does not exceed 32°C, and maintain a pH of 6.0-9.0 standard units (S.U.).

The Freshwater Water Quality/Wasteload Allocation Analysis (Attachment 6) details other water quality criteria applicable to the receiving stream.

Some Water Quality Criteria are dependent on the temperature and pH and Total Hardness of the stream and final effluent. The stream and final effluent values used as part of Attachment 6 are as follows:

pH and Temperature for Ammonia Criteria: The fresh water, aquatic life Water Quality Criteria for Ammonia are dependent on the instream temperature and pH. Since the effluent may have an impact on the instream values, the temperature and pH values of the effluent must also be considered when determining the ammonia criteria for the receiving stream. The 90th percentile temperature and pH values are used because they best represent the critical conditions of the receiving stream.

The 30Q10, 7Q10 and 1Q10 of the receiving stream are 0.0 MGD. In cases such as this, effluent pH and temperature data may be used to establish the ammonia water quality criteria. Staff has re-evaluated the effluent data for pH and temperature, the 90th percentile values are 7.0 S.U. and 20 °C. See Attachment 7 for the derivation of the 90th percentile values of the effluent pH and temperature data from January 2017 to May 2019. The ammonia water quality standards calculations are shown in Attachment 6.

Total Hardness for Hardness-Dependent Metals Criteria: The Water Quality Criteria for some metals are dependent on the receiving stream’s total hardness (expressed as mg/L calcium carbonate) as well as the total hardness of the final effluent.

There is no hardness data for this facility/receiving stream. Staff guidance suggests using a default hardness value of 50 mg/L CaCO3 for streams east of the Blue Ridge. The hardness-dependent metals criteria in Attachment 6 are based on this default value.

Bacteria Criteria: The Virginia Water Quality Standards at 9VAC25-260-170A state that the following criteria shall apply to protect primary recreational uses in surface waters:

E. coli bacteria per 100 ml of water shall not exceed a monthly geometric mean of the following:

Geometric Mean1 Freshwater E. coli (N/100 ml) 126 1For a minimum of four weekly samples [taken during any calendar month]. d. Receiving Stream Special Standards

The State Water Control Board's Water Quality Standards, River Basin Section Tables (9VAC25-260-360, 370 and 380) designates the river basins, sections, classes, and special standards for surface waters of the Commonwealth of Virginia. The receiving stream, Covington River, UT, is located within Section 4 of the Rappahannock River Basin. This section does not VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 5 of 10 have a designated special standard.

16. Antidegradation (9VAC25-260-30):

All state surface waters are provided one of three levels of antidegradation protection. For Tier 1 or existing use protection, existing uses of the water body and the water quality to protect these uses must be maintained. Tier 2 water bodies have water quality that is better than the water quality standards. Significant lowering of the water quality of Tier 2 waters is not allowed without an evaluation of the economic and social impacts. Tier 3 water bodies are exceptional waters and are so designated by regulatory amendment. The antidegradation policy prohibits new or expanded discharges into exceptional waters.

The Rappahannock County High School STP discharges to an unnamed tributary of the Covington River. The critical flows for the stream are zero and at times during drought conditions the stream flow is comprised of only effluent. It is staff’s professional judgement that such streams are classified as Tier 1. Permit limits proposed have been established by determining wasteload allocations which will result in attaining and/or maintaining all water quality criteria which apply to the receiving stream, including narrative criteria. These wasteload allocations will provide for the protection and maintenance of all existing uses.

17. Effluent Screening, Wasteload Allocation, and Effluent Limitation Development:

To determine water quality-based effluent limitations for a discharge, the suitability of data must first be determined. Data is suitable for analysis if one or more representative data points is equal to or above the quantification level ("QL") and the data represent the exact pollutant being evaluated.

Next, the appropriate Water Quality Standards (WQS) are determined for the pollutants in the effluent. Then, the Wasteload Allocations (WLA) are calculated. In this case since the critical flows 7Q10 and 1Q10 have been determined to be zero, the WLAs are equal to the WQS. The WLA values are then compared with available effluent data to determine the need for effluent limitations. Effluent limitations are needed if the 97th percentile of the daily effluent concentration values is greater than the acute wasteload allocation or if the 97th percentile of the four-day average effluent concentration values is greater than the chronic wasteload allocation. Effluent limitations are based on the most limiting WLA, the required sampling frequency, and statistical characteristics of the effluent data.

a. Effluent Screening: Effluent data obtained from the permit application and discharge monitoring reports (DMR) data from October 2014 through July 2019 has been reviewed and determined to be suitable for evaluation. Please see Attachment 8 for a summary of effluent data.

The following pollutants require a wasteload allocation analysis: ammonia as N and total residual chlorine.

b. Mixing Zones and Wasteload Allocations (WLAs):

Wasteload allocations (WLAs) are calculated for those parameters in the effluent with the reasonable potential to cause an exceedance of water quality criteria. The basic calculation for establishing a WLA is the steady state complete mix equation: Co [ Qe + ( f ) (Qs ) ] – [ ( Cs ) ( f ) ( Qs ) ] WLA = Qe

Where: WLA = Wasteload allocation Co = In-stream water quality criteria Qe = Design flow Qs = Critical receiving stream flow (1Q10 for acute aquatic life criteria; 7Q10 for chronic aquatic life criteria; 30Q10 for ammonia criteria; harmonic mean for carcinogen-human health criteria; and 30Q5 for non-carcinogen human health criteria) f = Decimal fraction of critical flow Cs = Mean background concentration of parameter in the receiving stream.

The water segment receiving the discharge via Outfall 001 is considered to have a 30Q10, 7Q10 and 1Q10 of 0.0 MGD. As such, there is no mixing zone and the WLA is equal to the Co.

VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 6 of 10 c. Effluent Limitations Toxic Pollutants, Outfall 001

9VAC25-31-220.D. requires limits be imposed where a discharge has a reasonable potential to cause or contribute to an in- stream excursion of water quality criteria. Those parameters with WLAs that are near effluent concentrations are evaluated for limits.

The VPDES Permit Regulation at 9VAC25-31-230.D requires that monthly and weekly average limitations be imposed for continuous discharges from POTWs and monthly average and daily maximum limitations be imposed for all other continuous non-POTW discharges.

1) Ammonia as N:

Based on the type of facility and the intermittent nature of the discharge (typically the discharge does not occur when school is not in session during the summer months, winter and spring breaks, and on weekends); only the acute ammonia criteria was used to calculate the ammonia limits.

Staff reevaluated pH and temperature data and used the new data to determine new ammonia water quality criteria, new wasteload allocations (WLAs) and new ammonia limits (Attachment 9). The calculated acute WLA is 36.1 mg/L which is significantly higher than the current limitation and the reasonable potential analysis will show no limit is necessary for this discharge. The current limitation was imposed due to past practices of the janitorial staff disposing of high ammonia strength cleaners into the drains. Permitting staff at that time imposed limitations to ensure that the receiving stream is protected. Therefore the current limitation of 22 mg/L will be carried forward with this reissuance based on staff’s professional judgement. With the exception of two reported monitoring results, the facility has not had any issues meeting their current limit during the previous permit term.

The Environmental Protection Agency (EPA) finalized new, more stringent ammonia criteria in August 2013; possibly resulting in significant reductions in ammonia criteria and subsequent effluent limitations. Staff understands that the incorporation of those criteria into the Virginia Water Quality Standards is forthcoming. This and many other facilities may be required to comply with these new criteria during their next respective permit terms. It is not known if the above assumptions will still be appropriate after the incorporation of the new criteria; therefore, ammonia will be revisited again during the next reissuance.

2) Total Residual Chlorine:

Chlorine is used for disinfection and is potentially in the discharge. Staff calculated WLAs for TRC using current critical flows. Limits were calculated using the acute criteria only, based on the type of facility and the intermittent nature of the discharge (typically the discharge does not occur when school is not in session during the summer months, winter and spring breaks, and on weekends). In accordance with current DEQ guidance, staff used a default data point of 0.2 mg/L and the calculated WLAs to derive limits. A monthly average of 0.009 mg/L and a weekly average limit of 0.011 mg/L are proposed for this discharge (see Attachment 10).

3) Metals/Organics:

It is staff’s professional judgement that given the wastewater sources, limitations are not necessary at this time. d. Effluent Limitations and Monitoring, Outfall 001 – Conventional and Non-Conventional Pollutants

No changes to dissolved oxygen (D.O.), biochemical oxygen demand-5 day (BOD5), total suspended solids (TSS), and pH limitations are proposed.

Dissolved Oxygen and BOD5 limitations are based on the stream modeling conducted for the unnamed tributary of the Covington River conducted in July 1978 (Attachment 11). This stream model concluded that a monthly BOD5 discharge of 20 mg/L and a D.O. discharge of 6.0 mg/L would protect the D.O. criteria of the receiving stream. However, agency practice states that streams with critical flows of zero cannot be modeled and staff believes that the D.O. model used to derive the BOD5 limits is no longer valid. The facility has been operating with the current BOD5 and D.O. limits for years with no apparent detrimental effect to the receiving stream. Furthermore, 39 of the 49 reported BOD5 monitoring results (approximately 80%) from October 2014 through July 2019 were below 10 mg/L. As such, staff believes that the current BOD5 and D.O. limits protect the D.O. criterion and no further evaluation of these limits is necessary at this time.

It is staff’s practice to equate the Total Suspended Solids limits with the BOD5. TSS limits are established to equal BOD5 limits VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 7 of 10 since the two pollutants are closely related in terms of treatment of domestic sewage.

pH limitations are set at the water quality criteria.

E. coli limitations are in accordance with the Water Quality Standards 9VAC25-260-170 and the Rappahannock River Basin Bacteria TMDL.

e. Effluent Annual Average Limitations and Monitoring, Outfall 001 – Nutrients

VPDES Regulation 9VAC25-31-220(D) requires effluent limitations that are protective of both the numerical and narrative water quality standards for state waters, including the Chesapeake Bay.

As discussed in Section 15, significant portions of the Chesapeake Bay and its tributaries are listed as impaired with nutrient enrichment cited as one of the primary causes. Virginia has committed to protecting and restoring the Bay and its tributaries.

Nonsignificant dischargers are subject to aggregate wasteload allocations for Total Nitrogen (TN), Total Phosphorus (TP), and Total Suspended Solids under the Total Maximum Daily Load (TMDL) for the Chesapeake Bay. Monitoring for Nitrates + Nitrites, Total Kjeldahl Nitrogen, Total Nitrogen, and Total Phosphorus are included in this permit. The permit already includes Total Suspended Solids limitations. The additional monitoring is needed to protect the Water Quality Standards of the Chesapeake Bay. Monitoring frequencies are set at the frequencies set forth in Guidance Memorandum No. 14-2011, Nutrient Monitoring for "Nonsignificant" Discharges to the Chesapeake Bay Watershed.

f. Effluent Limitations and Monitoring Summary:

The effluent limitations are presented in the following table. Limits were established for BOD5, Total Suspended Solids, Ammonia as N, pH, Dissolved Oxygen, Total Residual Chlorine and E. coli. Monitoring was established for flow, Nitrates + Nitrites, Total Kjeldahl Nitrogen, Total Nitrogen, and Total Phosphorus.

- The original limits for effluent BOD5 and Dissolved Oxygen were based on the July 1978 stream model and it is staff’s professional judgement that they be carried forward as the limitations are still protective. - The limit for Total Suspended Solids is based on staff’s professional judgement and agency practice. - The limits for pH, ammonia, total residual chlorine, and E. coli are based on the Virginia Water Quality Standards. - Monitoring established for Nitrates + Nitrites, Total Kjeldahl Nitrogen, Total Nitrogen, and Total Phosphorus is based on Guidance Memo 14-2001 (Chesapeake Bay Non-significant Discharger).

The mass loading (kg/d) for monthly and weekly averages were calculated by multiplying the concentration values (mg/L), with the flow values (in MGD) and a conversion factor of 3.785.

Sample Type and Frequency are in accordance with the recommendations in the VPDES Permit Manual.

The VPDES Permit Regulation at 9VAC25-31-30 and 40 CFR Part 133 require that the facility achieve at least 85% removal for BOD5 and TSS (or 65% for equivalent to secondary). The limits in this permit are water-quality-based effluent limits and result in greater than 85% removal based on an average influent BOD5 of 1172 mg/L obtained from annual influent monitoring for BOD5 conducted from November 2015 through November 2018. As stated previously, TSS limits are equated to BOD5 limits since the two pollutants are closely related in terms of treatment of domestic sewage. Therefore, the assumption can be made that greater than 85% removal of TSS is occurring as well.

18. Antibacksliding: All limits in this permit are at least as stringent as those previously established. Backsliding does not apply to this reissuance.

VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 8 of 10 19. Effluent Limitations/Monitoring Requirements: Design flow is 0.005 MGD. Effective Dates: During the period beginning with the permit's effective date and lasting until the expiration date. MONITORING BASIS FOR DISCHARGE LIMITATIONS PARAMETER REQUIREMENTS LIMITS Monthly Average Weekly Average Minimum Maximum Frequency Sample Type Flow (MGD) NA NL NA NA NL 1/D Estimate pH 1,3 NA NA 6.0 S.U. 9.0 S.U. 1/D Grab

BOD5 2,3 20 mg/L 0.38 kg/day 30 mg/L 0.57 kg/day NA NA 1/M Grab Total Suspended Solids (TSS) 1,2 20 mg/L 0.38 kg/day 30 mg/L 0.57 kg/day NA NA 1/M Grab Dissolved Oxygen (D.O.) 2,3 NA NA 6.0 mg/L NA 1/D Grab Ammonia, as N 3 22 mg/L 22 mg/L NA NA 1/M Grab E. coli (Geometric Mean) 3,5 126 n/100 mL NA NA NA 1/3M a, b Grab Total Residual Chlorine 3, 4 NA NA 1.0 mg/L NA 1/D Grab (after contact tank) Total Residual Chlorine 3 0.009 mg/L 0.011 mg/L NA NA 1/D Grab (after dechlorination) Total Kjeldahl Nitrogen (TKN) 6,7 NL mg/L NA NA NA 1/YR Grab Nitrate+Nitrite, as N 6,7 NL mg/L NA NA NA 1/YR Grab Total Nitrogen c 6,7 NL mg/L NA NA NA 1/YR Calculated Total Phosphorus 6,7 NL mg/L NA NA NA 1/YR Grab

The basis for the limitations codes are: MGD = Million gallons per day. 1/D = Once every day. 1. Federal Effluent Requirements NA = Not applicable. 1/M = Once every month. 2. Professional Judgement NL = No limit; monitor and report. 1/3M = Once every three months. 3. Water Quality Standards S.U. = Standard units. 1/YR = Once every calendar year. 4. DEQ Disinfection Guidance Rappahannock River Basin Bacteria 5. TMDL 6. Chesapeake Bay TMDL/WIP Guidance Memo 14-2001 (Chesapeake 7. Bay Non-significant Discharger)

Estimate = Reported flow is to be based on the technical evaluation of the sources contributing to the discharge. Grab = An individual sample collected over a period of time not to exceed 15 minutes. a. Samples shall be collected between 10:00 a.m. and 4:00 p.m. b. The permittee shall collect four (4) weekly samples during one month within each quarterly monitoring period as defined below. The results shall be reported as the geometric mean. The quarterly monitoring periods shall be January through March, April through June, July through September and October through December. The DMR shall be submitted no later than the 10th day of the month following the monitoring period. Should any of the quarterly monitoring results for E. coli exceed 126 n/100 mL, reported as the geometric mean, the monitoring frequency shall revert to once per week for the remainder of the permit term. c. Total Nitrogen = Sum of TKN plus Nitrate+Nitrite.

VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 9 of 10 20. Other Permit Requirements:

a. Part I.B. of the permit contains additional chlorine monitoring requirements, quantification levels and compliance reporting instructions.

These additional chlorine requirements are necessary per the Sewage Collection and Treatment Regulations at 9VAC25-790 and by the Water Quality Standards at 9VAC25-260-170. A minimum chlorine residual must be maintained at the exit of the chlorine contact tank to assure adequate disinfection. No more that 10% of the monthly test results for TRC at the exit of the chlorine contact tank shall be <1.0 mg/L with any TRC <0.6 mg/L considered a system failure. E. coli limits are defined in this section as well as monitoring requirements to take effect should an alternate means of disinfection be used.

9VAC25-31-190.L.4.c. requires an arithmetic mean for measurement averaging and 9VAC25-31-220.D requires limits be imposed where a discharge has a reasonable potential to cause or contribute to an in-stream excursion of water quality criteria. Specific analytical methodologies for toxics are listed in this permit section as well as quantification levels (QLs) necessary to demonstrate compliance with applicable permit limitations or for use in future evaluations to determine if the pollutant has reasonable potential to cause or contribute to a violation. Required averaging methodologies are also specified.

21. Other Special Conditions:

a. 95% Capacity Reopener. The VPDES Permit Regulation at 9VAC25-31-200.B.4 requires all POTWs and PVOTWs develop and submit a plan of action to DEQ when the monthly average influent flow to their sewage treatment plant reaches 95% or more of the design capacity authorized in the permit for each month of any three consecutive month period. This facility is a POTW.

b. Indirect Dischargers. Required by VPDES Permit Regulation, 9VAC25-31-200 B.1 and B.2 for POTWs and PVOTWs that receive waste from someone other than the owner of the treatment works.

c. O&M Manual Requirement. Required by Code of Virginia §62.1-44.19; Sewage Collection and Treatment Regulations, 9VAC25-790; VPDES Permit Regulation, 9VAC25-31-190.E. The permittee shall maintain a current Operations and Maintenance (O&M) Manual. The permittee shall operate the treatment works in accordance with the O&M Manual and shall make the O&M Manual available to Department personnel for review upon request. Any changes in the practices and procedures followed by the permittee shall be documented in the O&M Manual within 90 days of the effective date of the changes. Non-compliance with the O&M Manual shall be deemed a violation of the permit.

d. CTC, CTO Requirement. The Code of Virginia § 62.1-44.19; Sewage Collection and Treatment Regulations, 9VAC25-790 requires that all treatment works treating wastewater obtain a Certificate to Construct prior to commencing construction and to obtain a Certificate to Operate prior to commencing operation of the treatment works.

e. Licensed Operator Requirement. The Code of Virginia at §54.1-2300 et seq. and the VPDES Permit Regulation at 9VAC25-31-200 C, and by the Board for Waterworks and Wastewater Works Operators (18VAC160-30 et seq.) and Onsite Sewage System Professionals Regulations (18VAC160-40 et seq.) requires licensure of operators. This facility requires a Class IV operator.

f. Reliability Class. The Sewage Collection and Treatment Regulations at 9VAC25-790 require sewage treatment works to achieve a certain level of reliability in order to protect water quality and public health consequences in the event of component or system failure. Reliability means a measure of the ability of the treatment works to perform its designated function without failure or interruption of service. The facility is required to meet a reliability Class II.

g. Sludge Reopener. The VPDES Permit Regulation at 9VAC25-31-220.C requires all permits issued to treatment works treating domestic sewage (including sludge-only facilities) include a reopener clause allowing incorporation of any applicable standard for sewage sludge use or disposal promulgated under Section 405(d) of the CWA. The facility includes a sewage treatment works.

h. Sludge Use and Disposal. The VPDES Permit Regulation at 9VAC25-31-100.P; 220.B.2, and 420 through 720, and 40 CFR Part 503 require all treatment works treating domestic sewage to submit information on their sludge use and disposal practices and to meet specified standards for sludge use and disposal. The facility includes a treatment works treating domestic sewage.

i. TMDL Reopener. This special condition is to allow the permit to be reopened if necessary to bring it into compliance with any applicable TMDL that may be developed and approved for the receiving stream. VPDES PERMIT PROGRAM FACT SHEET VA0064181 PAGE 10 of 10

22. Permit Section Part II.

Required by VPDES Regulation 9VAC25-31-190, Part II of the permit contains standard conditions that appear in all VPDES Permits. In general, these standard conditions address the responsibilities of the permittee, reporting requirements, testing procedures and records retention.

23. Changes to the Permit from the Previously Issued Permit:

a. Special Conditions: - The requirement for the facility to have a Class IV licensed operator was added to the permit.

b. Monitoring and Effluent Limitations: - Semi-annual influent monitoring for oil and grease, ammonia, as N and BOD5 has been removed. - Monitoring for Total Kjeldahl Nitrogen, Nitrate+Nitrite, as N, Total Nitrogen, and Total Phosphorus was added. - The permittee requested reduced monitoring for E. coli during the previous permit term, from weekly to quarterly. This request was approved in April 2015 (Attachment 12). A review of DMR data from to October 2014 to July 2019 indicates that the permittee has had no exceedances of their E. coli limit. The requested reduced monitoring has been continued with this reissuance.

24. Variances/Alternate Limits or Conditions: None.

25. Public Notice Information:

First Public Notice Date: October 31, 2019 Second Public Notice Date: November 7, 2019

Public Notice Information is required by 9VAC25-31-280 B. All pertinent information is on file and may be inspected, and copied by contacting the: DEQ Northern Regional Office, 13901 Crown Court, Woodbridge, VA 22193, Telephone No. (703) 583-3805, [email protected]. See Attachment 13 for a copy of the public notice document.

Persons may comment in writing or by email to the DEQ on the proposed permit action, and may request a public hearing, during the comment period. Comments shall include the name, address, and telephone number of the writer and of all persons represented by the commenter/requester, and shall contain a complete, concise statement of the factual basis for comments. Only those comments received within this period will be considered. The DEQ may decide to hold a public hearing, including another comment period, if public response is significant and there are substantial, disputed issues relevant to the permit. Requests for public hearings shall state 1) the reason why a hearing is requested; 2) a brief, informal statement regarding the nature and extent of the interest of the requester or of those represented by the requester, including how and to what extent such interest would be directly and adversely affected by the permit; and 3) specific references, where possible, to terms and conditions of the permit with suggested revisions. Following the comment period, the Board will make a determination regarding the proposed permit action. This determination will become effective, unless the DEQ grants a public hearing. Due notice of any public hearing will be given. The public may request an electronic copy of the draft permit and fact sheet or review the draft permit and application at the DEQ Northern Regional Office by appointment.

26. Additional Comments:

Previous Board Action(s): This facility was referred to enforcement on May 12, 2004 due to exceedances of the BOD5 permit limit. It was de-referred on November 16, 2004 because compliance was achieved through informal action.

This facility was referred to enforcement again on March 9, 2005 due to exceedances of the BOD5, TSS, ammonia and E. coli permit limits. A Consent Order was executed on March 17, 2006. The Order was terminated on June 9, 2008 after the facility completed all of the Appendix A items.

Staff Comments: None.

Public Comment: No comments were received during the public notice. Rappahannock County High School STP (VA0064181) Fact Sheet Attachments:

Attachment 1 – Flow Frequency Determination

Attachment 2 – Facility Schematic

Attachment 3 – Topographic Map

Attachment 4 – Inspection Reports

Attachment 5 – Planning Statement

Attachment 6 – Water Quality Criteria/Wasteload Allocation Analysis

Attachment 7 – Effluent pH Data

Attachment 8 – DMR Data

Attachment 9 – Reasonable Potential Analyses – Ammonia

Attachment 10 – Reasonable Potential Analyses – Total Residual Chlorine

Attachment 11 – Stream Model

Attachment 12 – E. coli Reduction Request

Attachment 13 – Public Notice Attachment 1 MEMORANDUM DEPARTMENT OF ENVffiONMENTAL QUALITY Water Quality Assessments and Planning 629 East Main Street P.O. Box 10009 Richmond, Virginia 23219

SUBJECT: Flow Frequency Determination Rappahannock County High School - #V A0064181 ~~~gllW~~ Doug Stockman, NRO DEe 10 1998 Paul E. Hennan, P.E., WQAP ;/1£./

December 8, 1998

This memo supersedes my January 10, 1994 memo to Jan Pickrel concerning the subject VPDES permit.

The Rappahannock County High School discharges to an unnamed tributary of the Covington River. Flow frequencies are required at this site for use by the permit writer in developing effluent limitations for the VPDES permit.

The values at the discharge point were determined by inspection of the USGS Washington Quadrangle topographic map which shows the receiving stream as intermittent at the discharge point. The flow frequencies for intermittent streams are 0.0 cfs for the 1Q 10, 7Q 10, 30Q5, high flow lQ10, high flow 7QI0, and harmonic mean. The drainage area above the discharge point is 2 0.12 mi • For modeling purposes, flow frequencies have been determined for the first perennial reach downstream of the discharge point.

The VDEQ operated a continuous record stream gage on the Rush River at Washington, VA (#01662500) from 1953 to 1977. The gage was located at the Route 211/522 bridge near at Washington, VA. The flow frequencies for the gage and the perennial point are presented below. The values at the perennial point were determined by drainage area proportions and do not address any withdrawals, discharges, or springs which may lie upstream of the perennial point.

Drainage Area = 14.7 mF lQIO = 0.0 cfs High Flow lQlO = 1.4 cfs 7Q1O = 0.0 cfs High Flow 7QIO = 1.8 cfs 30Q5 = 0.335 cfs HM = 0.0 cfs Drainage Area = 0.57 mF lQ10 = 0.0 cfs High Flow lQlO = 0.054 cfs 7Q10 = 0.0 cfs High Flow 7Q10 = 0.070 cfs 30Q5 = 0.013 cfs HM = 0.0 cfs Attachment 2 Flow Diagram for Rappahannock County High School

Splitter ~ -----.D ----c:

[--J ~

EfIlucnt 1

Outfall 00 I to Covington River, UT Attachment 3 USGS Map Name: Washington, VA

Attachment 4

COMMONWEALTH of VIRGINIA

DEPARTMENT OF ENVIRONMENTAL QUALITY NORTHERN REGIONAL OFFICE

Matthew J. Strickler 13901 Crown Court, Woodbridge, Virginia 22193 David K. Paylor Director Secretary of Natural Resources (703) 583-3800 www.deq.virginia.gov Thomas A. Faha Regional Director

April 19, 2019

Shannon Grimsley Superintendent Rappahannock County Public Schools 6 Schoolhouse Road Washington, VA 22747

Re: Rappahannock High School - Sewage Treatment Plant – Permit # VA0064181

Dear Ms. Grimsley,

Enclosed are observations made on April 8, 2019 while performing a Facility Recon Inspection at the Rappahannock High School - Sewage Treatment Plant (STP). This letter is not intended as a case decision under the Virginia Administrative Process Act, Va. Code § 2.2-4000 et seq. (APA).

Please review the requirements and recommendations addressed in the “Request for Corrective Action”, section and submit in writing, a progress report to this office by May 17, 2019. Your response may be sent either via the US Postal Service or electronically, via E-mail. If you choose to send your response electronically, we recommend sending it as an Acrobat PDF or in a Word-compatible, write-protected format. Additional inspections may be conducted to confirm the facility is in compliance with permit requirements

If you have any questions or comments concerning this report, please feel free to contact me at the Northern Regional Office at (703) 583-3811 or by E-mail at [email protected].

Sincerely,

Mark Evans Environmental Specialist II cc: Permit/DMR File Electronic Copy: Compliance Manager, Compliance Auditor Ms. Pamela Parker [email protected] Michael Clark [email protected]

Permit # VA0064181 RECON INSPECTION REPORT

Virginia Department of Environmental Quality

FACILITY NAME: INSPECTION DATE: April 8, 2019 Rappahannock High School STP INSPECTOR: Mark Evans

PERMIT No.: VA0064181 REPORT DATE: April 19, 2019 TYPE OF TIME OF INSPECTION: FACILITY: Municipal Major 1:30 pm 2:00 pm

Industrial Minor TOTAL TIME SPENT Federal Small Minor 8 Hours HP LP

PHOTOGRAPHS: Yes No UNANNOUNCED INSPECTION? Yes No

REVIEWED BY / Date: 4/19/19 PRESENT DURING INSPECTION: Alex Wardle - DEQ, Robin Bolt, School Facilities Director, Pamela Parker, Plant Operator, and Troy Jenkins, Plant Maintenance Supervisor both with Rappahannock Water & Sewer Authority

INSPECTION OVERVIEW AND CONDITION OF TREATMENT UNITS

Mr. Evans and Mr. Wardle arrived at the facility at 11:00 am and met Ms. Bolt and Ms. Parker, explaining that the purpose of the inspection was to briefly review the facility’s level of compliance with its Virginia Pollution Discharge Elimination System (VPDES) permit in light of a recent spill of diesel fuel that had entered the facility (Recorded as Incident No. 2019-N-2782 in the DEQ Pollution Response Program database). The inspection consisted of a brief tour (photos 1 to 6) of the treatment plant and the spill area, which was Boiler Room #2 of the school building. The treatment plant consists of a grease trap and septic tank that flow to a dosing chamber through a distribution box into three sand filters draining to tablet chlorination and dechlorination units then through a weir and post-aeration to Outfall 001. The treatment plant appeared to operating and there were no odors or visual signs of diesel contamination. One of the floor drains in Boiler Room #2 were plugged; however, the other floor drain in this room was not plugged and none of the floor drains in Boiler Room #1 were plugged. In addition, a large fenced in tank of diesel fuel located outside of Boiler Room #1 was not labeled and there was no information to indicate whether or not the tank had double-walled construction. Mr. Evans departed the facility at 12:00 am. After the inspection, Ms. Parker provided photos of plugged drain lines in Boiler Room #2; however, DEQ needs written confirmation that all of the drains in that room and in Boiler Room #1 have been plugged.

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 2 Permit # VA0064181 RECON INSPECTION REPORT

EFFLUENT FIELD DATA:

Flow Dissolved Oxygen TRC (Contact Tank) NA MGD NA mg/L NA mg/L

pH Temperature TRC (Final Effluent) NA S.U. NA ˚C NA mg/L

Was a Sampling Inspection conducted? Yes (see Sampling Inspection Report) No

CONDITION OF OUTFALL AND EFFLUENT CHARACTERISTICS:

Shore based Submerged Yes No 1. Type of outfall: Diffuser? Yes No 2. Are the outfall and supporting structures in good condition? Sludge bar Grease 3. Final Effluent (evidence of following problems): Turbid effluent Visible foam Unusual color Oil sheen

Yes No 4. Is there a visible effluent plume in the receiving stream? No observed problems Indication of problems (explain below) 5. Receiving stream: Comments: Clear, odor-free discharge was occurring during the inspection.

REQUEST for CORRECTIVE ACTION:

None.

NOTES and COMMENTS: Provide written confirmation that all of the drains in both boiler rooms have been plugged.

Contact your local jurisdiction to determine and then install proper signage on the diesel tank outside of the boiler rooms. DEQ has determined that this tank is registered with a capacity of 10,000 gallons. Feel free to contact Michael Clark, UST & AST Compliance Inspector, at [email protected] if you have further question about the tank.

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 3 Permit # VA0064181 RECON INSPECTION REPORT

PHOTOS Septic tank School Dosing tank

Splitter box

1. Looking east toward the school building from the facility. 2. Looking west at flow (arrow) from the dosing tank (circle) to the splitter box and sand filters (squares). Splitter Box Splitter box

3. Looking east from the sand filters toward the splitter box. 4. Looking east toward the splitter box from the chlorination and dechlorination units.

5. Chlorination unit. 6. Dechlorination unit.

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 4 Permit # VA0064181 RECON INSPECTION REPORT

Outfall 001

Sorbent booms and Outfall 001

Sorbent booms

7. Looking east downstream of Outfall 001. 8. Closer view of Outfall 001.

9. Inside Boiler Room #2 and area that was leaking diesel fuel 10. Plugged drain in Boiler Room #2. (circle).

11. Unplugged drain in Boiler Room #2. 12. Unplugged drain in Boiler Room #1.

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 5 Permit # VA0064181 RECON INSPECTION REPORT

13. Diesel storage tank outside of the boiler rooms. Photos and layout by Mark Evans

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 6

COMMONWEALTH of VIRGINIA

DEPARTMENT OF ENVIRONMENTAL QUALITY NORTHERN REGIONAL OFFICE

Matthew J. Strickler 13901 Crown Court, Woodbridge, Virginia 22193 David K. Paylor Director Secretary of Natural Resources (703) 583-3800 www.deq.virginia.gov Thomas A. Faha Regional Director

April 20, 2018

Shannon Grimsley Superintendent Rappahannock County Public Schools 6 Schoolhouse Road Washington, VA 22747

Re: Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181

Dear Ms. Grimsley,

Enclosed are observations made on April 12, 2018 while performing a Facility Recon Inspection at the Rappahannock High School - Wastewater Treatment Plant (WWTP). This letter is not intended as a case decision under the Virginia Administrative Process Act, Va. Code § 2.2-4000 et seq. (APA).

If you have any questions or comments concerning this report, please feel free to contact me at the Northern Regional Office at (703) 583-3811 or by E-mail at [email protected].

Sincerely,

Mark Evans Environmental Specialist II cc: Permit/DMR File Electronic Copy: Compliance Manager, Compliance Auditor Ms. Pamela Parker [email protected]

Permit # VA0064181 RECON INSPECTION REPORT

Virginia Department of Environmental Quality

FACILITY NAME: INSPECTION DATE: April 12, 2018 Rappahannock High School WWTP INSPECTOR: Mark Evans

PERMIT No.: VA0064181 REPORT DATE: April 18, 2018 TYPE OF TIME OF INSPECTION: FACILITY: Municipal Major 1:30 pm 2:00 pm

Industrial Minor TOTAL TIME SPENT Federal Small Minor 4 Hours HP LP

PHOTOGRAPHS: Yes No UNANNOUNCED INSPECTION? Yes No

REVIEWED BY / Date: 4/19/18 PRESENT DURING INSPECTION: Ms. Pamela Parker, Operator

INSPECTION OVERVIEW AND CONDITION OF TREATMENT UNITS

Mr. Evans arrived at the facility at 1:30 pm and met Ms. Parker, explaining that the purpose of the inspection was to briefly review the facility’s level of compliance with its Virginia Pollution Discharge Elimination System (VPDES) permit. The inspection consisted of a brief tour of the plant (photos 1 to 6), which consists of a grease trap and septic tank that flow to a dosing chamber through a distribution box into three sand filters draining to tablet chlorination and dechlorination units then through a weir and post-aeration to Outfall 001. The facility grounds were well maintained and good housekeeping practices were observed. Mr. Evans departed the facility at 2:00 pm.

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 2 Permit # VA0064181 RECON INSPECTION REPORT

EFFLUENT FIELD DATA:

Flow Dissolved Oxygen TRC (Contact Tank) NA MGD NA mg/L NA mg/L

pH Temperature TRC (Final Effluent) NA S.U. NA ˚C NA mg/L

Was a Sampling Inspection conducted? Yes (see Sampling Inspection Report) No

CONDITION OF OUTFALL AND EFFLUENT CHARACTERISTICS:

Shore based Submerged Yes No 1. Type of outfall: Diffuser? Yes No 2. Are the outfall and supporting structures in good condition? Sludge bar Grease 3. Final Effluent (evidence of following problems): Turbid effluent Visible foam Unusual color Oil sheen

Yes No 4. Is there a visible effluent plume in the receiving stream? No observed problems Indication of problems (explain below) 5. Receiving stream: Comments: No discharge was occurring during the inspection.

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 3 Permit # VA0064181 RECON INSPECTION REPORT

REQUEST for CORRECTIVE ACTION:

None.

NOTES and COMMENTS: None

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 4 Permit # VA0064181 RECON INSPECTION REPORT

PHOTOS

Septic tank

Sand filters

Pump

Dosing tank

Splitter Box

1. Looking east toward the school building from the facility. 2. Looking west from the dosing tank in photo 1.

3. Looking west from the sand filters toward the chlorination 4. Close-up of chlorination and dechlorination units. and dechlorination units.

5. Looking back toward sand filters from chlorination unit. 6. Outfall 001 (not discharging). Photos and layout by Mark Evans

Recon Inspection at Rappahannock High School Wastewater Treatment Plant – Permit # VA0064181 Page 5

COMMONWEALTH of VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY NORTHERN REGIONAL OFFICE 13901 Crown Court, Woodbridge, Virginia 22193

(703) 583-3800 Fax (703) 583-3821 David K. Paylor Director www.deq.virginia.gov Molly Joseph Ward Secretary of Natural Resources Thomas A. Faha Regional Director

December 2, 2015

Donna Mathews Superintendent Rappahannock County Public Schools 6 Schoolhouse Road Washington, VA 22747

Re: Rappahannock High School -Technical and Laboratory Inspection, Permit VA0064181

Dear Ms. Mathews,

Enclosed is a copy of a facility inspection report generated from observations made on October 22, 2015 while performing a Facility Technical and Laboratory Inspection at Rappahannock High School – Sewage Treatment Plant (STP). The compliance staff would like to thank Pamela Parker, Jimmy Swindler, and Troy Jenkins Sr. for their time and assistance during the inspection. This letter is not intended as a case decision under the Virginia Administrative Process Act, Va. Code § 2.2-4000 et seq. (APA).

A written response concerning the items listed in the Compliance Recommendations for Action is due to this office by January 2, 2015. Included in this response should be a plan of action and timetable for resolving this compliance issue, if it has not already been addressed. Should you choose to respond, your response may be sent either via the US Postal Service or electronically, via E-mail. DEQ recommends sending electronic responses as an Acrobat PDF or in a Word-compatible, write-protected format. Additional inspections may be conducted to confirm the facility is in compliance with permit requirements.

If you have any questions or comments concerning this report, please feel free to contact me at the Northern Regional Office at (703) 583-3801 or by E-mail at [email protected].

Sincerely,

Lisa Janovsky Environmental Specialist II cc: Permit/DMR File; Water Compliance Manager

VPDES NO. VA0064181

DEQ WASTEWATER FACILITY INSPECTION REPORT PREFACE VPDES/State Certification No. (RE) Issuance Date Amendment Date Expiration Date

VA0064181 01/12/2015 01/11/2020

Facility Name Address Telephone Number

12576 Lee Highway Rappahannock County High School 540-227-0023 Washington, VA 22747

Owner Name Address Telephone Number

Rappahannock County Public Schools 6 Schoolhouse Road 540-227-0023 Washington, VA 22747 Responsible Official Title Telephone Number

Donna Mathews Superintendent 540-227-0023

Responsible Operator Operator Cert. Class/number Telephone Number

Rappahannock Water and Sewer Authority (Pamela Class III / 1965007957 540-987-3185 Parker)

TYPE OF FACILITY:

DOMESTIC INDUSTRIAL

Federal Major Major Primary

Non-federal X Minor X Minor Secondary

INFLUENT CHARACTERISTICS: DESIGN:

Flow, MGD 0.008

Connections Served 2

EFFLUENT LIMITS: mg/L unless otherwise noted. WWTP OUTFALL 001

Parameter Min. Avg. Max. Parameter Min. Avg. Max.

Flow NA NL NL Ammonia, as N NA 22 22

pH (S.U.) 6 9 E.Coli NA 126 NA

TRC (after contact BOD 20 30 1.0 NA NA 5 tank)

TRC (after TSS 20 30 NA 0.009 0.011 dechlorination)

D.O. 6.0 NA NA

Receiving Stream Covington River, UT

Basin Rappahannock River Basin

Discharge Point (LAT) 38º 41’ 05” N

Discharge Point (LONG) 78º 11’ 25” W

2 Revised: 06-2011

VPDES NO. VA0064181

Virginia Department of Environmental Quality

WASTEWATER FACILITY INSPECTION REPORT

FACILITY NAME: Rappahannock County High INSPECTION DATE: October 22, 2015 School INSPECTOR: Lisa Janovsky

PERMIT No.: VA0064181 REPORT DATE: November 23, 2015 TYPE OF TIME OF INSPECTION: Municipal Small Minor FACILITY: 10: 45 am 11:30 am Industrial TOTAL TIME SPENT 15 hours Federal

PHOTOGRAPHS: Yes No UNANNOUNCED Yes No INSPECTION? REVIEWED BY / Date: 11/29/15 PRESENT DURING INSPECTION: Amy Dooley – DEQ Jimmy Swindler – Rappahannock County Public Schools (RCPS) Pamela Parker – Rappahannock County Service Authority (RCSA) Troy Jenkins Sr. – Environmental System Services (ESS)

TECHNICAL INSPECTION 1. Has there been any new construction? Yes No  If so, were plans and specifications approved? Comments: 2. Is the Operations and Maintenance Manual approved and up-to-date? Yes No Comments: 3. Are the Permit and/or Operation and Maintenance Manual specified licensed operator Yes No being met? Comments: 4. Are the Permit and/or Operation and Maintenance Manual specified operator staffing Yes No requirements being met? Comments: 5. Is there an established and adequate program for training personnel? Yes No Comments: 6. Are preventive maintenance task schedules being met? Yes No Comments: 7. Does the plant experience any organic or hydraulic overloading? Yes No Comments: 8. Has there been any bypassing or overflows since the last inspection? Yes No Comments: 9. Is the standby generator (including power transfer switch) operational and exercised Yes No regularly? Comments: N/A 10. Is the plant alarm system operational and tested regularly? Yes No Comments: N/A

DEQ form: 06-2011 3 VA DEQ Wastewater Facility Inspection Report Permit # VA0064181

TECHNICAL INSPECTION

11. Is sludge disposed of in accordance with the approved sludge management plan? Yes No Comments: 12. Is septage received? Yes No  If so, is septage loading controlled, and are appropriate records maintained? Comments: 13. Are all plant records (operational logs, equipment maintenance, industrial waste Yes No contributors, sampling and testing) available for review and are records adequate? Comments: Emailed to Ms. Janovsky on November 16, 2015 14. Which of the following records does the plant maintain? Operational logs Instrument maintenance & calibration

Mechanical equipment maintenance Industrial Waste Contribution (Municipal facilities)

Comments: 15. What does the operational log contain? Visual observations Flow Measurement Laboratory results Process adjustments

Control calculations Other (specify)

Comments: 16. What do the mechanical equipment records contain? As built plans and specs Manufacturers instructions Lubrication schedules

Spare parts inventory Equipment/parts suppliers

Other (specify)

Comments: 17. What do the industrial waste contribution records contain (Municipal only)? Waste characteristics Impact on plant Locations and discharge types

Other (specify)

Comments: N/A 18. Which of the following records are kept at the plant and available to personnel? Equipment maintenance records Operational log Industrial contributor records

Instrumentation records Sampling and testing records

Comments: 19. List records not normally available to plant personnel and their location: Comments: All operating records are maintained at the plant, sampling/testing records are maintained at ESS, Culpeper VA, and maintenance records are maintained by the school’s maintenance department.

20. Are the records maintained for the required time period (three or five years)? Yes No Comments:

DEQ form: 06-2011 4 VA DEQ Wastewater Facility Inspection Report Permit # VA0064181

UNIT PROCESS EVALUATION SUMMARY SHEET

UNIT PROCESS APPLICABLE PROBLEMS* COMMENTS

No problems observed Sewage Pumping X

Primary Sedimentation Septic Tank X

Some ponding and vegetation growing out of Sand Filter X 1 filter

X Chlorination Tablet feeder

De-chlorination Tablet Feeder X

Post Aeration No problems observed X

X De-chlorination tablet residue was observed in Plant Outfall 1 the receiving stream

* Problem Codes 1. Unit Needs Attention 4. Unapproved Modification or Temporary Repair 2. Abnormal Influent/Effluent 5. Evidence of Process Upset 3. Evidence of Equipment Failure 6. Other (explain in comments)

DEQ form: 06-2011 5 VA DEQ Wastewater Facility Inspection Report Permit # VA0064181

INSPECTION OVERVIEW AND CONDITION OF TREATMENT UNITS

 DEQ arrived onsite at 10:45 am and met with Pamela Parker (RCSA), Troy Jenkins Sr. (ESS) and Jimmy Swindler (RCSB).

 The wastewater flows into a septic tank and is pumped up to a distribution box, which distributes flow to four sand beds. From the sand beds, the wastewater flow goes to a chlorine contact tank, de-chlorination tank, post aeration and to the outfall.

 The septic tank is pumped twice per year and the grease trap is pumped annually in the summer. Solids are taken to the Remington WWTP for disposal.

 DEQ observed some ponding on the sand beds and very slight vegetation beginning to appear (photos 1-3). See Request for Corrective Action.

 One foot of sand was replaced in all sand beds in 2006. Ms. Parker stated that they have discussed replacing additional sand but are still in the process of discussion.

 Sampling is taken at the v-notch weir after post-aeration. The outfall was accessible. There was de-chlorine tablet residue in the receiving stream (photo 6). See Request for Corrective Action.

 Ms. Parker sent the NIST certificate to Ms. Janovsky for the updated certifications on 11/16/2015. The NIST certificate for the master thermometer is dated 10/1/2015.

 Ms. Parker informed DEQ that she does not have an IDC for TRC or pH. Her IDC for D.O. was emailed to Ms. Janovsky on November 16th 2015. See laboratory report for corrective action

 The facility grounds were well maintained and good housekeeping practices were observed.

EFFLUENT FIELD DATA:

Flow Dissolved Oxygen TRC (Contact Tank) MGD 8.74 mg/L 1.90 mg/L

pH Temperature TRC (Final Effluent) 6.7 S.U. 13.3 ˚C 0.06 mg/L

Was a Sampling Inspection Yes (see Sampling Inspection Report) No conducted?

DEQ form: 06-2011 6 VA DEQ Wastewater Facility Inspection Report Permit # VA0064181

CONDITION OF OUTFALL AND EFFLUENT CHARACTERISTICS: Shore based Submerged Yes No 1. Type of outfall: Diffuser?

Yes No 2. Are the outfall and supporting structures in good condition?

Sludge bar Grease 3. Final Effluent (evidence of following problems): Turbid effluent Visible foam Unusual color Oil sheen

Yes No 4. Is there a visible effluent plume in the receiving stream?

No observed problems Indication of problems (explain below) 5. Receiving stream: Comments: The effluent was clear and odor free. However, there were flakes of de-chlorination tablets in the receiving stream (photo 6).

REQUEST for CORRECTIVE ACTION:

1. Permit VA0064181 part 1.C.2. Operation and Maintenance (O&M) Manual Requirement states: The permittee shall maintain a current Operations and Maintenance (O&M) Manual for the treatment works that is in accordance with Virginia Pollutant Discharge Elimination System Regulations, 9VAC25-31 and (for sewage treatment plants) Sewage Collection and Treatment Regulations, 9VAC25-790. The O&M Manual and subsequent revisions shall include the manual effective date and meet Part II.K.2 and Part II.K.4 Signatory Requirements of the permit. Any changes in the practices and procedures followed by the permittee shall be documented in the O&M Manual within 90 days of the effective date of the changes. The permittee shall operate the treatment works in accordance with the O&M Manual and shall make the O&M manual available to Department personnel for review during facility inspections. Within 30 days of a request by DEQ, the current O&M Manual shall be submitted to the DEQ-NRO for review and approval. The O&M Manual shall detail the practices and procedures which will be followed to ensure compliance with the requirements of this permit. This manual shall include, but not necessarily be limited to, the following items, as appropriate:

a. Permitted outfall locations and techniques to be employed in the collection, preservation, and analysis of effluent, storm water and sludge samples; b. Procedures for measuring and recording the duration and volume of treated wastewater discharged; c. Discussion of Best Management Practices, if applicable; d. Procedures for handling, storing, and disposing of all wastes, fluids, and pollutants that will prevent these materials from reaching state waters. List type and quantity of wastes, fluids, and pollutants (e.g. chemicals) stored at this facility; e. Discussion of treatment works design, treatment works operation, routine preventative maintenance of units within the treatment works, critical spare parts inventory and record keeping; f. Plan for the management and/or disposal of waste solids and residues; g. Hours of operation and staffing requirements for the plant to ensure effective operation of the treatment works and maintain permit compliance; h. List of facility, local and state emergency contacts; and i. Procedures for reporting and responding to any spills/overflows/ treatment works upsets.

Observations: There was some ponding observed in the sand bed. Maintain the sand beds and replace the sand in accordance with your O&M manual to prevent ponding and vegetation growth. Provide an explanation to DEQ as to how this issue will be addressed.

DEQ form: 06-2011 7 VA DEQ Wastewater Facility Inspection Report Permit # VA0064181

NOTES and COMMENTS:

 DEQ recommends observing the outfall on a more frequent basis to ensure that de-chlorination tablets are not making it to the receiving stream.

DEQ form: 06-2011 8 VA DEQ Wastewater Facility Inspection Report Permit # VA0064181

Photo 1: Sand filters Photo 2: Ponding water on sand filter

Photo 3: Slight vegetation in sand filters Photo 4: Chlorine Tablets

Photo 5: Dechlorination Tablets Photo 5: Dechlor tablet residue in receiving stream Photos by: Lisa Janovsky Layout by: Lisa Janovsky Photos Taken: 10/22/2015 VA0064181

DEQ form: 06-2011 9 DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER DIVISION LABORATORY INSPECTION REPORT 09/2014

PERMIT #: INSPECTION DATE: PREVIOUS INSP. DATE: PREVIOUS EVALUATION: TIME SPENT: 10/22/2015 05/22/2008 2hr VA0064171 Minor Deficiencies NAME/ADDRESS OF FACILITY: FACILITY CLASS: FACILITY TYPE: UNANNOUNCED ( ) MAJOR (X ) MUNICIPAL INSPECTION? Rappahannock County High School ( ) YES 6 Schoolhouse Road ( ) MINOR ( ) INDUSTRIAL ( X ) NO Washington, VA 22747 FFY-SCHEDULED (X) MINOR (Small) ( ) FEDERAL INSPECTION? (X) YES ( ) VPA ( ) NO INSPECTOR(S): Lisa Janovsky REVIEWER(S): PRESENT AT INSPECTION: Amy Dooley – DEQ, Pamela Parker (RCSA), Jimmy Swindler (RCPS), and Troy Jenkins Sr. (ESS). LABORATORY EVALUATION DEFICIENCIES? Yes No LABORATORY RECORDS X GENERAL SAMPLING AND ANALYSIS X pH PROCEDURE X DO PROCEDURE X TRC PROCEDURE X

VELAP CERTIFICATION (on site Environmental Laboratory) Yes No Does the laboratory have VELAP certification (interim or final)? X – Document the laboratory’s VELAP laboratory number: N/A – Document the effective date of the VELAP certification: N/A – Document the expiration date of the VELAP certification: N/A – List the certified parameters: N/A

VELAP ACCREDITATION (Commercial Environmental Laboratory) Yes No IS A VELAP ACCREDITED LAB USED FOR OTHER PERMIT REQUIRED ANALYSES? VELAP#, LAB NAME, ADDRESS and LIST PARAMETERS: X VELAP # LAB NAME PARAMETERS Environmental Systems Service, 460019 Ltd. BOD5, TSS, Ammonia, E.coli 218 N. Main St. Culpeper, VA 22701 IF PERMIT REQUIRED SAMPLE ANALYSIS IS PERFORMED AT ANOTHER X LOCATION, ARE SHIPPING PROCEDURES ADEQUATE?

COPIES: (X) DEQ - RO; (X) Owner, ( ) Other: ESS, RCPS

PERMIT #: VA0064181

LABORATORY RECORDS SECTION

LABORATORY RECORDS INCLUDE THE FOLLOWING: X SAMPLING DATE X ANALYSIS DATE X CONT MONITORING CHART X SAMPLING TIME X ANALYSIS TIME X INSTRUMENT CALIBRATION X SAMPLE LOCATION X TEST METHOD X INSTRUMENT MAINTENANCE X CERTIFICATE OF ANALYSIS WRITTEN INSTRUCTIONS INCLUDE THE FOLLOWING: X SAMPLING SCHEDULES X CALCULATIONS X ANALYSIS PROCEDURES YES NO N/A DO ALL ANALYSTS INITIAL THEIR WORK? X DO BENCH SHEETS (or LOG BOOK) INCLUDE ALL INFORMATION NECESSARY TO X DETERMINE RESULTS? IS THE DMR COMPLETE AND CORRECT? LIST MONTH(S) REVIEWED: X January 2015, April 2015, and September 2014. ARE ALL MONITORING VALUES REQUIRED BY THE PERMIT REPORTED? X DOES CHAIN OF CUSTODY DOCUMENT PROPER SAMPLE PRESERVATION WAS MET? X WHEN THE CERTIFICATE OF ANALYSIS CONTAINS FLAGGED DATA IS THE ‘FLAG’ X REPORTED ON THE DMR?

GENERAL SAMPLING AND ANALYSIS SECTION

YES NO N/A

ARE SAMPLE LOCATIONS ACCORDING TO PERMIT REQUIREMENTS? X ARE PERMIT REQUIRED SAMPLE COLLECTION PROCEDURES APPROPRIATE? X ARE EFFLUENT SAMPLES REPRESENTATIVE OF THE MONITORED ACTIVITY? X ARE PERMIT REQUIRED COMPOSITE SAMPLES FLOW PROPORTIONAL? NOTE: Equal X volume composite aliquots are acceptable if the measured flow for each aliquot is within ± 10% of the monitoring period’s average flow. Some permits specify how the composite is to be taken (e.g., 5G/8HC). IS COLLECTION SAMPLE EQUIPMENT ADEQUATE? X IS FLOW MEASUREMENT ACCORDING TO PERMIT REQUIREMENTS? X

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DEPARTMENT OF ENVIRONMENTAL QUALITY – WATER DIVISION LABORATORY INSPECTION REPORT SUMMARY

FACILITY NAME: Rappahannock County High Permit #: VA0064181 INSPECTION 10/22/2015 School DATE: LABORATORY EVALUATION X No required actions at this time REQUIRED CORRECTIVE ACTION(s) IDENTIFIED SUMMARY of REQUEST FOR CORRECTIVE ACTION Lab Records Laboratory Records section deficiency and required action: 1. None

General Sampling and Analysis General Sampling and Analysis section deficiency and required action:

Permit VA0064181 part II.A. Monitoring states:

1. Samples and measurements required by this permit shall be taken at the permit designated or approved location and be representative of the monitored activity. a. Monitoring shall be conducted according to procedures approved under Title 40 Code of Federal Regulations Part 136 or alternative methods approved by the U.S. Environmental Protection Agency, unless other procedures have been specified in this pernit. b. The permittee shall periodically calibrate and perform maintenance procedures on all monitoring and analytical instrumentation at intervals that will insure accuracy of measurements. c. Samples taken shall be analyzed in accordance with 1VAC30-45, Certification for Noncommercial Environmental Laboratories, or 1VAC30-46, Accreditation for Commercial Environmental Laboratories.

Observations:

 The Initial Demonstration of Capability was not completed for operators for the following parameters: TRC or pH.

Provide an explanation to DEQ and timeline as to when these items will be completed.

pH, D.O and TRC Analysis pH deficiency and required action: 1. None OTHER – Comments or Observations  None

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ANALYST: Pamela Parker VPDES NO VA0064181

Parameter: Hydrogen Ion (pH) Method: HACH 17-N pH Test Kit 11/2014

METHOD OF ANALYSIS: X MANUFACTURER’S (Mfr.) INSTRUCTIONS

Y N

1) Is comparator assembled correctly (i.e. color disc on center pin and lettering facing out). [Mfr.] X

2) Does the facility treat only domestic wastewater and have a design flow of < 0.040 MGD? X [Permit]

3) Was sample dechlorinated using sodium thiosulfate if TRC > 1.0 mg/L? [Mfr.] X

4) Are the vials clean and in good condition? [Permit] X

5) Is the color disc in good condition? [Permit] X

6) Are vials rinsed with sample prior to testing? [Mfr.] X

7) Are both vials used? [Mfr.] X

8) Are samples analyzed within 15 minutes of collection? [40 CFR Part 136] X

9) Are vials rinsed with sample prior to testing? [Mfr.] X

10) Is the proper volume of sample used? [Mfr.] X

11) Is the proper volume of indicator added? [Mfr.] X

12) Is the comparator held in front of a uniform light source or background? [Mfr.] X

13) Is color match determined correctly and result recorded in plant records? Note: The latest X instruction manual instructs analyst to record any value that doesn’t match a defined value on color wheel (0.5 SU increments) as a value halfway between the values. For example, record “6.75” for value in between colors for 6.5 and 7.0 SU; report as “6.8”. [Mfr.]

14) Are sample vials rinsed with deionized water after testing is complete? [Mfr] X

PROBLEMS:

 The Initial Demonstration of Capability was not completed for pH

COMMENTS: pH taken at 11:09 am by Pamela Parker: 6.7 mg/L @ 13.3°C

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ANALYST: Pamela Parker VPDES NO VA0064181

Meter: YSI 550 Parameter: Dissolved Oxygen Method: Membrane Electrode 11/2014

METHOD OF ANALYSIS:

X 21st Edition of Standard Methods (SM 21) – 4500-O G-2001 (SM 21 DO) 22nd of Standard Methods, or Online Editions of Standard Methods (SM 22) – 4500-O G-2011 (SM 22 DO)

Dissolved Oxygen (D.O.) is a method-defined analyte so modifications are Y N not allowed. [40 CFR Part 136.6] 1) Is a certificate of operator competence or initial demonstration of capability available for each analyst/operator performing this analysis? NOTE: Analyze 4 samples of air-saturated water. Recovery for each of the 4 samples must be +/- 4% of the calculated oxygen saturation for the altitude/barometric pressure and temperature of the samples. {Alternatively analyze 4 samples of X water of known concentration (verified by iodometric titration procedure SM 21 or SM 22 4500-O C). Instrument measurements must agree within +/-0.1 mg/L of verified concentration.} [SM 21 or SM 22 1020 B.1 and 4020 B.1] 2) Are calibration results (mg/L) within ± 4% of the barometric (or altitude) corrected oxygen X saturated water value? [SM 21 B.2 or SM 22 1020 B.2.]

3) If samples are collected, is collection carried out with a minimum of turbulence and air bubble formation and is the sample bottle allowed to overflow several times its volume? [SM 21 DO or In Situ SM 22 B 3.] 4) Are meter and electrode operable and providing consistent readings? [SM 21 DO G 2. or SM X 22 DO G 2.] 5) Is membrane in good condition without trapped air bubbles? NOTE: No air bubbles ≥ 1/8 X inch (total area of all bubbles). [SM 21 DO G 3.b. or SM 22 DO G 3.b.] 6) Is correct filling solution used in electrode? [Mfr.] X 7 Are water droplets shaken off the membrane prior to calibration? [Mfr.] X 8) Is meter calibrated before use or at least daily? [Mfr. & SM 21 1020 B 10.a. or SM 22 1020 B X 11.a] 9) Is calibration procedure performed according to manufacturer’s instructions? [Mfr.] X 10) Is sample stirred during analysis (or is there sufficient flow across probe’s membrane surface)? X [SM 21 DO or SM 22 DO G 3.b. and Mfr.] 11) Is the sample analysis procedure performed according to manufacturer’s instructions? [Mfr.] X 12) Is meter stabilized before reading D.O.? [Mfr.] X 13) Is electrode stored according to manufacturer’s instructions? [Mfr.] X

PROBLEMS:  None

COMMENTS:  D.O. taken @ 11:13am am by Pamela Parker: 8.74 mg/L @ 13.3ºC

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ANALYST: Pamela Parker VPDES NO. VA0064181

Parameter: Total Residual Chlorine (TRC) Method: DPD Colorimetric (HACH Pocket and Pocket II Colorimeter) 11/2014

METHOD OF ANALYSIS: Instrument: Hach pocket colorimeter II

X HACH Manufacturer’s Instructions (Method 8167) plus an edition of Standard Methods 21st Edition of Standard Methods 4500-Cl G-2000 (SM 21 Cl) 22nd Edition of Standard Methods 4500-Cl G-2011 (SM 22 Cl)

Y N 1) Is a certificate of operator competence or initial demonstration of capability available for each analyst/operator performing this analysis? NOTE: Analyze 4 samples of known TRC. Must use a lot number or source that is different from that used to prepare calibration standards. May not use X Spec√ ™. Acceptance range is 70-130% recovery and 20% Relative Standard Deviation (RSD) or within PT specified acceptance range and 20% RSD. [SM 1020 B.1] 2) Is calibration curve verification checked daily using a high and a low standard? NOTE: May use manufacturer’s installed calibration and commercially available chlorine standards, or Spec√ ™, for X daily calibration verifications. [SM 21 1020] 3) IF a replicate sample is analyzed is there a written procedure for which result will be reported on DMR (Sample or Replicate) and is this procedure being followed? [DEQ – based on EPA Good Laboratory N/A Practices Standards] 4) Is a Laboratory Control Sample (LCS) tested at least annually and are results within acceptance criteria? [SM 21 B. 2. or SM 22 1020 B 3.] NOTE: LCS should be a purchased Proficiency Test (PT) sample or if a known standard different from the calibration standards is used. Use the PT X acceptance criteria when given or use 70-130% recovery and 20% Relative Standard Deviation (RSD) as the acceptance criteria.

5) Are the DPD Powder Pillows stored in a cool, dry place? [Mfr.] X 6) Are the pillows within the manufacturer’s expiration date? [Mfr.] X 7 Are pillows appropriate for the sample size being analyzed and for Total Residual Chlorine X 8) Has buffering capability of DPD pillows been checked annually? (Pillows should adjust sample pH to X between 6 and 7) [Mfr.]

9) When pH adjustment is required, is H2SO4 or NaOH used? [Hach 11.3.1] X 10) Are cells clean and in good condition? [Mfr] X 11) Is the Hach colorimeter program set to measure “TRC, mg/L”? [Mfr.] X 12) Is the low range (0.01 mg/L resolution) used for samples containing residuals from 0.1 mg/L - 2.00 X mg/L? [Mfr.] 13) Is the 10-mL cell (2.5-cm diameter) used for samples from 0-2.00 mg/L? [Mfr.] X 14) Are samples analyzed within 15 minutes of collection? [40 CFR Part 136] X 15) Is meter zeroed correctly using sample for the blank analysis? [Mfr. and SM 21 1020 B.4. or SM 22 X 1020 B.5.]] 16) Is the instrument light screen placed correctly on the meter body when the meter is zeroed and when X the sample is analyzed? [Mfr.] Page 6 of 9

17) Is the DPD Total Chlorine Powder Pillow mixed into the sample? [Hach 11.1] X 18) Is the analysis made at least three minutes but not more than six minutes after Powder Pillow addition? X [Hach 11.2] 19) If read-out exceeds “2.19 mg/L”, is the original sample diluted correctly, and then reanalyzed within 15 NA minutes of the original collection time? [Hach 1.2 & 2.0]

COMMENTS:  The Initial Demonstration of Capability was not completed for TRC.

PROBLEMS  None :

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DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER DIVISION EQUIPMENT TEMPERATURE LOG/THERMOMETER VERIFICATION CHECK SHEET 11/2014

FACILITY NAME: Rappahannock County High School PERMIT VA0064181 DATE: October 22, 2015 NO:

ANNUAL THERMOMETER VERIFICATION

Is the NIST / NIST-Traceable Reference Yes/No Thermometer within the manufacturer’s expiration date or recertified yearly? X

EQUIPMENT Preservation In Range? Inspector Checked & Correct DATE MARKED OFFSET INSPECT Range Reading Logged Increment? CHECKED VALUE1 TEMP Daily? (Correction)

Yes No C Yes No Yes No Yes No C °C

pH METER NA NA NA NA NA NA

D.O. METER + 1° C X 08/14/15 X 0 13.3 PROBLEMS:  Facility utilizes color wheel for pH, no temperature certification required.

1 Offset Value tolerances (reference NIST 105-6): Sampling Refrigerator and Auto Sampler, pH and D.O. meters must be within ±2°C (2 times tolerance value). Thermometers measuring Outfall permit compliance must be within ±1.0°C (2 times tolerance value). Page 1 of 9

DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER DIVISION SAMPLE ANALYSIS HOLDING TIME/CONTAINER/PRESERVATION CHECK SHEET Revised 02/2015 [40 CFR, Part 136.3, Table II] FACILITY NAME: Rappahannock County High School VPDES NO VA0064181 DATE: 10/22/2015

HOLDING TIMES [Note: Collection period (for composites) and Sample Collection SAMPLE CONTAINER PRESERVATION [Note: Preservation is to occur within 15 time (end of collection period) must be recorded on the COC.] minutes of the end of the collection period.]

PARAMETER APPROVED MET? LOGGED? ADEQ. APPROP. APPROVED MET? CHECKED? VOLUME TYPE

Y N Y N Y N Y N Y N Y N

pH 15 MIN. X X X X Within 15 minutes

DISSOLVED 02 15 MIN X X In-situ NA Within 15 minutes TEMPERATURE IMMERSION In-situ X X NA N/A - Immediately STAB.

CHLORINE 15 MIN X X X X Within 15 minutes

o BOD5 & CBOD5 48 HOURS ≤6 C X X

o FECAL COLIFORM / E. coli / 8 HRS <10 C+0.008% Na2S203 X X Enterococci

TSS 7 DAYS ≤6o C X X DECHLOR AMMONIA 28 DAYS X X o ≤6 C+H2S04 pH<2t

PROBLEMS: None Holding Times and Preservation References (VELAP except for Field Tests)

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Attachment 5 To: Ann Zimmerman From: Rebecca Shoemaker

Date: September 19, 2019 Subject: Planning Statement for Rappahannock County High School Permit Number: VA0064181

Information for Outfall 001: Discharge Type: Minor, Municipal Discharge Flow: 0.005 MGD Receiving Stream: Covington River, UT Latitude / Longitude: 38°41'5"N, 78°11'25"W Rivermile: 0.05 Streamcode: 3-XDG Waterbody: VAN-E05R 6th Order HUC: RA12 Water Quality Standards: Class III, Section 4, no special standards Drainage Area: 168 acres, 0.26 mi2

1. Please provide water quality monitoring information for the receiving stream segment. If there is not monitoring information for the receiving stream segment, please provide information on the nearest downstream monitoring station, including how far downstream the monitoring station is from the outfall.

This facility discharges to an unnamed tributary to Covington River that has been neither monitored nor assessed. DEQ ambient and biological monitoring station 3-COV001.95 is located on Covington River at Route 621, approximately 2.9 miles downstream from Outfall 001. The following is the water quality summary for this segment of Covington River, as taken from the 2018 Integrated Report:

Class III, Section 4.

DEQ monitoring stations located in this segment of Covington River: • ambient and biological monitoring station 3-COV001.95 at Route 621

The aquatic life use is considered fully supporting based on biological monitoring and conventional parameter data. The recreation use is considered fully supporting. The fish consumption and wildlife uses were not assessed.

2. Does this facility discharge to a stream segment on the 303(d) list? If yes, please fill out Table A.

No.

Page 1 of 2 3. Are there any downstream 303(d) listed impairments that are relevant to this discharge? If yes, please fill out Table B.

Yes.

Table B. Information on Downstream 303(d) Impairments and TMDLs Year Distance Waterbody First TMDL Basis for Impaired Use Cause From WLA Name Listed as completed WLA Outfall Impaired Impairment Information in the 2018 Integrated Report 126 Rappahannock 8.66E+09 cfu/100ml River Basin Thornton River Recreation E. coli 2006 14 miles cfu/year E. coli Bacteria E. coli --- 01/23/2008 0.005 MGD Fish PCBs in Fish 2004 88 miles No ------Consumption Tissue This facility is accounted for in the Chesapeake Bay TMDL NPDES Permit Rappahannock Aquatic Life / Inventory and is part of River Dissolved Chesapeake Open Water 2008 90 miles an aggregated WLA for Oxygen Bay 12/29/2010 Aquatic Life total nitrogen, total phosphorus, and total suspended solids (Appendix Q).

4. Is there monitoring or other conditions that Planning/Assessment needs in the permit?

The Rappahannock River, which is located approximately 88 miles downstream of this facility, is listed with a PCB impairment. In support of PCB TMDL development, this facility is a candidate for low-level PCB monitoring, based on its designation as a minor municipal discharger. Low-level PCB analysis uses EPA Method 1668, which is capable of detecting low-level concentrations for all 209 PCB congeners. DEQ staff has concluded that low- level PCB monitoring is not warranted for this facility as it is not expected to discharge or be a source of PCBs; therefore, low-level PCBs monitoring will not be requested for this facility.

5. Fact Sheet Requirements – Please provide information regarding any drinking water intakes located within a 5 mile radius of the discharge point.

There are no public water supply intakes located within five miles of this discharge.

Page 2 of 2 Attachment 6 FRESHWATER WATER QUALITY CRITERIA / WASTELOAD ALLOCATION ANALYSIS

Facility Name: Rappahannock County High School Permit No.: VA0064181

Receiving Stream: Covington River, UT Version: OWP Guidance Memo 00-2011 (8/24/00)

1 1 0.0000001 Stream Information 1 Stream Flows Mixing Information Effluent Information 7.94E-07 7.943E-07 Mean Hardness (as CaCO3) = mg/L 1Q10 (Annual) = 0 MGD Annual - 1Q10 Mix = 0 % Mean Hardness (as CaCO3) = 50 mg/L 90% Temperature (Annual) = deg C 7Q10 (Annual) = 0 MGD - 7Q10 Mix = 0 % 90% Temp (Annual) = 20 deg C 90% Temperature (Wet season) = deg C 30Q10 (Annual) = 0 MGD - 30Q10 Mix = 0 % 90% Temp (Wet season) = deg C 90% Maximum pH = SU 1Q10 (Wet season) = 0 MGD Wet Season - 1Q10 Mix = 0 % 90% Maximum pH = 7 SU 10% Maximum pH = SU 30Q10 (Wet season) = 0 MGD - 30Q10 Mix = 0 % 10% Maximum pH = 6.1 SU Tier Designation (1 or 2) = 1 30Q5 = 0 MGD Discharge Flow = 0.005 MGD Public Water Supply (PWS) Y/N? = n Harmonic Mean = 0 MGD Trout Present Y/N? = n Early Life Stages Present Y/N? = y

Parameter Background Water Quality Criteria Wasteload Allocations Antidegradation Baseline Antidegradation Allocations Most Limiting Allocations Method (ug/l unless noted) Conc. Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Target Value Acenapthene 0 -- -- na 9.9E+02 -- -- na 9.9E+02 ------na 9.9E+02 9.9E+02 Acrolein 0 3.0E+00 3.0E+00 na 9.3E+00 3.0E+00 3.0E+00 na 9.3E+00 ------3.0E+00 3.0E+00 na 9.3E+00 1.2E+00 C Acrylonitrile 0 -- -- na 2.5E+00 -- -- na 2.5E+00 ------na 2.5E+00 2.5E+00 C Aldrin 0 3.0E+00 -- na 5.0E-04 3.0E+00 -- na 5.0E-04 ------3.0E+00 -- na 5.0E-04 5.0E-04 Ammonia-N (mg/l) (Yearly) 0 3.61E+01 4.15E+00 na -- 3.61E+01 4.15E+00 na ------3.61E+01 4.15E+00 na -- 2.5E+00 Ammonia-N (mg/l) (High Flow) 0 3.61E+01 5.91E+00 na -- 3.61E+01 5.91E+00 na ------3.61E+01 5.91E+00 na -- 3.5E+00 Anthracene 0 -- -- na 4.0E+04 -- -- na 4.0E+04 ------na 4.0E+04 4.0E+04 Antimony 0 -- -- na 6.4E+02 -- -- na 6.4E+02 ------na 6.4E+02 6.4E+02 Arsenic 0 3.4E+02 1.5E+02 na -- 3.4E+02 1.5E+02 na ------3.4E+02 1.5E+02 na -- 9.0E+01 Barium 0 -- -- na ------na ------na -- 0.0E+00 C Benzene 0 -- -- na 5.1E+02 -- -- na 5.1E+02 ------na 5.1E+02 5.1E+02 C Benzidine 0 -- -- na 2.0E-03 -- -- na 2.0E-03 ------na 2.0E-03 2.0E-03 C Benzo (a) anthracene 0 -- -- na 1.8E-01 -- -- na 1.8E-01 ------na 1.8E-01 1.8E-01 C Benzo (b) fluoranthene 0 -- -- na 1.8E-01 -- -- na 1.8E-01 ------na 1.8E-01 1.8E-01 C Benzo (k) fluoranthene 0 -- -- na 1.8E-01 -- -- na 1.8E-01 ------na 1.8E-01 1.8E-01 C Benzo (a) pyrene 0 -- -- na 1.8E-01 -- -- na 1.8E-01 ------na 1.8E-01 1.8E-01 C Bis2-Chloroethyl Ether 0 -- -- na 5.3E+00 -- -- na 5.3E+00 ------na 5.3E+00 5.3E+00 Bis2-Chloroisopropyl Ether 0 -- -- na 6.5E+04 -- -- na 6.5E+04 ------na 6.5E+04 6.5E+04 C Bis 2-Ethylhexyl Phthalate 0 -- -- na 2.2E+01 -- -- na 2.2E+01 ------na 2.2E+01 2.2E+01 C Bromoform 0 -- -- na 1.4E+03 -- -- na 1.4E+03 ------na 1.4E+03 1.4E+03 Butylbenzylphthalate 0 -- -- na 1.9E+03 -- -- na 1.9E+03 ------na 1.9E+03 1.9E+03 Cadmium 0 1.8E+00 6.6E-01 na -- 1.8E+00 6.6E-01 na ------1.8E+00 6.6E-01 na -- 3.9E-01 C Carbon Tetrachloride 0 -- -- na 1.6E+01 -- -- na 1.6E+01 ------na 1.6E+01 1.6E+01 Carbaryl 2.1E+00 2.1E+00 na -- 2.1E+00 2.1E+00 na ------2.1E+00 2.1E+00 na -- 8.4E-01 C Chlordane 0 2.4E+00 4.3E-03 na 8.1E-03 2.4E+00 4.3E-03 na 8.1E-03 ------2.4E+00 4.3E-03 na 8.1E-03 2.6E-03 Chloride 0 8.6E+05 2.3E+05 na -- 8.6E+05 2.3E+05 na ------8.6E+05 2.3E+05 na -- 1.4E+05 TRC 0 1.9E+01 1.1E+01 na -- 1.9E+01 1.1E+01 na ------1.9E+01 1.1E+01 na -- 6.6E+00 Chlorobenzene 0 -- -- na 1.6E+03 -- -- na 1.6E+03 ------na 1.6E+03 1.6E+03

page 1 of 12 Attachment 6_MSTRANTI - Freshwater WLAs 9/20/2019 - 10:11 AM Parameter Background Water Quality Criteria Wasteload Allocations Antidegradation Baseline Antidegradation Allocations Most Limiting Allocations Method (ug/l unless noted) Conc. Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Target Value C Chlorodibromomethane 0 -- -- na 1.3E+02 -- -- na 1.3E+02 ------na 1.3E+02 1.3E+02 Chloroform 0 -- -- na 1.1E+04 -- -- na 1.1E+04 ------na 1.1E+04 1.1E+04 2-Chloronaphthalene 0 -- -- na 1.6E+03 -- -- na 1.6E+03 ------na 1.6E+03 1.6E+03 2-Chlorophenol 0 -- -- na 1.5E+02 -- -- na 1.5E+02 ------na 1.5E+02 1.5E+02 Chlorpyrifos 0 8.3E-02 4.1E-02 na -- 8.3E-02 4.1E-02 na ------8.3E-02 4.1E-02 na -- 2.5E-02 Chromium III 0 3.2E+02 4.2E+01 na -- 3.2E+02 4.2E+01 na ------3.2E+02 4.2E+01 na -- 2.5E+01 Chromium VI 0 1.6E+01 1.1E+01 na -- 1.6E+01 1.1E+01 na ------1.6E+01 1.1E+01 na -- 6.4E+00 Chromium, Total 0 -- -- 1.0E+02 ------na ------na -- 0.0E+00 C Chrysene 0 -- -- 3.8E-02 1.8E-02 -- -- na 1.8E-02 ------na 1.8E-02 1.8E-02 Copper 0 7.0E+00 5.0E+00 na -- 7.0E+00 5.0E+00 na ------7.0E+00 5.0E+00 na -- 2.8E+00 Cyanide, Free 0 2.2E+01 5.2E+00 na 1.6E+04 2.2E+01 5.2E+00 na 1.6E+04 ------2.2E+01 5.2E+00 na 1.6E+04 3.1E+00 C DDD 0 -- -- na 3.1E-03 -- -- na 3.1E-03 ------na 3.1E-03 3.1E-03 C DDE 0 -- -- na 2.2E-03 -- -- na 2.2E-03 ------na 2.2E-03 2.2E-03 C DDT 0 1.1E+00 1.0E-03 na 2.2E-03 1.1E+00 1.0E-03 na 2.2E-03 ------1.1E+00 1.0E-03 na 2.2E-03 6.0E-04 Demeton 0 -- 1.0E-01 na -- -- 1.0E-01 na ------1.0E-01 na -- 1.0E-01 Diazinon 0 1.7E-01 1.7E-01 na -- 1.7E-01 1.7E-01 na ------1.7E-01 1.7E-01 na -- 6.8E-02 C Dibenz(a,h)anthracene 0 -- -- na 1.8E-01 -- -- na 1.8E-01 ------na 1.8E-01 1.8E-01 1,2-Dichlorobenzene 0 -- -- na 1.3E+03 -- -- na 1.3E+03 ------na 1.3E+03 1.3E+03 1,3-Dichlorobenzene 0 -- -- na 9.6E+02 -- -- na 9.6E+02 ------na 9.6E+02 9.6E+02 1,4-Dichlorobenzene 0 -- -- na 1.9E+02 -- -- na 1.9E+02 ------na 1.9E+02 1.9E+02 C 3,3-Dichlorobenzidine 0 -- -- na 2.8E-01 -- -- na 2.8E-01 ------na 2.8E-01 2.8E-01 C Dichlorobromomethane 0 -- -- na 1.7E+02 -- -- na 1.7E+02 ------na 1.7E+02 1.7E+02 C 1,2-Dichloroethane 0 -- -- na 3.7E+02 -- -- na 3.7E+02 ------na 3.7E+02 3.7E+02 1,1-Dichloroethylene 0 -- -- na 7.1E+03 -- -- na 7.1E+03 ------na 7.1E+03 7.1E+03 1,2-trans-dichloroethylene 0 -- -- na 1.0E+04 -- -- na 1.0E+04 ------na 1.0E+04 1.0E+04 2,4-Dichlorophenol 0 -- -- na 2.9E+02 -- -- na 2.9E+02 ------na 2.9E+02 2.9E+02 2,4-Dichlorophenoxy acetic acid (2,4-D) 0 -- -- na ------na ------na -- 0.0E+00 1,2-DichloropropaneC 0 -- -- na 1.5E+02 -- -- na 1.5E+02 ------na 1.5E+02 1.5E+02 1,3-Dichloropropene C 0 -- -- na 2.1E+02 -- -- na 2.1E+02 ------na 2.1E+02 2.1E+02 C Dieldrin 0 2.4E-01 5.6E-02 na 5.4E-04 2.4E-01 5.6E-02 na 5.4E-04 ------2.4E-01 5.6E-02 na 5.4E-04 5.4E-04 Diethyl Phthalate 0 -- -- na 4.4E+04 -- -- na 4.4E+04 ------na 4.4E+04 4.4E+04 2,4-Dimethylphenol 0 -- -- na 8.5E+02 -- -- na 8.5E+02 ------na 8.5E+02 8.5E+02 Dimethyl Phthalate 0 -- -- na 1.1E+06 -- -- na 1.1E+06 ------na 1.1E+06 1.1E+06 Di-n-Butyl Phthalate 0 -- -- na 4.5E+03 -- -- na 4.5E+03 ------na 4.5E+03 4.5E+03 2,4 Dinitrophenol 0 -- -- na 5.3E+03 -- -- na 5.3E+03 ------na 5.3E+03 5.3E+03 2-Methyl-4,6-Dinitrophenol 0 -- -- na 2.8E+02 -- -- na 2.8E+02 ------na 2.8E+02 2.8E+02 C 2,4-Dinitrotoluene 0 -- -- na 3.4E+01 -- -- na 3.4E+01 ------na 3.4E+01 3.4E+01 Dioxin 2,3,7,8- tetrachlorodibenzo-p-dioxin 0 -- -- na 5.1E-08 -- -- na 5.1E-08 ------na 5.1E-08 5.1E-08 C 1,2-Diphenylhydrazine 0 -- -- na 2.0E+00 -- -- na 2.0E+00 ------na 2.0E+00 2.0E+00 Alpha-Endosulfan 0 2.2E-01 5.6E-02 na 8.9E+01 2.2E-01 5.6E-02 na 8.9E+01 ------2.2E-01 5.6E-02 na 8.9E+01 3.4E-02 Beta-Endosulfan 0 2.2E-01 5.6E-02 na 8.9E+01 2.2E-01 5.6E-02 na 8.9E+01 ------2.2E-01 5.6E-02 na 8.9E+01 3.4E-02 Alpha + Beta Endosulfan 0 2.2E-01 5.6E-02 -- -- 2.2E-01 5.6E-02 ------2.2E-01 5.6E-02 -- -- 3.4E-02 Endosulfan Sulfate 0 -- -- na 8.9E+01 -- -- na 8.9E+01 ------na 8.9E+01 8.9E+01 Endrin 0 8.6E-02 3.6E-02 na 6.0E-02 8.6E-02 3.6E-02 na 6.0E-02 ------8.6E-02 3.6E-02 na 6.0E-02 2.2E-02 Endrin Aldehyde 0 -- -- na 3.0E-01 -- -- na 3.0E-01 ------na 3.0E-01 3.0E-01

page 2 of 12 Attachment 6_MSTRANTI - Freshwater WLAs 9/20/2019 - 10:11 AM Parameter Background Water Quality Criteria Wasteload Allocations Antidegradation Baseline Antidegradation Allocations Most Limiting Allocations Method (ug/l unless noted) Conc. Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Target Value Ethylbenzene 0 -- -- na 2.1E+03 -- -- na 2.1E+03 ------na 2.1E+03 2.1E+03 Fluoranthene 0 -- -- na 1.4E+02 -- -- na 1.4E+02 ------na 1.4E+02 1.4E+02 Fluorene 0 -- -- na 5.3E+03 -- -- na 5.3E+03 ------na 5.3E+03 5.3E+03 Foaming Agents 0 -- -- na ------na ------na -- 0.0E+00 Guthion 0 -- 1.0E-02 na -- -- 1.0E-02 na ------1.0E-02 na -- 1.0E-02 C Heptachlor 0 5.2E-01 3.8E-03 na 7.9E-04 5.2E-01 3.8E-03 na 7.9E-04 ------5.2E-01 3.8E-03 na 7.9E-04 7.9E-04 C Heptachlor Epoxide 0 5.2E-01 3.8E-03 na 3.9E-04 5.2E-01 3.8E-03 na 3.9E-04 ------5.2E-01 3.8E-03 na 3.9E-04 3.9E-04 C Hexachlorobenzene 0 -- -- na 2.9E-03 -- -- na 2.9E-03 ------na 2.9E-03 2.9E-03 C Hexachlorobutadiene 0 -- -- na 1.8E+02 -- -- na 1.8E+02 ------na 1.8E+02 1.8E+02 Hexachlorocyclohexane C Alpha-BHC 0 -- -- na 4.9E-02 -- -- na 4.9E-02 ------na 4.9E-02 4.9E-02 Hexachlorocyclohexane C Beta-BHC 0 -- -- na 1.7E-01 -- -- na 1.7E-01 ------na 1.7E-01 1.7E-01 Hexachlorocyclohexane C Gamma-BHC (Lindane) 0 9.5E-01 na na 1.8E+00 9.5E-01 -- na 1.8E+00 ------9.5E-01 -- na 1.8E+00 3.8E-01 Hexachlorocyclopentadiene 0 -- -- na 1.1E+03 -- -- na 1.1E+03 ------na 1.1E+03 1.1E+03 C Hexachloroethane 0 -- -- na 3.3E+01 -- -- na 3.3E+01 ------na 3.3E+01 3.3E+01 Hydrogen Sulfide 0 -- 2.0E+00 na -- -- 2.0E+00 na ------2.0E+00 na -- 2.0E+00 C Indeno (1,2,3-cd) pyrene 0 -- -- na 1.8E-01 -- -- na 1.8E-01 ------na 1.8E-01 1.8E-01 Iron 0 -- -- na ------na ------na -- 0.0E+00 C Isophorone 0 -- -- na 9.6E+03 -- -- na 9.6E+03 ------na 9.6E+03 9.6E+03 Kepone 0 -- 0.0E+00 na -- -- 0.0E+00 na ------0.0E+00 na -- 0.0E+00 Lead 0 4.4E+01 5.0E+00 na -- 4.4E+01 5.0E+00 na ------4.4E+01 5.0E+00 na -- 3.0E+00 Malathion 0 -- 1.0E-01 na -- -- 1.0E-01 na ------1.0E-01 na -- 1.0E-01 Mercury 0 1.4E+00 7.7E-01 - - - - 1.4E+00 7.7E-01 ------1.4E+00 7.7E-01 - - - - 4.6E-01 Methyl Bromide 0 -- -- na 1.5E+03 -- -- na 1.5E+03 ------na 1.5E+03 1.5E+03 C Methylene Chloride 0 -- -- na 5.9E+03 -- -- na 5.9E+03 ------na 5.9E+03 5.9E+03 Methoxychlor 0 -- 3.0E-02 na -- -- 3.0E-02 na ------3.0E-02 na -- 1.8E-02 Mirex 0 -- 0.0E+00 na -- -- 0.0E+00 na ------0.0E+00 na -- 0.0E+00 Nickel 0 1.0E+02 1.1E+01 na 4.6E+03 1.0E+02 1.1E+01 na 4.6E+03 ------1.0E+02 1.1E+01 na 4.6E+03 6.8E+00 Nitrate (as N) 0 -- -- na ------na ------na -- 0.0E+00 Nitrobenzene 0 -- -- na 6.9E+02 -- -- na 6.9E+02 ------na 6.9E+02 6.9E+02 C N-Nitrosodimethylamine 0 -- -- na 3.0E+01 -- -- na 3.0E+01 ------na 3.0E+01 3.0E+01 C N-Nitrosodiphenylamine 0 -- -- na 6.0E+01 -- -- na 6.0E+01 ------na 6.0E+01 6.0E+01 C N-Nitrosodi-n-propylamine 0 -- -- na 5.1E+00 -- -- na 5.1E+00 ------na 5.1E+00 5.1E+00 Nonylphenol 0 2.8E+01 6.6E+00 -- -- 2.8E+01 6.6E+00 na ------2.8E+01 6.6E+00 na -- 4.0E+00 Parathion 0 6.5E-02 1.3E-02 na -- 6.5E-02 1.3E-02 na ------6.5E-02 1.3E-02 na -- 7.8E-03 C PCB Total 0 -- 1.4E-02 na 6.4E-04 -- 1.4E-02 na 6.4E-04 ------1.4E-02 na 6.4E-04 6.4E-04 C Pentachlorophenol 0 3.5E+00 2.7E+00 na 3.0E+01 3.5E+00 2.7E+00 na 3.0E+01 ------3.5E+00 2.7E+00 na 3.0E+01 1.4E+00 Phenol 0 -- -- na 8.6E+05 -- -- na 8.6E+05 ------na 8.6E+05 8.6E+05 Pyrene 0 -- -- na 4.0E+03 -- -- na 4.0E+03 ------na 4.0E+03 4.0E+03 Radionuclides 0 -- -- na ------na ------na -- Gross Alpha Activity (pCi/L) 0 -- -- na ------na ------na -- 0.0E+00 Beta and Photon Activity (mrem/yr) 0 -- -- na ------na ------na -- 0.0E+00 Radium 226 + 228 (pCi/L) 0 -- -- na ------na ------na -- 0.0E+00 Uranium (ug/l) 0 -- -- na ------na ------na -- 0.0E+00

page 3 of 12 Attachment 6_MSTRANTI - Freshwater WLAs 9/20/2019 - 10:11 AM Parameter Background Water Quality Criteria Wasteload Allocations Antidegradation Baseline Antidegradation Allocations Most Limiting Allocations Method (ug/l unless noted) Conc. Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Acute Chronic HH (PWS) HH Target Value Selenium, Total Recoverable 0 2.0E+01 5.0E+00 na 4.2E+03 2.0E+01 5.0E+00 na 4.2E+03 ------2.0E+01 5.0E+00 na 4.2E+03 3.0E+00 Silver 0 1.0E+00 -- na -- 1.0E+00 -- na ------1.0E+00 -- na -- 4.2E-01 Sulfate 0 -- -- na ------na ------na -- 0.0E+00 C 1,1,2,2-Tetrachloroethane 0 -- -- na 4.0E+01 -- -- na 4.0E+01 ------na 4.0E+01 4.0E+01 C Tetrachloroethylene 0 -- -- na 3.3E+01 -- -- na 3.3E+01 ------na 3.3E+01 3.3E+01 Thallium 0 -- -- na 4.7E-01 -- -- na 4.7E-01 ------na 4.7E-01 4.7E-01 Toluene 0 -- -- na 6.0E+03 -- -- na 6.0E+03 ------na 6.0E+03 6.0E+03 Total dissolved solids 0 -- -- na ------na ------na -- 0.0E+00 C Toxaphene 0 7.3E-01 2.0E-04 na 2.8E-03 7.3E-01 2.0E-04 na 2.8E-03 ------7.3E-01 2.0E-04 na 2.8E-03 1.2E-04 Tributyltin 0 4.6E-01 7.2E-02 na -- 4.6E-01 7.2E-02 na ------4.6E-01 7.2E-02 na -- 4.3E-02 1,2,4-Trichlorobenzene 0 -- -- na 7.0E+01 -- -- na 7.0E+01 ------na 7.0E+01 7.0E+01 C 1,1,2-Trichloroethane 0 -- -- na 1.6E+02 -- -- na 1.6E+02 ------na 1.6E+02 1.6E+02 C Trichloroethylene 0 -- -- na 3.0E+02 -- -- na 3.0E+02 ------na 3.0E+02 3.0E+02 C 2,4,6-Trichlorophenol 0 -- -- na 2.4E+01 -- -- na 2.4E+01 ------na 2.4E+01 2.4E+01 2-(2,4,5-Trichlorophenoxy) propionic acid (Silvex) 0 -- -- na ------na ------na -- 0.0E+00 C Vinyl Chloride 0 -- -- na 2.4E+01 -- -- na 2.4E+01 ------na 2.4E+01 2.4E+01 Zinc 0 6.5E+01 6.6E+01 na 2.6E+04 6.5E+01 6.6E+01 na 2.6E+04 ------6.5E+01 6.6E+01 na 2.6E+04 2.6E+01

Notes: 1. All concentrations expressed as micrograms/liter (ug/l), unless noted otherwise 2. Discharge flow is highest monthly average or Form 2C maximum for Industries and design flow for Municipals 3. Metals measured as Dissolved, unless specified otherwise 4. "C" indicates a carcinogenic parameter 5. Regular WLAs are mass balances (minus background concentration) using the % of stream flow entered above under Mixing Information. Antidegradation WLAs are based upon a complete mix. 6. Antideg. Baseline = (0.25(WQC - background conc.) + background conc.) for acute and chronic = (0.1(WQC - background conc.) + background conc.) for human health 7. WLAs established at the following stream flows: 1Q10 for Acute, 30Q10 for Chronic Ammonia, 7Q10 for Other Chronic, 30Q5 for Non-carcinogens and Harmonic Mean for Carcinogens. To apply mixing ratios from a model set the stream flow equal to (mixing ratio - 1), effluent flow equal to 1 and 100% mix.

page 4 of 12 Attachment 6_MSTRANTI - Freshwater WLAs 9/20/2019 - 10:11 AM 0.005 MGD DISCHARGE FLOW - STREAM MIX PER "Mix.exe"

Ammonia - Dry Season - Acute Ammonia - Dry Season - Chronic Discharge Flow Used for WQS-WLA Calculations (MGD): 0.005 90th Percentile pH (SU) 7.000 90th Percentile Temp. (deg C) 20.000 Stream Flows Total Mix Flows (7.204 - pH) 0.204 90th Percentile pH (SU) 7.000 Allocated to Mix (MGD) Stream + Discharge (MGD) (pH - 7.204) -0.204 MIN 2.002 Dry Season Wet Season Dry Season Wet Season MAX 20.000 1Q10 0.000 0.000 0.005 0.005 Trout Present Criterion (mg N/L) 24.103 (7.688 - pH) 0.688 7Q10 0.000 N/A 0.005 N/A Trout Absent Criterion (mg N/L) 36.093 (pH - 7.688) -0.688 30Q10 0.000 0.000 0.005 0.005 Trout Present? n 30Q5 0.000 N/A 0.005 N/A Effective Criterion (mg N/L) 36.093 Early LS Present Criterion (mg N/L) 4.150 Harm. Mean 0.000 N/A 0.005 N/A Early LS Absent Criterion (mg N/L) 4.150 Annual Avg. 0.000 N/A 0.005 N/A Early Life Stages Present? y Effective Criterion (mg N/L) 4.150 Stream/Discharge Mix Values Dry Season Wet Season Ammonia - Wet Season - Acute Ammonia - Wet Season - Chronic 1Q10 90th% Temp. Mix (deg C) 20.000 0.000 30Q10 90th% Temp. Mix (deg C) 20.000 0.000 90th Percentile pH (SU) 7.000 90th Percentile Temp. (deg C) 0.000 1Q10 90th% pH Mix (SU) 7.000 7.000 (7.204 - pH) 0.204 90th Percentile pH (SU) 7.000 30Q10 90th% pH Mix (SU) 7.000 7.000 (pH - 7.204) -0.204 MIN 2.850 1Q10 10th% pH Mix (SU) 6.100 N/A MAX 7.000 7Q10 10th% pH Mix (SU) 6.100 N/A Trout Present Criterion (mg N/L) 24.103 (7.688 - pH) 0.688 Trout Absent Criterion (mg N/L) 36.093 (pH - 7.688) -0.688 Calculated Formula Inputs Trout Present? n 1Q10 Hardness (mg/L as CaCO3) 50.0 50.0 Effective Criterion (mg N/L) 36.093 Early LS Present Criterion (mg N/L) 5.910 7Q10 Hardness (mg/L as CaCO3) 50.0 50.0 Early LS Absent Criterion (mg N/L) 9.596 Early Life Stages Present? y Effective Criterion (mg N/L) 5.910

0.005 MGD DISCHARGE FLOW - COMPLETE STREAM MIX

Ammonia - Dry Season - Acute Ammonia - Dry Season - Chronic Discharge Flow Used for WQS-WLA Calculations (MGD): 0.005 90th Percentile pH (SU) 7.000 90th Percentile Temp. (deg C) 20.000 100% Stream Flows Total Mix Flows (7.204 - pH) 0.204 90th Percentile pH (SU) 7.000 Allocated to Mix (MGD) Stream + Discharge (MGD) (pH - 7.204) -0.204 MIN 2.002 Dry Season Wet Season Dry Season Wet Season MAX 20.000 1Q10 0.000 0.000 0.005 0.005 Trout Present Criterion (mg N/L) 24.103 (7.688 - pH) 0.688 7Q10 0.000 N/A 0.005 N/A Trout Absent Criterion (mg N/L) 36.093 (pH - 7.688) -0.688 30Q10 0.000 0.000 0.005 0.005 Trout Present? n 30Q5 0.000 N/A 0.005 N/A Effective Criterion (mg N/L) 36.093 Early LS Present Criterion (mg N/L) 4.150 Harm. Mean 0.000 N/A 0.005 N/A Early LS Absent Criterion (mg N/L) 4.150 Annual Avg. 0.000 N/A 0.005 N/A Early Life Stages Present? y Effective Criterion (mg N/L) 4.150 Stream/Discharge Mix Values Dry Season Wet Season Ammonia - Wet Season - Acute Ammonia - Wet Season - Chronic 1Q10 90th% Temp. Mix (deg C) 20.000 0.000 30Q10 90th% Temp. Mix (deg C) 20.000 0.000 90th Percentile pH (SU) 7.000 90th Percentile Temp. (deg C) 0.000 1Q10 90th% pH Mix (SU) 7.000 7.000 (7.204 - pH) 0.204 90th Percentile pH (SU) 7.000 30Q10 90th% pH Mix (SU) 7.000 7.000 (pH - 7.204) -0.204 MIN 2.850 1Q10 10th% pH Mix (SU) 6.100 N/A MAX 7.000 7Q10 10th% pH Mix (SU) 6.100 N/A Trout Present Criterion (mg N/L) 24.103 (7.688 - pH) 0.688 Trout Absent Criterion (mg N/L) 36.093 (pH - 7.688) -0.688 Calculated Formula Inputs Trout Present? n 1Q10 Hardness (mg/L as CaCO3) = 50.000 50.000 Effective Criterion (mg N/L) 36.093 Early LS Present Criterion (mg N/L) 5.910 7Q10 Hardness (mg/L as CaCO3) = 50.000 50.000 Early LS Absent Criterion (mg N/L) 9.596 Early Life Stages Present? y Effective Criterion (mg N/L) 5.910

Attachment 6_MSTRANTI - Freshwater Ammonia 9/20/2019 - 10:11 AM Stream/Discharge Mix Values Ammonia Criteria Determinations Acute Chronic Freshwater Ammonia Criteria - Annual Saltwater Ammon. Criteria - Annual Hardness 100.00 100.00 Duration NH3-N Duration NH3-N Hardness used 100.00 100.00 Acute 36.09 Acute 42.45 90th % pH 7.00 7.00 Chronic - ELS present 3.41 3.41 Chronic 6.49 10th % pH 0.78 1.16 Chronic - ELS absent 3.41 90th % Temp (Annual) 23.17 23.07 90th % Temp (Winter) 10.00 10.00 Freshwater Ammonia Criteria - Winter Saltwater Ammon. Criteria - Winter Salinity 14.08 15.72 Duration NH3-N Duration NH3-N ` Acute 36.09 Acute 113.04 Chronic - ELS present 5.91 5.91 Chronic 17.16 Chronic - ELS absent 7.91

Saltwater Ammonia Criteria - Annual

Attachment 6_MSTRANTI - Saltwater Ammonia 9/20/2019 - 10:11 AM Attachment 7 Rappahannock High SchoolRappahannock - VA0064181

Month pH (S.U.) Temperature 1/1/2017 90th percentile pH (S.U.)7 1/2/2017 10th percentile pH (S.U.)6.1 1/3/2017 90th percentile temp (deg C) (annual) 20 1/4/2017 1/5/2017 6.3 6.4 1/6/2017 6.95 4.60 1/7/2017 1/8/2017 1/9/2017 6.90 1.50 1/10/2017 7.00 3.30 1/11/2017 7.15 5.10 1/12/2017 6.95 6.10 1/13/2017 7.50 7.60 1/14/2017 1/15/2017 1/16/2017 1/17/2017 7.50 7.10 1/18/2017 6.90 7.30 1/19/2017 6.80 7.70 1/20/2017 6.90 7.80 1/21/2017 1/22/2017 1/23/2017 6.80 8.30 1/24/2017 6.50 8.50 1/25/2017 6.80 8.20 1/26/2017 6.70 8.40 1/27/2017 6.90 8.10 1/28/2017 1/29/2017 1/30/2017 1/31/2017 6.85 6.50 2/1/2017 6.90 6.50 2/2/2017 7.00 6.60 2/3/2017 7.05 6.00 2/4/2017 2/5/2017 2/6/2017 7.10 5.50 2/7/2017 6.80 7.10 2/8/2017 6.95 7.10 2/9/2017 6.60 6.80 2/10/2017 6.90 5.30 2/11/2017 2/12/2017 2/13/2017 7.10 6.40 2/14/2017 6.30 6.80 2/15/2017 6.80 6.80 2/16/2017 6.40 6.30 2/17/2017 6.95 6.00 2/18/2017 2/19/2017 2/20/2017 6.95 8.40 2/21/2017 6.70 7.90 2/22/2017 6.50 8.60 2/23/2017 6.50 9.10 2/24/2017 6.30 9.30 2/25/2017 2/26/2017 2/27/2017 6.80 7.70 2/28/2017 6.30 9.40 Month pH (S.U.) Temperature Month pH (S.U.) Temperature Month pH (S.U.) Temperature 3/1/2017 6.00 10.20 5/1/2017 6.00 17.40 7/1/2017 3/2/2017 6.40 9.40 5/2/2017 6.00 17.30 7/2/2017 3/3/2017 6.50 8.20 5/3/2017 6.90 16.20 7/3/2017 3/4/2017 5/4/2017 6.10 16.00 7/4/2017 3/5/2017 5/5/2017 7/5/2017 3/6/2017 7.00 5.10 5/6/2017 7/6/2017 3/7/2017 6.10 8.00 5/7/2017 7/7/2017 3/8/2017 6.30 8.40 5/8/2017 6.20 14.90 7/8/2017 3/9/2017 6.20 8.70 5/9/2017 6.20 14.40 7/9/2017 3/10/2017 6.70 8.50 5/10/2017 6.10 14.20 7/10/2017 3/11/2017 5/11/2017 6.20 14.80 7/11/2017 3/12/2017 5/12/2017 6.40 14.00 7/12/2017 3/13/2017 7.05 4.60 5/13/2017 7/13/2017 3/14/2017 5/14/2017 7/14/2017 3/15/2017 6.70 5.30 5/15/2017 6.70 13.70 7/15/2017 3/16/2017 6.40 5.30 5/16/2017 6.20 14.60 7/16/2017 3/17/2017 6.50 5.20 5/17/2017 6.00 14.90 7/17/2017 3/18/2017 5/18/2017 6.30 15.70 7/18/2017 3/19/2017 5/19/2017 6.00 16.70 7/19/2017 3/20/2017 6.80 6.20 5/20/2017 7/20/2017 3/21/2017 6.20 7.70 5/21/2017 7/21/2017 3/22/2017 6.20 7.20 5/22/2017 6.70 16.50 7/22/2017 3/23/2017 6.10 6.40 5/23/2017 6.90 16.10 7/23/2017 3/24/2017 6.30 7.00 5/24/2017 6.50 16.00 7/24/2017 3/25/2017 5/25/2017 7/25/2017 3/26/2017 5/26/2017 7/26/2017 3/27/2017 6.80 9.80 5/27/2017 7/27/2017 3/28/2017 6.80 10.60 5/28/2017 7/28/2017 3/29/2017 6.50 10.70 5/29/2017 7/29/2017 3/30/2017 6.50 10.30 5/30/2017 7/30/2017 3/31/2017 6.10 10.50 5/31/2017 7/31/2017 4/1/2017 6/1/2017 8/1/2017 4/2/2017 6/2/2017 8/2/2017 4/3/2017 6.60 10.70 6/3/2017 8/3/2017 4/4/2017 6.10 12.40 6/4/2017 8/4/2017 4/5/2017 6.10 12.00 6/5/2017 8/5/2017 4/6/2017 6.10 12.70 6/6/2017 8/6/2017 4/7/2017 6.10 11.70 6/7/2017 8/7/2017 4/8/2017 6/8/2017 8/8/2017 4/9/2017 6/9/2017 8/9/2017 6.30 20.90 4/10/2017 6.50 11.20 6/10/2017 8/10/2017 6.50 21.00 4/11/2017 6.40 12.20 6/11/2017 8/11/2017 6.00 21.70 4/12/2017 6/12/2017 8/12/2017 4/13/2017 6/13/2017 8/13/2017 4/14/2017 6/14/2017 8/14/2017 6.70 21.80 4/15/2017 6/15/2017 8/15/2017 6.20 22.50 4/16/2017 6/16/2017 8/16/2017 4/17/2017 6/17/2017 8/17/2017 4/18/2017 6.20 14.10 6/18/2017 8/18/2017 4/19/2017 6.10 13.80 6/19/2017 8/19/2017 4/20/2017 6.30 14.50 6/20/2017 8/20/2017 4/21/2017 6.20 15.30 6/21/2017 8/21/2017 4/22/2017 6/22/2017 8/22/2017 4/23/2017 6/23/2017 8/23/2017 4/24/2017 6.30 13.40 6/24/2017 8/24/2017 4/25/2017 6.40 14.60 6/25/2017 8/25/2017 4/26/2017 6.00 14.40 6/26/2017 8/26/2017 4/27/2017 6.10 14.90 6/27/2017 8/27/2017 4/28/2017 6.00 15.30 6/28/2017 8/28/2017 4/29/2017 6/29/2017 8/29/2017 4/30/2017 6/30/2017 8/30/2017 8/31/2017 Month pH (S.U.) Temperature Month pH (S.U.) Temperature Month pH (S.U.) Temperature 9/1/2017 6.00 20.60 10/31/2017 6.30 13.20 1/1/2018 9/2/2017 11/1/2017 6.30 15.90 1/2/2018 9/3/2017 11/2/2017 6.70 13.90 1/3/2018 9/4/2017 11/3/2017 6.60 14.20 1/4/2018 9/5/2017 6.00 19.60 11/4/2017 1/5/2018 9/6/2017 6.00 20.20 11/5/2017 1/6/2018 9/7/2017 6.10 19.10 11/6/2017 7.20 14.30 1/7/2018 9/8/2017 6.20 18.60 11/7/2017 6.00 13.20 1/8/2018 9/9/2017 11/8/2017 6.70 12.50 1/9/2018 9/10/2017 11/9/2017 6.00 13.30 1/10/2018 9/11/2017 6.00 16.30 11/10/2017 7.30 11.70 1/11/2018 6.7 2.8 9/12/2017 6.10 18.10 11/11/2017 1/12/2018 6.7 4 9/13/2017 6.10 19.10 11/12/2017 1/13/2018 9/14/2017 6.30 19.10 11/13/2017 6.90 9.00 1/14/2018 9/15/2017 6.30 19.30 11/14/2017 6.00 10.60 1/15/2018 9/16/2017 11/15/2017 6.30 10.10 1/16/2018 6.3 1.8 9/17/2017 11/16/2017 6.90 10.90 1/17/2018 7 2.5 9/18/2017 6.20 19.90 11/17/2017 6.80 10.00 1/18/2018 6.7 3 9/19/2017 6.30 20.20 11/18/2017 1/19/2018 6.8 3.1 9/20/2017 6.00 19.70 11/19/2017 1/20/2018 9/21/2017 6.50 19.80 11/20/2017 6.70 8.50 1/21/2018 9/22/2017 6.00 20.00 11/21/2017 6.50 8.50 1/22/2018 7 4.8 9/23/2017 11/22/2017 1/23/2018 6.5 5.3 9/24/2017 11/23/2017 1/24/2018 7.2 5.1 9/25/2017 6.60 19.70 11/24/2017 1/25/2018 7.3 4.9 9/26/2017 6.30 20.20 11/25/2017 1/26/2018 6.9 4.5 9/27/2017 6.00 20.20 11/26/2017 1/27/2018 9/28/2017 6.20 20.50 11/27/2017 6.80 7.30 1/28/2018 9/29/2017 6.10 19.70 11/28/2017 6.00 8.80 1/29/2018 7 6.4 9/30/2017 11/29/2017 6.40 8.70 1/30/2018 6.95 5 10/1/2017 11/30/2017 6.00 8.90 1/31/2018 7.2 3.9 10/2/2017 6.00 14.50 12/1/2017 7.20 9.00 2/1/2018 6.85 5.4 10/3/2017 6.40 16.40 12/2/2017 2/2/2018 6.85 4.9 10/4/2017 6.00 16.00 12/3/2017 2/3/2018 10/5/2017 12/4/2017 6.00 7.50 2/4/2018 10/6/2017 6.80 17.30 12/5/2017 6.10 9.30 2/5/2018 10/7/2017 12/6/2017 6.00 9.20 2/6/2018 6.8 4 10/8/2017 12/7/2017 6.00 8.20 2/7/2018 10/9/2017 6.30 19.90 12/8/2017 6.10 7.60 2/8/2018 6.8 4.5 10/10/2017 6.00 19.20 12/9/2017 2/9/2018 6.95 4 10/11/2017 6.70 20.40 12/10/2017 2/10/2018 10/12/2017 6.30 20.10 12/11/2017 6.80 6.00 2/11/2018 10/13/2017 6.10 18.80 12/12/2017 6.00 8.20 2/12/2018 6.8 5.8 10/14/2017 12/13/2017 6.80 5.90 2/13/2018 6.8 5 10/15/2017 12/14/2017 6.60 6.80 2/14/2018 6.95 5.3 10/16/2017 6.80 17.90 12/15/2017 7.20 5.80 2/15/2018 6.75 6.4 10/17/2017 6.00 16.40 12/16/2017 2/16/2018 6.8 7.2 10/18/2017 6.00 15.80 12/17/2017 2/17/2018 10/19/2017 6.30 17.00 12/18/2017 7.50 6.00 2/18/2018 10/20/2017 6.40 16.10 12/19/2017 6.50 7.10 2/19/2018 10/21/2017 12/20/2017 7.20 7.20 2/20/2018 6.9 7.2 10/22/2017 12/21/2017 2/21/2018 6.8 7.9 10/23/2017 6.85 15.70 12/22/2017 2/22/2018 6.6 9 10/24/2017 6.50 16.80 12/23/2017 2/23/2018 6.8 8.6 10/25/2017 6.00 15.30 12/24/2017 2/24/2018 10/26/2017 6.50 14.00 12/25/2017 2/25/2018 10/27/2017 7.50 14.20 12/26/2017 2/26/2018 6.6 8.9 10/28/2017 12/27/2017 2/27/2018 6.3 8.6 10/29/2017 12/28/2017 2/28/2018 6.5 8.3 10/30/2017 7.50 14.80 12/29/2017 12/30/2017 12/31/2017 Month pH (S.U.) Temperatur Month pH (S.U.) Temperature Month pH (S.U.) Temperature 3/1/2018 6.3 9 5/1/2018 6.3 12.1 7/1/2018 3/2/2018 5/2/2018 6.9 12.8 7/2/2018 3/3/2018 5/3/2018 6.6 13.6 7/3/2018 3/4/2018 5/4/2018 7 14.7 7/4/2018 3/5/2018 6.9 5.5 5/5/2018 7/5/2018 3/6/2018 6.9 6.9 5/6/2018 7/6/2018 3/7/2018 6.7 7.2 5/7/2018 6.7 14.1 7/7/2018 3/8/2018 6.5 6.4 5/8/2018 6.7 15.2 7/8/2018 3/9/2018 6.8 6 5/9/2018 6.9 15.2 7/9/2018 3/10/2018 5/10/2018 6.2 16.2 7/10/2018 3/11/2018 5/11/2018 6.7 16.4 7/11/2018 3/12/2018 7.1 5 5/12/2018 7/12/2018 3/13/2018 6.7 6 5/13/2018 7/13/2018 3/14/2018 6.8 5.3 5/14/2018 6.9 16.4 7/14/2018 3/15/2018 6.5 5.6 5/15/2018 6.7 16.4 7/15/2018 3/16/2018 7.1 5.6 5/16/2018 6 17.5 7/16/2018 3/17/2018 5/17/2018 6.3 17.1 7/17/2018 3/18/2018 5/18/2018 6.4 16.6 7/18/2018 3/19/2018 7.2 5.4 5/19/2018 7/19/2018 3/20/2018 6.6 6.4 5/20/2018 7/20/2018 3/21/2018 5/21/2018 6.7 15.4 7/21/2018 3/22/2018 5/22/2018 6.3 15.8 7/22/2018 3/23/2018 7 5.6 5/23/2018 6.8 16.6 7/23/2018 3/24/2018 5/24/2018 6.5 17.6 7/24/2018 3/25/2018 5/25/2018 6.9 17.6 7/25/2018 3/26/2018 5/26/2018 7/26/2018 3/27/2018 5/27/2018 7/27/2018 3/28/2018 5/28/2018 7/28/2018 3/29/2018 5/29/2018 6.5 17.6 7/29/2018 3/30/2018 5/30/2018 6.7 18.4 7/30/2018 3/31/2018 5/31/2018 6.7 18.5 7/31/2018 4/1/2018 6/1/2018 8/1/2018 4/2/2018 6/2/2018 8/2/2018 4/3/2018 7.15 8.7 6/3/2018 8/3/2018 4/4/2018 6 6.9 6/4/2018 8/4/2018 4/5/2018 6.2 9 6/5/2018 8/5/2018 4/6/2018 6.5 8.8 6/6/2018 8/6/2018 4/7/2018 6/7/2018 8/7/2018 4/8/2018 6/8/2018 8/8/2018 4/9/2018 7.05 7 6/9/2018 8/9/2018 4/10/2018 6.4 8.3 6/10/2018 8/10/2018 4/11/2018 6.8 8.6 6/11/2018 8/11/2018 4/12/2018 6.4 9 6/12/2018 8/12/2018 4/13/2018 6.8 10.5 6/13/2018 8/13/2018 4/14/2018 6/14/2018 8/14/2018 4/15/2018 6/15/2018 8/15/2018 6.3 20.5 4/16/2018 6.2 11.4 6/16/2018 8/16/2018 6.8 21 4/17/2018 6.3 10.1 6/17/2018 8/17/2018 6.3 21.2 4/18/2018 6.5 10 6/18/2018 8/18/2018 4/19/2018 6.5 10.9 6/19/2018 8/19/2018 4/20/2018 6.3 10.9 6/20/2018 8/20/2018 6.9 20.6 4/21/2018 6/21/2018 8/21/2018 6.5 21.7 4/22/2018 6/22/2018 8/22/2018 6.3 21.4 4/23/2018 6.9 10.8 6/23/2018 8/23/2018 6.3 21.2 4/24/2018 6.2 11.6 6/24/2018 8/24/2018 6.5 21.1 4/25/2018 6.3 11.8 6/25/2018 8/25/2018 4/26/2018 6.3 11.4 6/26/2018 8/26/2018 4/27/2018 6.3 12.2 6/27/2018 8/27/2018 6.5 20.6 4/28/2018 6/28/2018 8/28/2018 6.5 21.7 4/29/2018 6/29/2018 8/29/2018 6.5 21.3 4/30/2018 6.7 11.3 6/30/2018 8/30/2018 6.5 21.4 8/31/2018 6.5 21.6 Month pH (S.U.) Temperature Month pH (S.U.) Temperature Month pH (S.U.) Temperature 9/1/2018 11/1/2018 7.1 13.2 1/1/2019 9/2/2018 11/2/2018 1/2/2019 9/3/2018 11/3/2018 1/3/2019 9/4/2018 6.7 21.8 11/4/2018 1/4/2019 9/5/2018 6.3 21.8 11/5/2018 6.9 12.7 1/5/2019 9/6/2018 6.5 22.1 11/6/2018 6.9 13.9 1/6/2019 9/7/2018 6.75 22.5 11/7/2018 6.3 14.5 1/7/2019 6.5 7.7 9/8/2018 11/8/2018 6.3 14.5 1/8/2019 6.1 8.3 9/9/2018 11/9/2018 6.3 13.9 1/9/2019 7.2 7.9 9/10/2018 6.5 20.5 11/10/2018 1/10/2019 6.5 7.8 9/11/2018 6.5 20.7 11/11/2018 1/11/2019 6.9 6.8 9/12/2018 6.5 20.6 11/12/2018 6.8 12.5 1/12/2019 9/13/2018 6.3 20.8 11/13/2018 6.3 13.5 1/13/2019 9/14/2018 6.5 20.8 11/14/2018 6.1 12.8 1/14/2019 9/15/2018 11/15/2018 1/15/2019 9/16/2018 11/16/2018 1/16/2019 7.05 6.2 9/17/2018 11/17/2018 1/17/2019 6.5 6.8 9/18/2018 11/18/2018 1/18/2019 9/19/2018 6.5 21.1 11/19/2018 6.3 12.4 1/19/2019 9/20/2018 6.3 21.2 11/20/2018 6 11.9 1/20/2019 9/21/2018 6.3 21.2 11/21/2018 1/21/2019 9/22/2018 11/22/2018 1/22/2019 6.5 6.6 9/23/2018 11/23/2018 1/23/2019 6.5 6.6 9/24/2018 6.6 20.1 11/24/2018 1/24/2019 6.2 7 9/25/2018 6.3 20 11/25/2018 1/25/2019 6.5 7 9/26/2018 6.1 19.9 11/26/2018 6.2 11.5 1/26/2019 9/27/2018 6.2 19.6 11/27/2018 6.1 10.6 1/27/2019 9/28/2018 6.3 19.6 11/28/2018 6.4 9.7 1/28/2019 6.5 6.4 9/29/2018 11/29/2018 6.3 10.1 1/29/2019 6.3 6.6 9/30/2018 11/30/2018 6.7 9.4 1/30/2019 10/1/2018 6.6 19.1 12/1/2018 1/31/2019 6.4 4.3 10/2/2018 6.5 19.4 12/2/2018 2/1/2019 6.8 4.9 10/3/2018 6 19.2 12/3/2018 6.2 10.3 2/2/2019 10/4/2018 6.5 19.3 12/4/2018 6.3 10.2 2/3/2019 10/5/2018 12/5/2018 6.5 9.1 2/4/2019 6.9 5.5 10/6/2018 12/6/2018 6.7 8.6 2/5/2019 6.3 6.4 10/7/2018 12/7/2018 6.2 8.8 2/6/2019 6.7 6 10/8/2018 6.7 19.5 12/8/2018 2/7/2019 6.1 6.8 10/9/2018 6.2 20 12/9/2018 2/8/2019 6.3 7.4 10/10/2018 6 20.3 12/10/2018 2/9/2019 10/11/2018 6.3 20.5 12/11/2018 6.7 7.1 2/10/2019 10/12/2018 6.3 19.2 12/12/2018 6.5 8 2/11/2019 10/13/2018 12/13/2018 6.3 7.8 2/12/2019 6.3 6.8 10/14/2018 12/14/2018 7 7 2/13/2019 6.5 7.6 10/15/2018 6.6 18.4 12/15/2018 2/14/2019 6.1 7 10/16/2018 6.3 18 12/16/2018 6.4 9.8 2/15/2019 6 7.8 10/17/2018 6.5 17.3 12/17/2018 6 9.7 2/16/2019 10/18/2018 6.5 16 12/18/2018 6.1 9 2/17/2019 10/19/2018 6.6 15.2 12/19/2018 6.3 9 2/18/2019 10/20/2018 12/20/2018 2/19/2019 6.5 7.4 10/21/2018 12/21/2018 2/20/2019 10/22/2018 7.1 13 12/22/2018 2/21/2019 10/23/2018 7.1 13.7 12/23/2018 2/22/2019 6.1 8.2 10/24/2018 7.1 13 12/24/2018 2/23/2019 10/25/2018 6.3 12.1 12/25/2018 2/24/2019 10/26/2018 7.2 11.9 12/26/2018 2/25/2019 6 7.4 10/27/2018 12/27/2018 2/26/2019 6.3 7.3 10/28/2018 12/28/2018 2/27/2019 6.3 7.6 10/29/2018 7.1 12.7 12/29/2018 2/28/2019 6.5 7.5 10/30/2018 7 12.1 12/30/2018 10/31/2018 7.1 12 12/31/2018 Month pH (S.U.) Temperature Month pH (S.U.) Temperature 3/1/2019 6 6.6 5/1/2019 6.1 14.6 3/2/2019 5/2/2019 6.5 15.1 3/3/2019 5/3/2019 7 15.6 3/4/2019 6.3 7.5 5/4/2019 3/5/2019 6.4 7.5 5/5/2019 3/6/2019 6.8 6.1 5/6/2019 6.3 14.6 3/7/2019 6.7 6.4 5/7/2019 6.3 15.1 3/8/2019 6.9 6.2 5/8/2019 6.7 15.8 3/9/2019 5/9/2019 6.2 16 3/10/2019 5/10/2019 6.5 16.3 3/11/2019 6.5 7.2 5/11/2019 3/12/2019 6.4 7.4 5/12/2019 3/13/2019 6.8 6.4 5/13/2019 6.5 14.9 3/14/2019 6.4 8.1 5/14/2019 6.4 14.9 3/15/2019 6 8.6 5/15/2019 6.2 15.4 3/16/2019 5/16/2019 6.5 15.1 3/17/2019 5/17/2019 6.5 15.3 3/18/2019 6.7 7.5 5/18/2019 3/19/2019 6.2 8.8 5/19/2019 3/20/2019 6.9 7.3 5/20/2019 6.5 16.6 3/21/2019 6.3 8.3 5/21/2019 6.5 16.8 3/22/2019 6 8.9 5/22/2019 7.1 16.5 3/23/2019 5/23/2019 6.8 17.9 3/24/2019 5/24/2019 6.9 18 3/25/2019 6.7 8.6 5/25/2019 3/26/2019 6.2 8.7 5/26/2019 3/27/2019 6.7 7.2 5/27/2019 3/28/2019 6.4 8.5 5/28/2019 6.5 18.2 3/29/2019 6.6 8.9 5/29/2019 7.1 18.9 3/30/2019 5/30/2019 7.1 19.4 3/31/2019 5/31/2019 7.1 19.2 4/1/2019 6.7 7.4 6/1/2019 4/2/2019 7.1 8.2 6/2/2019 4/3/2019 6.9 8.1 6/3/2019 4/4/2019 6.85 9.3 6/4/2019 4/5/2019 6.5 9.7 6/5/2019 4/6/2019 6/6/2019 4/7/2019 6/7/2019 4/8/2019 6.9 11.3 6/8/2019 4/9/2019 6.5 11.6 6/9/2019 4/10/2019 6.9 10.9 6/10/2019 4/11/2019 7.05 11.4 6/11/2019 4/12/2019 7.1 12.5 6/12/2019 4/13/2019 6/13/2019 4/14/2019 6/14/2019 4/15/2019 6/15/2019 4/16/2019 6/16/2019 4/17/2019 6/17/2019 4/18/2019 6/18/2019 4/19/2019 6/19/2019 4/20/2019 6/20/2019 4/21/2019 6/21/2019 4/22/2019 6/22/2019 4/23/2019 6.1 12.5 6/23/2019 4/24/2019 6.8 13.4 6/24/2019 4/25/2019 6.3 13.9 6/25/2019 4/26/2019 6.5 15.4 6/26/2019 4/27/2019 6/27/2019 4/28/2019 6/28/2019 4/29/2019 7.1 13 6/29/2019 4/30/2019 6.5 14.1 6/30/2019 Attachment 8 Rappahannock County High School Permit Number equal to VA0064181 Due Date between 2014-10-01 and 2019-08-01

Par Description Quantity Average Quantity Maximum Quantity Lim Average Quantity Lim Max Quc Description Concentration Min Concentration Average Concentration Max Concentration Lim Min Concentration Lim Avg Concentration Lim Max Cuc Description Excursions Monitoring Start Date Monitoring End Date

FLOW 0.003 0.008 0.005 NL MGD ********* ********* ********* 0 9/1/2014 9/30/2014 pH ********* ********* 6.2 7.2 6.0 ********* 9.0 SU 0 9/1/2014 9/30/2014 BOD5

9/30/2019 10:50:02 AM

Facility = Rappahannock County High School Chemical = Ammonia as N Chronic averaging period = 30 WLAa = 36.1 WLAc = Q.L. = 0.2 # samples/mo. = 1 # samples/wk. = 1

Summary of Statistics:

# observations = 1 Expected Value = 9 Variance = 29.16 C.V. = 0.6 97th percentile daily values = 21.9007 97th percentile 4 day average = 14.9741 97th percentile 30 day average= 10.8544 # < Q.L. = 0 Model used = BPJ Assumptions, type 2 data

No Limit is required for this material

The data are:

9

Page 1 Attachment 10 Attachment 10_TRC STATS

8/27/2019 3:06:00 PM

Facility = Rappahannock High School Chemical = TRC Chronic averaging period = 4 WLAa = 19 WLAc = Q.L. = 100 # samples/mo. = 30 # samples/wk. = 8

Summary of Statistics:

# observations = 1 Expected Value = 200 Variance = 14400 C.V. = 0.6 97th percentile daily values = 486.683 97th percentile 4 day average = 332.758 97th percentile 30 day average= 241.210 # < Q.L. = 0 Model used = BPJ Assumptions, type 2 data

A limit is needed based on Acute Toxicity Maximum Daily Limit = 19 Average Weekly limit = 11.3335966321422 Average Monthly LImit = 9.41680211348591

The data are:

200

Page 1 Attachment 11

Attachment 12

COMMONWEALTH of VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY NORTHERN REGIONAL OFFICE Molly Joseph Ward 13901 Crown Court, Woodbridge, Virginia 22193 David K. Paylor Secretary of Natural Resources (703) 583-3800 Fax (703) 583-3821 Director www.deq.virginia.gov Thomas A. Faha Regional Director

April 10, 2015

By e-mail ([email protected])

Dr. Donna Matthews, Superintendent Rappahannock County School Board 6 Schoolhouse Road Washington, VA 22747

Re: Approval of Reduction in E.Coli Monitoring at the Rappahannock County High School STP (VA0064181)

Dear Dr. Matthews:

Per your written request of March 30, 2015 the Rappahannock County High School STP may reduce E. Coli sampling from Outfall 001 to once per quarter, beginning the 3rd quarter of 2015.

Four (4) samples shall be collected one week apart during one month within each quarterly monitoring period. The results shall be reported as the geometric mean.

The quarterly monitoring periods shall be January through March, April through June, July through September and October through December. The Discharge Monitoring Reports (DMRs) shall be submitted no later than the 10th day of the month following the monitoring period. Please indicate on DMRs submitted for months in which E. coli does not occur that a reduction in monitoring has been granted and weekly monitoring for E. coli is not required.

Should any of the quarterly monitoring results for E. coli exceed 126 n/100mL, reported as the geometric mean, the monitoring frequency shall revert to once per week for the remainder of the permit term.

Dr. Donna Matthew, Superintendent Page 2 April 10, 2015

If you have any questions, please contact me at 703-583-3837 or [email protected].

Sincerely,

Anna T. Westernik Environmental Specialist Senior II

Cc: Pamela Parker, Rappahannock Water and Sewer Authority ([email protected]) Jim Swindler, Rappahannock County Schools ([email protected]) Lisa Janovosky, DEQ ([email protected]) Becky Vice, DEQ ([email protected])

Attachment 13 Public Notice – Environmental Permit

PURPOSE OF NOTICE: To seek public comment on a draft permit from the Department of Environmental Quality that will allow the release of treated sewage wastewater into a water body in Rappahannock County, Virginia.

PUBLIC COMMENT PERIOD: October 31, 2019 through December 2, 2019

PERMIT NAME: Virginia Pollutant Discharge Elimination System Permit – Wastewater issued by DEQ, under the authority of the State Water Control Board.

APPLICANT NAME, ADDRESS AND PERMIT NUMBER: Rappahannock County School Board, 6 School House Road, Washington, VA 22747. VA0064181.

NAME AND ADDRESS OF FACILITY: Rappahannock County High School STP, 12576 Lee Highway, Washington, VA 22747.

PROJECT DESCRIPTION: Rappahannock County School Board has applied for a reissuance of a permit for the public Rappahannock County High School Sewage Treatment Plant (STP). The applicant proposes to release treated sewage wastewaters from a high school, at a rate of 0.005 million gallons per day into a water body. Septage generated at this facility will be transported to a publicly owned treatment works for further treatment and final disposal. The facility proposes to release the treated sewage wastewater to an unnamed tributary of the Covington River in Rappahannock County, Virginia in the Rappahannock River watershed. A watershed is the land area drained by a river and its incoming streams. The permit will limit the following pollutants to amounts that protect water quality: pH, biochemical oxygen demand-5 day, total suspended solids, dissolved oxygen, ammonia as N, E. coli, and total residual chlorine. The permit requires monitoring without limitation for the following: flow, total Kjeldahl nitrogen, nitrate+nitrite as N, total nitrogen, and total phosphorus.

HOW TO COMMENT AND/OR REQUEST A PUBLIC HEARING: DEQ accepts comments and requests for public hearing by hand-delivery, e-mail or postal mail. All comments and requests must be in writing and be received by DEQ during the comment period. Submittals must include the names, mailing addresses and telephone numbers of the commenter/requester and of all persons represented by the commenter/requester. A request for public hearing must also include: 1) The reason why a public hearing is requested. 2) A brief, informal statement regarding the nature and extent of the interest of the requester or of those represented by the requester, including how and to what extent such interest would be directly and adversely affected by the permit. 3) Specific references, where possible, to terms and conditions of the permit with suggested revisions. A public hearing may be held, including another comment period, if public response is significant, based on individual requests for a public hearing, and there are substantial, disputed issues relevant to the permit.

CONTACT FOR PUBLIC COMMENTS, DOCUMENT REQUESTS AND ADDITIONAL INFORMATION: The public may review the draft permit and application at the DEQ-Northern Regional Office by appointment, or may request electronic copies of the draft permit and fact sheet. Name: Ann Zimmerman Address: DEQ-Northern Regional Office, 13901 Crown Court, Woodbridge, VA 22193 Phone: (703) 583-3805 E-mail: [email protected]