Lead and Copper Monitoring Plan
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Lead and Copper Monitoring Plan Prepared for MAWSS PWSID: AL0001005 May 2016 CH2M HILL Engineers, Inc. 25 W. Cedar Street Suite 560 Pensacola, FL 32502 Contents Section Page Acronyms and Abbreviations .............................................................................................................. v Introduction ................................................................................................................................... 1-1 1.1 System Information ......................................................................................................... 1-1 1.2 Water Quality Parameters ............................................................................................... 1-2 Sampling Procedures ...................................................................................................................... 2-1 2.1 Sampling Sites .................................................................................................................. 2-1 2.2 Sampling Procedures ....................................................................................................... 2-3 Action Level Exceedance Protocol ................................................................................................... 3-1 3.1 Public Education Procedures ........................................................................................... 3-1 3.2 Follow-up Monitoring Procedures ................................................................................... 3-2 3.3 Corrosion Control Plan Modifications .............................................................................. 3-2 3.4 Public Notifications .......................................................................................................... 3-2 3.5 Customer Notifications .................................................................................................... 3-3 Materials Inventory ........................................................................................................................ 4-1 4.1 Distribution System .......................................................................................................... 4-1 4.2 Service Laterals ................................................................................................................ 4-2 4.3 Private Plumbing Materials .............................................................................................. 4-3 4.4 Water Meters ................................................................................................................... 4-3 4.5 Future Material Inventory Program ................................................................................. 4-3 Appendixes A Chain of Custody B Sampling Protocol C Customer Sampling Results Notification D Lead Violation Notification E Copper Violation Notification Tables 1-1. System Contact Information 1-2. Water System Information 1-3. Laboratory Information 1-4. Water Quality Parameters 2-1. 2015 Sampling Sites 4-1. Water System Materials Inventory 4-2. Water Meter Inventory 4-3. Job Codes for Inventory Identification WT0520161134PNS III Acronyms and Abbreviations ADEM Alabama Department of Environmental Management AL Action Level d/b/a doing business as EPA Environmental Protection Agency GIS geographic information systems HDPE high-density polyethylene MAWSS Mobile Area Water and Sewer Systems MCLG maximum contaminant level goal MGD million gallons per day mg/L milligrams per liter ppb parts per billion ppm parts per million PVC polyvinyl chloride PWS Public Water System WTP Water Treatment Plant WT0520161134PNS V SECTION 1 Introduction This Lead and Copper Monitoring Plan has been prepared in accordance with the guidelines and regulatory requirements established by the Alabama Department of Environmental Management (ADEM) and includes the following topics: Monitoring Requirements and Sites Sample Collection Protocol Consumer Notification Violation Notification Requirements Materials Inventory The information compiled in this report is acquired from MAWSS staff’s knowledge of the water system and historical data. 1.1 System Information The Mobile Area Water and Sewer System (MAWSS) owns and operates the water treatment and distribution systems throughout the City of Mobile, Alabama and some surrounding areas in Mobile County. Wholesale water is provided to the City of Prichard and Spanish Fort. The water system is supplied by the J.B. Converse Reservoir located in the western portion of Mobile County. A maximum capacity of 60 million gallons per day (MGD) and 30-MGD are conveyed from the reservoir to the E.M. Stickney Water Treatment Plant (WTP) and H.E. Myers WTP, respectively. MAWSS also purchases potable water from the Saraland Water and Sewer Board and sells it to the University of Mobile and nearby areas known as College Woods. Table 1-1 provides information for contacting MAWSS. Table 1-2 provides general water system information and Table 1.3 provides contact information for the two private laboratories used by MAWSS for lead and copper analytical testing. Table 1-1. System Contact Information MAWSS Lead and Copper Monitoring Plan System Name Board of Water and Sewer Commissioners of the City of Mobile d/b/a Mobile Area Water and Sewer System PWS ID AL0001005 Contact Name and Title Charles Hyland, Jr., Executive Director Address MAWSS Park Forest Plaza 4725 Moffett Road Mobile, AL 36618-2236 Telephone (251) 694-3152 Email [email protected] WT0520161134PNS 1-1 SECTION 1 – INTRODUCTION Table 1-2. Water System Information MAWSS Lead and Copper Monitoring Plan Primary Water Source J.B. Converse Reservoir Water Treatment Facilities E.M. Stickney Filtration Plant (60 MGD) H.E. Myers Filtration Plant (30 MGD) Corrosion Control Stickney – Poly-orthophosphate (Carus 8500) Myers – Poly-orthophosphate (Carus 8500) Population Served Approximately 287,374 Number of Samples Required 50 MGD = million gallons per day Carus = Carus Chemical Corporation Table 1-3. Laboratory Information MAWSS Lead and Copper Monitoring Plan Laboratory Name Laboratory Contact Information Primary Testing Laboratory Envirochem Ken Mohr Director of Client Services 4320 Midmost Drive Mobile, AL 36609 251) 344-9106 Alternate Testing Laboratory TTL Darren Mitchell 3516 Greensboro Avenue Tuscaloosa, AL 35401 (205) 345-0816 1.2 Water Quality Parameters The water system is operated to provide a consistent and non-corrosive water to reduce lead and copper leaching. Table 1-4 provides the target water quality parameters. The lead and copper values are dictated by the U.S. Environmental Protection Agency (EPA) and are considered Action Levels (AL). The corrosion inhibitor, poly-orthophosphate, is supplied by Carus Chemical Corporation. The targeted dosing concentration is adjusted based on quarterly monitoring reports performed by MAWSS. During the quarterly monitoring, MAWSS collects samples from eight (8) different sites within the distribution system and at both water treatment plants in addition to exchange the test coupons located at these sites as well. MAWSS monitors pH, calcium (as CaCO3), alkalinity (as CaCO3), total dissolved solids, hardness (as CaCO3) iron, manganese, copper, lead, magnesium, conductivity, chloride, sulfate, orthophosphate, polyphosphate, and total phosphorus. 1-2 WT0520161134PNS SECTION 1 – INTRODUCTION Table 1-4. Water Quality Parameters MAWSS Lead and Copper Monitoring Plan Parameter Target/Action Level (AL) Poly-Orthophosphate 1.00 mg/L pH 7.5 Lead (AL) 0.015 mg/L Copper (AL) 1.30 mg/L mg/L = milligrams per liter WT0520161134PNS 1-3 SECTION 2 Sampling Procedures 2.1 Sampling Sites MAWSS is required, based on its classification as a large water system, to collect a minimum of 50 samples annually; however, additional samples typically are collected to provide a broader analysis area to ensure at least 50 samples are analyzed. These samples are collected from the distribution system between June 1st and September 30th for both lead and copper analysis. MAWSS has a comprehensive list of more than 250 residences that can be used as sampling sites and therefore have no issues with meeting the required number of samples. ADEM Administrative Code r.335-7-11.07 identifies Tier 1 sites as include single family structures containing lead pipe or plumbing, are served by a lead service line, or contain copper pipes with lead solder and were constructed after 1982. Lead services, including lead tubing from the main to the water meter, have never been encountered in the MAWSS distribution system and are believed to not exist therein. However, based on the age of the homes and the expectation that the homes were plumbed with copper and lead based solder, all of the sampling sites in MAWSS’ residence list are identified as Tier 1 sites. The last set of samples were collected between June 24 and July 10, 2015 from the list of sampling sites identified in Table 2-1. The next repeat monitoring samples will be collected between June 1 and September 30, 2016. MAWSS submits all samples analyzed for lead and copper to ADEM, including those exceeding the 50 required, and are included in the 90 percentile calculation identified in the Lead and Copper Rule. Table 2-1. 2015 Sampling Sites MAWSS Lead and Copper Monitoring Plan Sample Number Street Tier Year of Construction 1 2309 Hoppin Street 1 1985 2 6704 Keese Ct. 1 1985 3 6445 Trent Lane 1 1985 4 3713 Arrington Drive 1 1985 5 4200 Sedgewick 1 1986 6 5509 Outley Drive 1 1985 7 3164 Wellbourne Dr. W 1 1986 8 5362 Salmon Ct. 1 1985