Text

Requests Voluntary Participation by Publicly Owned Treatment Works (Potws),In Survey of Radionuclide Levels in Sewage Sludge & Ash by Completing Attached Questionnaire
	ML20211J478
Person / Time
Issue date:	06/21/1999
From:	Matt Thomas; NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
To:	; AFFILIATION NOT ASSIGNED
Shared Package
ML20211J467	List: ML20211J463; ML20211J478;
References
	NUDOCS 9909030154
	Download: ML20211J478 (57)
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{{#Wiki_filter:- n 1 pura ,po sr \\ UNITED STATES [Oh y ,j NUCLEAR REGULATORY COMMISSION g 5 't WASHMGTON D C. 20555-0001 0 \\ / UNITED STATES ENVIRONMENTAL PROTECTION AGENCY ' 50' WASHINGTON. D C. 29460 June 21, 1999

Dear POTW Operator:

The U.S. Nuclear Regulatory Commission (NRC) and the U.S. Environmental Protection Agency (EPA) are sponsoring a survey of radionuclide levels in sewage sludge and ash from publicly owned treatment works (POTWs). This survey consists of two parts - a questionnaire and sampling and analysis. We request your voluntary participation in this survey by completing and returning the enclosed questionnaire. During the sample and analysis part of the survey, samples will be collected voluntarily from several hundred POTWs nationwide and analyzed to determine the level of radionuclides. The overall objective of the survey is to determine if there are elevated levels of radioactive materials in sewage sludge / ash. We plan to use this information in assessing whether to apply further restrictions to the licensed e.nd unlicensed radioactive material that is being discharged j to the sewer system and whether to include radioactive materials in biosolids standards. The I range of survey results will be referenced in a joint NRC/ EPA guidance document for POTWs, which is currently under development. This survey information is not being collected for enforcement purposes by NRC or EPA. We recognize that some of the facilities being asked to. participate in this survey may have also participated in earlier federally sponsored surveys. Although they contained much useful information, these earlier surveys were more limited in scope and not adequate to determine the need for regulatory changes. NRC's and the Agreement State's regulations authorize certain amounts of radioactive material to be disposed of into the sanitary sewer system, in addition, other radioactive material enters the sewer system, from natural sources such as sediment, runoff, drinking water, and drinking water treatment residuals. Radioactive material that enters a POTW should be in an extremely diluted state, with an extremely low concentration. Consequently, none of this influent should pose a significant radiological risk. However, we have limited data from sites throughout the United States in the early to mid 1980's that suggests in certain cases some radioactive material can be reconcentrated in sewage sludge solids and ash. Therefore, measurable levels of some licensed and unlicensed (i.e., naturally-occurring) radioactive materials are expected to be found in the samples taken during this survey. The information from the questionnaire will be used to help determine if your facility will be chosen for sample analysis. The U.S. Department of Energy's Oak Ridge Institute for Science and Education (ORISE), under contract to NRC, and EPA's National Air and Radiation Environmental Laboratory (NAREL), will be analyzing the sewage sludge and ash samples. If celected for part two of the survey, ORISE will assign a confidential code to each POTW to ensure anonymity. The identity code for your facility will only be known to you and a few selected individuals at ORISE who will tightly control access to this information. We plan to 9909030154 990827 PDR ORG NOf'fA Oy v

a publish the results of the survey in a report without linking the POTWs with the indivijual sample analytical results. To make the information available in a timely fashion, we request that you complete the enclosed questionnaire and return it not later than 30 days after receipt. After receiving your completed questionnaire, including a list of zip codes for your collection system, we will provide you with a list of the licensees that have the ability to discharge to your facility's collection system, if your facility is chosen for sample analysis, we will provide you with a package with our sampling procedures, sample collection materials, and prepaid shipping container for submitting the samples to our survey labs. This questionnaire contains information collections that are subject to the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). These information collections were approved by the Office of Management and Budget, approval number 3150-01 9, w c exp res une 30,2001, 8 hi h i J The public reporting burden for this voluntary information collection is estimated to average 2 hours per response for the questionnaire,6 hours each for selected respondents for collecting samples, and 8 hours for each Agreement State; including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the information collection. Send comments on any aspect of this information collection, including suggestions for reducing the burden, to the Records Management Branch (T-6 E6), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by intemet electronic mail at BJS1 @NRC. GOV; and to the Desk Officer, Office of Information and Regulatory Affairs, NEOB-10202, (3150-0189), Office of Management and Budget, Washington, DC 20503. Public Protection Notification If a means used to impose an information collection does not display a currently valid OMB control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection. We appreciate your support in this important national survey project. We will send you the final report, which will be an NRC/ EPA joint report. If you have any questions about the survey, feel free to contact: Robert Bastian with EPA's Office of Wastewater Management at 202-260-7378 (INTERNET: Bastian.Bobert@epamail. epa. gov); Behram Shroff with EPA's Office of Radiation and Indoor Air at 202-564-9707 (INTERNET:Shroff.Behram@epamail. epa. gov); or me at 1-800-669-8744, ext. 6230 (INTERNET:mit1 @ nrc. gov). Sincerely, -~p ,,[ 'IIk em. Mary L. Thomas, Health Physicist Office of Nuclear Regulatory Research US Nuclear Regulatory Commission

Enclosure:

Sewage Sludge Ouestionnaire Joint AMSA/WEF Letter Joint NRC/ EPA Sewage Sludge Radiological Survey: Survey Design and Test Site Results l L

3. e. SEWAGE SLUDGE QUESTIONNAIRE

1. GENERALINSTRUCTIONS 1.1 Introduction The U.S. Nuclear Regulatory Commission (NRC) and the U.S. Environmental Protection Agency (EPA) request your participation in a joint national survey of the concentrations of radioactive material in sewage sludge (biosolids), ash, and related byproducts.

NRC regulations in 10 CFR 20.2003 currently permit licensee disposal of certain specific quantities of soluble or readily dispersible biological radioactive materialinto a sanitary sewer system. The EPA regulation that addresses the use or disposal of sewage sludge (40 CFR Part 503) currently does not address radionuclides. This survey will help determine the adequacy of the present 'm^ and EPA regulations addressing the discharge of radioactive material to the sanit -. $wer system. It will also respond to a recommendation from the General Accounting Ota + (GAO) to determine the extent to which radioactive contamination in sewage sludge, ash, and related byproducts is occurring (GAO report, " Actions Needed to Control Radioactive Contamination at Sewage Treatment Plants," May 1994). 1.2 When and Where to File Please return the completed questionnaire within 30 days of date of receipt to the address below: U.S. Nuclear Regulatory Commission Attn: Mary Thomas Mail Stop T-9C24 Washington, DC 20555 1.3 Reporting Period Please report information for the last 12 months or the last calendar year. 1,4 Further Information if you require assistance in completing this questionnairs, call Robert Bastian, EPA, at 202-260-7378, (email: bastian. robert @ eoa.aov) or Mary Thomas, NRC, at 1-800-368-5642-extension 6230 (email: mit1 @ nrc.oov). 1

.4 4O e a

2. GLOSSARY OF TERMS End-products are the materials that leave the treatment facility or are disposed of onsite after all processing is completed (e.g., ash from incineration, digested liquid or dewatered cake, dried pollets, compost).

Incineration is the combustion of matter in sewage sludge by high temperatures in an enclosed device. Land application is the application of sewage sludge to land to either condition the soil or fertilize crops or other vegetation. Monofills are landfills where only sewage sludge is disposed. Monofills include trenches and area fills. Municipalsolid waste landfillis a landfill that receives household waste, and that is not a land application unit, surface impoundment, injection well, or waste pile. Such a landfill may be publicly or privately owned. Sewage sludge is solid, semi-solid, or liquid residue generated during the treatment of domestic sewage in a treatment works. Sewage sludge includes, but is not limiied to: domestic septage; scum or solids removed in primary, secondary, or advanced wastewater treatment processes; and material derived from sewage sludge. Sowage sludge does not include ash generated during the incineration of sewage sludge or grit and screenings generated during preliminary treatment of domestic sewage in a treatment works. Sudace disposalis the placement of sewage sludge on an area of land for final disposal. It includes monofills, surface impoundments, lagoons, waste piles, and dedicated disposal sites. It does not include treatment and storage of sewage sludge, although placement on land for longer than 2 years is considered surface disposal unless the site owner / operator retains written records demonstrating that the operation constitutes a treatment or temporary storage

site, i

l Treatment works is either a Federally-owned, publicly-owned, or privately-owned device or system used to treat (including recycle and reclaim) either domestic sewage or'a combination of l domestic sewage and industrial waste of a liquid nature. Use or disposalincludes: land application of bulk sewage sludge, land application of sewage ( sludge sold or given away in a bag or other container, surface disposal, disposal in a municipal solid waste landfill unit, incineration, or any other use or disposal practice (e.g., vitnfication, use in asphalt or brick production, etc.). I 2 L

ri * \\ l.. l SECTION 1. TREATMENT WORKS IDENTIFICATION INFORMATION r ~ Malling Label Name of the treatment works and physicallocation (which may differ from the mailing address): l Mailing address of the treatment works (if different): i l Name, title, and telephone number of the person who should be contacted regarding information on this questionnaire: i i l Name, title, address, and telephone number of the person who should be sent the sample l collection _ package: l 3 L

.t .1 SECTION 11. GENERAL TREATMENT WORKS INFORMATION. 1. Indicate below the level (s) of wastewater treatment achieved by this treatment works. (Mark X for all that apply.) a. Primary treatment b. Secondary treatment c. Advanced treatment 2. Provide the annual average daily total flow rate for the last 12 months or the last calendar year (the total volume of wastewater treated by the treatment works in one year divided by 365). Use Gallons per Day (GPD) if your total daily flow rate is less than 10,000 GPD, oruse Million Gallons per Day (MGD), but not both. GPD p_r MGD (Circle one) over the last 12 months og last calendar year (circle one) 3. List the zip codes served by the collection system for 'this treatment works. This information is needed so NRC can identify licensees that can potentially discharge to your collection system. A list of these licensees will be sent to you in return for providing this information. I 4 L

s. 4. Identify the sewage sludge treatment process (es) used at your treatment works. (Mark X for all that apply.) a. Treatment works did not process sewage sludge in the last 12 months or the last calendar year. Explain; b. Thickening O Mechanical dewatering by c. (Please fill in process (es) used.) d. Heat treatment / wet air oxidation O Aerobic digestion e. f. O Anaerobic digestion g. Composting h. Lime stabilization (Class B) i. Alkaline Stabilization (Class A) j. Air drying beds k. Heat drying / Pelletizing 1. Sewage sludge treatment / storage lagoon (s) m. Sewage sludge storage bins or piles O incineration n. O other sewage studge treatment processes (Please specify.) o. 5

E 41 5. Check the boxes below to indicate the sewage sludge use or disposal practice employed at your facility or by others using/ disposing of your sewage sludge or ash. Also describe the product as one of the following: slurry, dewatered cake, compost, pellets, ash, effluent, grit, or other. Note if the product is stored onsite beforb ultima'tely being disposed offsite; and if the product is stored onsite, the time stored onsite, a. Land application. Product description: b. Surface disposal (permanent piles, lagoons, sludge or ash monofills). Product description: c. Disposalin municipal solid waste landfill. Product description: d. Transfer of your sewage sludge or ash to another facility for use or disposal. Product description: Identify the facility (type, location): e. Other use or disposal practice. Product description: Desenbe practice: 6. What are the primary sources of drinking water for your community? Check more than one,if applicable. O Municipai water supply from surface water source (s) a. b. Municipal water supply from groundwater well(s) c. Private wells d. Private water supply from surface wa'er source (s) 6

re. \\ 7. Does your wastewater collection system receive discharges of drinking water treatment residuals? O No Yes 8. Does your wastewater collection system include combined sanitary and storm water sewers? Yes No 9. Do you receive sludge from other wastewater treatment facilities for processing at your facility? Yes No 10. Do you receive septage for processing at your facility? i I l Yes No 11. What percentage of the annual average daily total flow rate (response to question 3) is industrial flow? Percent 12. Have you ever tested for radioactive materials in your sewage sludge? Yes No 13. Do you have more than one final sewage sludge production f acility location? Yes No 7

.( ^ amsa %*TMfa""* nt 1000 Connecticut Ave. NW, Suite 410, Wuhington, DC 20036 601 Wythe Street, Alexandria, VA 22314 June 1999

Dear Colleague:

Enclosed with this memorandum from the Association of Metropolitan Sewerage Agencies (AMSA) and the Water Environment Federation (WEF) is a questionnaire that is being sent to over 600 U. S. Pub.licly Owned Treatment Works (POTWs). The intent of the questionnaire, which was prepared for the Nuclear Regulatory Commission (NRC) and the U.S. Environmental Protection Agency (EPA) by the Sewage Subcommittee of the Interagency Steering Committee on Radiation Standards (ISCORS), is to provide a screening mechanisrn as a first step toward determining the extent and magnitude of radioactivity levels in selected municipal wastewater treatment facility residuals and incinerator ash. To assist you and your staff in understanding the issue of radioactivity in POTWs, a guidance document (" Characterization of Radioactivity Sources at Wastewater Treatment Facilities") was prepared by the AMSA-EPA-WEF National Biosolids Partnership (NBP) and sent to your Agency under separate cover prior to receipt of this questionnaire. Both AMSA and WEF endorse the gathering of information to provide documentation of background levels of radiation at POTWs and encourage you to participate fully by completing the NRC/ EPA survey form. We feel that the data gathered by this effort will provide a solid basis for the accurate interpretation of radioactivity levels in municipal wastewater collection and treatment. Sincerely, ASSOCIATION OF METROPOLITAN SEWERAGE AGENCIES / ( ~ \\- ; ~. Ken Kirk, Executive Director WATER ENVIRONMENT FEDERATION / uincalee Brown, Ph.D., Executive Director Enclosures

United States United States EPA 832-R-99 900 Environmental Protaction Nuclear Regulatory May 1999 Agency Commission GEPA Joint NRC/ EPA Sewage Sludge j (g...- Radiological Survey: Survey Design And Test Site Results i -: - - -. - - ~.... _ _ _ _ _.,, _ -[3

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E ,d Acknowledaments This report, which presents the results of radioisotope analyses of sewage sludge and ash samples from nine test sites as a trial test of the procedures planned for use in a survey of some 300 facilities across the country, was coordinated by the Sewage Subcommittee of the interagency Steering Committee on Radiation Standards (ISCORS). The document was based primarily upon the detailed laboratory results on the samples reported to the Subcommittee by the U.S. Environmental Protection Agency (EPA) National Air a Radiation Environmental Laboratory (NAREL) in Montgomery, Alabama, and the U.S. Nuclear Regulatory Cornmission (NRC) contract laboratory, the Oak Ridge Institute for Science & Education (ORISE) in Oak Ridge, Tennessee. Subcommittee members who participated in the planning and conduct of the nine test site survey effort and/or preparation of this report included (listed alphabetically): Lee Abramson, NRC/ Office of Nuclear Regulatory Research Kevin Aiello, Middlesex County Utilities Authority Jim Bachmaier, Department of Energy Bob Bastian, EPA / Office of Wastewater Management Dale Condra. ORISE Mark Doehnert, EPA / Office of Radiation and Indoor Air Dale Hcifmeyer EPA / Office of Radiation and Indoor Air Tony Huffed NRC/ Office of Nuclear Material Safety and Safeguards Tom Lenhart, Northeast Ohio Regional Sewer District Jill Lipoti, State of New Jersey. Roy Lovett, Department of Defense Tin Mo, NRC/ Office of Nuclear Regulatory Research Robert Neel, NRC/ Office of Nuclear Material Safety and Safeguards Bob Nelson, NP.C/ Office of Nuclear Material Safety and Safeguards Tom O'Brien, NRC/ Office of State Programs George Powers, NRC/ Office of Nuclear Regulatory Research Charleen Raddatz, NRC/ Office of the Executive Director for Operations Alan Rubin, EPA / Office of Science Technology Dave Saunders, EPA /NAREL Duane Schmidt, NRC/ Office of Nuclear Material Safety and Safeguards Loren Setlow, EPA / Office of Radiation and Indoor Air Behram Shroff, EPA / Office of Radiation and Indoor Air Phyllis Sobel, NRC/ Office of Nuclear Material Safety and Safeguards Scott Telofski, EPA /NAREL Mary Thomas, NRC/ Office of Nuclear Regulatory Research Mary Wisdom, EPA /NAREL Photo courtesy of Water Environment Federation, Alexandria, Virginia. L

.o. Table of Contents P_aQR .... 1 c A. Summary... B.' Background................... .2 C.. Survey Design.. .4 D. Questionnaire Results for the Test Sites .8 E. Sample Analysis Results for the Test Sites 8 F. References. .. 10 Appendices A. Sewage Sludge Questionnaire B. Radionuclides in Sewage Sludge and Ash at POTW Test Sites and Comparison With Other Sources of Radioactivity

o l DISCLAIMER This document resulted from interagency discussions. The Interagency Steering Committee on Radiation Standards Sewage Subcommittee is composed of representatives from the Environmental Protection Agency, Nuclear Regulatory Commission, Department of Energy, Department of Defense, State of New Jersey, the city of Cleveland and the county of Middlesex, New Jersey. This document has not been approved by the respective agencies and does not l represent the official position of any participating agency at this time. { JOINT NRC/ EPA SEWAGE SLUDGE RADIOLOGICAL SURVEY: SURVEY DESIGN AND TEST SITE RESULTS l A.SUMMXRY l l The U.S. Nuclear Regulatory Commission (NRC) and the U.S. Environmental Protection Agency l (EPA), through a subcommittee of the Interagency Steenng Committee on Radiation Standards (ISCORS), are sponsoring a joint survey to collect information concerning radioactive materials in sewage sludge and ash from sewage treatment plants (referred to in the industry as publicly l owned treatment works (POTWs)). Sanitary sewer disposal of radioactive material and sludge l reconcentration became an issue in the 1980s with the discovery of elevated levels of l radioactive materials in sewage sludge / incinerator ash at several POTWs. Although neither the NRC nor the Agreement States have seen further problems associated with POTW reconcentration of radioactive materials since NRC's regulations were revised in 1991, NRC and EPA are working together to conduct a survey of radioactive materials in sewage sludge and ( ash from POTWs. The objectives of this joint NRC/ EPA sewage sludge / ash survey are to: (1) obtain data on the levels of radioactive matenals in sludge and ash at POTWs from across the country; (2) l { estimate the extent to which radioactive contamination comes from either NRC/ State licensees or naturally-occurring radioactivity; and (3) support potential rulemaking decisions by NRC or EPA, if necessitated by the survey results. However, because of the design limitations, the survey alone may not be sufficient for rulemaking. ( The intent is that the names of the POTWs will not be associated with the analysis results in publicly available records and reports. The reason for the anonymous survey is to encourage j the cooperation of POTWs. However, if elevated levels of radioactive materials are detected I that are determined to be a potential health and safety concern, as determined by NRC, further investigation will be conducted to determine the appropriate course of action. The voluntary survey consists of two components - a questionnaire and a program to sample and analyze sewage sludge and incinerator ssh. Questionnaires will be sent to selected POTWs associated with NRC and Agreement State licensees that have the greatest potential to discharge radioactive materials in accordance with existing regulations and to POTWs in all 1 f

p. areas of the country, including areas of relatively high background radioactivity. Using the information from the questionnaires, NRC and EPA will identify approximately 300 POTWs to be sampled. It is expected that it will take several months for both agencies to analyze the results from the questionnaire and a year to complete the analysis of samples to be received from the POTWs. This report summarizes the results at nine POTW sites where the questionnaire methods and sampling and analytical procedures were tested. The survey was refined based on the experiences at the test cases and public comments on the survey. The results of the full survey will be published as a joint NRC/ EPA report for use by POTW operators, Federal agencies, States, and local officials. The sewage sludge / ash survey is being coordinated by a subcommittee of ISCORS, which was formed irs '.995 to coordinate resolution of interagency issues related to radiation protection. The ISCORS Sewage Subcommittee is assisting NRC and EPA in the development of the survey, including analysis procedures and the selection of facilities to sample. s The NRC contractors and EPA's National Air and Radiation Environmental Laboratory (NAREL) in Montgomery, Alabama, will analyze the sewage sludge and ash samples. These labs have also assisted ISCORS with the survey design. cor example, the labs collaborated to ensure that the analyticallaboratory procedures and quality assurance programs that both labs plan to use will produce consistent, accurate, and reliable laboratory measurements. NRC requested Office of Management and Budget (OMB) approval for this survey. Notices were published in the F_ederal Reaister on January 6,1997, and December 2,1997, to solicit public comments on the survey effort. This information request was approved by OMB (clearance number 3150-0189), with an expiration date of June 30,2001. B. BACKGROUND Federal Reculations Specific amounts and concentrations of radioactive material are legally authorized to be disposed into the sanitary sewage collection system by Federal and State regulations. In 1991, NRC revised its sewer disposal criteria, partially in response to evidence that certain radioactive matenals were reconcentrating in sewage sludge or incinerator ash. The revised NRC - regulations further limited the radioactive materials that NRC licensees are allowed to discharge to POTWs, which should preclude contamination at POTWs. The current NRC regulations in 10 CFR 20.2003 permit disposal of specific quantities of soluble materialinto a sanitary sewer. NRC plans to use the survey information in assessing whether to apply further restrictions to the licensed radioactive material that is being discharged to sanitary sewage collection systems. The EPA standard for the use and disposal of sewage sludge (biosolids) in 40 CFR Part 503 does not include limits for radioactive material. POTW operators have requested that EPA regulations address radioactive matenals so POTWs would have a basis to restnet discharges of radioactive materials to the sewage collection system. EPA plans to use the survey results to evaluate the need to include limits on radioactive materials in biosolids standards. 2

.e .~ Sources of Radioactive Materials One possible source of radioactive material entering a POTW involves naturally-occurring sources such as groundwater, which can contain elevated levels of radioactive materials in some parts of the U.S., as well as drinking water treatment residuals disposed of into the sanitary sewage collection system. Another possible source is the authorized disposal by users of radioactive materials (such as NRC and Agreement State licensees) of man-made radioactive materials into the sanitary sewage collection system. The removal of contaminants by various methods at POTWs, and the reduction of the volume of solids that contains these contaminants (e g. incineration of sludge), can cause reconcentration of radioactive materials in the treatment facility's sewage sludge or ash. Background information on the nature of radioactivity in sewage sludge can be found in reports published by NRC in 1992 and 1994 entitled " Evaluation of Exposure Pathways to Man From Disposal of Radioactive Materials into Sanitary Sewer Systems" (NUREG/CR-5814) and " Reconcentration of Radioactive Material Released to Sanitary Sewers in Accordance with 10 CFR 20"(NUREG/CR-6289), respectively. Another useful background document is a report entitled " Radioactivity of Municipal Sludge" issued by EPA during the development of the first round rulemaking of the 40 CFR Part 503 sewage sludge technical rule. Conaressional Interest This survey responds, in part, to a recommendation in the General Accounting Office (GAO) report, " Actions Needed to Control Radioactive Contamination at Sewage Treatment Plants " published in May 1994. The GAO report recommended that NRC determine the extent of elevated levels of radioactive matenals at POTWs and establish acceptable limits for radioactive materials in sewage sludge and ash. A joint House / Senate hearing was held in 1994 to officially release and address questions raised in the GAO report. The heanng was stimulated by concems associated with elevated levels of radioactive materials in incinerator ash at a major sewage treatment plant in the Cleveland, Ohio, area. The GAO stated that, over the past 20 years, NRC documented about a dozen situations where elevated levels of radioactive materials were identified in sewage sludge or sludge incinerator ash; but, there has been no national survey of radiation levels present in sewage sludge or sludge incinerator ash to determine if this is a widespread problem. At the time of the hearing, EPA was planning to conduct a second National Sewage Sludge Survey (NSSS) to support its efforts to develop the second round of the 40 CFR Part 503 sewage sludge technical regulations. EPA's planned survey would have included the collection of data on concentrations of radioactive materials in a representative sampling of POTW sludges from across the country. (The first national survey conducted in the late 1980s did not include analysis of radioactive material) Testimony presented by both NRC and EPA dunng the 1994 hearing noted that there was no indication of a widespread problem in this area and the Cleveland incident appeared to be an isolated incident. Based on limited information on radiation levels in sewage sludge and ash across the country, it appeared that reconcentration of radioactive materials may have been 3

h l t. associated with authorized insoluble industrial releases from both NRC and Agre licensees, which was documented and used as a basis of the GAO report. These occurred prior to the revision to NRC's regulations in 1991. Industry interest in 1996, the Association of Metropolitan Sewerage Agencies (AMSA) cond voluntary survey of concentrations of radioactive materials in some of its m sewage sludges and ashes. The objective was to develop a better estim of radioactive materials in sewage sludges and sludge incinerator ashes. Sa l wastewater plants in 17 States were supplied voluntarily and analyzed for rad These plants were distributed across the country and ranged in size from s largest POTWs. The most significant levels of radio the AMSA survey limited its usefulness in assessing regional background lev materials or the effects of licensees that dispose of radioactive material into sanita Current Plans EPA is not currently planning to move forward with a second NSSS. Ba OTW the limitations of the AMSA survey, NRC and EPA decided to jointly fund a s sewage sludges and ash to assess the potential need for NRC and/or E i survey information will also be referenced in a joint NRC/ EPA guidan which is currently under development by the ISCORS Sewage Subcommitte l t would provide information to help POTW operators determine sources o POTWs, descnbe sampling and analysis procedures, and advise whe to the presence of radioactive material in sludge. C. SURVEY DESIGN (1) obtain data on the The objectives of this joint NRC/ EPA sewage sludge / ash survey are to: levels of radioactive matenals in sludge and ash at POTWs from across th estimate the extent to which radioactive contamination com or naturally-occurring radioactivity, and (3) support potential rulemakin EPA, if necessitated by the survey results. However, because of the de( (1) it is a voluntary survey alone may not be sufficient for rulemaking. These limitations include survey, (2) a small number of samples are collecte f ilities with the greatest potential to discharge radionuclides and to POTWs in a concentrations of naturally-occurring radioactive m ti nwide. The survey consists of two components - a questionnaire and a pro sewage sludge and incinerator ash. Development of the Ouestionnaire 1 a

~d NRC and EPA developed a questionnaire (Appendix A) to request information from POTWs, such as their sludge treatment processes and disposal practices. The questionnaire also requests the zip codes for their collection systems so NRC can identify the licensees associated with each POTW. NRC will request from each Agreement State a list of licensees for the zip codes associated with each POTW. In 1996, the questionnaire was sent to nine test sites to assess the questions and to obtain a better basis for estimating the actual cost (burden hours) to the POTWs. POTWs That Were Selected to Receive the Questionnaire The survey was designed to measure radioactive materials in sewage sludge and ash at POTWs across the United States (the 50 States, the District of Columbia, and Puerto Rico). To maximize its effectiveness, the survey will focus on the POTWs associated with licensees with the greatest potential to discharge radioactive material to the sanitary sewer and POTWs in areas known to have high levels of naturally-occurring isotopes such as radium, thorium, and uranium. With these objectives in mind, the list of ?"OTWs to be sent the questionnaire was developed as follows: 1. Seiect POTWs associated with NRC and Agreement State licensees that have the greatest potential for discharge. NRC developed a list of licensees that have the greatest potential for discharge, and EPA established a list of POTWs associated with these licensees. 2. Select POTWs in areas known to have higher concentrations of NORM in ground and surface water. or that are associated with facilities that may potentially discharge NORM into the sewage collection system. 3. Include POTWs with incinerators because radioactive materials are expected to be at higher concentrations in ash than in sludge. There are about 180 POTWs with active incinerators. However, the number of POTWs with incinerators varies from State to State, and if all the incinerators are sampled, some States will include a disproportionately high number of samples. For these reasons, the survey plans to sample no more than a few POTWs with incinerators in each State. 4. Ensure that the POTWs on the list developed in Steps 1 and 2 are from all geographic areas of the United States (Coastal Plain. Appalachians, etc.) to reflect the regional differences in NORM. If the list developed in Steps 1 and 2 has only a few POTWs in any of the geographic areas, add POTWs from the 479 POTWs which responded to the questionnaire in the first EPA national survey, which was conducted in the late 1980's. The list of POTWs from the 1980's survey was chosen because it includes POTWs for various flow rates, percent industnal flow, and use and disposal practices and is a group of nationally representative POTWs. 5 Add POTWs requested by other ISCORS members and the States. 5 l 1

b l h l include a small group of POTWs with low potential for elevated radioactive 6.- materials for comparison purposes. l NRC and EPA will jointly send the questionnaire to about 600 POTWs. The Association of i Metropolitan Sewerage Agencies and the Water Environment Federation will provide a letter to be included with the questionnaire and will send a guidance document prepared by the National Biosolids Partnership (1999) and regulatory alert to the POTWs preceding the mailing of the l questionnaires to help introduce the POTWs to the voluntary survey effort and provide assistance in conducting radiation surveys of their treatment facilities and industrial contributors. The POTWs will be requested to voluntarily complete and return the completed questionnaires to NRC. NRC will then develop the list of licensees associated with each POTW from the zip codes in their collection system and assign each POTW to a geographic area. This information will be entered into an electronic database so that NRC and EPA can select the POT sampled.' NRC will send letters to the POTWs that returned the questionnaire with lists of licensees in their service area.. NRC will also develop a sample return tracking syst.;m to follow up on non-respondents. Selection of POTWs for Samolina and Analysis From the responses to the questionnaire, about 300 POTWs will be chosen for sampling and analysis. Based on the responses to the questionnaires, the PO1Ws will be assigned to the categories listed below. A number of POTWs will be sampled from each category The act number of samples to be taken from each category will be determined based on the responses to the questionnaire. It is the goal of this survey to obtain a representative number of POTWs from each category during the course of the survey. It is recognized that some factors, such as seasonahty. may need to be studied further. Type of NRC/ Agreement State licensees that could dispose into the sewage collection system

1. Academic

2. Medical 3 Manufactunng and Distnbution

4. Research and Development

5. Other licensees 6 No licensees that discharge to the sewage collection system Geographic area 1, Coastal Plain

2. Appalachians

3. North Central

4. Central

5. Rockies and Basin and Range

6. Colorado Plateau

7. Cahfornia b

-O ~

8. Pacific Northwest, Alaska, Hawaii Samole Collection and Analysis The sampling will take place over a one-year period. In areas of high NORM, sampling may be adjusted during some seasons, because there may be seasonal effects to the concentrations of NORM at POTWs.

Each month, over a one-year period. NRC and EPA willjointly send the NRC contractor a list of the POTWs to be sent letters and sample collection materials. The NRC contractor will contact the POTW operators to review the sampling instructions and then mail the letters and sample collection packages to the POTWs. Since POTWs routinely take representative sludge and ash samples to monitor potutants, the POTWs will use similar procedures to collect samples for this survey. The POTWs will return their samples to the NRC contractor who will assign a code to each POTN to ensure confidentiality. It is assumed that each POTW will, on average, send tt s.nnples of processed sludges and/or ashes, so the total number of samples collected from ali. OTWs participating in the survey will be about 600. It is expected that each laboratory will analyze about 300 samples. I The physical sampling and analysis procedure that will be used in this survey is described in the Quality Assurance Project Plan for this project. All analyses will be performed using methods typically used for environmental monitoring samples. All the samples will receive gamma spectroscopy, gross alpha, and gross beta analyses. The gross alpha and beta analyses are considered screening analyses. To use resources most efficiently, additionalisotope-specific analyses will only be performed on samples with the highest expected concentrations of the isotopes. Each month about ten percent of the samples (about 2 or 3 samples at each lab) will receive additional isotope-specific alpha or beta analysis; the action level for this additional analysis will be chosen based on the highest observed gross alpha and gross beta results from the survey samples analyzed that month. Additional isotope-specific analysis will be conducted for the following radioactive materials: beta emitters: strontium-89/90, carbon-14, hydrogen-3 (tntium) alpha emitters: radium-226, thonum-227/228/230/232, uranium-234/235/238, plutonium-238/239 Radium, thorium and uranium are naturally-occurring radioactive materials. Uranium and plutonium are also found in the effluents from processes in nuclear facilities that are used to produce nuclear fuel for research or power react 0rs. Strontium ic a medicalisotope. Plutonium will be analyzed only for POTWs with fuel-cycle or weapons research and development facilities in the collection system. Carbon-14 is both naturally occurring and man-made and is discharged by radiopharmaceutical and research facilities. Tritium is discharged by academic, manufacturing, and weapJns research and development facilities. During the survey, the laboratories will send the analysis results to the ISCORS Sewage 7

f. \\ 1 Subcommittee in individual monthly letter reports that discuss the samples analyzed that month and report any lab or field problems. The reviews of these monthly letter reports could lead to changes in the analysis procedures or in the selection of POTWs to be sampled. An NRC contractor will enter the sample analysis results into an electronic data base and analyze the results. The ISCORS Sewage Subcommittee has formed a working group to perform dose modeling studies to help evaluate the potential risks associated with the radioactive materials measured in the survey. At the conclusion of the sample analyses, the laboratories will report their results to the subcommittee in a final report. The ISCORS Sewage Subcommittee will prepare a final report on the survey results. D. QUESTIONNAIRE RESULTS FOR THE TEST SITES The questionnaire was sent to the nine test sites to obtain current site-specific information about the sludge treatment process and disposal practices of each facility. As a result of the experiences with the tests sites and public comments on the January 6,1997 Federal Reoister notice, minor changes were made to the questionnaire. Originally, it was estimated that it would take two hours to complete the questionnaire. For most of the test sites, the respondents took 20 minutes or less. Two respondents needed two hours because of the large number of zip codes in the collection system. The revised questionnaire is attached in Appendix A. f E. SAMPLE ANALYSIS RESULTS FOR THE TEST SITES Following the evaluation of the responses to the questionnaires, each test site was sent sample I collection packages to obtain sewage samples for analysis at the laboratories. Samples from the nine test POTWs were analyzed by both laboratories to ensure comparability, consistency in sample hand!!ng, and validity of analytical methods. To assist in the evaluation of sample collection procedures used in the survey, the laboratory staffs observed sample collection procedures at two of the test sites. Most test sites sent two sets of sludge or ash samples (one to each laboratory). A joint NAREL and NRC contractor report presents the findings of the radioanalytical results o various s'.va;;e sludge / ash matoces that were analyzed from the test sites. The report compared the analytical results between the laboratories and made recommendations for changes to be implemented before beginning the full survey. All the samples received gamma spectroscopy and gross alpha and beta analyses. For the test cases, all the samples also received additional isotope-specific alpha or beta analysis, although these analyses will only be performed on about ten percent of the samples in the full survey. For the test sites, both lab analyzed all the samples for all the radioactive materials for inter-lab comparisons. The results of the analysis of the test samples are discussed in Appendix B. The results from the test sites provide the beginning of the data base for the survey. By comparing each month's lab results (by radioactive isotope and for the gross alpha and gross 8

be's results) to the data collected to date, it should be possible to determine the higher concentrations of radioactive materials. As expected from other studies, the incinerator ash samples in the test sites contained higher concentrations of some radioachve materials than the non-ash samples, The following changes in the laboratory analysis resulted from the experiences with the test sites and recommendations from the laboratories: in general, the laboratories found good agreement between their gamma analyses. e Thus the final survey will not require that split samples be analyzed by both labs, as was done with the test survey. The gross alpha and gross beta analyses did not provide as good agreement, due to differences in calibration and/or analysis procedures at the labs. Although gross alpha and gross beta measurements are useful as gross screening tools, their accuracy should not be assumed to be better than about an order of magnitude. Therefore, the general magnitude of the results should be evaluated rather than detailed comparisons between individual measurements. For example, if every month, the top few samples were to be screened for further analysis using either gross alpha or gross beta results, the same samples would be selected using either laboratory's data. Although C-14 is naturally occurring, it is also man-made. and there are licensees (radiopharmaceutical and research facilities) that could potentially d% charge C-14 to sewage collection systems. r3ecause C-14 will not be detected readily by the sludge screening (gross beta) analyses, the screening analyses would not be useful for determining which samples to analyze for C-14. Instead, the association of a POTW with a facility that could discharge C-14 will be used to determine a limited number of samples to be analyzed for C-14. Both of the laboratories as well as the subcommittee recommended that tritium be e excluded from the analysis because totium does not reconcentrate due to its chemical behavior in sewage collection systems. However, since tntium was detected in several samples, the laboratories will analyze for tritium until the results indicate that this analysis can be discontinued Return time to the labs should be minimized for detection of short-lived nuclides, as well e as for sample preservation (avoidance of sample deterioration). The survey will continue to use overnight shipments of samples to the labs. The tumaround time at the POTWs was often not very good. This caused sample e batching problems for the labs, which in turn caused increased turnaround times and more analysis expense. Therefore, the sampling instructions and phone calls to the POTW, will emphastze the need for quick sampling and return. A turnaround time of no more than one week is needed for efficient laboratory operation. All samples will be analyzed using gross alpha, gross beta and gamma spectroscopy s e analytical tecnniques, ten percent of the samples will receive additionalisotopic-specific 9 J

G* w. alpha or beta analyses. F. REFERENCES C., Hill, R. L., Cantrell, K. J., Kaplan, D. I., Norton, R. L., Aaberg, R. L.,1994, . Ainsworth, C. " Reconcentration of Radioactive Material Released to Sanitary Sewers in Accordance with 10 CFR Part 20," NUREG/CR-6289, U.S Nuclear Regulatory Commission, Washington, D.C. 20555. EPA,'40 CFR Part.503, " Standards for the Use or Disposal of Sewage Studge " EPA,1986, " Radioactivity of Municipal Sludge." EPA,1989,POTW Sludge Sampling and Analysis Guidance Document." EPA /1990," Suggested Guidelines for the Disposal of Drinking Water Treatment Wastes Containing Naturally Occurring Radionuclides." EPA /NAREL and ORISE,1998," Report to the ISCORS Subcommittee on the Sewage Nuclide Concentration Test Samples," November 13,1998. EPA /NAREL, in preparation," Quality Assurance Project Plan, NRC/ EPA Sewage Sludge Survey." ' GAO,1994, Nuclear Regulation," Action Needed to Control Radioactive Contamination at Sewage Treatment Plants." Kennedy, Jr., W. E., Parkhurst, M. A., Aaoerg, R. L., Rhoads, K. C., Hill, R. L., Martin, J. B 1992. " Evaluation of Exposure Pathways to Man from Disposal of Radioactive Materials into Sanitary Sewer Systems," NUREG/CR-5814 U.S. Nuclear Regulatory Commission. Washington, D.C. 20555. National Biosolids Partnership,1999. Charactenstics of Radioactivity Sources at Wastewater Treatment Facilities: A Guidance Document for Pretreatment Coordinators. NRC,10 CFR Part 20, " Standards for Protection Against Radiation." Proposed . NRC, January 6,1997, Federal Register, Agency Information Collection Activities: Collection; Comment Request, page 771. NRC and EPA, May 29,1997, Draft Guidance of Radioactive Materials in Sewage Sl Publicly Owned Treatment Works (POTWs). NRC, December 2,1997l Federal Register, Agency Information Collection Activities: Submission for OMB Review; Comment Request, pages 63730-63731. 10 b

.I J APPENDIX A SEWAGE SLUDGE QUESTIONNAIRE i

1. GENERAL INSTRUCTIONS 1.1 Introduction The U.S. Nuclear Regulatory Commission (NRC) and the U.S. Environmental Protection Agency (EPA) request your participation in a joint national survey of the concentrations of radioactive materialin sewage sludge (biosolids), ash, and related byproducts.

NRC regulations in 10 CFR 20.2003 currently permit licensee disposal of certain specific quantities of soluble or readily dispersible biological radioactive material into a sanitary sewer system. The EPA regulation that addresses the use or disposal of sewage sludge (40 CFR Part 503) currently does not address radionuclides. This survey will help determine the adequacy of the present NRC and EPA regulations addressing the discharge of radioactive material to the sanitary sewer system. It will also respond to a recommendation from the General Accounting Office (GAO) to determine the extent to which radioactive contamination in sewage sludge, ash, and related byproducts is occurring (GAO report, " Actions Needed to Control Radioactive Contamination at Sewage Treatment Plants," May 1994). 1.2 When and Where to File Please return the completed questionnaire within 30 days of date of receipt to the address below: U.S. Nuclear Regulatory Commission Attn: Mary Thomas Mail Stop T-9C24 Washington, DC 20555 1.3 Reporting Period Please report information for the last 12 months or the last calendar year. 1.4 Further information if you require assistance in completing this questionnaire, call Robert Bastian, EPA, at 202-260-7378, (email: bastian robert @eoa aov) or Mary Thomas, NRC, at 1-800-368-5642-extension 6230 (email: mit1@nrc aov).

e

2. GLOSSARY OF TERMS End-products are the materials that leave the treatment facility or are disposed of onsite after all l processing is completed (e.g., ash from incineration, digested liquid or dewatered cake, dried pellets, compost).

Incineration is the combustion of matter in sewage sludge by high temperatures in an enclosed device. Land application is the application of sewage sludge to land to either condition the soil or fertilize crops or other vegetation. Monofills are landfills where only sewage sludge is disposed. Monofills include trenches and area fills. - Municipal solid waste landfillis a landfill that receives household waste, and that is not a land application unit, surface impoundment, injection well, or waste pile. Such a landfill may be publicly o privately owned. Sewage sludge is solid, semi-solid, or liquid residue generated dunng the treatment of domestic sewage in a treatment works. Sewage sludge includes, but is not limited to: domestic septage; scum or solids removed in primary, secondary, or advanced wastewater treatment processes: and material derived from sewage sludge. Sewage sludge does not include ash generated during the incint. ration of sewage sludge or grit and screenings generated during preliminary treatment of domestic sewage in a treatment works. Sudace disposalis the placement of sewage sludge on an area of land for final disposal. It includes monofills, surface impoundments, lagoons, waste piles, and dedicated disposal sites. It does not include treatment and storage of sewage sludge, although placement on land for longer than 2 years is considered surface disposal unless the site owner / operator retains written records demonstrating that the operation constitutes a treatment or temporary storage site. Treatment works is either a Federally-owned. publicly-owned, or pnvately-owned device or system used to treat (including recycle and reclaim) either domestic sewage or a combination of domestic sewage and industrial waste of a liquid nature. Lise or disposalincludes: land application of bulk sewage sludge, land application of sewage sludge sold or given away in a bag or other container, surface disposal, disposal in a municipal solid waste landfill unit, incineration, or any other use or disposal practice (e.g., vitrification, use in asphalt or brick production, etc.). i 2

?~ -4 SECTION 1. TREATMENT WORKS IDENTIFICATION INFORMATION Malling Label Name of the treatment works and physicallocation (which may differ from the mailing address): Mailing address of the treatment works (if different): Name, title, and telephone number of the person who should be contacted regarding information on this questionnaire: Name, title, address, and telephone number of the person who should be sent the sample collection package: 3

Fs \\ SECTION 11. GENERAL TREATMENT WORKS INFORMATION Indicate below the level (s) of wastewater treatment achieved by this treatme 1. (Mark X for all that apply.) Primary treatment a. 1 Secondary treatment b. Advanced treatment c. Provide the annual average daily total flow rate for the last 12 months or the calendar year (the total volume of wastewater treated by the treatment work 2. divided by 365). Use Gallons per Day (GPD) if your total daily flow rate is l 10,000 GPD, or use Million Gallons per Day (MGD), but not both. i GPD o_r MGD (Circle one) over the last 12 months ol ast calendar year (circle one) l List the zip codes cerved by the collection system for this treatment works information is needed so NRC can identify licensees that can potentially 3. i your collection system. A list of these licensees will be sent to yo this information. 4

.l 4. Identify the sewage sludge treatment process (es) used at your treatment works. (Mark X for all that apply.) a. Treatment works did not procers sewage sludge in the last 12 months or the last calendar year. Explain: b. Thickening c. Mechanical dewatering by (Please fil! in process (es) used.) d. O seat treatment / wet air oxidation O Aerobic digestion e. f. Anaerobic digestion g. Composting h. O time stabiiization (Ciass e) i. O Alkaline Stabilization (Class A) j. Air drying beds k. Heat drying / Pelletizing 1. Sewage sludge treatment / storage lagoon (s) m. Sewage sludge storage bins or piles 5

J n. Incineration 1 o. Other sewage sludge treatment processes (Please specify.) 5. Check the boxes below to indicate the sewage sludge use or disposal practice employed at your facility or by othes using/ disposing of your sewage sludge or ash. Also describe the product as one of the following: slurry, dewatered cake, compost, pellets, ash, effluent, grit, or other. Note if the product is stored onsite before ultimately being disposed offsite; and if the product is stored onsite, the time stored onsite, a. Land application. Product description: b. Surface disposal (permanent piles, lagoons, sludge or ash monofills). Product description: c. Disposal in municipal solid waste landfill. Product description: d. Transfer of "our sewage sludge or ash to another facility for use or disposal. Product description: Identify the facility (type, location): e. Other use or disposal practice. Product description: Desenbe practice: 6

-{ What are the primary sources of drinking water for your community? Check more than ] 6. one,if applicable. O uunicipal water supply from surface water source (s) a. b.' Municipal water supply from groundwater well(s) Private wells c. d. Private water supply from surface water source (s) Does your wastewater collection system receive discharges of drinking water treatment 7.' residuals? O No O yes Does your wastewater collection system include combined sanitary and storm water 8. sewers? O no O Yes Do you receive sludge from other wastewater treatment facilities for processing at your 9. facility? O no Yes ' 10. Do you receive septage for processing at your facihty? O Yes No 7

11. What percentage of the annual average daily total flow rate (response to question 3) is industrial flow? Percent 12. Have you ever tested for radioactive materials in your sewage sludge? O no O yes 13. Do you have more than one final sewage sludge production facility location? O no O Yes I 3 i

APPENDIX B Radionuclides In Sewage Sludge and Ash at POTW Test Sites and Comparison With Other Sources of Radioactivity The purpose of this Appendix is to compare published data on typical concentra radionuclides in soil, fertilizer, and building materials to the concentrations of radion found in the sludge and ash samples of a pilot study of nine Publicly Owned Tre (POTWs). The pilot study was conducted by a federal interagency working gro Steering Committee on Radiation Standards (ISCORS)) to develop sampling procedures for a nationwide survey of radionuclide concentrations in mun and incinerator ash, to be conducted in 1999. Over the last several decades, the U.S. Environmental Protection Agency (E surveys of sewage sludge, ash, compost, and the oth public or POTW workers are present. Recently, the U S. Nuclear Regulator (NRC), the U.S. Department of Energy (DOE), and the U.S. Department begun a collaborative effort with EPA to conduct materials in the sludge or ash. The results of this survey will be available in about 2 A pilot study of nine POTWs was conducted to assist the agencies in de the relative safety or hazard of radioactive materials rather to assess the sampling and analysis procedures. As such, no conclusio to the relevance of radioactive matenal concentrations detected in these samp document is intended to help put these raw data in perspective. SOURCES OF RADIATION EXPOSURE Radiation in the environment from natural sources is the major source of ra man. Radiation exposure results from the naturally-occurring radionuclides (terrestrial radiation) and direct cosmic (extra-terrestrial) radiation. Natu radionuclides are present in some plants and animals. In the human body, for radioactive potassium (K-40) is present in bones and soft tissues and is th occurring source of internal radiation exposure. Some sources of natural enhanced (concentrated) by human technological - made from naturally-occurring radioactive materials such as thorium in lanterni Together, this radiation is often referred to as " natural" or " backgr{ us and cannot be completely avoided. In addition j weapons testing in the past, also results in a relatively small source of r man.

Naturally-occurring radioactive materials are found in soil and water as well as in materials used to build our homes, such as bricks and stones. Geological formations and soils may contain isotopes of uranium, thorium, radium, radon, and other radioactive elements. The public is generally aware of the radioactive gas, radon (radon-222), which is one of the decay products of the uranium isotope uranium-238 that is found naturally in soil. Radon is often found in the air we breathe and the water we drink. Radon-222 and its decay products contribute most of the radiation exposure received by membem of the public. RADIOACTIVE MATERIALS IN SEWAGE SLUDGE, ASH AND OTHER PRODUCTS Sewage sludge and ash at POTWs may contain both naturally-occurring and man-made radioactive materials. Water that originates in or moves through geologic deposits containing naturally-occurring radionuclides could result in radioactivity being carried to the treatment facihty with storm water runoff or infiltration entering the sewer system, and water treatment plant residuals discharged to the sewer system. Industrial, medical or research facilities may also discharge radioactive materials to the sanitary sewer system in accordance with prescribed State and Federal regulations. In addition, radioactive materials administered to patients for the diagnosis or treatment of illnesses are excreted into the sewer system. Other industrial or residential discharges (such as fertilizer residues) can contain naturally-occurring radioactive materials that are not subject to licensing or regulation. Tables 1 and 2 provide the concentrations of radionuclides detected during the pilot survey of sludges and ash from nine POTWs, as well as typical ranges of radionuclide concentrations i commonly found in U.S. soils and common items such as fertilizers and building materials. The cune (Ci), or fractions of a curie (e g. picocurie), is the unit for expressing a quantity of radioactivity. The unit normally used to desenbe the concentrations of radioactivity in the environment is picocuries per gram (pCi/g). A picoeurie is one one-trillionth (1/1,000,000,000,000) of a curie. Radionuclide concentrations in these tables have been rounded to the nearest decimal point. Values in these tables do not show uncertainty calculations. Sludge and ash samples from POTWS associated with facilities known to discharge man-made radionuclides were included in the pilot survey. Inclusion in these tables does not imply that the range of radionuclide concentrations presented for the materials is prciective of human health. The ISCORS agencies make no representation as to human or environmental health and safety significance from exposure to radionuclides in the concentrations described in the tables. Further information may be obtained from Robert Bastian at EPA (emailbastian robert @eoa aov or phone 202-260-7378), Behram Shroff at EPA (emailschroff behram@eoa cov or phone 202-564-9707) or Mary Thomas at NRC (email mit1@nre aov or phone 301-415-6230). 2

I Table 1 Pilot Survey Concentration Ranges and Typical U.S. Background Concentrations of Radionuclides in Soil, Fertilizer, and Common Building Materials (All values are in pCi/g-dry weight) Radio. Soil' Phosphate Building Pilot Study Pilot Study nuclide Fertilizer 2 Materials ' Sludge Ash . Am-241 NDA2 NDA NDA ND' ND Ba-140 NDA NDA NDA ND ND Be-7

NDA NDA NDA ND - 22 4.0-13 Bi-212 0.1 - 3.5 0.1 - 4.6 0.1-3.7 ND - 2.0 ND - 2.0 Bi-214 0.1 - 3.8 4.0- 140 2.5 - 5.05 ND - 2.0

.02 -16 l C-14 ' NDA NDA NDA ND ND Co-60 NDA NDA NDA ND - 6.0 ND Cr 51 NDA NDA NDA ND - 4.0 ND Cs-137 0 1 - 0.28 NDA NDA ND - 1.0 0.03- 0.08 H-3' NDA NDA NDA ND - 135 ND l-125 NDA NDA NDA ND - 1.0 ND - 0.3 1-131 NDA NDA NDA ND - 70 ND - 4.0 K-40 ' 2.7-19 32-1607 0.8 - 30 2.0 - 8.0 14 - 16 Pa-234m ' O.1 - 3.8 4.0 - 140 0.2 - 5.05 ND - 15 ND - 9.0 l Pb-212 ~ 0.1 - 3.5 <0.1 - 4.6 0.1 - 3.7 0.2 - 2.0 1.0 - 2.0 Pb-214

0.1 - 3.8 4.0 - 140 0.2-50 ND-2.0 2.0-17 Pu-238 NDA NDA NDA ND - 0.03 ND - 0.01 Pu-239 NDA NDA NDA ND - 0.08 ND - 0.01 Ra-223 *

<0.1 - 0.2 0.2 - 6.6 <0.1 - 0.25 ND - 0.06 ND Ra-224 ' O.1 - 3.5 <0.1 - 4.6 0.1-3.7' ND - 1.0 0.5 - 4.0 Ra-226 ~ 0.1 - 3.8 0.1 - 24 0.1 - 3.5 1.0 -29 3 0-25 Ra-228

0.1 - 3.5

<0.1-4.6 0.1 - 3.7 ND - 2.0 2.0 - 9.0 3 _ _ _- _- _ -j

b, i Radio. Soil' ' Phosphate Building Pi!ot Study Pilot Study 8 Materials ' Sludge Ash nuclide Fertilizer Sr-89 NDA NDA NDA ND - 7.0 ND - 0.8 Sr-90 NDA NDA NDA ND - 0.7 ND Th-227 * <0.1 - 0.2 0.2 - 6.6 <0.1 - 0.2 N D - 0.1 ND Th-228 ' O.1 - 3.5 <0.1 - 4.6 0.1 - 3.7 NO - 1.0 ND - 2.0 Th-230 ' O.1 - 3.8 4.0 - 140 0.2 - 5.0 ND - 1.0 0.5 - 2.0 Th-232

0.1 - 3.5

<0.1 - 4.6 0.1 - 3.7 0.01 - 0.9 0.4 - 1.0 Th-234 ' O.1-3.8 4.0 - 140 0.2 - 5.0 ND - 12 2.0 - 5.0 TI-201 NDA NDA NDA ND - 24 ND TI-208

0.1 - 3.5

<0.1 - 4.6 0.1-3.7 ND - 0.5 ND - 0.6 U-234

0.1 - 3 8 4.0 - 140 0.2-5.0 0.2 - 44 5.0 - 8.0 U-235
8

<0.1 - 0.2 0.2 - 6.6 <0.1 - 0.2 ND-3.0 ND - 1.4 U-238 ~ 0.1-38 4.0 - 140 0.2 - 5.05 0.2 -12 2.0 - 5.0 NOTES: 1. R. Tykva and J. Sabol, " Low-Level Environmental Radioactivity - Sources and Evaluation? Technomic Publishing Company, Inc.. Lancaster, Pennsylvania (1995). This reference is the source of data for concentrations of radionuclides in soil and building matenals except for the concentrations of U-238, U-235, and Cs-137 which came from references 5 and 6, respectively. The concentrations of the daughters or decay products of U-238 such as Th-234 Ra-226, etc., those of U-235, such as Th-227 and Ra-223, and those of Th-232 are set equal to those of their respective parent radionuclides by assuming that the daughters are in secular radioactive equilibnum with the parent radionucfides. 2. Source for data on fertilizers: National Council on Radiation Protection and Measurements,1987, Radiation Exposure of the U.S. Population from Consumer Products and Miscellaneous Sources; NCRP Report No. 95, pp. 24-32. This is the source of data for the concentrations of radionuclides in fertilizers except for the concentration of K-40 in soil which came from the reference in note 7. 3. NDA - No data available ND - Not detected. The radionuclide was not detected in some of the samples during the 4. pilot study. For detection limits for radionuclides, see the tables in ' Report to the ISCORS Subcommittee on the Sewage Nuclide Concentration Test Samples," dated 4

November 23,1998. 5. M. Eisenbud and T. Gesell, " Environmental Radioactivity," Fourth Edition (1997), Academic Press, New York, New York. 6. Cs-137 concentration range in soil obtained from Figure 4-4, p. 94 of NCRP Report No. - 5_Q, " Environmental Radiation Measurements," Recommendations of the National Council on Radiation Protection and Measurements (1976). 7. Source for data on K 40 in fertilizer: S. Cohen and Associates,1997, Final Draft NORM Waste Characterization; EPA Contract No. 68D20155. WA No.5-09, pp. B-3-1 to B-3-24. 8. Values for U-235 in soil, fertilizer and building materials were based on the concentrations of U-238 in the same materials and the natural ratio of U-235 to U-238. 9. The symbol"<' which appears throughout the table is an abbreviation for the words "less than". 10. - naturally-occurring radionuclide 5

Table 2 - Pilot Survey Radionuclide Concentrations in Sewage Sludge and Ash (All values are in pCi/g-dry weight) NUCLIDE SEWAGE SLUDGE SAMPLE RESULTS ASH SAMPLE RESULTS ND,ND,ND,ND.ND,ND,ND,ND.ND ND,NO.ND.ND.ND,ND,ND, ND, ND, ND. ND. Am-241 ND.NO.NO ND.ND.ND.ND.ND.ND.ND ND.ND.NO.NO ND ND ND Ba-140 ND,ND,NO,NO.ND,ND,ND,ND,ND,ND,ND,ND ND,ND.ND.ND, ND, NO, ND. NO, NO.NO.NO ND.NO.ND.ND.ND.ND.ND.ND.ND.ND.ND.ND NO NO 3.2, 3 08, 216. 2 8. 2 21, 2 26,1.04. 0 72. 013. 0 i t. 0.16. ND,0.72. 0.47, 4 09. 12.7. 4 25. Be-7 ND. ND. 0 69. 0 42. 0.76. 0.76, 7.15. 8 73.1.30.1 13. 221, 219.18 5. 423.512,534 5 21 14 2. ND ND ND, ND, ND, 0 81. ND. ND. ND. ND. NO 018. ND 0 55 ND ND, ND. NO. 0.81. ND, NO. B9212 ND ND 0 37 ND 0 47. ND 0 50 ND 1 49 ND 0 76 ND 0 63 ND 0 56 124 ND t 54 Bs-214 0 68. 0 49. 0 47, 0 47, 1.12, 0 61. 0 25, 0 38 021,013.025.024.026. 3.15. 2.08. 3 12. ND.138. 0 40.169. 2 24. 0 45. 0 48. 0 92, 0 57.1.37 040 040. 025. 994.155.137 15 8 0 41 0 22 0 35 0 19 ND.ND,ND.ND.ND ND.NO,ND NO,NO.ND ND NO.ND ND.ND. ND.ND.NO ND. C-14 NO ND NDNDNDNONO NDNDNDNDNONDNO NO ND NO Co-60 ND. ~012. NO. ND ND. ND. ND NO. ND. NO. ND ND NO. ND 6 47, NO.ND.ND.NO. 5 07 ND ND ND ND ND NO NO ND NO ND NO NO NO ND NO ND ND ND.ND,ND.NO. ND,ND.ND.NO NO ND.ND.ND.ND.NO.ND.ND ND,ND ND.NO. Ct-51 ND ND ND ND ND 354 ND ND ND NO ND i 38 NO ND ND ND.ND

0. 30. 0 35. 0 07. ND. ND. 0 05. 0 06, NO. 0 03. 0 01. 0 03 0 02, 0 02, ND.

0 03. 0.08. 0 04 Cs-137 1 08 109. 0 02. 0 02. ND. ND. 0 06. 0 06. 0 20. 018. 0 05. 0 05. 0 08, 0 03, 0 05, 008. 0.04 0 05 002.002 ND.ND.NO.NO. ND. ND. ND. ND NO. NO 30 4. ND. 3 75. ND. ND. ND.169. ND. NO. H 3. NO. NO ND ND ND 125 0 NO NO ND ND ND 1 65 NO ND ND ND ND ND ND. ND, ND, 0 26. NO, ND. 0 91. ND NO. ND. ND. NO. ND, NO NO. ND. ND. NO, NO. NO, l-125 ND ND ND NO ND ND ND ND ND ND ND ND ND ND ND ND ND M31 605.698 049.047.049 049.138 14 2. ND NO. ND ND 747.137 0.16, 4 25. 0 16. 026.071.095 O % 374 385.028 0St. ND. NO. 9 25. 514, 5 $5. 4.18 ND. ND ND 2 59 NO NO 15 2 15 4, 15.14.2. 499 623.297.332,280.329.345 474.770.499 7.74.7.08.333. K-40 144.144.156 2 77, 2 22, 2 00. 7 36.7 87. 2 15, 2.54, 5 04. 5 52, 5 74. 5 51. 4 54, 4 76, 512 441 688 729 ND 9 47 ND. NO ND ND, 9 55. NO. 2 37,190.13 2.114, 11.1. 9 33. 852.402,621. 149.114 ND. ND. ND. ND. ND,136. NO. 2 64. ND. 319,1 17. 2 49. 2.44. ND ND. 3 37 Pa-23&n $$1 10 5 1.39. 0 91, 1 42. 018.0.27.057.074.059.056.025.031,025.018 056.063.025. 024. 022,028 051.060.023.035 049.055 155.153.068.075. 1 50,1.94.1 61, PD-212 1 85 080 065 052 055 042.047. 059 050 094.045.032.034.025.014 030.024 0 22, 340 223. 342, 11.1, 16 6.14 6. Pb-214 ND. 0 32. 0 29.176 2.35. 0 39. 0 43,100. 0 63.142. 0 44. 0 38. 0.19. 17 3 0 46 0 24 0 34 0 22 6

i 2 0.02, 001, ND, ND. ND, ND, ND, ND, ND, ND, ND, ND, ND, ND, ND, ND NO, ND, ND, 0.0, ND.ND.ND D NO. ND ND. ND. ND. ND. NO. 0 03. ND ND. ND. ND. ND Pu-238 08, NO,NO ND,ND, N D, ND, ND, ND, NO, ND. ND ND ND, ND, ND. ND, ND, 0 02. 0ND. ND. ND. N D ND. 0 01. ND N Pu-239

04. ND. ND. ND. ND. ND 004.007.001.

ND ND,ND,ND,ND, 0 D, ND, ND, ND, ND, ND. ND, ND. ND, ND. ND, ND. NO. ND ND, ND.ND ND D. ND. ND. ND. ND. 0 06 ND. ND. ND. ND ND. ND. ND ND Ra-223 N O NO, ND, 0 49, ND, ND. N O, ND, ND. ND, ND, ND, NO, ND, ND,. 0.19. ND, 0 70. ND, ND, N, 59 372. ND. 3 31 O. 0 43. ND. ND ND 0 49. ND 146. ND 0 62. ND. ND. ND 0 N Ra 224 0 101, 8.34. 2.92, 9 36. N 65, 6 19.1 46, 3 02, 2.36. 1 71, 5 11, 7.82,1 46, 1.13, 8 92. 1.8. 3 25. 16.7, 25 0,17.7 0.6. 29.2, 6.38, 3 61, 4 53, 2.13, 4 08.2.00. 2 55, 3 09. 3 42. 2.36, 4 251 i Ra-226 1 267.265.783.197 1 84. 1.58, 1 85, I 0 66. ND,1.05,1.23,0 61. 0 86, 0 74. 0 70. 0 37, 0 20. 0 7.81, 8 60. 8.20, 8 88 I Ra 228 140. 111 0 64 0 66 0.75. ND, ND, NO, f

17. ND.

j ND. ND, ND, ND, 7.12. ND, ND, ND. ND. ND. ND. ND, NO. ND,1. ND.NO.ND ND ND ND ND NO ND ND NO ND NO ND ND ND 0 56 ND,ND,NO.ND, Sr-89 7 0.74, ND.ND.ND.ND.NO,NO.ND ND.NO.NO.ND.ND.ND ND.05. NO NO NO NO ND NO ND ND ND NO ND ND ND NO ND ND ND ND,ND,ND,ND. Sr 90 ND ND. ND. NO. ND. 0 05, NO ND. ND. NO, ND. NO. ND. ND, ND, NO. NO.ND ND NO NO ND 0 07. ND ND ND 0 06 ND. 0 07 Th-227 alpha ND ND.ND ND O ND ND.NO.NO.NO. ND.ND.ND.ND.NO.ND.ND.NO.ND ND.ND.ND ND.ND,N. NO.ND ND NO ND ND NO NO Th-227 gamma ND NO ND ND ND ND NO ND 0 47. 1.30. ND,1.13 ND 0 80. 0 52,014, 0 62. 0 49. 0 50. 0 29 NO 0 48. 0 24 0 45. ND. 0 2 42. 2 04, 1.65. 1 44 Th-228 0 24. ND. 0 78. 0 54 236.099.217, 0 83 0 49 NO

33. 0.22, NO. 0 41, 016. 0 62. 0 57 0 58. 0 35. 0 32. 0 42. 0 23. 0 25. 0011. 019 0 074. 072, 0 55.

0 87 Th-230 a@na 024.016 040.029 029 099 060 030 043 ND NO ND.NO. D ND. ND.ND.NO.NO.NO.ND.ND ND.ND.ND.NO.ND,NO ND N, ND ND. ND NO ND NO NO ND ND NO Th-230 gamma ND ND ND ND ND 1.19. 0 66. 1 02, ND ND 0 18. 020. 026.011. 040.030.036.019.035. 035.018.023. 042.039 09 0 48, 0.71, 0.50. 0 27, 010. 015. 024 043 001.001.034 0 35 Th-232 0 27 9 5 03. 3.70, 5 08. 056 049 028 5 00. 5 43.139. NO.148. ND. 5 28 2 79.188. 0 83.12 5 119 237,242.417, 0 53 NO. 0 42 ND. O B6. 0 86.1 $8.100.129 218. t 25. N 2 09 Th-234 118.754 ND. NO. ND, ND. 1 09 10 6 ND. ND NO. ND. ND NO.14 0. ND, ND. ND. NO. ND NO.ND O ND,ND.ND.NO.NDND. 419 NO. 23 6 ND ND. ND NO. NO 21.5, ND. 5 51. ND TI-20$ ND. 0 29. ND, ND. 0 06. NO. rd. 0 26 NO 019. ND. 0 09. ND 0 06. ND. 0 20 ND.ND. 0 24 ND 8 0 65 ND 0 61 ND 01 0 05 ND 017 ND 011 ND 017 ND. 0 51 T1-208 5 16. 5.43, 5.78, 12.3. 15 4 144.695 021.081.098.098 132 118,493.262.122,1 61.1 36. 1.31,1 61. 2 00 7.34, 7.34.7 62 6 01 U-234 127.445,438.146.124.444 1 56 1 51 10 9 10 8 020,042,018. 0 55. 0 75. 0 01. 0 03, 0 19. 0 05. 0 35. 0.66. 0 16. 0 12.0 50. 0 43.0 58 0 07, 018. ND. 014 068.181.306.003.008.015. 008.009.009.013.013.017,0 24 U-235 a:pna

50. 0 64 0 32. 022. 0 34 021.009 049 057 041.048.004,007,056.052.0014. NO.

012, NO. ND,139 0 20. ND. NO. NO. NO ND 0 07. 015 0 05. ND. 010. ND. l U-235 gamma 187.204. NO.NO.ND ND. 050 046 l 7

10.3, 5 83,0.18. 0.75, 0.90, 0 85, 6 72, 6 23, 2.74, 1.46, 9.77, 9 62,12 5. 425,381,475, U-238 10 0, 11.5, 12.0, 0.74, 0.71, 0.95. 0.73.1.23, 1.15, 1.06, 1.21,1.33, 1.36. 3 26, 3 86, 3.33, 1 41, 1.13,8 63, 8.33 2.28 21.0.18 6, 5 0, 5.73,519, 8.78,13 4.19 0, 517, 7.55,18 5. D 9 23 7, 24 4, 46 5. 41.0, Gross Alpha' 19.5. 50 8, 48.9, 12.6, 11.7. 16 4. 22 6. 8 70. 13 6,14 9, 23 9 10 2. 12.7, 82.3. 97.9, 92.6, 72 9 105.107,198.285 Gross Beta' 30 8. 22 1,10 9, 8 58. 12.1, 9 36, 20 4. 15 5,13 8. 10 8, 29 8. 26.2, 35.3, 51 5, 28 6, 51.4, 21 3. 60 1, 34,8.19 0. 15 3, 16 8, 10 5, 17.1, 15 9, 22.5, 16 5. 19 0, 12.5, 776.654.954. 47.2 18 4 168.344.246 NOTES: 1, Gross alpha and Gross beta - These measurements are generally used as indicators of the presence of alpha and beta emitting radionuclides in a sample. Gross alpha and gross beta activity analyses are used to screen samples to determine the need for nuclide-specific analyses. They were included in the pilot study, but have no corresponding background levels, and thus are not included in Table 1. ND - Not detected. The nuclide was not detected in some of the samples during the pilot study. See the tables in the EPA National Air and Radiation Environmental Laboratory Report to the ISCORS Subcommittee on the Sewage Nuclide Concentration Test Samples," November 13, 1998, for detection limits for nuclides. 8

c ATTACHMENT 4 List of addressees for June 21,1999, letter (Attachment 2)

1- ~ C OF TUSCALOOSA WASTEWATER TREATMENT BIRMINGilAM WATER WORKS AND SEWER BOARD WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 2089 B A AL 3 283-0010 LS L OS ,35403 f\\ALNLT f 'ASTEWATER TREATMENT PLANT CIW O DECAR'R WA TEWATER TREATMENT PLANT Ek ATTN: PLANT MANAGER PO BOX 2232 O hL S ON AL 35045-0580 DECATUR AL 35602 CT F llUNTSVILLE WASTEWATER TREATMENT CITY OF EUFAULA WASTEWATER TREATMENT PLANT ^ ^ ^^ ATTN: PLANT MANAGER O. BOX 26 P O BOX 308 A A Al 36027 IlUNTSVILLE AL 35804-0308 CITY OF NORTil POLE WASTEWATER TREATMENT CITY OF llOMER WASTEWATER TREATMENT PLANT ,fPLANT MANAGER ATTN: MICilAEL G. IiODBS 3575 llEATil STREET P'O BOX 55109 liOMER AK 99603 7647 3 ORTH POLE AK 99705 CITY & BOROUGli OF JUNEAU CITY OF WRANGELL WASTEWATER TREATMENT PLANT ATTN: Arlen B. Clark ATFN: PLANT MnFAGER 155 SO. SEWARD STREET P.O. BOX 531 JUNEAU AK 99801 WRANGELL AK 99929 ORA ^ ^ ^ CITY OF FAIRBANKS WASTEWATER TREATMENT PLANT ,p N AN G R ATTN: PLANT MANAGER OPERATIONS DIVISION P.O. BOX 72215 325 EAST 94TH COURT FAIRBANKS AK 9910_/ ML !ORAGE AK 99515-2111 PIIOENIX 91ST AVENUE WASTEWATER TREATMEN I PLANT PIMA COUNTY WASTEWATER MANAGEMENT 91ST AVENUE WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 201 NORTII STONE AVE. 2301 WEST WASilINGTON ST. TUCSON AZ 85701 1207 PilOENIX AZ 850031611

2 CITY OF FLAGSTAFF CITY OF AVONDALE WASTEWA'TER TREATMENT PLANT ATTN: PLANT MANAGER RIO DE FLAG WRP ATTN: PLANT MANAGER AVONDALE AZ 85323-2817 2II W. ASPEN AVE. l. FLAGSTAFF AZ 86001-5359 i N \\ l OF N. LITTLE ROCK WASTEWATER TREATMENT CITY OF FORT SMITil WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 13 ORE T S M ET P.O. BOX 17898 FORT SWE AR 202 NORTil LITTLE ROCK AR 72117-0898 CITY OF LITTLE ROCK WASTEWATER TREATMENT CITY OF FORT SMITil WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 13 NORTH "P" STREET FORT SWE AR 501 L E ROC} AR 72202 CITY OF EL DORADO WASTEWATER TREATMENT STUTTGART MUNICIPAL WATERWORKS PLANTS ATTN: JAMES M KERR ATTN: PLANT MANAGER P.O. BOX 151 500 N WAStilNGTON STUTTGART AR 72160 P.O. BOX 1587 EL DORADO AR 71731 CENTRAL CONTRA COSTA WASTEWATER TREATMENT SAN MATEO WQCP ^ ATTN: ROGER A. HALL 1ARLES W BATTS 2050 DETROIT DRIVE 50 9 SAN MATEO CA 94404-1002 R Z A 94 3-4392 SAN FRANCISCO CITY & COUNTY VSFCD WASTEWATER TREATMENT FACILITY & ATTN: THOMAS J. FRANZA RECLAMATION DPW/BWPC ATTN: J. MICHAEL HOEllN SOUTHEAST WPCP 450 RYDFR. ST 750 PHELPS STREET VALLEJO CA 94590 SAN FRANCISCO CA 94124-2161 EAST BAY MUNICIPAL DIST WASTEWATER TREATMENT CITY OF PALO ALTO WASTEWATER TREATMENT PLANT PLANT ATTN: PLANT MANAGER SPECIAL DISTRICT NO.1 2501 EMBARCADERO WAY ATTN: JOE CARRASCO PALO ALTO CA 94303-3326 P.O. DOX 24055 OAKLAND CA 94623-1055 \\

~ -. - 'i I MARINA COUNTY WATER DISTRICT WASTEWATER SAN JOS$/SANTI CLARA WATER TREATMENT PLANT - POLLUTION CONTROL PLANT ATTN; PLANT MANAGER ATTN: DALEURKE 11 RESERVATION RD 700 LOS ESTEROS ROAD MARINA CA 93933-2001 SAN JOSE CA 95134-1099 1 CITY OF LOS ANGELFS WASTEWATER TREATMENT PLANTS L.A. COUNTY SANITATION DISTRICT JOINT WPCP ATTN: FRANK F,WADA ATTN: ROBERT HORVATli 222 N. SEPULVEDA BLV STE 1600 P.O BOX 4998 12000 VISTA DEL MAR l WillTTIER CA 90607-4992 PLAYA DEL REY CA 90245-4300 SIMI VALLEY COUNTY SANITATION DISTRICT WATER QUALITY CONTROL FACILITY CITY OF OXNARD WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 600 WEST LOS ANGELES AVENUE OXNARD CA 93033-9091 SIMIVALLEY CA 93065-1642 CITY OF DAVIS CITY OF THOUSAND OAKS ATTN: WASTEWATER TREATMENT PLANT illLL CANYON WASTEWATER TREATMENT PLANT SUPERINTENDENT - ATIN: PLANT MANAGER 23 RUSSELL BLVD. l 2100 T1100 SAND OAKS BLVD DAVIS CA 95616-3896 TilOUSAND OAKS CA 91362 2999 i SACRAMENTO REGION AL WASTEWATER TREAT l l CITY OF MODESTO FACILITY WATER QUALITY CONTROL FACILITY ATIN: CRAIG LEKVEN ATTN: PLANT MANAGER 8521 LAGUNA STATION RD. P.O. BOX 642 ELK GROVE CA 95758-9950 MODESTO CA 95353-0642 j l CITY OF CALEXICO STOCKTON REGIONAL WWCF ATIN: PLANT MANAGER ATTN: TIMOTHY ANDERSON 408 HEBER AVENUE 2500 NAVY DR. CALEXICO CA 92231 2892 STOCKTON CA 95206-1191 I .COACHELLA SANITARY DISTRICT ME O% A ER DEPT. ATTN: ALAN LANGWORTilY ATTN: TOM LEVY 600 B STREET P.O. BOX 1058 SUITE 500 1515 SIXT11 STREET COACHELLA CA 92236-1787 SAN DIEGO CA 92101-1033

'l l 1 j ORANGE COUNTY SANITATION DISTRICT #1 CIIINO BASIN MUNI WATER DISTRICT ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 8127 9400 CllERRY AVE. 10844 ELLIS AVE P.O. BOX 697 FOUNTAIN VALLEY CA 92708-7018 RANCilO CUCAMONGA CA 91729-0661 SOUT11 TAllOE PUBLIC UTILITY DISTRICT SAN BERNADINO WRF ATTN: PLANT MANAGER ATTN: PLAST MANAGER 1275 MEADOW CREST DR. 300 NORTH D STREET i SAN BERNARDINO CA 92418 SOUTH LAKE TAllOE CA 96150 CITY OF LIVERMORE WATER POLLUTION CONTROL RUNNING SPRINGS WATER DISTRICT ATTN: LYLE FERGUSON FACILITY ATTN: STEVE GITFINGS 31242 lilLLTOP BLVD. 1052 SOUTil LIVEREMORE AVE. P.O. BOX 2206 RUNNING SPRINGS CA 92382 LIVERMORE CA 94550 MADERA COUNTY MAINTENANCE DISTRICT No.22A STEAMBOAT SPRINGS WASTEWATER TREATMENT O AKilURST WASTE W ATER TREATMENT FACILITY GILBERT ANDERSON t CO NGINEERING DEPT. ^ STbAh B AT SPRINGS CO 80488 R 9 63 LEADVILLE WASTEWATER TREATMENT PLANT LA JUNTA WASTEETER TREATMENT PLANT A AMES BEREOD ATTN: GLENN PLEASANTS P.O. BOX 253 911 SOUTH HIGHWAY 24 'TA CO 81050 LEADVILLE CO 80461 FORT LUPTON WASTEWATER TREATMENT PLANT BRIGHTON WASTEWATER TREATMENT PLANT ATIN: ROBERT R. ALBERTS ATTN: EDWARD BURKE 130 SOUTH MCKINLEY 22 S.4TH AVENUE BEHM Q SM FOIkT PT N CO 80621 DURANGO WASTEWATER TREATMENT PLANT EATON WASTEWATER TREATMENT PLANT ATTN: GEORGE SPAEDT ATTN: ROGER MILLER 949 SECOND AVENUE 223 FIRST STREET DURANGO CO 81301-5109 EATON CO 80615

' AURORA WASTEWATER TREATMENT PLANT / SAND CRK 75Til ST WASTEWATER TREATMENT PLANT WW RECL l ATTN: PAUL IIEPPLER ATIN: PLANT MANAGER l 4049 75T11 ST SAND CREEK WASTEWATER RECLAIM FACILITY BOULDER CO 80301 11405 EAST 30Til AVENUE AURORA CO 80010 METRO WASTEWATER REC. FACILITY PUEBLO WASTEWATER TREATMENT PLANT ATTN: STEVE PEARLMAN ATTN: DON GARRISON 6450 YORK STREET 211 EAST D STREET DENVER CO 80229-7499 PUEBLO CO 81003 MONTROSE WASTEWATER TREATMENT PLANT GREELEY WASTEWATER TREATMENT PLANT ATTN: ALI.EN CORIELL ATTN: TilOMAS DINGEMAN P.O. BOX 790 300 E. 8Til STREET MONTROSE CO 81402 0790 GREELEY CO 80631 RIFLE WASTEWATER TREATMENT PLANT /NORTil WASTEWATER TREATMENT GUNNISON WASTEWATER TREATMENT PLANT ATTN: SHERWIN BARTO ATTN: BRET SPORE 202 RAILROAD AVE. P.O. BOX 239 P.O. BOX 1908 GUNNISON CO 81230 RIFLE CO 81650 DANBURY WPCP EAST liARTFORD WPCP (MDC) ATTN: PLANT MANAGER ATTN: PLANT MANAGER 155 DEERlilLL AVE P.O. BOX 800 DANBURY CT 06810 ilARTFORD CT 06101 i ENFIELD WATER POLLUTION CONTROL FACILITY FARMINGTON WATER POLLUTION CONTROL FACILITY ATTN: PLANT MANAGER ATTN: WILLIAM J. KAMINSKI 820 ENFIELD ST 1 MONTEITil DR ENFIELD CI 06082 ARMINGTON CT 06032-1053 MDC/IIARTFORD WPCP MA ITABASSETT DISTRICT COMM ATFN: PLANT MANAGER ATTN: PLANT MANAGER 240 BRAINARD RD. P.O. BOX 137 P.O. BOX 800 REGIONAL SEWER AUTilORITY llARTFORD CT 06142-0800 CROMWELL CT 06416

. NORTH HAVEN WATER POLLUTION CONTROL FACILITY . NEW LONDON SEWERAGE TREATMENT PLANT - ATTN: PLANT MANAGER ATTN: JAMES R. MCDERMOTT TOWN HALL ~ TOWN HALL MUNICIPAL BLDG 18 CHURCH ST. 181 CAPTAIN'S WALK NORTH HAVEN CT 06473 NEW LONDON CT 06320 VERNON WATER POLLUTION CONTROL FACILITY WATERBURY WATER POLLUTION CONTROL FACILITY AM GREG WEDEN TOW IALL 199 MUNICIPAL RD, - P.O. BOX 22 WAHMRY G 06708 VERNON CT 06066 S HA A POMON COMOL FACM NAUGATUCK WATER POLLUTION CONTROL FACILITY ^ ^ ^^ ATTN: PLANT MANAGER C L 500 CHERRY ST. NAUGATUCK CT 06770 S A EN CT 06516 CITY OF GROTON WATER POLLUTION CONTROL STAMFORD WPF ^ ATrN: JEANETTE SEMON P ANT MANAGER HARBOR VIEW AVE STAMFORD CT 06902 ROTO 06340 ^ ^ ^ ^ NEW CANAAN SEWERAGE TREATMENT PLANT ^ ^ ATrN: PLANT MANAGER SOUTH MAIN ST. FY NEW CANAAN CT 06840 SEAFORD DE 19973 KENT COUNTY LEVY COURT-WASTEWATER ~ CITY OF WILMINGTON WASTEWATER TREATMENT TREATMENT PLANT PLANT ATD PLANT MANAGER ATTN: PLANT MANAGER 414 FEDERAL STREET 800 FRENCH STREET DOVER DE 19901 WILMINGTONDE 19801 ) I DELAWARE CITY WASTEWATER TREATMENT PLAST A SOURCES MGEMEM DMSM NEW CASTLE COUNTY DEPARTMENT OF PUBLIC WORKS AM JAMES A. COWER . ATrN:PLANTMANAGER 2100 MARTIN LUTHER KING JR. AVE. SE 2701 CAPITOL TRL ASHWGW D.C. 20020 NEWARK DE 19711

~. ' ' MULBERRY SEWERAGE TREAThllT PLANT DEPT OF SEWERS-CITY HALL A'ITN: JACK R. GOODING ATTN: HOWARD F. CURREN ATWP 500 SECOND STREET NW 306 E JACKSON ST-6TH FLOOR ~ MULBERRY FL 33860 TAMPA FL 33602 ALLRED WASTEWATER TREATMENT FACILITY JAX BUCKMAN ST SEWERAGE TREATMENT PLANT #1 A'ITN: BOBBY TILLMAN ATTN: PLANT MANAGER P.O. BOX 186 JAX DEPT OF PUBLIC I)TILITY SR655 RECKER HWY 2221 BUCKMAN STREET . AUBURNDALE FL 33823 JACKSONVILLE FL 32206-3396 BARTOW WASTEWATER TREATMENT PLANT PLANT CITY WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER A1TN: STEVE SAFFELS 450 NORTH WILSON AVE. P.O. BOX C BARTOW FL' 33831 PLANT CITY FL 33564 FERNANDINA BEAGt MUNICIPAL SEWERAGE GAINESVILLE MAIN ST #2 TREATMENT PLA VT ATTN: CHEATHAM JOSEPH B. ATTN: NATHAN BOYD P.O. BOX 490 P.O. BOX 668 GAINESVILLE FL 32602 FERNANDINA Bl.ACH FL 32035-0668 A A -A ONDALE SEWERAGE MANEE STARKE-MUNICIPAL SEWERAGE TREATMENT PLANT ^ AA A PLANT MANAGER D C g'T RKEFL 32091 401 W GOVERNMENT ST PENSACOLA FL 32501 WINTER HAVEN-WAHNETA WASTEWATER TREATMENT MIAMI-DADE NO DIST WTF ATTN: PLANT MANAGER - PLANT ATTN: PLANT MANAGER 2575 N.E.151ST. STREET 4400 POI. LARD RD tiGRTH MIAMIFL 33133 WINTER HAVEN FL 33880 l 1 i LAKELAND GLENDALE WASTEWATER TREATMENT IRON BRIDGE RD SEWERAGE TREATMENT PLANT PLANT l l ATTN: CHARLES THOMPSON ATIN: PATRICK MURPHY 5100 L B MCLEOD RD 1825 GLENDALE STREET ORLANDO FL 32811 LAKELAND FL 33803 i +

o. PETE URG SOUTHWEST WASTEWATER SARASOTA. WHITAKER BAYOU A A AGER ATTN: DAVID SifULMISTER 175012TH STREET 1635 THIRD AVENUE NORTil SARASOTA FL 34236 ST. PETERSBURG FL 33713 MIAMI DADE SOUTil DISTRICT WASTEWATER JAMES B. MESSERLY WASTEWATER TREATMENT PLANT TREATMENT PLANT ATIN: PLANT MANAGER ATTN: ROBERT CULMER 605 MUNICIPAL BUILDING 4200 SALZEDO ST. AUGUSTA GA 30911 CORAL GABLES FL 33146 GAINESVILLE FLAT CREEK WPCP ALBANY JOSHUA STREET WPCP ATrN: STANLEY MlZE ATTN: B.J. llAYES P.O. BOX 2496 P.O. BOX 447 GAINESVILLE GA 30503 ALBANY GA 31702-0447 ATLANTA WPCPs DAWSON WPCP ATTN: PLANT MANAGER ATTN: PLANT MANAGER 121 MEMORIAL DRIVE P.O. BOX 190 ATLANTA GA 30335 DAWSON GA 31742 RM CLAYTON WPCP BUFORD WESTSIDE CS ATTN: LARRY NICHOLS/PlilLLIP G. LEWIS ATTN: EARLEY L. BIFFLE I' 95 SCOTT STREET

800 BUFORD GA 30518 ATLANTA GA 30335-0329 CORDELE WTCP SNAPFINGER CR SEWERAGE TREATMENT PLANT ATTN: CLARENCE PHEIL ATTN: JOHN M.SPOTTS P.O. BOX $69 1580 ROADHAVEN DRIVE CORDELh uA 31015 SlUNh MOUNi'AlN UA 30083 COBB CO WPCPs MACON-ROCKY CR WPCP ATTN: PLANT MANAGER ATTN: DON TI!OMPSON 680 SOUTH COBB DR.

P.O. BOX 108 MARIETTA GA 30060 MACON GA 31298

e t 9-MACON-ROCKY CR WPCP SANDY RUN WPCP ATTN: EARNEST MATilEWS ATTN: PAUL TICKERIIOOF 1400 PRESIDENT STREET P.O. BOX 1488 P.O. BOX 1027 WARNER ROBINS GA 31099-1488 SAVANNAllGA 31404 DECATUR CO-IND. AIRPACK WPCP IIAZLEllURST WASTEWATER TREATMENT PLANT ATIN:' MIKE MILLER ATT: MR. BLAN WILLIAMS P,0. BOX 735 P.O. BOX 512 BAINBRIDGE GA 31717 HAZLEHURSTGA 31539 AMERICUS MILL CRK SAND ISLAND WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 650 SOUTil KING ST. P O BOX 526 H HI 6813 AMERICUS GA 31709 CITY OF ABERDEEN WASTEWATER TREATMENT PLANT A A T i N GER ATIN: GERALD E.GIESBRECHT llILO WASTEWATER TREATMENT FACILITY. ^ ABE EEN D 83210 llILO 11196720-4245 OFSA M O M CITY OF BOISE WASTEWATER TREATMENT PLANT ATTN: JEFF ROY JORDINE j A1TN: PLANT MANAGER CITY IIALL l 790 LANDER STREET 110 MAIN STREET BOISEID 83703 SANDPOINTID 83864 ] FA M CITY OF IDAHO FALLS ^ ^ ^ AlTN: FRED H ROWE P.O. BOX 1907 ^ ^ DAl O AL SID 83405 TWIN FALLS ID 83303 CITY OF MOSCOW CITY OF POCATELLO ATTN: PLANT MANAGER ATTN: JON B HERRICK P.O. BOX 9203 122 E. FOURTH STREET A LL ID 83205-4169 MOSCOWID 83843 l 1 I* l

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W 'r l 1 . MUNDE'LEIN SE'WERAGE TREATMENT PLANT JOLIET EASTSIDE SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLAhT MANAGER 440 EAST llAWLEY STREET 150 WEST JEFFERSON STREET MUNDELEINIL 60060 JOLIETIL 60431 H A SEM MMG MWAIN WNE BATAVIA WASTEWATER TREATMENT FACILITY A AM ATrN: PLANT MANAGER ATTN: PLANT MANAGER 100 NORTilISLAND AVENUE fggNSDA O BATAVIA IL 60510 IL 60522-0179 MENDOTA SEWERAGE TREATMENT PLANT WEST CHICAGO SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER CITY llALL 475 MAIN STREET 607 STil AVENUE P.O. BOX 488 MENDOTA IL 61342 WEST CillCAGO IL 60186-0488 FREEPORT SEWERAGE TREATMENT PLANT MOKENA SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATrN: PLANT MANAGER 230 W. STEPHENSON STREET 11004 CARPENTER STREET FREEPORT!L 61032 MOKENA IL 60448 ITASCA SEWElv.GE TREATMENT PLANT CAROL STREAM SEWERAGE TREATMENT PLAhT l ATfN: PLANT MANAGER ATTN: PLANT MANAGER 100 NORTil WALNUT AVENUE 500 NORTil GARY AVENUE ITASCA IL 60143 CAROL STREAM IL 60188 GTOWN SEWM MMG l BARTLETT WASTEWATER TREATMENT PLANT AM PLAW MANAGER ATTN: PLANT MANAGER OA AW AVEWE 228 SOUTil MAIN STREET p ggy3 BA H. 60103 BLOOMINGTON IL 61702-3307 MWRDGC WASTEWATER TREATMENT PLANTS DEERFIELD WRF ATTN: RONALD A. NEUBAUER ATTN: PLANT MANAGER 100 EAST ERIE STREET 850 WAUKEGAN ROAD CillCAGOIL 60611 DEERFIELD!L 60015 l 0 l l l l

D o J FOX RIVER WRD SOUTil SEWERAGE TREATMENT PLANT DOWNERS GROVE SEWER Di.iTRICT WTC ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 92 2710 CURTISS STREET ELGIN IL 60121-0092 DOWNERS GROVE IL 60515 ELMl!URST WASTEWATER TREATMENT PLANT lilGilLAND SEWERAGE TREATMENT PLANT PUBLIC WORKS DEPARTMENT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 1115 BROADWAY 209 NORTTi YORK ROAD li!GIII.AND IL 62249 ELMIIURSTIL 60126 KEWANEE SEWERAGE TREATMENT PLANT LIBERTYVILLE SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 118 WEST COOK AVENUE 200 W. THIRD STREET LIBERTYVILLE IL 60048-1876 KEWANEEIL 61443 ^ ^ LOCKPORT SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER RU 1 LL RO. 222 EAST 9TH STREET P.O. BOX 750 LOCKPORTIL 60441 GURNEE IL 60031 ^ ^ OTTAWA SEWERAGE TREATMENT PLANT ^ ^ ^^ ATTN: PLANT MANAGER 7 T S ET 301 W. MADISON STREET P.O. BOX 299 OTTAWAIL 61350 PERUIL 61354 I f b^ ^ ^ ROSELLE SEWERAGE TREATMENT PLANT A ^^ f ATTN: PLANT MANAGER 474 CONGRESS CIRCLE NORTil 201 SOtITH ROIITE 83 ROSERE H. W 72 VILLA PARK IL 60181-0445 SPRING VALLEY WASTEWATER TREATMENT PLANT BOLINGBROOK SEWERAGE TREATMENT PLANT #1 ATTN: PLANT MANAGER ATTN: PLANT MANAGER 215 NORTH GREENWOOD STREET 375 WEST BRIARCLIFF ROAD SPRING VALLEY IL 61362 BOLINGBROOKIL 60440 i [.

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- JEFFERSON PARISil SEWERAGE TREATMENT PLANTS . CITY OF ABBEVILL5 WASTEWATER TREATMENT PLANT DEPT. OF PUBLIC UTILITIES ATTN: PLANT MANAGER ATTN: DENNIS P. BUTLER 101 NORTH STATE ST. P ABBEVILLE LA 70510 yEFF SON L 70181 JEFFERSON PARISil DEPARTMENT PUBLIC UTILITY ST. JOHN THE BAPTIST PARISil-SD #2L ATTN: PLANT MANAGER ATTN; PLANT MANAGER 1221 ELMWOOD PARK BLVD. 1800 W. ALINE HWY SUITE 803 LAPLACE LA 70068 HARAHAN LA 70!23 A A A A RMAWWMAM TALLULAH/ RICHMOND SEWERAGE TREATMENT PLANT ATTN: MICHAEL A GROVE ATTN: THOMAS J. MORELAND RFD #2 204 N CFDAR ST BOX 7 170 liOSPITAL ST. TALLULAll LA 71282 AUGUSTA ME 04330 SANFORD SEWERAGE DISTRICT BRUNSWICK SEWER DISTRICT ATTN: FRANCIS L. ANDERSON ATTN: PLANT MANAGER RIVER STREET WASTEWATER TREATMENT PLANT P.O. BOX 338 10 PINE TREE ROAD SPRINGVALE ME 04083-0338 BRUNSWICK ME 04011 SOUTH PORTLAND SEWERAGE TREATMENT PLANT #1 YARMOUTH WATER TREATMENT PLANT ATTN: MICHAEL A. CROSBY A1TN: EDWIN O. BERRY PO BOX 907 PO BOX 9422 YARMOUTH ME 04096 S. PORTLAND ME 04116 LEWISTON-AUBURN WATER POLLUTION CONTROL BANGOR WATER POLLUTION CONTROL FACILITY TER L. COENEN. "A IN ST N CANGORME 04401 LEWISTON ME 04240 C OFP TLAND-PEAKS ISL. WASTEWATER SCARBOROUGH WASTEWATER TREATMENT PLANT ATTN: Cl!ARLES J. ANDRESON ATTN: MIKE GREENE 415 BLACK POINT ROAD ISLAND AVE. AT WELCH ST. SCARBOROUGH ME 04074 PORTLAND ME 04104

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. ! FALL RIVER SCS & SEWERAGE TREATMENT PLANT SOUTliliADLEY WASTEWATER hREATMENT PLANT i ATTN: RONALD A. LARO A1TN: PLANT MANAGER ONE GOVERNMENT CENTER 10 INDUSTRIAL DRIVE i FALL RIVER MA 02720 SOUTli HADLEY MA 01075 SOUTH ESSEX SEWERAGE DISTRICT LYNN WASTEWATER TREATMENT FACILITY A1TN: PLANT MANAGER ATTN; PLANT MANAGER P.O. BOX 989 TWO CIRCLE AVE 50 FORT AVE - LYNN MA 01905 SALEM MA 01970 PLYMOUTil WASTEWATER TREATMENT PLANT MILFORD WASTEWATER TREATMENT FACILITY DEPARTMENT OF PUBLIC WORKS NITN: JOffN MAININI - ATTN: PLANT MANAGER P O BOX 644 11 LINCOLN STREET MILFORD MA 01757 PLYMOUTil MA 02360 LOWELL REGIONAL WASTEWATER UTILITY CONCORD WASTEWATER TREATMENT FACILITY ATTN: PLANT MANAGER ATTN: JAMES M. DRAPEAU FIRST ST BLVD 509 BEDFORD ST LOWELL MA 01850 CONCORD MA 01742 MEDFIELD WASTEWATER TREATMENT FACILITY NEW BEDFORD WATER TREATMENT PLANT A ER MARA ATTN: PLANT MANAGER. 99 BRIDGE ST FORT RODMAN 4 NEW BEDFORD MA 02740 MED ED 2052 BROCKTON WASTEWATER TREATMENT PLANT EAST HAMPTON WASTEWATER TREATMENT PLANT A1TN: TANZL SOSSIO A1TN: DAVID M. GAGNON 303 OAK HILL WAY l NORTHAMPTON STREET BROCKTON MA 0 01 EASTHAMPTON MA 01027 DARTMOUTH WATER POLLUTION CONTROL FACILITY SPRINGFIELD WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER . WATER AND SEWER COMMISSION 759 RUSSELL MILLS RD A1TN:. GEORGE A ROMANO SOUTH DARTMOUT11 MA 02748 SPRINGFIELD MA 01101-0995 i w

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O BEMkDJI WASTEWATER TREATMENT PLANT RED WING WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER CITY HALL 317 4TH ST NW P BEMIDJI MN 56601-3116 RED MN 55066 ROCHESTER WASTEWATER TREATMENT PLANT MWCC/MC-METROPOLITAN ATTN: PLANT MANAGER ATTN: BRYCE J. PICKART CITY llALL-ROOM 2 230 E. $TH STREET 2014TH STREET SE MEARS PARK CENTRE ) ROCl! ESTER MN $5904-3740 SAINT PAUL MN 55101 HIBBWG WAREWAHR MAWEMAW NEW ULM WASTEWATER TREATMENT PLANT A MI HAEL B. KEWA ATTN: PLANT MANAGER "A 100 N. BROADWAY fl CITY HALL NEW ULM MN 56073 B G AfN 5 46 GC/PASCAGOULA PUBLICLY OWNED TREATMENT WESTERN LAKE SSD S ATTN: OSEPH J. STEPUN PLANT MANAGER 2626 COURTLAND ST. 3103 FREDEMC ST. DULUTH MN 55806-1894 PASCAGOULA MS 39567 CORINTH WASTEWATER TREATMENT PLANT VICKSBURG PUBLICLY OWNED TREATMENT WORKS ATTN: BILLY D. GLOVER ATTN: PLANT MANAGER P.O. BOX 352 P.O. BOX 150 CORINTilMS 38834 VICKSBURG MS 39180 l HC/GULFPORT PUBLICLY OWNED TREATMENT WORKS BROOKHAVEN PUBLICLY OWNED TREATMENT WORKS ATTN: PLANT MANAGER ATTN: DAVID E. KENNEDY P.O. BOX 2409 P.O. BOX 560 GULFPORT MS 39501 BROOKHAVEN MS 39601-0560 J ACKSON PUBLICLY OWNED TREATMENT WORKS - SAVANNA STREET PICAYUNE PUBLICLY OWNED TREATMENT WORKS DEPARTMENT OF PUBLIC WORKS ATTN: PLANT MANAGER ATTN: PLANT MANAGER 203 GOODYEAR BLVD P.O. BOX 17 PICAYUNE MS 39466 JACKSON MS 39205-0017

. GC/ WEST JACKSON COUNTY PUBLICLY OWNED REPUBLIC WASTEWATER TREATMENT' PLANT TREATMENT WORKS ATTN:GRAIG LUSBY SEAMAN ROAD 213 N M ArrN: PLANT MANAGER REPUBLIC MO 65738 OCEAN SPRINGS MS 39564 ST JOSEPli WASTEWATER TREATMENT PLANTS KANSAS CITY WASTEWATER TREATMENT PLANTS PUBLIC WORKS & TRANSPORTATION DEPARTMENT WATER SERVICES DEPARTMENT ATTN: FOREST G. PARKER - ATTN: TERRY MCQUERRY 3500 759 filGIIWAY m E 12TH S'F 1ITH & FREDERICK AVENUE KANSAS CITY MO 64106 ST JOSEPH MO 64501 LEMAY TREATMENT PLANT SPRINGFIELD WASTEWATER TREATMENT PLANTS ST. LOUIS METRO PUBLIC WORKS ATTN: ROGER WIETING ATTN: PLANT MANAGER 201 IIOFFMEISTER AVENUE 840 BOONVILLE ST. LOUIS MO 63125 SPRINGFIELD MO 65806 CAPE GIRARDEAU ST. CHARLES PUBLICLY OWNED TREATMENT WORKS ATTN: DENNIS HALE ATTN: JOSEPli BUSCli 401 INDEPENDENCE ST. 200 N 2ND ST CAPE GIRARDEAU MO 63701 ST. CHARLES MO 63301 EFFERSON CIW PUBLICI.Y OWED MANEM CKC E PUBLICLY OWNED TREATMENT WORKS ^ "A ROBERT L. IiOPKINS JR 0 E. MCCARW ST. P.b. BOX 1019 111 E. MAPI 'd JEFFERSON CIW MO 65101 INDEPENDENCE MO 64051 COLUMBIA WASTEWATER TREATMENT PLANT JOPLIN PUBLIC WORKS DEPARTMENT. ATTN: TIM NYANDER ATrN: TERRY L. IIENNKENS TURKEY CREEK WASTEWATER TREATMENT PLANT P.O. BOX N PUBLIC WORKS CENTER ' 101 E. BROADWAY P.O. BOX 1355 1401 W. 2ND ST. COLUMBIA MO 65205 JOPLIN MO 64801 SULLIVAN WASTEWATER TREATMENT PLANT CITY OF HAMILTON WASTEWATER TREATMENT PLANT - ATTN: PLANT MANAGER ATTN: DICK KITTEL 210 WEST WASHINGTON 223 S. SECOND SULLIVAN MO 63080 HAMILTON MT 59840 -a

OF GREAT FAW WAmWAM MAWN CITY OF WHITEFISH WASTEWATER TREATMENT PLANT ^ ^' ' h A WAYNE ROBBINS p WillTEFISH MT 59937 REAT 'A L MT $9404 BUTTE-SILVER BOW WASTEWATER TREATMENT PLANT BILLINGS WASTEWATER TRE ATMENT PLANT ATFN: FREDERICK WENDT ATTN: DALE RONGIIOLT 800 CENTENNIAL AVENUE 2251 BELKNAP AVE. BUTTE MT $9701 BILLINGS MT $9101 MISSOULA WASTEWATER TREATMENT PLANT BOZEMAN WASTEWATER TREATMENT PLANT ATTN: STARR SULLIVAN ATTN: DON NOYES 435 RYMAN 2245 SPRINGillLL ROAD MISSOULA MT 59802 BOZEMAN MT 5?718 IIELENA WASTEWATER TREATMENT PLANT BURWELL WASTEWATER TREATMENT PLANT ATTN: MICHAEL J. GARRITi, ATTN: ROBERT D. BEAT 1708 CUSTER AVENUE EAST P 316 NORTH PARK AVE. BU EL E 68823 IIELENA MT 59601 OMAHA WASEWAHR MAMENAE 'l ABLE ROCK WASTEWATER TREATMENT PLANT A GEORE SWAR ATTN: DAVID POPE 5600 S 10TH ST A DOUGLAS CON NC m TBE OC NE 68447 OMAHA NE 68107 LINCOLN WASTEWATER TREATMENT PLANTS CITY OF LAS VEGAS WASTEWATER TREATMENT PLANT ATIN: GARY BRANDT ATTN: PLANT MANAGER 7000 N 70TH ST 400 EAST STEWART AVENUE LINCOLN NE 68507 LAS VEGA5 NV 89101-2942 L l TRUCKEE MEADOWS WRF CLARK COUNTY SANITATION DISTRICT AWT FAC. ATTN: PLANT MANAGHR ATTN: PLANT MANAGER 431 PRATER WAY 5857 EAST FLAMINGO ROAD SPARKS NV 89431 LAS VEGAS NV 89122 5598 1 i

. DERRY WASTEWATER TREATMENT PLANT liANOVER WASTEWATER TREATMENT FACILITY A AGER ATTN: PLANT MANAGER TOWN IIALL ^ ^ ^ l NOVE bH 03755 DERRY N1103038 MERRIMACK WASTEWATER TREATMENT FACILITY PORTSMOUTH-PIERCE ISLAND WASTEWATER ATTN: LARRY R. SPENCER TREATMENT PLANT P.O. BOX 235 ATTN: SUSAN DIAZ I 36 MAST ROAD DEPT. OF PUBLIC WORKS MERRIMACK Nil 03054-0235 PORTSMOUTli Nil 03801 DURilAM WASTEWATER TREATMENT FACILITY MANCIIESTER WASTEWATER TREATMENT PLAhT DEPT. OF PUBLIC WORKS ATTN: THOMAS COREY ATTN: PLANT MANAGER 300 WINSTON STREET 13-15 NEWMARKET ROAD MANCllESTER N1103103 6826 DURHAM NH 03824-2898 MILFORD WASTEWATER TPJATMENT FACILITY NEWINGTON WASTEWATER TREATMENT PLANT ATTN: MARIO LECLERC ATTN: PLANT MANAGER 1 UNION SQUARE SEWER COMMISSION MILFORD NH 03055 NEWINGTON NH 03801 B SEABROOK WASTEWATER TREATMENT FACILITY A ERO HE N ATTN: PLANT MANAGER MEHRHOF ROAD P.O. BOX 456 BOX 122 SEABROOK NH 03874 LOTLE FERRY NJ 07643 MIDDLESEX COUNTY UA WASTEWATER TREATMENT NEWTON WASTEWATER TREATMENT PLANT A A ^^ PLANT MANAGER 39 TRINITY STREET NEWWW 076@ VIL[.E NJ 08872-0086 S TOWN OF CLINTON WASTEWATER TREATMENT PLANT CAPE MAY CITY MUA REG WTF ATTN: PLANT MANAGER ATTN: DANIEL E. RIMANN 43 LEIGH STREET P.O. BOX 610 P CAPE MAY CT HOUSE NJ 08210 CLIN' TON J 08809

__...,__5 LAMBERTVILLE SEWAGE AUTHORITY PASSAIC VALLEY TREAT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER . P.O. BOX 300 600 WILSON AVENUE ' LAMBERTVILL E NJ 08530. NEWARK NJ 07105 PENNSVILLE SEWERAGE AUTilORITY RARITAN TOWNSHIP SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER ' 90 N. BROADWAY P.O. BOX 387. PENNSVILLENJ 08070 FLEMINGTON NJ 08822 l ATLANTIC COUNTY UTILITIES AUTH VERONA WTP ATTN: PLANT MANAGER ATTN: PLANT MANAGER 1701 ABSECON BLVD - 600 Bl.OOMFIELD AVENUE ATLANTIC CITY NJ 08401 VERONA NJ 07044 LIVINGSTON TWP SEWERAGE TREATMENT PLANT RAHWAY VALLEY SEWERAGE AUTH . ATTN: PLANT MANAGER ATTN: RICHARD P.TOKARSKI 357 SOUTH LIVINGSTON AVENUE 1050 EAST HAZELWOOD AVENUE LIVINGSTON NJ 07039 RAHWAY NJ 07065 l CUMBERLAND COUNTY UA WASTEWATER TREATMENT GLOUCESTER CO UTIL AUTH WASTEWATER PLANT TREATMENT PLANT ATTN: BLAKE G. MALONEY A1TN: PLANT MANAGER 333 WATER STREET P.O. BOX 340 BRIDGETON NJ 08302 THOROFARE NJ 08086 MONMOUTH CO BAYSHORE OUTFALL BAYSHORE REGIONAL SA A PWMNAGER ATTN: PLANT MANAGER ^ HARBO WAV ^" BELFORD NJ 07718 JT. MEET TREATMENT PLANT NORTHWEST BERGEN COUNTY UA ATTN: JOSEPH BONACCORSO ATTN: PLANT MANAGER 500 S. FIRST S11tEET. P.O. BOX 255 ELIZABETH NJ 07202 ' WALDWICK NJ 07463

~.~ 26 - ^ ^ SOMERSET RARITAN VALLEY SA GARYO ATTN:'JEANNE C. DECKER P.O. BOX 4118 RIDGE R NJ 08807'-0400 OM WOOD AVE. LINDEN NJ 07036-8118 PARSIPPANY TROY lilLLS WASTEWATER TREATMENT TOWN OF MORRISTOWN WASTEWATER TREATMENT PLANT PLANT ATTN: GEORGE R.YNKIEWICZ ATTN: PLANT MANAGER 1001 PARSIPPANY BLVD 110 SOUTli STREET PARSIPPANY NJ 07054 MORRISTOWN NJ 07960 CAMDEN COUNTY M.U.A. IIAMILTON TOWNSillP WATER POLLUTION CONTROL ATIN: PLANT MANAGER FACILITY 1645 FERRY AVENUE ATTN: PLANT MANAGER P.O. BOX 1432 300 If0BSON AVENUE CAMDEN NJ 081011432 TRENTON NJ 08610 STONY BROOK RSA LANDIS SEWERAGE AUTliORITY ATTN: TilOMAS C. ANDERSON ATTN: DENNIS W. PALMER 290 RIVER ROAD 1776 SOUTil MILL RD. PRINCETON NJ 08540 VINELAND NJ 08360 CITY OF GALLUP WASTEWATER TREAT 51ENT PLANT CITY OF TUCUMCARI WASTEWATER TREATMENT PLANT ATIN: ' ALBERT N. JACKSON ATTN: PLANT MANAGER P.O. BOX 1270 P.O. BOX 1188 GALLUPNM 87301 TUCUMCARINM 88401 ALBUQUERQUE PUBLIC WORKS DEPARTMENT. CITY OF SANTA FE WASTEWATER TREATMENT PLANT ATTN: MARK MILLER ATTN: PLANT MANAGER 4201 SECOND STREET S.W. P.O. BOX 909 ALBUQUERQUENM 87105 SANI A Fh NM 87$01 4 CITY OF LAS CRUCES WWAATAP SCliENECTADY WPCP ATTN: PLANT MANAGER ATTN: PAUL J. LAFOND P.O. DRAWER CLC 300 ANTHONY STREET LAS CRUCES NM 88004 SCliENECTADY NY 12308 I l

AUBURN SEWERAGE TREATMENT PLANT ERIE COUNTY SD WASTEWATER TPJEATMENT PLANT ATTN: PLANT MANAGER ATIN: PLANT MANAGER 35 BRADLEY STREET 260 LEHIGli AVENUE AUBURN NY 13021 LACKAWANNA NY 14218 ) LITTLE FALLS WASTEWATER TREATMENT PLANT BINGilAMTON.JOIINSON CITY JNT BD ATTN: PLANT MANAGER ATTN: PLANT MANAGER RIVER ROAD EAST OLD VESTAL ROAD LITTLE FALLS NY 13365 VESTAL NY 13850 WATERTOWN WPCP NYC BUREAU OF WW POLLUTION CONTROL ATTN: PLANT MANAGER ATTN: ROBERT E. ADAMSKY 700 WM. T. FIELD DRIVE 96-05 IlORACE HARDING EXPRSSWAY WATERTOWN NY 13601 CORONA NY I1368 1 ORE TONAWAWA WASEWAHR MAMEM POUGHKEEPSIE WPCP P ATTN; PLANT MANAGER ' PLANT MANAGER 206 NORTil WATER ST POUGHKEEPSIE NY 12601 OR ITONA ANDA NY 14120 NIAGARA FALLS WASTEWATER TREATMENT PLANT TONAWANDA SD#2 SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATrN: PLANT MANAGER 1200 BUFFALO AVE. 750 TWO MILE CREEK ROAD NIAGARA FALLS NY 14302 TONAWANDA NY 14150 NASSAU CO SD#1 -INWOOD SEWERAGE TREATMENT NCSD#2 PLANT BAY PARK SEWERAGE TREATMENT PLANT AlTN: CONSTANTINE SPARACIO ATTN: RICilAFD COTUGNO 1 WEST STREET FOOT OF FOURTil AVE MINEOLA NY 11501 EAST ROCKAWAY NY 11518 GLEN COVE WTP ITHACA AREA WWT FACILITIES ATTN: WILLIAM C. GRAF ATTN: PLANT MANAGER 100 MORRIS AVENUE 525 THIRD STREET GLEN COVE NY l1542 ITHACA h"( 14850

\\ i, YONKERS JOINT WASTEWATER TREATMENT PLANT MAMARONECK SANITARY SD WASTEWATER ATIN: THOMAS J. LAURO TREATMENT PLANT FERNBROOK ST ATTN: PLANT MANAGER LUDLOW DOCK SOUT WEST BOSTON POST ROAD NEW ROCllELLE NY 10801 MAMARONECK NY 10543 PORT WASIIINGTON WPCP NCSD#3 CEDAR CREEK WPCP ATFN: ROBERT W. VOGT ATTN: DAVID B. FLAUMENBAUM P.O. BOX 790 0B 70 HARBOR ROAD 3 PORT WASli[NGTON NY 11050 hlETROPOLITAN SYRACUSE SEWERAGE TREATMENT ALBANY CO SD WASTEWATER TREATMENT PLANTS ^ RANDY R. OTT OX 8 650 HIAWATHA BLVD ALBANY NY 12204 W. SYRACUSE NY 13204-1194 LEWISTON MASTER S 1.A. WASTEWATER TREATMENT ENDICOTT WPCP ATTN: EUGENE A. KUDGUS PLANT MANAGER 1009 EAST MAIN STREET 501 PLETCilER ROAD ENDICOTTNY 13760 LEWISTON NY 14092 N ACARA COUNTY SD#1 WASTEWATER TRF'" MENT SMTOGA CO SD# 1 WASTEWATER TREATMENT PLANT A DONAW J. RUDOLPH ATTN: PLANT MANAGER 0 7346 LIBERTY DRIVE 9EC1 N 'ILLE NY 12188 NIAGARA FALLS NY 14304 FRANK E VAN LARE SEWERAGE TREATMENT PLANT BIRD ISLAND WASTEWATER TREATMENT PLA NT ATTN: PLANT MANAGER ATTN: PLANT MAiMGER 700 PINEGROVE AVENUE FOOT OF WEST FERRY ST. ROCHESTER NY 14617 BUFFALO NY 14213-1799 GLENS FALLS WASTEWATER TREATMENT PLANT OSWEGO SEWERAGE TREATMENT PLANTS ATTN: LAWRENCE J. GLASHEEN ATIN: PLANT MANGER 2 SHERMANTOWN ROAD IST & W. SCHUYLER ST. GLENS FALLS NY 12801 OSWEGO NY 13126 I l

6. ROME MUNICIPAL SEWERAGE TREATMENT PLANT ERIE CO/SOUTIITOWNS SEW TRT FAC ATTN: PLANT MANAGER ATTN: PLANT MANAGER 7120 EAST DOMINICK STREET 3690 LAKESilORE ROAD ROME NY 13440 BUFFALO NY 14219 I E k KILL SANITARY SD WASTEWATER TREATMENT SUFFOLK COUNTY SD#3-SOUTilWEST ATTN: PLANT MANAGER ATTN: PLANT MANAGER 600 BERGEN AVEWE 700 HIGHLAND AVENUE WEST BABYLON NY I1704 PEEKSKILL NY 10566 "I ^ ^ ^ ^ OSSINING SANITARY SD WASTEWATER TREATMENT PLANTS PLANT. A .A AGER ATTN: PLANT MANAGER 6 NME CEmR E 75 WESTERLY ROAD fjg O OSSINING NY 10562 OR '. C 28603 KINGS MOUNTAIN WASTEWATER TREATMENT PLANT MT. IlOLLY WASTEWATER TREATMENT PLANT . ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 429 BOX 406 KINGS MOUNTAIN NC 28086 MOUNTllOLLY NC 28120 SPRUCE PINE WASTEWATER TREATMENT PLANT DURilAM WASTEWATER TREATMENT PLAhTS ATTN: PLANT MANAGER ATIN: PLANT MANAGER P.O. BOX 189 101 CITY HALL PLAZA SRUCE PINE NC 28777 DURHAM NC 27701 WILMINGTON WASTEWATER TREATMENT PLANTS GREENSBORO WASTEWATER TREATMENT PLAhTS I A'ITN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 1810 P.O. BOX 3136 WILMINGTONNC 28402 GREENSBORO NC 27402 CITY OF SHELBY WASTEWATER TREATMENT PLANT CMUD WASTEWATER TREATMENT PLAhTS - ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 207 5100 BROOKSHIRE BOULEVARD SHELBY NC28150 CHARLOTTE NC 28216 L-

7... e . CITY OF llENDERSONVILLE WASTEWATER TREATMENT MASON FARM WTP PLANT ATIN: WALTER R. GOTTSCllALK ATTN: PLANT MANAGER ) P.O. BOX 366 P. O. BOX 1760 CARRBORO NC 27510 IIENDERSONVILLE NC 28739 l 'N ) DURilAM CO TRIANGLE WASTEWATER TREATMENT TOWN OF li!LLSBOROUGI{ WASTEWATER TREATMENT PLAST PLANT ATTN: PLANT MANAGER ATIN: PLANT MANAGER 200 E. MAIN STREET P.O. BOX 429 DURHAM NC 27701 HILLSBOROUGli NC 27278 RALEIGil NEUSE RIVER WASTEWATER TREATMENT TAR RIVER WASTEWATER TREATMENT PLANT PLANT ATTN: STANLEY CURTIS ATTN: PLANT MANAGER P.O. BOX 1180 f P.O. BOX 590 ROCKY MOUNT NC 27802 RALEIGilNC 27602 E FOURTil CREEK WASTEWATER WINSTON-SALEM WASTEWATER TREATMENT PLANTS i STATE ' ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O.B M 25 H P.O. BOX 1111 WINSTON-SALEM NC 27102 STATESVILLE NC 28677 TOWN OF CARY WASTEWATER TREATMENT PLANTS FARGO WASTEWATER TREATMENT PLAST i ATTN: PLANT MANAGER ATTN: RAYMOND PETERSON P.O. BOX 1147 3400 NORTH BROADWAY i CARY NC 27513 FARGO ND 58102 l OF AKRM WASEWAHR MAMERAM f BISMARCK WASTEWATER TREATMENT PLANT AM A MANAGER j - ATIN: KEITH DEMKE 65 S. HIGH ST l P.O. BOX 5503 24M AGM MWMA N BISMARCK ND $8502-5503 AKRON OH 44313 I CITY OF ALLIANCE WASTEWATER TREATMENT PLANT CITY OF ASHTABULA WASTEWATER TREATMENT PLAB ' ATTN: PLANT MANAGER ATTN: PLANT MANAGER l 12251 N ROCKhlLL AVE SIXTH & WOODLAND AVE 1010 N. WALNUT 303 WOODLAND AVE. ALLIANCE OH 44601 ASHTABULA OH 44004

r, 1 o 31 - CITY OF ATilENS WASTEWATER TREATMENT PLAST CITY OF CANTON WASTEWATER TREATMENT PLANT SERVICE DIRECTORS OFFICE ATTN: PLANT MANAGER ATTN: PLANT MANAGER 3530 CENTRAL 557 EAST STATE ST. CANTON OH 44702 ATiiENS Oli 45701 CITY OF COLUMBUS WASTEWATER TREATMENT NEORSD WASTEWATER TREATMENT PLANTS PLANTS ATTN: FRANK M. CUFFARO ATTN: PLANT MANGER 3826 EUCLID AVE. DIV OF SEWAGE & DRAINAGE CLEVELAND OH 44115 910 DUBLIN RD. COLUMBUS Oli 43215 i CIT Y OF DAYTON WASTEWATER TREATMENT PLANT CITY OF FREMONT WASTEWATER TREATMENT PLANT WATER DEPT. ATTN: PLANT MANAGER ATTN: PLANT MANAGER 1019 SAND ST 2800 GUTHRIE RD. FREMONT OH 43420 DAYTON Oli 45418 CITY OF HAMILTON WASTEWATER TREATMENT PLANT GREATER CINCINNATI MSD DEPT OF PUBLIC UTILITIES ATTN: PLANT MANAGER A1TN: PLANT MANAGER 1600 GEST STREET ^ 1A L i 45011 CITY OF OXFORD WASTEWATER TREATMENT PLANT CITY OF PAINSVILLE WASTEWATER TREATMENT PLANT UTILITIES DEPARTMENT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 1170 NORTH STATE ST MUNICIPAL BUILDING PAINESVILLE OH 44077 OXFORD OH 45056 CITY OF TOLEDO PUBLICLY OWNED TREATMENT CITY OF TROY WASTEWATER TREATMENT PLANT UTILITIES DEPARTMENT IV F WATER RECLAMATION ^ ^^ f ATTN: PLANT MANAGER YF RO D BAY VIEW PARK 3900 N SUMMIT-TROY OH 45373 TOLEDO OH 43611 CITY OF WILLOUGHBY WASTEWATER TREATMENT CITY OF WOOSTER WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER PLANT ATTN SERVICE DIRECTOR 528 N. MARKET STREET 221 ERIE ROAD 1123 COLUMBUS ROAD WILLOUGHBY Oil 44094 WOOSTER OH 44691 1 1 1 I

s g e 32 - CITY OF XENIA PUBLICLY OWNED TREATMENT WORKS EUCLID WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: TOM VITOLO 101 NORTil DETROIT STREET 22201 LAKESHORE BLVD EUCLID Oli 44123 XENIA Oil 45385 CITY OF PONCA WASTEWATER TREATMENT PLANT MAHONING CO. BD. OF COMM. WATER & LIGHT DEPT. SANITARY ENGINEERING DEPT. ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 1450 761 INDUSTRIAL ROAD PONCA CITY OK 74601 YOUNGSTOWN OH 44509 TULSA METROPOLITAN UTILITY AUTilORITY CITY OF STILLWATER ATTN: PLANT MANAGER ATTN: PLANT MANAGER 200 CIVIC CENTER .O BOX 1449 ROOM #403 A OK N076 TULSA OK 74103 CITY OF llENRYETTA WASTEWATER TREATMENT PLANT CITY OF MUSKOGEE WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 5006 N liANCOCK-P O BOX 1927 P.O. BOX 608 MUSKOGEE OK 74401 IIENRYETTA OK 74437 OKLAHOMA CITY WASTEWATER TREATMENT PLANT CITY OF NO WASTEWATER TREATMENT PLANT A A MANAGER ATTN: PLANT MANAGER 420 W. MAN P.O. BOX 370 I OWAN OK 73070 KLAI OMA CITY OK 73102 OWBIA BN WASTEWATER MANERAM CITY OF CORVALLIS WASTEWATER TREATMENT PLANT ATTN ROSS W. PETERSON ATTN: PLANT MANAGER 5001 N. COLUMBIA BLVD P;O. BOX 1083 1120 SW STH AVE. ROOM 702 tORVALLIS OR 97339 PORTLAND OR 97203-2098 CITY OF ALBANY WASTEWATER TREATMENT PLANT UNIFIED SEWERAGE AGENCY ATI'N: PLANT MANAGER ATTN: PLANT MANAGER 300 VINE ST. SW 155 NORTH FIRST AVENUE P.O. BOX 490 SUITE 270 ALBANY OR 97321-0144 HILLSBOROOR 97124 i

t @ METRO WASTEWATER MANAGEMENT CO GRESHAM WASTEWATER TREATMENT PLANT h ^ ATTN: PLANT MANAGER 2 5 1333 NW EASTMAN PARKWAY SUITE 292 GRESHAM OR 97030 SPRINGFIELD OR 97477 PENN RIDGE WASTEWATER TREATMENT AUTHORITY BEAVER BORO MUN AUTil . ATTN: KEVIN FRANKS ATTN: PLANT MANAGER 180 MAPLE AVENUE BOX 31 469 TillRD STREET SELLERSVILLE PA 18960 0031 BEAVER PA 15009 \\ CHALFONT-NEW BRITAIN TWP JOINT UPPER MORELAND-HATBORO JNT SEW A'ITN: PLANT MANAGER ATTN: DONALD F. ARMSTRONG 1645 UPPER STATE ROAD P.O. BOX 535 DOYLESTOWN PA 18901 WILLOW GROVE PA 19090-0535 ALLENTOWN CITY AUTilORITY-WASTE ALCOSAN WASTEWATER TREATMENT PLANT ATTN: JOSEPH M. MCMAHON 111 ATTN: MICHAEL A. FLAMANG ^ ^ ^ ^ 3300 PREBLE AVENUE 112 MW SMET PITTSBURGH PA 15233 ALLENTOWN PA 18102 CITY OF JOHNSTOWN WASTEWATER TREATMENT NEW BRIGHTON BORO SAN AUTH PLANT ATTN: PLANT MANAGER BUREAU OF SEWAGE 610 THIRD AVENUE ATTN: PLANT MANAGER NEW BRIGHTON PA 15066 414 WASHINGTON STREET JOHNSTOWN PA 15901 ^ ^ BETHLEHEM CITY WASTEWATER TREATMENT PLANT T E 'T A Am MANAGER ATTN: PLANT MANAGER i 144 SHIMERSVILLE ROAD 100 SOtITH 2ND STREET BETHLEHM PA 16018 FRANKLIN COUNTY PA 17201 CARLISLE BORO WASTEWATER TREATMENT PLANT WYOMING VALLEY SAN AUTTI ATTN: FREDRICK BEAN ATTN: ROBERT BETZLER MANAGER EXEC. DIR 54 N. MIDDLESEX ROAD P.O. BOX 33 A MIDDLESEX TOWNSHIP PA 17013 WILKES BARRE PA 18703-1333 )

s J WARMINSTER TWP. MUN. AUTill ROCilEST11R AREA JOINT SEWER AUT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 300 WEST PARK STREET 415 GIBSON AVE ROCllESTER PA 15074 WARMINSTER PA 18974 LANSDALE BORO WASTEWATER TREATMENT PLANT UNIVERSITY AREA JT AUTH ATTN: PLANT MANAGER ATTN: PLANT MANAGER 1576 SPRING VAI. LEY ROAD 652 NINTil ST. LANSDALE PA 19446 STATE COLLEGE PA 16801 IIATFIELD TWP MUN AUTH YORK CITY SEW AUTil ATTN: PLANT MANAGER ATTN: RJCK SECifRIST 3200 ADVANCE LANE 1701 BLACKBRIDGE ROAD COLMAR PA 18915 YORK COUNTY PA 17402 MEADVILLE CITY WASTEWATER TREATMENT PLANT ER]E WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER A1TN: PLANT MANAGER 984 WATER STREET 68 PORT ACCESS ROAD MEADVILLE PA 16335 ERIE PA 16507-2202 LOWER LACKAWANNA VALLEY WASTEWATER SCRANTO'N CITY SEW AUTIIORITY TREATMENT PLANT ATTN: THOMAS MCDERMOTT ATTN: GERALD L CONNOLLY 307 NORTH WASHINGTON AVE P.O. BOX 67 SCRANTON PA 18503 COXTON ROAD DURYEA PA 18642-9990 DOWNINGTOWN REGIONAL WPCC AMBLER BORO WASTEWATER TREATMENT PLANT A ATTN: BRUCE JONES B 122 EAST BUTLER AVENUE 550 S. BRANDYWINE AVE. AMBLER PA 19002-4476 EXTON PA 19341 NEW UMBERLAND BORO WASTEWATER TREATMENT PHILADELPHIA CITY WATER DEPT. A A E. TOFFEY ATTN: PLANT MANAGER Oh A TOWER 1101 MARKET STREET gO 20 H ADERHIA PA 19107 CUMBERLAND COUNTY PA 17070

i I, lb l. MM VILLE MUN AUTil-SEWERAGE .g.YRONE BORO WASTEWATER TREATMENT PLANT ATIN: PLANT MANAGER ATTN: PLANT MANAGER BOROUGH BLDG. 35 UNION STREET BLAIR COUNTY PA 16686 i MORRISVILLE PA 19067 CITY OF BEAVER FALLS WASTEWATER TREATMENT ABINGTON TWP WASTEWATER TREATMENT PLANT 'fPLANT MANAGER ATTN: PLANT MANAGER 1176 OLD YORK RD 71515Til STREET ABINGTON PA 19001 BEAVER FALLS PA 15010 i GREATER liAZELTON JNT SEW AUTH LACKAWANNA RIVER BASIN SEWER AUTi!. ATTN: MIKE KELCHAK ATTN: PLANT MANAGER BOX 651 VALMONT IND. PARK MAIN STREET IIAZELTON PA 18201 DICKSON CITY PA 18519 AMBRIDGE BORO MUN AUTil. WASTEWATER BLOOMSBURG TWP MUN AUTil. WASTEWATER TREATMENT PLANT A A ATTN: PLANT MANAGER ATTN: PLANT MANAGER MUNICIPAL BUILDING $51 FORT MCCLURE BLVD 1001 MERCilANT STREET BLOOMSBURG PA 17815 AMBRIDGE PA 15003 i liARRISBURG AUTIIORITY WASTEWATER TREATMENT PLANT UPPER ALLEGHENY JOINT SAN AUTil ATTN: PLANT MANAGER ATTN: MR. ROBERT SZIMM3 ONE KEYSTONE PLAZA 320 4TH AVENUE SUITE 104 FRONT AND MARKET STREET TARENTUM PA 15084 j liARRISBURG PA 17101 NORRISTOWN MUN WASTE AUTil KISKI VALLEY WPCA ATTN: PLAfG MANAGER ATTN: SANDRA DUCKWORTil 235 EAST AIRY STREET 1200 PINE CAMP RD. NORRISTOWN PA 19401 LEECIIBUG PA 15656 CLARION AREA AUTilORITY WASTEWATER TREATMENT UPPER GWYNEDD-TOWAMENCIN WASTEWATER PLANT TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER 14 N. STl! AVENUE 2225 KRIEBEL ROAD CLARION PA 16214 LANSDALE PA 19446 l

4 RING TWP MUN AUTIL WASTEWATER TREATMENT llORSHAM TWP SEW AUTil ATTN: PLANT MANAGER A

AW M AGER 617B HORSilAM ROAD 2800 Sil!LLINGTON RD HORSilAM TOWNSillP PA 19044 READING PA 19608 CRANSTON WASTEWATER TREATMENT FACILITY EAST GREENWICil WASTEWATER TREATMENT F ACILITY ATTN: DONALD J. BENZ ATTN: PACILLO MICilAEL D.

869 PARK AVE P. O. BOX 111 CRANSTON RI 02910 EASTGREENWICIIRI 02818 EAST PROVIDENCE WASTEWATER TREATMENT ETCO FACILITY ^ 5 iBE 'D llLL RD S WOONSOCKET R1 02895 EAST PROVIDENCE RI 02915 NEW SilOREHAM WASTEWATER TREATMENT FACILITY FIELDS POINT WASTEWATER TREATMENT FACILITY ATTN: MARK J. JOHNSON ATTN: PLANT MANAGER P.O. BOX 774 235 PROMENADE ST NEW SHOREHAM RI 02807 PROVIDENCE RI 02908 JAMESTOWN WASTEWA TER TREATMENT PLANT COLUMBIA / METRO PLANT ATTN: STEVEN O. GOSLEE ATTN: PLANT MANAGER JAMESTOWN TOWN HALI' P.O. BOX 147 ^ JAMESTO RI 02835 I ESM WAMEWATER MAMM EAm TOSCH CREEK WASTEWATER TREATMENT PLANT A A DREW W. FAIREY ATIN: PLANT MANAGER 103 PHILIP ST. P O. BOX 987 P O DRAWER B UNION SC 29379 CilARLESTON SC 29402 WCRSA WASTEWATER TREATMENT PLANTS NCSD' FELIX C DAVIS WASTEWATER TREATMENT PLAN'I ATTN: PLANT MANAGER ATIN: RAYMOND PETERSON 561 MAULDIN ROAD P.O. BOX 63009 GREENVILLE SC 29607 N. CHARLESTON SC 29419-3009 i

a . ~. -. - - e. JOIINSONVILLE/ EAST PLAhT BLACKVILL WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: 11. DON LEWIS P.O. BOX 428 P.O. BOX 910 108 SEABOARD AVE ORANGEBURG SC 29116 JOliNSONVILLE SC 29555 FLORENCE SEWERAGE TREATMENT PLANT #1 VERMILLION WASTEWATER TREATMENT PLANT ATTN: ROBBIE MOTT ATTN: PAUL BRUNICK DRAWER RR CITY-CNTY COMPLEX 25 CENTER STREET FLORENCE SC 29501-3456 VERMILLION SD 57069 PIERRE WASTEWATER TREATMENT PLANT ABERDEEN WASTEWATER TREATMENT PLANT ATTN: GREG MOliR ATTN: PETER IIESLA i100 S. BUCilANAN 123 S. LINCOLN PIERRE SD 57501 ABERDEEN SD 57401 SIOUX FAI.LS WATER RECLAMATION BROOKINGS WASTEWATER TREATMENT FACILITY ATTN: GREGORY STACK ATTN: JOIIN WIRTZ 4500 NORTil SYCAMORE AVE. 525 WESTERN AVE SIOUX FALLS SD $7104 BROOKINGS SD 57006-0588 RAPID CITY WASTEWATER TREATMENT PLANT CITY OF BOXELDER ATTN: DAVE VAN CLEAVE ATTN: PLANT MANAGER 300 6Til STREET P.O. BOX 606 RAPID CITY SD $7701 BOXELDER SD 57719 i MARYVILLE SEWERAGE TREATMENT PLANT NASilVILLE-CENTRAL SEWERAGE TREATMENT PLANT i ATTN: MIKE T. STINNETT ATTN: PLANT MANAGER 332 IlOME AVENUE 1600 2ND AVE. N. MARYVILLE IN 37501 NASliVILLE IN 37208-2206 i NASIIVILLE-DRY CREEK SEWERAGE TREATMENT PLANT MEMPHIS E. MAXON WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PETER M. ALFONSO 61 EDENWOLD ROAD 2303 N. SECOND ST. MADISONTN 37115 MEMPHIS TN 38127 7500

l e MILLINGTON WASTEWATER TREATMENT PLANT SIGNAL MOUNTAIN SEWERAGE TREATMENT PLANT ATIN: PLANT MANAGER ATTN: HERSHEL E. DICK 1100 RIDGEWAY AVENUE / CITY HALL P.O. BOX 247 MILLINGTON TN 38053 SIGNAL MOUNTAIN TN 37377 M REESBORO-SINKING CR SEWERAGE TREATMENT KNOXVILLE SEWERAGE TREATMENT PLANTS KNOXVILLE UTILITY BOARD ATfN: WILLIAM W. LOVE ArrN: PLANT MANAGER 2032 BLANTON DR. KNOXVILLETN 37916 MURFREESBOROTN 37129 ERWIN WASTEWATER TREATMENT PLANT BRISTOL SEWERAGE TREATMENT PLANT #2 ATrN: SCOTrY STREET ATrN: PLANT MANAGER 244 LOVE STREET 578 BEAVER CREEK ROAD P.O. BOX 201 PROFESSIONAL SERVICES GROUP ERWIN TN 37650 BLUFF CITY TN 37618-9428 CITY OF OAK RIDGE POTS CilATTANOOGA-MOCCASIN BEND WASTEWATER ATTN: JACK ROBINSON TREATMENT PLANT P.O. BOX 1 ATTN; JERRY STEWART 300 S. MAIN 455 MOCCASIN BEND ROAD OAK RIDGE TN 37831-0001 CHATTANOOGA ~N 37405 JOIINSON CITY WASTEWATER TREATMENT PLANTS MILAN SEWERAGE TREATMENT PLANT ATfN: PLANT MANAGER ATIN: PLANT MANAGER 601 EAST MAIN STREET P.O. BOX 109 JOllNSON CITY TN 37601 MILAN TN 38358 BACLIFF MUNICIPAL UTILITY DIST TRA (TEN MILE CREEK) WASTEWATER TREATMENT ATTN: PLANT MANAGER PLANT 430312T11 ST. ATTN: PLANT MANAGER DRAWER 8717 P O BOX 240 BACLIFF TX 77518 ARLINGTON TX 73010 GALVESTON COLWTY WCID #1-SOUTH GALVESTON COUNTY WCID #8 ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 307 . P.O. BOX 337 DICKINSON TX 77539 SANTA FETX 77510 i

F j. o, CITY OF LA MARQUE WASTEWATER TREATMENT PLANT NORTH SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATTN: JERRY R. FUSSELL 1111 BAYOU 105 SOUTil 3RD ST. LA MARQUE TX 77568 SILSBEE TX 77656 TEXAS CITY SEWERAGE TREATMENT PLANT sr0001 ABILENE SEWERAGE TREATMENT PLANT ATrN: PLANT MANAGER ATTN: W.D. HARGESHEIMER P.O. BOX 2608 P.O. BOX 60 TEXAS CITY TX 77592-2608 ABILENE TX 79604 CITY OF LAKE JACKSON WACO REGIONAL SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATrN: NORBERT A. GOEDEKE 25 OAK DRIVE P.O. BOX 7555 LAKE JACKSON TX 77566 WACO TX 76714 7555 llASKELL ST. SEWERAGE TREATMENT PLANT CENTRAL SEWERAGE TREATMENT PLANT ATrN: ENRIQUE WOO ATTN: BARRY A. WRIGHT P.O. BOX 511 128 EAST FOURTH STREET 1 EL PASO TX 79961-0001 FREEPORTTX 77541 CLUTE WASTEWATER TREATMENT PLANT SOUTH SEWERAGE TREATMENT PLANT A MANAGER ATrN: JAMES P. BAKER W EAU MAW M P.O. BOX 1627 P.O OX 997 HUMBLETX 77338 BAY CITY SEWERAGE TREATMENT PLANT CITY OF HOUSTON SEWERAGE TREATMENT PLANTS ATTN: JOHN A. MARTINEZ ATTN: RUDOLPH S. SARICH 1901 FIFTH ST. 4545 GROVEWAY BAY CITY TX 77414 HOU5 TON TX 77087 -1122 O QUAIL VALLEY UD CITY OF AUSTIN WASTEW ATER TREATMENT PLANTS l ATrN: PLANT MANAGER ATTN: PLANT MANAGER l 3134 CARTWRIGHT ROAD P.O. BOX 1088 MISSOURI CITY TX 77459-2599 AUSTINTX 78767

a _. ~. ~.. _. ~ e 0 VILLAGE CREEK SEWERAGE TREATMENT PLANT SAN FELIPE SEWERAGE TREATMENT PLANT ATTN: ROBERT T. MCMILLON ATIN: GILBERT L. SANCliEZ 1000 TIIROCKMORTON P.O. BOX 4239 Bg DEL RIO TX 78841 , GR TX 76101 CITY OF GALVESTON WASTEWATER TREATMENT WELLS CREEK SEWERAGE TREATMENT PLANT A OBERT H. FORM ATIN PLANTMANAGER 504 N QUEEN ST. P O. BOX 779 PALESTINE TX 75801 GALVESTON TX 77553-0779 CITY OF PORT ARTilUR CITY OF DALLAS WASTEWATER TREATMENT PLANTS MAIN TREATMENT PLT ATTN: RUSSELL M. TIDWELL A'ITN: PLANT MANAGER 1500 MARILLA STREET P.O. BOX 1089 4AN PORT ARTliURTX 77640 DALLAS TX 75201-6318 CITY OF TYLER SEWERAGE TREATMENT PLANTS WOODLANDS WASTEWATER TREATMENT PLANT #1 ATTN: GREGORY M. MORGAN ATTN: PLANT MANAGER P.O. BOX 2039 2436 SAWDUST ROAD TYLER TX 75710 THE WOODLANDS TX 77380 CITY OF HITCHCOCK WASTEWATER TREATMENT GCWDA BLACKHAWK REGIONAL WASTEWATER PLANT TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER .7423 lilGiiWAY 6 910 BAY AREA BLVD. filTCHCOCK TX 77563 liOUSTON TX 77058-2604 NAVASOTA SEWEPAGE TREATMENT PLANT TRINITY RIVER AUTilORITY-REDOAK ATTN: GARY E. JOHNSON ATTN: PLANT MANAGER P.O. BOX 910 P.O. BOX $38 NAVASOTA TX 77668 RED OAK TX 75154 PROVO CITY CORPORATION SLC WATER RECLAMATION PLANT ATTN: MARK OGREN A'lTN: JON ADAMS P.O. BOX 1849 1365 WEST 2300 NORTH PROVO UT 84603 SALT LAKE CITY UT 84116

l C. NORTH DAVIS COUNTY SEWER DIST. CENTRAL WEBER SEWER IMP DIST. A g ATIN: GORDON CilAMPNEYS 4252 WEST 2200 SOUTil 2618 WEST PIONEER ROAD LAYTON UT 84041 OGDEN UT 84404 LOGAN CITY CORPORATION SOUTil VALLEY WATER REC FACILITY ^ . BX2 A'ITN: JOHN HAYS W ST O AN UT 84084 OGAN UT 8 2 ) CENTRAL VALLEY WATER REC FAC BURLINGTON MAIN SEWERAGE TREATMENT PLANT ATTN: GORDAN BEALS ATTN: STEVE ROY 800 W CENTRAL VALI.EY RD. 34 KILBURN STREET SALT LAKE CITY UT 84119-3379 BURLINGTON VT 05402 MONTPELIER WASTEWATER TREATMEN1 FACILITY NEWPORT MTP ATTN: PLANT MANAGER ATTN: ROGER F. BARAW CITY HALL CITY OF NEWPORT TOWN HALL PUBLIC WORKS 74 MAIN STREET-P.O. BOX 405 MONTPELIER VT 05602 NEWPORT VT 05855 ^ WINOOSKI WATER POLLUTION CONTROL FACILITY A P 'T AhAGER ATTN: PLANT MANAGER CITY OF SOUTH BURLINGTON EST AREN SMET 575 DORSET STREET TNOOSKI VT 05404 SOUTH BURLINGTON VT 05403 TAFTSVILLE WASTEWATER TREATMENT FACILITY RUTLAND WASTEWATER TREATMENT FACILITY ATTN: RUSSELL EASTMAN ATTN: G. LEWIS IlOTALING P.O. BOX 488 P.O. BOX 969 WOODS 10CK VI 03091 RUILAND V 1 0$702 i l llARTFORD WASTEWATER TREATMENT FACILITY LYNCHBURG SEWERAGE TREATMENT PLANT ATTN: LARRY ROGERS ATTN: WALTER R. YOUNGER 15 BRIDGE ST, 901 CHURCH ST WHITE RIVER JCT VT 05001 LYNCHBURG VA 24505 1

I i r. UPPE OCCOQUAN REGIONAL !.EWERAGE TREATMENT ROANOKE SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATTN: MILLARD ROBBINS 1402 BENNINGTON ST SE P.O. BOX 918 ROANOKE VA 24014 CENTREVILLE VA 22020 MOONEY SEWER. AGE TREATMENT PLANT FREDERICKSBURG SEWERAGE TREATMENT PLANT ATTN: MR RAYMOND SPIlTLE ATTN: PLANT MANAGER 4 PRINCE WILLIAM COMPLEX P.O. BOX 7447 PRINCE WILLIAM VA 22192 FREDERICKSBURG VA 22494 MT. SIDNEY FT DEFIANCE SEWERAGE TREATMENT ARLINGTON SEWERAGE TREATMENT PLANT .f GEORGE J. GROSS ATTN: PLANT MANAGER 3401 S GLEBE RD [.~rNONON ARLINGTON VA 22204 A 24401 LOWER POTOMAC SEWERAGE TREATMENT PLANT NORTilSIDE/SOUTHSIDE SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER ATTN: BOBBY E. BENTLEY 9399 RIGI!MOND llIGHWAY MUNICIPLE BUILDING LORTON VA 22079 DANVILLE VA 24541 IIARRISONBURG.ROrKINGHAM SEWER BLACKBURG VPI SANITATION AUTIL ATTN: PLANT MANAGER ATTN: MR. W. BANE ATKINSON P.O. B O X 8 P.O. BOX 52 MOUNT CRAWFORD VA 22841 BLACKSBURG VA 24063 CITY OF RICHMOND WASTEWATER TREATMENT PLANT CITY OF HOPEWELL SEWERAGE TREATMENT PLANT ATTN: PLANT MANAGER AlTN: PLANT MANAGER P.O. BOX 26505 P.O. BOX 969 RICHMOND VA 23219 HOPEWELL VA 23860 l CITY OF RICHLAND WASTEWATER TREATMENT HRSD FACILITY ATTN: MR. R.W. LAWRENCE ATTN: WILLIAM HARLAN P.O. BOX 5911 555 LACEY ROAD VA BEACH VA 23471 BOX 190 ) RICHLAND WA 99352-0190 l ^

I P 0 CT F BELLINGHAM WASTEWATER TREAT 1 TENT m'NWOOD WASTEWATER TREATMENT FACILITY ATTN: PLANT MANAGER ATrN: WILLIAM MC COURT P.O. BOX 5008 2221 PACIFIC ST LYNNWOOD WA 98046-5008 BELLINGilAM WA 98226-5898 CITY OF ELLENSBURG WASTEWATER TREATMENT CITY OF EDMONDS WASTEWATER TREATMENT PLANT PLANT ATrN: STEPHEN KOllO A1TN: PLANT MANAGER 200 W 2ND AVE SOUTil 420 N. PEARL ST. j EDMONDS WA 98020 ELLENSBURG WA 98926 1 VANCOUVER WESTSIDE SEWERAGE TREATMENT PLANT CITY OF VANCOUVER (MARINE PK) ATTN: BOEOWEN BOE ATTN: PAUL PROCTOR 210 EAST 13TH STREET 4650 SOUTHEAST COLUMBIA WAY VANCOUVER WA 98668 VANCOUVER WA 98661 1 SPOKANE ADVANCED WASTEWATER TREATMENT KING COUNTY METRO A PETER.M O NO A TIM PELTON 82125 A\\Eb E W. 808 SPOKANE FALLS BLVD SPOKANE WA 99201-3343 ABERDEEN / COSMOPOLIS WASTEWATER TREATMENT gg. OF PRINCETON WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 730 200 EAST MARKET STREET PRINCETON WV 24740 ABERDEEN WA 98520 CITY OF MORGANTOWN WASTEWATER TREATMENT CITY OF HUNTINGTON WASTEWATER TREATMENT PLANT PLANT AT1N: PLAST MANAGER ATTN: PLANT MANAGER P.O. BOX 852 P.O. BOX 1659 MORGANTOWN WV 26507-0852 HUNTINGTON WV 25704 CITY OF CHARLESTON WASTEWATER TREATMENT PLANT CITY OF WHEELING FAC SANITARY BOARD ATIN: ALBERT CAMPBELL ATrN: PLANT MANAGER P.O. BOX 6348 26TH & MAIN ST. P.O. BOX 1026 WHEELING WV 26003-0804 CllARLESTON WV 25324

q o ^ ^ ^ VILLAGE OF SUSSEX WASTEWATER TREATMENT PLANT A P A 'T A AGER ATrN: JAMES THALKE 227 WEST PIKE ST. N59W2362 SILVER SPRING DR MUNICIPAL BUILDING. SUSSEX WI $3089 CLARKSBURG WV 26301-4254 CITY OF MARSHFIELD WASTEWATER TREATMENT GREEN BAY METRO SEWERAGE DIST. ATTN: WILLARD DEBAUCHE A DAVID C. PATEK P.O. BOX 19015 O GREEN BAY WI 54307-9015 ARS I IELD WI 54449-0727 CITY OF ANTIGO WASTEWATER TREATMENT PLANT CITY OF WAUPUN WASTEWATER TREATMENT PLANT ATTN: MILES STANKE A rrN: DENNIS WESTHUIS CITY HALL 700 EDISON ST 220 N FOREST ST ANTIGO WI 54409-1955 WAUPUN WI 53963 r ^ CITY OF BEAVER DAM WASTEWATER TREATMENT CITY OF APPLETON WASTEWATER TREATMENT PLANT PLANT ATrN: RICHARD T DE BROUX iM. or< och o I d-ATTN: ROBERT KACHELSKI 200N APPLETON ~ APPLETON.WI 54915 .ddecLg 205 S LINCOLN AVENUE __ _ J BEAVER DAM WI 53916 BROOKFIELD FOX WATER POLLUTION CITY OF DE PERE WASTEWATER TREATMENT PLANT ATIN: ' ROM E!FLER ATTN: NANCY NUSBAUM 2000 NORTH CALHOUN RD 335 S BROADWAY BROOKFIELD WI 53005 DE PERE WI 54115 CITY OF FOND DU LAC WASTEWATER TREATMENT MADISON METRO SEWERAGE AUTH. A A ES NEEE A Th JACK HOWLEY 1610 MOORLAND ROAD pg ggy g FOND DU LAC WI 54936 f CITY OF MENOMONIE WASTEWATER TREATMENT MILWAUKEE METROPOLITAN SEWER DISTRICT PLANT WASTEWATER TREATMENT PLANT ATrN: ANITA K. KLAMM ATTN: FRANK MUNSEY CITY HALL JONES ISLAND 800 WILSON ST. 700 E.3ONES MENOMONIE WI 54751 MILWAUKEE WI 53207

[r b: J ! [ CITY OF OSHKOSil WASTEWATER TREATMENT PLANT CITY OF KENOSilA WASTEWATER TREATMENT PLANT BO 11 0 ATTN: FRED NELSON 215 CHURCH AVE. 812 56m SMET OSHKOSilWI 54902 KENOSHA WI 53140 l WAUKESilA SEWERAGE TREATMENT PLANT CITY OF JANESVILLE WASTEWATER TREATMENT PLANT ^ OED ATIN: ROBERT BOLDT g g 1 A DR. 701 DELAFIELD kVAUKESHA WI 53186 JANESVILLE WI 53546 CITY OF LAKE MILLS WASTEWATER TREATMENT PLANT WI DELLS LAKE DELTON SEW COMM ATTN: ALLEU ATTN: KAY MACKESEY 103 CllORCH STREET P.O. BOX 87 LAKE MILLS WI 53551 LAKE DELTON WI 53940 WALWORTil COUNTY METRO RIVERTON WAS1 EWATER TREATMENT PLANT ATTN: JOSEPH CANNESTRA A1TN: MIKE BELLAH 975 W. WALWORTH AVE 816 NORTH FEDERAL BLVD. DELAVAN WI 53115 RIVERTON WT 82501 ENT RAM SP$R BD O PLBL L;T L T CITY OF LARAMIE WASTEWATER TREATMENT PLANT ^ ^ ^^ ATTN: WALTER LEE GAINES 200 NORTH DAVID b i E %Y 82070 CASPER WY 82601 ROCK SPRINGS WASTEWATER TRE' TMENT PLANT PRASA PUERTO NUEVO A ATTN: MIKE GAVIOTIS ATTN: VICTOR ANDUJAR 212 D STREET P.O. BOX 7066 ROCK SPRINGS WY 82901 BARRIO OBRERO STATION SAN JUAN PR 00916-9990 PRASA PONCE SEWERAGE TREATMENT PLANT PRASA CAROLINA WASTEWATER TREATMENT PLANT AlTN: PLANT MANAGER ATTN: PLANT MANAGER P.O. BOX 7066 P.O. BOX 7066 BARRIO OBRERO STATION SANTURCE PR 00916 BARRIO OBRERO STATION SANTURCE PR 00916 (

~ ~~. ~ .. i i PRASA MAYAGUEZ WASTEWATER TREATMENT PLANT ATTN: PLANT MANAGER P.O. BOX 7066 BARRIO OBRERO STATION SANTURCE PR 00916 j i \\ l}}

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