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HomeMy WebLinkAbout03 PHG'S 1998-200 RPT. 01-07-02AG E N DA RE PO RT NO. 3 01-07-02 850-90 MEETING DATE: JANUARY 7, 2002 TO' FROM' SUBJECT: WILLIAM A. HUSTON, CITY MANAGER PUBLIC WORKS DEPARTMENT/WATER DIVISION PUBLIC HEALTH GOALS (PHGs) 1998-2000 REPORT SUMMARY Provisions of the California Health and Safety Code specify that larger (>10,000 service connections) Water Utility Systems prepare a special report and conduct a public hearing if any contaminants above the Public Health Goals (PHGs) established by the California Environmental Protection Agency's Office of Environmental Health Hazard Assessment (OEHHA) or above the Maximum Contaminant Level Goals (MCLGs) set by the United States Environmental Protection Agency (USEPA)if OEHHA has not published a PHG for the contaminant are detected in the water system. The purpose of the report is to give water system customers information on levels of contaminants below the enforceable mandatory Maximum Contaminant Levels (MCL) established by USEPA and the California Department of Health Service (CDHA). PHGs and MCLGs are not enforceable water quality standards and no action to meet them is mandated. The Tustin Water System exceeds the PHG for copper but is below the action level of the mandatory MCL established by USEPA and the California Department of Health Services, the agencies responsible for establishing drinking water standards. The City of Tustin is in compliance with all regulatory water quality standards. RECOMMENDATION It is recommended that the City Council'take the following actions' 1. Conduct a public hearing to accept and respond to public comments on the 1998-2000 Public Health Goals Report; and 2. At the conclusion of the public hearing, approve the 1998-2000 Public Health Goals Report. FISCAL IMPACT None. BACKGROUND SB1307 added provisions to the California Health and Safety Code that mandated all Public Water Systems serving more than 10,000 service connections must prepare a brief written report that provides information on the detection of any contaminants above the Public Health Goals (PHGs) published by the California Environmental Protection Agency's Office of Environmental Health Hazard Assessment (OEHHA). The report must also list the detection of any contaminant above the Maximum Contaminant Level Goals (MCLG) set by the USEPA for all other contaminants until such time as OEHHA has published PHGs for the other contaminants. The purpose of the report is to provide water service customers access to information on contaminants even below the Public Health Goals (PHG) 1998-2000 Report January 7, 2002 Page 2 enforceable mandatory Maximum Contaminant Levels (MCLs). The USEPA and the California Department of Health Services establish MCLs at very conservative levels to provide protection to consumers against all but very Iow to negligible risk. MCLs are the regulatory definition of what safe is. MCLs are the criteria for being in compliance with regulatory water quality requirements, not MCLGs or PHGs. Additionally, the code requirements intend to provide an idea of the cost to totally eliminate any trace of the contaminant from drinking water regardless of how minimal the risks may be. MCLGs and PHGs are set at very Iow levels where the health risks are very Iow. Determination of health risk at these Iow levels are frequently theoretical based on risk assessments with a lot of assumption and mathematical extrapalation. Best available technologies to measure such Iow levels have not been defined and may not be realistically available. Therefore, any costs estimates are highly speculative and have limited value. DISCUSSION The only constituent that exceeds its PHG in the City of Tustin's Distribution System is copper. All other water quality monitoring results are less than the PHG or MCLG. There is no drinking water Maximum Contaminant Level (MCL) for copper. Instead, the California Department of Health Services has adopted an action level for copper where the 90th percentile value of all samples from household taps should not be exceeded. Based on the September 2000 sampling data, the 90th percentile value for copper in the Tustin Distribution System was 0.62 mg/I. This value exceeds the PHG level of 0.17 mg/I established by the OEHHA but is lower than the regulatory level of 1.3 mg/I established by the California Department of Health Services. The category of health risk for copper is gastrointestinal irritation. By virtue of being in full compliance with the Federal and State regulatory requirements for copper, the California Department of Health Services has deemed that the Tustin Water System has optimized corrosion control. Optimizing corrosion control is considered to be the best available technology to deal with corrosion issues and with any copper findings. The Water Division will continue to monitor water quality parameters that relate to corrosivity, such as pH, hardness, alkalinity, total dissolved solids, and will take action such as additional line flushing to maintain our system in an "optimized corrosion control" condition. Since, the City is meeting the "optimized corrosion control" requirements, it is not prudent to initiate additional corrosion control treatment as it involves the' addition of other chemicals and there could be additional water quality issues raised. Therefore, no estimate of cost for treatment options to meet the Public Health Goal levels was prepared. Director of Public Works/City Engineer ,J'~ Sovella Interim Water Services Manager ATTACHMENT TO NO. 3 ii CITY OF TUSTIN PUBLIC HEALTH GOALS (PHG) 1998-2000 RE.PORT July, 2001 Prepared by: Tetra Tech ASL 16241 Laguna Canyon Road, Suite 200 Irvine, CA 92618 J:\329't \O025\msO01 dwz.doc PURPOSE The purpose of this report is for the City of Tustin to comply with the provisions of the California Health and Safety Code. This code specifies that larger (<10,000 service connections) water utilities prepare a special report by July 1, 2001 if their water quality measurements have exceeded any Public Health Goals (PHGs) established by the Cal-EPA's Office of Environmental Health Hazard Assessment (OEHHA). The law requires that where OEHHA has not adopted a PHG for a constituent, the Water suppliers are to use the MCLGs.adonted by U.SEPA.. These PHGs and MCLGs are listed in Attachment No. 1. This legislative requirement is to give water system customers access to information on levels of contaminants even below the enforceable mandatory Maximum Contaminant Levels (MCLS). Additionally, this requirement intends to provide an idea of the cost to totally eliminate any trace of the contaminant from drinking water regardless of how minimal the risk might be. INTRODUCTION The City ofTustin provi, des potable water service to most of the i.~6rporated area of the City and also to unincorporated areas north of the City. The City of T~.~in's existing sources of water supply include 15% MWD imported water and 85% water from'seven,~ntreated or "clear" groundwater wells that pump. directly into the system, and two treatment facil~'~s (Main Street Treatment Plant and 17~ Street Desalter) that treat groundwater from five additional wells. At three of the well sites supplying water directly into the'system, water is blended with other well water or the imported, water to reduce niti'ate concentrations below the State Maximum Contaminant Level (MCL). More specifically, Prospect Well is blended with MWD water, the Columbus-Tustin and Beneta wells are blended together.. The drinking water quality of the City of Tustin meets all State of California, Department of Health Services (DHS) and USEPA drinking water standards set to protect public health. This report reviews the' existing water quality data of the water within the distribution system, and compares the water quality to PHG and MCLG levels, which are not regulatory levels, but are deemed as desirable. In this review of data from 1998 through 2000; the only contaminant that exceeded a PHG or MCLG was copper within the distribution system. This report describes PHGs and MCLGs, describes the data that was reviewed, and presents the results. Data summaries of the analy.ticaI and monitoring data reviewed are attached for documentation purposes. WHAT ARE PHGs? It is important to first note the description of PHGs. PHGs are set by the California Office of Environmental Health Hazard Assessment (OEHHA) which is part of Cal-EPA and are based solely on public health risk considerations. None of the practical risk-management factors that are considered by the USEPA or the California Department of Health Services (CDHS) in setting drinking water standards .(MCLs) are considered in setting the PHGs. These factors include analytical detection capability, treatment technology available, benefits and costs. The PHGs are not enforceable and are not required' to be met by any public water system.. MCLGs are the federal equivalent to PHGs. CITY OF' TUSTIN Public Health Goals (PHG) TETRJ~ TECH ASL i WATER QUALITY DATA CONSIDERED The' California Health and Safety Code, Section 116470(b) is clear that a system only needs to write a report if they exceed one or more PHGs or MCLGs listed on Attachment No. 1. In order to determine if there was an exceedance water quality data was reviewed. The data reviewed is the same data used for determining compliance with drinking water standards for the years of 1998 through 2000. This data consisted of the following: Samples from the seven wells supplying water directly to the distribution system. These wells are: 1. TuStin Avenue 2. Yorba Street 3. Prospect Avenue 4. Columbus-Tustin 5. Beneta 6. Walnut 7. Vandenburg Nitrate analysis from the two treatment plants effluent (Main Street and 17th.Avenue). · Nitrate analysis from the three wells that are blended. These wells are' .: 1. Columbus-Tustin 2. Beneta 3' Prospect · Coliform' data collected within the distribution system. Samples from the wells before treatment. These wells are' 1. Main Street Well Nos. 4 and 2 (these are the same well) 2. Main Street No. 3 3. 17th Street Desalter Well No. 1 4. 17th Street Desalter Well No. 2 5. Newport Avenue · Copper and Lead samples in the distribution system. WAIVER FOR CERTAIN CONSTITUENTS Many of the constituents required for the PHG report have been waived from sampling by the DHS (see the attached "Groundwater Vulnerability Assessment and Waiver Status" GVAWS),' due to the fact that the results for these constituents are consistently non-detect. These constituents are also listed in Attachment No. 1. The Monitoring Frequency column in the GVAWS reflects certain compliance periods. There is actually one nine-year compliance cycle with three periods. These periods are listed as follows: Period 1' Period 2' Period 3' January 1, 1993 to December 31, 1995. January 2, 1996 to December 31, 1998. .. January 1, 1999 to December 31,2001 CITY OF TUSTIN Public Health Goals (PHG) TETRA, TECH ASL The current sampling schedule is consistent with the schedule established for the second compliance period, as DHS has not yet adopted the Period 3 schedule. It is also important to note that two of the PHGs (Acrytamide and Epichlorohydrin) are not applicable for the City of Tustin since they are surface water constituents and not groundwater constituents. RESULTS The only constituent that exceeds its PHG in the City of Tustin's distribution system is copper. All other water quality monitoring results are less than the PHG or MCLG. The appendices include all data analyzed and the summary of the results listed in spreadsheets. Copper There is no drinking water MCL standard for copper. Instead, DHS has adopted an Action'Level of 1.3 mg/L for copper, where the 90th percentile value of all samples from 'household taps in the distribution system should not exceed, a level of 1.3 mg/1. The established PHG for copper is .0.17 mg/1. The category of health risk for copper is gastrointestinal irritaiion. Numerical health risk data on copper have not yet been provided by OEHHA, the State agency responsible for providing that information. DHS has specified in their "Groundwater Vulnerability Assessment and Waiver Stares" that copper needs to be sampled only once eve.ry three years. Based on the September 2000 sampling data on the distribution system, the 90th percentile value for copper was 0.62 m~L, which exceeds the PHG level · of 0.17 m g/L. The Tustin water system is in full compliance with the Federal and State Lead and Copper Rule, since the 90th percentile value is below the Action Level. Therefore, the city is deemed by CDHS to have "optimized corrosion control" for the system. In general, optimized corrosion control is considered to be the best available technology to deal with corrosion issues and with any lead or copper findings. The City of Tustin continues to monitor Water quality parameters that relate to corrosivity, such as pH, hardness, alkalinity, total dissolved solids, and will take action if necessary to maintain the system in an "optimized corrosion control" condition. Since the City meets the Action Level standard, but exceeds the PHO'. theySh'tay consider an increase in line flushing for the particular distribution sections affected. However;' '~'ince Tustin is meeting the "optimized corrosion control" requirements, then it is not prudent to initiate additional corrosion control treatment as it involves the addition of other chemicals and there could be additional water quality., issues raised. Therefore, no. estimate of cost for treatment options to meet the PHG level has been included. CITY OF TUSTIN TETRA TI;CH ASL ATTACHMENT NO. I ATTACHMENT NO. 1 CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs INORGANICS '~ANTIMONY ..... .'_. II ........ ~g/L 0.003 ....... 0'.' ~ I I __ "!ASBESTOS ........ , ...... flbers/L L.2~ mi.Ilion ~ i'~ .,mi!llo~..) ',BARIUM ..... . mg,/L. . 0..1 _ I2) , 'BERYL,,.LI0'u .." ," '. ......... mg/L 0.001 (.0..004) - , ~CADMIUM ..... mg/L ' 0.'001 ' 0.00007 CHROMIUM mg/L ,, .0..01 0.0025 ':~COPPER ,(at thO'.tap: 9~th pe'fcentil'e) '"i ..... mg/L 0.05 ' '0.17' :CYANIDE ' .mg/~. ..' "0,1 ' ' 0.'i~ .. ' ~- FLUORIDE mg/L. o. 1 1 ~LEAD (at the tap:. 06ih per.~enti!e) ....... mg/L .' '0.005' ..' ' "0.002 " ~MERCURY. ......... i ........ mg/L 0.001 0.0012 ' -- N~TRATE [as N] ......... mg/L ' 0.4 ...... 10 ~-- , .NITRATE [as N0..3] ..... mg/L ".,.21 '" 45 ' NITRITE [as N] mg/L 0,4 1 S~ELENIUM .......... . . m~L 0.0,05 . (0.05) . .THA, LLIU, M ........... mg/L. ,, 0:.001 , , 0:00,0~1, ~ 1 1 1 I ORGANICS " AoRYLAMID~ ............ .i TT ' ' ' 2 ALAcHLOR ............ ,... mg/L 0'i00"~ 0.004. ' ATRAZI~E ....... . .... ~ .... mg/L ' 0,00i .... 0,00615 · 2 BI:::NT~,,ON ................. mg/L ...' 0,002 0,2 'BENZENE m.g/L 0.0005' ' {0> .... 2: BENZ0 (_'.a) ~;YRENE .... . , .. rog/L.. 0.0001' ' 0.~00004 '-CARBOFURA~ ' ' ~ _mg/L. 0.0d5 ' "~.0017 'CARBON TETRACHI'c~ibE " ..., mg/b 0.0005 . 0.0001 .~ =_CH LORD'~i,~E ........ mg./L. " 0~000'1 '~).000~)3 ' - ' CHLORO~i~HEN'E"[VI'NYL- ., _ , ........ C~LORIDE] , mg/L. 0.0005 0.00005 'CIS-1;2-DICHL, 0.R. OETHYL. ENE ... mg/L., 0,01 (0.07) 2,4-D ....... mg/L 0.01 0.07 DALAt~'ON'' .. .mg/L. 0.00001 .... . 0.7-~" _ -DIBRO. MOC..H. LOR'O' PR~,P'~'NE '[DBCP] .... mg~'L ' ..O.0Q05 .... 0,000'~017 ..... 1,2-DICHLOROB'ENZEN'E [ORTHO] ..... mg/L 0.0005 '" (~.6 ~ ,4'D,,I.C, .H, LOROB ENzEN E.[pARA] .mg/L ' 0.0005 ....... 0.006" ~1,27.D. ICHL,OR.,,E-i,HANE,[1,2'DCA]' . ' .... mg/L '" 0.0005 '0.00'04 "-- 1,2'DICH..LORQE:FH, ENE[1,1-DCE] .mg/.L , ..0.0005 0.01 .... DICHL.0BOME tHANE (Me.t. hylene Ch'[0ride) . m~..L 0.,0.005.... ' ~0.004 '- -1,2'DICHLOR_ .O, pROpANE ....... mg/L ,. 0.0005 0.00~5 1,3'DI.CHL~R. O .PROpENE .mg/.L.. .. 0.0005 0.0002 .. . _ .... 'DI_ (2-ETH.YLHEX. YL) ADIpATE ... .m. g/L .q,:00.5 (0.4) DI (2-E~HyLHEXYL) ,P, .H, TH .A. LATE ..... m..g/L 0.003 0.012 DINOSEB ........... m~/L, 0.002 '~.01~ ......... 2 2 2 2 2 Waiver Status Code: a Annual ~ Sample once per compliance period ~" Waived for one compliance period. Sampling for asbestos occurred in first compliance period. Thus, it was not tested for this period. ~ Waived for second compliance period 3 Sample once every three years tva Not applicable for the City of Tustin ATTACHMENT NO. I (Cont'd) CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs I .... _pARAMET..ERs/cONSTITUEN-T$ [ units I StateMCL [i.. PHGor(MCLG) INORGANICS DiQXj~ i2,3,~;~, TCDD] . mg/L ........ 5xl 04 -":-((~ ..... ...'' D.i.QUAT ............... rng/L .... 0.004,1 _, i,,, 0.015 , .. ENDOTHALL __ mg/L 0,045 0.58 ,,ENDRIN _ _ .mg/L . 0,0001 0.0018 ,,, EPICHLOROHYDRIN . TT ....... (0) . .. -~'I'H+E'BENZEN'~ _ mg/L -010005 0.3 .~H.'YLI~.N'.E?IBR~MIDE iEBD] . . mg/L 0.00002 ~ - : ('~)' '. i'.' "..,. GLYPHOSATE mg/L 0.025 , _ 1 HEpTA ,CHLO.R ................... mg/L 0.00.00.1, 0.000008 _, .~EpT.A. CHLOR E, ,P~X!DE ........ mg/L 0.00001 0.000006 ... HEXACHLOROBENZENE mg/L 0.0005 .I0) ..... HE×~.C~I[.OROCYCLOPENTADI ENE _ ~ mg/L 0.001 " 0..05 'LIND~,NE' _ mg/L 0,0002 0.000032 MET'H'~:~cHLOR " mg/L. , . 0.01 0.03 METHYI~-Ti=RTIA~RY BUTYL ETHER,'~(MTBE) _ mg/L ' 0.003 0,013 ' ~-~O.N-~..CHLOROBE.N. ZENE (c..,h.!oroben. zene) mg/L~ ,- ..0.0005 (0.0.1.) .. ~,OXAMYL _ mg/L. 0.02 , 0.05 ................. pENTAcHLORO~I'ENOi'- .... ~ .... .,, I mg/L 0.0002 0,0004 pIC~LO~IAM" mg/L 0,001 0.5 ' :P..o' E'y~-I-J'Lo_RINATED BIPHENYLS [pCBS] mg/~L :-0;0005 iDi ..... . '.S. ILV EX. [2:.4:5-TP] mg/L 0.001 (0:.05) j SIMAZINE.., ......... _ ...... mg/L 0.001 (0.004). .". i STYRENE . mg/L 0..0005 (0.1) '1,, i ,2~'2~T~.R. ACHLO ROETHAN E ......... 0,,0.005 ....... (0) ...... ,.T ,ETRA,..C,H.. ,L ,.O. ROETHYLEN E [PCE] mg/L 0.0005 .... (0) THIOBENCARB' _ mg/L 0.001 0.07 ......... TOLUENE _ mg/L 0.0005 0.15 TOXAPHENE mg/L .0.001 ,, (0) .... iTRA.NS:'I':2-~ic. HL~.'.R.o'ETHYdE, NE ...... mg/L 0.0005 (0:.1). _ . 1,2,4-TFIICHLOROBENZENE mg/L' 0.0005 0,005 ,.1 'I.,1,-,T.R,!.CH,L.,OROETHANE [.1,1,1~TCA] mg/L 0.0005 '(0.2)' ' .I,,1,2-,TR!CHLORO .E'[.,HANE [!,I,2-TCA] , mg/L .... 0.0005 ....... I,,0.0o_3) ....... iTRICH~,OROETHYLENE [-I'~CE] ' _ ..... mg/L 0.0,0,05 ., 0.000.8 ..... ITRICHLOROFLUOROMETHANE (FREON 11) mg/L 0.00.05 ......... 0.7 ';~'i~i"C'I~LORoTRIFuoRoETHANE(FREON!.13) mg/,L' ', 0.01 ,i ........4 ,, ,i'i' ~:~LE'NES [SUM OF ISOMERS] 0.000~ 1.8 · MICROBIOLOGICAL [(~_OL_.{F~_-.RM %' POSITIVE SAMPLES. . _ ~ I .'.0./¢..'.. t .... ii_1 _i _(zer°) Waiver Status Code: a Annual ~ Sample once per compliance period la Waived for one compliance period. Sampling for asbestos occurred in first compliance period. Thus, it was not tested for this period. 2 Waived for second compliance period 3 Sample once every three years r~a Not applicable for the City of Tustin BACK-UP JUN-~-01 15 : 18 FI~0M:0C~D 714-378-3~03 ID: 714 378 33~8 PAGI~ GROUNDWATER SOUKCE VULNERAB~ITy ASSESSMENT AND .WA2WER. STATUS ?. , · SECOND COMPLIANC~ PEPJOD . 3anua~ 1, 1996 to December 3 i, 1998 · 5.1,2,3 5022 Chamicala ) (Table. 8443 l-A, Tabb 6443 l-B) Aluminum, Antitank, Arsenic, Barium, B~ryllium, CaaSn~, Chromium, Mercury, Nlckel, ,~elenium, Thalliurn, Fluoride ~4~ ~-^) 4.~Se~to~ Cyanide .. IOCs (T~bl~ 6443 Nitrate · IOCs (Tabl~ 6443 l-A) Nitrite Volatile Organic (VOCs) (ra~a .644nn.A(~)) Benzene, Carbon Tetrachlorid~, 1,2-Dichloroben~zne, 1,4-Dic/doroberaene, I, ]-Dichlaroethang 1,2.Dichloroethane, I, 1-D iaMoroe&yl, ne, tis-J, 2-D ichloroethylene, tran~. 1,2.D ichloroethylene, D ichloromethane, 1,2.Dichloropropane, I, 3-Dichloropro£ezig F, thylbenzene, Monochlorobenz~ne, Styrene. I, I, 1,2. Tezrachloroetharu~, Tatrachloroellylen~ Toluene, 1.2. 4. Trichloroben~,ne, . l, I, I- Trichloro, thane, l, I , 2- Trichloroethane, Trichloroethy~ne. Tric/~oroflltorornethane, I, 1, 2- I}'lchloro- l, 2, 2. Trifluoro~thane, Finyl Chloride, ,Yylene~ Urir~gula~ed 'gani¢ Ch~mical~ (Tabl~.~,S0-A) . Bromobenzzne, Bromodichlorometha~, Bromoforrn, Bromomethane, Chlorodt'bromomer~¢, Chloroethane, Chloroform, CMoromethan~, 2-Chlorotoluene, 4-CMorototuene, Dibromom~rhane, 1, $-D ichlorobenzene, Diahlorodifluorometha ne' I, $-Dichloropropane, 2, 2-Dichloropropane, I, l-D icMaropropene, 1.2. $. Trichloropropan~ * 'Quarterly if greater than or equal to 50 percent of th~ MCL. Onc~ per complianc~ period Waiver for one Not vuherab!e Granted period per compliance . Not vulnerable Waiver cycle while waiver is · . Grartt~d in ~ffect Vulnerable A-l~nUaP par compliance pez~od' Annual Page 1 of 3 JUN-25-O ! 15:19 FI~OM,OCWD 714-378-3~-03 ID, 714 378 33~8 PACE 504 507 508 515.I 531.1 5~7 548 549 550 soc~ .(Tam~ ~~.^(~)) Molinate, Thiobencarb Unregulamd Organic Chemicals' (Tame 64450-C) ,ildrin, Dieldrin, Propa~hlor .................................. -~.-'.-.Zi'_:-_'-2~' !~' , ,,_', _',, Bentazon, Darapon, Peraachlorophenol,. Pi~.loram, 2,4-D --sacs... ' ¢'~a~ ~-~ ~ ~-^(~)) "" Dlnaseb, 2, 4,5.7R Nonvulnerable . tNonvulnerab/e .... Nonvulnerable NonvuknerabI¢ Nori~ulnorable . _ __~ ......__~ ..... ., Nonvulnerable (Table 64450-C) Dicamba '~--'$6-~ '(Tabi~ ~~'~,-(b-)i'' ~'::- ' ........ Carbofio-an, Cbcamyl .{ U~eguh£ed Organic Chemicals (Table 64450-C) Aldicarb, Aldicarb ~ulfon~ A ldicarb sulfoxids Um:cgulate~ iSrgmiC Cl{~nicals (Table SOCs '~-f~ie 64444'ACo)) Gtyphosare · Enclothall Di~uat sOC~ ' '¢~:~[~ ~~ X¢ ) 5 ................ ~en:o(a)pyrer~ Susceptibility Waiver Granted Suac~ptihflit~' Wa/v~ Granted Waiver Granted Susceptibility Waiver Granted Waived for secon, compliance period Waiver Granted Su~cep. tibility Waiver ' Grained -'OS~ w~i~;'e~ ........ Waiver Granted -:- Nonvuln~rabM Waiver Granted : USe wai/~er Nonvalnerabl¢ Granted ........... Nonvulne~le. Waiver Grau. t~d ......... ,_... ..... Nonvulnm-aNe Waiver Granted ~--,,, ......... . ..................... , ' ....Use Waiver' Nonvuln~rable Gmnt~d ;" . - . .5 .-~;..___.. Nonvulnerable . Nonvulnerable Waiver Once per :omplianze period · __ _ :--: - :7:- ~ Waived for second compliance period __ Waived for second compliance period Waived for second compliance period Waived for one ¢ O mpl_i_a_n, ?,, c_.y._ci e , Waived for second compliance period Waived for second compliance period Waived/'or one compliance cycle -- '-- i.~, _ _. ..... _. ! . __ _._ Waived for second __co_replicate peri_._od_.._... Waived for second com.pliaace period Waived for one comp!i~.nce .cycle. .. ___ WaNed for second . .~eompliance period, Waived for'second cOmPliance period .... { ' Waiver Waived for second Granted eom pliance.period_.. Waived for second , _C.0. mpl_!a'ncePeri0d....{ Page 2 of 3 .. JUN-26--01 15: 19 FI~0M:0¢WD 714-~78-3203 ID: 714 378 33~8 ~Varies Unragulat~d Or=~ic Chemicals Wari~S ......................... Varies Nonvulnerable Suscep. rib[Iity Waiver Granted Aluminum, Color, Coyer, Corros~i~, yoam~g Agents, Iron, M~g~e~e, Odaa Silver, ~iobe~b, T~bidi~, Zinc, TDS, Spec~c . Con~cta~..C~ori~, Sulfat~r~H .................· _ B~arbonat~, C~ho~te, and Hy~oxide ~l~ini~, Calci~, Magn~'ium; Sadie, Total Hardn~ .................. ..... Waived for one compliance cycle o Once ~very thr~¢ ye~s years The firsz compliance cycle (a nine-year calendar year cycl~) b~gan on January 1, 1993 and en~ on December 3 I, 2001. Within this fa-st compliant, cycle, the fast compliance p~ri0d (a ~.rce-y~ar calendar year p,riod) runs from January 1, 1993 to December 31, 1995; the second compliance p~riod from January 1, 1996 to December 3I, 1998; the third compliance period from Jauuary I, 1999 to December 31,200 I. Radioactivity · · · . .... .,: _ ~ ~17 l:~c.0~iitue'~tt--J'-''''' ~:-'..""i'. "- ii iii i 'iii','Ji,- ...... . '.."' '~ ii_ii'-if:._' ......... l'M°iii&r~i- Fi:*que~ieY*-* ............ ~ ....- [Radim:226 (ifGr°ss--Alpha >'5-p-diYL) - ' - ' '"'--" ~'-}---Fbt~r Co'~ecutffe' qu~ers"eV~ fgur' ['g~m~25'~ (if R~diim~?226 >-3 'PCi~i''~ -:-:- -- -' ~-----' ~ _}_..~.~{-~~ e0~ee~tice' q~e~ ¢'v¢5.~_~ ~'e~ [~r~m ...................... _ ........ _ ............... ' t F6~ Comecu~ve .......... , · * A s~r of fo~ eonsecu~ve qu~erIy ~oss alpha smpl~ may be substituted for memuremenm of radium 226, ~im 229 ~d urmiam. If gross alpha samples ~e ~ed, all sources found alpha of ~earer rh~ 5 pC~ mus~ detemine ~e avenge qumerly ~dium 226, m~im 228 ~d umium. Page 3 of 3 MAIN STREET MONTHLY SUMMARY OF NITRATE ANALYSIS (rog/L) ............. 1998 1999. 2000 ~a'n,~.&r~' ' 24:2 .... 0 '- 24.4 ' 0 0 25.4' - ..F.e. bruary... March 23.4 "31.2 25.4 ...Apri.! .... 24.4 ,25.3. 25.4 rM._a._y.: ........ 25.2 32.8__ 0. June 24.7 34.6 32.4 ~-a.' i.~ ........23.9 27.9 32.9 Aug.ust'~'.', '25.8 24.5- '33.2 SeP.t.e. mber. ..... 2..3..9 25.7: .. 32.8 _ _ October 24.5 24.5 33.6 N~/em'l~'~ : 26.'3 26.7 28.6 'Dec~m'i~er ' 26.6 ..... 27.4-- '28.6 ..... 17TH STREET MONTHLY SUMMARY OF NITRATE' ANALYSIS (mg/L) ............ 1998 1999~ 2000 ~'- ja~uaiy ~ 34.z¥'' -26.2 29.9 2e,5- . _ March- - 33.1 25,8 3'2,7 Ap~-il' . "~_"'¢2.9 __ 25.8 ..... 31.9" May, ...... 31,.9 .... 26.1 ...... 31.2.._ June 30.6 27,2 31.6 ~l,uly"'_'. .... - --30.1 --- 26.9'--~ 31.4" ,, August.. 24.6 27.2 28..7 September .... .2.7..2 , 29.3 -~7.8 October 27 29.8 32.4 Nov;emb'e~'~ 26,2 - ' '~'{).5 ...... 2'9.5 _ , _ ..December 26.8 ...... 3.0 , 30_-2, DISTRIBUTION SYSTEM MONTHLY.SUMMARY OF COLIFORM MONITORING (%) -, 1998 1999 ....... 2000 "- ~janua~)' ' .0 ...... 0" 0 .... February 0 0 "0" ........ March 0 0 0 ~P~i-~ ...... o "o o ..... ........ May 0 0 0 dune 0 0 0 July .... i 0 ... 0 0 August 0 0 0 - September 0 0 0 October. 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