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HomeMy WebLinkAbout1998-11-09 City CouncilCity of Palo Alto City Manager’s Report TO:HONORABLE CITY COUNCIL 10 FROM:CITY MANAGER DEPARTMENT: UTILITIES DATE: SUBJECT: NOVEMBER 9, 1998 CMR:413:98 CALIFORNIA EPA’S OFFICE OF ENVIRONMENTAL HEALTH HAZARD ASSESSMENT REQUIRED REPORT ON PUBLIC HEALTH GOALS FOR DRINKING WATER REPORT IN BRIEF Provisions added to the California Health and Safety Code by the passage of the Calderone- Sher Safe Drinking Water Act of 1996, effective 1-1-97, mandated water utilities publish a report whenever contaminants exceed one or more Public Health Goals (PHG) or Maximum Contaminate Level Goals(MCLG). (MCLGs are the Federal equivalent to PHGs.) This PHG/MCLG report compares the City ofPalo Alto’s drinking water quality with the PHGs adopted by the California EPA’s Office of Environmental Health Hazard Assessment (OEHHA) and MCLGs adopted by the United StatesEnvironmental Protection Agency (USEPA). The PHG/MCLG report is intended to provide water quality information to the public, in addition to the Annual Water Quality Report mailed to each customer. This .report provides information required by law for compounds and elements detected in the Palo Alto water supply in 1997 at a level exceeding an applicable PHG or MCLG. The California Health and Safety Code requires the report contain plainly worded descriptions of the numerical health risk and the category of health risk associated with each contaminant that exceeded the PGH/MCLG. CMR:413:98 Page 1 of 13 RECOMMENDATION This is an informational report. The new law requires a public hearing for the purpose of accepting and responding to public comment on the PHG/MCLG report. The public heating may be scheduled as part of a regular Council meeting and noticed as required for a public hearing. No Council action is required. BACKGROUND Recently enacted provisions of the Califomia Health and Safety Code (Attachment 1), Calderone-Sher Safe Drinking Water Act of 1996, effective 1-1-97, specify that water utilities with more than 10,000 service connections are required to prepare a special report by July 1, 1998 if their water quality measurements have exceeded any PHGs. These are non- enforceable goals established by the California EPA’s OEHHA. The first 27 of these PHGs were adopted by OEHHA on December 31, 1997. The PHG for uranium was later withdrawn. The law also requires that where OEHHA has not adopted a PHG for a component, the water suppliers are to use the MCLGs adopted by the USEPA. Only constituents that have a California primary drinking water standard~ and for which either a PHG or MCLG has been set, are to be addressed in the special report. Staff prepared this PHGiMCLG special report in response to the mandates of the Calderone-Sher Safe.Drinking Water Act of 1996. Subsequent reports are due every three years if the water utility exceeds any of the PHG’s or MCLG’s during any three year period. This PHG/MCLG report is intended to provide water quality information to the public, in addition to the Annual Water Quality Report (Attachment 2) mailed to each water customer. Attachment 3 is a table of all regulated compounds and elements with the Maximum Contaminate Levels (MCLs) and PHGs or MCLGs. This report provides the information required by law for compounds and elements detected in the Palo Alto water supply in 1997 at a level exceeding an applicable PHG or MCLG. The report is required to include the numerical public health risk associated with the PHG or MCLG exceeded. Also in the report are the categories or types of risk to health associated with each component exceeded, the best available treatment technologies used to reduce the constituent level, and an estimate of the cost to install that .treatment if it is appropriate and feasible. DISCUSSION: All of the water quality data provided by the San Francisco Public Utilities Commission/San Francisco Water Department/Hetch-Hetchy Water Supply (SFPUC), as well as data collected from the City of Palo Alto water system in 1997, were considered for the purpose CMR:413:98 Page 2 of 13 of determining compliance with drinking water standards. The City of Palo Alto’s water system complies with all of the health-based drinking water standards and MCLs required by the California Department of Health Services (CDHS) and the USEPA; however, Palo Alto did exceed the MCLG for coliform in 1997 and the PHG for lead and copper during the .1992 household tap sampling program. PHG’s are set by the OEHHA and are based solely on public health risk considerations. Both the USEPA and CDHS adopt what are known as BATs or Best Available Technologies, which are the best known methods of reducing contaminant levels to the MCL. Costs can be estimated for such technologies; however, since many PHGs and all MCLGs are set much lower than the MCL, it is not always possible nor feasible to determine what treatment is needed to further reduce a component downward to or near the PHG or MCLG, many of which are set at zero. Estimating the costs to reduce a constituent to zerois difficult, if not impossible, because it is not possible to verify by analytical means that the level has been lowered to zero: In some cases, initiating treatment to try and further reduce very low levels of one component may have adverse effects on other aspects of water quality. The following is a discussion of elements and compounds that were detected in the Palo Alto drinking water- at levels above the PHG, or if no PHG, above the MCLG. Coliform Bacteria During 1997, staff collected between 66 and 81 water samples each month for coliform analysis. Occasionally, a sample was found to be positive for coliform bacteria, but all follow-up samples were negative. A maximum of 1.4 percent of these samples were positive in any month, well below the State MCL of 5 percent, but above the OEHHA’s MCLG of zero. The average monthly positive samples for the year was 0.23 percent. The reason for the coliform drinking water standard is to minimize the possibility of the water containing pathogens, which are organisms that cause waterborne disease. Because coliform is only a surrogate indicator of the potential presence of pathogens, it is not possible to state a specific numerical health risk. While USEPA normally sets MCLGs "at a level where .no known or anticipated adverse effects on persons would occur," it indicates that it cannot do so with coliform. Coliform bacteria are an indicator organism prevalent in nature, generally considered not harmful. They are used because of the ease in monitoring and analysis. If a positive sample is found, it indicates a potential problem that warrants investigation, so follow-up sampling CMR:413:98 Page 3 of 13 is performed. It is not at all unusual for a water system to have an occasional positive sample. It is difficult, if not impossible, to assure that a system will never get a positive sample. SFPUC delivers water to the City that has been chlorinated.. However, chlorine is added to the foothill reservoirs on an as-needed basis to assure that the water delivered is microbiologically safe. The chlorine residual levels are carefully controlled to provide the best health protection without causing the water to have an undesirable taste and odor. This careful balance of treatment is essential to continue supplying the City’s. customers with safe drinking water. Other equally important measures that have been implemented include a cross connection control program, maintenance of a disinfectant residual throughout the water system, and an effective monitoring and surveillance program. Lead and Copper There is no MCL for lead, and the State has set a secondary drinking water standard for copper of 1.0 mg/L. However the USEPA has set a standard for Action Levels (AL’s) for both lead and copper. AL’s are the triggers used to determine treatment requirements. To obtain this measurement, a sample of first drawn water, or water which has been standing in the interior piping for at least six hours, is taken from the kitchenor bathroom faucets. If the 90 percentile value of the water drawn from specifically targeted homes exceeds the USEPA AL’s of 0.015 mg/L for lead and 1.3 mgiL for copper, there is the requirement to implement additional water system corrosion control measures. Palo Alto’s sample group consisted of sixty homes built after 1982 that used copper plumbing with lead solder joints. Information provided by SFPUC for the source water indicates lead and copper values less than the established PHG’s of 0.002 mg/L and 0.17 mg/L respectively with values of less than 0.02 mg/L for lead and 0.002 mg/L for copper. During the first round oftesing at targeted homes in 1992, the Palo Alto 90th percentile value .for lead was 0.0295 mgiL, which exceeded the USEPA Action Level of 0.015 mg/L by 0.0145 mg/L and subsequent PHG. The Palo Alt0 90th percentile value for copper was 0.198 mg/lwhich did not exceed the USEPA Action Level, but did exceed the PHG. Since the USEPA Action Level for lead was exceeded in, the City was required to develop a plan that optimizes corrosion control for the system. The City joined with Santa Clara Valley Water District and several other Santa Clara County water utilities to develop a plan to optimize corrosion control, thus reducing lead and copper leeching from water customers’ interior building plumbing. Pipe loop test equipment was installed at the PaloAlto.Water CMR:413:98 Page 4 of 13 Quality Control Plant to test and evaluate various chemical treatments to determine a process to maximizecorrosion control. A plan was submitted to CDHS in conjunction with SFPUC stating the SFPUC would increase pH and alkalinity levels in the Hetch-Hetchy water supply, which would provide corrosion control to all SFPUC wholesale customers. Since that time, there have been on-going discussions between CDHS and SFPUC over regional corrosion control strategies. Currently, the City is not providing any additional corrosion control at the SFPUC connections; however, if it is determined that SFPUC is unable to provide consistent- regional treatment to all its wholesale customers, CDHS will require the City to install and maintain corrosion control equipment at each of the City’s four water receiving stations. Another round of tap sampling will be conducted in December of this year to assist CDHS in determining if corrosion control has been maximized in the SFPUC supply. Lead is considered to be a neurotoxic which is capable of causing damage to the kidneys or nervous systems in humans. Elevated lead levels in humans have also been linked to low birth weights and childhood growth reductions. The category of health risk for copper is considered to be acute toxicity, which can cause’ gastrointestinal irritation in humans. OEHHA considers lead and copper to be noncarcinogens; therefore, an exact numerical public health risk cannot be calculated. RESOURCE IMPACT: If additional corrosion control treatment facilities at the four water receiving stations is required by the CDHS, preliminary cost estimates for the capital improvement costs are $403,000 With an estimated annual Operating. & Maintenance cost of approximately $200,000. Funding, if required, will be included in future Operating and Capital Improvement Programs budgets. POLICY IMPLICATIONS: This report does not represent any changes to existing City policies. CMR:413:98 Page 5 of 13 ATTACHMENTS:. Attachment 1 Health and Safety Code 116470 (b) through (e) Attachment 2 City of Palo Alto 1997 Water Quality Report Attachment 3 Table of Regulated Constituents with MCLs, PHGs, or MCLGs Attachment 4 Glossary of abbreviations used in this report. PREPARED BY: Rodger Jensen, Manager, WGW Operations EDW,~d~D J. MRI~J~K! CITY MANAGER APPROVAL: HARRISON Assistant City Manager CMR:413:98 Page 6 of 13 ATTACHMENT 1 HEALTH AND SAFETY CODE 116470. (b) On or before July 1, 1998, and every three years thereafter, public water Systems serving more than 10,000 service cormections that detect one or more contaminants in drinking water that exceed that applicable public health goal, shall prepare a brief written report in plain language that does all of the following: (1) Identifies each contaminant detected in drinking water that exceeds the applicable public health goal. (2) Discloses the numerical public health risk, determined by the office, associated with the maximum contaminant level for each contaminant identified in paragraph (1) and the numerical public health risk determined by the office associated with the public health goal for that contaminant. (3) Identifies the category of risk to public health, including, but not limited to, carcinogenic, mutagenic, teratogenic, and acute toxicity, associated with exposure to the contaminant in drinking water, and includes a brief plainly worded description of these terms. (4) Describes the best available technology, if any is then available on a commercial basis, to remove the contaminant or reduce the concentration of the Contaminant. The public water system may, solely at its own discretion, briefly describe actions that have been taken on its 6wn, or by other entities, to prevent the introduction of thee contaminant into drinking water supplies. (5) Estimates the aggregate cost and thecost per customer of utilizing the technology described in paragraph (4), if any, to reduce the concentration of that contaminant in drinking water to a level at or below the public health goal. (6) Briefly describes what action, if any, the local water purveyor intends to take to reduce the concentration of the contaminant in public drinking water supplies and the basis for that decision. (c) Public water systems required to prepare a report pursuant to subdivision(b) shall hold a public hearing for the purpose of accepting and responding to public comment on the report. Public water systems may hold the public hearing as part of any regularly scheduled meeting. (d) The department shall not require a public water system to take any action to reduce or eliminate any exceedance of a public health goal. (e) Enforcement of this section does not require the department to amend a public water system’s operating permit. CMR:413:98 Page 7 of 13 This table lists the concentrations Of various chemical and biological parameters in Palo Alto’s water supply. By law, raw water must be tested to ensure it is free from industrial or sanitary contamination. Treated water must also meet both primary and secondary standards. Primary standards regulate substances that may affect public health. Secondary standards address aesthetic qualities such as taste and odor. The Maximum Contaminant Level (MCL) is the standard set by both state and federal govern- ments. The analysis shows that all dements detected in Palo Alto’s water supply were below state and federal MCLs during 1997. In general, these findings show that the water Polo Alto receives from the San Francisco Public Utilities Commission (SFPUC) and supplies to the community is of very high quality and safe to drink. Additionally, the water analysis shows that this water is very soft and contains few minerals. This chart is based on b~)rmation provided, in ~htrch 1998, by the San Francisco Public Utilities Comnlissilln te the CiU of Palo Alto Utilities, This information meets all of the requirements of Section 64463.1 ~( CalqD~da Domestic I~tter QuailU and ~lfimitoring Reguhttions for all peblic water qaality report to CllSIODlegs. [l also satisfies the reporting requirements )~" the U.S. Ent’ironntellt~d Protectioe Agency (USEE,D and the Cali]Drnia Department ~(Heahh Sen’ices ( DHS). ATTACHMENT 2 :::7--U PALO ALTO WATER DISTribUTION SYSTEM Maximum~enlaminant Parameter Unit Level Range Average CLARITY TurbidiU .................................................................................................NTU MICROBIOLOGICAL Total Coliform Bacteria (% of monthly samples positive) ......................Positive E. Col (# o! monthly samplespositive) .................................................Samples ORGANIC CHEMICAL: Total Trihalomethanes 0-triMs) (4) .......................................................ug/1 NORGANIC CHEMICALS Fluoride (added by City) (8) .................................................................mg/L Free Chlorine ........................................................................................mg/L 0.5 (1)0.1-1.4 0.3 5 0-1 000-1 0 100 79-93 88 1.4-2.4 0-1,2 0.9NS ¯0.1-1.0 05 SAN FRANCISCO PUCTREATED WATER ORGANIC CHEMICALS (a) Volatile Organic Chemicals (VOCs) (2) .........................................ug/L 0.5-1750 (3)<0.5 Methyl Tertiary Butyl Ether (MTBE) .......................................................ug/L NS <0.5 (b) Synthetic Organic Chemicals (SOCs) (5)Aldrin .....................................................................................................ug/L NS <0,075 Benze(a)pyrene .....................................................................................ug!L 0.2 <0,1 Butachlor. ..............................................................................................ugJL NS <0.38 Carbaryl .................................................................................................ug/L NS <5 Dicamba ................................................................................................ug&NS <1,5 Dieldrin..................................................................................................ug/L 0.02 <0.02 Dinoseb .................................................................................................ugiL 7 <2 Diquat....................................................................................................ug!L 20 <4 3-Hydro~carbofuran .............................................................................ug/L NS <3 Methomyi...............................................................................................ug/L NS <2 Metolachlor. ...........................................................................................ug!L NS <0.5 Metribuzin..............................................................................................ug/L NS <0.5 Oxamyl ..................................................................................................ug/L 200 <20 Propachler............................................................................................ug!L NS <0.5 II,IORGAN|C CHEMICALSAsbestos (a) (7) ...................................................................................MFL 7 <0.2 Aluminum............................................................................................ug~L 1000 56-157 Antimony, .............................................................................................ug/L 6 <5 Arsenic.................................................................................................ug/L 50 <2 Barium ......................................; ..........................................................ug/L 1000 2.8-7 Beryllium.............................................................................................ug/k 4 <1 Cadmium .............................................................................................ug/L 5 <1 Chromium............................................................................................ug/L 50 <2 Cyanide ....................................................................rag&0.2 <0,1 ~ead.........................................................................:::::::::::::::::::::::::::: u~L 15 (~)<2 Mercu~.......~ ........................................................................................uojl_2 <0.5 Nickel ...................................................................................................ug/t 1 O0 <3 Nitrate(as NO.q) ...................................................................................mg/l.45 <0.4 Nitrite (as N)..7. ....................................................................................mg/L 1 <0.05 Selenium ............................................................................................ug/L 50 <5 ug!L 2 <1 .~adionuclidea Total Alpha Particle .............................................................................pCi/L 15 <1 Total Beta Particle ...............................................................................pCi/L 50 <4 Strontium-90 ..........................................................................................pOlL 8 <2 Tritium..................................................................................................pOlL 20000 <1 Uranium.....: .........................................................................................pG/L 20 <2 <05<05 <0.075<0.1<0.38<5<t.5 <0.02<2<4<3<2<0.5<0.5<20<0.5 <0.2106 <5<24.9<1<1<2<0,1<2<0.5<3<0.4 <0.05<5<1 <1<4<2<! <2 Chloride ...............................................................................................mg/L 250 4.0-15 9.5 Color ....................................................................................................units 15 <1.0-11 6.0 Copper ..................................................................................................ug/L 1000 <1.0-3.4 2.0 Foaming Agent/MBAS) .......................................................................mg/L 15 <0.5 <0,5 Iron ........................................................................................................ug/L 300 <5.0-46 24 Manganese ............................................................................................ug!L 50 <3.0-3,4 2.5 Silver. .....................................................................................................ug!L 100 <1.0 Specific Conductance .................................................................umhos/cm 1600 41-207 124 Sulfate ..................................................................................................mg/L 250 0.8-14 7,4 Total Dissolved Solids (TDS) ................................................................mg/L 500 18-120 69 Zinc .......................................................................................................ug/L 5000 <5.0 <5.0 Alkaliniw (CaCOa) ..............................................................................m~NS 15-66 4! Calcium ..............................................................................................m~L NS <3.0-17 90 Hardness (CaCO3) ..............................................................................m~NS 14-66 Magnesium .........................................................................................m~L NS 0.2-7.3 3 8 pH .......................................................................................................units NS 8.8-9,6 9.1 Phosphate ..........................................................................................m~L NS <0.05 <0 05 Potassium ...........................................................................................m~L NS 0,2-0.9 06 Silica ...................................................................................................m~L NS 4.0-6.0 5.0 Sodium ...............................................................................................m~L NS <3.0-16 90 ( 11 Filte red water O. 5 ,~TU. wlfiIce red water f 0 .~Ti’. (2] SFPUC has anal3=ed addet,~mt156 VOCs, all restdts ~ere belo~ d~e de~e~non levels. (4) blcludes Othm~n~ BromoJichhm)methane. Ollorodihrom,~metfume and (5) DHS h~ appn~ved SFPUC’s request fi~r a waiver of additW~d 37 (6~ For fihers over 10 ton long. (7) Bdsed on the values medsured in I995. (,~) Fluoride standard depends ~m tem[~eralttre. (9~ Acmm level. MFL = million fibers per l#er rag/L= milligmnu per liter [p,trr ~ i’:" ":dh’ml NS = no standard pCi/L = picoCuries per liter ATTACHMENT 2 The City of Pain Alto Utilities provides an annual repor~ to the community about the quulity" of the water we deliver to your holr~es and businesses. Our policy is to inform our customers about the physical. chemical, and biological constituent standards for xvater and identify the typical concentrations found in your water. Palo Alto drinking water continues to be in complete compliance with al! existing state anti federal standards for water quality. Nearly 85% of the water ddivered to Palo Alto by the San Francisco Public Utilities Commission (SFPUCI originates from high Sierra snowmelt in 459 square miles of protected Yosemite National Park watershed kind. This pure xs at~r is stored in the Hetch Hetchy Reservoir near the Yosemite Valley. about 120 rrtiles away. It is delivered to the Bay Area through a series of tunnels and pipelines. About 15% of Palo Alto’s water comes from the Calaveras and San Antonio Reservoirs located in Alameda and Santa Claru counties, WATERSHED PROTECTION blodem water treatment practices prevent pathogens from reachin~ the consumer at eveU step oDhe water distribution process. Source protection prevents contaminants .from getting into the water at its source. CarefuI watershed management protects our source water by limiting activities to those compatible with maximum protection of water quality. The Hetch Hetchy reserxoir is so well protected that its water supply is one of six in the country that is exempt from fi hrati~m, OUALITY ASSUP&N~E Water treatment, such as disinfection or filtration, is another method of quality assurance. The SFPUC uses a v~iety of treaunent techniques depending on the water source, For example, local sources that are near populated areas are filtered to meet standards for ch~ty. All of our water is disint~cted with chlorine to meet state and federal water quality standards, In addition to testing by SFPUC, the City" of P:do Alto Utilities monitors to assure that only the highest quality of water is delivered to you. On un annual basis, pipelines ~e flushed to reduce sediment buildup. V’,’e conduct monthly generai physical measurements of the water in our distribution system for the pH, temperature, chlorine residual, conductivity, color units, and turbidity in the water, as required by the state. Fluoride and bacteriological levels are tested weekly. Bacteriological and turbidity testing are conducted in excess of state standards in order to further protect water quality in PaloAlto, Through cureful monitoring and safe operation, we will strive to deliver the highest quality of water possible to the Palo Alto community tLr another hundred years! Should I be concerned about TTI-D, Is if I am pregnant or planning to become pregnant? Two recent studies conducted by the California Department of Health Services suggest that there may be a link between miscarriages and disinfection by-products ITotal Trihalomethanes or TTHMs} in drinking water. TTI-LMs in drinking water titan when chlorine or other disinfectants -- necessary, to prevent waterbot:ne diseases -- react with naturally occurring organic matter in water. Chlorine has been used for neurly 100 years as a disinfectant for water supplies due to its effectiveness at "killing bacteriu and viruses in ~vater. The City of Palo Alto Utilities carefully monitors and supplies water which consistently meets or exceeds all current federal and state regulations fur drinking water, However, if a woman is pregnant and feels concerned about TTI-D, Is, she should contact her physician. What is Cryptosporidium? Cryptospofidium is a pathogenic organism fimnd in natural waters, it causes a diarrheal disease called cuptosporidiosis and is spread by direct and indirect contact with the feces of infected persons or animals, and through contaminated food and drinking water or swimming pools. Healthy persons are generally not at serious risk from a cryptosporidiosis infection, but it can be life- threatening to immuno-compromised individuals such as those infected with AIDS. chemotherapy patients, or organ and bone marro~v transplant recipients. Persons with serious immune system problems should consuh their health care provider for additional information on the risks and prevention. The very low occurrence of this contaminant in Palo Alt{;s drinking water is due to our highly protected watersheds both in the high Sierra and locally. What is MTBE and is it a concern in Palo Alto? Methyl tertim-y butyle ether IMTBE) is a chemical added to gasoline to promote more complete combustion and reduce emission of carbon monoxide iCO/ and organic compounds. The chemica! adds oxygen to the gasoline to increase the temperature at which it burns in the engine and reduces the amount of harmful byproducts in the vehicle’s exhaust. Currently. there m-e no regulutoW standards for this contaminant. MTBE is now being found in some shallo~v groun&vater, reservoirs and drinking water. Detection levels of this organic chemical in Palo Alto’s drinking water are significantly" below the interim "health advisor3,’" levels established by the California Department of HeaIth Services, Should I be concerned about lead in my home? Lead is a common metal found throughout the enviromnent in lead-based paint, air, soil, household dust. food. certain types of potteD’, porcelain and pewter, and water. Lead can pose a significant risk to your health if tno much of it enters and builds up in your body. The greatest risk is to young chiklren and pregnant women. The City’ of Palo Alto Utilities consistently delivers drinking water which has lead contaminant levels belo~v existing standards. If you are concerned about lead in your home, however, invest in a lead testing kit available at many hm’dware stores or contact a local v. ater testing laboratory for their services. CITY OF PALO ALTO UTILITIES In compliance with the Americans with D~sabilities Act (ADA) of 1990, this document may be provided in other accessible fl)rmats ~For information contact Fred Herman, CiD’ of Palo Nto, 650-329-2-196 (voice) or 650-328-1199 (TDD)~r pin0 GB re%c ed paper CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs ATTACHMENT 3 Page 1 PARA~[ETERS/ CONSTITUENTS UNITS STATE MCL DLR MCLG OF (PHG) CPM SFPUC SUPPLY INORGANICS ALUMINUM ANTIMONY ARSENIC ASBESTOS BARIUM BERYLLIUM CADMIUM CHROMIUM mg/L mg/L mg/L fibers/L mg/L mg/L mg/L mg/L 1 0.006 0.05 7 million 1 0.004 0.005 0.05 0.05 0.006 0.002 0.2 million 0.1 0.001 0.001 0.01 none (0.020) none* 7 million 2 0.004 0.005 0.1 0.106 <0.005 <0.002 <0.2million 0.0049 <0.001 <0.001 <0.002 CYANIDE FLUORIDE MERCURY NICKEL NITRATE [ as N ] NITRATE [ as NO3 ] NITRITE [ as N ] SELENIUM THALLIUM mg/L mg/L 0.2 1.4-2.4 0.002 0.1 10 45 1 0.1 0.1 0.001 0.01 0.4 2 0.4 (0.15) 0.o) 0.002 none (10) (45) (1) <0.1 0.9 <0.0005 <0.003 mg/L mg/L 0.05 0.002 0.005 0.001 0.05 0.0005 <.1 <0.4 <0.05 <0.005 <0.001 ORGANICS ALACHLOR ATRAZINE BENTAZON BENZENE mg/L mg/L mg/L 0.002 0.003 0.018 0.001 0.001 0.001 0.002 0.0005 (0.004) 0.003 none 0 waived ND ND ND CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs ATTACHMENT 3 Page 2 PARAMETERS/ CONSTITUENTS ORGANICS BENZO (a) PYRENE CARBOFURAN CARBON TETRACHLORIDE CHLORDANE CHLOROETHENE [VINYL CHLORIDE] CIS- 1, 2-DICHLOROETHYLENE 2, 4-D DALAPON DIBROMOCHLOROPROPANE [DBCP] 1, 2-DICHLOROBENZENE [ORTHOI 1, 4-DICHLOROBENZENE [PARA] 1, 1-DICHLOROETHANE [1,1- DCA] 1, 2-DICHLOROETHANE [!,2- DCA] 1, 1-DICHLOROETHENE [1,1- DCE] DICHLOROMETHANE 1, 2-DICHLOROPROPANE 1, 3-DICHLOROPROPENE DI (2-ETHYLHEXYL) ADIPATE DI (2-ETHYLHEXYL) PHTHALATE DINOSEB UNITS mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L STATE MCL 0.0002 0.018 0.0005 0.0001 0.0005 0.006 0.07 0.2 0.0002 0.6 0.005 0.005 0.0005 0.006 DLR 0.0001 0.005 0.0005 0.0001 0.0005 0.0005 0.01 0.01 0.00001 0.0005 0.0005 0.0005 0.0005 0.0005 MCLG o1" (PHG) (0.000004) 0.04 0 (0.00003) 0 0.07 (0.07) (0.79) 0 (0.6) (0.006) none 0.007 CPA/ SFPUC SUPPLY <0.0001 waived ND waived ND ND ND ND ND <0.0005 <0.0005 ND ND ND mg/L 0.005 0.0005 0 ND mg/L 0.005 0.0005 0 ND mg/L 0.0005 0.0005 none ND mg/L 0.4 0.005 0.4 ND mg/L 0.004 0.003 (0.012)waived mg/L 0.007 0.002 (0.014)<0.002 CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs ATTACHMENT 3 PARAMETERS/ CONSTITUENTS ORGANICS DIOXIN [2,3,7,8 - TCDD] DIQUAT ENDOTHALL ENDRIN ETHYLBENZENE ETHYLENE DIBROMIDE [EDB] GLYPHOSATE HEPTACHLOR HEPTACHLOR EPOXIDE HEXACHLOROBENZENE HEXACHLOROCYCLOPENTADI ENE LINDANE METHOXYCHLOR MOLINATE MONOCHLOROBENZENE OXAMYL PENTACHLOROPHENOL P~CLOP~W POLYCHLORINATED BIPHENYLS [PCBs] SILVEX [2, 4, 5-TP] SIMAZINE STYRENE TETRACHLOROETHYLENE IPCEI UNITS mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L STATE MCL 3x10-s 0.02 0.1 0.002 0.7 0.00005 0.7 0.00001 0.00001 0.001 0.05 0.0002 0.04 0.02 0.07 0.2 0.001 0.5 0.0005 0.05 0.004 0.1 0.005 DLR 5x10 -9 0.004 0.045 0.0001 0.0005 0.00002 0.025 0.00001 0.00001 0.0005 0.001 0.0002 0.01 0.002 0.0005 0.02 0.0002 0.001 0.0005 0.001 0.001 0.0005 0.0005 MCLG OF (PHG) 0 0.02 (0.58) 0.002 (0.3) 0 (1.0) 0 0 0 0.05 0.0002 0.04 none 0.1 (0.05) (0.0004) (0.5) 0 0.05 0.004 0.1 Page 3 CPA/ SFPUC SUPPLY waived <0.004 waived ND <0.0005 waived waived ND ND ND ND ND ND ND ND <0.2 waived waived ND ND ND ND ND CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs ATTACHMENT 3 Page 4 PARAMETERS/UNITS STATE DLR MCLG CPA/ CONSTITUENTS MCL or SFPUC (PHG)SUPPLY ORGANICS THIOBENCARB mg/L 0.07 0.0010 none ND TOLUENE mg/L 0.15 0.0005 1.0 ND TOXAPHENE mg/L 0.003 0.001 0 waived TRANS-1,2-mg/L 0.01 0.0005 0.1 ND DICHLOROETHYLENE 1,2,4-TRICHLOROBENZENE mg/L 0.07 0.0005 0.07 ND 1,1,1-TRICHLOROETHANE [1,1,1-mg/L 0.200 0.0005 0.200 ND TCA] 1,1,2-TRICHLOROETHANE [1,1,2-mg/L 0.005 0.0005 0.003 ND TCA] TRICHLOROETHYLENE [TCE]mg/L 0.005 0.0005 0 ND TRICHLOROFLUOROMETHANE mg/L 0.15 0.005 (0.70)ND [FREON III TRICHLOROTRIFUOROETHANE mg/L 1.2 0.01 (4.0)<0.0005 (FREON 13) TRIHALOMETHANES, TOTAL mg/L 0.100 0.0005 none 0.086 [TTHMs] XYLENES [SUM OF ISOMERS]mg/L 1.750 0.0005 (1.800)<0.0005 MICROBIOLOGICAL GIARDIA LAMBLIA TT zero no monitoring mandated LEGIONELLA TT zero no monitoring mandated VIRUSES TT zero no monitoring mandated CALIFORNIA MCLs AND PHGs AND FEDERAL MCLGs ATTACHMENT 3 Page 5 PARAMETERS/UNITS STATE DLR MCLG CPA/ CONSTITUENTS MCL or SFPUC (PHG)SUPPLY RADIOLOGICAL ALPHA ACTIVITY, GROSS pCi/L 15 1 none*<1 BETA ACTIVITY, GROSS pCi/L 50 4 none*<4 RADIUM 226 & 228, TOTAL pCi/L 5 1 none*N/A STRONTIUM 90 pCi/L 8 none*<2 TRITIUM pCi/L 20000 I none*<1 URANIUM pCi/L 20 2 none*<2 MCL= Maximum Contaminant Level DLR= Detection Limit for Reporting purposes: set by DHS MCLG= Maximum Contaminant Level Goal PHG= Public Health Goal TT= Treatment Techniques ND= Non-Detectable "vVAIVED= Department of Health Services does not require testing N/A= Not Applicable *=MCLGs were never finalized.