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I <br /> April 2005 Monthly Tragi •r Water Self Monitoring Report -1707C <br /> Canepa's Car Wash, Stockton, CA <br /> Page 2 <br /> LABORATORY ANALYTICAL RESULTS <br /> A treated water sample collected from the final discharge point was delivered under chain-of-custody to <br /> Argon Laboratories, of Ceres, California (Argon) . The sample was analyzed for pH, Oil and Grease, <br /> Benzene, Toluene, Ethyl-benzene, Xylene (BTEX), Methyl-t-Butyl Ether (MTBE), Di-Isopropyl Ether <br /> (DIPE), Ethyl-t-Butyl Ether (ETBE), t-Amyl Methyl Ether (TAME), and t-Butyl Alcohol (TBA) . The <br /> treated water final discharge laboratory analytical methods results, reporting limits and discharge limits <br /> are presented in Table 2, below. Laboratory certificates of analysis and the chain-of-custody record are <br /> included in Attachment A. <br /> Table 2 - Treated Water Monitoring Laboratory Analytical Results <br /> CONSTITUENT Monitoring Event Current SII <br /> Sample Date 4/4/05 <br /> Lab Field* <br /> Analytical _ Reporting Discharge <br /> Method Limit/Units Limit/Units <br /> Oil and Grease EPA 1664 5 mg/L 100 mg/l <5.0 mg/L <br /> Benzene EPA 8260B 0.5 µg/I 0.5 mg/l <0.5 µJI <br /> Toluene EPA 8260B 0.5 µg/I Total <0.5 µJI <br /> Ethyl Benzene EPA 8260B 0.5 µJI Including benzene <0.5 µg/1 <br /> Xylenes EPA 8260B 1 .0 µg/l 4.57 mg/l <1 .0 µg/I <br /> MTBE EPA 8260B 0.5 µg/I ND <0.5 µJI <br /> DIPE EPA 8260B 0.5 µJ1 ND <0.5 µJI <br /> ETBE EPA 8260B 0.5 µg/1 ND <0.5 µJI <br /> TAME EPA 8260B 0.5 µg/l ND <0.5 µJI <br /> TBA EPA 82608 5.0 µJI No <5.0 lLg/l <br /> Cadmium EPA 200.7 0.005 mg/1 2.0 mg/l NT <br /> Chromium EPA 200.7 0.01 mg/l 5.0 mg/l NT <br /> Copper EPA 200.7 0.01 mg/l 6.0 mil NT <br /> Lead EPA 200.7 0.01 mgA 2.0 mg/l NT _ <br /> Nickel EPA 200.7 0.01 mg/l 5.0 mg/l NT <br /> Zinc EPA 200.7 0.02 mil 7.0 mg/l NT <br /> Total Toxic Organics EPA 624 and 0.5-100 mil Total = 4.57 mg/l NT <br /> 625 Benzene = 0.5 mg/l <br /> pH (lab: field*) 4500 H Std. Units 5-10 9.5 9.21 <br /> Units: Analytical: <br /> mg/L = milligrams per liter parts per million (ppm) B, T, E, X = benzene, toluene, ethyl benzene, total xylenes <br /> µg/L = micrograms per liter = parts per billion (ppb) TPH-G = total petroleum hydrocarbons quantified as gasoline <br /> Gasoline oxygenates/additives = methyl tertiary-butyl ether (MTBE), tertiary- <br /> butanol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETRE), <br /> tertiary-amyl methyl ether (TAME) <br /> NT= not tested during this monitoring event <br /> * = Groundwater Field Measurements for pH <br /> FUTURE WORK <br /> Continue monthly self-monitoring of the site through cessation of the groundwater treatment project or as <br /> deemed necessary by the Client or MUD. <br /> � 1� CONDOR <br />