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11 August 2003 <br /> • AGE-NC Project No 96-0232 <br /> Page 3 of 15 <br /> I taken to ensure that visible air bubbles were not present in the vials after filling and capping Ground <br /> water sample containers were labeled with a sample designation, date, time, and sampler's initials <br /> I23 LABORATORY ANALYSIS OF GROUND WATER PUMP AND TREAT SAMPLES <br /> I The monthly influent and effluent grab water samples were logged on a chain-of-custody form, <br /> placed in a chilled container and transported to a California Department of Health Services(DHS)- <br /> certified laboratory for analysis for <br /> • Total petroleum hydrocarbons quantified as gasoline, diesel and motor oil (TPH-g, TPH-d <br /> and TPH-mo, respectively) by EPA Methods 3550/5030/8015C Modified, <br /> • Benzene, toluene, ethyl benzene and xylene (BTEX) by EPA Method 8021B, <br /> • Methanol, ethanol, tertiary butanol (TBA), di-isopropyl ether(RIPE), ethyl tert butyl ether <br /> (ETBE),tert amyl methyl ether(TAME),methyl tert butyl ether(MTBE), 1,2-dichloroethane <br /> (1,2-DCA) and ethylene dibromide (EDB) by EPA Method 8264B, <br /> o Total lead (quarterly sampling frequency, influent samples only) by EPA Method <br /> lie 6010/2007, <br /> Nitrate as NO3 by EPA Method 353 3 (effluent samples only), and <br /> C Aquatic toxicity (Bioassay) by EPA Method EPA 600/4-90/027F (quarterly sampling <br /> frequency, effluent samples only) <br /> Receivingwater samples were logged on a chain of custody form laced in a chilled container and <br /> p gg Y � p <br /> transported to a DHS-certified laboratory for analysis for <br /> 0 Total dissolved solids by EPA Method 160 1 (quarterly sampling frequency), and <br /> • Turbidity by EPA Method 180 1 <br /> 2 4 INFLUENT MONITORING RESULTS <br /> In accordance with the requirements of RWQCB Monitoring and Reporting Program No 5-00-119, <br /> ground water pump-and-treat influent samples were analyzed for TPH-g, TPH-d, BTEX, MTBE, <br /> methanol, ethanol, DUPE, TAME, ETBE, TBA, 1,2-DCA,EDB and total lead on(quarterly basis) <br /> Influent water samples collected on 21 April, on 14 May and on 25 June 2003 detected MTBE (by <br /> iEPA Method 8260) at concentrations of 49 micrograms per liter (µg/1), 37 µg/1 and 17 µg/1, <br /> Advanced GeoEnvironmental,Inc <br />