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• 30 January 2004 <br /> AGE-NC Project No 96-0232 <br /> Page 3 of 15 <br /> On 06 November, 19 November and 09 December 2003, samples of ground water were collected <br /> from valved sampling ports located pre-treatment (influent) and post-treatment (effluent) of the <br /> pump-and-treat system In addition,water samples were collected from the receiving water sampling <br /> station located in the conveyance ditch approximately 80 feet downstream (R-2) of the point of <br /> discharge, the R-2 location was approved by the RWQCB during a site inspection on <br /> 22 November 2000 <br /> The grab water samples were collected from influent,effluent and receiving water locations utilizing <br /> 1-liter amber bottles, 1-gallon plastic dugs without a sample preservative and 40-m1 EPA-approved <br /> VOA vials containing 0 5 ml 18% hydrochloric acid as a sample preservative Care was taken to <br /> ensure that visible air bubbles were not present in the vials after filling and capping Ground water <br /> sample containers were labeled with a sample designation, date, time, and sampler's initials <br /> 2 3 LABORATORY ANALYSIS OF GROUND WATER PUMP AND TREAT SAMPLES <br /> 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 /> C 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 /> 0 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 8260B, <br /> ® Total lead (quarterly sampling frequency, influent samples only) by EPA Method <br /> 6010/2007, <br /> C Nitrate as NO3 by EPA Method 353 3 (effluent samples only), and <br /> 0 Aquatic toxicity (Bioassay) by EPA Method EPA 60014-90/027F (quarterly sampling <br /> frequency, effluent samples only) <br /> Receiving water samples were logged on a chain of custody form, placed in a chilled container and <br /> transported to a DHS-certified laboratory for analysis for <br /> G Total dissolved solids by EPA Method 160 1 (quarterly sampling frequency), and <br /> io Turbidity by EPA Method 180 1 <br /> Advanced GeoEnvironmental,Inc <br />