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i <br /> 17 June 2002 <br /> AGE-NC Project No 99-0559 <br /> IPage 3 of 7 <br />' from purged wells MW-SA through MW-8E utilizing 3/8-inch diameter polyethylene tubing The <br /> ground water samples were transferred into one 1-liter amber bottles without a preservative and into <br /> three 40-ml EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a sample <br /> preservative, care was taken to ensure that visible air bubbles were not present in the vials after <br /> filling and capping Ground water sample containers were properly labeled, placed in a chilled <br /> container and transported under chain-of-custody protocol to CalTech Environmental Laboratories <br /> I (CTEL), a California Department of Health Services-certified laboratory, for analysis The ground <br /> water samples were analyzed for the following <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Method 8015 Modified, <br /> • Benzene,toluene,ethylbenzene and xylene(BTEX)and methyl tertiary-butyl ether (MTBE) <br /> in accordance with EPA Method 8020, and <br /> • Fuel additives, including tertiary butanol (TBA), di-isopropyl ether(DIPE), ethyl tert-butyl <br /> ether (ETBE) and tert-amyl methyl ether (TAME), MTBE, methanol, ethanol, ethyl- <br /> dibromide(EDB) and 1,2-dichloroethane(1,2-DCA)in accordance with EPA Method 8260 <br /> I . Modified <br /> I23 FREE PRODUCT REMOVAL <br /> During the quarter,free-product was recovered in well MW-2 using a passive skimmer deployed in <br /> Ithe well After removal, the water and free product were stored on-site in 55-gallon DOT H-17 <br /> storage drums The removal was performed in a accordance with California Underground Storage <br /> Tank Regulations, Article 5, Section 2655 <br /> I <br /> I3.0. FINDINGS <br /> Ground water elevation, flow direction and gradient were determined from field data collected on <br /> 05 March 2002,the contaminant Impact to ground water was quantified by laboratory analysis of the <br /> ground water samples <br /> 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> The elevation of ground water in each monitoring well was calculated by subtracting the depth to <br /> ground water from the surveyed casing elevation, current and historical ground water elevation <br /> results are provided in Table 1 Each ground water elevation is grouped according to the HU or HUs <br /> Advanced GeoEnvironmental,Inc <br /> I <br />