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V <br /> a <br /> A S S O C I A T E S I N C <br /> Monitoring well MW1 was purged a minimum of three well volumes and until the stabilization <br /> of electric conductivity, pH, and temperature was observed. Subsequent to purging, groundwater <br /> was sampled and transferred to appropriate sample containers, using a clean, disposable bailer <br /> with a bottom-emptying device to reduce volatilization. Sample containers were then Iabeled <br /> with sample identification, placed on ice, and shipped under chain-of-custody to Sequoia <br /> Analytical. Field development/purge logs are presented in Attachment 1. <br /> Laborato!Ey Analysis <br /> The groundwater sample from well MW 1 was analyzed by Sequoia Analytical for total <br /> petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes <br /> (BTEX) by EPA Method 8015/8020, and oxygenates fuel additives by EPA method 8260. <br /> Laborato Results <br /> TPHg, toluene, ethylbenzene, and xylenes were detected above the laboratory method detection <br /> limits. No other gasoline constituents or oxygenate fuel additives were reported above their <br /> respective laboratory method detection limits. <br /> Analytical results are summarized in Table 2. Laboratory data sheets and chain-of-custody <br /> documentation are provided in Attachment 2. <br /> If you have any questions, please contact our office at(209) 579-2221. <br /> Respectfully Submitted, <br /> ATC Associates Inc. <br /> Tom J. Lutterman, REA <br /> Project Manager JEMNE <br /> Jeanne Homsey, P. E. <br /> CIVIL <br /> CA Registered Civil Engineer No. C 47410 <br /> Attachments <br /> cc: Mr. Butch Schmidt, Stockton Unified School District <br /> Mr. Marty Hartzell, RWQCB <br /> w:117292.0002Veportsl1 q=2000.doc 2 <br />