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' The pump used to purge and sample the wells was thorou <br /> • ghl y cleaned prior to each use by placing it into a <br /> container of tap water and washing the outside ofthe pump The disposable hose was discarded after purging <br /> each well <br /> Purge water from the monitor well MW-3A, MW-4., MW-6, MW-7 and MW-9 was stored in 55- gallon <br /> drums The drummed water will be transferred to the project holding tank during the next sampling The <br />' water currently in the project tank was previously sampled and meets the requirements for discharge to the <br /> project sanitary sewer Therefore, the tank water will be discharged to the sanitary sewer under a permit <br /> from the City of Stockton Department of Municipal Utilities prior the next quarterly sampling event Purge <br />' water from MW-2 and MW-2A was stored in 55-gallon drums in the garage located at 100 N Hunter Street <br /> and meets the requirements for transfer and disposal at a licensed treatment facility <br /> The groundwater samples were analyzed by EPA Method 8020 for BTEX and b EPA <br /> y Method 8015M for <br /> TPH-G Groundwater sample analyses were performed by Sequoia Analytical Laboratory in Walnut Creek, <br />' California <br /> 3.0 MONITORING RESULTS SUMMARY <br /> 3.1 GROUNDWATER PHYSICAL CHARACTERISTICS AND POTENTIOMETRIC <br /> SURFACE ELEVATIONS <br />' Table 3-1 presents a summary of groundwater parameters, depths and elevations Since groundwater <br /> elevations were last taken in April, 2002 groundwater elevations have decreased by an average of 0 50 feet <br /> 1 <br /> I <br /> IL\PR0IECTs4sAN]0Q\HSA\2Q02RPT WPD 3 <br />