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' The pump used to purge and sample the wells was thoroughly cleaned prior to each use by placing it into a <br /> . container of tap water with non-phosphate detergent and washing the outside of the pump The disposable <br /> hose was discarded after purging each well <br /> Purge water from monitor well MW-9 was stored in the holding tank Purge water from MW-2 and MW-2A <br /> was stored in 55-gallon drums in the garage located at 100 N Hunter Street and meets the requirements for <br /> transfer and disposal at a licensed treatment facility <br /> 1 <br /> The groundwater samples were analyzed by EPA Method 8020 for BTEX and by EPA Method 8015M for <br />' TPH-G In addition the holding tank water sample was analyzed for MTBE by EPA Method 8021 <br /> Groundwater sample analyses were performed by Sequoia Analytical Laboratory in Sacramento,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 December 2002, groundwater elevations have decreased by an average of 0 48 <br /> ft <br /> r <br /> • <br /> L1PRQtECMSANJ0QVMA11Q03RFr WM 3 <br />