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1 <br />' The pump used to purge and sample the wells was thoroughly cleaned prior to each use by placing it into a <br /> . container oftap 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-9 was stored in the holding tank When full,the water in this tank <br />' will be sampled and if deemed acceptable will be discharged to the sanitary sewer under a permit from.the <br /> City of Stockton Department of Municipal Utilities Purge water from MW-2 and MW-2A was stored in 55- <br /> gallon drums in the garage located at 100 N Hunter Street Purge water from MW-2 and MW-2A will be <br /> disposed of at a licensed treatment facility <br /> The groundwater samples were analyzed by EPA Method 8020 for BTEX and by EPA 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 /> 31 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 on February 5, 2002 groundwater elevations have increased by an average of <br /> 0 15 feet <br /> Table 3-1 <br />' Groundwater Parameter, Depth, and Elevation Data <br /> Top of Depth <br /> Conduc- Casing to April 17, 2002 <br /> Temp tivity Elevation Water Water Elevation <br /> Weli (°C) pH (µMHOS) (ft MSL) (ft) (ft MSL) <br /> MW-2 2280 690 3,180 NM 2810 NM <br /> MW-2A 2261 701 2,425 1191 2815 -1624 <br /> MW-3A NM NM NM 1123 2760 1 -1637 <br /> MW-4 NM NM NM 1346 2902 -1556 <br /> MW-5 NM NM NM 1283 2791 -1508 <br /> LIPR0J$CMSAW0Q5HSA%1Q01"T WPD 3 <br /> I <br />