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1 , <br /> Street Pending laboratory analysis by EPA Method 8015B/8021 B for BTEX,TPH-g,methyl tertiary butyl <br /> ether (MTBE), dl-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether <br /> (TAME),and tertiary butyl alcohol(TBA),the holding tank water is periodically discharged to the sanitary <br /> sewer <br />' 3.0 MONITORING RESULTS SUMMARY <br /> 3 1 Groundwater Physical Characteristics and Potentiometric Surface Elevations <br /> Table 3-1 presents a summary of groundwater parameters, depths and elevations Compared to prior <br />' groundwater elevations, water levels have increased by an average of 1 23 feet since December 2004 <br /> Table 3-1 <br /> Groundwater Parameter, Depth, and Elevation Data <br /> San Joaquin County Human Services Agency <br /> March 2005 <br /> Top of <br />' Average Average Casing Depth to March 2005 <br /> Temp. Average Conductivity Elevation Water Water Elevation <br /> Well °C PH (MS/cm) feet MSL feet feet MSL <br /> MW-2 2058 752 1 28 NM 31 07 NM <br /> MW-2A 2034 748 1 53 1 1 91 3089 -1898 <br /> MW-3A NM NM NM 1123 3051 -1928 <br /> MW-4 NM NM NM 1346 3161 -18 15 <br />' MW-5 NM NM NM 1283 2976 -1693 <br /> MW-6 NM NM NM 13 17 3096 -1779 <br />' MW-7 NM NM NM 13 14 32 59 -1945 <br /> MW-8 NM NM NM 1376 33 13 -1937 <br /> MW-9 1905 665 198 1226 31 27 -1901 <br />' °C=degrees Celsius <br /> mS/cm=rmcrostemens per centimeter <br /> MSL=mean sea level <br />' NM=not measured <br /> A potentiometnc contour map developed from the water level data is presented in Figure 3-1 As in previous <br />' sampling rounds,the water table is characterized by a northeast-southwest trending trough Groundwater <br /> flow is toward the center of the trough at a gradient of 0 010 feet/foot <br /> 3 <br />