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• fipH-D Total Petroleum Hydrocarbons as Diesel <br /> TPH-G Total Petroleum Hydrocarbons as Gasoline <br /> BTEX Benzene , toluene, ethylbenzene , total xylenes <br /> Ppm Parts per million <br /> ppb Parts per billion ( 1 Ppm = 1 , 000 ppb) <br /> N D Not detected above method detection limit <br /> Table 2 <br /> Analytical Results of Grab Water Samples Acquired <br /> at 2360 East Street , Tracy, CA <br /> March, 1994 <br /> TPH-D TPH-G B T E X <br /> Sample No (ppb) (ppb) (ppb) <br /> ------- ---------------------------------------------------- <br /> EP-1 N D 320 000 460 680 900 1400 <br /> EP-2 81 84 , 000 360 170 480 1100 <br /> EP-3 N D 1500 3 1 4 4 9 . 1 9 9 <br /> EP-4 N D 710 , 000 1500 1200 1000 3600 <br /> ------- ---------------------------------------------------- <br /> . Method <br /> Detection 50 100 0 5 0 5 0 5 0 . 5 <br /> Limit <br /> ----------------------------------------------------------- <br /> TPH-D Total Petroleum Hydrocarbons as Diesel <br /> TPH-G Total Petroleum Hydrocarbons as Gasoline <br /> BTEX Benzene , toluene, ethylbenzene, total xylenes <br /> ppb Parts per billion <br /> N D Not detected above method detection limit <br /> QUARTERLY COMPLIANCE MONITORING OF THE ON-SITE WELLS <br /> Sampling of the three on-site , 4-inch inside-diameter <br /> groundwater monitoring wells (MW-1 , MW-2 , and MW-3 ) was <br /> performed on August 31 , 1994 with the approval of Mr <br /> Michael Infurna of San Joaquin County Public Health <br /> Services , Environmental Health Division (PHS/EHD) <br /> Depth to water and total depth of each of the wells were <br /> measured using an electric tape and the volume of water <br /> within each well casing was computed Each well was then <br /> purged using bundles of clean, disposable , polyethylene <br /> bailers until the groundwater was free of significant sand , <br /> silt , and/or other grit , and temperature, pH , and <br /> • electrical conductivity readings stabilized In this case , <br /> Page 5 <br />