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• i <br /> . Page 7 <br /> Bldg Tr . . Building Trench <br /> TPH-D. . .Total Petroleum Hydrocarbons as Diesel <br /> TPH-G. . .Total Petroleum Hydrocarbons as Gasoline <br /> BTEX . .Benzene, toluene, ethylbenzene, total xylenes <br /> TOG. . .Total Oil and Grease <br /> Ppm .Parts per million <br /> ppb. .Parts per billion (1 ppm = 1 ,000 ppb) <br /> General housekeeping activities previously requested by Ms <br /> Meays were performed during March, 1994 . The activities <br /> involved the emptying and removal of drums containing well <br /> purge water, the introduction of the purge water into a <br /> storage tank located on other Pestana Trust property <br /> located across Grant Line Road at 2360 East Street , Tracy <br /> for biological degradation, the emptying of drums <br /> containing drill cuttings onto the on-site soil storage <br /> pile, and the removal of general refuse dumped at the site <br /> by unknown parties . <br /> COMPLIANCE MONITORING OF THE ON-SITE WELLS <br /> Sampling of the three on-site, 2-inch inside-diameter <br /> • groundwater monitoring wells (MW-1, MW-2 , and MW-3) was <br /> performed on December 2 , 1994 with the approval of Mr <br /> Michael Infurna of San Joaquin County PHS/EHD. <br /> Depth to water and total well depth in each of the wells <br /> were measured using an electric tape and the volume of <br /> water within each well casing was computed. Each well was <br /> then purged using a clean, disposable, polyethylene bailer <br /> until the groundwater was free of significant sand, silt , <br /> and/or other grit , and temperature, pH, and electrical <br /> conductivity readings stabilized. In this case, over three <br /> well volumes of water were removed from each well <br /> Measurements acquired attendant to sampling appear on the <br /> well monitoring forms enclosed in Appendix A. <br /> Subsequent to the purging of each well , a groundwater <br /> sample was collected in a clean, disposable polyethylene <br /> bailer. Each sample was transferred into a one--liter amber <br /> glass sample bottles and two Volatile Organic Analysis <br /> (VOA) vials . Each sample container was promptly fitted <br /> with a teflon-lined screw cap, labeled, placed on ice, and <br /> transported under chain of custody to Priority Environ- <br /> mental Labs of Milpitas , a California-state certified <br /> hazardous waste analytical laboratory Analyses were <br /> subsequently performed for Total Petroleum Hydrocarbons as <br /> Diesel (TPH-D) using EPA Methods 3510/8015 , and Total <br /> • Petroleum Hydrocarbons as Gasoline (TPH-G) , benzene, <br /> toluene, ethylbenzene, and total xylenes (BTEX) using EPA <br />