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i <br /> i <br /> WESTERN GEO-ENGINEERS <br /> SECTION 7.0 <br /> CHEMICAL ANALYSIS <br /> Eighteen soil samples (six from the borings and twelve from the excavations and <br /> spoil soil lies were analyzed for total petroleum hydrocarbons TPlit benzene, <br /> toluene, ethylbenzene, and xylene (® EX), with select samples analyzed for <br /> t <br /> organic lead total lead and ethylene dibromide using EPA methods 8015 2 <br /> g v 80 0 <br /> g <br /> 8010, and ASTM D3237-79. Soil sample results are shown on table 2 and are <br /> presented In miilgrams/kilogram or micrograms/kilograms (mg/kg or ug/kg). <br /> Ground water samples taken from the water entering the excavation during tank pull <br /> and from the monitor wells were analyzed for TPH, ETEX, organic lead, <br /> polychlorinated biphenyls (PCIS) and halogenated volatile organics using EPA <br /> 4 methods 601, 608, 8015 and ASTM D3237-79. The results of the laboratory <br /> analysis are found on table 3 and are presented in micrograms per liter (ug/1) or <br /> parts per billion (ppb) range and milligrams per liter or parts per million (ppm) range. <br /> Table 4 is the non certified portable laboratory results on ground water samples <br /> using the Western Geo- Engineers soil probe laboratory. The samples are from the <br /> water collected during the boring of the monitor wells, during development of <br /> monitor wells, and duplicates taken during the sampling of the monitor wells, <br /> analyzed for total volatile organics (TVG) using a Flame Ionizing Detector (FID), <br /> benzene using a photoionixing (PID) chromatograph, resistivity using a Fann <br /> resistivity meter, chloride ion using titration; flooresence using an ultra violet <br /> inspection box and vapor using a hand held PID meter. <br /> SECTION 7.1 <br /> PRODUCT LOSS <br /> Examination of the tanks by Walton Engineering, during and after the removal <br /> operation revealed no obvious leaks. The soil around and under the tanks was not <br /> stained or discolored. According to Desert Petroleum, the inventory records and <br /> recent tank tests indicate no product loss (see appendixes E and D respectively). <br /> it must be surmised that any release of product had been from overspill during <br /> delivery. <br /> page 32 <br />