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' Z1 INC <br /> Tank 1 was found to contain a number of holes and tears on the bottom and sides The tank <br /> ' was empty of product at the time of removal A former fuel dispenser stand was located <br /> immediately adjacent to the tank but the dispenser had been removed at an earlier time <br /> ' The soil immediately under Tank 1 was found to contain significant concentrations of what <br /> appeared to be "aged" gasoline contamination The hydrocarbon contamination in the soil <br /> ' was identified in the field by characteristic odor, staining, and dark colored fuel contained <br /> within the latticework of the soil Limited exploratory trenching was conducted immediately <br /> ' under Tank 1 to a depth of 14 feet below ground surface in an attempt to confirm if an <br /> unauthorized release had occurred No soil samples were collected as it was determined <br /> ' in the field that a followup investigation would be required <br /> ' Tank 2 was removed from the subsurface and found to not contain any significant holes or <br /> tears in the sides or bottom The soil immediately under the tank was noticed to have a <br /> ' slight discoloration and odor of fuel oil The discolored soil and odor was found to be <br /> present only immediately under the tank to a distance of not more than 12 inches beneath <br /> the base of the tank A limited exploratory trenching effort to a depth of 5 feet below Tank <br /> 2 indicated that no significant soil hydrocarbon contamination was present beneath this <br /> ' tank <br /> I <br /> Because the gasoline contaminated soil found under Tank 1 was clearly contaminated, an <br /> ' unauthorized hydrocarbon release report (UAR) was filed with the San Joaquin County <br /> Public Health Services Environmental Health Division (PHSEHD) by the owners of Hi Hopes <br /> immediately after the tank removal The owners of Hi Hopes provided PHSEHD with a <br /> ' preliminaryinvestigation workplan for exploratory soil boring to determine if significant <br /> 9 P P rY 9 9 <br /> ' hydrocarbon contamination was present at the property WZI provided oversight of the <br /> initial soil boring effort <br /> 1 ' <br /> 1 <br /> ' 08220010 005 2 <br />