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City of Stockton A68101.02F <br /> July 24, 1997 Page 3 <br /> toluene, 8.2 mg/kg ethylbenzene, and 44 mg/kg total xylenes. Drawing 2 shows the <br /> approximate locations of the USTs, fuel dispensers and the diesel UST excavation. <br /> On June 1 and 2, 1994, Twiningdrilled three soil borings,gs, collected soil samples for <br /> chemical analyses, and installed three monitoring wells in the soil borings. Analytical results <br /> ' for the soil samples are summarized in Table 1. The approximate locations of the <br /> monitoring wells are shown on Drawing 2. <br /> TABLE 1 <br /> Soil Sample Analytical,Results <br /> i� June 1,. and 2, 1994 <br /> I <br /> Sample Depth B T E X TPH-G 77H-D <br /> Identifwation F3.% mg/kg mg/kg mg/kg mg/kg mg/kg mgfkg <br /> �iWl-10 10 ND ND ND ND ND ND <br /> MW1-15 15 ND ND ND ND ND i <br /> ' MW2-10 10 ND ND ND ND ND ND <br /> MW2-15 15 ND ND ND ND ND ND <br /> 100 MW3-10 10 ND ND ND IND LND ND <br /> MW3-15 15 ND ND ND ND ND 1 <br /> IL_2etection Limits For Reporting 0.005 0.005 1 0.005 0.005 1 1 <br /> FBSG = feet below site grade <br /> mg/kg = milligrams per kilogram <br /> =X = benzene, toluene,ethylbenzene,and total xylenes <br /> TPH-G = total petroleum hydrocarbons as gasoline <br /> TPH-D = total petroleum hydrocarbons as diesel <br /> ND = not detected at or above detection limit for reporting <br /> During the period from June to December, 1994, depth to groundwater was measured in the <br /> monitoring wells and groundwater elevations and groundwater flow directions were <br /> calculated based on the depth to water data. Groundwater data are summarized in Table <br />, i 2. <br /> 1 <br /> I <br /> 1 <br />