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i <br /> sui urface investigation Results <br /> 6131 Pacific Ave., Stockton, G. <br /> Aegis Project No. 40.020 <br /> Page 13 <br /> 316 EXPLORATORY SOIL BORINOS <br /> Soil boring B-1 was drilled to determine the depth of ground <br /> water beneath the site. PID readings of samples recovered from <br /> soil boring B-1 did not indicate the presence of petroleum <br /> hydrocarbons. Soils samples were not analyzed from soil boring B- <br /> 1. <br /> Soil baring B-6 was drilled to a depth of 46 feet below grade to <br /> assess the potential for horizontal migration of petroleum <br /> hydrocarbons in soil. Four soil samples recovered from B-6 were <br /> submitted for analysis. Soil samples B6/2 (101) and $/6 (301) <br /> ` contained low levels of toluene, ethyl benzene and xylenes. The <br /> remaining soil samples did not contain petroleum hydrocarbons <br /> above detection limits. <br /> Soil boring B-7 was drilled to determine the potential for off <br /> -- site migration of petroleum hydrocarbons in soil. Three soil <br /> samples recovered from B-7 were submitted for analysis. All three <br /> samples contained low levels of hydrocarbon constituents. <br /> Soil boring B-8 was advanced to determine presence of petroleum <br /> hydrocarbons along the product lines and to determine the i <br /> f i potential of horizontal migration of petroleum hydrocarbons in ' <br /> sail from the original tank basin. Two. soil:.samples recovered <br /> i from B-8 were. submitted for analysis. Both samples contained <br /> levels of TPH -above detection limits. <br /> I 7� <br /> fz <br /> H <br /> 4, � <br />