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u <br /> below analytical detection limits in all wells except MW3 and <br /> MW2• Hydrocarbons were still present at MW3, but at signifi- <br /> cantly lower levels than those recorded in previous samplings. <br /> Benzene concentration in particular had dropped by an order of <br /> magnitude, to 0. 12 mg/L. EA's well gauging has shown no evidence <br /> of free product in any of the wells. <br /> 3.4 SOIL CHEMISTRY <br /> s Soil samples were collected during well drilling and analyzed for <br /> M <br /> fuel constituents (GTI 1986, 1987 ). Soil samples from MW3 con- <br /> tained very low levels of benzene, toluene, xylenes, and total <br /> petroleum hydrocarbons (Table 3 ) . Soil sampies from MW4 and MW5 <br /> ' contained no concentrations greater than the detection limits of <br /> benzene, toluene, xylenes, or total petroleum hydrocarbons (Table <br /> 3) The soil vapor assessments conducted by EA in November and i <br /> December 1987 examined soils throughout the site at depths of cin f <br /> ' to 23 feet without detecting measurable levels of benzene, <br /> toluene,- or xylene (EA 1988) Sampling locations were -located in <br /> former product Line trenches, near former pump islands: and <br /> n around ,the " former tank field---areas where evidence of contami- <br /> nation would be most likely. <br /> sm <br /> i <br /> e25/71050/txt q <br /> 1 <br />