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Exton CoZpaay USA <br /> 202/225-2745.02 <br /> August 21 . 1987 <br /> drilling of the boring for MW3 indicate this decreased presence <br /> with depth. Soil samples taken from the bottom of the tank pit <br /> excavation indicate the presence of hydrocarbon components in <br /> levels 'that ranged from 39 ppm to 4600 ppm. Analyses of soils <br /> from the recently completed monitoring wells 4 and 5 recorded <br /> total hydrocarbon concentrations of less than 0.5 ppm. Table 2 <br /> summarizes the test results and A <br /> ' ppendis III contains the <br /> laboratory report . <br /> 1 <br /> TABLE 2 <br /> SOIL SAMPLE ANALYSIS RESULTS <br /> (in ppm <br /> Sample Sample Total Petroleum <br /> ID <br /> Depth ft <br /> — ) Hudrocarbor,s Benzene Toluene xylene <br /> bIW4 < 0.5 <br /> 45 < 0. 5 < [ 0.5 <br /> MW5 45 < 0.5 < 0:5 < 0. 5 < 0.5 <br /> - ` <br /> Laboratory analyses of water samples recorded: detectable ! <br /> concentrations of dissolved hydrocarbons in the <br /> five. tvells. . The I <br /> coficentrations of total hydrocarbons in the wells ranged from 4. 2 <br /> ppb in monitoring' well 5 to 2','53 ppb in maaitoring well 3.. The f <br /> S laboratory test results are summarized in Table 3 and the <br /> laboratory re',port is a } <br /> § Pre.s..ented.. in .Appendi.x_ Ill ....._ <br /> tf �, <br /> . 13 <br /> kik <br /> 7 7- W - - <br /> yF <br />