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m . <br /> r a <br /> ll� _ <br /> 1 <br /> a;;,4 <br /> LABORATORY TESTING RESULTS <br /> 19 since the on-site soils appeared to be "contaminated", samples <br /> i with the most contamination, according to the field meter, from <br /> each test boring were selected for total hydrocarbon analysis. <br /> Samples taken within the area of original underground tanks and <br /> at the interface between native soil and tank backfill were also <br /> selected for hydrocarbon analysis. Presented below are results <br /> i' of total petroleum hydrocarbons tests performed on soil samples <br /> i ' obtained from the project site. A copy of the test results from <br /> �a <br /> the analytical laboratory is also attached. <br /> i <br /> Sample # Boring5 Depth <br /> p th <br /> Gasoline and Diesel Fuel <br /> )` ConcentrationmgLknl <br /> F <br /> SAMPLE r 1 TB-1 P 2.0' <br /> 196 ** <br /> 14 SAMPLE # 2 TB-] @ 10.D' None Detected (EPA 8015) <br /> 11 SAMPLE # 3 TB-1 @ 15.0' None Detected (EPA 8015) <br /> SAMPLE # 4 TB-3 A 2.0' <br /> SAMPLE 5 TB-3 15.0, None Detected (EPA 8015) <br /> SAMPLE. ,# 6 TB-3 @ 20.0' None Detected (EPA 8015) <br /> None Detected (EPA 8015) <br /> Note: "None Detected" at <10 mg/kg <br /> C4 - C12 Gasoline Scan <br /> to <br /> �yv <br /> DISCUSSIONS AND CONCLUSIONS <br /> Based on the results of total hydrocarbon concentration analysis, <br /> it appears that the highest concentration at 196 mg/k <br /> from <br /> soils sampled in test boring TB-1 at a ,depth of 2feet sbelow <br /> existing grade. Though vapor detector has registered some <br /> reading on other samples taken at greater depths during field <br /> i exploration, only that particular sample had shown measurable <br /> H concentration by laboratory testing. All other selected soil <br /> samples from test boring TB-3- had__"non-detected" -results base--on <br /> 30 mg%kg detection limit. <br /> 4 <br /> LIM <br />