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TABLE 4 <br /> FIELD BLANK DATA <br /> Detection <br /> Lima 12/12/91 3130/92 <br /> TPH as gasoline (ppb) 50 nd nd <br /> 1 TPH as diesel (ppb) 50 nd nd <br /> BTEX (ppb) sw lab repon nd nd <br /> NOTES <br /> TPH - total petroleum hydrocarbons (EPA method 8015) <br /> BTEX -benzene, toluene, ethyl benzene, & xylenes (EPA <br /> method 8020) <br /> nd - none detected <br />