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Trace Analysis Laboratory, Inc. ' <br /> Telephone (510) 783-6960 <br /> 3423 investment Boulevard, #8 • Hayward, California 94545 Facsimile (510) 783-1512 <br /> LOG NUMBER. 1746 <br /> DATE SAMPLED. 01/28/92 and 01/29/92 <br /> DATE RECEIVED: 01/30/92 ' <br /> DATE ANALYZED: 02/06/92 <br /> DATE REPORTED: 02/18/92 <br /> CUSTOMER: Conoco, Inc. <br /> REQUESTER: Jim Lehrman ' <br /> PROJECT: No. 400511-Q19, Stockton, East Washington Street <br /> Sample Type- Water <br /> MW-27 MW-28 MW-29 <br /> Method and Concen- Reporting Concen- Reporting Concen- Reporting <br /> Constituent: Units tration Limit tration Limit tration Limit <br /> DHS Method: , <br /> Total Petroleum Hydro- <br /> carbons as Gasoline ug/l NO 50 NO 50 NO 50 , <br /> EPA Method 8020 for: <br /> Benzene ug/1 NO 0 50 NO 0.50 0.66 0.50 <br /> Toluene ug/l NO 0.50 ND 0.50 NO 0.50 <br /> Ethylbenzene ug/l NO 0.50 NO 0.50 NO 0.50 ' <br /> Xylenes ug/1 NO 1.5 NO 1 .5 NO 1.5 <br /> MW-30 MW-310 MW-A , <br /> Method and Concen- Reporting Concen- Reporting Concen- Reporting <br /> Constituent: Units tration Limit tration Limit tration Limit ' <br /> DHS Method: <br /> Total Petroleum Hydro- ' <br /> carbons as Gasoline ug/l 710 50 NO 50 NO 50 <br /> EPA Method 8020 for: <br /> Benzene ug/1 25 1.2 NO 0.50 NO 0.50 <br /> Toluene ug/l ND 1.0 NO 0.50 NO 0. 50 <br /> Ethylbenzene ug/l NO 1.2 NO 0.50 ND 0.50 ' <br /> Xylenes ug/l NO 3.2 NO 1 .5 NO 1 . 5 <br /> Concentrations reported as ND were not detected at or above the reporting limit. <br /> A-4 <br /> Founding Member of the Association of California Testing Laboratories ' <br />