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1'rac•e Analysts Laboratory, Inc. Telephone (510) 783-6960 <br /> 3423 Investment Boulevard 4#8 • Hayward California 94545 Facsimile (510) 783-1512 <br /> LOG NUMBER 2778 <br /> DATE SAMPLED 12/16/92 <br /> DATE RECEIVED• 12/17/92 <br /> DATE ANALYZED 12/30/92 and 12/31/92 <br /> DATE REPORTED 12/31/92 <br /> CUSTOMER: Conoco, Inc. <br />' REQUESTER- Bill Bassett <br />' PROJECT: No. 0511-41-5010-04, Stockton <br /> Sample Type: Water <br /> 1 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 ND 50 ND 50 ND 50 <br /> Modified EPA Method 8020 for <br /> Benzene ug/l 0.52 0 50 ND 0 50 ND 0.50 <br /> Toluene ug/1 ND 0.50 ND 0 50 ND 0.50 <br />' Ethylbenzene ug/l ND 0.50 ND 0.50 ND 0.50 <br /> Xylenes ug/l ND 1.5 ND 1.5 ND 1 .5 <br />' MW-30 MW-A __.. Duplicate _ <br /> Method and Concen- Reporting Concen- Reporting Concen- Reporting <br /> Const,]tugnt: Units tration _Limit tration Limit tration Limit <br /> 1 DHS Method- <br /> Total Petroleum Hydro- <br /> carbons as Gasoline ug/l 170 50 ND 50 150 50 <br /> Modified EPA Method 8020 for: <br />' Benzene Ug/l 4.7 0.50 ND 0 50 4.4 0.50 <br /> Toluene ug/l ND 0.50 ND 0 50 ND 0.50 <br />' Ethylbenzene ug/l ND 0.50 ND 0 50 ND 0.50 <br /> Xylenes ug/l ND 1.5 ND 1.5 ND 1.5 <br /> Concentrations reported as ND were not detected at or above the reporting limit <br /> Sample MW-A was analyzed 1-day beyond the 14-day holding time for this analysis <br />' A-4 <br /> Founding Member of the Association of California Testing Laboratories <br />