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1 <br /> Trac t- Analyse Laboratory, inc <br /> Telephone (510) 783-6960 , <br /> 3423 Investment Boulevard #8 • Hayward, California 94545 Facsimile (510) 783-1512 <br /> LOG NUMBER 2443 <br /> _ DATE SAMPLED: 08/24/92 <br /> DATE RECEIVED 08/27/92 <br /> DATE ANALYZED 09/04/92 <br /> DATE REPORTED. 09/11/92 <br /> CUSTOMER. Conoco, Inc. <br /> - REQUESTERS - --� — ��- Bi17 Bassett <br /> PROJECT: No 0511-41-5010-04, Stockton 1 ' <br /> Sam T e. 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 /> DWS Method: <br /> Total Petroleum Hydro- <br /> carbons as Gasoline ug/l NO 50 ND 50 NO 50 <br /> Modified EPA Method 8020 for: <br /> Benzene ug/l NO 0 50 NO 0.50 0.56 0 50 <br /> Toluene ug/l NO 0 50 ND 0 50 NO 0 50 <br /> Ethylbenzene ug/l NO 0 50 ND 0 50 ND 0 50 <br /> Xylenes ug/1 NO 1 5 ND 1 5 ND 1 5 <br /> MW-30 MW-A Duplicate <br /> Method and Concen- Reporting Concen- Reporting Concen- Reporting <br /> Constituent. Units tration Limit tratjon Limit tration Limit <br /> DHS Method <br /> Total Petroleum Hydro- <br /> carbons- as <br /> ydro-carbons- as Gasoline ug/1 320 50 ND 50- 320 50 - <br /> Modified EPA Method 8020 for ' <br /> Benzene ug/l 12 0 75 ND 0 50 11 0 75 <br /> Toluene ug/l 1 7 0 90 ND 0 50 1.7 0.90 <br /> Ethylbenzene ug/1 ND 1 0 ND 0 50 NO 1 0 <br /> Xylenes ug/l ND 2 7 NO 1 5 NO 2 7 <br /> Concentrations reported as ND were not detected at or above the reporting limit. <br /> Founding Member of the Association of California Testing Laboratories A-4 <br />