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�.N <br /> 'i'rarc:/�Elal�:til:r �,:E1111C:E1lIf'►',[tic. Tr.Ioptioron{41fi1 71}a-GaGQ <br /> 3423 Invesiment f3onlovard,08 • 1laywartl,California 94545 Facsnniln(415)7lS:3-1517 <br /> LOG NUMBER: 9854 <br /> DATE SAMPLED: 5/06/91 <br /> r DATE RECEIVED: 5/10/91 <br /> DATE ANALYZED: 5/20/91 <br /> DATE REPORTED: 5/2.4/91 <br /> CUSTOMER: Conoco, Inc. <br /> REQUESTER: Joe De Biaso <br /> PROJECT: No, 1088 R-4, Stockton <br /> Samplti pe: Air <br /> I- Method Blank <br /> Method and Concen- Reporting Concen- Reporting <br /> Constituent: Units tration Limit tration Limit <br /> Modified DNS Method: <br /> Total Petroleum Hydro- <br /> r: carbons as Gasoline mg/m3 33,000 50 ND 0.1 <br /> Benzene mg/m3 380 20 NO 0.03 <br /> Toluene mg/113 860 10 ND 0.02 <br /> Xylenes mg/m3 6,100 40 NO 0.08 <br /> Ethylbenzene mg/m3 550 10 NO 0.02 <br /> Concentrations reported as NO were not detected at or above the reporting limit. <br /> C Summa—rv: -- <br /> 9a Recovery: 121 <br /> % RPD: 6.3 <br /> Louis <br /> W. DuPuis <br /> l Ma <br /> Quality Assurance/Quality Contra Hager <br /> Founding Mombor of the Association of California Testing Labaralor' <br />