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S,-" <br /> MIS1 "I" - <br /> 'Lave AFU1Ey,'JS Lubor;rlUry,Ill'% Telephone (4 15)783-G9Go <br /> 3423 Investment Boulevard,98 • Hayward,California 94545 Falamdlc (415 783.1512 <br /> _ — LOG NO.: 9748 <br /> DATE SAMPLED: 4/05/91 <br /> DATE RECEIVED: 4/08/91 <br /> DATE ANALYZED: 4/10/91 <br /> DATE REPORTED: 4/22/91 <br /> CUSTOMER: Conoco, Inc. <br /> REQUESTER: Joe De Biaso <br /> PROJECT: No. 1088 R-4, Stockton <br /> Sam le Type: Air <br /> 1-1 Method Blank <br /> Method and Concen- Reporting Concen- Reporting <br /> Constitueat: Units tration Limit tration Limit <br /> Modified DHS Method: <br /> Total Petroleum Hydro- <br /> carbons as Gasoline mg/m3 4,100 200 NO 3 <br /> Benzene mg/m3 22 4 NO 0.08 <br /> Toluene mg/m3 68 4 NO 0.08 <br /> Xylenes mg/m3 170 10 NO 0.2 <br /> Ethylbenzene mg/m3 18 4 NO 0.08 <br /> C Summary: <br /> % Recovery: 103 <br /> % RPA: 9.6 <br /> Concentrations reported as NO were not detected at or above the reporting limit. <br /> Louis W. DuPuis <br /> Quality Assurance/Quality Control Manager <br /> Founding Member of She Association of California Testing Laboratories <br />