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' `1'race Analysis Laboratory, Inc. Telephone (415) 783-6960 <br /> 3423 Investment Boulevard. #8 • Hayward, California 94545 Facsimile (415) 783-1512 <br /> r rr.r r w <br /> — --------- LOG NO. : 1089 <br /> DATE SAMPLED: 7/5/91 <br /> DATE RECEIVED: 7/9/91 <br /> DATE ANALYZED: 7/11/91 <br /> DATE REPORTED: 7/12/91 <br />' <br /> CUSTOMER: Versar, Inc. <br /> REQUESTER: James Jensen <br /> PROJECT: No. 6264.308.02, PB Stockton <br />' Sa ple e: Air <br /> #1 Method B a <br /> Method and Concen- Reporting Concen- Reporting <br /> Constituent: Units tration Limit tration _Limit <br /> Modified DHS Method: <br /> Total Petroleum Hydro- <br /> r carbons as Gasoline mg/m3 9.3 7.0 ND 7.0 <br /> Modified EPA Method 8020: <br /> Benzene mg/m3 0.028 0.020 NO 0.020 <br /> Toluene mg/m3 0. 11 0.020 NO 0.020 <br /> Xylenes mg/m3 0.094 0.060 NO 0.060 <br /> Ethylbenzene mg/m3 0.039 0.020 ND 0.020 <br /> QC. Summary <br /> % Recovery: 88 <br /> RPD: 4.8 <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 /> r <br /> Founding Member of the Association of California Testing Laboratorios <br />