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' `t'race Analysis; Laboratory, lne. Telephone (415) 783-8960 <br /> 3423 Investment Boulevard, #8 • Hayward, California 94545 Facsimile (415) 783-1512 <br /> LOG NUMBER: 1254 <br /> ., DATE SAMPLED: 8/26/91 <br /> - --•- DATE RECEIVED: 8/28/91 <br /> DATE ANALYZED: 9/09/91 <br /> DATE REPORTED: 9/17/91 <br /> 1 CUSTOMER: Versar, Inc. <br /> REQUESTER: James Jensen <br /> PROJECT: No. 6264.308, PB, Stockton <br /> Sample Type: Air <br />' #1 _ Method Blank <br /> Method and Concen- Reporting Concen- Reporting <br /> Constituent: Units tration Limit tration Limit <br />' Modified DHS Method: <br /> Total Petroleum Hydro- <br />' carbons as Gasoline mg/m3 5.2 3.4 NO 3.4 <br /> Modified EPA Method 8020 for: <br /> Benzene mg/m3 0.25 0.070 NO 0.070 <br /> Toluene mg/m3 ND 0.053 NO 0.053 <br /> Ethylbenzene mg/m3 NO 0.066 NO 0.066 <br /> Xylenes mg/m3 NO 0.22 ND 0.22 <br /> OC—Summary: <br /> % <br /> CSummary% Recovery: 76 <br />' % RPD: 21 <br />' Concentrations reported as ND were not detected at or above the reporting limit. <br /> 0 %b_1. <br /> Louis W. DuPuis <br /> Quality Assurance/Quality Control onager <br /> Founding Member of the Association of California Testing Laboratories <br /> { <br />