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r r <br />' SUPERIOR ANALYTICAL LABORATORY INC. <br /> 825 ARNOLD,STE 2 • MARTINEZ, CALIFORNIA 94553 • (415) 229-1512 <br />' C E R T I F I C A T E O F A N A L Y S I S <br /> LABORATORY NO . 80434 DATE RECEIVED 01/05/90 <br />' CLIENT Vapor Extraction Technology DATE REPORTED- 01/09/90 <br /> CLIENT JOB NO . <br />' AIR ANALYSTS by NIOSH 1500 FOR TOTAL HYDROCARBONS <br /> & AROMATIC VOLATILE ORGANICS <br />' LAB * 1 <br /> SAMPLE MW-1 <br /> fAnalyte 'vol .- ( L ) Front (mg ) Back(mg ) Tott- rmg ) (mg/m3 ) ( ppm ) <br /> Benzene 10 0 21 <0 . 009 0 . 21 21 6 . 6 <br />' Toluene 10 0 14 <0 . 009 0 14 14 3 7 <br /> Ethyl Benzene 10 1 . 3 <0 . 009 1 3 130 30 <br /> Xvlenes 10 5 9 <0 . 009 5 9 590 140 <br /> Total Hvdrocarbon 10 48 <0 . 1 48 4800 ---- - <br /> Method Detection Limit BTEX--0 009 mg <br /> TPH-0 . 1 mg <br /> IQAQC Summary <br /> MS/MSD Average Recovery = 93% Duplicate RPD = 0 <br /> Edward R. Mor- 'les <br /> f <br /> /Jr �f <br /> Lab ato 'v Manager <br /> SAN FRANCISCO MARTINEZ <br /> OUTSTANDING QUALITYAND SERVICE <br />