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iSUPERIOR 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 ANALYSIS by NIOSH 1500 FOR TOTAL HYDROCARBONS <br /> & AROMATIC VOLATILE ORGANICS <br />' LAB # 3 <br /> SAMPLE MW-4 <br />' Analyte Vol.- ( L ) Front( mg ) Back( mg ) Tot- ( mg ) ( mg/m3 ) ( ppm ) <br /> Benzene 12 <0 . 009 <0 009 <0 . 009 X0 . 9 <0 . 3 <br />' Toluene 12 0 032 <0 009 0 . 032 3 2 0 . 85 <br /> Ethyl Benzene 12 <0 . 009 <0 009 <0 009 <0 , 9 <0 . 2 <br /> Xvlenes 12 0 . 016 <0 009 0 . 016 1 . 6 0 . 37 <br /> lieTotal Hydrocarbon 12 1 2 <0 . 1 1 . 2 120 ----- <br /> Method Detpc ion Lima t BTEX-0 . 009 Ing <br /> TPH-0 1 mg <br /> QAQC Summary <br /> MS/MSD Average Recovery = 93% Duplicate RPD = 0 <br /> Edward R. Morales <br /> Lab alt :Manager <br /> SAN FRANCISCO MARTINEZ <br /> OUTSTANDING QUALITY AND SERVICE <br />