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1 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 DATLO REPORTED 01/09/90 <br /> CLIENT JOB NO. <br />' AIR ANALYSIS by NIOSH 1500 FOR TOTAL HYDROCARBONS <br /> & AROMATIC VOLATILE ORGANICS <br /> LAB 11 2 <br /> SAMPLE RW-1 <br /> Analyte Vol . ( L ) Front ( mg ) Back( mg ) Tot- ( mg ) (m-./m3 ) ( PPm ) <br /> Benzene 10 <0 . 009 <0 009 <0 . 009 <0 . 9 <0 3 <br /> Toluene 10 0 090 <0 . 009 0 . 090 9 0 2 . 4 <br /> Ethyl Benzene 10 <0 009 <0 009 <0 . 009 <0 9 <0 . 2 <br /> Xylenes 10 0 . 015 <0 009 0 . 015 1 . 5 0 35 <br /> ITotal Hydrocarbon 10 2 . 2 <0 1 2 2 220 ---- <br /> • <br /> Method Detection limit BTEX-0 009 nig <br /> TPH-0 1 mg <br /> QAQC Summary <br /> IMS/MSD Average Recover- = 93% Duplicate RPD = 0 <br /> IEdward R. Morales <br /> Lab 71 <br /> I <br /> SAN FRANCISCO MARTINEZ <br /> OUTSTANDING QUALITY AND SERVICE <br />