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SUPERIOR ANALYTICAL LABORATORY, INC <br />' 1555 BURKE UNIT I • SAN FRANCISCO CA 94124 • PHONE (415) 647-2081 <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 . . 80720 DATE RECEIVED 04/04/90 <br /> CLIENT Vapor E-xtraction Technology DATE REPORTED 04/12/90 <br /> CLIENT JOB NO. Stockton VES <br /> AIR ANALYSIS by modified NIOSH 1500 FOR TOTAL HYDROCARBONS <br /> & AROMATIC VOLATILE ORGANICS <br /> I LAB # 4 <br /> SAMPLE RW-1 <br /> Analyte Vol ( L ) Front( mg ) Back( mg ) Tot ( in.- ) ( m�/m3 ) ( ppm) <br /> -------- --------- ------- ----- <br /> Benzene 10 <0 009 <0 009 <0 009 r0 9 '0 3 <br /> Toluene 10 0 . 035 <0 . 009 0 . 035 3 . 5 0 93 <br /> Ethyl Benzene 10 0 023 <0 009 0 01-13 2 3 G 53 <br /> Xylenes lf) 0 33 <0 009 0 33 33 7 6 <br /> Total Hydrocarbon 10 2 6 <0 1 2 . 6 260 ----- <br /> Method Detection L-Lmrt BTEX-0 009 mg <br /> TPH-0 1 mg <br /> QAQC SummarY <br /> MS/MSD Averac=:Ie Recovery =109% Duplicate RPD = 3 4 <br /> Edward R Moral s <br /> G La orator Manager <br /> I <br /> I <br />' OUTSTANDING QUALITYAND SERVICE <br />