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rt <br /> SUPERIOR ANALYTICAL LABORATORIES, INC. 14ARDIING ASSOC. <br /> 825 ARNOLD, STE 114 • MARTINEZ, CALIFORNIA 94553 • (415) 229-1512 OHS #319 <br /> C E R T I F I C A T E 0 A N A L Y S I S <br /> LABOPATOPY NO. 83333 DATE RECEIVED - 06!12/91 <br /> CLIENT Warding Lawson Associates Cercord DATE 0MDnPTEn_ 06/14/91 <br /> CLIENT JOB NO. 1706002503 <br /> ANALYSIS FOR BENZENE , TOLUENE , ETHYL BENZENE & XYLENES <br /> by EPA SW--846 Methods 5030 and 8020 <br /> Concentration( ug,L ) <br /> LAB Ethyl <br /> # Savoie identification Benzene Toluene Benzene Xylenes <br /> 1 MW-2 N0<0 . 3 I1JD<0 . 3 ND10 . 3 ND10 3 <br /> 2 MW-3 ND10 . 3 ND<0 . 3 ND<0 . 3 ^JD<0. 3 <br /> 3 MW--4 ND10 . 3 ND10 .3 ND<0 . 3 ND10 3 <br /> 4 MW-5 ND<0 . 3 ND<0 . 3 ND<0. 3 ND<0 3 <br /> 5 MW-12 ND<0 . 3 ND<0 . 3 ND<0 . 3 ND<0 . 3 <br /> 6 MW-13 ND<0. 3 NJD<0 . 3 ND<0. 3 ND<0 . 3 <br /> 7 MW-14 ND<0 . 3 ND<0 . 3 ND<0 . 3 ND<O 3 <br /> 8 MW-1 190 1 . 1 18 8. 2 <br /> 9 MW-5 N0<0 . 3 N0<0 . 3 ND<0 . 3 ND<0. 3 <br /> 10 MW-8 1700 94 390 480 <br /> 11 MW-9 8200 550 2600 3300 <br /> 12 MW-10 21000 840 2900 10000 <br /> 13 MW-11 ND<0. 3 ND<0 . 3 ND<0. 3 ND<0. 3 <br /> 14 MW-15 ND<0. 3 ND<0 .3 ND<0. 3 ND<0.3 <br /> 15 MW-16 170 0 . 9 16 7 .0 a <br /> 16 MW-17 ND<0.3 ND<0. 3 ND<0 .3 ND<0. 3 <br /> ug/L - parts per billion (ppb) <br /> Method Detection Limit in Water: 0.3 ug/L <br /> QAQC Summary: <br /> Daily Standard run at 20ug/L: RPD = < 15% <br /> MS/MSD Average Recovery =102%: Duplicate RPD = < 10 <br /> Richard Srna, Ph D. <br /> Laboratory Manager <br /> OUTSTANDING QUALITY AND SERVICE <br />