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LSuperior Precisior7 .analytical, Inc. <br /> 325 Arnold Drive Suite 1 14 r Martinez California 94553 ■ (51 0) 229 1 512 / fax 45 10) 229-1526 <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 85211 DATE RECEIVED 03/12/92 <br /> CLIENT ERM-West , Inc . DATE REPORTED 03/23/92 <br /> CLIENT JOB NO . CATELLUS DATE SAMPLED 03/12/92 <br /> ANALYSIS FOR BENZENE , TOLUENE , ETHYL BENZENE & XYLENES <br /> by EPA SW-846 Methods 5030 and 8020 <br /> Concentration( ug/L ) <br /> B Ethyl <br /> VA <br /> Sample Identification Benzene Toluene Benzene Xylenes <br /> ---- --------------------- ------- ------- ------- ------- <br />' 1 4W-1 ND<0 . 3 ND<0 . 3 ND<0 . 3 ND<0 . 3 <br /> 2 MW-2 ND<0 . 3 ND<0 . 3 ND<0 . 3 ND<0 . 3 <br /> MW-3 ND<0 . 3 ND<0 . 3 ND<0 . 3 ND<0 . 3 <br /> MW-4 ND<0 . 3 ND<0 . 3 ND<0 . 3 ND<0 . 3 <br /> 5 MW-5 2900 800 840 1900 <br /> 6 MW-6 ND<0 . 3 ND<0 . 3 ND<0 . 3 ND<0 . 3 <br /> ug/L - parts per billion { ppb} <br /> Method Detection Limit in Seater 0 3 ug/L <br /> QAQG Summary <br />' Daily Standard run at 20ug/L . RPD = <15% <br /> MS/MSD Average Recovery = 102% ' Duplicate RPD = < 3 <br />' Richard Srna, Ph. D . <br /> 04-<� <br />' Laboratory Di.recto <br /> Certified Laboratories <br />