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Superior Precision Analytical. IncR , <br /> Fu <br /> 825 Arnold Drive, Suite 1 14 • Martinez, California 94553 • 15101 229-15 12 /fax 1519 1526 <br /> We 2 8 41(02 <br /> C E R T I F I C A T E O F A N A L Y S EVVy,�jRO!, i'v;1_4 1.41. fi}~ft,LTH <br /> LABORATORY NO. : 87415 DATE RECEIVED: 12/14/92 <br /> CLIENT: Decon Environmental Services DATE REPORTED: 12/21/92 <br /> CLIENT JOB NO. : STOCKTON STEEL DATE SAMPLED : 12/11/92 <br /> ANALYSIS FOR BENZENE, TOLUENE, ETHYL BENZENE & XYLENES <br /> by EPA SW-846 METHODS 5030 and 8020 <br /> Concentration (mg/kg) <br /> TSAR Ethyl <br /> # Sample Identification Benzene Toluene Benzene Xylenes <br /> ---- --------------------- ------- ------- -------- ------- <br /> 1 01-N ND<0 . 003 ND<0 . 003 ND<0 . 003 ND<0 . 003 <br /> 2 02-N ND<0 . 003 ND<0 . 003 ND<0 . 003 ND<0 . 003 <br /> 3 03-N ND<0 . 003 ND<0 . 003 ND<0 . 003 ND<0 . 003 <br /> 4 04-N ND<0 . 003 ND<0 . 003 ND<0 . 003 ND<0 . 003 <br /> 5 01-E ND<0 . 003 ND<0 . 003 ND<0 . 003 ND<0 . 003 <br /> 6 02-E ND<0 . 003 ND<0 . 003 ND<0 . 003 ND<0 . 003 <br /> 7 03-E 0 . 047 0 . 070 0 . 32 1. 0 <br /> 8 04-E ND<0 . 003 ND<0 . 003 ND<0 . 003 ND<0 . 003 <br /> 9 DESP3 ' ND<0 . 003 ND<0 . 003 ND<0 . 003 ND<0 . 003 <br /> mg/kg - parts per million (ppm) <br /> Method Detection Limit in Soil : 0 . 003 mg/kg <br /> QAQC Summary: <br /> Daily Standard run at 20 ug/L: RPD = <15% <br /> MS/MSD Average Recovery = 92% : Duplicate RPD = <1% <br /> Richard Srna, Ph.D. <br /> Laboratory Director <br /> Certified Laboratories <br />