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Submission # 2002-08-0353 <br /> Gas/BTEX by 8015M/8021 <br /> i • ' tf <br /> Compliance and Closure, Inc STL San Francisco <br /> Mulkey 1220 quarry Lane <br /> Atte Gary y Pleasanton CA 94566 <br /> 7020 Koll Center Parkway Suite 134 <br /> Pleasanton, CA 94566-3107 Tel (925)484-1919 <br /> Phone (925) 426-5395 Fax (925) 426-5391 Fax (925)484-1096 <br /> www stl-inc cam <br /> Protect 12118-6 Received 08/16/2002 14 02 www rhromalab com <br /> Quik Stop#121 <br /> CA DHS ELAP#2496 <br /> Batch QC Report _ <br /> Prep(s) 5030 Test(s) 8021 B <br /> Laboratory Control Spike Water QC Batch# 2002108121-01 05 <br /> LCS 2002108121-01 05-004 Extracted 08/21/2002 Analyzed 08/21/2002 08 34 <br /> LCSD 2002108121-01 05-005 Extracted 08/21/2002 Analyzed 08/21/2002 09 06 <br /> Compound Conc ug/L. Exp Conc Recovery RPD Ctrl Limits % Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Benzene 889 904 1000 88 9 904 1 7 77-123 20 <br /> Toluene 88 9 906 1000 88 9 906 1 9 78-122 20 <br /> Ethyl benzene 89 8 91 0 1000 89 8 91 0 1 3 70-130 20 <br /> Xylene(s) 261 264 300 87 0 88 0 1 1 75-125 20 <br /> Surrogates(s) <br /> Trifluorotoluene 479 1471 500 95 8 94 2 58-124 <br /> 08/23/2002 16 21 STL San Francisco is part of Severn Trent Laboratories Inc Page 19 of 23 <br />