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STL Submission 2004-06-0568 <br /> D <br /> Gas/BTEXIMTBE by 82608 <br /> SECOR-Sacramento <br /> Attn Amy Draffan _ <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone (916)861-0400 Fax (916)861-0430 <br /> Protect Conoco Philips Site#6981 Received 08/20/2004 18 15 <br /> Site 4707 Pacific Ave , Stockton <br /> Batch QC Report <br /> u <br /> Prep(s) 5030E Test(s) 8266B <br /> Laboratory Control Spike Water QC Batch#2004108131-1 C 62 <br /> LCS 2004/08/31-1C 62-005 Extracted '_0813112004 Analyzed 08/31/2004 15 05 <br /> LCSD 2004108131-1 C 62-027 Extracted 08/31/2004 Analyzed 0$13112004 15 27 <br /> Compound Cone ug/L Exp Conc Recovery% RPDJ Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % Rec RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 34 3 302 25 1372 1208 12 7 65-165 20 <br /> Benzene 236 244 25 94 4 976 3 3 69-129 20 <br /> Toluene 25 4 24 6 25 1016 992 2 4 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 532 499 500 1064 998 72-128 <br /> Toluene-d8 501 520 500 1002 1040 80-113 <br /> Severn Trent Laboratories, Inc 09/0212004 0910 <br /> STL San Francisco'1220 Quany Lane,Pleasanton,CA 94566 <br /> A W of swan,Tram Pk Tel 925 484 1919 Fax 925 484 1096"www stl-mc com•CA DHS ELAP#2496 Page 5 of 6 <br />