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o ST <br /> 1L` Submission# 2003-12-OflQS <br /> � <br /> Gas/BTEXIMTBE by 8260B . <br /> SECOR-Sacramento <br /> Attn Amy Draf#an <br /> 3017 Kilgore Road, Suite 100 <br /> Rancho Cordova, CA 95670 <br /> Phone (916) 861-0400 Fax (916) 861-0430 <br /> Project 6981 Received 11/26/2003 1743 <br /> Site 4707 Pacific Ave, Stockton, CA <br /> Batch QC Report <br /> Prep(s) 5030B Test(s) 8260B <br /> Laboratory Control Spike Water QC Batch#2003112105-1 B 62 <br /> LCS 2003112105-1 B 62-057 Extracted 12/05/2003 Analyzed 12/05/2003 08 57 <br /> LCSD 2003112105-18 62-019 Extracted 12/05/2003 Analyzed 12/05/2003 09 19 <br /> Compound Conc ug/L Exp Conc Recovery% RPD Ctrl Limits% Flags <br /> LCS LCSD LCS LCSD % 1 Rec I RPD LCS LCSD <br /> Methyl tert-butyl ether(MTBE) 176 205 25 704 820 152 65-165 20 <br /> Benzene 205 20 6 25 820 82 4 0 5 69-129 20 <br /> Toluene 1221 22 0 25 884 880 0 5 70-130 20 <br /> Surrogates(s) <br /> 1,2-Dichloroethane-d4 471 484 500 942 968 76-114 <br /> Toluene-d8 510 537 500 102 0 1 1074 88-110 <br /> Severn Trent Laboratories, Inc 1211 112003 17 5U <br /> STL San Francisco* 1220 Quarry Lane,Pleasanton,CA 94566 <br /> A panel Severn Trem Plc Tel 925 484 1919 Fax 925 484 1096*www sti-Inc corn*CA AHS ELAP#2496 Page 5 of 6 <br />