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I <br /> Submission #• 200' -040459 <br /> STL ChromaLab <br /> Environmental Services(CA 1094) <br /> To Wright Environmental Services Inc Test Method 8260B <br /> • Attn Marla Reid Prep Method 50306 <br /> Batch QC Report <br /> Fuel Oxygenates by 8260B <br /> I <br /> Laboratory Control Spice (LCSILCSD) Soil QC Batch #2001104/23-01 27 <br /> LCS 2001104123-0127-002 Extracted 04123/2001 14 12 Analyzed 04/2312001 14 12 <br /> LCSD 2001/04123-01 27-003 Extracted 04/23/2001 14 51 Analyzed 04/23/2001 14 51 <br /> Compound I Conc [ug/Kg] Exp Conc [ug/Kg] ,Recovery[0/61 RPO Ctrl Umits[%] I Flags <br /> I LCS LCSD LCS LCSD LCS i LCSD; [%] ,Recoveryl RPD �1, LCS LCSD <br /> Methyl tert-butyl ether 875 96 2 1000 1000 j 87 51 962' 95 E 65-165 1 20 ` <br /> !Benzene 96 9 : 96 0 1000 I 1000 9691 960, 09 69-129 20 <br /> Toluene 944 188 7 1000 1 1000 94 41 88 7' 6 2 1 70-130 20 <br /> Surrogatef e) 1 <br /> 1,2-0ichloroethane-d4 1 484 524 500 500 9681 1048 1 70-121 <br /> Toluene-dB 1531 509 500 500 1 106 2' 1018 81-117 <br /> I <br /> i <br /> 1220 Quarry Lane'Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Pnnted an 04/30/2001 13 27 Page 35 of 39 <br />