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STL ChromaLab Submission # 2401-04-0459 <br /> Environmental Services(CA 1094) <br /> To Wright Environmental Services Inc Test Method 82608 <br /> Attn Marta Reid Prep Method 50308 <br /> Batch QC Report <br /> Fuel Oxygenates by 826013 (High Level) <br /> Laboratory Control Spike (LCSILCSD) Soil QC Batch # 2001104126-01 27 <br /> LCS 2001104126-01 27-002 Extracted 04/26/2001 Analyzed 04/26/2001 13 53 <br /> LCSD 2001104126-01 27-003 Extracted 04/26/2001 14 31 Analyzed 04/26/2001 14 31 <br /> Compound Conc [uglKg] Exp Conc [ug/Kg] 'Recovery[%] RPP Ctrl Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Methyl tert-butyl ether 11000 9800 12500 12500 880 784 115 65-1655 20 <br /> Benzene 11000 9700 12500 12500 880 776 126 65-165 20 <br /> Toluene 10000 9700 12500 12500 800 776 30 65-165 20 <br /> Surrogate)s) <br /> 1 2-Dichloroethane-d4 260 222 250 250 1040 388 70-121 <br /> Toluene-d8 239 216 250 250 956 864 81-117 <br /> • <br /> i <br /> 1220 Quant'Lane'Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919'r=acs=le (925),184-,096 <br /> Printed on 04130/2001 14 15 Page 9 or 10 <br />