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Submission #" 2000-07-0428 <br /> C H RO MALAB, INC. <br /> Environmental Services(SOB) <br /> . To Wright Environmental Services Inc Test Method 8020 <br /> 8015M <br /> Attn Chns Palmer Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX (Methanol Extraction) <br /> Laboratory Control Spike (LCSlLCSD) Soil QC Batch #2000107128-05 03 <br /> LCS 2000107128-05 03-002 Extracted 07/28/2000 12 40 Analyzed 07/28/2000 12 40 <br /> LCSD 2000107128-05 03-003 Extracted 07/28/2000 13 12 Analyzed 07/28/2000 13 12 <br /> Compound Conc [mg/Kg] Exp Conc [mg/Kg) Recovery P/6]1 RPD I Ctrl Limits[%] I Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery I RPD LCS LCSD <br /> Gasoline 0 635 0 539 0 625 0 625 1016 862 164 75-125 35 <br /> Benzene 0 144 0 137 0 125 0 125 1152 1096 50 77-123 35 <br /> Toluene 0 148 0 139 0 125 0 125 1184 1112 63 78-122 35 <br /> Ethyl benzene 0 152 0 144 0 125 0 125 1216 1152 54 70-130 35 <br /> Xylene(s) 0 457 0 436 0 375 0 375 1219 1163 4 7 75-125 35 <br /> Surrogate(s) <br /> TriFluorotoluene 612 570 500 500 1224 1140 53-125 <br /> 4-Bromofluorobenzene-Fl 383 382 500 500 76 6 764 58-124 <br /> 1220 Quarry Lane"Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 08103!2000 10 55 Page 4 of 5 <br />