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C H RO MALAB, INC. Submission #- 2000-04-0434 <br /> Environmental Services(SOB) <br /> To Wright Environmental Services Inc Test Method 8020 <br /> 8015M <br /> Attn Chris Palmer Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike (LCS/LCSD) Soil QC Batch #2000/04128-01 02 <br /> LCS 2000104128-01 02-002 Extracted 04/28/2000 07 11 Analyzed 04/28/2000 07 11 <br /> LCSD 2000104128-01 02-003 Extracted 04/28/2000 07 43 Analyzed 04/28/2000 07 43 <br /> Compound Conc (mg/Kg] Exp Conc [mg/Kg) Recovery r/oj RPD I Ctrl Limits[%) I Flags <br /> LCS LCSD I LCS LCSD LCS I LCSD [%] Recovery RPD I LCS I LCSD <br /> Gasoline 0 461 0 453 0 500 0 500 922 906 1 8 75-125 35 <br /> Benzene 00936 00823 01000 01000 936 823 128 77-123 35 <br /> Toluene 00909 00836 01000 0 1000 9013 836 84 78-122 35 <br /> Ethyl benzene 00878 00827 3 01000 01000 87 8 82 7 5 0 70-130 35 <br /> Xyiene(s) 0 258 0 245 0 300 0 300 860 81 7 5 1 75-125 35 i <br /> Surrogate(s) <br /> Tnfluorotoluene 452 403 500 500 904 80 6 53-125 <br /> 4-Bromoftuorobenzene-FI 526 508 500 500 1052 1016 58-124 <br /> 1220 Quarry Lane'Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 05102/2000 11 25 Page 22 of 24 <br />