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C H ROMALAB, INC. Submission #: 2000-01-0456 <br /> Environmental Services(SDB) <br /> To Wright Environmental Services Inc Test Method 8015M <br /> 8020 <br /> Attn Mana Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch # 2000101131-01 05 <br /> Sample ID MW-1 Lab Sample ID 2000-01-0458-001 <br /> MS 2000/01131-01 05-004 Extracted 01131/20001718 Analyzed 01131120001718 Dilution 1 0 <br /> MSD 2000101131-01 05-005 Extracted 01/31/2000 17 52 Analyzed 01/31/2000 17 52 Dilution 1 0 <br /> Compound Conc [ug/L] Exp Conc f u IL 1 "IMV;SMSD <br /> RPD Ctrl Limits[% Flags <br /> MS MSD Sample MS MSD [%] Recovery RPD MS MSD <br /> Benzene 101 105 NO 1000 1000 1010 1050 39 65-135 20 <br /> Toluene 967 977 NO 1000 1000 967 977 10 65-135 20 <br /> Ethyl benzene 979 977 NO 1000 1000 979 977 02 65-135 20 <br /> Xylene(s) 283 284 NO 300 300 943 947 04 65-135 20 <br /> Surrogate(s) <br /> Trifluorotoluene 497 492 500 500 994 984 58-124 <br /> • <br /> 1220 Quarry Lane'Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919"Facsimile (925)484-1096 <br /> Printed on 02/04/2000 15 28 Page 15 of 15 <br />