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C H RO MALAB, INC. Submission #: 1999-10-0143 <br /> " Environmental Services (SDB) <br /> To Wright Environmental Services Inc Test Method 8015M <br /> 8020 <br /> Attn Marla Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Matrix Spike { MS 1 MSD ) Water QC Batch #1999/10/12-0105 <br /> Sample ID MW-7 Lab Sample ID 1999-10-0143-007 <br /> MS 1999/10/12-0105-004 Extracted 10/12/1999 17 45 Analyzed 10/13/1999 17 45 Dilution 10 <br /> MSD 1999/10/12-01 05-005Extracted 10/12/1999 18 18 Analyzed 10/13/1999 18 18 Dilution 10 <br /> Compound Conc [ug/L] Exp Conc (u /LRecove [% RPD Ctrcol Limits [%] Flags <br /> MS I MSD (Sample MS MSD MS MSD [%] Revery) RPD I MS I MSD <br /> Benzene 114 110 ND 1000 1000 1140 1100 3 6 65-135 20 <br /> Toluene 109 108 ND 1000 1000 1090 1080 0 9 65-135 20 <br /> Ethyl benzene 111 105 ND 1000 1000 1110 1050 5 6 65-135 20 <br /> Xylene(s) 326 311 ND 300 300 1087 1037 4 7 65-135 20 <br /> Sumrogate(s) <br /> Tnfluorotoluene 599 596 500 500 1198 1192 58-124 <br /> 1220 Quarry Lane"Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Pnnted on 10/15/1999 17 53 Page 14 of 15 <br />