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C H ROMALAB, INC. Submission #- 2000-04-0361 <br /> . Environmental Services(SDB) <br /> To Wright Environmental Services Inc Test Method 8020 <br /> 8015M <br /> Attn Marla Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch#2000104121-01 03 <br /> LCS 2000104121-01 03-002 Extracted 04/21/2000 12 53 Analyzed 04/21/2000 12 53 <br /> LCSD 2000104121-01 03-003 Extracted 04/21/2000 13 25 Analyzed 04/21/2000 13 25 <br /> Compound Cone [ug/L] Exp Cone [ug/L lRecovery[N RPD Ctrt Limas [%] Flags <br /> LCS I LCSD LCS I LCSD I LCS LCSD 1%] Recovery I RPD LCS LCSD <br /> Gasoline 544 530 500 500 1088 1060 26 75-125 20 <br /> Benzene 466 453 50 50 932 906 28 77-123 20 <br /> Toluene 472 46 1 50 50 944 922 24 78-122 20 <br /> Ethyl benzene 478 466 50 50 956 932 25 70-130 20 <br /> Xylene(s) 151 146 150 150 1007 973 34 75-125 20 <br /> Surrogates) <br /> Trifluorotoluene 236 256 250 250 944 102 4 58-124 <br /> 4-Bromofluorobenzene-FI 484 477 500 500 968 954 50-150 <br /> 1220 Quarry Lane"Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 04/26/2000 15 14 Page 15 of 19 <br />