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C H RO MALABOIN C. Submission # 1999-10-0019 <br /> Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8020 <br /> 8015M <br /> Attn Ian T Reed Prep Method 5030 <br /> Batch QC Report <br /> GasBTEX <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch # 1999110/06-01 01 <br /> LCS 1999110106-01 01-002 Extracted 10/06/1999 08 39 Analyzed 10/06/1999 08 39 <br /> LCSD 1999110106-01 01-003 Extracted 10106/1999 18 03 Analyzed 10/06/1999 18 03 <br /> Compound Conc [ug/L] Exp Conc [ug/L] Recovery[%] RPD Ctrl Limits [%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Gasoline 474 463 500 500 948 926 23 75-125 20 <br /> Benzene 110 116 1000 1000 1100 1160 53 77-123 20 <br /> i <br /> Toluene 111 116 1000 1000 1110 1160 4 4 78-122 20 <br /> Ethyl benzene 106 111 1000 1000 1060 1110 4 6 70-130 20 i <br /> Xylene(s) 317 334 300 300 1057 1113 5 2 75-125 20 <br /> t <br /> Surrogate(s) <br /> Trifluorotoluene 557 569 500 500 1114 1138 58-124 I <br /> 4-Bromofluorobenzene-FI 454 457 500 500 908 914 50-150 j <br /> I <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 10/11/1999 09 03 Page A of 4 <br />