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C H RO MALAB, INC. Submission #: 2000-03.0228 <br /> Environmental Services(SDB) <br /> To Wright Environmental Services Inc Test Method 8015M <br /> 8020 <br /> Attn John Lynch Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike (LCSILCSD) Water QC Batch #2000103120-01 01 <br /> LCS 2000/03120-0101-002 Extracted 03/20/200011 14 Analyzed 03120/20001114 <br /> LCSD 2000/03120-0101-003 Extracted 03/20/2000 11 49 Analyzed 03120120001149 <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 426 494 500 500 852 988 148 75-125 20 <br /> Benzene 923 904 1000 1000 923 904 21 77-123 20 <br /> Toluene 908 886 1000 1000 908 886 25 78-122 20 <br /> Ethyl benzene 925 895 1000 1000 925 895 3 3 70-130 20 <br /> Xylene(s) 276 267 300 300 920 890 33 75-125 20 <br /> Surrogate(s) <br /> Tnfluorotoluene 454 431 500 500 908 862 58-124 <br /> 4-Bromofluorobenzene-FI 385 445 500 500 770 890 50-150 <br /> • 1220 Quarry LanePleasanton CA 94566-4756 <br /> Telephone (925)4841919"Facsimile (925)484-1096 <br /> Pnnteq on 03/24/2000 17 04 Page 11 of 14 <br />