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-C H RO MALAB, INC. Submission # 2000-04-0351 <br /> Environmental Services(SDB) <br /> To Wright Environmental Services Inc Test Method 8020 <br /> 8015M <br /> Attn Mana Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch #2000!04!25-01 01 <br /> LCS 2000104/25-01 01-002 Extracted 04/25/2000 06 58 Analyzed 04/25/2000 06 58 <br /> LCSD 2000104/25-01 01-003 Extracted 04/25/2000 07 33 Analyzed 04/25/2000 07 33 <br /> Compound Conc j ug/L] Exp Conc (ug/L] Recovery[%]I RPD Ctrl Limits[%] I Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Gasoline 511 464 500 500 1022 928 96 75-125 20 <br /> Benzene 658 86 0 1000 1000 858 860 0 2 77-123 20 <br /> Toluene 816 818 1000 1000 816 818 0 2 78-122 20 <br /> Ethyl benzene 830 83 6 1000 1000 830 83 6 0 7 70-130 20 <br /> Xylene(s) 255 255 300 300 850 850 00 75-125 20 <br /> Surrogate(s) <br /> Tnfluorotoluene 374 376 500 500 748 752 58-124 <br /> 4-Bromofluorobenzene-FI 443 408 500 500 886 81 6 50-150 <br />• <br /> I <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 17 of 19 <br /> r <br />