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CHIROMALAB, 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 (LCS/LCSD) Water QC Batch #2000103124-01 04 <br /> LCS 2000103124-0104-002 Extracted 03124120001016 Analyzed 03/24120001016 <br /> LCSD 2000103124-01 04-003 Extracted 03/24/2000 10 44 Analyzed 03/24/2000 10 44 <br /> Compound Conc [ug1L] Exp Conc [uglL] Recovery[%] RPD Ctrl Limits[%] Flags <br /> LCS I LCSD LCS LCSD LCS LCSD N Recovery RPD LCS LCSD <br /> Gasoline 455 442 500 500 910 884 29 75-125 20 <br /> Benzene 85 0 80 4 1000 1000 850 80 4 56 77-123 20 <br /> Toluene 957 866 1000 1000 957 866 100 78-122 20 <br /> Ethyl benzene 93 7 847 1000 1000 93 7 84 7 101 70-130 20 <br /> Xylene(s) 283 259 300 300 943 86 3 89 75-125 20 <br /> Surrogate(s) <br /> Tnfluomtoluene 450 390 500 500 90 0 78 0 58-124 <br /> 4-Bromofluorobenzene-FI 470 461 500 500 940 922 50-150 <br /> • <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 03/24/2000 17 04 Page 13 of 14 <br />