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t <br /> C H ROMALAB, INC. Submission #- 2000-04-0351 <br /> Environmental Services(SOB) <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 #2000/04124-01 03 <br /> LCS 2000104124-01 03-002 Extracted 04/24/2000 06 38 Analyzed 04/24/2000 06 38 <br /> LCSD 2000104124-01 03-003 Extracted 04/24/2000 07 09 Analyzed 04/24/2000 07 09 <br /> Compound Conc [ug/L] Exp Conc [og/L] Recovery[%] RPD Ctrl Limits[%] I Flags <br /> LCS LCSD LCS LCSD LCSLCSD I [%] Recovery RPD I LCS LCSD <br /> Gasoline 481 497 500 500 962 994 33 75-125 20 <br /> Benzene 89 8 898 1000 1000 898 898 0 0 77-123 20 <br /> Toluene 91 3 914 1000 1000 913 914 0 1 78-122 20 <br /> Ethyl benzene 932 931 1000 1000 932 931 01 70-130 20 <br /> Xylene(s) 298 295 300 300 993 983 1 0 75-125 20 <br /> Surrogate(s) <br /> Tnfluarotoluene 503 502 500 500 1006 1004 58-124 <br /> 4-Bromofluorobenzene-FI 450 491 500 500 900 982 50-150 <br /> 1220 Quarry Lane•Pleasanton CA 94586-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 04/26/2000 15 14 Page 16 of 19 <br /> r <br />