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C H ROMALAB, INC. Submission #. 1999-08-0176 <br /> Environmental Services(SDB) <br /> To Aqua Science Engineers, Inc Test Method 8015M <br /> 8020 <br /> Attn Ian T Reed Prep Method 5030 <br /> Batch QC Report <br /> Volatile Hydrocarbons by 8015/8020 <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch# 1999108118-01.01 <br /> LCS 1999108118-01 01-002 Extracted 08/18/1999 07 18 Analyzed 08/18/1999 07 18 <br /> LCSD 1999108118-01 01-003 Extracted 08/1811999 08 11 Analyzed 08/18/1999 08 11 <br /> 1 Compound Conc [ug/L] Exp Conc [ug/L] Recovery[%] RPD Ctrl Limits [%] Flags <br /> LCS LCSD LCSLCSD LCS LCSD [%] Recovery RPD LCS LCSD <br />' Gasoline 493 509 500 500 986 1018 32 75-125 20 <br /> Surrogate(s) <br /> 4-Bromotluorobe nzene 498 495 500 500 996 990 50-150 <br /> 4-11romolluorobenzene-Fl 482 495 500 500 964 990 50-150 <br /> i <br /> I <br />! <br /> E <br /> 1220 Quarry Lane*Pleasanton,CA 94566-4756 <br /> C Telephone (925)484-1919"Facsimile (925)484-1096 <br /> Printed on 08/20/1999 18 12 Page 14 of 15 <br />