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" C H ROMALAB, INC. Submission #: 1999-10-0143 <br /> Environmental Services (SDS) <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 # 1999110112-01.01 <br /> LCS 1999/40/12-01 01-002 Extracted 10112/19990709 Analyzed 10/12/1999 07 09 <br /> LCSD 1999/10112-01 01-003 Extracted 10/12/1999 07 36 Analyzed 10/12/1999 07 36 <br /> Compound Conc [ug/L] Exp Conc [ug/L] lRecovery[%] RPD Ctrl Limits[%] ! Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD I LCS I LCSD <br /> Gasoline 512 472 500 500 1024 944 81 75-125 20 <br /> Benzene 997 105 1000 1000 997 1050 52 77-123 20 E <br /> Toluene 100 106 1000 1000 1000 1060 58 78-122 20 <br /> Ethyl benzene 960 101 1000 1000 960 1010 51 70-130 20 <br /> Xylene(s) 289 303 300 300 963 1010 4 8 75-125 20 <br /> Surrogate(s) <br /> Trifluorotoluene 490 506 500 500 980 1012 58-124 <br /> i <br /> 4-Bromofluorobenzene-FI 466 444 500 500 I 9321 8881 1 50-150 i <br /> k <br /> 1220 Quarry Lane*Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919*Facsimile (925)484-1096 <br /> Printed on 10/15/19991753 Page 12 of 15 <br />