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C H RO MALAB, INC. Submission #: 1999-06-0442 <br /> Environmental Services(SOB) <br /> To- Wnght Environ tal Services Inc Test Method 8020 <br /> 8015M <br /> Attn- Maria Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Sp*e (LCS/LCSD) Water QC Batch# 1999107107-01.02 <br /> LCS 1999107107-01 02-001 Extracted 07107/1999 08 06 Analyzed 07/07/1999 08 06 <br /> LCSD 1999/07107-01 02-002 Extracted 07/07/1999 09 00 Analyzed 07/07/1999 09 00 <br /> Compound Conc [ug/L] Exp Conc [ ug/L lRecovery I%j RPE) I Ctrl Umrts Flags <br /> LCS LCSD LCS I LCSD LC5 LCSD 1%] 1 Recovery I RPD LCS LCSD <br /> Gasoline 515 495 500 Soo 1032 990 42 75-125 20 <br /> Benzene 935 903 1000 1000 935 903 3 5 77-123 20 <br /> Toluene 69 869 1000 1000 893 86 9 2.7 78-122 ib <br /> Ethyl benzene Soo 784 1000 1000 800 784 20 70-130 20 <br /> Xylene(s) 239 235 300 300 797 783 1 8 75-125 20 <br /> surrogates) <br /> TnNuorotoluene 408 384 500 Soo 81 6 768 58-124 <br /> 4-8romoftucrobenzene-Fl 458 518 500 500 91 6 1036 50-150 <br />• <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone (925)4841919•Facsrmrte (925}4841096 <br /> Prtnted ca-07!08!1999 15.x6 Page 16 of 16 <br />