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Submission #: 1999-06-0442 <br /> CHROMALAB, INC. <br /> Environmental Services(SOB) <br /> To Wright EnvironfffiWl Services Inc Test Method 8020 <br /> 8015M-1wal <br /> . Attn Mana Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spdre.(LCS/LCSD) Water QC Batch #1999107106-01 03 <br /> LCS 1999107106-01 03-002 Extracted- 07/06/1999 06 38 Analyzed. 071061#999 06.38 <br /> LCSD 1999/0710"103-003 Extracted. 07/06/1999 07 31 Analyzed 07/06/1999 07 31 <br /> Compound Conc {ug/L] Exp Conc { ug/L] Recovery{% RPD Ctrt limits [%] �FlagsLCSLCSD LCS LCSD LCS LCSD 1%1 Recovery RPD LCSD <br /> Gasahne 420 498 500 500 84 0 996 170 75-125 20 <br /> Benzene 887 91 0 1000 1000 88 7 910 2.6 77-123 20 <br /> Toluene 8Y-F— 89 2 1000 1000 837 892 64 78-122 24 <br /> Ethyl benzene 848 890 1000 1000 $48 890 48 70-130 20 <br /> Xylene(s) 235 248 300 300 783 82.7 5 5 75-125 20 <br /> Surrogates) <br /> 4-Bromofluerobenzene 380 430 500 500 76 0 86 0 50-150 <br /> 4-Bromofluorobenzene-Fl 390 430 500 500 78 0 86 0 50-150 <br /> i <br /> 1220 Quarry LaneP}easantan,CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile PA 484-1096 <br /> Printed am 07108699915-w Page 14 of 16 <br />