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p � <br /> M r <br /> Submission# 2001-09-0600 <br /> Gas]BTEX Compounds by 8015M/8021 <br /> Batch QC report <br /> STf_Chromalab <br /> Test Method 8021 B Prep Method 5030 1220 Quarry Lane <br /> Pleasanton CA 94566 <br /> Laboratory Control Spike(LCSILCSD) Water QC Batch#2001/09128-01 05 Tel 925 484 1919 <br /> Analyzed Fax 925 484 1096 <br /> LCS 2001109/28-01 05-002 Extracted 09/28/2001 08 50 y 09/28/2001 08 50 www stt Inc com <br /> LCSD 2001109128-01 05-003 Extracted 09/28/2001 09 22 Analyzed 09/28/2001 09 22 '^'v^v chromalab corn <br /> CA DHS ELAP#1094 <br /> Compound Conc (ug/L] Exp Conc [ug/L] Recovery[%] RPD Ctrl Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD [%] Recovery RPD LCS LCSD <br /> Benzene 108 104 1000 1000 1080 1040 38 77 123 20 <br /> Toluene 114 109 1000 1000 1140 1090 45 78 122 20 <br /> Ethyl benzene 112 107 1000 1000 1120 1070 4 6 70 130 20 <br /> Xylene(s) 328 315 300 300 109 3 1050 4 0 75 125 20 <br /> Surrogate(s) <br /> Tnfluorotoluene 565 526 500 500 1130 1052 58 124 0 <br /> STL Chromalab is a part of Severn Trent Laboratories Inc Page 5 of 7 <br />