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' Submission # 2001-11-0429 <br /> Gas/BTEX by 8015M/8021 <br /> . Batch QC report <br /> S7L Chromalab <br /> Test Method 8021 B Prep Method 5030 1220 Quarry Lane <br /> Pleasanton,CA 94566 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch#2001111/21-01 05 Tel 925 484 1919 <br /> Fax 925 484 1096 <br /> LCS 2001/11121-0105-004 Extracted 11121120010840 Analyzed 11/21/20010840 www stt-inccom <br /> LCSD 2001111121-01 05-005 Extracted 11/21/200109 13 Analyzed 11/21/2001 09 13 www chramalab com <br /> CA DHS ELAP#1094 <br /> Compound Cone ]ug/L] Exp Cone [ug1L] Recovery RPD Ctrl Limits Flags <br /> LCS LCSD LCS LCSD LCS LCSD [Wo] Recovery RPD LCS LCSD <br /> Benzene 925 896 1000 1000 925 896 32 77-123 20 <br /> Toluene 937 89 2 1000 1000 937 892 4 9 78-122 20 <br /> Ethyl benzene 939 895 1000 1000 939 895 4 8 70-130 20 <br /> Xylene(s) 280 266 300 300 933 88 7 51 75-125 20 <br /> Surrogate(s) <br /> Tnfluorotoluene 439 433 500 500 878 866 58-124 <br /> • <br /> STL Chromalab is a part of Severn Trent Laboratories Inc Page 6 of 8 <br />