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CHROMALAB, INC. Submission#: 2000-01-0456 <br /> Environmental Services(SDB) <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 (LCSILCSD) Water QC Batch #2000102/02-01 05 <br /> LCS 2000102/02-0105-002 Extracted 02/02/2000 08 43 Analyzed 02/02/2000 08 43 <br /> LCSD 2000102102-01 05-003 Extracted 02/02/2000 09 16 Analyzed 02/02/2000 09 16 <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 /> Gasoline 535 536 500 500 1070 1072 02 75-125 20 <br /> Benzene 106 104 1000 1000 1060 1040 19 77-123 20 <br /> Toluene 103 981 1000 1000 1030 981 49 78-122 20 <br /> Ethyl benzene 103 962 1000 1000 1030 962 6 6 70-130 20 <br /> Xylene(s) 293 279 300 300 977 930 49 75-125 20 <br /> Surrogate(s) <br /> Tnfluorotoluene 530 490 500 500 1060 980 58-124 <br /> 4-Bromofluorobenzene-Fl 490 490 500 500 980 980 50-150 <br /> • <br /> • <br /> 1220 Quarry Lane'Pleasanton CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 02/04/2000 15 28 Page 14 of 15 <br />