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C H RO MALAB, INC. Submission #: 1999.08-0026 <br /> Environmental Services (SDB) <br /> To URS Greiner Woodward Clyde-Oakland Test Method 8015M <br /> Bola <br /> Attn AI Ridley Prep Method 5030 <br /> Batch QC Report <br /> • Volatile Hydrocarbons by 8015/8020 <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch #1999108104-01 02 <br /> LCS 1999108104-01 02-002 Extracted 08/04/1999 06 43 Analyzed 08/04/1999 06 43 <br /> LCSD 1999108104-01 02-003 Extracted 08/04/1999 07 37 Analyzed 08/04/1999 07 37 <br /> Compound Cork [uglL] Exp Cone [ug/L] Recovery[%] RPD Ctrl Limits [%] Flags <br /> LCS LCSD LCS LCSD LCS. LCSD [%1 Recovery �RPD LCS I LCSD <br /> Gasoline 504 439 500 500 1008 878 138 75-125 20 <br /> Benzene 985 830 1000 1000 98 5 830 171 77-123 20 1 <br /> Toluene 970 82 2 100 0 1000 970 822 16 5 78-122 20 <br /> Ethyl benzene 936 1 80 0 1000 1000 936 800 157 70-130 20 <br /> Xylene(s) 281 239 300 300 937 79 7 161 75-125 20 <br /> Surrogate(s) <br /> Trifluorotoluene 408 343 500 500 81 6 686 58-124 <br /> 4-Bromofluorobenzene-Fl 486 489 500 500 97 2 97 8 50-150 ( I <br /> i <br /> 1220 Quarry Lane*Pleasanton,CA 945664756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 08/27/1999 14 00 Page 32 of 37 <br /> I <br />