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C H R4 MALAB, INC. Submission #: 1999-08-0026 <br /> Environmental Services (81313) <br /> To URS Greiner Woodward Clyde-Oakland Test Method 8015M <br /> 8020 <br /> Attn Al Ridley Prep Method 5030 <br /> Batch QC Report <br /> Volatile Hydrocarbons by 8015/8020 <br /> Laboratory Control Spike(LCSILCSD) Sod QC Batch#1999/08/03-0101 <br /> LCS 1999108/03-01 01-002 Extracted 08/03/1999 06 37 Analyzed 08/03/1999 06 37 <br /> LCSD 1999108103-01 01-003 Extracted 08/0311999 07 31 Analyzed 08/03/1999 07 31 <br /> Compound Conc [mg/Kg] Exp Conc [mg/Kg ] Recovery[%] RPD Ctrl Limits[%] Flags <br /> LCS LCSD LCS LCSD LCS LCSD ]%] Recovery RPD LCS LCSD <br /> Gasoline 0 517 0 539 0 500 0 500 1034 1078 42 75-125 35 <br /> Benzene 0 100 i 00940 01000 01000 11000 94 0 62 77-123 35 <br /> Toluene 0 100 00960 01000 , 01000 11000 96 0 41 I M122 35 <br /> Ethyl benzene 00980 00930 01000 01000 I 980 93 0 5 2 70-130 35 <br /> Xylene(s) 0 288 0 273 0 300 0 300 960 91 0 53 75-125 35 <br /> Surrogate(s) <br /> Tnfluorotoluene 446 413 500 500 892 82 6 53-125 <br /> 4-Bromofluorobenzene-Fl 423 484 500 500 84 6 96 8 58-124 I <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 08/27/1999 14 00 Page 29 of 37 <br />