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C H RO MALAB, INC. Submission #. 1999-05-1136 <br /> Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8020 <br /> 8015M <br /> Attn Greg Schramn Prep Method 5030 <br /> Batch QC Report <br /> Volatile Hydrocarbons by 8015/8020 <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch # 1999105119-01 03 <br /> LCS 1999105119-01 03-002 Extracted 05/19/1999 07 12 Analyzed 05/19/1999 07 12 <br /> LCSD 1999/05119-01 03-003 Extracted 05/19/1999 08 06 Analyzed 05/19/1999 08 06 <br /> Compound Conc [ ug/L) Added Recovery% RPD Control Limits % Flags <br /> LCS LCSD Amount LCS LCSD Recovery RPD LCS LCSD <br /> Gasoline 22136 22849 2500 885 914 32 75-125 20 <br /> Surrogate(s) <br /> 4Bromofluorobenzene-F! 5183972 5424222 Soo 1037 1085 50-150 <br /> 1220 Quarry Lane• Pleasanton,California 94566-4756 <br /> Telephone (925)4841919'Facsimile (925)484-1096 <br /> Printed on 05/25/1999 08 01 Page 7 of 9 <br />