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C H RO MALAB, INC. Sublmtssion # 1999-08-1062 <br /> Environmental Services(SOB) <br /> To Aqua Science Engineers, Inc Test Method 8015M <br /> 8020 <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#1999/05114-01 03 <br /> LCS 1999105114-01 03-002 Extracted 05/14/1999 09 27 Analyzed 05/14/1999 09 27 <br /> LCSD 1999105114-01 03-003 Extracted 05/14/1999 09 55 Analyzed 05/14/1999 09 55 <br /> Compound Conc [ug/L) 1 Added Recovery% RPD Control Limits% Flags <br /> LCS LCSD i Amount LCS LCSD Recovery RPD LCS LCSD <br /> Gasoline 20105 21578 j 2500 804 863 7 1 75-125 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 4684624 4791806 500 937 958 50-150 <br /> Tnfluorotoluene 4642248 4702647 500 928 941 58-124 <br /> 4-Bromofluorobenzene-FI 5085698 4791806 500 1017 958 50-150 <br /> Ynfluorotoluene-FID 5887179 4702647 ! 500 1177 941 58-124 <br /> 1220 Quarry Lane'Pleasanton California 94566-4756 <br /> Telephone (925)4841919'Facsimile (925)4841096 <br /> Printed on 45/19/1999 14 55 Page 11 of 17 <br />