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C H R4 MA LAB, INC. Submission # 1999-05-1062 <br /> Environmental Services(SD8) <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 # 1999105117-01 02 <br /> LCS 1999105117-01 02-002 Extracted 05/17/1999 07 21 Analyzed 05/17/1999 07 21 <br /> LCSD 1999/05117-01 02-003 Extracted 05/17/1999 08 15 Analyzed 05/17/1999 08 15 <br /> Compound Conc [ ug/L] Added Recovery% RPD Control Limits% Flags <br /> LCS LCSD Amount LCS LCSD i i Recovery i RPD LCS LCSD <br /> Gasoline 24888 25279 2500 996 1011 15 75-125 20 <br /> Surrogate(s) <br /> Tnfluorotoluene 4527249 500 905 58-124 <br /> Tnfluorotoluene-FID 5404064 500 1081 58-124 <br /> 1220 Quarry lane'Pleasanton,California 94566-4756 <br /> Telephone (925)484-1919'Facsimile (925)484-1096 <br /> Printed on 05/19/1999 14 55 Page 12 of 17 <br />