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1 <br /> SIERRA LABORATORIES INC <br /> GHH Engineers, Inc. Date Sampled 12/18/98 <br /> 8084 Old Auburn Road, Suite E Date Received 12/23/98 <br />' Citrus Hieghts, CA 95610 Date Prepared. 12/29/98 <br /> Date Analyzed. 12/29/98 <br /> Sierra Project No 9812-388 Analyst. SM <br /> Client Project ID. 5007 10/ USA Stockton <br /> Sample Matrix, Water Report Date 12/30/98 <br /> EPA METHOD 8020-BTEX/ <br />' EPA METHOD 8015 MODIFIED-GASOLINE RANGE HYDROCARBONS (C4-C12) <br /> (PURGE AND TRAP) <br /> Concentration, ua/L <br /> ' Client Sam Ie No. MW-3P MW-6P Method <br /> Limit, <br /> Sierra Sample No. 21028 21029 uo/L <br /> COMPOUNDS: <br /> Benzene ND ND <br /> 05 <br /> Toluene <br /> 33 ND OS <br /> Ethylbenzene 054 ND 05 <br /> Total Xylenes 1 6 ND 05 <br /> MTBE ND ND <br /> 50 <br /> Gasoline 550 ND <br /> sa <br /> ' Dilution Fa tor 1 1 QC Limits <br /> % Surrogate Recovery <br /> ' 4-B romofluorobenzene i i 3 85 70-125 <br /> ' Quality Assurance/Quality Control Data <br /> QC Sample ID. 9812-387-21022 <br /> LCS QC Spike Spike Dup QC QC <br /> Com ounds % Rec Limits % Rec % Ree Limits RPD Limits <br /> Benzene 90 80-120 89 88 39-150 1 1 0-30 <br /> Toluene 93 80-120 93 90 46-148 3 3 0-30 <br /> Ethylbenzene 95 80-120 93 91 32-160 2 2 0-30 <br /> Gasoline 114 80-120 112 114 50-150 1 8 1 0-30 <br /> ND means Not Detected <br /> RLportina Limit(RL) =Method Detection Limit(INIDL) r Dilution )= "or <br />