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SIERRA LABORATORIES INC <br /> The Park Corporation Date Sampled: 12119196 <br /> 8084 Old Auburn Road Date Received. 12124/96 <br /> Citrus Heights, CA 95610 Date Prepared- 12/26/96 , <br /> Date Analyzed. 12/26/96 <br /> Sierra Project No.: 9612-221 Analyst SM <br /> Client Project ID: 5023-J1/Diarnond Lumber Manteca <br /> Sample Matrix- Water Report Date. 112197 <br /> EPA METHOD 8020-BTEX/ <br /> EPA METHOD 8015 MODIFIED-GASOLINE RANGE HYDROCARBONS (C4-C12) , <br /> (PURGE AND TRAP) <br /> Concentration, µg11 <br /> Method <br /> Client Sample No.: Trip Blank Detection <br /> Limit, <br /> Sierra Sample No . 21937 µg/l <br /> COMPOUNDS: <br /> Benzene ND 05 <br /> Toluene ND 05 <br /> Ethylbenzene ND 05 <br /> Total Xylenes ND 05 <br /> Gasoline Range ND 50 <br /> Dilution Factor 1 QC Limits ' <br /> %Surrogate Recovery, <br /> 4-Brornofluorobenzene 96 70-125 <br /> IQC Sample ID: 9612-22I-21937 Quality Assurance/Quality Control Data ' <br /> LCS ISpike Spike Dup QC QC <br /> Compounds %Rec I%Rec. % Rec Limits RPD Limits <br /> Benzene 94 93 95 39-150 16 0-30 <br /> Toluene 98 95 97 46-148 13 0-30 <br /> Ethylbenzene 100 98 99 32-160 10 0-30 <br /> Gasoline 96 85 90 50-150 57 0-30 <br /> ND means Not Detected <br /> Reporting Limit(RL)=Method Detection Limit(MDL)x Dilution Factor ' <br />