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SIERRA LABORATORIES INC <br /> The Park Corporation Date Sampled: 7/19/96 <br /> 8084 Old Auburn Road, Suite E Date Received: 7/23/96 <br />' Citrus Heights, CA 95610 Date Prepared: 7/25-7126196 <br /> Date Analyzed: 7/25-7/26/96 <br />' Sierra Project No.: 9607-184 Analyst: SM <br /> Client Project ID: 5007431USA Stockton#110 <br /> Sample Matrix: Water Report Date: 8/7/96 <br /> EPA METHOD 8020-BTEX/ <br /> EPA METHOD 8015 MODIFIED-GASOLINE RANGE HYDROCARBONS (C4-C12) <br /> (PURGE AND TRAP) <br /> Concentration, µg/1 <br /> Method <br /> Client Sample No.: Mw-1P MW-2P MW-3P MW-4P Detection <br /> Limit, <br /> Sierra Sample No.. 12305 12306 12307 12308 µg/1 <br />' COMPOUNDS: <br /> Benzene ND 13 ND ND 05 <br /> Toluene ND 17 36 ND 0.5 <br /> Ethylbenzene ND 28 ND ND 05 <br /> Total Xylenes ND 15 ND ND 05 <br /> N1TBE ND ND ND ND 5.0 <br /> Gasobne Range ND 190 I30 ND 50 <br /> ' Dilution Factor 1 1 1 1 QC Limits <br /> % Surrogate Recovery <br /> IzBromofluorobenzene 96 82 96 98 70-125 <br /> Quality Assurance/Quahty Control Data <br /> QC Sample ID: 9607-197-12350 <br /> LCS QC Spike Spike Dup QC QC <br /> Compounds % Rec. Limits % Rec. % Rec. Limits RPD Limits <br /> Benzene 99 80-120 84 86 77-111 23 0-30 <br /> Toluene 100 80-120 87 89 78-113 26 0-30 <br /> Ethylbenzene 100 80-120 87 89 75-113 20 0-30 <br /> Gasoline 95 80-120 99 103 76-113 36 0-30 <br /> ' ND means Not Detected <br /> Reporting Limit(RL)=Method Detection Limit(MDL)x Dilution Factor <br />