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SIERRA LABORATORIES INC 1 <br /> The Park Corporation Date Sampled: 4121197 <br /> 8084 Old Auburn Road, Suite E Date Received- 4/24/97 <br /> Citrus Heights,CA 95610 Date Prepared: 4/25-4128/97 , <br /> Date Analyzed: 4125-4/28197 <br /> Sierra Protect No.. 9704-254 Analyst. SM <br /> Client Project ID- 5047-J1/USA Stockton##110 <br /> Sample Matrix: Water Report Date: 511197 <br /> EPA METHOD 8020-BTEX/ <br /> EPA METHOD 8015 MODIFIED-GASOLINE RANGE HYDROCARBONS (C4-C12) <br /> URGE AND TRAP <br /> Concentration, 1 <br /> Method <br /> Client Sample No.: MW-3P MW-5P MW-2 MW-1F Detection <br /> Limit, <br /> Sierra Sample No • 6099 6100 6101 6102 /l <br /> COMPOUNDS ' <br /> Benzene 089 ND ND ND 05 <br /> Toluene 8 1 ND 52 ND 05 <br /> Ethylbenzene ND ND ND ND 05 <br /> Total Xylenes 082 ND ND ND 05 <br /> MTBE ND ND ND ND 50 <br /> Gasoline Range 680 ND 190 ND 50 <br /> Dilution Factor 1 1 1 1 QC Limits ' <br /> % Surrogate Recovery: <br /> 4-Bromofluorobenzene 100 95 100 91 70- <br /> 11QC Sample ID: 974-243-6049 125 <br /> Quality Assurance/Quality Control Data <br /> 'LCS QC Spike ISpikeDup QC QC <br /> Compounds % Rec Limits % Rec % Rec. Limits RPD Limits <br /> Benzene 98 80-120 90 95 39-150 5 7 0-30 , <br /> Toluene 100 80-120 93 98 46-148 5 8 0-30 <br /> Ethylbenzene 100 80-120 98 100 32-160 18 0-30 <br /> Gasoline 100 80-120 1100 98 50-150 12 7 0-30 <br /> ND means Not Detected <br /> Reporting Limit(RL)=Method Detection Limit(MDL)x Dilution Factor <br /> r <br />