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' SIERRA LABORATORIES INC <br />' GHH Engineering,Inc. Date Sampled 1116198 <br /> . 8084 Old Auburn Road, Suite E Date Received. I/20/98 <br />' Citrus Heights, CA 95610 Date Prepared 1122/98 <br /> Date Analyzed 1122/98 <br /> Sierra Project No.- 9801-156 Analyst SM <br /> Client Pr41ect ID; 5059 10/USA-LODI <br /> Sample Matrix- Water Report Date 1123198 <br />' EPA METHOD 8020-BTEX/ <br /> EPA METHOD 8015 MODIFIED-GASOLINE RANGE HYDROCARBONS (C4-C12) <br /> (PURGE AND TRAP) <br /> Concentration,µg/l <br /> Method <br /> Client Sample No : MW-7 MW-5 NIW-6 MW-4 Detection <br /> Limit, <br />' Sierra Sample No.. 789 790 791 792 Li <br /> COMPOUNDS <br /> Benzene ND ND ND 0 87 05 <br />' Toluene ND ND ND 94 05 <br /> Ethylbenzene ND ND ND ND 05 <br /> Total Xylenes ND ND ND 320 05 <br /> MTBE ND ND ND 52 50 <br /> lie <br /> Gasoline Range ND ND ND 1500 50 <br />' D1Iutlon Factor 1 1 1 1 QC Limits <br /> %Surrogate Recovery <br /> 4-Bromofluorobenzene 95 96 96 100 70-125 <br /> Quality Assurance/Quality Control Data <br /> QC Sample ID 9801-129-605 <br />' LCS QC Spike Spike Dup QC QC <br /> Compounds % Rec Limits % Rec. % Rec Limits RPD Limits <br /> Benzene 99 80-120 93 94 39-150 107 0-30 <br />' Toluene 100 80-120 100 100 46-148 000 0-30 <br /> Ethylbenzene 102 80-120 I00 100 32-160 000 0-30 <br />' Gasoline 108 80-120 101 103 50-150 2 0 0-30 <br /> ND means Not Detected <br /> Reporting Limit(RL)=Method Detection Limit(MDL)x Dilution Factor <br /> 1 <br />