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SIERRA LABORATORIES INC <br /> The Park Corporation Date Sampled 1/23/97 <br /> 8084 Old Auburn Road Date Received 1129/97 <br /> Citrus Heights, CA 95610 Date Prepared 1/29/97 <br /> Date Analyzed. 1129/97 <br /> Sierra Project No 970I-241 Analyst SM <br /> Client Project ID- 505945/USA-Lodi <br /> Sample Matrix Water Report Date 1130/97 <br /> tEPA METHOD 8020-BTEX/ <br /> EPA METHOD 8015 MODIFIED-GASOLINE RANGE HYDROCARBONS (C4-C12) <br /> (PURGE AND TRAP) <br /> Concentration, p.g/l <br />' Method <br /> Client Sample No : MW-3 MW-2 MW-I MW-8 Detection <br /> Limit, <br /> Sierra Sample No : 01155 01156 01157 01158 pg/I <br /> COMPOUNDS <br /> Benzene NO NO ND NO 05 <br /> Toluene ND ND ND 67 05 <br /> Ethylbenzene ND NO ND NO 05 <br /> Total Xylenes ND NO NO 064 05 <br /> MTBE ND NO ND 90 50 <br /> Gasoline Range ND NO NO 58 50 <br /> Dilution Factor 1 1 1 1 QC Limits <br /> % Surrogate Recovery <br /> 4-Bromofluorobenzene 80 85 90 90 70-125 <br /> 1 <br /> Quality Assurance/Quality Control Data <br />' QC Sample ID 9701-200-00901 <br /> LCS Spike Spike Dl—up QC QC <br /> Compounds % Ree % Ree % Rec Limits RPD Limits <br /> Benzene 94 98 100 39-150 23 0-30 <br /> Toluene 96 100 102 46-148 27 0-30 <br /> Ethylbenzene 93 100 102 32-160 27 0-30 <br /> Gasohne 192 96 84 50-150 13 0-30 <br /> ND means Not Detected <br />' Reporting Limit(RL)=Method Detection Limit(MDL)e Dilution Factor <br />