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SIERRA LABORATORIES INC <br /> A <br /> GHH Engineering, Inc. Date Sampled: 1016197 <br /> ' 8084 Old Auburn Road <br /> Date Received; 1018/97 <br /> Citrus Heights, CA 95610 Date Prepared 10/9197 <br /> Date Analyzed 10/9/97 <br /> Sierra Project No.: 9710-068 Analyst: SM <br /> Client Project ID: USA Lodi/5059.10 <br /> Sample Matrix; Soil Report Date: 10/13/97 <br /> EPA METHOD 8020-BTEX/EPA METHOD 8015-Gasoline Range Hydrocarbons (C4-C12) <br /> (Purge &Trap) <br /> Concentration, mg/kg <br /> Method <br /> Client Sample No.: P-1 P-2 P-3 P-4 P-5 P-6 P-7 P-8 P-9 P-10 Detection <br /> Limit, <br /> Sierra Sample No.: 17601 17602 17603 17604 17605 17606 17607 17608 17609 17610 mg/kg <br /> COMPOUNDS: <br /> Benzene ND 0.15 ND ND ND ND ND 8.0 9.0 ND 0.003 <br /> Toluene 1.1 2.1 0.0054 1.2 25 2.9 ND 170 190 ND 0.003 <br /> Ethylbenzene 0.45 0.85 0.0045 0.60 12 0.85 ND 48 56 ND 0.003 <br /> Total Xylenes" 3.2 5.4 0.039 4.4 140 0.85 ND 280 320 ND 0.003 <br /> MTBE 0.85 0.25 0.033 ND 2.0 5.0 ND 150 150 0.013 0.005 <br /> Gasoline 50 56 0.35 180 1000 90 ND 2600 300 ND 0.05 <br /> Dilution Factor 50 50 1 50 250 50 it 1000 1000 1 QC Limits <br /> % Surrogate Recovery: <br /> a,a,a-Trifluorotoluene ..110 120 110 120 1 120 110 1 100 120 120 1 100 35-135 <br /> Quality Assurance/Quality Control Data <br /> QC Sample ID: 9710-37-17334 <br /> LCS Spike Spike Dup IQC <br /> QC <br /> Compounds % Rec. % Rec. %Rec. Limits RPD Limits <br /> Benzene + 110 88 108 39-150 20 0-30 <br /> Toluene 108 86 108 46-148 22 0-30 <br /> Ethylbenzene 105 86 108 32-160 22 0-30 <br /> Gasoline ? 109 120 108 50-150 11 0-30 <br /> ND means Not Detected <br />` ( Reporting Limit(RL) = Method Detection Limit(MDL)z Dilution Factor <br />�r <br /> ij <br />