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SIERRA LABORATORIES INC <br /> Park Environmental Corporation Date Sampled: 10/6195 <br /> 8084 Old Auburn Road Date Received: 10/10/95 <br /> Citrus Heights, CA 95610 Date Prepared: 10/12 and 10/13/95 <br /> Date Analyzed: 10112 and 10/13/95 <br /> ' Sierra Project No.: 9510-068 Analyst: SM <br /> Client Project ID: USA-Stockton <br /> Sample Matrix: Water Report Date: 10123/95 <br /> 1 <br /> EPA METHOD 8020-BTEXI <br /> EPA METHOD 8015 MODIFIED-GASOLINE RANGE HYDROCARBONS (C4-C12) <br /> (PURGE AND TRAP) <br /> Concentration,pg/l <br /> ' Method <br /> Client Sample No.: MW-2P MW-31? MW-5P MW-6P Detection <br /> Limit, <br /> Sierra Sample No.: 8610 8611 8612 8613 pg/1 <br /> COMPOUNDS: <br /> Benzene 51 070 ND ND 05 <br /> Toluene 41 35 ND ND 05 <br /> Ethylbenzene 24 ND ND ND 05 <br /> Total Xylenes 3 0 1 I i ND ND 05 <br /> ' Gasohne 530 270 ND ND 50 <br /> ' Dilution Factor 1 1 1 i :60f-13O] <br /> Surrogate Recovery <br /> 1-Chloro-2-fluorobenzene 80 95 93 91 <br /> 1=QCSamPle1D: 9510-94-8725Quality AssurancelQuality Control Data <br /> LCS Spike Spike Dup QC QC <br /> Compounds % Rec. % _Rec. _ % Rec. Limits RPD Limits <br /> ' Benzene 100 96 100 39-150_4 1 0-30 <br /> Toluene 93 91 94 46-148 30 0-30 <br /> Ethylbenzene 91 88 91 32-160 3 1 0-30 <br /> Gasoline 107 98 103 150-150143 0-30 I <br /> ND means Not Detected <br /> Reporting Limit(RL)=Method Detection Limit(MDL)x Dilution Factor <br />