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SIERRA LABORATORIES INC <br />' GHH Engineering, Inc. Date Sampled 7111100 <br /> 808.1 Old Auburn Road, Suite E Date Received 7/13/00 <br /> Citrus Heights, CA 95610 Date Prepared 7/21/00 <br />' Date Analyzed 712IDO <br /> ] <br /> Sierra Project No 0007-227 Analyst 7/21 <br /> Client Project ID USA-Stockton/5007 10 <br />' Mw <br /> Sample Matrix Water Report Date- 7125100 <br /> EPA METHOD 8020-BTEX/EPA METHOD 80li-GAsollne Range Hydrocarbons(C4-C12) <br />' (Purge&Trap) <br /> Concentration,ug/l <br /> Practical <br /> Client Sample No MW-6P MW-4P MW-5P MW-3P MW-1 MW-2P MW-!P MW-2 Quantitation <br /> Limit, <br /> Sierra Sample No 21278 21279 21280 21281 21282 21283 21284 21285 Lill <br /> COMPOUNDS <br /> Benzene ND ND ND ND ND 70 ND ND 05 <br /> oluene _ ND ND ND 27 46 5 8 ND ND 05 <br /> Ethylbenzene -�__ND ND ND ND ND 42 i i ND 05 <br /> otal Xylenes ND ND ND ND 070 79 ND ND 0 5 <br /> MTBE ND ND ND 65 28 31 ND ND 50 <br /> line _ND ND ND 68 160 1300 ND ND 50 <br /> Dilution Factor I I 1 i 1 1 1 1 QC Limits <br /> /o Surrogate Recovery 100 99 106 107 111 120 83 112 70-125 <br /> Quality Assuiance/Quality Control Data <br /> C Sample€D 000721-BL <br /> LCS Spike Spike Dup QC QC <br /> lEtasoline <br /> ompounds % Rec _%Ree % Rec Limits RPD Limits <br /> enzene 84 86 100 39-150 16 0-30 <br /> oluene _ _ 84 86 100 46-148 16 0-30 <br /> hylbenzene 84 86 101 32-160 16 0-30 <br /> 83 1 101 100 50-150 0 5 0-30 <br /> Q me ins Not Detected <br /> Reporting Law{RL)—Pmctivil Qunnnt1[iun Unit(PQL)x Ddwion Faiaw <br /> 3 <br />