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o-qco,� laboratories 2905 Railroad Ave. Ceres, CA 95307 (209)581-9280 Fax (209)581-9282 <br />Stockton Service <br />Project Number: 2498 East Main <br />--L—J— <br />N/A <br />Project Namc; EI Camino Tire <br />Work Order No.: <br />Stockton, CA NIA <br />Project Manager: Don Light <br />H701052 <br />Oxygenates - Method: EPA 8260B <br />Reporting <br />Analyte Result <br />Limit Units Dilution <br />Analyzed <br />Method Notes <br />NE @16' (H701052-05) Soil Sampled: 25 -Jan -0712:55 Received: 25 -Jan -07 16:21 <br />t -Butanol ND <br />0.050 mg/kg l <br />31 -Jan -07 <br />EPA 8260B <br />Methyl tert-Butyl Ether ND <br />0.005 <br />Di-lsopropyl Ether ND <br />0.005 " <br />Ethyl tert-Butyl Ether ND <br />0.005 <br />" <br />tent -Amyl Methyl Ether ND <br />0,005 <br />Surr. Rea.: <br />103% <br />Stockpile JA (11701052-06) Soil Sampled: 25 -Jan -07 12:59 <br />Received: 25 -Jan -0716:21 <br />t -Butanol ND <br />0.050 mg/kg 1 <br />3l -Jan -07 <br />EPA 826013 <br />Methyl tert-Butyl Ether ND <br />0.005 <br />Di -Isopropyl Ether ND <br />0.005 <br />Ethyl tert-Butyl Ether ND <br />0,005 <br />tert-Amyl Methyl Ether ND <br />0.005 <br />" <br />Surr. Ree.: <br />105% <br />" <br />Stockpile 18 (H701052-07) Soil Sampled: 25 -Jan -07 13:10 <br />Received: 25 -Jan -07 16:21 <br />t -Butanol ND <br />0.050 mg/kg E <br />3l -Jan -07 <br />EPA 8260B <br />Methyl tert-Butyl Ether ND <br />0.005 <br />Di -Isopropyl Ether ND <br />0.005 " <br />Ethyl tert Butyl Ether ND <br />0.005 " <br />tert-Amyl Methyl Ether ND <br />0.005 " <br />Surr. Rae,: <br />109% <br />Pump West/36" (H701052-08) Soil Sampled: 25 -Jan -07 13:15 Received: 25 -Jan -07 16:21 <br />t -Butanol ND <br />0.050 mg/kg 1 <br />31 -Jan -07 <br />EPA 8260B <br />Methyl tert-Butyl Ether ND <br />0.005 <br />Di-lsopropyl Ether ND <br />0.005 ° <br />Ethyl tert-Butyl Ether ND <br />0.005 <br />" <br />tent -Amyl Methyl Ether ND <br />0.005 <br />" <br />Surr. Rea.: <br />108% <br />" <br />Approved By <br />Argon Laboratories, Inc. California D.O.H.S. Cert. 42359 <br />Page 3 of 16 <br />