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GeoAnalytical Laboratories, Inc. <br />2300 Maryann Dr. Turlock, CA 95380 Phone (209) 669-0100 Fax(209)668-8516 <br />email: tob.geo@att.net <br />Report # V910224 Project: 25327 Jones Road, Escalon CA 95320 <br />San Joaquin County Environmental Health <br />600 East Main Street PO#: PA# 197375 <br />Stockton, CA 95202 <br />Volatile Organic Chemistry - Quality Control <br />GeoAnalytical Laboratories, Inc. <br />Date: 09/10/09 <br />Date Reed: 09/02/09 <br />Reporting Spike Source %REC RPD <br />Analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch V002488 - EPA 5030 <br />62.6 <br />5.0 ug/kg <br />Prepared & Analyzed: 09/05/09 <br />104 <br />LCS (V0024WBSl) <br />3 <br />20 <br />Benzene <br />63.5 <br />5.0 " <br />l,l-Dichloroethane <br />64.7 <br />5.0 <br />u g/kg 60.00 <br />108 <br />80-120 <br />Benzene <br />63.4 <br />5.0 <br />60.00 <br />106 <br />80-120 <br />Methyl tert Butyl Ether (MTBE) <br />58.9 <br />5.0 <br />60.00 <br />98 <br />80-120 <br />Monochlorobenzene <br />60.3 <br />5.0 <br />60.00 <br />100 <br />80-120 <br />Toluene <br />61.3 <br />5.0 <br />" 60.00 <br />102 <br />80-120 <br />Trichloroethylene <br />64.0 <br />5.0 <br />60.00 <br />107 <br />80-120 <br />Surrogate: 1,2-Dichloroethane-d4 <br />10.7 <br />20.2 <br />10.00 <br />104 <br />72-131 <br />Surrogate:2-Bromo-l-Chloropropane <br />19.6 <br />20.00 <br />98 <br />71-134 <br />Surrogate:4-Bromoflucrobenzene <br />19.5 <br />71-134 <br />20.00 <br />98 <br />74-132 <br />LCS Dap (V0024MBSDI) <br />1,1-Dichloroethane <br />62.6 <br />5.0 ug/kg <br />60.00 <br />104 <br />80-120 <br />3 <br />20 <br />Benzene <br />63.5 <br />5.0 " <br />60.00 <br />106 <br />80-120 <br />0.02 <br />20 <br />Methyl tert•Butyl Ether (MTBE) <br />80.1 <br />5.0 <br />60.00 <br />133 <br />80-120 <br />30 <br />20 <br />Monochlorobenzene <br />62.8 <br />5.0 <br />60.00 <br />105 <br />80-120 <br />4 <br />20 <br />Toluene <br />61.7 <br />5.0 <br />60.00 <br />103 <br />80-120 <br />0.7 <br />20 <br />Trichloroethylene <br />62.3 <br />5.0 " <br />60.00 <br />104 <br />80-120 <br />3 <br />20 <br />Surrogate: 1.2-Diehloroethane-d4 <br />20.2 <br />10.00 <br />101 <br />71-132 <br />Surrogate:2-Bromo-l-Chloropropane <br />19.4 <br />20.00 <br />97 <br />71-134 <br />Surrogate:4-BromoJluorobenzene <br />19.6 <br />10.00 <br />98 <br />74-132 <br />Batch V002519 - EPA 3030B Prepared & Analyzed: 09/09/09 <br />Blank (VO02519-BLKI) <br />1,1,1,2 -Tetrachloroethane <br />ND <br />1.0 U911- <br />91L1,1,1-Trichloroethane <br />1, 1, 1 -Trichloroethane <br />ND <br />1.0 " <br />1,1,2,2 -Tetrachloroethane <br />ND <br />1.0 " <br />1,1,2 -Trichloroethane <br />ND <br />1.0 " <br />I,I-Dichloroethane <br />ND <br />1.0 " <br />1.1-Dichloroethylene <br />ND <br />1.0 " <br />i,l-Dichloropropene <br />ND <br />1.0 " <br />1,2,3-Trichlorobenzene <br />ND <br />1.0 " <br />1,2,3-Trichloropropane <br />ND <br />1.0 " <br />1,2,4-Trichlorobenzene <br />ND <br />1.0 " <br />1,2,4-Trimethylbcnzene <br />ND <br />1.0 " <br />1,2-Dibromo-3-chtoropropane (DBCP) <br />ND <br />1.0 " <br />1,2 -Dichlorobenzene <br />ND <br />1.0 " <br />1,2-Dichloreethane <br />ND <br />0.5 " <br />1,2-Dichloropropane <br />ND <br />1.0 " <br />Certification # 2585 <br />