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CALIFORNIA LABORATORY SERVICES <br />Page 7 of 8 12/09/10 12:53 <br />Kleinfelder (Stockton) Project: 76 GDS Repipe <br />2001 Arch -Airport Road, suite 100 Project Number: 114595 CLS Work Order #: CTLO144 <br />Stockton, CA 95206 Project Manager: Joseph D. Zilles COC #: 19343 <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Reporting Spike Source %REC RPD <br />' nalste Result Limit Units Level Result %REC Limits RPD Limn Notes <br />Batch CT09113 - EPA 5030 Soil MS <br />Blank (CT09113-BLKI) <br />Prepared & Analyzed: 12/08/10 <br />Di -isopropyl ether <br />ND <br />50 <br />µg/kg <br />Ethyl tert-butyl ether <br />ND <br />50 <br />" <br />Methyl tert-butyl ether <br />ND <br />5.0 <br />" <br />tert-Amyl methyl ether <br />ND <br />5.0 <br />" <br />tert-Butyl alcohol <br />ND <br />50 <br />" <br />Benzene <br />ND <br />5.0 <br />" <br />Ethylbenzene <br />ND <br />5.0 <br />" <br />Toluene <br />ND <br />5.0 <br />" <br />Xylenes (total) <br />ND <br />10 <br />" <br />Surrogate: Toluene -d8 <br />29.1 <br />30.0 97 60-140 <br />LCS (CT09113-BSI) <br />Prepared & Analyzed: 12/08/10 <br />Methyl tert-butyl ether <br />21.2 <br />5.0 <br />pg/kg <br />20.0 106 60-140 <br />Surrogate: Toluene -d8 <br />35.6 <br />30.0 119 60-140 <br />LCS Dup (CT09113-BSDI) <br />Prepared & Analyzed: 12/08/10 <br />Methyl tert-butyl ether <br />15.7 <br />5.0 <br />µg/kg <br />20.0 78 60-140 30 30 <br />Surrogate: Toluene -d8 <br />30.8 <br />1130.0 <br />103 60-140 <br />Matrix Spike (CT09113-MS1) <br />Source: CTLO144-01 <br />Prepared & Analyzed: 12/08/10 <br />Methyl tert-butyl ether <br />33.2 <br />5.0 <br />µg/kg <br />20.0 ND 166 60-140 QM -7 <br />Surrogate: Toluene -d8 <br />45.4 <br />1130.0 <br />151 60-140 QM -7 <br />Matrix Spike Dup (CT09113-MSDI) <br />Source: <br />CTLO144-01 <br />Prepared & Analyzed: 12/08/10 <br />Methyl tert-butyl ether <br />16.3 <br />5.0 <br />µg/kg <br />20.0 ND 82 60-140 68 30 QM -7 <br />Surrogate: Toluene -d8 <br />30.1 <br />" <br />30.0 100 60-140 <br />CA DOHS ELAP Accreditation/Registration Number 1233 <br />3249 Fitzgerald Road Rancho Cordova, CA 95742 www'.californialab.com 916-638-7301 Fax: 916-638-4510 <br />