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1455 McDowell Blvd North,Ste D <br /> Petaluma,CA 94954 <br /> Sequoia (707)792-1865 <br /> FAX(707)792-0342 <br /> Analytical wwwsequotalabs com <br /> Cambria Environrnental Project Eqwva 10d <br /> 270 Perkins St Project Number 440 West Charter Way,Stockton Reported <br /> Sonoma CA,95476 Project Manager Aubrey Cool 12/15/00 11 11 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporung Spike Source %REC RPD <br /> Analyte Result Limit Units level Result %REC Limits RPD limit Notes <br /> Batch OK17014-EPA 5030B [MeOH <br /> LCS(OK17014-BS2) _ Prepared 11/17/00 Analyzed 11/20/00 <br /> Methyl tent-butyl ether 3 13 010 mg/kg 250 125 70-130 <br /> Surrogate Dibromofluoromethane 250 250 100 50-150 <br /> Surrogate 12-Dichloroethane-d4 255 250 102 50-150 <br /> Matrix Spike(OK17014-MS1) Source W011354_21_ _ Prepared 11/16/00 Analyzed 11/17/00 <br /> Methyl tert-butyl ether 273 010 mg/kg 2 50 ND 109 60-140 <br /> Surrogate Dibromofluoromethane 245 " 250 980 50-150 <br /> Surrogate 12-Dichloroethane-d4 155 150 101 50-150 <br /> Matrix Spike Dup(OK17014-MSD1) Source W011354-21 ---Prepared 11/16/00 Analyzed 11/17/00 <br /> Methyl tert-butyl ether 288 010 mg/kg 250 ND 115 60-140 535 25 <br /> ogate Dibromofluoromethane 250 150 100 50-150 <br /> agate 1 2-Dichloroethane-d4 260 250 104 50-150 <br /> Batch OK17015-EPA 5030B McOH <br /> Blank(OK1 7015-BLK1) ___Prepared 11/17/00 Analyzed 11/20/00 <br /> Ethanol ND 25 mg/kg <br /> tert-Butyl alcohol ND 25 " <br /> Methyl tert-butyl ether ND 010 " <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tert-butyl ether ND 010 " <br /> 1,2-Dichloroethane ND 010 " <br /> tert-Amyl methyl ether ND 010 " <br /> 1,2-Dibromoethane ND 010 " <br /> Surrogate Dibromofluoromethane 250 " 2 50 100 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 260 250 <br /> 104 50-150 <br /> quota Amalytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Ihts analytical report must be reproduced in its entirety <br /> Page 30 of 32 <br />