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Sequoia <br />wiw-r Analytical <br />1455 McDowell Blvd. North, Ste. D <br />Petaluma, CA 94954 <br />(707)792-1865 <br />FAX (707) 792-0342 <br />Cambria Environmental <br />Project: <br />TFD 4B-28 <br />Sampled: <br />11/2/99 <br />270 Perkins St. <br />Project Number: <br />3011 West Benjamin Holt Dr. <br />Received: <br />11/3/99 <br />Sonoma, CA 95476 <br />Project Manager: <br />Bob Perlowski <br />Reported: <br />11/9/99 <br />Volatile Organic Compounds by EPA Method 8260B/Quality Control <br />Sequoia Analytical - Petaluma <br />Date Spike Sample QC Reporting Limit Recov. RPD RPD <br />Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes' <br />Batch: 9110066 <br />Date Prepared: 11/2/99 <br />Extraction Method: EPA 5035 <br />Blank <br />9110066-BLK1 <br />Tert-amyl methyl ether <br />11/2/99 <br />ND <br />mg/kg 0.00500 <br />Ten -amyl methyl ether <br />ND <br />0.00500 <br />Benzene <br />ND <br />0.00500 <br />Tert-butyl alcohol <br />ND <br />0.100 <br />Tert-butyl alcohol <br />ND <br />0.100 <br />Di -isopropyl ether <br />ND <br />0.00500 <br />Di -isopropyl ether <br />ND <br />0.00500 <br />1,2-Dibromoethane (EDB) <br />ND <br />0.00500 <br />1,2-Dibromoethane(EDB) <br />ND <br />0.00500 <br />1,2-Dichloroethane <br />ND <br />0.00500 <br />1,2-Dichloroethane <br />" <br />ND <br />0.00500 <br />Ethanol <br />" <br />ND <br />0.200 <br />Ethanol <br />P. <br />ND <br />" 0.200 <br />Ethylbenzene <br />ND <br />0.00500 <br />Ethyl tert-butyl ether <br />ND <br />0.00500 <br />Ethyl tert-butyl ether <br />N D <br />0.00500 <br />Methyl tert-butyl ether <br />ND <br />0.00500 <br />Methyl cert -butyl ether <br />ND <br />0.00500 <br />Toluene <br />ND <br />0.00500 <br />Xylenes (total) <br />ND <br />0.00500_ <br />Surrogate. Dibromofluoromethane <br />0.0500 - <br />0.0530 <br />_ <br />80.0-120 <br />106 <br />Surrogate: Dibromofluoromethane <br />0.0500 <br />0.0530 <br />80.0-120 <br />106 <br />Surrogate: l,2-Dichloroethane-d4 <br />0.0500 <br />0.0533 <br />80.0-120 <br />107 <br />Surrogate: 1,2-Dichloroethane-d4 <br />0.0500 <br />0.0533 <br />80.0-120 <br />107 <br />Surrogate: Toluene -d8 <br />0.0500 <br />0.0547 <br />81.0-117 <br />109 <br />Surrogate. Toluene -d8 <br />0.0500 <br />0.0547 <br />81.0-117 <br />109 <br />Surrogate: 4-BromoJluorobenzene <br />0.0500 <br />0.0539 <br />74.0-121 <br />108 <br />Surrogate: 4-Bromofluorobenzene <br />0.0500 <br />0.0539 <br />74.0-121 <br />108 <br />Blank <br />9110066-BLK2 <br />Tert-amyl methyl ether <br />11/3/99 <br />ND <br />mg/kg 0.00500 <br />Tert-amyl methyl ether <br />ND <br />0.00500 <br />Benzene <br />ND <br />0.00500 <br />Tert-butyl alcohol <br />ND <br />0.100 <br />Tert-butyl alcohol <br />ND <br />0.100 <br />Di -isopropyl ether <br />ND <br />0.00500 <br />Di -isopropyl ether <br />ND <br />0.00500 <br />1,2-Dibromoethane (EDB) <br />ND <br />0.00500 <br />1,2-Dibromoethane (EDB) <br />ND <br />0.00500 <br />1,2-Dichloroethane <br />ND <br />0.00500 <br />Sequoia Analytical - Petaluma 'Refer to end of report for text of notes and definitions. <br />Page 15 of 20 <br />