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,!D Sequoia <br />WO Analytical <br />.J 1455 McDowell Blvd. North, Ste. D <br />Petaluma; CA,94994 <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 />Total Metals by EPA 6000/7000 Series Methods/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: 9110105 <br />Date Prepared: 11/3/99 <br />Extraction Method: EPA 3050B <br />Blank <br />9110105-BLKI <br />Lead <br />11/3/99 <br />ND <br />mg/kg 7.50 <br />LCS <br />9110105 -BSI <br />Lead <br />11/3/99 50.0 <br />48.6 <br />mg/kg 80.0-120 97.2 <br />Matrix Spike <br />9110105-MS1 P911082-01 <br />Lead <br />11/4/99 39.7 129 <br />163 <br />mg/kg 75.0-125 85.6 <br />Matrix Spike Duo <br />9110105-MSDI P911082-01 <br />Lead <br />11/4/99 48.1 129 <br />151 <br />mg/kg 75.0-125 45.7 20.0 60.8 2 <br />Sequoia Analytical - Petaluma *Refer to end of report for text of notes and definitions. <br />Page 14 of 20 <br />