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Sequoia 1455 McDowell Blvd. North, Ste. D <br /> Petaluma, CA 94954 <br /> (707) 792-1865 <br /> Analytical FAX (707) 792-0342 <br /> �„ F <br /> Cambria Environmental Project: Shell Oil Co. Sampled: 8/11/99 to 8/12/99 <br /> 270 Perkins St. Project Number: 440 W Charter,Stockton Received: 8/13/99 <br /> Sonoma,CA 95476 Project Manager: Aubrey Cool Reported: 8/20/99 <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: 9080367 Date Prepared: 8/16/99 Extraction Method: EPA 3050B <br /> Blank 9080367-BLKI <br /> Lead 8/17/99 ND mg/kg 7.50 <br /> LCS 9080367-BSI <br /> Lead 8/17/99 50.0 45.6 mg/kg 80.0-120 91.2 <br /> Matrix Spike 9080367-MSI P908317-05 <br /> Lead 8/17/99 43.9 8.86 43.5 mg/,kg 75.0-125 78.9 <br /> Matrix Spike Dup 9080367-MSD1 P908317-05 <br /> Lead 8/17/99 42.4 8.86 43.1 mg/kg 75.0-125 83.1 20.0 5.19 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions. <br /> Page 13 of 16 <br />