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• 6W Chesapeake Drive Redwood City,CA 94063 {650)3649600 FAX(650)364-9233 <br /> Sequoia 404 N.Wig&Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 455 McDowell Blvd. North,Ste. D Petaluma,CA 94954 (707) 792.1865 FAX(707)792-0342 <br /> Analytical '.551 551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> is <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 4/13/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received: 4/14/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 4/19/99 <br /> Total Metals by EPA 6000/7000 Series Methods <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Specific Reporting <br /> Analyte Number Prepared Analyzed Method Limit Result Units Notes* <br /> STP-2(compQsite) S904201-01 Sail <br /> Lead 9040167 4/15199 4/15/99 EPA 6010A 10.0 ND mg/kg D <br /> WQ-1 (composite) 5904201-02 &4l <br /> Antimony 9040167 4/15/99 4/15/99 EPA 6010A 10.0 ND mg/kg D <br /> Lead EPA 6010A 10.0 29.8 D <br /> Arsenic EPA 6010A 10.0 ND D <br /> Barium EPA 6010A 10.0 117 D <br /> Beryllium EPA 6010A 1.00 ND D <br /> Cadmium EPA 6010A 1.00 ND D <br /> Chromium EPA 6010A 1.00 19.9 D <br /> Cobalt EPA 6010A 4.00 9.00 D <br /> Copper EPA 6010A 1.00 22.5 D <br /> Lead EPA 6010A 10.0 29.8 D <br /> #lybdenum " EPA 6010A 4.00 ND " D <br /> kel EPA 6010A 4.00 21.6 D <br /> enium EPA 6010A 10.0 ND D <br /> Silver EPA 6010A 1.00 ND D <br /> Thallium EPA 6010A 10.0 ND D <br /> Vanadium EPA 6010A 4.00 30.8 D <br /> Zinc EPA 6010A 2.00 42.3 D <br /> Mercury 9040168 4/16/99 EPA 7471 A 0.0200 0.125 " <br /> STP-3(composite) S904201-03 S4ll <br /> Lead 9040167 4115/99 4/15/99 EPA 6010A 10.0 75.6 mg/kg D <br /> STP-4(composi_,tel $M201-04 SAW <br /> Lead 9040167 4115/99 4/15/99 EPA 6010A 10.0 50.7 mg/kg D <br /> uoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> C� <br /> 47 <br /> Snra R. Hanson,C]imt Services Representative Page 3 of 12 <br />