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Sequoia 6W Chesapeake Drive Redwood Clty,CA 94063 (650)364-9600 FAX(6r0)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (9Z5)988-%W FAX(925)988-%73 <br /> 819 Striker Avenue,Suite 8 Sacramento.CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd.North,Ste. D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <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: 4/28/99 <br /> Polychlorinated Biphenyls by EPA Method 8080A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Batch: 9040284 Date Prepared: 4123/99 Extraction Method: EPA 3550A <br /> Blank 9040284-131,K] <br /> PCB-1016 4/26/99 ND ug/kg 20.0 <br /> PCB-1221 ND 80.0 <br /> PCB-1232 ND 20.0 <br /> PCB-1242 ND 20.0 <br /> PCB-1248 ND 20.0 <br /> PCB-1254 ND 20.0 <br /> PCB-1260 ND 20.0 <br /> Surrogate: TCMX 12.5 12.9 40.0-140 103 <br /> Surrogate: DCB 12.5 11.6 40.0-140 92.8 <br /> Ldcs M9289 BSI <br /> PCB-1260 4/26/99 125 104 ug/kg 40.0-140 83.2 <br /> ogate: TCMX 12.5 12.8 „ 40.0-140 102 <br /> ogate: DCB 12.5 12J 40.0-140 96.8 <br /> Matrix Spike 9040284-MS1 S204251-01 <br /> PCB-1260 4/26/99 125 ND 109 ug/kg 40.0-140 87.2 <br /> Surrogate: TCMX 12.5 14.0 40.0-140 112 <br /> Surrogate: DCB 12.5 12.1 40.0-140 96.8 <br /> Matrix Spike D«n 9040284-MSDI 5904251-01 <br /> PCB-1260 4126199 125 ND 96.2 ug/kg 40.0-140 77.0 50.0 12.4 <br /> Surrogate: TCMX 12.5 12.9 40.0-140 103 <br /> Surrogate: DCB 12.5 I L6 40.0-140 92.8 <br /> 'MJIKuoia Analytical-Sacramento *Refer 10 end of report for text of notes and definitions. <br /> c" <br /> Sandra R. Hanson,Client Services Kepresentative Page 14 of 19 <br />