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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9133 <br /> 404 N.Wlget 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 /> Analytical 15S1 IndcDoriaIIR Blvd.North,Ste. D San Peta(uma,CA Carlos A94954 (707)94070-4 1 1 1 (650)232-9865 FAX(707)792-0342 <br /> 600 FAX(650) 232-9612 <br /> SECOR International Project: ARCO 4493,Stockton,CA Sampled: 4/[3/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received- 4/14199 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Reported: 4128/99 <br /> Conventional Chemistry Parameters by APHA/EPA Methods/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Anal zed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Batch: 90AD183 Date ftepared: 4/17/92 <br /> Extraction Method: General Preparation <br /> DWI <br /> 9-Q40183-BLKI <br /> TRPH 4/18/99 ND mg/kg 50.0 <br /> LF-S QQ4Q1$3-)3S1 <br /> TRPH 4/18/99 500 450 mg/kg 70.0-130 90.0 <br /> Alatrix Spike 9040183-MSI S904203-03 <br /> TRPH 4/18/99 500 247 635 mg/kg 60.0-140 77.6 <br /> Matrix Spike Dup 9040183-MSDI S904203-03 <br /> TRPH 4/18/99 500 247 530 mg/kg 60.0-140 56.6 30.0 31.3 3,5 <br /> 0 <br /> quoia Analytical -Sacramcnto *Refer to end of report for text of notes and definitions. <br /> Sandra R. Hanson,Client Services Representative Page 18 of 19 <br />