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- I <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (630) 364-9600 FAX(650)364-9233 <br /> 404 IN Wiget 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 /> 45 342 <br /> �„f Analytical 1551 IndDowall oadBlvNorth Ste D San ICarlosumaC A994070-4 1 1 1 (650)232-4954 (707) 9600 FAX(650)232 865 FAX(707)792 9612 <br /> 1* <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 3118199 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G600-019-04 Received 3/18/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/23/99 <br /> Volatile Organic Compounds by EPA Method 8010B/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 /> Matrix Spike 9030283-MSI S903250-01 <br /> Chlorobenzene 3/22199 400 ND 520 ug/kg 600-140 130 <br /> 1,1-Dichloroethane 200 ND 218 600-140 109 <br /> Trichloroethene 200 ND 238 600-140 119 <br /> Surrogate Bromochloromethane 200 262 600-140 131 <br /> Surrogate 2-Chlorotoluene 200 254 600-140 127 <br /> Matrix Spike Duo 9030283-MSD1 S903250-01 <br /> Chlorobenzene 3/22/99 400 ND 530 ug/kg 600-140 133 25 0 2 28 <br /> 1,1-Dlchloroethane 200 ND 218 600-140 109 25 0 0 <br /> Trichloroethene _200 ND 240 600-140 120 25 0 0 837 <br /> Surrogate Bromochloromethane 200 282 " 600-140 141 2 <br /> Surrogate 2-Chlorotoluene 200 260 600-140 130 <br /> • <br /> Stw- <br /> quota Analytical -Sacramento *Refer to end of report far text of notes and defutlons <br /> Sandra R Hanson,Client Services Representative page 8 of 9 <br />