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' 680 Chesapeake Drive Redwood City CA 94063 (650)361-9600 FAX(650)364-9233 <br /> Se uoia 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)9Z1-0100 <br /> 4TAnalytical 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 /> • <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 3/10/99 to 3/1 U99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 3/12/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/26/99 <br /> Total Purgeable'Hydrocarbons(C6-C12),BTEX-and+MTBE by DHS LUFT/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, 9030250 Date Prepared. 3/19199 Extraction Method, EPA 5030B(EM <br /> 131ank 90-10250-ULK1 <br /> Purgeable Hydrocarbons 3/19199 ND ug/1 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND Soo <br /> Surrogate a,a,a-Trifluorotoluene 10 0 953 600-140 953 <br /> LCS 9030250-BSI <br /> Benzene 3119/99 100 901 ug/l 700-130 90 1 <br /> Toluene 10 0 919 700-130 919 <br /> Ethylbenzene 10 0 903 70 0-130 903 <br /> 0 lenes(total) 300 270 700-130 900 <br /> thy[cert-butyl ether 10 0 107 700-130 107 <br /> Surrogate a a a-TrVtuorotoluene 100 949 600-140 949 <br /> Matrix Spike 9030250-MS1 5903201-06 <br /> Benzene 3/19/99 10 0 ND 895 ug/l 600-140 895 <br /> Toluene 10 0 ND 902 600-140 902 <br /> Ethylbenzene 10 0 ND 891 600-140 891 <br /> Xylenes(total) 300 ND 268 600-140 893 <br /> Methyl tert-butyl ether 10 0 ND 106 600-140 106 <br /> Surrogate a,a,a-Trifluorotoluene 100 911 600-140 912 <br /> Matrix Spike Duo 9030250-MSD/ 5903201-06 <br /> Benzene 3/19/99 too ND 8 86 ug/l 600-140 886 25 0 101 <br /> Toluene too ND 888 600-140 888 250 156 <br /> Ethylbenzene 100 ND 8 82 600-140 88 2 25 0 102 <br /> Xylenes(total) 30 0 ND 26 6 600-140 88 7 25 0 0 674 <br /> Methyl tert-butyl ether too ND I 1 2 600-140 112 250 550 <br /> Surrogate a a a-Trifluorotoluene 100 901 600-140 901 <br /> Batch, 9030252 Date Prepared. 3/19/99 Extraction Metb9d. EPA 5030B <br /> Blank 29 DIA1 <br /> Purgeable Hydrocarbons 3/19199 ND ug/I 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> ethyl tert-butyl ether ND 500 <br /> equoia Analytical-Sacramento 'Refer to end of report for text of notes and definitions <br /> 52L,z� P &1222LI2� I <br /> Sandra R Hanson,Client Services Representative Page 7 of 1 <br />