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1 680 Chesapeake Drive Redwood City CA 94063 (650)3649600 FAX(650)364-9233 <br /> ` Sequoia 404 N Wlget lane Walnut Geek.CA 94598 (925)988-9600 FAX(92S)988-9673 _ <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)792-1665 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> i <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 3/10/99 to 3/11/99 <br /> 9912 Business Park Drive,Ste 100 Project Number NIA Received 3/12199 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3126199 <br /> Total Purgeable Hydrocarbons;(C6-C12),'MTEX and NMVby DHS LUFT/Quality Control <br /> Sequoia,Analyt:cal-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> IAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank(continued) 9030252-BLKI <br /> Surrogate a a a-Trifluorotoluene 3/19/99 100 924 ug/1 60 0-140 92 4 <br /> LICS 9030252-BSI <br /> Benzene 3119/99 10 0 890 ug/l 700-130 89 0 <br /> Toluene 100 879 700-130 879 <br /> Ethylbenzene too 892 700-130 892 <br /> Xylenes(total) 300 267 700-130 890 <br /> Methyl tert-butyl ether 100 10 2 700-130 102 <br /> Surrogate a,a,a-Trrfluorotoluene 100 956 600-140 95 6 <br /> Matrix Spike 99-39?52-M-S1 5903200-07 <br /> Benzene 3/19199 too ND 907 ug/l 600-140 907 <br /> Toluene 100 ND 9 10 600-140 910 <br /> �ylbenzene 10 0 ND 9 OS '; 60 0-140 90 5 <br /> /encs(total) 30 0 ND 27 ! 60 0-140 90 3 <br /> Methyl tent-butyl ether 10 0 ND 12 5 60 0-14D 125 <br /> Surrogate a,a,a-Trrfluorotoluene " 10 0 9 35 60 0-140 93 S <br /> Matrix Spike Drip 9030252;MSDI S903200-07 <br /> Benzene 3/19/99 100 ND 900 ug/l 600-140 900 25 0 0 775 <br /> Toluene 100 ND 9 04 600-140 904 250 0 662 <br /> Ethylbenzene too ND 902 600-140 90 2 25 0 0 332 <br /> Xylenes(total) 300 ND 26 9 600-140 897 250 0 667 <br /> Methyl Cert-butyl ether 100 ND 112 600-140 112 250 110 <br /> Surrogate a a a-Trifluorotoluene 100 947 600-140 94 7 <br /> Batch, 2030784 Date Prepartd. 3122/99 EXtr2ction Method. EPA 5030B(PM <br /> Blank 9030284-BLKI <br /> Purgeable Hydrocarbons 3/23199 ND ug/l Soo <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tent-butyl ether PID 500 <br /> Surrogate a a,a-Trrfluorololuene 100 9 75 600-140 975 <br /> LLS 9030284-BSI <br /> Benzene 3/23/99 10 0 903 ugA 700-130 903 <br /> Toluene 100 9 19 700-130 91 9 <br /> Ethylbenzene 100 9 10 700-130 9t 0 <br /> lenes(total) 300 273 700-130 910 <br /> —Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> '2:y� /'-) /L2 LIZ�� <br /> Sandra R Hanson,dient Services Representative Page 8 of i 1 <br />