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680 Chesapeake Drive Redwood City CA 94063 (650)364.9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-96100 FAX(925)988-9673 <br /> 819 Sinker Avenue Suite 8 Sauamento 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 /> Pacific Environmental Group-Sac Project Chevron, 1001621 Banta CA Sampled 2/23/99 <br /> 11315 Sunrise Gold Circle St M Project Number 920 002 2D Received 2/26/99 <br /> Rancho Cordova,CA 95742 Project Manager Chris Brown Reported 3112199 <br /> Total Purgeable Hydrocarbons(C6-02),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal a Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank(co0,li01aedl 9030038-BLKI <br /> Surrogate a a,a-Trifluorotoluene 3/1/99 100 990 ug/I 600-140 990 <br /> LF-S 9030038-BS1 <br /> Benzene 3/2/99 100 102 ug/1 700-130 102 <br /> Toluene 100 987 700-130 98 7 <br /> Ethylbenzene 100 973 700-130 973 <br /> Xylenes(total) 300 294 700-130 980 <br /> Methyl tert-butyl ether 100 113 700-130 113 <br /> Surrogate a,a,a-Trifluorotoluene 100 102 Or600-140 101 <br /> Matrix Spike 993Q038- S1 S902329-02 <br /> Benzene 3/2/99 100 ND 102 ug/1 600-140 102 <br /> Toluene 100 ND 101 " 600-140 101 <br /> benzene 100 ND 101 600-140 101 <br /> nes(total) 300 ND 304 600-140 101 <br /> Methyl tert-butyl ether 100 ND 790 600-140 790 <br /> Surrogate a a,a-Tnfluorotoluene 100 8.36 600-140 83 6 <br /> 403 0038-MSD1 5902329-02 <br /> Benzene 3/2/99 100 ND 103 ug/1 600-140 103 25 0 0 976 <br /> Toluene 100 ND 975 600-140 975 25 0 3 53 <br /> Ethylbenzene 100 ND 101 600-140 101 25 0 0 <br /> Xylenes(total) 300 ND 306 600-140 102 25 0 0 985 <br /> Methyl tert-butyl ether 100 ND 9 15 600-140 915 25 0 147 <br /> Surrogate a,a,a-Triuorotoluene 100 840 Or600-140 840 <br /> Batch, 9030032 Date Prepared, 3/3199 Extraction Method. EPA,50-3ll EM <br /> Blan 9030032-BLKI <br /> Purgeable Hydrocarbons 3/3/99 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 tert-butyl ether ND Soo <br /> Surrogate a,a,a-TrVtuorotoluene 100 103 600-140 103 <br /> US 9030039-BSI <br /> Benzene 3/3/99 100 100 ug/1 700-130 100 <br /> Toluene " 100 994 700-130 994 <br /> Ethylbenzene 100 9 96 700-130 996 <br /> es(total) 300 301 700-130 100 <br /> Sequoia Analytical-Sacramento '"Refer to end of report for text of notes and definitions <br /> r~ <br /> andra R Hanson,Client Services Representative Page 12 of 17 <br />