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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792 0342 <br /> EMCON -Sac Project ARCO 2168,Stockton, CA Sampled 8/12198 <br /> 1433 N Market Blvd Project Number 22312 00 Received 8/13/98 <br /> Sacramento,CA 95834 PloJect Manager Dave Foley Reported 8/31/98 <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 /> knalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> J.a u kk(conttnueril 8080208-B,1,.K1 <br /> trrrogate aaa-Try7uorotoluene 8/18198 100 884 trgll 600-140 88 4 <br /> SZ-s 8080208-351 <br /> lenzene 8/18/98 100 100 ug/l 700-130 100 <br /> oluene 100 9 54 700-130 95 4 <br /> thylbenzene 100 941 700-130 94 1 <br /> ylenes(total) 300 28 0 700-130 93 3 <br /> lethyl tert-butyl ether 100 9 12 700-130 91 2 <br /> uri agate aaa-Trrfluorotoluene 1190 904 600-140 904 <br /> latrlx Spike 8080208-MST 5808161-01; <br /> enzene 8118198 100 ND 9 16 ug/l 600-140 91 6 <br /> olur 1. 10 0 ND 8 81 600-140 88 1 <br /> th ene 10 0 ND 8 72 60 0-140 87 2 <br /> ylene5(total) 300 ND 26 1 600-140 870 <br /> ethyl tert-butyl ether 10 0 ND 102 600-140 102 <br /> trrogate aaa-Trifluoi otoluene 100 7 82 600-140 78 2 <br /> atrix_Spike Dun 8(580208-MSDI 5808161-05 <br />=nzene 8/18198 100 ND 927 ugll 600-140 927 25 0 1 19 <br /> fluene 100 ND 9 03 600-140 903 250 2 47 <br /> hylbenzene 10 0 ND 8 88 600-140 888 250 1 82 <br /> ilenes(total) 30 0 ND 266 600-140 88 7 25 0 I 94 <br /> ethyl tent-butyl ether 100 ND 10 2 600-140 IO2 25 0 0 <br /> rrogate a a a Trrfluorotoluene 10 0 749 600-140 74 9 <br /> Rch. 80RD209Date Prepgred. 8/19/98 <br />�6kxtractlon Method. EPA 5039B(PIT <br /> $080209-13LK I � <br /> rgeable Hydrocarbons 8/19/98 ND ug/l 500 <br /> nzene ND 0 500 <br /> luene „ <br /> ND 0 500 <br /> iylbenzene ND 0 500 <br /> lenes(total) ND 0 500 <br /> thy] tert-butyl ether ND 5 00 <br /> rogate aaa-Triuorotoluene 100 103 600-140 103 <br />-S 80802Q9-BSI <br />,izene 8119198 100 103 ugll 700-130 103 <br /> luene 100 961 700-130 96 1 <br /> ylb e 10 0 947 700-130 94 7 <br /> lenal) 300 28 3 700-130 943 <br /> luoia Analytic -Sacramento *Refer to end of report for teat of notes and definitions <br /> iald W Babe],C11ent Services Representative Page 7 of 10 <br />