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680 Chesapeake Drive Redwood Ci CA 94063 <br /> ` Sequoia b (650) 364 9600 FAX(650) 364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (925}988 9600 FAX(92 5)988 9673 <br /> Analytical 819 Striker Avenue Suue 8 5a(ramenco 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 548,Stockton CA <br /> 1433 N Market Blvd Sampled 9/29/98 <br /> Project Number 21775-206 003 Received 9/30/98 <br /> Sacramento CA 95834 Project Manager Dave Foley <br /> Reported 10/14/98 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Sptke Sample QC Reporting Limit Recov RPD RPD <br /> analyte Analyzed Level Result Result Units Recov Limits /o Limit + <br /> Notes <br /> 810014$RLKl <br /> urrogate a a a Trifluorotoluene 10/9/98 10 0 <br /> 9 88 ug/1 600-14-0 —988 <br />`cs 8100108-RCI <br /> Senzene 10/9/98 100 <br /> oluene 10 7 ug/[ 700-130 107 <br /> ]0 0 995 70 0-130 99 5 <br /> thylbenzene [0 0 9 8484 �� <br /> ylenes(total) 300 29 5 700-130 98 4 lethyl tent-butyl ether [0 0 104 70 0-130 98 3700-130 104 <br /> arrogate a a a Trtfluorotoluene /00 100 „ <br /> 600-140 100 <br /> Catrix Soik 8100108-MSI 5809_371-06 <br /> enzene 10/9/98 100 ND 930 u /I <br />)luenc Ug/l <br /> 0 ND 867 600-140 93 0 <br /> 600-140 867 <br /> by,oene 10 0 ND 8 93 60 0-140 89 3 <br /> yle otal) 300 ND 264 60 0-140 88 0 <br /> ethyl tert-butyl ether 10 0 ND I3 3 " <br /> rrogate a a a-Trtuorotoluene 60 0-140 133 <br /> 10 0 848 600-140 -848 <br /> Btrix Spike Dup M0108 MS1lt S809371-06 <br /> nzene 10/9/98 100 ND <br /> luene 943 ug/l 600-140 943 250 139 <br />-lylbenzene 100 ND 896 <br /> 100 ND 8 600-140 877 250 l 15 <br /> 60 0-140 $9 6 25 0 0 335 <br />]eves(total) 300 ND 26 3 600-140 877 250 0 341 <br /> thyl tert-butyl ether 100 ND 13 3 60 0-140 33 25 0 0 <br /> 1 <br />-rogate a a a-Treuorotoluene 100 837 600-140 81 7 <br /> Lc 818141:$ DatePrepared, 10/12/98 Extraction <br /> Ilk 8100128-B1,K qod. EPA 5n B(p <br /> geable Hydrocarbons 10/12/98 ND ug/l 50 0 <br /> izene <br /> uene ND 0 500 <br /> ylbenzene <br /> ND 0 500 <br /> enes(total) ND " 0 500 <br /> hy] cert-butyl ether ND 0500 <br /> Soo <br />-agate a a a Triuorotoluene 10 0 /01 600 140 101 <br /> zene 10/12/98 1010 <br /> zene 108 ug/l 700-130 108 <br /> 100 999 70 0-130 99 9 <br />�lbenzene 100 9 88 700-130 98 8 <br />'n cal) 300 295 70 0-!30 98 3 <br /> iota Analytteal -Sacramento/f 'Refer to end of repot t for text of notes and definutons <br /> t/ <br /> ild W Bobel,Client Services Representative <br /> Page 6 of 9 <br />