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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 9$834 (916)921 9600 FAX(916)921 0100 <br /> DO <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707) 792 0342 <br /> CMCON -Sac PrO�ect ARCO 2168,Stockton,CA Sampled SII 2198 <br /> 1433 N Market Blvd Projcct Number 22312 00 Received 8/13!98 <br />)acramento, CA 95834 Project Manager Dave Foley Reported 8131198 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Lirnit Recov RPD RPD <br /> analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes" <br />�=h 8080180 Date Prepared, 8/17198 Extract= Method, EPA 5030B (PIT) <br /> UA" 8080180-B L K <br /> urgeable Hydrocarbons 8/17/98 ND ug/l 50 0 <br /> lenzene ND 0 500 <br /> oluene ND 0 500 <br /> thylbenzene ND 0 500 <br /> ylenes(total) ND 0 500 <br /> tethyl tert-butyl ether ND 500 <br /> urrogate a a a-Triuorotoluene 100 8 98 600-140 898 <br /> a 8080180-13SI <br /> enzene 8117/98 100 102 ug/1 700-130 102 <br /> oluene 100 958 700-130 95 8 <br /> thyme 10 0 957 700-130 95 7 <br /> yl otal) 300 284 700-130 94 7 <br /> ethy tent-butyl ether t 0 0 985 700-130 98 5 <br /> errogale a a a-Trrfuorotoluene 10 0 911 600-140 92 1 <br /> alrix Spike MQ180-ms1 S808150-16 <br />_nzene 8117198 10 0 ND 105 ug/l 600-140 105 <br />)luene 100 ND 102 600-140 IO2 <br /> hylbenzene too ND 100 600-140 100 <br /> ylenes(total) . 300 ND 298 600-140 993 <br /> ethyl tert-butyl ether 10 0 ND 107 600-140 107 <br /> rrogate a a a Trei luorotoluene 100 944 600-140 944 <br /> atria Spike Dern 8080 1 S808150-16 <br /> nzene 8117198 10 0 ND 9 78 ug/1 600-140 978 25 0 7 10 <br /> luene 100 ND 9 39 600-140 93 9 25 0 8 27 <br />-lylbenzene 100 ND 932 600-140 932 250 7 04 <br /> Dienes(total) 300 ND 277 600-140 92 3 25 0 731 <br />_thyl tert-butyl ether 100 ND 11 2 600-140 112 25 0 4 57 <br /> rrogate a a a Trrfuorotoluene /00 9 01 60 0-140 90 I <br /> tch. 8080208 pate Prepared—8/18/98 <br /> Extraction MUhDd. EPA, 03013(PIT) <br /> U k $480208-BLK1 <br /> rgeable Hydrocarbons $118198 ND ug/l 500 <br /> nzene ND <br /> 0 500 <br /> luene <br /> ND 0 500 <br /> iylbenzene <br /> ND 0 500 <br />(ental) <br /> th butyl ether ND 0 500 <br /> ND Soo <br />)uoia Analytical-Sacramento *Refer to end of report foe teal of notes and defr,uaoIIs <br /> t� <br /> v , <br /> iald W Bobel,Client Services Representative Page 6 of 10 <br />