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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(92 5)988 9673 <br /> Analytical 819 Striker Avenue Suite 6 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 /> • <br />-tv1CON - Sac Project ARCO 548 Stockton,CA Sampled 9129198 <br /> 433 N Market Blvd Project Number 21775-206 003 Received 9130/98 <br /> iacramento,CA 95834 Project Manager Dave Foley Reported 10/14/98 <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 R= <br /> PD Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> CS(condoueti) 8100128-13SI <br /> lethyl tert-butyl ether 10/12/98 100 l0 I ug/I 700-130 101 <br /> urrogale aaa-Triuorotoluene „ 100 102 600-140 102 <br /> 111nx Spike 8100128-MSI 5810015-14 <br /> enzene 10/12/98 10 0 ND 10 7 ug/I 600-140 I07 <br /> 3luene 10 0 ND 997 600-140 997 <br />[hylbenzene 1010 ND 9 85 600-140 98 5 <br /> ylenes(total) 300 ND 293 600-140 97 7 <br /> ethyl tert-butyl ether 10 0 ND 120 600-140 120 <br /> irrogate aaa-Trifuorotoluene 100 9 94 600-140 994 <br /> Atrix SpikeDuo 8100128-MSnt 5810015-14 <br /> nzene 10/12/98 100 ND 108 ugll 600-140 108 250 0 930 <br /> 1luene 100 ND 10 1 600-140 101 25 0 1 30 <br /> hy�ene 100 ND 987 600-140 98 7 25 0 0203 <br /> Ile otal) 300 ND 292 600-140 973 25 0 0 410 <br /> ethyl tert-butyl ether 100 ND 109 600-140 109 250 9 61 <br /> rrogate a s a-Trifuorotoluene 100 990 6U-0-140 990 <br /> JI:h. 8100140J2ate Prepared, 10/12/99 <br /> EXtractron Method. FPA 501013{per <br /> ink $100140-BLK1 <br /> rgeable Hydrocarbons 10/12/98 ND ug/I 500 <br /> nzene „ <br /> �� ND 0 500 <br />/uene <br /> ND 0 500 <br /> iylbenzene ND 0 500 <br /> lenes(total) ND 0 500 <br /> thyl tert-butyl ether ND 5 00 <br /> rogate a a a-Trifuorololuene 100 101 600-140 101 <br /> S 8100140-13SI <br /> uene 10/12/98 10 0 106 ug/1 700-130 106 <br /> uene 100 996 700-130 996 <br /> ylbenzene 100 964 700-130 964 <br /> lenes(total) 300 288 700-130 960 <br /> thy[ tert-butyl ether 100 1 1 0 700-130 110 <br /> rogate a a a-Triuorotoluene 100 102 600-140 102 <br /> trta Spik 8100140-MSI M-O 29-01 <br /> uene 10/12/98 100 ND 103 ugll 600-140 103 <br /> uene 100 ND 978 600-140 978 <br /> ylbenzene 100 ND 964 <br /> 600-140 964 <br /> udWalytical -Sacramento *Refer to end of report for text of noies and definitions <br /> ald W Bobel,Client Services Ri6presentative Page 7 of 9 <br />