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f) <br /> 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 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 /> i <br /> EMCON -Sac Project ARCO 2130,Stockton,CA Sampled 9/1/98 <br /> 1433 N Market Blvd Projecl Number 21775-229 003 Received 9/2/98 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 9124/98 <br /> Total Purgeable Hydrocarbons(C6-Cl2), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> [Analyte Number Prepared Analyzed Limits P Y Limit Result Units Notes* <br /> Mev-5(40')(e(Yntinurril 580901_3-05 Water <br /> Methyl tert-butyl ether 8090104 9110198 9/10/98 5 00 5 15 ug/I <br /> Surrogate a a a-TrIJ7uorotoluerte 600-140 102 <br /> MW-6(40'1 S8090,13-06 Water <br /> Purgeable Hydrocarbons 8090104 9/10/98 9/10/98 500 205 ug/1 1 <br /> Benzene <br /> Toluene <br /> 0 500 0 684 <br /> Ethylbenzene 0500 ND0 500 ND " <br /> Xylenes(total) 0 500 ND <br /> Methyl tert-butyl ether 5 00 ND <br /> Surrogate a a a Triuorotoluene 600-140 963 <br /> MW-7(39') S809013-07 Water <br /> Purgeable Hydrocarbons 8090104 9/10198 9/10/98 500 ND ug/I <br /> B e 0 500 ND <br /> T e 0 500 ND " <br /> Ethylbenzene 0 500 ND <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether 5 00 ND <br /> Surrogate a a a-Trtfluoratoluene " " 600-140 995 <br /> MW-10(39'1 S80901LU Water <br /> Purgeable Hydrocarbons 8090104 9/10/98 9/10198 500 295 ug/I 4 <br /> Benzene <br /> Toluene <br /> 0 500 ND <br /> 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND <br /> Methyl Cert-butyl ether 5 00 ND <br /> Surrogate a a,a-Trrfluorotoluene 600-140 <br /> 9110 <br /> iSe�Analytical-Sacramento *Refer to end of report for text of holes and definitions <br /> Ronald W Bobel,Client Services Representative <br /> Page 3 of 7 <br />