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0) n Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364 9600 FAX(650) 364-9233 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 Analytical 819 Sinker Avenue Srute 8 Sacramento CA 95834 (916)921 9600 FAX(916)921 0100 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707) 792-0342, EMCON - Sac Project ARCO 2130 Stockton,CA Sampled 12/2/98 1433 N Market Blvd Project Number 21775-229 003 Received 12/3/98 Sacramento CA 95834 Project Manager Dave Foley Reported 12/17/98 Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUE'T Sequoia Analytical, - Sacramento Batch Date Date Surrogate Reporting Analyte Number Prepared Analyzed Limits Limit Result Units Notes* MW-5(75').U9 led) S81204,6-05 NVater Methyl tert-butyl ether 8120107 12/7198 12/7/98 5 00 894 ug/l Surrogate a a a Trtfluorotolueeie 600-140 86 / MW-6(722) SS120,4,6-06 Water Purgeable Hydrocarbons 8120107 12/7/98 1217198 500 124 ug/l 2 Benzene 0 500 ND Toluene 0 500 ND Ethylbenzene 0 500 ND Xylenes(total) 0 500 ND Methyl tert-butyl ether 5 00 ND Surrogate a a a-Trtfluorotoluene 600-140 99 1 % MW-7(72'1 5812046-07 )Vater Purgeable Hydrocarbons 8120106 12/7/98 1217/98 500 ND ug/l B e 0 500 ND T e 0 500 ND " Ethylbenzene 0 500 ND Xylenes(total) 0 500 ND Methyl tert-butyl ether Soo ND Surrogate a a a Triuorotoluene or 600-140 85 g % MW-I0(71') SS12046-9R Water Purgeable Hydrocarbons 8120106 12/7198 12/7/98 500 407 ug/I 3 Benzene 0 500 6 89 " Toluene 0 500 ND Ethylbenzene 0 500 ND Xylenes(total) 0 500 0 873 Methyl tert-butyl ether 500 195 Surrogate a a a-Trifluorotoluene 01 600-140 774 3egtWnalytical-Sacramento *Refer to end of report for text of notes and defiv aeons Iona Id W Bobel,Client Services Representative Page 3 of 10