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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 /> 4D— 1119 Stnler Avenue Sure 8 Sicramento CA 95834 %916)921 9600 FAX(916)921 of 00 <br /> 4VAnalytical 1455 McDoweV Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792 0342 <br /> 1551 1ndu5trW Road San Carlos CA 94070 41 1 1 (650) 232 9600 FAX(650) 232-96 f 2 <br /> EMCON -Sac Project ARCO 548, Stockton, CA Sampled 3/31/99 <br /> 1433 N Market Blvd Project Number 21775-206 004 <br /> Sacramento,CA 95834 Received 4/1199 <br /> Project Manager Dave Foley Reported 4/15/99 <br /> Total Purgeable Hydrocarbons(C6-Cl2),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit R= <br /> Notes* <br /> Batch 0040095 Date Prepared 4/8/99 EAraction <br /> Bluth 9040095_ .KI hod. EPA 5030B(Pa) <br /> Purgeable Hydrocarbons 4/8/99 ND ug/1 Soo <br /> Benzene <br /> Toluene <br /> ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0500 <br /> 0 500 � <br /> Methyl tent-butyl ether ND 500 <br /> Surrogate a a,a-Triuorotoluene !0 0 9 4311600-140 943 <br /> L-CS 2040095-BSi <br /> Benzene 418/99 100 9 83 ug/1 70 0-130 98 3 <br /> Toluene 100 9 71 70 0-130 97 l <br />*ter-t-buty? <br /> nzene 10 0 791 700-130 79 1 <br /> (total) 300 29 1 " 70 0-130 97 0 <br /> ether 10 0 105 70 0-130 105 <br /> Surrogate aaa-Trtfluororofuene 10 0 9 82 600-140 98 2 <br /> Maw Sotke 9040025-MSI SU4015-07 <br /> Benzene 4/8199 100 ND 100 ug/l 600-140 100 <br /> Toluene 160 ND 9 72 600-140 972 <br /> Ethylbenzene 10 0 ND 9 79 600-140 97 9 <br /> Xylenes(total) 300 ND 29 6 600-140 987 <br /> Methyl tert-butyl ether too ND 11 1 60 0-140 111 <br /> Surrogate aaa-Trtfluorotoluene 100 914 60 0 J40 91 4 <br /> 9040095-M5DI 5904015-07 <br /> 3enzene 4/8/99 100 ND 10 1 ug/l 60 0-140 <br /> Ibluene 100 ND 979 - 1 1 <br />? 60 0140 97 I 0 25 0 0 995 25 0 0 718 <br /> thylbenzene l0 0 ND l0 0 60 0-140 100 25 0 z 12 <br /><ylenes(total) 300 ND 304 60 0-140 10I 25 0 2 30 <br /> Methyl tert-butyl ether too ND 109 600-140 09 25 0 1 82 <br /> 1 <br />,urrogale a a a-Trnfluorotoluene 100 9 79 60 0 140 91 4 <br /> UkL-9040-1 Date PEepaared. 4/8/9 Mpthod EPA 503OU(PIT) <br />'urgeable Hydrocarbons 418199 ND ug/1 Soo <br /> lenzene ND 0 500 <br /> oluene D 0 500 <br /> thylbenzene NND 0 500 <br /> ylenes(total) ND 0 500 <br /> 1ert-butyl ether ND 500 <br /> equola Analytical -Sacramento *Refer to end of reAort for text of notes and definettons <br /> LJ <br /> onald W Bobel,Client Services Represent ttive Pagc 4 of 7 <br />