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s` 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 3649233 <br /> 1 Sequoia 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(975)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916) 921-0100 <br /> �����T�,',��� 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> IWOJ�/ 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650) 232-9612 <br /> arae Tech Services(Chev) Project Chevron <br /> 1680 Rogers Avenue Pro)ect Number Chevron# 9-4275 Reported <br /> San Jose CA,95112 Project Manager Christine Lillie 29-Sep-99 10 59 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunt Units Level Result %REC Linuts RPD Litrut Notes <br /> Batch 9123010 Prepares! 21-SeR1-99 Using EPA 5030B [PIT] <br /> Blank(9123010-BLK1) <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent hutvl ether ND 2 5 " <br /> Surrogate a a a-T7 iuorwoluene 286 300 95.; 70-130 <br /> LCS(9123010-BSI) <br /> Benzene 195 0 50 ug/I 200 975 70-130 <br /> Toluene 19 S 0 50 200 99 0 70-130 <br /> vvlbenzene 195 0 50 200 975 70-130 <br /> les(total) 598 050 600 99 7 70-130 <br /> Surrogate aaa-Tris luorotoluene 267 300 890 70-130 <br /> LCS Dup(9123010-BSD1) <br /> Benzene 19 0 050 ug/I 200 95 0 70-130 2 60 20 <br /> Toluene 197 050 200 98 5 70-130 0 506 20 <br /> Ethylbenzene 200 050 200 100 70-130 253 20 <br /> Xylenes(total) 62 3 0 50 600 104 70-130 4 10 20 <br /> Surrogate a a a-TrIfluororoluene 279 300 93 0 70-130 <br /> Sequoia Analytical -Walnut Creek The results in du s repo rr apply rt)the swn les <br /> p analyzed i n accordance with rhe churn of <br /> custody document This analytical report must he reproduced n,its entirety <br /> s <br /> Me i4Ca Brewer, Project Manager <br /> Page 7 of 8 <br />