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680 Chesapeake Drive Redwood City CA 94053 (650;3649600 FAX(650)364-9233 <br /> 'Sequoia 404 N Wlget lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)9889673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Read San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> SECOR International Project Chevron 9-6258,Stockton,CA Sampled 416199 to 417/99 <br /> 9912 Business Park Dave,Ste 100 Project Number 7GO07-018-01 Received 418199 <br /> Sacramento,CA 95827 Project Manager Roger Hoffmore Reported 4/22199 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX 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 % Notes* <br /> Batch, 9040161 Date Prepared. 4114/99 Extr,agnoti Method. EPA 503Q fB McOH) <br /> Blank 9040161-BLKI <br /> Purgcable Hydrocarbons 4/14/99 ND mg/kg I 00 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Surrogate a a a-Trifluorotoluene 0200 0 211 600-140 105 <br /> LCS 9040161-BSI <br /> Benzene 4114199 0200 0207 mg/kg 700-130 103 <br /> Toluene 0200 0 222 700-130 Ill <br /> Ethylbenzene 0200 0 222 700-130 Ill <br /> Xylenes(total) 0 600 0 599 700-130 998 <br /> Surrogate a a a-Trtfluorotoluene 0200 0 216 600-140 108 <br /> oa�� 2Q40161-MSI 5904149-12 <br /> Benzene 4114199 0200 ND 0 176 mg/kg 600-140 880 <br /> Toluene 0200 ND 0 190 600-140 950 <br /> Ethylbenzene 0200 ND 0 191 600-140 955 <br /> Xylenes(total) 0 600 ND 0 519 600-140 865 <br /> Surrogate a a a-Triuorotoluene 0200 0207 600-140 103 <br /> Matrix Spike Dup 9040161-MSDI 5904149-12 <br /> Benzene 4114/99 0200 ND 0 175 mg/kg 600-140 875 250 0 570 <br /> Toluene 0200 ND 0 188 600-140 940 25 0 106 <br /> Ethylbenzene 0200 ND 0 190 600-140 950 25 0 0 525 <br /> Xylenes(total) 0 600 ND 0 518 600-140 863 25 0 0 231 <br /> Surrogate a a,a-Trifluorololuene 0200 0207 600-140 103 <br /> Batch, 9040169 Date Prepaud.__4/15199 Extraction Method. FPA 5030B( eOH) <br /> Blank 9040169-BLK I <br /> Purgeable Hydrocarbons 4115199 ND mg/kg l 00 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Surrogate aaa-Try7uorotoluene 0200 0205 600-140 102 <br /> LES 9040169-BS1 <br /> Benzene 4/15199 0200 0201 mg/kg 700-130 101 <br /> Toluene 0200 0 217 700-130 108 <br /> ,,quoia Analytical--Sacramento � `Refer to end c(report for text jf notes aid Gr/e uteons <br /> r C ?"7 - <br /> andra R Hanson,Client Services Representative Page 17 of 23 <br />