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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)3649233 <br /> Sequoia 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 fAX(925)988-9673 <br /> 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 /> Analytical <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Pacific Environmental Group-Sac Protect Chevron, 1001621 Banta CA sampled 2123199 <br /> 11315 Sunrise Gold Circle St M Project Number 920 002 2D Received 2/26199 <br /> Rancho Cordova,CA 95742 Project Manager Chris Brown Re orted 3/12199 <br /> Total Purgeable Hydrocarbons(C6-C12),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 % Notes* <br /> 1,CS(Sontin" 9030039-BS1 <br /> Methyl tert-butyl ether 313/99 loo 12 9 ug/l 70 0-13D 129 <br /> Surrogate a a,a-Trifluorololuene F1 10 0 103 600-140 <br /> 103 <br /> M"E Snike 9030039-D1S1 5902332-01 <br /> Benzene 3/3/99 100 ND 101 ug/1 600-140 101 <br /> too ND 101 600-140 101 <br /> Toluene <br /> Tolueenzene 100 ND 100 600-140 100 <br /> Ethylb30 0 ND 302 600-140 ]Ol <br /> Xylenes(total) <br /> Methyl tent-butyl ether 100 ND 13 1 600-140 131 <br /> Surrogate a a,a-Trifluorololuene „ 100 102 600-140 102 <br /> gg SDI S902332-01 <br /> e 3/3199 100 ND 102 ug/] 60 0-140 102 25 0 0 985 <br /> 100 ND 101 600-140 101 25 0 0 <br /> e 600-140 995 25 0 0 501 <br /> Ethyfbenzene 10 0 ND 9 95 �� <br /> 300 ND 30 1 600-140 100 25 0 0 995 <br /> Xylenes(total) <br /> Methyl tent-butyl ether 100 ND 15 3 600-140 153 25 0 15 5 7 <br /> Surrogate a,a a-Trifluorotoluene 10 0 104 600-140 104 <br /> MO. 9030040 Date Prepared, 313122 Extraction Method, EPA 5030B(PCQ <br /> B1ank 9030040-BLK1 <br /> Purgeable Hydrocarbons 313199 PID ug/I 50 0 <br /> ND 0 500 <br /> Benzene ND 0 500 <br /> Toluene + ND + 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 500 <br /> Methyl tert-butyl ether 109 600-140 109 <br /> Surrogate a,a,a-Trifluorololuene 10 0 <br /> LAS 9030040-BSl <br /> Benzene 313/99 10 0 10 2 ug/l 700-130 102 <br /> 70 0 130 105 <br /> Toluene 100 105 <br /> Ethy lbenzene 100 973 700-130 973 <br /> « <br /> Xylenes(total) 30 0 29 5 700-130 98 3 <br /> Methyl tert-butyl ether 100 11 3 700-130 113 <br /> Surrogate a,a,a-Trifluorololuene <br /> 100 109 " 600-140 109 <br /> Matrix Spike 9030040-MS1 S90234942 <br /> 3/3/99 100 ND 107 ug/l 60 0-140 107 <br /> Benzene 100 ND 11 0 600-140 110 <br /> ene loo ND los 600-140 105 <br /> (benzene <br /> " <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> c- <br /> Sandra R Hanson, <br /> Client Services Representative Page 13 of 17 <br />