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6$0 Chesapeake Qrlve Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(9Z5)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)9Z1-0100 <br /> ~ Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-E865 FAX(707)792-4342 <br /> Blaine Technical Services,Inc Project Shell Oil Co Sampled 3/11/99 <br /> 1680 Rogers Ave Project Number 341 East Main St,Ripon/990311-L1 Received 3115/99 <br /> San Jose,CA 95112 Project Mana er Fran Thie Re orted 3126/99 <br /> Total Petroleum Hydrocarbons as Gasohne and BTEX by EPA 8015M18020NUQualtty Control <br /> Sequota Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits % Lirrut % Nates* <br /> Batch 9030545 Date Pre ared 3123/99 Extraction Method EPA 5030 waters <br /> Blank 9030545-BLKI <br /> Gasoline 3/23199 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 200 <br /> Surrogate a,a,a-Tris luorotoluene 300 290 650-135 967 <br /> Surrogate 4-Bromofluorobenzene 300 304 650-135 101 <br /> Blank 9030545-BLK2 <br /> Gasoline 3/24/99 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> hylbenzene ND 0 500 <br /> lenes(total) ND 0 500 <br /> ethyl tert-butyl ether ND " 200 <br /> Surrogate a,a,a-Trifluorotoluene 300 294 650-135 98 0 <br /> Surrogate 4-8romofluorobenzene 300 302 650-135 101 <br /> LCS 9030545-BS1 <br /> Gasoline 3123/99 1000 948 ugll 650-135 948 <br /> Surrogate 4-Bromofluorobenzene H300 303 650-135 101 <br /> LOS 9030545-BS2 <br /> Benzene 3/24/99 100 104 ug/I 65 0-135 104 <br /> Toluene 100 101 650-135 101 <br /> Ethylbenzene 100 95 7 650-135 957 <br /> Xylenes(total) 300 302 65 0-135 101 <br /> Surrogate a,a,a-Trifluorotoluene 300 310 650-135 103 <br /> Matnx Spike 9030545-MSI P903464-01 <br /> Gasoline 3/23/99 1000 ND 927 ug/1 65 0-135 927 <br /> Surrogate 4-Bromofluorobenzene 300 295 650-135 98 3 <br /> Matnx Spike Duy 9030545-MSD1 P903464-01 <br /> Gasoline 3123199 1000 ND 898 ug/I 65 0-135 898 200 3 18 <br /> Surrogate 4-Bromofluorobenzene " 300 295 650-135 98 3 <br /> quota Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 6 of 9 <br />