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Sequoia fiS4 C esapeake"gel La Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9Z33 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 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 /> SECOR International Project TOSCO 8671,Stockton,CA Sampled 1/27199 to 1128199 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G888-010-03 Received 1/29/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 2112/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytteal-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> 9020042 X51 <br /> Methyl tert-butyl ether 213199 0200 0 192 mg/kg 700-130 960 <br /> Surrogate a a,a-Triuorotoluene 110200 0204 It <br /> 600-140 102 <br /> MatriX Spike 9020042-MS1 5902011-03 <br /> Benzene 2/3199 0200 ND 0 186 mg/kg 600-140 93 0 <br /> Toluene 0200 ND 0 193 600-140 965 <br /> Ethylbenzene 0200 ND 0 196 600-140 98 0 <br /> Xylenes(total) 0 600 ND 0 584 600-140 973 <br /> Methyl tent-butyl ether 0200 ND 0 180 600-140 900 <br /> Surrogate a a,a-Trtfluorotoluene 0200 0 198 600-140 990 <br /> Matrix Spike Dun 9Q20042-MSD1 S902011-0 <br /> Benzene 213/99 0200 ND 0 188 mg/kg 600-140 940 25 0 1 07 <br /> Toluene 0200 ND 0 186 600-140 93 0 250 3 69 <br /> thlbenzene 0200 ND 0 197 60 0-140 985 250 0 509 <br /> Me yylenes(total) 0 600 ND 0 587 60 0-140 <br /> 978 25 0 0 513 <br /> Methyl tert-butyl ether 0200 ND 0 181 600-140 905 25 0 0 554 <br /> Surrogate a a a-Trtfluorotoluene 0200 0201 600-140 101 <br /> Batch, 9Q20045 Date Prepared. '713199 Extraction Method, EPA 5030D(MeOH) <br /> 131aIIk BEKF <br /> Purgeable Hydrocarbons 2/3/99 ND mg/kg 100 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tert-butyl ether ND 00500 <br /> Surrogate a a a-Trifluorotoluene 0200 0 196 600-140 98 0 <br /> US 9020045-BSL <br /> Benzene 213/99 0200 0 212 mglkg 700-130 106 <br /> Toluene 0200 0 214 700-130 107 <br /> Ethylbenzene 0200 0 213 700-130 106 <br /> Xylenes(total) 0 600 0 640 700-130 107 <br /> Methyl Cert-butyl ether 0200 0 211 700-130 105 <br /> Surrogate a a a-Trifluorotoluene 0200 0203 600-140 101 <br /> Matrix Spike 9U20045-MSI 5902029-18 <br /> Benzene 213/99 0200 ND 0 175 mg/kg 600-140 875 <br /> Toluene 0200 ND 0 178 600-140 890 <br /> Ethylbenzene 0200 ND 0 181 600-140 905 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> d'I('—�J 4 se�:� <br /> andra R Hanson,Client Services Representative Page 8 of 11 <br /> ,P4, <br />