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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233- <br /> ' 404 N WEget 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(9 t6)921-0100 <br /> 455 cDowel <br /> Blvd <br /> uma CA 94954 (77) 792-1865 FAX(707) 792-032 <br /> Analytical 1551 Induust a€]Road North Ste D San ICarios CA 94070 41 1 l (6500)232-9600 FAX(650)232-9612 <br /> E� <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 3/15199 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G600-079-04 Received 3/16/99 <br /> Sacramento,CA 95827 Project Manager RustX Benkosky Reported 4/l/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUIFT/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 /> LC'S(contiauedl 9930316-BSI <br /> Methyl tert-butyl ether 3/23/99 0200 0 218 mg/kg 700-130 109 <br /> Surrogate a a a-Trifluorotoluene 110200 0 194 600-140 970 <br /> Matrix Spike 9030316-MSl 5903219-20 <br /> Benzene 3/23199 0200 ND 0 187 mg/kg 600-140 93 5 <br /> Toluene 0200 ND 0 188 600-140 940 <br /> Ethylbenzene 0200 ND 0 190 600-140 950 <br /> Xylenes(total) 0 600 ND 0 570 600-140 95 0 <br /> Methyl tert-butyl ether 0200 ND 0 196 600-140 980 <br /> Surrogate aaa-Triuorotoluene 0200 0 193 600-140 965 <br /> Matrix Spike Dun - S903219-20 <br /> Benzene 3/23199 0200 ND 0 185 mg/kg 600-140 925 25 0 108 <br /> luene 0200 ND 0 187 600-140 93 5 25 0 0 533 <br /> ylbenzene i 0200 ND 0 188 600-140 940 25 0 1 06 <br /> ylenes(total) 0 600 ND 0 561 600-140 93 5 25 0 1 59 <br /> Methyl tert-butyl ether 0200 ND 0 189 600-140 94 5 250 364 <br /> Surrogate aaa-Trifluorotoluene 0200 0 189 600-140 945 <br /> Batch, 9030317 Dote prepared. 3125199 Extraction Method, EPA 5030B(MeOH) <br /> Blank 9030317-BI-KI <br /> Purgeable Hydrocarbons 3/23/99 ND mg/kg 1 00 <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 0200 600-140 100 <br /> I.0 S 9030317-1351 <br /> Benzene 3/23/99 0200 0 239 mg/kg 700-130 119 <br /> Toluene 0200 0 255 700-130 127 <br /> Ethylbenzene 0200 0 257 700-130 128 <br /> Xylenes(total) 0 600 0 693 700-130 115 <br /> Methyl tert-butyl ether 0200 0 225 700-130 112 <br /> Surrogate aaa-Trifluorotoluene 0200 0 215 600-140 /08 <br /> Matrix S iikke 2030317-MS1 5903219-11 <br /> Benzene 3/23/99 0200 ND 0 172 mg/kg 600-140 86 0 <br /> Toluene 0200 ND 0 184 600-140 920 <br /> Ethylbenzene 0200 ND 0 188 600-140 940 <br /> W,,—m—Analytical -Sacramento *Refer to end of report for text of notes and definitions <br /> Sandra R Hanson,Client Services Representative {, Page 17 of22 <br />