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p 680 Chesapeake Drive Redwood City CA 94003 (650)364 9600 FAX(650)364-9233 <br /> 1 Sequoia a 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 4 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)92 1-0 100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 79Z 1865 FAX(707)792-0342 <br /> ]551 Industrial Road San Carlos CA 94070-41 1 1 (650) Z3Z 9600 FAX(650)23Z-9612 <br /> SECOR International Project ARCO 2133, Stockton,CA Sampled 3115199 <br /> 9912 Business Park Drive, Ste 100 Project Number 7G600-079-04 Received 3/16/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 4/1/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFF/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 /> Blank(continued) 9030287-BLKI <br /> Surrogate a a a-Trrfluorotoluene 3/22199 0200 0 198 ing/kg 600-140 990 <br /> LLS 9030287-U51 <br /> Benzene 3122199 0200 0200 mg/kg 700-130 100 <br /> Toluene 0200 0200 700-130 100 <br /> Ethylbenzene 0 200 0 199 700-130 995 <br /> Xylenes(total) 0 600 0 595 700-130 992 <br /> Methyl tent-butyl ether 0200 0 224 700-130 112 <br /> Surrogate a a a-Tnfluorololuene 0200 0 198 600-140 990 <br /> Matrix Spike 2030287-MS1 S903219-04 <br /> Benzene 3/22/99 0200 ND 0 171 mg/kg 600-140 855 <br /> Toluene 0200 ND 0 178 600-140 890 <br /> )benzene ;i 0200 ND 0 179 ;i 600-140 895 <br /> nes(total) 0 600 ND 0 540 600-140 900 <br /> ethyl tent-butyl ether 0200 ND 0203 600-140 101 <br /> Surrogate a a a-Triuorotoluene 0200 0 195 600-140 975 <br /> 9030287-MSD 1 5903219-04 <br /> Benzene 3/22/99 0200 ND 0 174 mg/kg 600-140 870 25 0 174 <br /> Toluene 0200 ND 0 177 600-140 885 25 0 0 563 <br /> Ethylbenzene 0200 ND 0 181 600-140 905 25 0 l 11 <br /> Xylenes(total) 0 600 ND 0 545 600-140 908 250 0 885 <br /> Methyl tert-butyl ether 0200 ND 0208 600-140 104 25 0 293 <br /> Surrogate a a a-Trifluorotoluene 0200 0 197 600-140 985 <br /> Batch. 9030316 Date Prepared. 3123199 Extraction Method, EPA 5030E(MeOH) <br /> BlanK 9030316-BLK1 <br /> Purgeable Hydrocarbons 3123/99 ND mg/kg 100 <br /> Benzene SND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene IND 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 /> LCE 9030316-BS] <br /> Benzene 3123199 0200 0202 mg/kg 700-130 101 <br /> Toluene 0200 0204 700-130 102 <br /> Ethylbenzene 0200 0204 700-130 102 <br /> Xylenes(total) 0 600 0 608 700-130 101 <br /> IlWoia Analytical-Sacramento *Refer to end of report for text of notes and definmons <br /> Sandra R Hanson,Client Services Representative Page 16 of 22 <br />