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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <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 /> �,,,� Analytical <br /> 1455 McDowell Blvd North Ste 0 Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 0 <br /> Gettler-Ryan- Dublin Project Former Unocal Station #5421,Stockton,CA Sampled 8128198 <br /> 6747 Sterra Court,Ste J Project Number NIA Relogged 8131198 <br /> Dublin,CA 94568 Project Manager Todd Del Frate Report Amended 9117198 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and mrBE by DHS LUFT/Quality Control <br /> Sequoia Analytical -Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analysed Level Result Result Units Recov Limits % Limit % Notes* <br /> Hatch, 8090009 Date I rclm ed 911198 Extraction Mcithod. EPA 5030B <br /> Blank 8090009-BLI<I <br /> Purgeable Hydrocarbons 911!98 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 aaa-Tirfluorololaenc 0200 0 218 600-140 109 <br /> LCS 8,090009-BSI <br /> Ben/enc 911198 0200 0206 mg/kg 700-130 103 <br /> Toluene 0200 0 198 700-130 990 <br /> Ethylbenzene 0200 0 196 700-130 980 <br />�lcncs(total) 0 600 0 585 '1 70 0-130 97 5 — <br /> _ thy!text-butyl ether 0 200 0 19G 70 0-130 98 0 <br /> Surrogate aaa-Trffluarotolrie��e 0 200 0 221 b0 0-140 110 <br /> Matrix Spike 8090009-MSI 5808285-07 <br /> Benzene 9/1/98 0200 ND 0 198 mg/kg 600-140 990 <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 tert-butyl ether 0200 ND 0 198 600-140 990 <br /> Srarogate aaa-Tiefluoroioltrulc 0200 0 219 600-140 109 <br /> Matrix Spike Du_tz 8090009-MSDI 5808285-07 <br /> Benzene 911198 0200 ND 0 197 mg/kg 600-140 98 5 25 0 0 506 <br /> Toluene 0200 ND 0 193 600-140 965 25 0 0 <br /> Ethylbenzene 0200 ND 0 193 600-140 96 5 250 1 54 <br /> Xylenes(total) 0 600 ND 0 578 600-140 963 250 1 03 <br /> Methyl Cert-butyl ether 0200 ND 0 195 600-140 97 5 25 0 1 53 <br /> Swrogate aaa-h rfluorotoluent 0200 0 214 600-140 107 a <br /> quoia Anal kcal -Sacramento *Rcfer to(,rd ofreport fo, text of notes and definitions <br /> f <br />'Irtda C Schneider, Laboratory Director Page 4 of <br /> i �a <br />