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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> 4 (9 16)921-9600 <br /> Analytical FAX(916)921-0100 <br /> Gettler-Ryan-Rancho Cordova Project Tosco#6981,Stockton,CA Sampled 8/18/99 <br /> 3164 Gold Camp Dr,Ste 240 Project Number 140124 Received 8/19199 <br /> Rancho Cordova,CA 95670 Project Manager Mike Machener Reported 8126199 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT/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 /> Bateh 9080153 Date Prepared 8119199 Extraction Method EPA 5030E McON <br /> Blank 9080153-BL K 1 <br /> Purgeabie Hydrocarbons 8/19199 NO mg/kg 100 <br /> Benzene NO 000500 <br /> Toluene NA 000500 <br /> Ethylbenzene NO 000500 <br /> X)lenes(total) NO 000500 <br /> _Methyl tert-butyl ether_ NO 00500 <br /> Surrogate aaa-Tris luorotoluene 0 200 0204 600-140 102 <br /> LCS 9080153-BSI <br /> Benzene 8119/99 0200 0 221 mg/kg 700-130 110 <br /> Toluene 0200 0 235 70 0430 117 <br /> Ethylbenzene 0200 0 234 700-130 117 <br /> s(total) — 0 600 0 628 700-130 105 <br /> tent-butyl ether _ 0200 0 213 _ 700-130 _106 <br /> Surrogate a a a-TriRuorotoluene 0200 0 199 600-140 995 <br /> i <br /> Matrix Spike 9080153-MSl 5908207-04 <br /> Benzene 8/19/99 0200 ND 0 197 mg/kg 600-140 985 <br /> Toluene 0200 ND 0205 600-140 102 <br /> Ethylbenzene 0200 ND 0207 600-140 103 <br /> Xylenes(total) 0 600 ND 0 559 600-140 93 2 <br /> Methvl tent-butyl ether 0200 ND 0 197 600-140 985 <br /> Surrogate a a a-Truorotoluene 0 200 0 210 600-140 105 <br /> is l <br /> Matrix Spike Dup 9080153-MSD1 S908207-04 <br /> Benzene 8/19/99 0200 ND 0 194 mg/kg 600-140 970 250 153 <br /> Toluene 0200 ND 0 197 600-140 985 25 0 349 <br /> Ethylbenzene 0200 ND 0205 600-140 102 250 0 976 <br /> Xvlenes(total) 0 600 ND 0 553 600-140 922 25 0 1 08 <br /> Methyl tert-butvl ether 0200 ND 0202 60 0440 _101 _250 2 51 <br /> Surrogate aaa-Trtfluorotoluene 0100 0 212 600-140 106 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and def nmom <br /> Page 4 of 5 <br />