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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wlget lane Walnut Creek CA 94598 (92S)988-9600 FAX(915)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(9t6)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Gettler-Ryan-Sac Project Tosco 11193,Stockton,CA Sampled 12/29/98 <br /> 3164 Gold Camp Dr,Ste 240 Project Number 140205 03 Received 12/29/98 <br /> Rancho Cordova, CA 95670 Project Manager Todd Del Frate Reported 1!6199 <br /> Total Purgeable Hydrocarbons (C6-02),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 /> Qatrh, 9010047 Date Prepared, 115129 Extraction Method. EPA 5030B(MeOH) <br /> Blah 901QQ47-BLK1 <br /> Purgeable Hydrocarbons 1/5/99 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 aaa-Triflum oioluene 0200 0 190 600-140 950 <br /> LICS 9010047-DS 1 <br /> Benzene 1/5/99 0200 0 196 mg/kg 700-130 98 0 <br /> Toluene 0200 0 198 700-130 990 <br /> Ethylbenzene 0200 0 200 700-130 100 <br /> 0 nes(total) 0 600 0 586 700-130 97 7 <br /> yl tent-butyl ether 0200 0 179 700-130 89 5 <br /> Surrogate a a a-Trtuorotoluene 0200 0 187 600-140 935 <br /> Matrix Spike 9010047-MSI 5901008-09 <br /> Benzene 1/5199 0200 ND 0 161 mg/kg 600-140 805 <br /> Toluene 0200 ND 0 167 600-140 835 <br /> Ethylbenzene 0200 ND 0 167 600-140 83 5 <br /> Xylenes(total) 0 600 ND 0 501 600-140 835 <br /> Methyl tert-butyl ether 0200 ND 0 154 600-140 770 <br /> Surrogate a a a-Trtfluorololuene 0200 0 182 600-140 910 <br /> Matrix Spike Dup 9010047-MSD1 5901008-09 <br /> Benzene 115/99 0200 ND 0 163 mg/kg 600-140 81 5 25 0 1 23 <br /> Toluene 0200 ND 0 161 600-140 805 25 0 3 66 <br /> Ethylbenzene 0200 ND 0 168 600-140 840 25 0 0 597 <br /> Xylenes(total) 0 600 ND 0 502 600-140 83 7 25 0 0 239 <br /> Methyl tent-butyl ether 0200 ND 0 160 600-140 800 25 0 3 82 <br /> Surrogate a a a-Trifhiorololuene 0200 0 177 600-140 88 5 <br /> 0 <br /> * an definitions <br /> Sequoia Analytical-Sacramento Refer to end of report far text of d f <br /> Sandra R Hanson,Client Services Representative Page 3 of 4 <br />