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819 Striker Avenue Suite 8 <br /> Sacramento,CA 95834 <br /> Sequoia (916)921-9600 <br /> 4 4 1 FAX(916)921-0100 <br /> - Analytical www sequolalabs corn <br /> Gettler-Ryan-Rancho Cordova Project Unocal 0187, Stockton,CA Sampl-d 519100 <br /> 3164 Gold Camp Dr, Ste 240 Project Number N/A Received 5111100 <br /> Rancho Cordova,CA 95670 Project Manager David Herzog Reported 5124100 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical -Sacramento <br /> Date Spike Sample QC Reporting Lin <br /> " Recov RPD RPD <br /> Anahte Analyzed Level Result Result Units Recon Ltmrts % Limit % ?Votes* <br /> Batch 0050196 Date Prepared 5117100 Extraction Method EPA 5030B McOH <br /> Blank 0050196-BLKI <br /> Purgeable Hydrocarbons 5117100 ND mg/kg 100 <br /> Benzene ND 000500 <br /> toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> X\len es(total) ND 000500 <br /> Methyl tert-butyl ether ND 00500 <br /> Sia j ogate aaa-Trruorotoluene 0200 0 192 600-140 960 <br /> LC S 0050196-BSI <br /> Benzene 5/17/00 0200 0 219 mg/kg 700-130 109 <br /> Toluene 0200 0 219 700-130 109 <br /> Ethylbenzene 0200 0 217 700-130 108 <br /> nes(total) 0 600 0 678 700-130 113 <br /> thyl tert-butyl ether 0200 0203 — 700-130 101 _ <br /> Sw rogate aaa-Trifluorotoluene 0200 0 194 600-140 970 <br /> Matrix Spike 0050196-MSI S005194-06 <br /> Benzene 5117100 0200 ND 0 175 mg/kg 600-140 875 <br /> Toluene 0200 ND 0 178 600-140 890 <br /> Ethylbenzene 0200 ND 0 179 600-140 895 <br /> X)lenes(total) 0 600 ND 0 558 600-140 930 <br /> Meth-,/tert-butyl ether 0200 ND 0 140 600-140 70 0 <br /> Surrogate a s a-Trifluorotoluene 0200 0 192 600-140 960 <br /> Matrix Spike Dup 0050196-MSDI S005194-06 <br /> Benzene 5/17/00 0200 ND 0 179 mg/kg 600-140 895 25 0 226 <br /> Toluene 0200 ND 0 182 600-140 91 0 250 222 <br /> Ethylbenzene 0200 ND 0 183 600-140 915 25 0 221 <br /> Xylenes(total) 0 600 ND 0 575 600-140 958 25 0 297 <br /> Methyl tert-butyl ether 0200 ND 0 185 600-140 925 25 0 277 1 <br /> Surrogate a a a-Trffluorotoluene 0 200 0 196 600-140 980 <br /> Batch 0050230 Date Prepared 5118100 Extraction Method EPA 5030B(MeOH) <br /> Blank 0050230-B LK 1 <br /> Purgeable Hydrocarbons 5/18100 ND mg/kg too <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> 46X lenes(total) ND 000500 <br /> h)l Cert-bury!ether ND 00500 <br /> Sequoia Analytical-Sacramento *Refer to end ofreport for text of notes and definitions <br /> Page 6 of 8 <br />