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Sequoia 819 Avenue 8 <br /> Sacramento <br /> 958mento CA 95834 <br /> FAX Analytical (916) 921-9D600 <br /> (9 i 6) 921-0100 <br /> 4 <br /> SECOR International-Sacramento Project ARCO 595, Stockton,CA Sampled 9110/99 to 9114/99 <br /> 9912 Business Park Dr,Ste 100 Protect Number N/A Received 9115/99 <br /> Sacramento, CA 95827 Project Manager Rusty Benkosky Reported 9/27/99 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUF"T/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 9090227-BLKI <br /> Surrogate a,a a-Trifluorotoluene 9122199 0200 0 224 mg/kg 600-140 112 <br /> LCS 9090227-BSI <br /> Benzene 9/22/99 0200 0 215 tng/kg 700-130 108 <br /> Toluene 0200 0 212 700-130 106 <br /> Ethylbenzene 0200 0 216 700-130 108 <br /> Xylenes(total) 0 600 0 581 700-130 968 <br /> Methyl tert-butyl ether 0200 0 179 700-130 895 <br /> Surrogate a a a-Tr fluorotoluene 0200 0 235 60 0440 117 <br /> Matrix Spike 9090227-MSI 5909240-15 <br /> Benzene 9/22/99 0200 ND 0 175 mg/kg 600-140 875 <br /> Toluene 0200 ND 0 177 600-140 885 <br /> yenzene 0200 ND 0 177 600-140 885 <br /> es(total) 0 600 ND 0 500 600-140 833 <br /> Methyl tort-butyl ether 0200 ND 0 145 600-140 725 _ <br /> Surrogate a,a,a-Trifluorotoluene 0200 0 224 600-140 112 <br /> Matrix Spike Dup 9090227-MSD1 S909240-15 <br /> Benzene 9/22199 0200 ND 0 I77 mg/kg 600-140 88 5 25 0 114 <br /> Toluene 0200 ND 0 171 600-140 855 25 0 345 <br /> Ethylbenzene 0200 ND 0 179 600-140 895 25 0 112 <br /> Xylenes(total) 0 600 ND 0 500 600-140 83 3 25 0 0 <br /> Methyl tert-butyl ether 0200 ND 0 147 600-140 735 250 137 <br /> Surrogate a a a-Trifluorotoluene 0200 0 232 600-140 116 <br /> Batch 9090258 Date Prepared 9123199 Extraction Method EPA 5030E McOH <br /> Blank 9090258-BLK1 <br /> Purgeable Hydrocarbons 9/23/99 ND mg/kg 100 <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 a a,a-Trcfluorotoluene 0200 0 223 60 0-140 112 <br /> LCS 9090258-BSI <br /> Benzene 9123/99 0200 0 217 mg/kg 700-130 108 <br /> Toluene 0200 0 215 700-130 108 <br /> Ethylbenzene 0200 0 218 700-130 109 <br /> es(total) 0 600 0 588 700-130 980 <br /> Sequoia Analytical- Sacramento *Refer to end ofreport for text of notes and definitions <br /> Page 15 of 19 <br />