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A <br /> 819 Striker Avenue Suite 8 <br /> a Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX (916)921-0100 <br /> SECOR international Project ARCO 434,Lodi,CA Sampled 718/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 7/8/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 7116199 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFTIQuahty Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limas % Lima % Notes* <br /> Hatch, 9070172 Date Prepared. 7115/99 Extraction Method. EPA 5030B(MeOH) <br /> Blank 9070177-BLKI <br /> Purgeable Hydrocarbons 7/15199 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 s a-Trifluorotoluene 0200 0 189 600-140 94 5 <br /> LCS 9070177-BSI <br /> Benzene 7115/99 0200 0208 mg/kg 700-130 104 <br /> Toluene 0200 0 224 700-130 112 <br /> Ethylbenzene 0200 0 224 700-130 112 <br /> X es(total) 0 600 0 598 700-130 997 <br /> tert-butyl ether 0200 0203 700-130 101 <br /> Surrogate a a a-Trifluorotoluene 0200 0 193 600-140 965 <br /> Matrix Spike - 9070177-MSI S907105-01 <br /> Benzene 7/15199 0200 ND 0 216 mg/kg 600-140 108 <br /> Toluene 0200 ND 0 230 600-140 115 <br /> Ethylbenzene 0200 ND 0 224 600-140 112 <br /> Xylenes(total) 0 600 ND 0 619 600-140 103 <br /> Methyl tert-butyl ether 0200 ND 0209 600-140 105 <br /> Surrogate aaa-Trifluorotoluene 0200 0 216 600-140 108 <br /> Matrix Sgtke Du1Z 9070177-MSD1 5907105-01 <br /> Benzene 7/15/99 0200 ND 0 222 mg/kg 600-140 1 l 1 25 0 2 74 <br /> Toluene 0200 ND 0 237 600-140 118 250 2 58 <br /> Ethylbenzene 0200 ND 0 229 600-140 114 250 177 <br /> Xylenes(total) 0 600 ND 0 632 600-140 105 25 0 192 <br /> Methyl tert-butyl ether 0200 ND 0 236 600-140 118 25 0 117 <br /> Surrogate aaa-Trifluorotoluene 0200 0 223 600-140 112 <br /> 4S, ,,Analytical-Sacramento *Refer to end of report for text ofnotes and definmons <br /> Page 4 of 6 <br />