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Striker Avenue,Suite 8 <br /> Sequoia819 Sacramento,CA 95834 <br /> (916)921-9600 <br /> 4T) FAX(916)921-0100 <br /> pir Analytical www sequooalabs com <br /> Delta Environmental Consultants Project Arco 6080,Lathrop,CA Sampled 6/12100 <br /> 3164 Gold Camp Drive, Ste 200 Project Number N/A Received 6/13100 <br /> Rancho Cordova,CA 95670 Project Manager Jay Johnson Reported 6126/00 <br /> _ Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT%Quality Control —_ W ` <br /> Segpoia 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) 0060157-BLKI <br /> Surrogate a a a-Trifluorotoluene 6/15/00 0200 0 231 mg/kg 600-140 116 <br /> LCS 0060157-BSI <br /> Benzene 6/16/00 0200 0 192 mg/kg 700-130 960 <br /> Toluene 6/15/00 0200 0 195 1. 700-130 975 <br /> Ethylbenzene it 0200 0 189 700-130 945 <br /> Xylenes(total) 0 600 0 543 700-130 905 <br /> Methyl tert-butyl ether 0200 0206 700-130 I03 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0 229 600-140 114 <br /> Matrix Spike 0060157-MS1 S006174-02 <br /> Benzene 6/15/00 0200 ND 0 141 mg/kg 600-140 705 <br /> #,zene <br /> e 0200 ND 0 153 600-140 76 5 <br /> 0200 ND 0 155 600-140 775 <br /> (total) 0 600 ND 0 432 600-140 720 <br /> Methyl tert-butyl ether 0200 ND 0 170 600-140 850 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0 240 600-140 120 <br /> Matrix Spike Dun 0060157-MSD1 S006174-02 <br /> Benzene 6/15/00 0200 ND 0 142 mg/kg 600-140 710 250 0 707 <br /> Toluene 0200 ND 0 154 600-140 770 250 0 651 <br /> Ethylbenzene 0200 ND 0 156 600-140 790 250 0 643 <br /> Xylenes(total) 0 600 ND 0 439 600-140 732 250 165 <br /> Methyl tert-butyl ether 0200 ND 0 175 600-140 875 25 0 290 <br /> Surrogate a,a,a-Trtfluorotoluene 0200 0 232 <br /> 600-140 116 <br /> f <br /> i <br /> Sequoia Analytical-Sacramento *Refer to end of report far text of notes and definitions <br /> Page 8 of 11 <br />