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D Sequoia 885)a s Drive Morgan Hill; A 95037' 1%Wr Analytical FAX(408) 78z-6308 r Blaine Tech Services(Shell) Project Egmva Sampled 1/28/00 1680 Rogers Avenue Project Number 2575 Country Club, Stockton Received 1/31/00 San Jose,CA 95112 Project Manager Nick Sudano Reported 2/14/00 16 23 - otal Purgeable Hydrocarbons, 12), X and MTBE by DUS L /QWa--I ty Control a T S —uoia Anatf� al 14V organ Hill Date Spike Sample QC Reporting Limit Recov RPD RPD Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* LCL(continued) OB09004-BSI Surrogate a,a,a-Trifluorotoluene 2/9/00 100 903 ug/l 70-130 903 Matrix Spike OB09004-MSI MJA0234-20 Benzene 2/9/00 100 ND 8 81 ug/l 60-140 881 Toluene 100 ND 805 60-140 805 Ethylbenzene 100 ND 792 60-140 792 Xylenes(total) 300 ND 23 6 60-140 78 7 Surrogate a,a,a-Trifluorotoluene 100 848 70-130 848 Matrix Spike Dup OB09004-MSD1 MJA0234-20 Benzene 2/9/00 100 ND 865 ug/l 60-140 86 5 25 183 Toluene 100 ND 792 60-140 792 25 163 Ethylbenzene 100 ND — 778 60-140 778 25 178 Xylenes(total) 300 ND 232 60-140 773 25 1 71 Surrogate a,a a-Trifluorotoluene 100 831 70-130 831 Batch OB10004 Date Prepared 2/10/00 Extraction Method EPA 5030B IP/T1 Blank OB10004-BLKI Purgeable Hydrocarbons 2/10/00 ND u I 50 0 Benzene ND 0 500 Toluene ND 0 500 Ethylbenzcne ND 0 500 Xylenes(total) ND 0 500 Methyl tent-butyl ether ND 250 _ Surrogate a,a,a-Trifluorotoluene 100 820 70-130 820 LCS OB10004-BSI Purgeable Hydrocarbons 2/10/00 250 284 ug/l 70-130 114 Surrogate a,a,a-Trifluorotoluene 100 990 70-130 990 LC5 Duo -- _ — --- — ---_ OB10004-BSD/ — — -------- ---- — Purgeable Hydrocarbons 2/10/00 250 246 ug/l 70-130 984 25 143 Surrogate a,a,a-Trifluorotoluene 100 944 " 70-130 944 Sequoia Analytical-Morgan Hill *Refer to end of report for text of notes and defnatons Page 16 of 20