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885 Jarvis Dnve <br /> Sequoia Morgan Dill CA 95037 <br /> 54081 776-9600 <br /> Analytical <br /> FAX(4081782-6308 <br /> uobscom <br /> www sequoialabs com <br /> Blaine Tech Services(Chev) Project Chevron 9-9840 Sampled 3/9/00 <br /> 1680 Rogers Avenue Project Number 000309-A2(4344 Waterloo Rd, Stockton) Received 3/10/00 <br /> San Jose CA 95112 Project Manager Scott Boor Reported 3/29/00 11 45 <br /> Industrial Solvents by EPA Method 8015(modified)/Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch OC15040 Date Prepared 3116100 Extraction Method EPA 3810 Heads ace <br /> Blank OC15040-BLK1 <br /> Methanol 3/16/00 ND mg/1 100 <br /> Surrogate 1 pentanol 500 549 11 55-157 110 <br /> Surrogate I-pentanol(dbwax) 500 549 57-170 110 <br /> Blank OC 15040-BLK2 <br /> Methanol 3/20/00 ND mg/l too <br /> Surrogate 1 pentanol 11 500 467 11 55-157 934 <br /> Surrogate 1-pentanol(dbwax) 500 166 11 57-170 932 <br /> LCS OC 15040-BS 1 <br /> Methanol 3/16/00 800 7 72 mg/1 70-130 965 <br /> Surrogate 1-pentanol 11 500 467 55-157 934 <br />• Surrogate I-pentanol(dbwax) 500 4 78 57-170 956 <br /> LCS OC 15040-BS2 <br /> Methanol 3/20/00 800 7 91 mg/l _ 70-I30 989 <br /> Surrogate 1 pentanol -- <br /> 500 4 90 55-157 980 <br /> Surrogate I-pentanol(dbwax) 11 500 518 57-170 104 <br /> Matrix Spike OC15040-MSI MJC0371-03 <br /> Methanol 3/16/00 800 ND 8 10 mg/l 50-150 101 <br /> Surrogate 1 pentanol 500 531 55-157 106 <br /> Surrogate I-pentanol(dbwax) 500 571 57-170 114 <br /> Matrix Spike Dup OC15040-MSDI MJC0371-03 <br /> Methanol 3/16/00 goo ND 800 mg/l_ 50-150 E00 50 124 <br /> Surrogate 1 pentanol 500 545 55-157 109 <br /> Surrogate I-pentanol(dbwax) 500 581 57-170 116 <br /> Sequoia Analvtical-Morgan Hill *Refer to end ofreport for tett of nntev and defrnrtzonv <br /> Page 6 of 8 <br />