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r <br /> Sequoia 819 Straker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921 <br /> www sequoiaiahs com com <br /> IT Corporation-Sacramento Project Parkinson's ARCO, Stockton Sampled 9121/00 <br /> 1433 N Market Blvd, Ste,I Project Number 880-040 1 A/01050000 Received 9/21/00 <br /> Sacramento,CA 95834 Project Manager Kathleen Waldo Reported 10/6/00 <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 0JO1001 Date Prepared 10/1/00 Extraction Method EPA 3810 Heads ace <br /> Blank OJ01001-BLK1 <br /> Methanol 10/1/00 ND mg/I 100 <br /> Surrogate 1 pentanol -500 4 47 - 55-157 894 s <br /> Surrogate 1 pentanol(dbwax) 500 337 57-170 674 <br /> LCS OJ01001-BS1 ' <br /> Methanol 10/1/00 800 781 mg/I 70-130 976 <br /> Surrogate 1 pentanol _ 500 493 55-157 986 _ <br /> Surrogate 1 pentanol(dbwax) 500 3 74 57-170 748 x <br /> Matrix Spike OJ01001-MS1 S009302-02 <br /> Methanol I0/1100 800 ND 845 mg/I 50-150 106 <br /> Surrogate 1 pentanol 500 620 55-157 124 -v <br /> Surrogate 1 pentanol(dbwax) 56o 646 57-170 129 <br /> -- Matrix Spike Dup _ __ _ OJ01001-MSD1 _ S009302-02 ___ ___ _ <br /> Methanol _ 10/1/00 800 ND 879 mg/1 50-150 110 50 394 y- <br /> Surrogate 1 pentanol 500 617 55-157 123 <br />—Surrogate—!pentanol(dbwax) 5 00 6-47 57-170-129 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 9 of 10 <br />