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819 Strd(er Avenue Suite 8 <br /> U L q,.®�a Sacramento C 95834 <br /> (916)922 1-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2168,Stockton,CA <br /> 3330 Cameron Park Dr Pro�ectNumber NIA Reported <br /> Cameron Park CA,95682 Protect Manager Say Johnson <br /> 03/02/01 15 32 <br /> Industrial Solvents by EPA Method 8015 (modified) - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %KEC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1B22028 -EPA 3810 Heads ace <br /> Blank(1B22028-BLKI) Prepared 02/22/01 Analyzed 02/23/01 <br /> Methanol ND 100 mg/l <br /> Surrogate I pentanol 4 76 500 952 55-157 <br /> Surrogate I-pentanol(dbwax) 428 500 856 57-170 <br /> Blank(1B22028-SLK2) _ _ Prepared&Analyzed 02/24/01 <br /> Methanol ND 100 mgA _ <br /> Surrogate I pentanol 556 11500 111 55-157 <br /> Surrogate 1 pentanol(dbwax) 481 500 962 57-170 <br /> LCS(1B22028-BSI) Prepared 02/22/01 Analyzed 02/23/01 <br /> Methanol -� 855 100 mg/l 800 107 50-150 <br /> rrogate 1-pentanol T 779 Soo 156 55-157 <br /> gate 1 pentanol(dbwax) 591 500 118 57-170 <br /> LCS (1822028-BS2) Prepared&Analyzed 02/24/01 <br /> Methanol 908 1 00 mg/1 800 113 50-150 <br /> Surrogate 1 pcnianol 618 500 124 55-157 <br /> Surrogate 1 pentanol(dbwax) 475 Soo 950 57-170 <br /> Matrix Spike(IB22028-MS1) _ _ Source MKBO548-01 Prepared 02/22/01 Analyzed 02/23/01 <br /> Methanol 896 100 mg/l 800 ND 112 50-150 _ <br /> Surrogate 1-pentanol 834 500 167 55-157 S-03 <br /> Surrogate 1-pentanol(dbwax) 639 500 128 57-170 <br /> _Matrix Spike Dup(IB22028-MSDI) Source MKB0548-01 Prepared 02/22/01 Analyzed 02/23/01 <br /> Methanol 110 100 mg/l 800 ND 138 50-150 204 —50 <br /> Surrogate 1 pentanol 767 a 500 153 55-157 <br /> Surrogate 1 pentanol(dbwax) 661 500 132 57-170 <br /> ooia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 15 of 16 <br />