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�+ 8851ar'I Dr <br /> Sequoia Mtrgan Hill,CA 95037 <br /> ,1) (408)776-9600 <br /> W Analytical FAX(408)7826308 <br /> www sequoialabs can <br /> Secor-Rancho Cordova Project ARCO#595,Stockton,CA MMA0549 <br /> 3017 Kilgore Rd Suite 100 Pr4lect Number ARCO#595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/25/03 10 42 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEXM by EPA 8021B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3A.31004-EPA 5030B [PIT] - <br /> Laboratory Control Sample(3A31004-BSI) Prepared&Analyzed 01/31/03 <br /> Surrogate a a a-Trifluorotoluene 975 49/1 100 975 55-142 <br /> Laboratory Control Sample(3A31004-BS2) Prepared&Analyzed 01/31/03 <br /> Gasoline Range Organics(C6-C10) 299 50 ug/l 250 120 62-134 <br /> Surrogate a,a a-Trifluorotaluene 126 100 126 55-142 <br /> Matrix Spike(3A31004-MSI) Source MMA0577-02 Prepared 01/31/03 Analyzed 02/01/03 <br /> Gasoline Range Organics(C6-C10) 523 50 ug/l 550 ND 951 62-134 0-I1 <br /> Benzene 726 050 680 ND 107 68-140 <br /> Toluene 408 050 41 0 ND 984 76-127 <br /> Ethylbenzene 880 050 9 80 ND 89 8 77-130 <br /> Xylenes(total) 43 8 050 479 071 90 0 78-128 <br /> Surrogate aaa-Tr fluorotoluene 5 89 100 58 9 55-142 <br /> Matrix Spike Dup(3A31004-MSD1) -_- ----Source MMA0577-02 --Prepared 01/31103-Analyzed 02/01/03 <br /> Gasoline Range Organics(C6-C10) 507 50 ug/1 550 ND 92 2 62-134 3 11 41 0-11 <br /> Benzene _ -6 95- -_ 0 50 6 80 - ND - _102 68-140 436 30 <br /> Toluene 392 050 41 0 ND 94 5 76-127 400 30 <br /> Ethylbenzene 846 050 9 BO ND 86 3 77-130 3 94 21 <br /> Xylenes(total) 419 050 47 9 071 86 0 78-128 443 21 <br /> c - a.-- n 7r Ii., r 1.u..0 17 s 100 175 55-142 OM-07 <br /> ...» gib».- ».... - J .. .-.. - - - <br /> Batch 3BO6001 -EPA 5030B PIT <br /> Blank(3B06001-BLKI) Prepared&Analyzed 02/06/03 <br /> Gasoline Range Organics(C6-C10) ND 50 ugll <br /> -- <br /> - -Benzene- - - -- - - - - ND o50--- "- — -- - - - - - -- - - — -- -- -------- - - <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Methyl tert-butyl ether ND 2 5 " <br /> Sequoia Analytical-Morgan Hill The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced In its entirety <br /> 16 of 22 <br />