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1455 McDowell Blvd North,Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> 342 <br /> Analytical FAX(707 <br /> www sequoialaalabs com <br /> Gettler-Ryan-Dublin Project Tosco <br /> 6747 Sierra Ct,Suite J Project Number 2701 W March Lane,Stockton Ca Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 02/15/01 10 28 <br /> Total Metals by EPA 6000/7000 Series Methods -Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %RBC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1010677-EPA 3010A <br /> Matnx Spike(1010677-MSI) Source P101467-34 Prepared 01/31/01 Analyzed 02/02/01 <br /> Antimony 444 600 ug/l 500 ND 888 75-125 <br /> Arsenic 543 100 500 ND 109 75-125 <br /> Banum 507 100 500 ND 100 75-125 <br /> Beryllium 525 100 500 ND 104 75-125 <br /> Cadmium 488 100 500 ND 976 75-125 <br /> Chromium 526 100 500 ND 104 75-125 <br /> Cobalt 521 700 S00 ND 103 75-125 <br /> Copper 514 too 500 ND 102 75-125 <br /> Lead 535 750 500 ND 107 75-125 <br /> Molybdenum 455 200 500 ND 899 75-125 <br /> Nickel 520 300 500 ND 104 75-125 <br /> Urn 530 100 500 ND 106 75-125 <br /> 500 700 500 ND 100 75-125 <br /> Thalhum 521 100 500 ND 104 75-125 <br /> Vanadium 518 too 500 ND 102 75-125 <br /> Zinc 519 200 500 ND 101 75-125 <br /> Matnx Spike Dup(1010677-MSDI) Source P101467-34 Prepared 01/31/01 Analyzed 02/02/01 <br /> Antimony 476 600 ugll 500 ND 952 75-125 696 20 <br /> Arsenic 487 100 500 ND 974 75-125 109 20 <br /> Banum 454 100 500 ND 898 75-125 110 20 <br /> Beryllium 472 100 500 ND 933 75-125 106 20 <br /> Cadmium 457 100 500 ND 914 75-125 656 20 <br /> Chromium 477 100 500 ND 943 75-125 977 20 <br /> Cobalt 474 700 500 ND 94 1 75-125 945 20 <br /> Copper 463 100 500 ND 915 75-125 104 20 <br /> Lead 493 750 500 ND 986 75-125 8 17 20 <br /> Molybdenum 471 200 Soo ND 93 1 75-125 346 20 <br /> Nickel 480 300 500 ND 960 75-125 800 20 <br /> Selenium 479 100 500 ND 958 75-125 101 20 <br /> Silver 472 700 " 500 ND 944 75-125 576 20 <br /> Thallium 475 100 500 ND 950 75-125 924 20 <br /> Vanadium 466 100 500 ND 920 75-125 106 20 <br /> Zinc 474 200 500 ND 919 75-125 906 20 <br /> �uoia Analytical-Petaluma 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 in its entirety <br /> Page 12 of 19 <br />