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r 1455 McDowell Blvd !North,Ste D <br /> . Sequoia Petaluma,CA 94954 <br /> 792-1865 <br /> FAX(707}792-0342 <br /> Analytical www sequoialabs com <br /> Cettler-Ryan- Dublin Project Tosca <br /> 6747 Sierra Ct,Suite 1 Project Number 2701 W March Lane,Stockton Ca Reported <br /> Dublin CA,94568 Project Manager Deanna[-larding 02/15/01 10 28 <br /> Total Metals by EPA 6000/7000 Series Methods- Quality Control <br /> Sequoia Analytical- Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD llmlt Notes <br /> Batch 1010677-EPA 3010A <br /> Blank(1010677-BLK1) Prepared 01/31/01 Analyzed 02/02/01 <br /> Antimony ND 600 ug/l <br /> Arsenic ND 100 " <br /> Barium ND 100 " <br /> Beryllium ND 100 " <br /> Cadmium ND 100 " <br /> Chromium ND 100 " <br /> Cobalt ND 700 <br /> Copper ND 100 " <br /> Lead ND 750 <br /> Molybdenum ND 200 " <br /> Nickel ND 300 <br /> Oum ND 100 ; <br /> ND 700 <br /> Thallium ND 100 " <br /> Vanadium ND 100 " <br /> Zinc ND 200 " <br /> LCS(1010677-BSI) Prepared 01/31/01 Analyzed 02/02/01 <br /> Antimony 468 600 u0 500 936 80-120 <br /> Arsenic 560 100 500 112 80-120 <br /> Barium 527 100 500 105 80-120 <br /> Beryllium 545 100 500 109 80-120 <br /> Cadmium 550 100 500 110 80-120 <br /> Chromium 546 100 500 109 80-120 <br /> Cobalt 542 700 500 108 80-120 <br /> Copper 537 100 500 107 80-120 <br /> Lead 556 750 500 Ill 80-120 <br /> Molybdenum 469 200 500 93 8 80-120 <br /> Nickel 544 300 500 109 80-120 <br /> Selenium 565 100 500 113 80-120 <br /> Silver 51 7 700 500 103 80-120 <br /> Thallium 543 100 500 109 80-120 <br /> Vanadium 537 100 500 107 80-120 <br /> Zinc 525 200 500 105 80-120 <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 11 of 19 <br />