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" , Sequoia ]455McDowell <br /> PeBNorth tahwx24 CA 9Ste <br /> 99544 <br /> 1 Analytical (7071792-1362 <br /> FAx[ten 792-0342 <br /> www sequoialabs com <br /> Kiff Analytical Project General <br /> Dlive Dnve,Suite D Project Number- Equiva 2575 Country Club Blvd,Stockton Reported: <br /> s CA,956I6 Project Manager- Joel Kiff 11/13/01 14 09 <br /> Total Metals by EPA 200 Series Methods-Quality Control <br /> Sequoia Analytical--Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lnrnt Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1100676-EPA 3020A <br /> Blank 1100676-BLKI Prepared 10/31/01 Anal ed 11/02/01 <br /> Cadrruum ND 050 ugA <br /> Chromium ND 50 " <br /> Copper ND so " <br /> Lead ND 50 " <br /> Nickel ND 50 " <br /> LCS Q100676-BSl Prepare& 10/31/01 Analyzed 11/02/01 <br /> Cadmnun 181 050 ug/l 200 905 85-115 <br /> Chromite 967 50 100 967 85-115 <br /> Copper 904 50 too 904 85-115 <br /> Lead 41 7 50 400 104 85-115 <br /> Nickel 210 50 200 105 85-115 <br /> Ift.Spike 1100676-MSM) Source.P110463-01 Prepared. 10/31/01 Analyzed 11/02/01 <br /> clwmwn 169 050 ug/I 200 ND 945 75-125 <br /> Chromium 841 so 100 ND 841 75-125 <br /> Copper 802 50 100 ND 802 75-125 <br /> Lead 448 50 400 52 990 75-125 <br /> Nickel 472 20 200 23 121 75-125 <br /> Matrix Spike Du 1100676-MSD! Source:P110463-01 Pr ared 10/31/01 Analyzed 11/02/01 <br /> Cadmium 175 050 ug/1 200 ND 875 75-125 349 20 <br /> Chromium 762 50 100 ND 762 75-125 986 20 <br /> Copper 893 50 too ND 893 75-125 107 20 <br /> Lead 440 50 400 52 970 75-125 1 80 20 <br /> Nickel 480 20 200 23 125 75-125 168 20 <br /> "equoia Analytical-Petalutna The results in this report apply to the samples analyzed in accordance wrth the chain <br /> • of custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 5 <br />