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' 885 Jarvis Dave <br /> Sequoia Morgan Hill,CA 95037 <br /> (408)776 9600 <br /> Analytical <br /> FAx(408)782 6308 <br /> �& www sequoialabs com <br /> tETIC Engineering Inc-Pleasant Hill(Exxon) Project Exxon 7-3942 MOL0952 <br /> 2285 Morello Avenue Project Number Exxon 7-3942 Reported <br /> Pleasant Hill CA,94523 Project Manager Ted Moise 01/16/06 15 09 <br /> Total Metals by EPA 6000/7000 Series Methods - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Evaluation Spike Source %REC RPD <br /> Analyte Result Linut Units Level Result %REC Llriat8 RPD Limit Notes <br />' Batch 6AO4016-General Preparation <br /> Blank(6A04016-BLK1) Prepared&Analyzed 12/22/05 <br /> Hexavalent Chromium ND 0 30 uO <br />' LCS(6A04016-BSI) Prepared&Analyzed 12/22/05 <br /> Hexavalent Chromium 468 0 50 ugA 500 94 75-125 <br /> Matrix Spike(6A04016-MS1) Source MOL0952-22 Prepared&Analyzed 12/22/05 <br /> Hexavalent Chromium 650 0 50 ug/l 500 0 53 119 75-125 <br /> Matrix Spike Dup(6A04016-MSD1) Source MOL0952-22 Prepared&Analyzed 12/22/05 <br />' Hexavalent Chromium 639 0 50 ug/l 500 053 117 75-125 2 15 <br /> I <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis This <br /> analytical report must be reproduced in its entirety <br /> I <br /> Page 26 of 31 <br />