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BROOKSRAND£ <br /> April 12, 2002 <br /> McCampbell Analytical <br /> Attn Michelle Miller <br /> 110 2°d Ave S, #D-7 <br /> Pacheco, CA 94553 <br /> RE Brooks Rand Project MCA001, Tracking# 02BR156 <br /> LSA 040202MCA001 <br /> Dear Ms Miller, <br /> This report is for the mercury analysis of three water samples collected 04/03/02 These samples <br /> have been assigned the Brooks Rand tracking number 02BR156 <br /> All samples were r6ceived, stored, prepared and analyzed according to Brooks Rand LLC <br /> Standard Operating Procedures and EPA Method 1631 All results were blank corrected, as <br /> outlined in the calculations section of EPA Method 1631 <br /> Matrix spike recovery on sample 02BR154-01, analyzed in the same batch as the reported <br /> samples, was 129 4% and is outside of the acceptance criteria of 71-125% The spike level, <br /> however, was less than the mercury level of the native sample All QCS, OPR and other spike <br /> sample results were within acceptable recovery limits and therefore no qualification on this basis is <br /> required Sample results measured below the detection limit are qualified "U' and are reported at <br /> the detection limit All QA criteria were met, and no additional qualification of the data was <br /> required <br /> If there are any questions, please feel free to contact me <br /> Sincerely, <br /> Colin Davies <br /> Project Manager <br /> 39586th Avenue NW•Seattle,WA 98107• Phone (206) 632-6206•Fax (206) 632-6017•www brooksrand com •brl@brooksrand com <br />