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nnStrikerAvenue,Suite 8 <br /> 819 <br /> •X <br /> Sequoia Sacramento,CA 95834 <br /> 4N (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequoialabs.com <br /> Kleinfelder-Stockton Project: 7834 11th St, <br /> 2825 East Myrtle Street Project Number: 12573.1 Reported: <br /> Stockton CA,95205 Project Manager: Gary_Gulseth 03/22/02 13:13 <br /> EDB and DBCP by EPA Method 504.1 - Quality Control <br /> E Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2C19004-General Pre <br /> Blank(2C19004-BLKI) Prepared&Analyzed: 03/19/02 <br /> 1,2-Dibromoethane ND 0.020 ug/l <br /> 1,2-Dibromo-3-chloropropane ND 0.010 " <br /> Surrogate:l,3-Dibromopropane 2.07 2.86 72.4 28.5-118 <br /> LCS(2C19004-BS1) Prepared&Analyzed:03/19/02 <br /> 1,2-Dibromoethane 0.256 0.020 ug/l 0.250 102 70-130 <br /> 1,2-Dibromo-3-chloropropane 0.277 0.010 0.250 111 70-130 <br />` Surrogate:l,3-Dibromopropane 2.02 2.86 70.6 28.5-118 <br /> Matrix Spike(2C19004-MSI) Source:MLC0338-03 Prepared&Analyzed: 03/19/02 <br /> 1,2-Dibromoethane 0.274 0.020 ugll 0.250 ND 110 65-135 <br /> 1,2-Dibromo-3-chloropropane 0.296 0.010 " 0.250 ND 418 65-135 <br /> Surrogate:1,3-Dibromopropane 1.99 2.86 69.6 28.5-118 <br /> Matrix Spike Dup(2CI9004-MSD1) Source: MLC0338-03 Prepared&Analyzed:03/19/02 <br /> 1,2-Dibromoethane 0.278 0.020 ug/l 0.250 ND 111 65-135 1.45 20 <br /> 1,2-Dibromo-3-chloropropane 0.314 0.010 0.250 ND 126 65-135 5.90 20 <br /> Surrogate: 1,3-Dibromopropane 2.11 2.86 73.8 28.5-118 <br /> i <br /> 1 <br /> Sequoia Analytical-Sacramento 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 5 of 6 <br />