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819 Striker Avenue,Sulte 8 <br /> Sequoia • <br /> Sacramento,CA 95834 <br /> 9600 <br /> /: (916)921-9600 <br /> FAX(916)921-0100 <br /> aJXTtie a www.sequolalabs.com <br /> Iwo Y <br /> Sierra-Pacific Groundwater,Inc. Project: Unocal Puregro Broadway <br /> 4911 Windplay Drive, Ste.4 Project Number: N/A Reported: <br /> El Dorado Hills CA,95762 Project Manager: John Rapp 06/15/01 16:23 <br /> EDB and DBCP by EPA Method 8011 - Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike source %REC RPD <br /> Analyte Result Limit Units Level Result "/OREC Limits RPD Limit Nous <br /> Batch 1F04033- General Pre <br /> Blank(IF04033 BLK1) Prepared:06/04/01 Analyzed:06/07/01 <br /> 1,2-Dibromoethme ND 5.00 ug/kg <br /> 1,2-Dibromo-3-chloropropme ND 5.00 " <br /> Surrogate:1,3-Dibromopropane 576 500 115 50-150 <br /> LCS(1F04033 BSI) Prepared:06/04/O1 Analyzed:06/07/01 _ <br /> 1,2-Dibromoethme 58.8 5.00 ug/kg 43.8 134 60-140 <br /> 1,2-Dibromo-3-cliloropropme 50.0 5.00 43.8 114 60-140 <br /> Surrogate:1,3-Dibromopropane 599 500 110 50-150 <br /> Matrix Spike(1F04033-MSI) Source: S105461-01 Prepared:06/04/01 Analyzed:06/07/01 <br /> 1,2-Dibromoethme 55.2 5.00 ug/kg 43.8 ND 126 50-150 <br /> 1,2-Dibromo-3-chlompropme 48.4 5.00 43.8 ND 111 50-150 <br /> Surrogate:1,3-Dibromopropane 585 500 117 50-150 <br /> Matrix Spike Dup(1F04033-MSD1) Source: 5105461-01 Prepared:06/04/01 Analyzed:06/07/01 <br /> 1,2-Dibromoethme 60.0 5.00 ug/kg 43.8 ND 137 50-150 8.33 50 <br /> 1,2-Dibromo-3-chloropropme 52.2 5.00 43.8 ND 119 50-150 7.55 50 <br /> Surrogate:1,3-Dibromopropane 585 500 117 50-150 <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 6 of 19 <br />