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OCT 28 '02 07:39PM SEQUOIA/SAC P.7i9 <br /> Sequoia 819 Striker <br /> crameAvenue,Suite 8 <br /> / Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical wFAX(916)921-0100 <br /> ww.sequolalabs.com <br /> Kleinfcldcr-Stockton Project: Anderson St.Subd. S210239 <br /> 2825 East Myrtic Street Project Numbcr. N/A [reported: <br /> Stockton CA,95205 Project Manager; Ron Lutzinheiser 10/28/02 18:30 <br /> EDB and DBCP by EPA Method 504.1 - Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> lnalyte Result Limit Units L.e�el Result %ItLC Limits RPD limit Notes <br /> Batch 2117024-General Pre <br /> Blank(2J17024-BLK1) _ Prepared: 10/17/02 Analyzed, 10/20/02 <br /> l,2-D1bramocthane ND 0.020 ug/1 <br /> 1,2-Dibromo-3-chloropropanc ND 0.010 " <br /> Sunogare:l,3-Dibrornopropane J-- — 2.29 2.66 80.1 37-102 <br /> Laboratory Control Sample(2117024-BS1) Prepared: 10/17/02 Analyzed. 10/20/02 <br /> 1,2-Dibromoethane 0.264 0.020 ug/1 0.250- 106 70-130 <br /> 1,2-Dibromo-3-chloropropanc 0.289 0.010 0.250 116 70-130 <br /> Surrogate:1.3-Dibromoprapane- — 2.S9 2.86 90.6 37-102 <br /> Laboratory PControl Sample Du 2.117024-BSDl) Prepared: 10/17/02 Analyzed: 10/20/02 <br /> ...-- <br /> 1,2-Dibromoethanc 0.250 0.020 u8n 0.250 100 70-130 5.45 20 <br /> 1,2-Dibronio-3-chloropropane 0.265 0.010 0.250 106 70-130 8.66 20 <br /> Surrogate:l,3-Oibromopropane 2.57 ----Y 2.86 89.9 37-102 <br /> Sequoia Analytical-Sacramento 771e results in Mis report apply ro the snmples analyzed in accordance with the chain of <br /> custody docurnent. This analytical report must be reproduced In its endrery• <br /> Page 6 of 7 <br />