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� Sequoia <br />Analytical <br />819 Striker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916) 921 9600 <br />FAX (916) 9Z 1 O 100 <br />www sequoialabs com <br />SECOR International - Rancho Cordovd Project Arco 4932 Stockton CA <br />3017 Kilgore, Road Suite. 100 Pr0]eLt Number N/A Reported <br />Rancho Cordova CA 95670 Project Manager Rusty Benkosky 03/21/01 17 27 <br />Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Sacramento <br />Reporting Spike Source °%REC RPD <br />nahte Result t imn Units I evel Result %RLC Limits RPD I imit Notes <br />Batch 1030199- EPA 5030B [PIT[ <br />Blank (1030199-BI.K1) <br />Prepared & Analyzcd 03/16/01 <br />Surrogate 1 2 DCA -d4 <br />4-)4 <br />ug/! <br />500 908 60-140 <br />LCS (1030199 -BSI) <br />Prepared & Analyzed 03/16/01 <br />lvleth}l tert butyl ether <br />52 8 <br />200 ug/1 <br />500 106 60-140 <br />Surrogate 1 2 DC4-d4 <br />449 — <br />— - -'-- <br />- 500 �- �^ 898 60-140 <br />LCS Dup (1030199-BSDI) _ _ <br />— <br />__ �— <br />_ <br />_ Prepared & Analyzed_ 03/1_6_/01 <br />Methyl ten -butyl ether <br />529 <br />200 up/l- <br />500 106 60-140 0 189 <br />Surrogate 12 DCA d4 <br />468 <br />Soo 936 60-140 <br />Matrix Spike (1030199 -MSI) _ _ _ <br />Source <br />S103120-01 <br />Prepared & Analyzed 03/16/01 <br />Methyl tert-butyl ether- <br />601 <br />200 ug/l <br />500 918 102 60-140 <br />1 2 -DCA -d4 <br />43 9 <br />500 878 60-140 <br />—$rogate <br />trix Spike_D_up (1_03_019_9_-MSDI_)___ __ <br />-- <br />____ Source <br />5103120-01 <br />Prepared & Analyzed 03/16/01 <br />Methyl tent -butyl ether <br />647 <br />200 ug/l <br />500 9 18 1 1 l 60-140 737 <br />Surrogate 12 DCA -d4 <br />456 <br />500 912 60-140 <br />Sequoia Analytical - Sacramento <br />0 <br />25 <br />25 - <br />The results in this report apply to rite samples analy_ed in accordance it uh the chain of <br />custody docunient 71us analytical report mast be reproduced in its enlireti <br />Page I I of 12 <br />�c� <br />