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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 %W FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue,Sulte 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Upgradient Environmental Consultants Project Conrady Sampled 7/6/98 <br /> 336 Augusta Court Project Number N/A Received 717/98 <br /> ValIcX Sp,CA 95252 Project Manager Vic Cherven Reported 7/23/98 <br /> Volatile Organic Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Dale Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch, 8910311 Date PreRared. 7/16/98 Extraction Method. EPA 5030B IPM <br /> Illank 8070311-BLKI <br /> Ethanol 7/16198 NO ug/l 3000 <br /> Tert-butyl alcohol NO 200 <br /> Methyl test-butyl ether ND 200 <br /> Di-isopropyl ether NO 200 <br /> Ethyl tert-butyl ether NO 200 <br /> Tert-amyl methyl ether NO 200 <br /> Surrogate 1,2-DCA-d4 500 565 600-140 113 <br /> C S 9910311-BSI <br /> Methyl tert-butyl ether 7/16/08 500 57 1 ugll 700-130 114 <br /> Surrogate 1 2-DCA-d4 or 500 528 " 600-140 106 <br /> —Matrix-Si2LU 8070311-MSI 5807053-00 <br /> 'Inthyl tert-butyl ether 7/16198 500 ND 584 ug/I 600-140 117 <br /> arrogate 1,2-DCA-d4 It500 407 it 600-140 814 <br /> Matrix Spike dun 8070311-MSD1 S807053AO <br /> Methyl tert-butyl ether 7/16198 500 ND 527 ug/I 600-140 105 25 0 108 <br /> Surrogate 12-DCA-d4 500 432 " 600-140 864 <br /> Batch, 8070312 Date Prepared. 7/17/98 Extraction Method. EPA 5030B IP/Tl <br /> Blank 8070312-BLKI <br /> Ethanol 7/17198 NO ug/I 3000 <br /> Tert-butyl alcohol NO 11200 <br /> Methyl tert-butyl ether NO PJ 200 <br /> Di-isopropyl ether NO 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether NO 200 <br /> Surrogate 1 2-DCA-d4 500 509 " 600-140 102 <br /> LLS $Q703Iz-BSI <br /> Methyl tert-butyl ether 7/17/98 500 675 ug/I 700-130 135 <br /> Surrogate 12-DCA-d4 " 500 600 600-140 120 <br /> MAtnx-SpiM 84.70312-MS1 5807053-00 <br /> Methyl tent-butyl ether 7116196 500 ND 584 ug/l 600-140 117 <br /> Surrogate 1,2-DCA-d4 of 500 407 if 600-140 814 <br /> Metrix Spike Dun 8070312-MSD/ 5807053-00 <br /> Methyl tert-butyl ether 7/16198 500 ND 527 ug/I 600-140 105 250 108 <br /> uoia Analytical-Sacramento *Refer to end of report for text of notes and definatons <br /> 1. da C Schneider,Laboratory Director Page 9 of I 1 <br />