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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 15) Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(107)792-0342 <br /> U adient Environmental Consultants Project Conrad Property Sampled 12/7/98 <br /> P� j Y P Y A <br /> 336 Augusta Court Project Number NIA Received 12/8/98 <br /> Valle S ,CA 95252 Project NA--- Vic Cherven Reported 12/30/98 <br /> Volatile Organic Compounds by EPA Method 8260AIQuality Control <br /> Sequoia Analytical-Sacramento <br /> Date Splice Sample QC Reporting Limit Recov RPD RPD <br /> lAnaiyte Analyzed Level Result Result Units Recov Limits % Limit % Notes" <br /> ate Prepared. 12/11/48 Extraction Method. EPA 503011 lEJTl <br /> ]dank 8120203-BLKI <br /> Ethanol 12111/98 ND ugll 3000 <br /> Tert-butyl alcohol " ND 200 <br /> Methyl ten-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-am 1 methyl ether ND 200 <br /> Surrogate 12-DCA-d4 500 540 600-140 108 <br /> L. S. 8120203-851 <br /> Methyl ten-butyl ether 12/11/98 500 546 ug/) 700-130 109 <br /> Surrogate 12-DCA-d4 to 500 556 600-140 111 <br /> Matnx spjkg 8120203-MSI SRI 2120-01 <br /> Methyl tert-butyl ether 12/t 1/98 500 ND 578 ug/I 600440 116 <br /> rrogate 12-DCA-d4 of 500 578 of 600-140 116 <br /> Matrix-501he 12UR 8120203-M5121 58121,20-01 <br /> Methyl tert-butyl ether 12/11/98 500 ND 544 ug/i 600-140 109 25 0 6 22 <br /> Surrogate 12-DCA-d4 500 54 6 it600-140 109 <br /> Batch, 8120206 Date Prepared, 12/10/98 Extraction Method. EPA 503011 T] <br /> Blank 8120205-BL K1 <br /> Ethanol 12/10/98 ND ug/i 3000 <br /> Tert-butyl alcohol ND 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-arnyt methyl ether ND 200 <br /> Surrogate 1 2-DCA-d4 50 0 612 600-140 122 <br /> LCS 8120205-BSI <br /> Methyl tert butyl ether 12/10/98 500 60 8 ug/i 700-130 122 <br /> Surrogate 12-DCA-d4 50 0 60 4 600-140 1.21 <br /> Mat13x Spike 8120205-MS1 581209405 <br /> Methyl tert-butyl ether 12/10/98 500 476 492 ug/1 600-140 320 3 <br /> Surrogate 1,2-DCA-d4 of Soo 504 600-140 101 <br /> Matrix,Spike Dun 8120205-MSD1 S812094-05 <br /> Methyl tert-butyl ether 12110/9$ 500 476 568 ug/1 600-140 184 25 0 141 3,4 <br /> uoia Anaiytical-Sacramento *Refer to end of report for tee t of notes and definitions <br /> dna Z25i62 5q) <br /> ✓Linda C Schneider,Laboratory Director Page 10 of 12 <br />