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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(65o)364-9233 <br /> 404 N Wlget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)9SB-%73 <br /> ��► <br /> Analytical <br /> 8t9 Striker Avenue Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 i <br /> 1455 NkDcweil Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 4pgraciie,t:Environmental Consultants Project Conrady Property Sampled 72/7/98 <br /> 336 Augusta Court Project Number N/A Received 12/8/98 <br /> Valle 5 ,CA 95252 Project Manager Vic Cherven Reported 12/30/98 <br /> Volatile Organic;Compounds by EPA Method 8260A/Qu2lity Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> LAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> 8120205-MSDI S812094-OS <br /> Surrogate 1,2-DC,4-d4 12/11198 500 546 u9/1 600-140 109 <br /> Batch,_9120340 Dgte Prepared. 12/28/98 Extraction Method. EPA 50301L[M <br /> Blank 8120340-BLK1 <br /> Ethanol 12/28/98 ND ug/1 3000 <br /> Tert-butyl alcohol ND 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tent-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 12-DCA-d4 500 568 600-140 114 <br /> US 8120340-BS1 <br /> Methyl tert-butyl ether 12/28/98 Soo 534 ug/l 700-130 107 <br /> Surrogate 12-DCA-d4 " 500 550 600-140 110 <br /> �atnx Spj g 8120340-MSI 5812300.03 <br /> Methyl tert-butyl ether 12/28/98 500 234 566 ug/l 600-140 109 <br /> Surrogate 1,2-DCA-d4 11500 564 600-140 113 <br /> Matnx Spike Dun 912034LENSUl S812300-03 <br /> Methyl tert-butyl ether 12/28/98 500 234 56 8 ug/l 600-140 109 25 0 0 <br /> Surrogate 12-DCA-d4 " 500 554 600-140 111 <br /> 40quoia Analytical-Sacramento *Refer to end of report for tea t of notes and definitions <br /> Linda C Schneider, Laboratory Director Page 11 of 12 <br /> i <br />