Laserfiche WebLink
1 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite B Sacramento CA 95834 (916)9ZI-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> r�� nvironmental Group Client Project IO ' Unocal 0123,Tracy,CA <br /> 1315unrise Gold Circle, Ste M Matrix Water <br /> Rancho Cordova, CA 95742 <br /> Attention Mike Mitchener QC Sample Group 8810088 Reported Oct 21, 1998 <br />' QUALITY CONTROL DATA REPORT <br /> 0 <br />' ANALYTE Total Organic <br /> Carbon MTBE <br /> Method: EPA 415 1 EPA 8260 <br /> Analyst: L DeCardenas Li Zhu <br /> Concentration <br /> Spiked: 2,000 mg/kg 50u9/L <br /> LCS Batch#: LCS101998A VMB1018S <br />' Date Prepared 10/19/98 10/18/98 <br /> Date Analyzed 10/19/98 10/18/98 <br /> Instrument I D # TOC-1 F2 <br /> LCS % <br /> Recovery. 95 100 <br />' Control Limits: 80-120% 70/130% <br />' MS/MSD <br /> Batch#: 981079"1 981OC9901 <br /> Date Prepared. 10/19/98 10/18/98 <br />' Date Analyzed 10/19/98 10/18/98 <br /> Instrument I D #: TOC-1 F3 <br />' Matrix Spike <br /> % Recovery: 102 100 <br />' Matrix Spike <br /> Duplicate% <br /> Recovery: 109 96 <br />' Relative% <br /> Difference: 57 4 1 <br />' Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTI L preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results <br /> Linda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 5810088 PES <7> <br /> rn <br />