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Sequoia680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 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 SULle 8 Sacramento CA 95834 (916) 921 9000 FAX (916)921 0100 <br /> ' Pacific Environmental Group Client Project 1D Chevron 1001621, Banta, CA <br /> 11315 Sunrise Gold Circle, Ste M Matrix Water <br /> Rancho Cordova, CA 95742 <br /> ' Attention Chris Brown QC Sample Group S805321 Reported Jun 22, 1998 <br /> ' QUALITY CONTROL DATA REPORT <br /> ' ANALYTE <br /> Sulfate Nitrate <br /> ' Method EPA 300 0 EPA 300 0 <br /> Analyst Y Borinshteyn Y Borinshteyn <br /> Concentration <br /> Spiked 10 mg/L 10 mg/L <br /> ' LCS Batch# LCS6 2-98A LCS5 29-98A <br /> ' Date Prepared 06/02/98 05/29/98 <br /> Date Analyzed 06/02/98 05/29/98 <br /> Instrument I D # INIC-1 INIC-11 <br /> LCS <br /> Recovery 100 97 <br /> ' Control Limits 80120% 80120% <br /> ' MS/MSD <br /> Batch # 8060096 8052333 <br /> ' Date Prepared 06/02/98 05/29/98 <br /> Date Analyzed 06/02/98 05/29/98 <br /> Instrument I D # INIC-1 INIC-1 <br /> Matrix Spike <br /> % Recovery 100 92 <br /> ' Matrix Spike <br /> Duplicate% <br /> Recovery 100 93 <br /> ' Relative% <br /> Difference 00 10 <br /> ' Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br /> EQUOIA ANALYTICAL 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 QC limits for MS/MSDs are advisory only <br /> and are not used to accept or reject batch results <br /> IndaiC Schneider L(� <br /> Project Manager/Sacramento Laboratory <br /> ,9805321 PES s3> <br />