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• 819 Striker Avenue Suite 8 <br /> Ci) <br /> Sequoia Sacramento CA 95834 <br /> Analytical (916}921-9100 <br /> rCORZ <br /> FAX(9IG)92I-0100 <br /> nternational Client Project f D ARCO 434, Lodi, CA <br /> 9912 Business Park Dr , Ste 100 Matrix Soil <br /> Sacramento, CA 95827 <br /> Attention Rusty Benkosky QC Sample Group S906336 Reported Jul 7, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Lead <br /> Method EPA 6010 <br /> Analyst J Kelly <br /> Concentration <br /> Spiked 50 mg/kg <br /> LCS Batch# LCS070199 <br /> Date Prepared 07/01/99 <br /> Date Analyzed 07/05/99 <br /> Instrument I D# MV-3 <br /> LCS% <br /> Recovery 106 <br /> Oontrol Limits 80-120% <br /> MS/MSD <br /> Batch #- 9062295 <br /> Date Prepared 07101199 <br /> Date Analyzed 07/05/99 <br /> Instrument I D# MV-3 <br /> Matrix Spike <br /> % Recovery 102 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery- 102 <br /> Relative% <br /> Difference: 00 <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br /> SEQUOIA 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/MSD's are advisory only <br /> and are not used to accept or reject batch results <br /> r C �C- <br /> dra4iR Hanson <br /> sect Manager/Sacramento Laboratory <br /> S906336 SES <2> <br />