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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> l 404 N Wlget lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analtical 819 5triker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Y1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ettler-Ryan - Dublin Client Project Ib 3202 W Hammer Ln , Stockton <br /> 6747 Sierra Court, Suite J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Doug Lee QC Sample Group 812-0639 Reported Dec 16, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Cadmium Chromium Copper Nickel Lead Zinc Silver <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst J Kelly J Kelly J Kelly J Kelly J Kelly J Kelly J Kelly <br /> MS/MSD <br /> Batch# 8120568 8120568 8120558 8120568 8120568 8120568 8120568 <br /> Date Prepared 12/9/98 12/9/98 12/9/98 12/9/98 12/9/98 12/9/98 12/9/98 <br /> Date Analyzed 12/11/98 12/9/98 12/9/98 12/9/98 12/9/98 12/9/98 12/9/98 <br /> Instrument I D # MV-4 MV-4 MV 4 MV-4 MV-4 MV-4 MV 4 <br /> Conc Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 60ug/L 60ug/L 60ug/L 60ug/L <br /> Matrix Spike <br /> % Recovery 109 97 107 105 98 101 96 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 109 97 107 105 95 101 96 <br /> Relative % <br /> Difference 00 00 00 00 31 00 00 <br /> LCS Batch# LCS120998B LCS120998B LCS120998B LCS120998B LCS120998B LCS120998B LCS120998B <br /> Date Prepared 12/9/98 12/9/98 12/9/98 12/9/98 12/9/98 12/9/98 12/9/98 <br /> Date Analyzed 12/11/98 12/11/98 12/11/98 12/11/98 12/11/98 12/11/98 12/11/98 <br /> Instrument I D # MV-4 MV-4 MV-4 MV-4 MV-4 MV-4 MV-4 <br /> LCS % <br /> Recovery 100 100 100 100 95 100 96 <br /> Recovery <br /> Control Limits 80-120 80-120 80-120 80-120 80-120 80-120 80-120 <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, #9271 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> lulianinterference,the LCS recoveryis to be used to validate the batch <br /> ne Fegley <br /> Project Manager <br /> 8120639 GET <8> <br /> I <br />