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Sequoia 680 esapeake Drive Redwood City CA 9406 {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 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 10 <br /> ATC Associates Inc Client Project ID KOK Reality 62581 0001 <br /> 1260 Graphics Drive <br /> Modesto CA 95351-1502 <br /> Attention Tom Lutterman QC Sample Group 9808939-01 Reported Sep 1 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 160 1 <br /> Analyst RDave <br /> ANALYTE Total Dissolved Solids <br /> QC Batch # IN081798160100A <br /> Sample No 9808939-01 D <br /> Date Prepared 8/17198 <br /> Date Analyzed 8118198 <br /> Sample Cone , mg/L 1 300 <br /> Cone Spiked mglL 500 <br /> Matrix Spike mg/L 1400 <br /> 0 O/o Recovery 26 <br /> Matrix <br /> Spike Duplicate mg/L 1400 <br /> % Recovery 28 <br /> Relative % Difference 7 4 <br /> RPD Control Limits 0-20 <br /> LCS Batch# LCS081 798 <br /> Date Prepared 8/17/98 <br /> Date Analyzed 8118/98 <br /> Cone Spiked, mg/L 500 <br /> LCS Recovery mglL 480 <br /> LCS % Recovery 96 <br /> Percent Recovery Control Limits <br /> MSIMSD 75125 <br /> LCS 80120 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <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 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 /> interference the LCS recovery is to be used to validate the batch <br /> van KI <br /> Project Manager <br />