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t4 •u n <br /> (i) 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> Sequoia 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 /> ATC Associates, Inc Client Project ID W Properties/KIR, 62514 0001 <br /> 1260 Graphics Drive <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey QC Sample Group 98091-147-01-07 Reported Oct 8, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015A <br /> Analyst A PORTER <br /> ANALYTE Diesel <br /> QC Batch # GC1001980HBPEXB <br /> Sample No 9809D53-3 <br /> Date Prepared 1011198 <br /> Date Analyzed 1014198 <br /> Instrument I D # GCHP4B <br /> Sample Cone ug/L 58 <br /> Cone Spiked, ug/L 1000 <br /> Matrix Spike ug/L 830 <br /> 'Yo Recovery 77 <br /> f Matrix <br /> Spike Duplicate ug/L 870 <br /> % Recovery 81 <br /> Relative % Difference 5 1 <br /> RPD Control Limits 0-50 <br /> LCS Batch# BLK100198BS <br /> Date Prepared 1011198 <br /> Date Analyzed 1014198 <br /> Instrument I D # GCHP4B <br /> Cone Spiked, ug/L 1000 <br /> Recovery, ug/L 720 <br /> LCS % Recovery 72 <br /> Percent Recovery Control Limits <br /> MS/MSO 50150 <br /> LCS 60 140 <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 /> Ka Cimyai <br /> o)ect Man r <br /> act <br />