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f = 1 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(9Z5)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)911-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792 1865 FAX(707) 792-0342 <br /> ATC Associates, Inc Client Project ID Stock Fire Stat #2 62574 0001 <br /> 1117 Lone Palm Avenue <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey QC Sample Group 9812F36-01-05 Reported Jan 11 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015A <br /> Analyst A PORTER <br /> ANALYT Diesel <br /> QC Batch # G 29980HBPEXA <br /> Sample No 9812D75-01 <br /> Date Prepared 12/29/98 <br /> Date Analyzed 12/30/98 <br /> Instrument 1 D # GCHP48 <br /> Sample Cone uglL 290 <br /> Cone Spiked uglL 1000 <br /> Matrix Spike ug/L 1000 <br /> . <br /> 0/6 Recovery 71 <br /> Matrix <br /> Spike Duplicate uglL 1000 <br /> % Recovery 71 <br /> Relative % Difference 00 <br /> RPD Control Limits 0-50 <br /> LCS Batch# BLK 1 22998AS <br /> Date Prepared 12/29/98 <br /> Date Analyzed 12/30/98 <br /> Instrument I D # GCHP46 <br /> Cone Spiked uglL 1000 <br /> Recovery uglL 770 <br /> LCS % Recovery 77 <br /> Percent Recovery Control Limits <br /> F- <br /> MS/MSD 50150 <br /> SCS 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 /> EQUOIA 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 anaiytical procedure if <br /> 1 the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> I interference the LCS recovery is to be used to validate the batch <br /> Kayan Krrliyal <br /> Project Manager <br />