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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650}364-9600 FAX(650) 364-923 <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)911-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Westrec Prop /Kir 62514 0001 <br /> 1 117 Lone Palm Avenue <br /> Modesto, CA 95351-1502 <br /> Attention Jeanne Homsey QC Sample Group 9812C87-01-06 Reported Dec 31 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015A <br /> Analyst A PORTER <br /> ANALYTE Diesel <br /> QC Batch # GC1222980HBPEXZ <br /> Sample No 98121321-03 <br /> Date Prepared 12/22/98 <br /> Date Analyzed 12/28198 <br /> Instrument I D # GCHP5A <br /> Sample Conc ug1L 130 <br /> Conc Spiked ug/L 1000 <br /> Matrix Spike ug/L 970 <br /> % Recovery 84 <br /> Matrix <br /> Spoke Duplicate, uglL 570 <br /> % Recovery 44 <br /> Relative % Difference 62 <br /> RPD Control Limits 0-50 <br /> LCS Batch# BLK122298ZS <br /> Date Prepared 12/22/98 <br /> Date Analyzed 12/28/98 <br /> Instrument I D # GCHP5A <br /> Conc Spiked ug/L 1000 <br /> Recovery ug1L 1000 <br /> LCS % Recovery 100 <br /> Percent Recovery Control Limits <br /> F- <br /> MS/MSD 50150 <br /> LCS 613 140 <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 alsquot 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 he used to validate the batch <br /> Kayv imya <br /> Pr�ct Manager <br />