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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(92S)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> �„�► Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)79Z-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 98091-147-05 Reported Oct 8 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst GR/MM <br /> ANALYTE Gasoline <br /> QC Batch # GC100298BTEX21A <br /> Sample No GW9809D23-3 <br /> Date Prepared 10/2198 <br /> Date Analyzed 1012198 <br /> Instrument I D # GCHP21 <br /> Sample Cone uglL N D <br /> Cone Spiked, uglL 250 <br /> Matrix Spike uglL 260 <br /> % Recavery 104 <br /> Matrix <br /> Spike Duplicate, uglL 240 <br /> % Recovery 94 <br /> Relative % Difference 10 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GWLCS100298A <br /> Date Prepared 1012198 <br /> Date Analyzed 1012/98 <br /> Instrument I D # GCHP21 <br /> Cone Spiked, uglL 250 <br /> LCS Recovery uglL 250 <br /> LCS % Recovery 99 <br /> Percent Recovery Control Limits <br /> MS/MSD 60-140 <br /> LCS 70 130 <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 /> t 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 on Kim <br /> Project ger <br />