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c <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wlget 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)791-1865 FAX(707)792-0342 <br /> Gettler Ryan/Gestrategies Client Project ID 69811140124, 4707 Pacific Ave <br /> 3164 Gold Camp Drive, #240 <br /> Rancho Cordova, CA 95670 <br /> Attention Steve Carter QC Sample Group 9811 E17 Reported Dec 22, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst AM <br /> ANALYTE Gasoline <br /> QC Batch # GC112198BTEX17A <br /> Sample No GW9811B17-02 <br /> Date Prepared 11/21/98 <br /> Date Analyzed 11/21/98 <br /> Instrument I D # GCHP17 <br /> Sample Conc ug/L N D <br /> Conc Spiked ug/L 250 <br /> Matnx Spike, u9/L 250 <br /> % Recovery 100 <br /> Matrix <br /> Spike Duplicate ug/L 240 <br /> % Recovery 96 <br /> Relative % Difference 4 1 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GC112193BTEX17A <br /> Date Prepared 11/21/98 <br /> Date Analyzed 11/21/98 <br /> Instrument I D # GCHP17 <br /> Conc Spiked u91L 250 <br /> LCS Recovery ug/L 250 <br /> LCS % Recovery 100 <br /> I <br /> Percent Recovery Control Limits <br /> MS/MSD 60140 <br /> LCS 70 130 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> Please Nate <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br /> QUOIA A LYTICAL 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 /> t egory <br /> P�ect Manager <br />