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by •(g ���� <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(6 50)364-9233 <br /> 404 N Wiget Fane Walnut Creek CA 94598 (925)988-%00 FAX(925)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-f865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Farmer Prop 62596 00011 01 <br /> 1117 Lone Palm Avenue <br /> Modesto, CA 95351-1502 <br /> Attention Drew Van Allen QC Sample Group 9812090-02-04, 08-09 Reported Jan 11 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method FPA 8015 <br /> Analyst MM <br /> ANALYTE Gasoline <br /> QC Batch # GC123198BTEX30A <br /> Sample No GW9812F36-5 <br /> Date Prepared 12/31/99 <br /> Date Analyzed 12/31/99 <br /> Instrument I D # GCHP30 <br /> Sample Conc ug/L N D <br /> Conc Spiked ug/L 250 <br /> Matrix Spike ug/L 250 <br /> % Recovery 101 <br /> Matrix <br /> � Spike Duplicate uglL 260 <br /> % Recovery 103 <br /> Relative % Difference 2 0 <br /> RFD Control Limits 0-25 <br /> LCS Batch# GC1231983TEX30A <br /> Date Prepared 12/31/99 <br /> Date Analyzed 12/31/99 <br /> Instrument I D # GCHP30 <br /> Conc Spiked ug/L 250 <br /> LCS Recovery ug/L 270 <br /> LCS % Recovery 109 <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 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 /> 'f the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Kayinterference the LCS recovery is to be used to validate the batch <br /> ya Imyal <br /> P*ect Manap-- <br />