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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek C4 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) 792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Thiemann's Service 62505 0001 <br /> 1117 Lone Palm Ave Suite B <br /> Modesto, CA 95351 <br /> Attention Jeanne Homsey QC Sample Group 9901697-01 Reported Jan 24 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst N H <br /> ANALYTE Gasoline <br /> QC Batch # GCO12099BTEX06A <br /> Sample No 9901501-6 <br /> Date Prepared 1/20199 <br /> Date Analyzed 1/20/99 <br /> Instrument I D # GCHP06 <br /> Sample Cone ug/L 730 <br /> Cone Spiked, ug/L 250 <br /> Matrix Spike ug/L 1100 <br /> Recovery 148 <br /> Matrix <br /> Spiky Duplicate ug/L 1100 <br /> % Recovery 148 <br /> Relative % Difference 0 0 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GC012099STEX06A <br /> Date Prepared 1/20/99 <br /> Date Analyzed 1/20/99 <br /> Instrument I D # GCHP06 <br /> Cone Spiked, ug/L 250 <br /> LCS Recovery uglL 250 <br /> LCS % Recovery 100 <br /> Percent Recovery Control limits <br /> F- <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 rs a control sample of known interferent free matrix that is analyzed using the same reagents <br /> SEQUOIA ANALYTICAL preparation and analytical methods empioyed for the samples The matrix spike is an aliquot of sample <br />.� M1 fortified with known quantities of specific compounds and subjected to the entire analytical procedure kf <br /> l the recovery of analytes from the matrix spike does not fall within spectfied control limits due to matrix <br /> interference the LCS recovery s to be used to validate the batch <br /> KayitS Imyal <br /> P: ci Mana <br />