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' i 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)9a8-9600 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)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID 6ozzano Property <br /> 1260 Graphics Drive <br /> Modesto, CA 95351-1502 <br /> Attention Tom Lutterman QC Sample Group 9806E06-01-02, 04-05, 17 Reported Aug 2 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Solid <br /> Method EPA 8015 <br /> Analyst G Peshina <br /> ANALYTE Gasoline <br /> QC Batch # GC062498STEXEXB <br /> Sample No GS9806EO6-4 <br /> Date Prepared 6124198 <br /> Date Analyzed 6125198 <br /> Instrument I D # GCHP22 <br /> Sample Cone , mg1Kg N D <br /> Cone Spiked, mg/Kg 5 0 <br /> Matrix Spike mg/Kg 5 5 <br /> % Recovery 110 <br /> Matrix <br /> Spike Duplicate mg/Kg 5 6 <br /> % Recovery 112 <br /> Relative % Difference 1 8 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GSBLK0624988 <br /> Date Prepared 6124198 <br /> Date Analyzed 6124/98 <br /> Instrument I D # GCHP22 <br /> Cone Spiked mg/Kg 5 0 <br /> Recovery, mg/Kg 6 0 <br /> LCS % Recovery 120 <br /> Percent Recovery Control Limits <br /> MSIMSD 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 it <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 /> K Cimyal <br /> Project Manager <br />