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■ i <br /> 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> X1117 Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Bozzano Property <br /> 1260 Graphics Drive <br /> Modesto, CA 95351-1502 <br /> Attention Tom Lutterman QC Sample Group 9806E06-13 Reported Aug 2, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Solid <br /> Method EPA 8015 <br /> Analyst R Geckler <br /> ANALYTE Gasoline <br /> QC Batch # GC062598BTEXEXB <br /> Sample No GS9806C94-2 <br /> Date Prepared 6125198 <br /> Date Analyzed 6126198 <br /> Instrument I D # GCHP22 <br /> Sample Conc , mglKg N D <br /> Conc Spiked mg/Kg so <br /> Matrix Spike, mg/Kg 63 <br /> % Recovery 126 <br /> Matrix <br /> Spike Duplicate mg/Kg 62 <br /> % Recovery 124 <br /> Relative % Difference 1 6 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GSBLK062598B <br /> Date Prepared 6125198 <br /> Date Analyzed 6/26/98 <br /> Instrument 1 D # GCHP22 <br /> Conc Spiked mg/Kg 5 0 <br /> Recovery mg/Kg 6 2 <br /> LCS % Recovery 124 <br /> Percent Recovery Control Limits <br /> IVIS/MSD 60140 <br /> LCS 70130 <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 /> 1 fortified with known quantities of specific compounds and subjected to the enure analytical procedure If <br /> the recovery of anaiytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference the LCS recover is to be used to validate the batch <br /> �Z�7 <br /> Ka van Kim <br /> Project Manager <br />