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Sequoia 680Opeake Drive Redwood City,CA 940 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-%00 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 /> ::..... <br /> Gettler-�iyan-Dublin C len ProjectD: Osco#11193, Stockton <br /> 6747 Sierra Court, Suite J Matrix: Solid <br /> Dublin, CA 94568 <br /> Attention: Doug Lee QC Sample Group: 812-1865 Reported: Dec 28, 1998::::: <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes Lead <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 <br /> Analyst: D.Newcomb D.Newcomb D.Newcomb D.Newcomb J. Kelly <br /> MS/MSD <br /> Batch#: 8121861 8121861 8121861 8121861 8121802 <br /> Date Prepared: 12/23/98 12/23/98 12/23/98 12/23/98 12/23/98 <br /> Date Analyzed: 12/23/98 12/23/98 12/23/98 12/23/98 12/28/98 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 MV-4 <br /> Conc. Spiked: 0.80 mg/kg 0.80 mg/kg 0.80 mg/kg 2.4 mg/kg 50 mg/kg <br /> Matrix Spike <br /> % Recovery: 105 91 94 104 80 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 101 88 91 100 83 <br /> Relative% <br /> Difference: 3.6 4.2 2.7 4.1 - <br /> LCS Batch#: 4LCS122398 4LCS122398 4LCS122398 4LCS122398 LCS122398 <br /> Date Prepared: 12/23/98 12/23/98 12/23/98 12/23/98 12/23/98 <br /> Date Analyzed: 12/23/98 12/23/98 12/23/98 12/23/98 12/28/98 <br /> Instrument I.D.#: HP-4 HP-4 HP-4 HP-4 MV-4 <br /> LCS % <br /> Recovery: 90 78 80 92 98 <br /> Recovery <br /> Control Limits: 50-150 50-150 50-150 50-150 80-120 <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,#1271 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 /> 1/Ytd(i(.. the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> lianne Fegley <br /> interference,the LCS recovery is to be used to validate the batch. <br /> Project Manager <br /> 8121865.GET <3> <br />