Laserfiche WebLink
Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510) 686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(9t6) 921 0100 <br /> Touchstone Development Client Project ID 8632-2, Chevron 9-8632 <br /> P O Box 2554 Matrix Solid # <br /> Santa Rosa, CA 95405 <br /> Attention Jeff Monroe QC Sample Group 9408596 -01-4 Reported Aug 15, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Total Oil& Diesel <br /> Grease <br /> Method' EPA 5520EF EPA 8015 <br /> Analyst. A.Plna A Nagra <br /> MS/MSD <br /> Batch#- 940859601 940859601 <br /> Date Prepared 8/11/94 8/11/94 <br /> Date Analyzed 8/11/94 8/11/94 <br /> Instrument I D # N/A GCHP 5 <br /> Conc Spiked 1000 mg/kg 15 mg/kg <br /> Matrix Spike <br /> % Recovery- 98 87 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery* 99 88 <br /> Relative % <br /> Difference 10 11 <br /> LCS Batch# BLK081194 <br /> Date Prepared: 8/11/94 <br /> Date Analyzed 8/11/94 <br /> Instrument I D # N/A <br /> LCS % <br /> Recovery 80 - <br /> Recovery <br /> Control Limits 70-110 38-122 <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 /> f� 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 /> Vickie Tague Clark <br /> Project Manager 9408596 TTT <1> <br />