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Sequoia 680 ChesapeakeDrive ' " 510 988-9600 FAX(510 988-90/S <br /> 404 N.Wrget Lane Walnut Creek,CA 94598 ( ) <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(91b1.79 -0342 <br /> Analytical 707 792-1865 FAX(707)792-0342 <br /> 1455 McDowell Blvd.North.Ste.D Petaluma CA 94954 ( ) <br /> Blaine Tech Services Client Project ID: Shell 1267 Country Club <br /> 1680 Rogers Ave. <br /> San Jose, CA 95112 Reported: May 21, 1998 <br /> Attention: Fran Thie QC Sample Group: 980..662-01 P Y <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 8015A <br /> Analyst: A. PORTER <br /> ANALYTE Diesel ` <br /> QC Batch#: GCO515980HBPEXA <br /> Sample No.: 9805934-1 <br /> Date Prepared: 5115/98 <br /> Date Analyzed: 5115198 <br /> Instrument I.D.M. GCHP58 s <br /> Sample Conc.,ug/L: 430 <br /> Conc.Spiked, ug/L: 1000 <br /> Matrix Spike,ug/L: 1200 <br /> %Recovery:' 77 _ <br /> Matrix <br /> pike Duplicate,ug/L: 1000 <br /> %Recovery: . 57 <br /> elative%Difference: 30 <br /> RPD Control Limits: 0-50 <br /> LCS Batch#: BLK05159BAS <br /> Date Prepared: 5/15198 <br /> Date Analyzed: 5/15198 <br /> Instrument l.D.#: GCHPSA <br /> Conc.Spiked,ug/L: 1000 <br /> Recovery,ug/L: 840 , <br /> LCS%Recovery: 84 <br /> Percent Recovery Control Limits: <br /> MS/MSD 50-150 <br /> LCS 60-140 <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 /> L-r <br /> YTICAL 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 /> the recovery of analytes from the matrix spike does not fall within specified control limits dug to matrix <br /> interference,the LCS recoveryis to be used to validate the batch. ' <br /> aroject <br /> nager �q <br />