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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 1 FAX(650)364-9Z33 <br /> 404 N.Wlget Lane Walnut Creek,CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 Ih FAX(916)921-0100 <br /> I 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 " FAX(707)792-0342 <br /> } <br /> r <br /> Blaine Tech Services Client Project ID: Shell 1267 CountryClub IN <br /> 1680 Rogers Ave. <br /> San Jose, CA 95112 <br /> Attention: Fran Thie QC Sample Group: 9805662-07 Reported: May 21, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix: Liquid <br /> Method: EPA 8015 i <br /> Analyst: . CEMARTINI E <br /> ANALYTE Gasoline <br /> QC Batch#: GCO52098STEX03A <br /> �h <br /> Sample No.: GW9805C13-1 <br /> Date Prepared: 5/20/98, <br /> Date Analyzed: 5120198 y. <br /> Instrument E.D.#: GCHP03 <br /> Sample Conc, ug/L: N.D. <br /> Conc.Spiked, ug/L: 250 <br /> i <br /> Matrix Spike,ug/L: 250 <br /> %Recovery: 100.0 <br /> Matrix <br /> pike Duplicate,ug/L: 190 <br /> %Recovery: 76 <br /> elative%Difference: 27 <br /> RPD Control Limits: 0-25 <br /> LCS Batch#: GAWBLK052098A <br /> Date Prepared: 5120198 <br /> Date Analyzed: 5120198 <br /> Instrument 1.13.9: GCHP03 <br /> Conc.Spiked, ug/L: 250 <br /> LCS Recovery, ug/L: 220 <br /> LCS% Recovery: 88 <br /> Percent Recovery Control Limits: <br /> MS/MSD 60-140 <br /> LCS 70-130 <br /> Quality Assurance Statement: All standard operating procedures and quality control requirements have been met. I� <br /> Please Note:The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SE NA 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 duq to matrix <br /> interference,the LCS recovery is to be used to validate the batch. ' <br /> P ggy enner <br /> Pr ' Manager <br />