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Sequoia <br /> 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(5E0)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Ground Zero Analysis, Inc Client Project ID I Pestana Reeve's Exxon, 95-036 <br /> 2291 West March Lane, Ste 127D Matrix Solid <br /> Stockton, CA 95207 <br /> Attention John Lane Work Order# 9707705-01-04 Reported Jul 28, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Diesel <br /> OC Batch# GC0717970HBPEXB <br /> Anally Method EPA 8015M <br /> Prep Method EPA 3550 <br /> Analyst G Fish <br /> MS/MSD # 970770501 <br /> Sample Conc N D <br /> Prepared Date 7/17/97 <br /> Analyzed Date 7/18/97 <br /> Instrument I D # GCHP5 <br /> Conc Spiked 25 mg/Kg <br /> Result. 21 <br /> MS % Recovery 84 <br /> Dup Result 22 <br /> MSD % Recov 88 <br /> RPD 47 <br /> RPD Limit 0-50 <br /> LCS # BLK071797 <br /> Prepared Date. 7/17/97 <br /> Analyzed Date. 7/18/97 <br /> Instrument I D #. GCHP5 <br /> Conc Spiked 25 mg/Kg <br /> LCS Result 21 <br /> LCS % Recov 84 <br /> 50-150 <br /> LCS 60-140 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> �$ I A ALYTICAL 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 due to matrix <br /> Interference,the LCS recovery Is to be used to validate the batch <br /> Pe gy ner <br /> PCO ct ger *x MS=Matrix Spike,MSD=MS Duplicate,RPO=Relative%Difference 9707705 GGG <2> <br />