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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX (650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> �rilr� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (9t6) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-2033 /971117-M2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 C66-01 Reported Dec 10, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloro- Tnchloro- Chloro- <br /> ethene ethene Benzene <br /> GC Batch# GC1123978010098 GC112397801009B GC112397801009B <br /> Analy Method EPA 8010 EPA 8010 EPA 8010 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 <br /> Analyst B Ali B Ali B All <br /> MS/MSD # 9711B1201 9711B1201 9711B1201 <br /> Sample Cone N D 190 N D <br /> Prepared Date 11/23/97 11/23/,97 11/23/97 <br /> Analyzed Date 11/23/97 11/23/97 11/23/97 <br /> Instrument I D # GCHP9 GCHP9 GCHP9 <br /> Cone Spiked 25pq/L 25kg/L 25ug/L <br /> Dilution Factor 10 10 10 <br /> Result 210 320 200 <br /> MS %Recovery 84 52 80 <br /> '10 Dup Result 190 300 190 <br /> MSD % Recov 76 44 76 <br /> RPD 100 65 51 <br /> RPD Limit 0.25 0-25 0-25 <br /> LCS # BLK112497 BLK112497 BLK112497 <br /> Prepared Date 11/24/97 11/24/97 11/24/97 <br /> Analyzed Date 11/24/97 11/24/97 11/24/97 <br /> Instrument I D # GCHP9 GCHP9 GCHP9 <br /> Cone. Spiked 25 jig/L 25ug/L 25lig/L <br /> LCS Result 22 19 21 <br /> LCS % Recov 88 76 84 <br /> 60-140 60.140 60-140 <br /> LCS 65-135 70-130 70-130 <br /> Control Limits <br /> Please Mote <br /> The LCS rs a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> ISEI NALYTICAL 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 Ifthe 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 /> MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%DifferenceManager 9711066 BLA a4> <br />