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\ Sequoia 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(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Blaine Tech Services, Inc ry Client Project ID Chevron 9-1918/970207-H1 <br /> "1680 Rogers Avenue Matra Liquid <br /> San Jose, CA 95112 <br /> 'Attention Fran ThleWork Order# 9702482 01-05 Reported Feb 20, 1997` <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#. GCO212978TEX06A GCO21297BTEX06A GCO21297BTEX06A G0021297BTEX06A <br /> Analy Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method. EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst K Porter A.Porter A.Porter A.Porter <br /> MS/MSD# 970235108 970235108 970235108 970235108 <br /> Sample Conc N D N D N D N D <br /> Prepared Date: 2/12/97 2/12/97 2/12/97 2/12/97 <br /> Analyzed Date. 2/12/97 2/12/97 2/12/97 2/12/97 <br /> Instrument I D # GCHP06 GCHP06 GCHP06 GCHP06 <br /> Conc Spiked 10Ng/L 101rg/L 10Jr9/1_ 30ug/L <br /> Result. 11 11 12 36 <br /> MS % Recovery- 110 110 120 120 <br /> Dup Result 12 13 13 39 <br /> MSD%Recov.: 120 130 130 130 <br /> RPD 87 17 80 80 <br /> RPD Limit 0.25 0-25 0-25 0.25 <br /> LCS#. BLK021297 BLK021297 BLK021297 BLK021297 <br /> I <br /> Prepared Date 2/12/97 2/12/97 2/12/97 2/12/97 <br /> Analyzed Date. 2/12/97 2/12/97 2/12/97 2/12/97 <br /> Instrument I D#: GCHP06 GCHP06 GCHP06 GCHP06 <br /> Conc Spiked 10ug/L 10,ug/L 10pg/L 30pg/L <br /> LCS Result: 12 12 13 38 <br /> LCS % Recov 120 120 130 127 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70.130 70-130 70.130 <br /> Control Limits <br /> Please Note <br /> JegPThe LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 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 if <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> imtefference,the LCS recovery is to be used to validate the batch <br /> enner <br /> anager "*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9702482 BLA <I> <br />