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680�eake Drive Redwood Clty CA 94063(650)364-9600 FAX(650) 364-9233 <br /> Sequoia 404 CN*8 Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 8t9 Striker Avenue Suite 8 Sacramento ICA 95834 (916)921-9600 FAX(916)921-0100 <br /> t. Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)79Z-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell 341 East Main St <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9807H86-01 Reported Aug 20, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes BTEX as TPH <br /> Benzene <br /> QC Batch# 00080698802009A GC080698802009A GCO80698802009A GC080698802009A GCO80698802009A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst D Newcomb D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD# 8072214 8072214 8072214 8072214 8072214 <br /> Sample Cone N D N D ND ND ND <br /> Prepared Date 8/6/98 8/6/98 8/6/98 8/6/98 8/6/98 <br /> Analyzed Date 8/6/98 8/6/98 8/6/98 8/6/98 8/6/98 <br /> Instrument 1.11) # HP9 HP9 HP9 HP9 HP9 <br /> Conc Spiked 20Ng/L 20pg/L 20jig/L 60,ug/L 240,ug/L <br /> Result 19 20 22 65 280 <br /> MS % Recovery 95 100 110 108 117 <br /> Dup Result: 19 20 22 65 280 <br /> MSD % Recov .. 95 100 110 108 -117 0 <br /> RPD 00 00 00 00 00 <br />--RPD kimit. _ 0-20 0-20 0-20 - 0-20 0-50 <br /> LCS # LCS080698 LCS080698 LCS080698 LCS080698 LCS080698 <br /> Prepared Date 8/6/98 8/6/98 8/6/98 8/6/98 8/6/98 <br /> Analyzed Date 8/6/98 8/6/98 8/6/98 8/6/98 8/6/98 <br /> Instrument 1.11) # HP9 HP9 HP9 HP9 HP9 <br /> Cone Spiked 20pg/L 20jug/L 20pg/L 60Ng/L 240 ug/L <br /> LCS Result- 18 19 20 62 230 <br /> LCS % R2cov 90 95 100 - -16 96 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 60-140 <br /> Control Limits <br /> Please Nate <br /> SEQU N LYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> Elap 2 1 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 /> Peg y Pe ner <br /> Proj Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=.Relative%Difference 9807H66 BLA <3> <br />