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Sequoia <br /> 680 Awake Drive Redwood City CA 94063(650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> a Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <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# 9812639-01 Reported Jan 4, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' 1,1-Dichloroethene Benzene Trichloroethene Toluene Ghloro- <br /> benzene <br /> QC Batch#- VLCSW2 VLCSW2 VLCSW2 VLCSW2 VLCSW2 <br /> Analy Method: EPA 8260 EPA 8260 EPA 8250 EPA 8260 EPA 8260 <br /> Prep Method: N A N A. N A NA. N A <br /> Analyst- AXM/LTG AXM/LTG AXM/LTG AXM/LTG AXM/LTG <br /> MS/MSD# P812197 P812197 P812197 P812197 P812197 <br /> Sample Cone N D N D N D N D N D <br /> Prepared Date 12/15/988 12/15/98 12/15/98 12/15/98 12/15/98 <br /> Analyzed Date 12/15/98 12/15/98 12/15/98 12/15/98 12/15/98 <br /> Instrument I D # - - <br /> Cone Spiked 5 0 ug/L 5 0 ug/L 5 0 ug/L 5 0 ug/L 5 0 ug/L <br /> Result 4 906 457 4 459 4 417 4 605 <br /> MS %Recovery 98 91 89 86 92 <br /> Dup Result 5147 4929 4816 4901 4914 <br /> MSD% Recov 103 98 96 96 98 <br /> RPD 48 76 77 10 65 <br /> RPD Limit 0-5 0-5 0-5 0-5 0-25 <br /> LCS# LCS121598 LCS121598 LCS121598 LOS121598 LCS121598 <br /> Prepared Date 12/15/98 12/15/98 12/15/98 12/15/98 12/15/98 <br /> Analyzed Date 12/15/98 12/15/98 12/15/98 12/15/98 12/15/98 <br /> Instrument I D # - - - - - <br /> Cone. Spiked 5 0 ug/L 5 0 ug/L 5 0 ug/L 5 0 ug/L 5 0 ug/L <br /> LCS Result 5 157 4 801 4 905 4 931 5 019 <br /> LCS% Recov. - 10314 9602 981 9862 100 38 <br /> 79-133 88-124 85-117 88.122 88-117 <br /> LCS 79-133 88-124 85-117 88-122 88-117 <br /> Control Limits <br /> Please Note <br /> _SEQUOIA ANALYTICAL __ _ The LCS is a control sample of known,Interferent-free matnx that is analyzed using the same reagents, T <br /> Elap#2245 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 nner **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager 9812639 BLA <2> <br />