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Sequoia 680 Chesapeake Onve 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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Protect ID Shell Stockton/970905-F1 h }, <br /> 1680 Rogers Ave Matrix Liquid <br /> .San Jose, CA 95112 <br /> Attention Fran Thie Work Order # 9709144-01-02 Reported Sep 10, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloroethene Trichloroethene Benzene Toluene Chloro- <br /> benzene <br /> CSC Batch#' MS0905978266H6A MS0905978260H6A MS0905978260HSA MS0905978260H6A MS0905978260HSA <br /> Analy. Method EPA 8260 EPA 8260 EPA 8260 EPA 8260 EPA 8260 <br /> Prep Method N X N A. N A. N A. N A. <br /> Analyst. M Williams M Williams M Williams M Williams M Williams <br /> MS/MSD# 9708134502 9708134502 970864502 970BG4502 970864502 <br /> Sample Cone N D N D N D N D N D <br /> Prepared Date 9/5/97 9/5/97 9/5/97 9/5/97 9/5/97 <br /> Analyzed Date 9/5/97 9/5/97 9/5/97 9/5/97 9/5/97 <br /> Instrument I.D.#. H6 H6 H6 H6 H6 <br /> Cone Spiked 50ug/L 50ug/L 50pg/L 50ug/L 50pg/L <br /> Result 44 44 48 45 46 <br /> 46S % Recovery 88 88 96 90 92 <br /> Dup Result 44 44 48 44 46 <br /> MSD % Recov 88 88 96 88 92 <br /> RPD 00 00 00 22 00 <br /> RPD Limit 0-25 0-25 0-25 0.25 0-25 <br /> LCS #' VDB090697 VD8090697 VDBO90697 VD8090697 VDB090697 <br /> Prepared Date 9/6/97 9/6/97 9/6/97 9/6/97 9/5/97 <br /> Analyzed Date 9/6/97 9/6/87 9/6/97 9/6/97 9/5/97 <br /> Instrument I D # H6 N6 H6 H6 H6 <br /> Cone Spiked 50 ug/L 50 pg/L 50 ug/L 50 ug/L 50 pg/L <br /> LCS Result 44 44 48 46 45 <br /> LCS % Recov 88 88 96 92 90 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 65-135 70-130 70-130 70-130 70-130 <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 /> A 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 /> interference,the LCS recovery is to be used to validate the batch <br /> 7egenner **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> t Manager 9709144 BLA <4> <br />