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` Sequoia 680 Chesapeake Dave Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 6) 404 N Wigct 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 /> -�vr <br /> Blaine Tech Services, Inc Client Project ID rri Shell Stockton /970905-Fl <br /> 1680 Rogers Ave Matrix Liquid <br /> } San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9709144-03 Reported Sep 10, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloroethene Trichloroethene Benzene Toluene Chloro- <br /> benzene <br /> OC Batch#. MS0907978260H6A MS09079782601-16A MS09079782601-16A MS0907978260H6A MS0907978260H6A <br /> Analy Method: EPA 8260 EPA 8260 EPA 8260 EPA 8260 EPA 8260 <br /> Prep Method. N A N A N A N A N A <br /> Analyst L Zhu L Zhu L Zhu L Zhu L.Zhu <br /> MS/MS1D# 9708G4301 970864301 9708G4301 970864301 970864301 <br /> Sample Cone. N D N D N D N D N D <br /> Prepared Date: 9/7/97 9/7/97 9/7/97 9/7/97 9/7/97 <br /> Analyzed Date: 9/7/97 9/7/97 9/7/97 9/7/97 9/7/97 <br /> Instrument I D #. H6 H6 H6 H6 H6 <br /> Cone Spiked 50pg/L 50ug/L 50pg/L 50ug/L 50ug/L <br /> Result 46 46 49 46 47 <br /> 46S % Recovery 92 92 98 92 94 <br /> Dup Result- 45 45 49 45 46 <br /> MSD % Recov - 90 90 98 90 92 <br /> RPD 22 22 00 22 22 <br /> RPD Limit. 0-25 0-25 0-25 0-25 0-25 <br /> LCS # VDBO90797 VDB090797 VDBO90797 VDBO90797 VDB090797 <br /> Prepared Date 9/7/97 9/7/97 9/7/97 9/7/97 9/7/97 <br /> Analyzed Date: 9/7/97 9/7/97 9/7/97 9/7/97 9/7/97 <br /> Instrument I D #: H6 H6 H6 H6 H6 <br /> Cone Spiked 50 ug/L 50 ug/L 50 pg/L 50 pg/L 50ug/L <br /> LCS Result. 45 46 49 48 47 <br /> LCS % Recov : 90 92 98 96 94 <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 /> 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 /> teegnner **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> anager 9709144 8LA �6> <br />