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M <br /> Sequoia 415 364 9600 FAX(415) 364 9233 <br /> uoia 680 Chesapeake Drive Redwood Cary CA 94063 ( ) FAX(510) 988 9673 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(916) 921 0100 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 <br /> "Get'tler Ryan/Geostrategies Client Project ID Chevron 9-6171, Stockton <br /> ;6747 Sierra Court, Ste J Matrix q <br /> uid <br /> Dublin, CA 94568 Reported Aug 29, 1995 <br /> .Attention Argy Leyton Work Order# 9508F98 -05 <br /> QUALITY CONTROL DATA REPORT <br /> Toluene Chloro- <br /> Analyte i,1-Dichloroethene Trichloroethene Benzene benzene <br /> MS0824958240F3 MS0824958240F3 <br /> QC Batch# M34824958240F3 MS0824958240F3 MS0824958240F3 EPA 8240 EPA 8240 <br /> Analy Method EPA 8240 EPA 8240 EPA 8240 - - <br /> Prep M <br /> ethodd <br /> L Duong L Duong <br /> Analyst L Duong L Duong L Duong 950881B-04 <br /> MS/MSD # 950881B-04 950881B-04 950N 9508818-04 4 N D N D <br /> Sample Conc N D N°are8/21/95 <br /> 2i <br /> Prepared Date. 8/21/95 8/21/95 8/ /95 8/21/95 8/24/95 <br /> p 8/24/95 8/24/95 8/24/95 <br /> Analyzed Date. 8/24/95 F3 F3 F3 <br /> Instrument t D # F3 F3 500 ug/L 500 ug/L <br /> Conc.Spiked 500 ug/L 500 ug/L 500 ug/L <br /> 510 500 500 - <br /> Result- 510 480 100 <br /> MS %Recovery* 102 <br /> 96 102 i� <br /> 520 520 <br /> Dup Result, 520 510 530 104 <br /> MSU %Recov ' 104 <br /> 102 106 104 <br /> 39 39 <br /> RPD 1 9 0-501 3 8 0-50 <br /> 0-50 0-50 <br /> RPD Limit 0-50 n <br /> v Y . `ir vn rz ♦ v. r ,. v r ♦ v <br /> LCS # <br /> Prepared Date- <br /> Analyzed Date <br /> Instrument I D # <br /> Conc Spiked <br /> LCS Result. <br /> LCS % Recov <br /> LCS DL-234 71-157 37151 <br /> 47-150 37-160 <br /> Control Limits <br /> Einterference, <br /> LCS is a control sample of known,lnterlerent-fres matrix that is analyz=datgr <br /> me reagents, <br /> SEQUOIA ANALYTICAL ,and analytical methods employed for the samples The matrix sot of sample <br /> h known quantities of specific campounds and subjected to the enrocedure if <br /> of analytes from the matrix spike does not fall within specified coto matrix <br /> e,the LCS recovery is to be used to validate the batch <br /> Mike Gregory MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9508F98 GEr <3> <br /> Project Manager <br />