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,i <br /> s+ <br /> (D- Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Crcek,CA 94598 {510} 988 9600 FAX(S1Q)988-9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> Gettlei Ryan`/Geostrategles 'Cli6nt Project ID IChevron 9-6171, Stockton <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dubin, CA 94568 <br /> Attention Argy Leyton Work Order# 9508F98 -06, 07 Reported Aug 29, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloroethene Trichloroethene Benzene Toluene Chloro- <br /> benzene <br /> QC Batch# MS0824958240F2A MS0824958240F2-A MS0824958240F2A MS0824958240172A MS0824958240F2A <br /> Analy Method EPA 8240 EPA 8240 EPA 8240 EPA 8240 EPA 8240 <br /> Prep Method - - - - - <br /> Analyst L Zhu L Zhu L.Zhu L.Zhu L.Zhu <br /> MS/MSD # 95081)74-03 9508D74-03 9508D74-03 9508D74-03 9508D74-03 <br /> Sample Cone N D N D N D N D N D <br /> Prepared Date - - - - - <br /> Analyzed Date. 8/24/95 8/24/95 8/2495 8/24/95 8/2495 <br /> Instrument I D # F2 F2 F2 F2 F2 <br /> Cone Spiked 50 ug/L 50 ug/L 50 ug/L 50 ug/L 50 ug/L <br /> Result 53 51 54 52 51 <br /> MS % Recovery 106 102 108 104 102 <br /> 0Dup Result 50 51 54 53 53 <br /> MSI] % Recov 100 102 108 106 106 <br /> RPD 58 00 00 19 38 <br /> RPD Limit 0-50 0-50 0-50 0-50 0-50 <br /> LCS # <br /> Prepared Date <br /> Analyzed Date <br /> Instrument 1.13 # <br /> Conc Spiked <br /> LCS Result <br /> LCS % Recov <br /> LCS DL-234 71-157 37-151 47-150 37-160 <br /> Control Limits <br /> Please Note <br /> The LCS 1s a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> kEQUOI ALYTICAL 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 /> Mike regory Y*MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager 95081798 GET <4> <br />