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404 N Wiget Lane <br /> Sequoia Walnut Creek C 94598 <br /> k!D (925)988 8-9600 <br /> FAX(925)988-9673 <br /> qco Analytical www secluoialabs com <br /> lAdak <br /> Weston-Vallejo Project San Joaquin HSA <br /> J7VdllelO <br /> ,,2135 Prolea Number San Joaquin HSA Reported <br /> CA 94542 Project Manager Scott Lool.tngbill 26-May-00 18 37 <br /> Volatile Qrc anic Compounds by EPA Method 8260A - Quality Control <br />' Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> nalyte Reault limit Untth Level Result %REC Limits RPD Limit Note.,, <br /> itch OE23015- EPA 5030B [P/T] <br /> lank(OE23015-BLKI) Prepared&Analvzed 22-Mav-00 <br /> rt-Buty] sl�ohol ND 100 ug/l <br /> Methvl tert butyl ether ND 2 0 <br /> Ii " <br /> cpropyl ether ND 2 0 <br /> hyl tent-butyl ether ND 2 0 <br /> tert,Vinyl methyl ether ND 2 0 <br /> f <br /> rrogate Dibrornofluoromethane 500 500 100 50-150 <br /> —gate 1 2 Drchloroethane-d4 540 500 108 50-150 <br /> Blank(OE23015-BLK2) Prepared&Analyzed 23-May-00 <br /> I"-Butyl alcohol ND 100 ug/I <br /> ethyl tert-butyl ether ND 20 " <br /> Di-rsopropvl ether ND 20 <br /> wy, <br /> butyl ether ND 20 <br /> methyl ether ND 20 <br /> Surrogate Dibrornofluoromethane 500 500 100 50-150 <br /> fi-rogate 12-Drchloroethane-d4 550 500 110 50-150 <br /> CS (OE23015-BS1) Prepared&Analyzed 22-May-00 <br /> lvlcthyl tert-hutyl ether 518 20 ug/l 500 104 70-130 <br /> lrrogale Dibromofluoroinelhane 51 0 500 102 50-150 <br /> urrogate 12-Drchloroethane d4 540 500 108 50-150 <br /> LCS(OE23015-BS2) Prepared&Analyzed 23-May-00 <br /> (ethyl ten butyl ether 525 20 ug/1 500 105 70-130 <br /> urrogate Dibroinofluoromethane 320 500 104 50-150 <br /> Surrogate 12-Drchloroethane-d4 550 500 110 50-150 <br /> tatrix Spike((IE23015-MSI) Source W005304-02 Prepared&Analyzed 22-May-00 <br /> sth}I tert-butyl ether 53 5 20 Ug/I 50 0 ND 107 60-150 <br /> frrrogare <br /> ogate Drbrornofluoroinethane 51 0 500 102 50-150 <br /> 12-Drchloroethane-d4 560 500 112 50-150 <br /> Ewa Analytical - Walnut Creek The results ur this report apply to the samples analyzed in accordance with the chain of <br /> cusior&document T{us analytical report mull be reproduced in its entirety <br /> Page 9 of 11 <br />