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CHROMALAB, INC. <br /> Emironmental Services(SOB) <br /> December 31, 1998 Submission #: 9812353 <br /> DIETZ IRRIGATION <br /> Atten: Bernie Dietz <br /> Project: NAVARRA <br /> Received: December 21, 1998 <br /> re: Blank spike and duplicate report for Gasoline BTEX analysis . <br /> Method: SW846 8020A Nov 1990 / 8015Mod <br /> Matrix: SOIL <br /> Lab Run#: 16734 Analyzed: December 29 , 1998 <br /> Spike <br /> Spike Amount Amount Found Spike Recov % <br /> BSP Dup BSP Dup BSP Dup Control $ RPD <br /> Analyte (mv/Kcr) (md/Ka) M M Limits RPD Lim <br /> GASOLINE 12 . 5 12 . 5 12 . 6 14 . 0 101 112 65-135 10 . 3 35 <br /> BENZENE 2 . 50 2 . 50 2 . 59 2 . 58 104 103 77-123 0 . 96 35 <br /> TOLUENE 2 . 50 2 . 50 2 . 60 2 . 56 104 102 78-122 1 . 94 35 <br /> ETHYL BENZENE 2 . 50 2 . 50 2 .49 2 .49 99 . 6 99 . 6 70-130 0 35 <br /> XYLENES 7 . 50 7 . 50 7 . 76 7 . 76 103 103 75-125 0 35 <br /> v <br /> BS Smpl #: 223232 <br /> BSD SmpL #: 223233 1220 Quarry Lane • Pleasanton, California 94566-4756 a®,ae wuc saws <br /> (925) 484-1919 • Facsimile (925) 484-1096 <br /> Federal ID #68-0140157 <br />