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CHROMALAB, INC. <br /> %F"" Environmental Services(SDB) <br /> August 15, 1997 Submission #: 9708106 <br /> HARDING LAWSON (SACRAMENTO) <br /> 1 Atten: Gary Haeck <br /> Pr03ect • TVG-THORNTON Project#: 38737 002 <br /> Received August 8, 1997 <br /> ' re Blank spike and duplicate report for Gasoline BTEX analysis <br /> Method: SW846 8020A Nov 1990 / 8015Mod <br /> Matrix: WATER <br /> Lab Run#. 8162 Analyzed: August 11 , 1997 <br /> Spike <br /> ' Spike Amount Amount Found Spike Recov <br /> BSP Dup BSP Dup BSP Dup Control % RPD <br /> Analyte (ug/L) (uq/L) M _ .(%) Limits RPD Lim <br /> ' GASOLINE 500 500 413- 420 82 . 6 84 . 0 75-125 1 . 68 20 <br /> BENZENE 100 100 92 .4 94 . 6 92 .4 94 . 6 77-123 2 35 20 <br /> TOLUENE 100 100 90 6 92 . 9 90 . 6 92 . 9 78-122 2 51 20 <br /> HYL BENZENE 100 100 93 . 9 95 7 93 9 95 7 70-1.30 1 - 90 20 <br /> POILENES 300 300 275 279 91 7 93 0 75-125 1 . 41 20 <br /> 1 <br /> 1 <br /> BS Smpl # 143292 <br /> BSD Smpl # 143293 1220 Quarry Lane• Pleasanton, California 94566-4756 aM,ns RUoo7730-34 <br /> (510) 484-1919• Facsimile (510) 484-1096 <br /> Federal ID #68-0140157 <br />