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03/10/2005 1-5:57 530676&ng5 STRATUS NO CALIF PAGE 05/10 <br /> t3acx11e In sial and 06-site Bi0feMediatioa SYMP06M June 2-5,2003 <br /> r <br /> Ic <br /> i <br /> ' cA+ <br />�" G,,a, u► �T C� a.c <br /> �.• Hlpiag7+Y <br /> l <br /> �4.TO6 tt'.t► <br /> Ar' <br /> j <br /> rl•CSM <br /> urew'rnw+� <br /> 2 <br /> FIGU" a.' <br /> Mass ;Tahoe Cita site map vvit11 transect contaminant <br /> >rizontal well. <br /> cortcentratior. <br /> pumping at its min <br /> imurn flow rate. Mass flux estimates were completed for exec <br /> z oniturina events, illustrated in Fixe 2b. An air sparg ng system has been in operation <br /> since December 20W. [.sing Equation 2, based on the pre-spargin mass flux in s ay <br /> 0.9 <br /> i <br /> 1999,the maximum concentration that could potentially be measured in the river was 4.9 <br /> �tgll-,. This calculation assumes'Cbetween the transect and river theta Is no mass loss and <br /> f no additional contarninant sourd%. The predicted river concentration decreased to 0,2- <br /> by February 2002_and less than 0.1 gg/L by September 2002. <br /> p <br /> i <br /> I <br />�, 1Q•d <br /> i <br /> 6.0 <br /> N <br /> 0.0 <br /> May-99 SOP-99,Ian-do Mey oo se'P-oo .Jan-o1 May-ol SOP-01 Jan-02 May-02 Sep-02 <br /> i <br /> i <br /> FIGURE 2b.Tahoe'[0ty WBE mass flux vs.time at the transect <br /> Design !Performance Evalu�t€on of Remediation SysteX ns. Klass flux estimates can <br /> be used to evaluate the need for remediation, and where,appropriate, desinn and scale in- <br /> 4 <br /> 1 <br />