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03/10/2005 15:57 5306766805 STRATUS NO CALIF PAGE 08110 <br /> Bamuc In Situ and Oa-Sita Biaremcdiatian SYMPOSinM June 2-5'2003 <br /> 0.1E 41 MSF W-01 <br /> 0.14 i �. ■ TBA Gast-al <br /> I • <br /> 0.12 i.-,it ,_ 4.. W-BE Sep-02 <br /> 0.10 <br /> 1 -MA SeP-02 <br /> 0-081 ei. 0.06 <br /> 0.04 *. I <br /> OM _ �- <br /> 0.00 atan <br /> p,�0 aG9. 070 P.aO arca. p.tfn P1Rn ai21t5o diJ6 ails ta0.ciao Qlil1E6 S*+n.+IcO <br /> Transect 3 monitoring wells <br /> FY.CrM 3c.MTBE and TBA mass flux across transect 3 <br /> (x-axis riot scaled to actual field splicing) <br /> Figure 3d is a plot for the difference between the dissolved oxygen {DQ} mass <br /> flux(based on DO measured iri wells) and the dissolved oxygen demand (DOD) exerted <br /> by the sum of the dissolved contaminants,in the treatment transect 2. The DO mass flux <br /> is the oxygen supplied to the groundwater system by one of the two delivery methods; <br /> this calculation assumes that oxygen is delivered over a length of the transect that is twice <br /> the well diameter. The DO measurements in transect l wells demonstrate oxygen is <br /> depleted upgradient and there is no contribution of background oxygen. The DOD <br /> calculation: is based on the contaminant mass flux across tilt entire transect: A positive <br /> DO mass flux in Figure 3d suggests the oxygen supply exceeds the calculated oxygen <br /> deruand; a negative value suggests the DOD exceeds the available oxYgen. On later <br /> sampling elates; DO mass flux is positive only on the western end of the transect. The <br /> high TPH concentrations illustrated in Figure 3b exert a significant oxygen demand on <br /> the western end of the transect. <br /> Transeat 2 W611Z <br /> 3 p't!i. o.e oia is o!a GNn. o-a ar-ne n,rctirena o!a.: <br /> ax. c: cF x.. ax qr �a o" oio <br /> Q <br /> _4 <br /> It <br /> -Sun-01 --X—545-02 - 9eP-o2 <br /> FIGURE 3d.Dissolved oxygen mass flux across transect 2 <br /> (x-axis not scaled to actual field spacing) <br /> 7 <br />