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VE-111" <br /> . <br /> air /ti <br /> 1 <br /> Figure 22 shows the vertical distribution of hydrocarbon <br /> contamination in a north-south cross-section D-D' at the west <br /> �. side of the site. The illustrated contamination is closely <br /> related to the zone 3 water table. <br /> YLate r__Wel l .'ampacts <br /> Figure 23 depicts the location of irrigation and domestic <br /> groundwater wells in the vicinity of the site. seasonal � <br /> operation of the irrigation wells in the vicinity of the site <br /> f>t has the greatest impact on groundwater gradients on the site. <br /> Domestic groundwater pumping is limited. The potential for <br /> }' off-site migration of contaminants impacting adjacent domestic <br /> water wells is small. The on-site domestic well is being sampled . <br /> for analysis regularly, and continues to be uncontaminated. a. <br /> EI3E I L ACTION L A I t <br /> There are numerous remediation strategies that could be employed. <br />�SacK <br /> _ These will be discussed in order. <br /> 1. Soil excavation <br /> - 2: On-site soil aeration ' <br /> 3. Soil flushing <br /> r ,Aa 4 Continue the current air stripping program <br /> 5. .Soil venting <br /> 6.: Natural biodegradation <br /> � 7. � „g.bioremediation___ <br /> 19 <br /> if <br /> - <br /> .:TY1 <br />