Representation of Metals Sources Without NPDES Permits. To explicitly model nonpoint and/or unpermitted sources in the Guyandotte River watershed, the existing GAP 2000 landuse categories were consolidated to create model landuse groupings, shown in Table 4-2. Several additional landuse categories were created and added to the model landuse groupings. The additional landuse categories are explained in the following sections. The updated landuse coverage provided the basis for estimating and distributing total aluminum, iron, and manganese loadings associated with conventional landuses. Contributions of relevant parameters from groundwater sources are also considered. In the case of naturally-occurring parameters, such as aluminum, iron, and manganese, it is important to consider and incorporate groundwater contributions for a more accurate representation of actual conditions. GAP2000 Category Table 4-2. Metals model landuse grouping Model Category Barren Barren land - mining / construction Cropland Row Crop Agriculture Mature Forest Shrubland Conifer Plantation Floodplain Forest Cove Hardwood Forest Diverse / Mesophytic hardwood Forest Hardwood / Conifer Forest Oak dominant forest Mountain Hardwood Forest Mountain Hardwood / Conifer Forest Mountain Conifer Forest Woodland Pasture Major Powerline Pasture/Grassland Planted Grassland Urban Impervious (See Table 4-3) Major Highways (90% impervious) Populated Area - mixed land Cove (15% impervious)r Light intensity urban (15% impervious) Moderate intensity urban (50% impervious) Intensive Urban (80% impervious) Model Category GAP2000 Category Urban Pervious (See Table 4-3) Major Highways (10% pervious) Populated Area - mixed land Cover (85% pervious) Light intensity urban (85% pervious) Moderate intensity urban (50% pervious) Intensive Urban (20% pervious) Water Surface Water 1 Surface Water 2 Wetlands Forested Wetland Shrub Wetland Herbaceous Wetland Abandoned Mine Lands (AML) The AML categories were broken down into three landuse categories: high walls, disturbed land, and abandoned mines. The abandoned mines represent either discharge from abandoned deep mines or seeps and leachate from other abandoned mine sites. Specific data regarding the three AML landuses was not available from the GAP 2000 landuse coverage. WVDEP provided AML landuse coverage data which were incorporated into the GAP 2000 landuse coverage. In order to incorporate these landuses to appropriately account for runoff and loading characteristics, the existing GAP 2000 landuse coverage was modifi...

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REPRESENTATIONS AND WARRANTIES OF PARENT AND MERGER SUB Parent and Merger Sub represent and warrant to the Company as follows:
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