Laserfiche WebLink
C Impact DW-4: Long-Term Increases in Discharges of <br /> Industrial and Urban Pollutants <br /> E� <br /> F <br /> Construction and operations of the new airport facilities, industrial facilities,and commercial <br /> centers could result in increased discharges of pollutants in stormwater runoff associated with <br /> f7 vehicle traffic, industrial wastewater, and stormwater runoff from paved commercial areas. <br /> Contaminants that enter stream channels can increase turbidity, stimulate the growth of algae, and <br /> � introduce compounds that are toxic to aquatic organisms. The potential for increased discharges of <br /> ;•t� pollutants that could exceed RWQCB water quality objectives would be small because NPDES <br /> stormwater permit requirements exist for any applicable industrial facility that would locate in the <br /> developed Airport East property or the Air Metro Industrial Park. These requirements include <br /> preparation of a Storm Water Pollution Prevention Plan and implementation of BMPs that will <br /> minimize soil erosion and transport of pollutants. This impact is therefore considered less than <br /> significant. <br /> Mitigation Measure <br /> None required. <br /> F <br /> �� Impact DW-5: Exposure of New Development in the 100-Year Floodplain to Flooding <br /> l*' <br /> All areas planned for development northeast of the runways, with the exception of the area <br /> in the vicinity of the old abandoned runways, are currently located outside the 100-year floodplain <br /> (Figure 5-1). The areas between the old abandoned runways are subject to flooding of up to I foot <br /> in a 100-year storm (Brandley pens. comm.) Figure 5-1, which shows the Airport Layout Plan and <br /> the 100-year flood boundaries, indicates that air cargo ramps, air cargo and aircraft maintenance <br /> facilities, and industrial uses would be located within the 100-year floodplain. The Master Plan <br /> + states that all development planned within the 100-year floodplain will be constructed so that the <br /> grade elevation of all buildings is above the 100-year floodplain elevation. This impact is considered <br /> to be less than significant because all new facilities would be free from flood inundation. <br /> �[ Mitigation Measure <br /> F S <br /> F None required. <br /> r <br /> Stockton Metropolitan Airport Project Chapter 5. Drainage and Water Quality <br /> Draft Environmental Impact Report 5-10 March 20, 1998 <br /> i <br /> 1 <br />