摘要: |
The Virginia Department of Transportation (VDOT) is responsible for maintaining more than 57,000 miles of roadway. A large part of this maintenance effort comprises the implementation of VDOTs snow removal and ice control program. In fiscal year 2003, VDOT purchased more than 570,000 tons of sodium chloride. This salt, along with various other deicing chemicals, is stored at each VDOT residency and area headquarters, for a total of 292 locations throughout the state. Most of the storage facilities comprise a building to stockpile the chemicals, an adjacent impermeable pad that serves as a loading area for trucks, and a stormwater storage pond or collection basin. The objectives of this study were to assess the quantity and quality of salt-contaminated water generated from stormwater runoff at VDOTs salt storage facilities and to evaluate management/treatment alternatives to reduce costs and better protect the environment. To achieve the first objective, data regarding detention pond surface area and volume, runoff area, and several key water quality constituents were collected from five randomly selected storage facilities in each of VDOTs nine districts, for a total of 45 sampling sites. |