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The addition of lime can affect the pH(or acidity)of runoff,which can adversely affect nearby sensitive surface <br /> waters. Importation of topsoil is preferred over heavily liming and fertilizing exposed subsoil. <br /> 4-2.1.4 BMP C1.40 SOLID WASTE HANDLING AND DISPOSAL <br /> Solid waste is one of the major pollutants resulting from construction. It is generated from trees and shrubs <br /> removed during land clearing and human and building waste during the installation of structures. <br /> The following practices control and reduce solid waste on construction sites: <br /> - Provide adequate disposal facilities on the construction site. <br /> - Remove and dispose of collected solid waste at authorized disposal areas. <br /> - Label waste containers and locate them in a covered area. Keep lids closed at all times. <br /> Salvage and recycle any useful materials. <br /> - Conveniently locate and maintain sanitary facilities. <br /> - Selectively remove trees and other beneficial vegetation. <br /> 4-2.1.5 BMP C1.50 USE OF CHEMICALS/HAZARDOUS PRODUCTS DURING CONSTRUCTION <br /> Many types of chemicals may be used during construction activities. These chemical pollutants include paints, <br /> acids for cleaning masonry surfaces,cleaning solvents,asphalt products, soil additives used for stabilization and <br /> other purposes, concrete-curing compounds,and many others. These materials can be carried by sediment and <br /> runoff from construction sites. <br /> A large percentage of these pollutants can be effectively controlled through implementation of source control soil <br /> erosion and sediment control practices. By using only the recommended amounts of these materials and applying <br /> them in a proper manner,pollution can be further reduced. As in the case of other pollutants,good housekeeping <br /> is the most important means of controlling pollution. <br /> The correct method of disposal of wastes varies with the material. Wash-up waters from water-based paints may <br /> go into a sanitary sewer, but wastes from oil-based paints,cleaning solvents,thinners,and mineral spirits must be <br /> disposed of through a licensed waste management firm or treatment, storage and disposal company. Disposal of <br /> concrete products, additives,and curing compounds depends on the product. Information is available from the <br /> local health department or the Hazardous Substance Information Hotline(I-800-633-7585). <br /> The following are guidelines for managing hazardous products: <br /> - Buy and use only what is needed. Store,re-use,give away,recycle, or dispose of leftovers safely. <br /> - Read and follow directions on the label. Hazardous products may be labeled as any one or more of the <br /> following: <br /> Danger Poisonous Volatile Combustible <br /> Caustic Explosive Warning Corrosive <br /> Flammable Caution <br /> - Keep products in their original containers whenever possible. If the product must be transferred to <br /> smaller containers, use the proper size funnel and avoid spills. Label all containers. <br /> - Prevent labels from falling off due to weathering by covering the label with transparent tape. To re-label, <br /> use a metal tag attached to the container or use a stencil and spray paint. <br /> 4-2-3 <br />