Legal and environmental liabilities can arise from an assortment of statutes, regulations, and common law theories. The following key sources of liability have the potential to or do effect the concrete industry. The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) was enacted to clean up contamination left by hazardous waste management practices. It imposes strict liability for cleanup costs to potentially responsible parties. The Emergency Planning and Community Right to Know Act (SARA Title III) established a system of state and local emergency planning committees to address hazardous substances. Resource Conservation and Recovery Act (RCRA) provides for "cradle to grave" responsibility for hazardous wastes by regulating waste generation, and handling facilities. The Clean Water Act provided a permit program for discharges of pollutants into U.S. waters. The Clean Air Act established nationwide air quality standards.