The federal Clean Water Act requires that stormwater discharges from certain types of facilities be authorized under stormwater discharge permits. The goal of the stormwater permits program is to reduce the amount of pollutants entering streams, lakes and rivers as a result of runoff from residential, commercial and industrial areas. The original 1990 regulation covered municipal (i.e., publicly-owned) storm sewer systems for municipalities over 100,000 population. The regulation was expanded in 1999 to include smaller municipalities as well. This expansion of the program is referred to as Phase II.
This Air Quality Action Plan is the first step in implementing the CDOT Air Quality Policy Directive 1901. CDOT's air quality policy promotes a forward looking vision of sustainable fleet management to effectively control internal transportation emissions and guides public outreach and education to further the understanding of greenhouse gas (GHG) emissions and mobile source air toxics (MSATs). This Air Quality Action Plan outlines proactive strategies designed to reduce transportation related GHG, air toxics and other related pollutant emissions statewide, thereby reducing the need to negotiate such measures in an ad hoc manner. The Air Quality Action Plan targets program development encompassing transit and sustainable community development, multi-modal freight movement and efficiency, operational highway management, congestion and idling reduction, innovations in fueling, engine maintenance and monitoring, retrofits, and alternative vehicle technologies.
The purpose of this document two fold. First, it is to provide a comprehensive background summary of the Eagle Mine Superfund Site, the remedial activities that have taken place to date and to show the commensurate improvement in water quality and load reduction that have occurred as a result of the remedial actions. Secondly, the purpose of this document is to analyze the available metals loading data to determine if newly proposed water quality standards based on EPAs Recalculation Guidance for zinc, copper and cadmium are attainable.
Study to determine how a wildfire could affect the water supply for the Golden Water Treatment Plant, located in Golden, Colorado, and developing treatment strategies that address wildfire-inflicted water quality changes.
This update to the 2000 Nonpoint Management Program is intended to provide the near-term framework for program actions over the next five years. The actions identified in this document will lay the foundation to accomplish the long-term goals of the program.
A terraced 1:240 scale model of the China Lake Naval Weapons Center was constructed to a resolution of one foot vertical increments and placed in the wind tunnel to determine the distances of lower flammability limit (LFL) for 1980, 40 cubic meter spills of Liquefied Natural Gas (LNG) under 4 wind speeds, 5 wind directions, and neutral flow conditions. Measurements of mean velocities, turbulence intensities, velocity spectra and correlations were performed over the model in the wind tunnel capable of simulating atmospheric phenomena. Data analysis has produced peak concentrations, contours of LFL, and time progressions of the plume ground level LFL.
