Stockpiling procedures vary between civil engineering and mining operations. These differences and how they effect soil productivity will be discussed. Soil changes that occur when stockpiling techniques are used will also be discussed as will improvements and challenges in the use of this technique.
In this action, the Environmental Protection Agency (EPA) promulgates revisions to the Guideline on Air Quality Models (‘‘Guideline’’). The Guideline provides EPA’s preferred models and other recommended techniques, as well as guidance for their use in estimating ambient concentrations of air pollutants.
Under the National Environmental Policy Act (NEPA), the Agency conducts environmental analyses to assess the nature and importance of the physical, biological, social, and economic effects of a proposed action and its reasonable alternatives.
The Assessment Report presents and evaluates existing information about relevant ecological, economic, and social conditions, trends, and risks to sustainability and their relationship to the 1985 Tonto National Forest Land and Resource Management Plan, within the context of the broader landscape.
Dodder, Cuscuta species, is a parasitic annual plant that infests many crops, ornamentals, native plants, and weeds. More than 150 species occur worldwide, although dodder is most prevalent in the Americas.
This memorandum has been prepared to document the extent of oridinary high water mark (OHWM), aquatic features (seeps and springs), and potential WOTUS for compartitive analysis between the five TSF alternative footprints.
On 15 July 1981, a fire burned about 30 ha of Chihua— huan desertscrub community in the Franklin Mountains, El Paso County, Texas. Effects of the fire on shrubs and succulents were investigated by means of transects and study plots in November 1982, 16 months after the fire.
This memorandum provides a background of relevant state regulations and guidelines for assessing fault-related geohazards around tailings facilities, summarizes published geological mapping around the Skunk Camp TSF site, evaluates the Project’s assessments of Quaternary faulting, and provides recommendations to fill key knowledge gaps.
Phase I Environmental Site Assessment (ESA) for the Dripping Springs parcel, composed of approximately 160 acres located in Gila and Pinal Counties, Arizona.
