Design of environmental monitoring well
ABS: The design of environmental monitoring well shall include the well casing, well screen, screen filter, annulus seals and well head protection. Well casing and well screen: Today, most of the monitoring wells will be constructed of polyvinyl chloride (PVC) or stainless steel, followed by low carbon or galvanized steel. Other materials (ABS, PE, PP) … Continue reading
Groundwater monitoring well design
The requirements to design the environmental monitoring w… Continue reading
Environmental Drilling Method for Groundwater Monitoring Well
Drilling technology is one of the necessary to construct a monitoring well. The drilling method depends on the specific site factors, including the geological conditions of the site, the type of pollutants expected, and the type of soil samples. … Continue reading
CHARACTERIZATION OF A FRACTURED AQUIFER USING THE COLLOIDAL BORESCOPE
Abs: Quantifying and characterizing groundwater flow in fracture flow systems is a difficult task due to the complexity of these systems. The recently developed colloidal borescope is a useful instrument that can provide direct measurements of flow velocity and direction from wells completed in fractures. Results from the field investigation using the colloidal borescope showed that groundwater flow directions in the unfractured zones agreed with the regional groundwater flow directions. In fractured zones, groundwater flow directions were in a direction corresponding to fracture trends that were different than the inferred potentiometric surface. Groundwater velocities in the fractures were an order of magnitude higher than velocities observed in the unfractured flow zones. The resultant flow direction of the unfractured and fractured flow zones agreed with the observed flow direction of a groundwater hydrocarbon plume… Continue reading
Photochemical Assessment Monitoring Stations (PAMS)
ABS: Section 182(c)(1) of the 1990 Clean Air Act Amendments (CAAA) required the Administrator to promulgate rules for the enhanced monitoring of ozone, oxides of nitrogen (NOx), and volatile organic compounds (VOC) to obtain more comprehensive and representative data on ozone air pollution… Continue reading