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N.C. Department of Environment and Natural Resources

NC Department of Environment and Natural Resources
Waste Management - Submitting New Monitoring Plans

Waste Management

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General Guidelines for Environmental Monitoring at Solid Waste Landfills

The following information is intended to provide guidance for submitting a new groundwater and monitoring plan for a solid waste landfill.

As referenced in the North Carolina Solid Waste Management Rules (15A NCAC 13B, Section .0600), solid waste management facilities are required to provide such groundwater monitoring capability as the Division of Waste Management determines to be necessary to detect the effects of the facility on the groundwater in the area. In order to comply with this requirement all facilities must have an approved groundwater monitoring plan. Our office recommends that all water quality monitoring plans be prepared by an environmental consulting firm under the seal of a board certified licensed/professional geologist that has experience with the design and construction of groundwater monitoring wells and plans. Since groundwater monitoring wells are significantly different in design from drinking water wells, the wells should be installed by a certified well driller with experience in the construction of groundwater monitoring wells. Monitoring plans should include the following information:

1. A site map delineating the entire landfill and adjacent properties. This map should clearly show the permitted location of the landfill with respect to the entire property.

2. A site-specific topographic map of the landfill area itself illustrating the configuration of the landfill pursuant to the permit description. Also indicated should be areas of landfilling activities (if active), and proposed groundwater monitoring well locations.

3. A sampling and analysis plan that describes sample collection and handling. A groundwater monitoring system has at least one upgradient well. The number of downgradient wells is site-specific. Numbers and locations are based on topography, geologic conditions, and hydrogeological features. Most detection monitoring wells are designed to monitor the upper portion of the aquifer and consequently are not deep. The groundwater monitoring wells are constructed of 2 inch PVC pipe and have a screened interval to allow the infiltration of water. They are installed in a borehole with a sand filter pack around the screen and bentonite clay seal over the filter. The remainder of the borehole is grouted to the ground surface and a protective casing is installed over the riser.

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