NREL - Closure of five Groundwater Monitoring Wells on STM Campus; NREL Tracking No. 15-025 Award Number: DE-AC36-08GO28308 CX(s) Applied: B5.3, DOE/EA 1968 National Renewable Energy Laboratory (NREL) Date: 06/26/15 Location(s): CO Office(s): ...
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June 26, 2015
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NREL - Closure of five Groundwater Monitoring Wells on STM Campus; NREL Tracking No. 15-025
Award Number: DE-AC36-08GO28308
CX(s) Applied: B5.3, DOE/EA 1968
National Renewable Energy Laboratory (NREL)
Date: 06/26/15
Location(s): CO
Office(s): Golden Field Office
The U.S. Department of Energy (DOE) proposes the abandonment of five existing groundwater monitoring wells at the National Renewable Energy Laboratory (NREL) South Table Mountain (STM) campus located in Golden, Colorado. Colorado regulations (2 CCR 402-2 Colorado Rules and Regulations for Water Well Construction, Pump Installation, Cistern Installation, and Monitoring and Observation Hole/Well Construction) require that monitoring wells that have not been actively used in the last two years, must be properly abandoned. Purpose of this project is to meet this requirement for the five ground monitoring wells on the STM campus that are no longer needed. The wells are 4” in diameter with total depths less than 25ft below ground surface. A well location figure has been uploaded to the PMC database.
Project activities would include the following:
- Remove surface concrete collar and vault box, recycling and disposing of properly
- Remove top 1 foot of casing
- Backfill well with silica sand up to 6 feet below ground surface (bgs)
- Backfill with neat cement grout from 6 feet bgs to 1 foot bgs
- Install utility locate marker ball
- Backfill with native soil from 1 foot bgs to ground surface
- Reseed and crimp mulch native soil and any other disturbed areas
- Complete and submit a Well Abandonment Report (Form No. GWS-09) for each of the five monitoring wells to be abandoned to Colorado Division of Water Resources.