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|Title:||Conceptual design interim ground-water recharge system, RMA North Boundary Area|
|Authors:||Rocky Mountain Arsenal Contamination Cleanup. Office of the Program Manager.|
Lutton, R. J.
Hazardous waste sites
Rocky Mountain Arsenal
|Publisher:||Geotechnical Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; GL-88-35.|
Abstract: Gravel-filled trenches were recommended as the best option for the proposed interim ground-water recharge system for the portion of the North Boundary Containment and Treatment Facility west of D Street. Ten trenches, each averaging 100 ft long, 15 ft deep, and 2 ft wide were expected to return treated groundwater to the subsurface at a rate up to 185 gal/min. The lower portion of the trench contains gravel penetrating the aquifer an average 3 ft in depth. The gravel prism contains a perforated pipe to feed water evenly along the trench. The line of trenches are positioned 45 ft north of the barrier wall at the east but may be angled away on the western half to accommodate topography. Water is fed through main line and laterals generally descending from the effluent sump of the existing plant. The cost of the 10-trench system was estimated approximately as $79,000. Viewed in terms of a cost factor, an investment of $100,000 (1986) should give a system capable of up to 268 gal/min. This capacity substantially exceeded expectations from recharge wells, ponds, and shallow-gravel trenches.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Miscellaneous Paper|