The redevelopment site is situated on two historic landfills including the Arapco Landfill and Herbertson’s Pay Dump. The first phase of the project will require removing a substantial amount of this waste to provide a sound subsurface for constructing roads, utilities and buildings. While it is likely the contents are mostly municipal solid waste, there is the potential some hazardous waste, storage tanks and contaminants may be encountered during the excavation process.
The developer has taken substantial proactive measures to manage potential health and safety concerns with regard to redeveloping the site.
Walsh Environmental Scientists and Engineers as a consultant to WMS has developed a site-wide Voluntary Cleanup Plan (VCUP) which outlines the extensive precautionary measures contractors and employees will take to conduct a safe cleanup. The VCUP was approved by the Colorado Department of Public Health and Environment on April 18, 2006.
Odor, Dust and Debris Control
Impact Timeframe: October 2006 – May 2007
During the trash removal phase, there is the potential for odors, dust and debris to travel to adjacent and nearby properties. The City of Sheridan, Tri-County Health Department, CDPHE the developer and its contractors recognize this issue and concerns and will take measures to limit these nuisances, which are not a health risk. This includes limiting the area of landfill excavation, using soil cover, chemicals and foams to reduce odors. The landfill excavation and replacement with clean fill material will be done on a continuous basis to minimize the area of exposed landfill material and to get the work done as soon as possible. For odor-related questions or concerns, please call 303.223-6584.
Methane Gas and Vapor Mitigation in New Development
As the solid waste materials within the old landfills decay over time, they create methane gas. Methane gas is colorless and odorless with little health threat as gas dissipates into the air. But it may impact groundwater or can be explosive if allowed to build up in poorly ventilated areas. In designing the improvements of River Point, the developer has taken preventive measures to avoid potential methane gas buildup within the new buildings and utility corridors similar to a radon system. Buildings will contain an active vapor mitigation system, consisting of a below floor slab venting system with monitors and alarm systems. In addition, all utility corridors and parking lots will be designed with passive venting systems to safely vent methane and any below surface gasses harmlessly to the atmosphere. All systems will be designed and installed in accordance with the CDPHE approved Vapor Mitigation Plan.
To review a copy of the official VCUP, please contact Rob Beery, Miller Weingarten Realty (303) 799-6300, or rbeery@millerweingarten.com.
