Project Name: Denargo Market, Denver, Colorado
Date Project Began: February 2008
Date Project Completed: Ongoing
Project Description: Casey Resources Inc. (CRI) has been extensively involved in the environmental assessment, planning, and materials management of the Denargo Market Development Project located in the City and County of Denver (CCOD), Colorado. The Denargo Market Development consists of approximately 36-acres of land located in central Denver and is planned to be one of the highest density site developments in Denver. Under contract to Denargo Market LP, CRI has performed a portion of the Phase I Environmental Site Assessments (ESA) for the properties that now make up the 36-acre site and completed Phase II ESA subsurface investigations for proposed right-of-ways, Block 3, and Block 4 of the development area. CRI completed modifications to the Voluntary Cleanup Plan (VCUP) Application which had already been approved by the Colorado Department of Public Health and the Environment (CDPHE). The modifications to the VCUP were approved and CRI developed a detailed Material Management Plan (MMP) for management of lead and Polynuclear Aromatic Hydrocarbons (PAHs) impacted soil at the site, which was subsequently approved by CDPHE and the City and County of Denver. As part of the MMP development, CRI negotiated with the City and County of Denver for a reduction in the right-of-way over excavation for the street and utility corridors from the initial 20-foot excavation depth requirement to eight feet. The reduction in excavation and import soil costs provided a significant savings to Denargo Market, LP while maintaining the standards of right-of-way acceptance for the CCOD. During the Roadways and Utilities phase of the development, CRI provided daily environmental monitoring of all excavation activities at the site. This monitoring included the collection of soil samples for analysis of PAHs and metals, field screening of soils using x-ray fluorescence (XRF) field equipment, visual inspection for potential Asbestos Containing Material (ACM), and monitoring of import and manifested export soil. CRI tailored the MMP to account for the actual environmental conditions encountered during construction, including the management of ACM. The first phase of development activities were completed during the period from February 2008 through April 2009, at which time further development work was temporarily halted due to the economy. CRI prepared an Interim Construction Completion Report, which documented the development activities completed during that time. This report provided evidence that impacted soils disturbed during the development were managed appropriately, following those plans as outlined in the approved MMP and VCUP for the site.
The second phase of development activities at the site began in 2011. Environmental monitoring of all soil disturbing activities was performed by CRI during the remaining street and utility corridor construction. As first phase building construction was being performed on Lot 1 Block 3, monitoring of soil disturbing activities required for building pier and foundation construction was performed by CRI. Where asbestos-in-soil conditions were encountered, CRI performed daily monitoring and confirmation sampling for the remediation efforts of licensed asbestos abatement contractors. In addition CRI performed confirmation testing of the passive vapor venting system installed beneath the first phase building. CRI completed Environmental Construction Completion Reports for the Roadways and Utilities and the first phase building construction and obtained No Action Determinations from CDPHE for both projects. Continued building development is planned for 2014.
Type of Contamination: Metals contamination, PAH, and ACM