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A:The type of redevelopment and the location will drive the level of vapor/radon mitigation incorporated in the redevelopment and construction plans. For example, structures constructed with underground parking require less/no additional mitigation for vapors. Where construction of other types of structures will occur in areas of known VOCs, then vapor barriers and passive or active mitigation systems may be required as part of construction. This has been added to the Mitigation Plan under Item 12. \[potential additional response from City building official expected week of 6/16\] Currently all residential buildings regulated by the residential state energy code, chapter 1322, are required to have radon control per the 2006 International Residential Code Appendix F – Radon Control Control Methods, with state amendments. The location on site of residential buildings does not matter as all residential buildings need to have radon control. Commerical buildings are not required to have radon control but are required to have a six millimeter vapor retarder with joints lapped to a minimum of six inches applied directly beneath the concrete slab, per Internatinal Building Code 1910: Minimum slab provisions. All buildings are requied to have the foundations either damproofed or waterproofed per state building code, International Building Code section 1807 (commercial buildings), and International Residential Code section 406 (residential buildings). The above items are mandatory per the state building code adopted by the City of Arden Hills and have been added to the Mitigationi Plan under Item 12. B:Remediation to MPCA Tier 1 Residential Soil Reference Values will occur. Soil gas risks will be mitigated as described in response to the previous comment. Documents are available for review at Ramsey County Office of Property Management, Metro Square, Suite 2200, 121 Seventh Place East, Saint Paul, MN 55101. C:Soil gas risks will be mitigated as described in response to Lyle Salmela Comment A. D:Exact phasing has not been determined, although it is anticipated that Phases 1 and 2 will be completed prior to Phases 3 and 4. This is driven by a variety of factors including existing access locations, funding, phasing,changes in traffic patterns caused by the development, and available roadway capacity. A connection is planned from County Road H to northbound I-35W/TH 10 at what could be a roundabout controlled intersection. E:This analysis considers the anticipated growth in regional traffic and programmed projects that would impact the regional roadway network. Appropriate involvement by a variety of governmental entities will occur, as required, during future planning and design activities and as part of the Metropolitan Council's Transportation Policy Plan. June 2014A-36