2016-07-13_PC_Agenda_Packet - Laserfiche WebLink

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Response Action Plan and Construction Contingency Plan June 10, 2016 Attachment C Former PIK Terminal, Roseville, MN Previous test locations are shown on Figure 2. Please refer to the investigation documents associated with Leak#1326 and SR387 for the results of the soil, groundwater, and soil vapor investigation conducted on the property. 1.4 Proposed Development Plans No development is proposed at this time. 2. MONITORING PLAN 2.1 Overview The goal of the voluntary response actions is to appropriately manage any impacted soil, concrete, or bituminous that is encountered during concrete and bituminous removal in accordance with risk-based criteria established by the MPCA, and properly dispose of any impacted soil, concrete, or bituminousat a permitted solid waste landfill. Soil below the concrete and bituminous is known to be impacted with volatile organic compounds (VOCs), gasoline range organics (GRO), and diesel range organics (DRO). 2.2 Concrete and Bituminous Crushing and Stockpiling The general contractor responsible for concrete and bituminous removal, crushing oversight, and consolidation will be Forest Lake Contracting. Site security will be the responsibility of the general contractor. It is expected that fencing and signage will be furnished to alert pedestrians to keep out of the construction zone. The area of concrete and bituminous that is to be removed is shown on Figure 3. Material removal will be performed by conventional excavation equipment. The property currently features four above grade monitoring wells that will not be removed or otherwise disturbed as part of this work. Concrete or bituminous parking and drive areas surrounding the wells may need to be removed with hand tools or small excavators to avoid damage by large equipment. Any wells that are damaged will be promptly repaired or replaced. Erosion control will be implemented in accordance with the permit. All permits will be obtained by the contractor as necessary. Crushing operations will be located on the far western edge of the property; the maximum distance from residential areas east of Langton Lake. The contract for the crushing operations will require the crushing contractor to have on-site water available to control visible dust. The project manager with Forest Lake Contracting has indicated that the material to be crushed is approximately 60% concrete and 40% bituminous and, based on his experience, adding bituminous to the mix reduces dust generation. The crushing equipment will also have a misting system over the chute where material exits 3