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filtration basins, holding ponds, vegetated swales, etc.) will protect help Trott Brook. This will <br />provide storage and treatment to waters prior to discharging into Trott Brook. <br />2.4.1.4 Contamination/Hazardous and Materials/Wastes <br />Pre -Project Site Conditions <br />Minnesota Pollution Control Agency (MPCA) records do not indicate any current or former <br />contamination sites within or immediately adjacent to the project area. The MPCA's What's In My <br />Neighborhood database of known sites within proximity of the project area is illustrated on <br />Appendix A — Figure 10. There was one documented petroleum leak within one-half mile of the <br />project site. This leak occurred at the Holzen Residence site located approximately 0.4 miles north <br />of the project site. This site was issued regulatory site closure on March 27, 2009. <br />The project proposer anticipates a minimal risk of encountering contaminated materials or <br />groundwater during construction based on the lack of past land uses and due to geographic location <br />of the listed leak sites in relation to the project area. Project construction and operation is not <br />expected to cause or exacerbate a pre -project contaminated condition(s); therefore, no measures are <br />planned to avoid, minimize, or mitigate adverse effects from existing contamination or potential <br />environmental hazards. <br />If potentially contaminated materials (or other environmental hazards) are discovered during <br />construction activities, the project proposer/contractor will immediately cease activities in the area, <br />then take appropriate and reasonable actions to contain and reduce the human <br />health/environmental risk prior to contacting the State of Minnesota Duty Officer, Sherburne <br />County, and project proposer's representative. The development of a Contingency Plan or Response <br />Action Plan will be initiated if analytical results characterize the discovered materials as a regulated <br />contaminated waste. <br />Project -Related Generation/Storage ofSolid Wastes <br />Solid and liquid wastes generated from construction materials and equipment are expected in <br />minimal amounts during periods of active construction. Wastes may include sediment laden <br />construction dewatering or typical construction debris associated with residential development <br />(lumber, siding, roofing materials, etc.).. The contractor will be required to immediately haul offsite <br />and/or temporarily store and dispose (or recycle) of all waste in accordance with MPCA regulations <br />and the NPDES Construction Stormwater Permit. <br />Project -Related Use/Storage ofHazardous Materials <br />Hazardous materials (portable fuel tanks and lubricants) may be used for equipment operations <br />during construction and temporarily placed onsite in sealed containers (at all times) and under <br />secured restricted access during non -working hours. These materials will only be used during active <br />construction for refueling and maintenance of construction equipment. To ensure that fuel spills do <br />not contaminate surface and ground waters, construction and maintenance activities would occur at <br />reasonable distances from surface waters and steep sloped areas. The contractor will be required to <br />abide by the Pollution Prevention Management Measures (Part IV.F.2) of the NPDES Construction <br />