4.3 SR 03-20-2023 - Laserfiche WebLink

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No other surface water features (lakes, sti^eams, intermittent channels, or county/jurisdictional ditches) will be physically or indirectly altered during the construction or operation of the proposed project. The only water feature located on the project site is the DNR Public Waters watercourse Ti^ott Brook which meanders in and out of th�e project site along its western and southern boundaries. Ti^ott Brook was avoided during the preliminary design phase of the overall site plan (ExhibitA). Temporary erosion and sediment control best management practices (BMPs) will initially be installed (per the project's SWPPP), maintained/repaired, and amended throughout the construction phases to avoid indirect impacts to Ti^ott Brook. BMPs may include (but are not limited to) silt fence, bio-rolls/filter logs, rock consti^uction entrances, mulch/hydro mulch, and permanent native seeding or turf seeding in appropriate areas. Following construction, permanent consti^ucted stormwater treatment infi^astructure (e.g. infiltration basins, filtration basins, holding ponds, vegetated swales, etc.) will protect help Ti^ott Brook. This will provide storage and treatment to waters prior to discharging into Ti^ott Brook. 12. Contamination/Hazardous Materials/Wastes: a. Pre-project site conditions - Describe existing contamination or potential environmental hazards on or in close proximity to the project site such as soil or ground water contamination, abandoned dumps, closed landfills, existing or abandoned storage tanks, and hazardous liquid or gas pipelines. Discuss any potential environmental effects from pre-project site conditions that would be caused or exacerbated by project construction and operation. Identify measures to a�oid, minimiae or mitigate adverse effects from eXisting contamination or potential environmental hazards. Include development of a Contingency Plan or Response Action Plan. Minnesota Pollution Control Agency (MPCA) records do not indicate any current or former contamination sites within or immediately adjacent to the project area. The MPCA's What's In My Neighborhood database of known sites within proximity of the project area is illustrated on Appendi� A— Figure 10. There was one documented petroleum leak within one-half mile of th�e project site. This leak occurred at the Holzen Residence site located approximately 0.4 miles north of the project site. This site was issued regulatory site closure on March 27, 2009. The project proposer anticipates a minimal risk of encountering contaminated materials or groundwater during construction based on the lack of past land uses and due to geographic location of the listed leak sites in relation to the project area. Project consti^uction and operation is not expected to cause or exacerbate a pre project contaminated condition(s); th�erefore, �ro measures are plan�red to avoid, minimize, or mitigate adverse effects fi^om existing contamination or potential environmental hazards. Ifpotentially contaminated materials (or other environmental hazards) are discovered during construction activities, the project proposer/contractor will immediately cease activities in the area, the� take appropriate and reasonable actions to contain and reduce the human health/environmental risk prior to contacting the State of Minnesota Duty Officer Sherburne Cou�ty, and project proposer's represe�rtative. The developme�rt of a Contingency Plan or Response Action Plan will be initiated if analytical results characterize the discovered materials as a regulated contaminated waste. Page 13