Agenda - Council - 04/13/2021 - Laserfiche WebLink

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Riverstone South EAW January 2021 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 avoid, minimize or mitigate adverse effects from existing contamination or potential environmental hazards. Include development of a Contingency Plan or Response Action Plan. About 70% of the project area has been in agricultural use since at least the 1930s and the remaining 30% has been in woodland and grassland. The project area does not include any known pipelines, transmission lines, or registered storage tanks. The site is not known to include environmental hazards and the agricultural land use history suggests a low potential for environmental contamination. The project area is not known to include previous building sites, disposal areas, storage tanks, pipelines, or utility corridors. Carlson McCain completed a Phase I Environmental Site Assessment (Phase I ESA) for the property in August 2020, and did not identify evidence of recognized environmental conditions or historical recognized environmental conditions in their assessment. The Phase I ESA reported that the site contained no buildings, and recognized that the past agricultural land use generally involved use of pesticides and herbicides, some of which can persist in the environment. However, no evidence of bulk storage or improper application of agricultural chemicals was identified. The conclusions and summary from the Phase I ESA are included in Appendix D. What's in My Neighborhood Review of MPCA and Minnesota Department of Agriculture (MDA) "What's in My Neighborhood" (WIMN) interactive websites did not identify any potential contamination sites, environmental permits, or registrations located within the project area. However, within an 0.25-mile radius of the project area, the MPCA WIMN website identified 10 sites, including six construction stormwater permit sites, two hazardous waste sites, one petroleum brownfield site, and one petroleum leak site (Table 7). The MDA website did not identify any spills, incidents, or contingency areas within 0.25 mile of the project area. The construction stormwater permit sites relate to recent or ongoing construction projects approved in the vicinity of the proposed project. The MPCA file on the brownfield site has been closed since 2007. One of the hazardous waste sites is a very small quantity generator and the MPCA file on this other is hazardous waste site is inactive. None of these sites are known to pose an environmental contamination threat to the project area. The MPCA's WIMN database identified the Dave Nathe Farm as a nearby petroleum Leak Site. This Leak Site is located about 320 feet north of the northwest corner of the project area (Figure 7). The MPCA lists it as Leak Site 6487. The Leak Site is described in the Phase I ESA (Appendix D) 19