08-01-2022 Council Work Session Packet

Home Search

aALLIANT ENVIRONMENTAL ASSESSMENT WORKSHEET II Robinson Sod Farm PAGE 17 Management Practices that are proposed to avoid or minimize turbidity/sedimentation while physically altering the water features. Discuss how the project will change the number or type of watercraft on any water body, including current and projected watercraft usage. There is one public Anoka County ditches, ACD-10-22-32 Main Trunk and Branch 2, and private ditches on the project site. The field wetland delineation, that will be completed in the summer 2022, will identify these areas in the report. The project site is mapped within the 100 year FEMA floodplain area which corresponds with the Rice Creek Watershed floodplain area (Appendix A, Figure 7). See Item 8 for the list of approvals related to floodplain alteration. 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. The MPCA's "What's in my Neighborhood" (WIMN) search indicated there is 1 brownfield determination on the project site and one petroleum tank release to the immediate north. Braun Intertec conducted the following investigations on the site: • Environmental Sampling Report, December 22, 2016 • Phase II Environmental Assessment, January 11, 2019 • Level 1 Assessment, March 12, 2020 • Environmental Excavation Report, March 12, 2020 • Phase 1 Environmental Site Assessment, March 8, 2022. The MPCA issued a no action letter on May 27, 2020. In the letter, they stated that the extent and magnitude of the release(s) have been defined, and the identified contamination does not pose a risk to human health or the environment at this time. They also stated that future development of the site should assume that petroleum contamination is present, and the MPCA should be notified if any is encountered during future work (MPCA Site ID BF0001475). The project proposer will develop a plan to remove petroleum contamination prior to the development of the site. The tank release to the immediate north (across CSAH 14) was closed by the MPCA. In their Petroleum Tank Release Site File Closure letter, dated September 19, 2008, they also state that future development in the area should assume that petroleum contamination may still be present (MPCA Site ID LEAK00016576).