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Page 27 <br /> <br /> <br />Cleanup Goals (SCG). “Arsenic, barium, cadmium, chromium, lead, and/or mercury were <br />detected” but non exceeded their respective MPCA Screening Limits and fell within ranges <br />typically regarded as naturally occurring. There were no detections above the respective <br />laboratory reporting limits for volatile organic compounds (VOCs), semivolatile organic <br />compounds (SVOCs), diesel range organics (DRO), or gasoline range organics (GRO) <br />(Appendix I). <br /> <br /> <br />Groundwater Analysis <br />Levels of Barium, Di-n-butylphthalte, and DRO were all below their respective health risk limits <br />or MDA/MPCA Screening limits. There were no detections above the laboratory reporting limits <br />for MDA List 1, MDA List 2, VOCs, or GRO (Appendix I). <br /> <br />Soil Vapor <br />Beneze, Chloroform, and a total of 20 other VOCs were detected but at levels not exceeding their <br />respective MPCA 33X Intrusion Screening Values (ISVs). 1,3-butadiene was detected at levels <br />exceeding the MPCA’s 33X ISVs but “in the absence of a source for this compound (such as <br />asphalt or rubber production) the MPCA does not consider this compound a release due to its <br />ubiquity in the environment.” (Appendix I). <br /> <br />The Phase II recommended and concluded the following. Recommendations from the Phase II <br />ESA will be followed and if contamination is found to be present, a Response Action <br />Plan/Construction Contingency Plan (RAP/CCP) would be prepared for the project area to <br />ensure contaminated media (if encountered) is managed in compliance with local, state, and <br />federal regulations during redevelopment. <br /> Buried diesel and gasoline tanks are planned to be removed in the spring of 2025 <br />“under Carlson McCain oversight, following MPCA guidance.” <br /> Detections of DRO in groundwater should be reported to the Minnesota Duty Officer. <br /> An additional round of four soil vapor samples should be collected from the same <br />locations but during the MPCA-defined non-heating season. <br /> <br />Prior to site development, underground storage tanks will be removed in accordance with local, <br />state, and federal standards. Surficial solid waste and hazardous chemicals/petroleum products <br />will be removed and disposed of in accordance with local, state, and federal standards. If <br />potentially contaminated materials (or other environmental hazards) are discovered during <br />construction activities, activities will cease in the area, appropriate and reasonable actions will be <br />taken to contain and reduce human health/environmental risk prior to contacting the State of <br />Minnesota Duty Officer, Sherburne County, and project proposer’s representative. The <br />development of a Contingency Plan or Response Action Plan will be initiated if analytical results <br />characterize the discovered materials as regulated contamination waste. <br /> <br />b) Project related generation/storage of solid wastes - Describe solid wastes generated/stored <br />during construction and/or operation of the project. Indicate method of disposal. Discuss <br />potential environmental effects from solid waste handling, storage and disposal. Identify