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page 15 <br />detected in soil vapor at the project area in 2016 at concentrations above residential intrusion <br />screening values (ISVs). Tetrachloroethene (commonly associated with historical drycleaner <br />operations) was detected in the soil vapor at a concentration of 43 micrograms per cubic meter <br />(µg/m3) which is greater than ten times the established residential ISV for this compound of 33 <br />µg/m3. Additionally, DRO was detected in the groundwater at a concentration of 0.22 <br />micrograms per liter (µg/L) and tetrachloroethene was detected in the groundwater at a <br />concentration of 2.6 µg/L. The tetrachloroethene detections are likely due to an off-site source <br />(the former dry cleaner sites) located south of the project area. <br /> <br />Excavation during construction is likely to encounter contaminated soil and/or groundwater that <br />will require special management during construction. Additionally, previous Phase II ESA <br />information indicates the property soil is regulated for DRO and VOCs in select areas. A <br />Voluntary Response Action Plan (VRAP) has been prepared for the proposed project and has <br />been approved by the MPCA (Appendix B). <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 <br />measures to avoid, minimize or mitigate adverse effects from the generation/storage of solid <br />waste including source reduction and recycling. <br /> <br />During construction solid wastes generated will be typical of a residential construction project. <br />Construction waste produced during the construction of the project will be disposed of by a <br />license garbage hauler serving the Saint Anthony Village area. <br /> <br />For the post development period, the waste generated will be mixed municipal waste collected <br />and disposed of by a license garbage hauler serving the Saint Anthony Village area. As a <br />manufactured home/ RV park community, the site currently generates mixed municipal waste. <br />The proposed project will increase the amount of units and the amount of waste generated is <br />expected to increase. Saint Anthony Village encourages recycling and all license garbage haulers <br />serving the Saint Anthony Village area offer recycling options for their subscribers. <br /> <br />c. Project related use/storage of hazardous materials - Describe chemicals/hazardous materials <br />used/stored during construction and/or operation of the project including method of storage. <br />Indicate the number, location and size of any above or below ground tanks to store petroleum or <br />other materials. Discuss potential environmental effects from accidental spill or release of <br />hazardous materials. Identify measures to avoid, minimize or mitigate adverse effects from the <br />use/storage of chemicals/hazardous materials including source reduction and recycling. Include <br />development of a spill prevention plan. <br /> <br />During construction, some hazardous materials typical of a construction site (e.g. fuel oil) will be <br />stored in approved containers. As required by the NPDES Construction Stormwater Permit, the <br />fuel containers will be required to have secondary containment by either being bermed or stored <br />in a truck or other facility. Fuel trucks and any other hazardous materials are required to be <br />locked when not in use to avoid vandalism. <br /> <br /> <br />50