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Adelaide Landing Residential Development EAW, Hugo January 31, 2017 1) If the wastewater discharge is to a publicly owned treatment facility, identify any pretreatment measures and the ability of the facility to handle the added water and waste loadings, including any effects on, or required expansion of, municipal wastewater infrastructure. Only normal domestic wastewater production is expected from the project. The types of wastewater produced will be typical of new residential developments. No on -site municipal or industrial wastewater treatment is anticipated or planned. Because wastewater is from domestic sources, pre-treatment measures have not been contemplated. According to the City's approved Comprehensive Sanitary Sewer Plan (Chapter 10) and Metropolitan Council's 2040 Water Resources Policy Plan, the project is within an existing MUSA and categorized as "Emerging Suburban Edge". A comprehensive sanitary capacity analysis has been completed for the project. The Project area is planned for service from within two sewer districts and sufficient capacity exists in the City's overall system to support additional connections from the development. The proposed development as planned will require a change to the specific sewer districts in the Comprehensive Plan, which will require a modification to the existing forcemain discharge from the lift station on 130' Street. The final routing of sanitary sewer, as well as the required improvement to the 130' Street system, will be reviewed and approved by City Engineering staff prior to permitting and construction. The sanitary sewer needs of Adelaide Landing will be served with gravity sewer designed to Ten State Standards and MPCA requirements. The proposed sewer will connect to existing gravity sewer near the intersection of 130th Street N. and TH 61, at 130th Street N. east of Flay Road N., at the west end of 135th Street N. and at the east end of 137th Street N. A peak hour flow factor of 4 per MPCA design standards will be used for sanitary sewer pipe sizing. Sanitary Waste Estimates Estimated sanitary wastewater generation from the Adelaide Landing project is approximately 88,776 gallons/day or 32.4 million gallons/ year (MGY). Usage is based on the planned building uses and the Metropolitan Council 2015 Sewer Availability Charge (SAC) Procedure Manual. The above estimates are based on the following calculations: 324 residential units at 274 gallons per unit per day = 88,776 gal/day Both of the sewer districts described above are served by the MUSA treatment facility. The wastewater flows to the Metropolitan plant located in St. Paul. This facility handles the sewage from Minneapolis, St. Paul and several suburbs. 2) If the wastewater discharge is to a subsurface sewage treatment systems (SSTS), describe the system used, the design flow, and suitability of site conditions for such a system. Wastewater discharge will not be to a subsurface sewage treatment systems (SSTS). 16