02 - MPCA - Spray Irrigation Fields

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7077.0272 FACILITIES PLAN FOR WASTEWATER TREATMENT SYSTEMS Subpart 1. In general. Facilities plans for wastewater treatment systems must be prepared and signed by a professional engineer registered in Minnesota, provided that facilities plans for individual sewage treatment systems designed to treat 5,000 gallons or less of wastewater per day must be prepared and signed by either a professional engineer registered in Minnesota or an individual sewage treatment system designer authorized under agency rules to prepare such plans. Subp. 1a. Approval by commissioner. Facilities plans must be submitted to the commissioner for review and approval. Approval shall be based on the commissioner's determination of the adequacy of the facility plan to address the requirements of this part. If the municipality is proposing to change the selected treatment method or any other major element of a previously approved facilities plan or storm water project plan, the municipality must receive the commissioner's approval of a facilities plan addendum. Subp. 2. Facilities plan contents. A facilities plan must address items A to E in the amount of detail that is appropriate to describe a project accurately. A. A complete description and evaluation of the existing wastewater treatment system and problems that need correction. This evaluation must consider the age, condition, design capacity, and treatment capabilities of each treatment unit, the system's ability to meet current or proposed permit requirements, and the location, frequency, and quantity of any bypasses. For existing individual sewage treatment systems, a survey must also be prepared which identifies whether or not each individual sewage treatment system in the project service area conforms to the requirements under chapter 7080. B. Data describing existing residential wastewater flows and loadings, and existing nonresidential wastewater flows and loadings. The existing wastewater flow and loading data must be reported on a form provided by the agency. C. Data describing future residential and nonresidential wastewater flows and loadings within the next 20-year period based on projected residential growth, projected nonresidential growth, and signed letters of intent from significant industrial users. The future wastewater flow and loading data must be reported on a form provided by the agency. D. An analysis of all feasible treatment alternatives that are capable of meeting the applicable effluent, water quality, and public health requirements for 20 years. Where the project area is currently served by individual sewage treatment systems, the analysis of feasible treatment alternatives must be submitted on a form prescribed by the commissioner. The discussion of the considered alternatives must include: (1) a comparison of the cost-effectiveness of the alternatives considered. The comparison must include a detailed breakdown of the present worth of all capital costs, annual operation and maintenance costs, equipment replacement costs, and salvage values. If excessive levels of infiltration or inflow exist, the comparison of treatment alternatives must include a comparison of the cost of eliminating excessive infiltration or inflow with the cost of transportation and treatment of the infiltration or inflow; (2) a site assessment of the existing soil and groundwater conditions conducted and signed by a professional engineer. For individual sewage treatment systems designed to treat less than 5,000 gallons per day of wastewater, a site assessment must be done by either a professional engineer or an individual sewage treatment system designer authorized under agency rules to make the assessment; (3)an evaluation of the impact of the alternatives on all existing wastewater treatment systems, including sewers and lift stations; Page 1 of 3 CADocuments and Settings\Sandy\Local Settings\Temporary Intemet Files\OLK23\MN Rule 7077 0272-Facilities Plan Requirements.doc