Section 0400-40-02-.03 - ENGINEERING REPORT AND PRELIMINARY PLANS(1) Unless exempted, an engineering report and preliminary plans must be prepared and presented in accordance with the requirements of the representatives of the Commissioner. The engineering report with preliminary plans must conform to the guidelines for such reports and plans as published by the Tennessee Department of Environment and Conservation. The report shall contain all required information for adequate design evaluation of the proposed waste treatment facilities and shall include such results of waste and water analyses, treatability or pilot treatment studies and investigations that may be required by the Commissioner's representatives. Three copies of the engineering report and preliminary plans shall be submitted to a representative of the Commissioner for approval 30 days prior to the date upon which action is desired. These data will be reviewed and, if sufficient to evaluate the effect of the project, the Commissioner's representative, will confirm acceptance of the preliminary information by official site approval letter and instruct the engineer to proceed with development of final plans and specifications. If final plans and specifications have not been submitted for review within one year from the date of approval of the engineering report, the approval shall be subject to re-evaluation and may be declared null and void.(2) The engineering report and preliminary plans shall be prepared in accordance with generally accepted wastewater engineering practices. The Design Criteria published from time to time are used internally by the Division as a compilation of such practices and are available to the public. Other designs may also be used if adequately supported by calculations and actual testing data.(3) For small domestic wastewater plants, the following restrictions apply:(a) Activated sludge plants for design flows of 30,000 to 100,000 gallons per day will only be approved if all other treatment schemes have been demonstrated to be impractical due to non-economic considerations including but not limited to available space.(b) No activated sludge plants will be approved for design flows less than 30,000 gallons per day.Tenn. Comp. R. & Regs. 0400-40-02-.03
Original rule filed September 17, 2013; effective December 16, 2013. Rule originally numbered1200-04-02.Authority: T.C.A. § 69-3-101 et seq.,68-221-101 et seq. and 4-5-201 et seq.