The Engineering Report

(1) At a minimum, the Engineering Report shall contain a detailed description of the treatment works, including the wastewater treatment technology to be employed, the concentration of pollutants in the reclaimed water that is to be produced by the treatment works, and the proposed classification of the reclaimed water. The description shall include information on the sources of water to be treated, flows and loads, number and size of unit processes, appurtenant facilities and a preliminary layout. The Engineering Report shall also provide documentation, including without limitation, the results of any pilot studies that show that the proposed technology will meet the effluent limits applicable to the proposed classification. The Engineering Report shall include a monitoring plan and a schematic that identifies the proposed locations for monitoring to assess compliance with the applicable requirements. (2) At a minimum, the Engineering Report shall document that: (a) The wastewater treatment facilities have been designed in accordance with the latest edition of TR-16: Guidelines for the Design of Wastewater Treatment Facilities prepared by the New England Interstate Water Pollution Control Commission and other applicable Department guidelines. (b) To meet the EPA Class I Reliability Standards, the wastewater treatment facilities have been designed to include the following components: 1. Two independent and separate sources of power, with the backup source sufficient to operate all vital components during peak flow conditions, together with critical lighting and ventilation; 2. Unit redundancy; 3. Additional storage or bypass to a discharge site as required by the Department pursuant to 314 CMR 20.12(3) and 314 CMR 20.12(5); and 4. Sufficient inventory of spare equipment and parts to minimize the time period that treatment plant operations are off-line. (c) The wastewater treatment facilities have been designed in accordance with the requirements of the Massachusetts Uniform State Plumbing Code, 248 CMR 10.00. (3) Except as otherwise provided in 314 CMR 20.12(4) and 314 CMR 20.12(5), a new or expanded reclaimed water system shall be designed and constructed so that the average daily flow may be discharged to a reserve soil absorption system or to a wastewater collection system for transport to other treatment or disposal facilities. Except as otherwise provided in 314 CMR 20.12(4) and 314 CMR 20.12(5), the Engineering Report shall document compliance with this requirement. (4) An applicant may propose, and the Department may permit, a new reclaimed water system with a soil absorption system that does not meet the requirements of 314 CMR 20.12(3), provided the Engineering Report contains sufficient information to demonstrate to the Department's satisfaction that the proposed use of reclaimed water will benefit the overall water balance in a watershed or subwatershed without creating an unreasonable risk to the public health or the environment. (5) An applicant may propose and the Department may permit an expansion of an existing reclaimed water system that includes a soil absorption system that does not meet the requirements of 314 CMR 20.12(3) provided the Engineering Report contains sufficient information to demonstrate to the satisfaction of the Department that the applicant exercised best efforts to provide a soil absorption system that meets the requirements of 314 CMR 20.12(3) and that use of the reclaimed water system with the proposed soil absorption system will not create an unreasonable risk to the public health or the environment. (6) If the proposed reclaimed water system is a POTW, the Engineering Report shall document that the public owned treatment works has a pretreatment program that: (a) meets the requirements of the Federal Act, M.G.L. c. 21, §§ 26 through 53, including, without limitation, 314 CMR 12.00; and (b) is adequate to ensure that the reclaimed water produced by the POTW meets the effluent limits associated with the proposed use and classification of the reclaimed water.