(A)   Drip distribution systems. Drip distribution systems shall be designed, installed, operated and maintained in accordance with the corresponding current manufacturer’s specification manual, with the exception that the requirements of this section shall apply.
      (1)   Pretreatment. Pretreatment shall be by process designed to meet NSF ANSI Standard 40 for wastewater treatment systems.
      (2)   Pretreatment capacity. The daily design flow, plus the backwash water from the system, shall not exceed the treatment capacity of the pre-treatment device if backwash water discharges to the pre-treatment device.
      (3)   Lift station. The lift station shall be sized in accordance with Appendix C.
      (4)   Soil loading rate. The soil loading rate (in gallons/day/square foot) shall be based upon the least permeable soil encountered within 24 inches below the proposed depth of the drip distribution tubing. The soil loading rate shall be no more than 75% of the loading rate reported on the soil evaluation in accordance with the requirements of Table B.2 (Appendix B).
      (5)   Drip tubing requirements. Drip tubing installation and configuration shall be as follows:
         (a)   The drip irrigation system shall be configured so that the length of the soil treatment area is at least two times its width.
         (b)   If required, plowing shall be conducted in accordance with the requirements of § 171.142.
         (c)   All piping and components shall be installed to allow wastewater to drain back to the pretreatment tank or dosing tank.
         (d)   To allow for drain back, a check valve shall not be installed in the supply and return lines.
         (e)   An audio-visual alarm shall be provided to warn of a high water condition in the dosing tank.
            1.   The alarm shall be on a separate dedicated electrical circuit.
            2.   If an alarm is being used by another component of the onsite wastewater system, is compliant with this section, and is able to connect additional devices, it may be used without the need for an additional alarm.
      (6)   System management. System management notification by the manufacturer and installation contractor shall be as follows:
         (a)   The manufacturer shall provide specifications for the management of all components within the drip distribution system.
         (b)   The manufacturer shall provide a management plan to ensure that maintenance is conducted as required to achieve and maintain proper system function.
         (c)   The following information shall be provided by the installation contractor or manufacturer to the owner of the system:
            1.   An operation manual.
            2.   A management plan for the drip irrigation system.
            3.   The manufacturer of the components and a description of the function of the components.
            4.   The service contract information.
            5.   A trouble-shooting/repair guide.
            6.   A list of safety concerns.
            7.   Manufacturer’s specification sheets for all electrical and mechanical components.
(Ord. [Bd of Health Ord., Art. V], passed 11-12-1996; Ord. [Bd of Health Ord., Art. V], passed 11-12-2013)