Idaho Admin. Code r. 58.01.03.009

Current through September 2, 2024

Section 58.01.03.009 - OTHER COMPONENTS

01.Design Approval Required. Commercially manufactured wastewater treatment components and systems must not be used in the construction of a subsurface sewage system unless their design is approved by the Director through the recommendation of the TGC as directed in Section 004. The Department has developed recommended standards and guidance for these systems in the TGM. Approval may be limited to those locations or conditions for which achievement of standards has been demonstrated. Commercially manufactured wastewater treatment components and systems may include but are not limited to:

a. ETPSs (e.g., aerobic treatment systems);

b. Proprietary wastewater treatment systems (e.g., proprietary wastewater system technology with specified sand);

c. Proprietary wastewater system technology (e.g., gravelless distribution products); and

d. Proprietary non-discharging systems (e.g., individual wastewater incinerators, composting toilets, or vault toilets).

02.Plan and Specification Submittal. Plans and specifications for all commercially manufactured wastewater treatment components and systems will be submitted to the Director for approval. Plans and specifications will include detailed construction drawings, capacities, structural calculations, lists of materials, evidence of stability and durability, performance standards, manufacturers' installation, operation and maintenance instructions, an installation inspection checklist, a list of all prior approvals from other states including any review or compliance related issues, and any other relevant information as requested by the Director.

03.ETPSs.

a. In addition to the items listed in Subsection 009.02, ETPS plan and specification submittals must include:

i. A plan for training and certifying system installers and service providers under Section 006;

ii. An operation and maintenance manual which contains all operation and maintenance specified by the design engineer or manufacturer and the Department; and

iii. A quality assurance project plan which documents how sampling will occur if sampling is required by the Director for product approval and continued monitoring.

b. Manufacturers seeking approval of these systems for reducing total suspended solids (TSS) and carbonaceous biological oxygen demand 5-day (CBOD5) when used with residential strength wastewater must submit NSF/ANSI 40: Residential Onsite Systems approvals, reports, and associated data or equivalent third-party standards.

c. Manufacturers seeking approval for reduction of total nitrogen (TN) must submit NSF/ANSI 245: Nitrogen Reduction approvals, reports, and associated data or equivalent third-party standards.

d. Design and installation of these systems must meet the following:

i. The effluent is discharged to a drainfield meeting the requirements of a standard drainfield as directed in Section 008 or a Director-approved alternative.

ii. Separation between the bottom of the trench or bed to limiting layers protects ground water quality if the distance deviates from the table in Subsection 008.02.c.

iii. The distribution laterals within the trench or bed meet the requirements of Section 008 or a Director-approved alternative.

iv. Tank access lids are to grade or above with a sealed riser and fitted with a secured lid for monitoring and maintenance.

v. If vertical separation distances are reduced from the distances defined in the table in Subsection 008.02.c., a sampling port has to be installed to provide a representative sample of the effluent from the system.

e. Within thirty (30) days of completing installation of an ETPS, the property owner shall provide certification to the health district from a representative approved by the manufacturer that the system has been installed and will operate in accordance with the manufacturer's recommendations. The health district shall not finalize the subsurface sewage disposal permit until the certification of proper installation and operation is received and includes information on the manufacturer, product, model number, and serial number of the ETPS installed.

f. Property owners with an ETPS installed on their property must have all operation, maintenance, and monitoring requirements specified in the permit completed by June 30th each year by a certified service provider in accordance with Section 006, including effluent monitoring if required by the permit. The certified service provider who completed operation, maintenance, and monitoring for the system as specified in the TGM must submit an annual report by July 31st of each calendar year demonstrating that the system is working as designed.

g. Permit requirements for ETPSs transfer with ownership changes. Before transferring ownership of a property with an ETPS, the system owner must notify all transferees of the ETPS operation, maintenance, and monitoring requirements. Within thirty (30) days of transferring ownership of a property with an ETPS, the transferee must notify the health district of the new owner of the property.

04.Proprietary Wastewater Treatment Systems.

a. Manufacturers seeking approval for these systems for reducing total suspended solids (TSS) and carbonaceous biological oxygen demand 5-day (CBOD5) when used with residential strength wastewater must submit NSF/ANSI 40: Residential Onsite Systems approvals, reports, and associated data or equivalent third-party standards.

b. Manufacturers seeking approval for reduction of total nitrogen (TN) must submit NSF/ANSI 245: Nitrogen Reduction approvals, reports, and associated data or equivalent third-party standards.

c. Proprietary wastewater system media utilized with a proprietary wastewater treatment system must:

i. Be constructed or manufactured from materials that are non-decaying and non-deteriorating and do not leach unacceptable chemicals when exposed to sewage and the subsurface soil environment;

ii. Support the distribution pipe and provide suitable effluent distribution and infiltration rate to the absorption area at the soil interface; and

iii. Maintain the integrity of the trench or bed. The material used, by its nature and manufacturer-prescribed installation procedure, needs to withstand the physical forces of the soil sidewalls, soil backfill, and weight of equipment used in the backfilling.

d. Design and installation of these systems must meet the following:

i. The effluent is discharged to a drainfield that meets the required effective soil depth for standard drainfields as directed in Section 008.

ii. Separation between the bottom of the manufactured medium sand component of the proprietary wastewater treatment system to limiting layers protects ground water quality if the distance deviates from the table in Subsection 008.02.c.

iii. The distribution laterals within the trench or bed meet the requirements of Section 008 or a Director-approved alternative.

iv. Drainfields sized based on the manufacturer's recommended minimum sizing requirement or the maximum daily flow of effluent divided by the hydraulic application rate for the applicable soil design subgroup, whichever is greater.

v. Pressure distribution, when used with a proprietary wastewater treatment product, is designed by an Idaho licensed professional engineer.

e. A proprietary wastewater treatment system may be required to follow the same operation, maintenance, monitoring, and reporting requirements described in Subsection 009.03.f. due to factors such as product complexity and/or site specific constituent reduction requirements.

f. Permit requirements for these systems transfer with ownership changes. Before transferring ownership of a property with this system, the system owner must notify all transferees of the system operation, maintenance, and monitoring requirements. Within thirty (30) days of transferring ownership of a property with the system, the transferee must notify the health district of the new owner of the property.

05.Effect of Design Approval. The Director may condition a design approval by specifying circumstances under which the component must be installed, used, operated, maintained, or monitored.

a. The Director shall specify the complex alternative systems that must undergo professionally managed operation, maintenance, service, or effluent testing.

b. Manufacturers shall provide training to a reasonable number of service providers to perform required operation, maintenance, or monitoring as specified by the Director.

c. Manufacturers may enter into agreements with certified service providers trained in their technology but shall not limit the service providers from being trained in the technology of other manufacturers.

06.Notice of Design Disapproval. If the Director is satisfied that the component described in the submittal may not be in compliance with or may not consistently function in compliance with these rules, or that the manufacturer of the proposed system failed to comply with Subsection 009.03, the Director will disapprove the design as submitted. The manufacturer or distributor submitting the design for approval will be notified in writing of the disapproval and the reason for that action.

07.Amendments or Revocations. The Director may amend or revoke any permit or system approved by the Department if:

a. Approval was based on false or misleading information;

b. The material, technology, or design no longer achieves performance standards for which it was approved or does not meet the intent of the rules; or

c. The manufacturer is not meeting the requirements of these rules or conditions of the approval.

Idaho Admin. Code r. 58.01.03.009

Effective March 31, 2022