Current through August 31, 2023
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: (3-31-22)
a. ETPSs (e.g., aerobic treatment systems);
(3-31-22)
b. Proprietary wastewater
treatment systems (e.g., proprietary wastewater system technology with
specified sand); (3-31-22)
c.
Proprietary wastewater system technology (e.g., gravelless distribution
products); and (3-31-22)
d.
Proprietary non-discharging systems (e.g., individual wastewater incinerators,
composting toilets, or vault toilets). (3-31-22)
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. (3-31-22)
03.
ETPSs. (3-31-22)
a. In addition
to the items listed in Subsection
009.02, ETPS plan and
specification submittals must include: (3-31-22)
i. A plan for training and certifying system
installers and service providers under Section
006; (3-31-22)
ii. An operation and maintenance manual which
contains all operation and maintenance specified by the design engineer or
manufacturer and the Department; and (3-31-22)
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. (3-31-22)
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. (3-31-22)
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.
(3-31-22)
d. Design and
installation of these systems must meet the following: (3-31-22)
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. (3-31-22)
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. (3-31-22)
iii. The distribution laterals within the
trench or bed meet the requirements of Section
008 or a Director-approved
alternative. (3-31-22)
iv. Tank
access lids are to grade or above with a sealed riser and fitted with a secured
lid for monitoring and maintenance. (3-31-22)
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. (3-31-22)
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. (3-31-22)
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. (3-31-22)
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.
(3-31-22)
04.
Proprietary Wastewater Treatment Systems. (3-31-22)
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. (3-31-22)
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.
(3-31-22)
c. Proprietary wastewater
system media utilized with a proprietary wastewater treatment system must:
(3-31-22)
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; (3-31-22)
ii. Support
the distribution pipe and provide suitable effluent distribution and
infiltration rate to the absorption area at the soil interface; and
(3-31-22)
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. (3-31-22)
d. Design and installation of these systems
must meet the following: (3-31-22)
i. The
effluent is discharged to a drainfield that meets the required effective soil
depth for standard drainfields as directed in Section
008. (3-31-22)
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. (3-31-22)
iii. The distribution laterals within the
trench or bed meet the requirements of Section
008 or a Director-approved
alternative. (3-31-22)
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.
(3-31-22)
v. Pressure distribution,
when used with a proprietary wastewater treatment product, is designed by an
Idaho licensed professional engineer. (3-31-22)
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.
(3-31-22)
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. (3-31-22)
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. (3-31-22)
a. The Director shall specify the complex
alternative systems that must undergo professionally managed operation,
maintenance, service, or effluent testing. (3-31-22)
b. Manufacturers shall provide training to a
reasonable number of service providers to perform required operation,
maintenance, or monitoring as specified by the Director. (3-31-22)
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. (3-31-22)
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. (3-31-22)
07.
Amendments or Revocations.
The Director may amend or revoke any permit or system approved by the
Department if: (3-31-22)
a. Approval was
based on false or misleading information; (3-31-22)
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 (3-31-22)
c. The manufacturer is not meeting the
requirements of these rules or conditions of the approval.
(3-31-22)
