Or. Admin. Code § 340-071-0340 - Holding Tanks
(1) Criteria for
approval. Except as section (5) of this rule provides, installing a holding
tank system requires a construction-installation or WPCF permit. A
construction-installation permit may be issued for sites that meet all the
following conditions.
(a) Permanent use.
(A) The site cannot be approved for
installation of a standard subsurface system.
(B) No community or area-wide sewerage system
is available or expected to be available within five years.
(C) The tank is intended to serve a small
industrial or commercial building or an occasional use facility such as a
county fair or a rodeo.
(D) Unless
DEQ allows otherwise, the projected daily sewage flow is not more than 200
gallons.
(E) Setbacks required for
septic tanks can be met.
(b) Temporary use: A holding tank may be
installed in an area under the control of a city or other legal entity
authorized to construct, operate, and maintain a community or area-wide
sewerage system if:
(A) The application for
permit includes a copy of a legal commitment from the legal entity to extend a
community or area-wide sewerage system meeting the requirements of this
division to the property covered by the application within five years from the
date of the application; and
(B)
The proposed holding tank complies with other applicable requirements in OAR
chapter 340, divisions 071 and 073.
(2) Operations and maintenance. At all times
the holding tank is being used, the tank's owner must maintain a service
contract with a sewage disposal service licensed under OAR
340-071-0600 to provide for
regularly inspecting and pumping the holding tank.
(3) Design and construction requirements.
Except as provided in section (5) of this rule, holding tanks must comply with
the following requirements:
(a) Plans and
specifications for each holding tank proposed to be installed must be submitted
to the agent for review and approval.
(b) Each tank must:
(A) Have a minimum liquid capacity of 1,500
gallons;
(B) Comply with tank
standards in OAR 340-073-0025;
(C) Be located and designed to facilitate
removal of contents by pumping
(D)
Be equipped with both an audible and a visual alarm placed in locations
acceptable to the agent to indicate when the tank is 75 percent full. Only the
audible alarm may be user cancelable;
(E) Have no overflow vent at an elevation
lower than the overflow level of the lowest fixture served; and
(F) Be designed for antibuoyancy if test hole
examination or other observations indicate seasonally high groundwater may
float the tank when empty.
(4) Special requirements. The application for
a holding tank permit must include:
(a) A
copy of a contract with a licensed sewage disposal service that requires the
tank to be pumped periodically at regular intervals or as needed and the
contents treated in a manner and at a facility the agent approves; and
(b) Evidence that the owner or
operator of the proposed treatment facility will accept the pumpings for
treatment.
(5) Portable
holding tanks may be temporarily placed at sites having limited duration events
such as county fairs or construction projects or at temporary restaurants if
the following requirements are met:
(a) The
tanks must be owned and serviced by a licensed sewage disposal service with
sewage pumping equipment having a 550-gallon or larger tank and meeting all
other requirements in OAR
340-071-0600(11).
(b) Tank placement and use must comply with
all local planning, building, and health requirements.
(c) Only domestic sewage may be discharged
into the tank.
(d) The tank must be
maintained in a sanitary manner to prevent a health hazard or nuisance.
(e) The tank must not be buried.
(f) A person may not use the tank
to serve a dwelling, recreation vehicle, or any other structure having sleeping
accommodations, except that a portable holding tank may be used temporarily to
serve a contractor's job shack or night watchman's trailer.
(g) The tank must meet the following
standards:
(A) The tank must be watertight
with no overflow vent lower than the overflow level of the lowest fixture
served.
(B) Tank capacity may not
exceed 1,000 gallons unless otherwise authorized by the agent.
(C) The tank must be structurally sound and
made of durable, noncorrosive materials.
(D) The tank must be designed and constructed
to provide a secure, watertight connection of the building sewer pipe.
(E) The tank must be marked with
the name and phone number of the licensed sewage disposal service responsible
for maintaining the tank.
Notes
Statutory/Other Authority: ORS 454.625 & 468.020
Statutes/Other Implemented: ORS 454.615 & 454.775
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