(a) Graywater reuse systems and combined reuse systems
are authorized in Chapter 210, Subchapter F of this title (relating
to Use of Graywater and Alternative Onsite Water) without a permit,
without the submission of planning materials, and without meeting
the requirements and conditions of this section. However, a homeowner
requesting an on-site sewage facility (OSSF) disposal system smaller
than required in §285.33 of this title (relating to Criteria
for Effluent Disposal Systems) must obtain a permit and meet the requirements
and conditions of this section. Additionally, the potential reduction
of the OSSF disposal system in this section only applies to single
family residence with a graywater reuse or a combined reuse system.
OSSF disposal systems for non-single family residences with a graywater
reuse or a combined reuse system shall not have an OSSF disposal system
reduction.
(b) Effluent disposal system sizing. If the graywater
reuse system or combined reuse system serving the single family residence
is in compliance with Chapter 210, Subchapter F of this title, the
effluent disposal system required in §285.33 of this title may
be reduced in accordance with Table I in Figure: 30 TAC §285.81(b)
of this section.
Attached Graphic
(c) Verification of plumbing entering the OSSF. A licensed
master plumber shall evaluate and document, after the plumbing is
installed, which sewage sources will be entering the OSSF. The documentation
must be provided to the OSSF permitting authority.
(d) Increased wastewater strength. When graywater is
removed from the total sewage stream, the remaining sewage stream
entering the OSSF will have a higher organic strength. The resulting
increase in sewage strength shall be determined in accordance with
Table II in Figure: 30 TAC §285.81(d) of this section.
Attached Graphic
(e) If the effluent disposal system does not require
secondary treatment, either a professional sanitarian or a professional
engineer shall demonstrate with effective treatment design and supporting
calculations that the proposed treatment system will reduce the effluent
quality down to 140 milligrams per liter five-day biochemical oxygen
demand (mg/l BOD5 ) prior to entering
the effluent disposal system.
(f) If the effluent disposal system requires secondary
treatment, then a professional engineer shall demonstrate with effective
treatment design and supporting calculations that the effluent quality
meets the levels outlined in §285.32(e) of this title (relating
to Criteria for Sewage Treatment Systems).
(g) If the effluent disposal system is reduced based
on the presence of a graywater reuse system or a combined reuse system,
a reserve area equivalent to the reduced area shall be shown to be
available for future construction of a disposal field should the graywater
reuse system or combined reuse system be abandoned at a later date.
The reserve area shall meet the setbacks required by §285.91(10)
of this title (relating to Tables) and shall not be used for any surface
improvements.
(h) Graywater or alternative onsite water, as defined
in Chapter 210, Subchapter F of this title, shall not be applied to
the surface of a reduced effluent disposal system.
(i) The reduced effluent disposal system is not sized
to accommodate graywater. Therefore, there shall not be any physical
connection between the graywater reuse system or the combined reuse
system and any part of the OSSF without authorization from the OSSF
permitting authority.
(j) In addition to the requirements outlined in Chapter
210, Subchapter F of this title, a graywater reuse system or a combined
reuse system, used in association with a reduced effluent disposal
system under this section, must have a storage tank capable of storing
a volume of three days of graywater. The storage is necessary to prevent
application of graywater during periods when the landscape is saturated.
(k) Before a license to operate is issued for a reduced
effluent disposal system allowed under this section, an affidavit
shall be properly filed and recorded in the deed records of the county.
The affidavit must include the owner's full name, the legal description
of the property, a statement that the permit for the OSSF is transferred
to the new owner upon transfer of the property, a statement that the
effluent disposal system is reduced due to the presence of a graywater
reuse system or a combined reuse system, a statement that the specified
reserve area shall not contain surface improvements, and a statement
that the graywater reuse system or combined reuse system cannot be
connected to the OSSF without obtaining a permit from the OSSF permitting
authority.
(l) If the property owner of a graywater reuse system
or a combined reuse system on a property served by a reduced effluent
disposal system is convicted under or found in violation of any statute
related to graywater or public health nuisance, and the system is
not properly repaired in a timely manner, the OSSF permitting authority
may require the graywater to be connected to the OSSF. If the OSSF
permitting authority requires the graywater to be connected to the
OSSF, the effluent disposal system must be expanded to accommodate
all the flow required in §285.91(3) of this title, and the expansion
must be permitted by the OSSF permitting authority.
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Source Note: The provisions of this §285.81 adopted to be effective June 13, 2001, 26 TexReg 4115; amended to be effective January 6, 2005, 29 TexReg 12204; amended to be effective December 29, 2016, 41 TexReg 10378 |