| (4) The need for ongoing maintenance contracts shall
be determined by the permitting authority based on the review required
by §285.5(b) of this title. If the permitting authority determines
that a maintenance contract is required, the contract must meet the
requirements in §285.7 of this title.
(5) Electrical wiring for non-standard treatment systems
shall be installed according to §285.34(c)(4) of this title.
(e) Effluent quality. The following effluent criteria
shall be met by the treatment systems for those disposal systems listed
in §285.33 of this title that require secondary treatment.
Attached Graphic
(f) Other Design Considerations.
(1) Restaurant/food establishment sewage. When designing
for restaurants, food service establishments, or similar activities,
the minimum design strength value shall be 1,200 mg/l Biochemical
Oxygen Demand (BOD) after a properly sized grease trap/interceptor.
It is the responsibility of the designer to properly design a system
which reduces the wastewater strength to 140 mg/l BOD prior to disposal
unless secondary treatment levels are required.
(2) Other high-strength sewage. For situations where
sewage as defined in this chapter is expected to be a higher strength
than residential sewage, it is the responsibility of the professional
designer to justify sewage design strength estimations and properly
design a system that reduces the wastewater strength to 140 mg/l BOD
prior to disposal unless secondary treatment levels are required.
Residential sewage is sewage that has a strength of less than 300
mg/l BOD.
(3) Flow equalization. The designer should consider
whether flow-equalization will be needed for the treatment system
to function properly.
|
| Source Note: The provisions of this §285.32 adopted to be effective February 5, 1997, 22 TexReg 1114; amended to be effective January 8, 1999, 24 TexReg 139; amended to be effective June 13, 2001, 26 TexReg 4115; amended to be effective September 11, 2008, 33 TexReg 7536; amended to be effective December 27, 2012, 37 TexReg 9947 |
