Kan. Admin. Regs. § 28-16-166 - Requirements for impermeable synthetic membrane liners in municipal or commercial wastewater treatment system lagoons
(a) The following
requirements shall apply to municipal or commercial impermeable synthetic
membrane liners:
(1) The liner shall be at
least 30 mils (0.030 inch) in thickness.
(2) The engineer designing the wastewater
lagoon shall obtain a certification from the liner manufacturer that includes
the following:
(A) Confirmation that the
specified liner is compatible for use with the proposed wastewater to be
retained or treated;
(B)
confirmation that the specified liner is resistant to UV (ultraviolet) light;
and
(C) the manufacturer's
estimated leakage, permeability, or transmissivity rate of the specified liner
expressed in units of volume per area per time (gallons per square feet per
day) for a properly installed liner. The leakage, permeability, or
transmissivity rate shall reflect the expected rate of movement of fluids
through a synthetic membrane liner when considering the properties of the liner
material, liner thickness, normally expected manufacturing defects in the liner
material, and normally expected defects associated with the seaming and
installation process.
(b) Compaction of the wastewater treatment
lagoon embankments and upper six inches of the interior lagoon bottom below the
synthetic liner shall be a minimum of 95 percent of the maximum standard
proctor density at optimum moisture to optimum moisture plus three percent. The
maximum thickness of the layers of material to be compacted shall not exceed
six inches. The moisture content range of the soils being compacted shall be
optimum moisture to optimum moisture plus three percent. The maximum size of
dirt clods in the compacted soil shall be less than one inch in diameter.
(c) The liner shall be anchored at
the top of the wastewater lagoon dike. The method of anchoring the liner shall
conform to the manufacturer's installation instructions.
(d) The liner shall be installed in
accordance with the liner manufacturer's instructions and guidance. Either the
liner shall be installed by a contractor experienced in the installation of
impermeable synthetic membrane liners, or the contractor shall provide for the
on-site supervision of the liner installation by an individual that has
experience installing liners.
(e)
The construction plans and specifications shall include provisions for the use
of a reliable seam-testing method that shall be used to verify the adequacy of
the seaming process. The methods for destructive and non-destructive seam
testing shall be specified, along with a protocol describing the number of
tests per lineal foot of field seam, the size of the destructive test specimen
required, and any other quality control provisions recommended by the liner
manufacturer. All field seams shall be subjected to non-destructive testing.
(f) The Kansas "minimum standards
of design for water pollution control facilities" shall be utilized in the
design and the establishment of construction criteria for wastewater lagoons,
unless different criteria are specified in K.A.R. 28-16-160 through K.A.R.
28-16-174. If there is any difference between the design and construction
criteria specified in K.A.R. 28-16-160 through K.A.R. 28-16-174 and either the
Kansas "minimum standards of design for water pollution control facilities" or
regulations in articles 5, 13, or 30, the design and construction criteria
specified in K.A.R. 28-16-160 through K.A.R. 28-16-174 shall control.
(g) A minimum of two feet of in
situ or compacted soil shall be provided beneath the liner or bedding material.
(h) Each applicant or permittee
shall develop and submit with the construction plans and specifications a
contingency plan, for KDHE review and consideration for approval, that outlines
procedures for pond containment and operation during periods of maintenance and
during periods of required dewatering if a liner fails or needs to be repaired.
(i)
(1) Each permittee shall immediately cease
operations or shall comply with the instructions of the secretary, if the
secretary determines that an imminent threat or the potential for an imminent
threat to public health or the environment exists due to any unsafe operating
condition. Considerations regarding an imminent threat or the potential for an
imminent threat to public health or the environment shall include the
following:
(A) The pollutant or pollutants
involved;
(B) the integrity of the
impermeable synthetic membrane liner;
(C) the depth to groundwater;
(D) the monitoring well or water supply well
data;
(E) the mobility of the
pollutant or pollutants through soil or groundwater;
(F) the potential exposure to the public; and
(G) the potential for uncontrolled
release into the environment.
(2) The permittee may resume operations if
the secretary determines that the wastewater lagoon no longer poses a risk to
public health and the environment.
Notes
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