16 Tex. Admin. Code § 4.151 - [Effective 7/1/2025] Design and Construction of Permitted Pits
(a) Application.
(1) Unless otherwise provided by permit, all
permitted pits shall comply with the general construction requirements
applicable to authorized pits in Division 3 of this subchapter (relating to
Operations Authorized by Rule).
(2) In addition to the information required
by §
4.128 of this title (relating to
Design and Construction), the facility diagram submitted with the application
shall include the following information:
(A)
the maximum length, width, and depth of the pit in feet;
(B) the maximum depth of the pit below grade
in feet;
(C) the maximum and
minimum height of walls or dikes above grade in feet;
(D) the dimensions of the dikes including the
width at the base, height, and slope;
(E) the maximum volume of the pit in barrels
and cubic yards;
(F) the maximum
volume of the pit minus the volume to maintain the required freeboard in
barrels and cubic yards;
(G) the
volume of the pit below natural grade in barrels and cubic yards;
(H) information on the pit liner type and
thickness, installation methods, and manufacturer's specification sheets;
(I) a plan view drawing of each
pit, including all dimensions, and any trenches or structures used to separate
and convey contact and non-contact stormwater;
(J) two perpendicular, sectional views of
each pit showing the bottom, sides, dikes, and natural grade, including all
dimensions; and
(K) the surface
area and action leakage rate calculation for any pit with a leakage detection
system, that is prepared and sealed by a professional engineer licensed in
Texas. The action leakage rate calculations shall include:
(i) all assumptions and dimensions used;
(ii) the size of the pump and
pipes that will be used in the leakage detection system; and
(iii) calculations demonstrating that the
system is designed to sufficiently withdraw and manage the expected leakage
rate.
(3)
The permittee shall provide any other information necessary to address the
operating requirements detailed in subsection (b) of this section.
(b) Operating requirements.
(1) Signage. The permittee shall post a sign
at each permitted pit. The sign shall show the permit number in letters and
numerals at least three inches in height.
(2) Freeboard. Unless otherwise required by
permit or rule, the permittee shall maintain all pits such that each pit
maintains a freeboard of at least two feet plus the capacity to contain the
volume of precipitation from a 25-year, 24-hour rainfall event.
(3) Liners.
(A) Equipment, machinery, waste, or other
materials that could reasonably be expected to puncture, tear, or otherwise
compromise the integrity of the liner shall not be used or placed in lined
pits.
(B) Unless the permit
specifically provides otherwise, the liner for any permitted pit required to be
lined shall comply with the general requirements for lining in Division 3 of
this subchapter (relating to Operations Authorized by Rule), except that the
thickness of a high-density polyethylene liner in a permitted pit shall be a
minimum of 60 mil and, for any other type of synthetic liner, a minimum of 30
mil.
(C) A brine pit permitted
under this subchapter shall be constructed with a primary and secondary liner
and a leakage detection system.
(4) Additional requirements as determined by
Director. Any pit permits issued pursuant to this subchapter may contain
additional requirements concerning design and construction including
requirements relating to construction materials, dike or berm design, liner
material, liner thickness, procedures for installing liners, overflow warning
devices, leak detection devices, monitor wells, and fences that the Director
determines are necessary to prevent pollution.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
No prior version found.