Louisiana Administrative Code › Title 51 - PUBLIC HEALTH-SANITARY CODE › Part XIII - Sewage Disposal › Chapter 7 - Individual Sewerage Systems [formerly Chapter 13 Subpart D] › Subchapter B - Design and Construction Regulations [formerly Chapter 13 Appendix A] › Section XIII-729 - Pumping Stations [formerly Section VIII of Appendix A]

Current through Register Vol. 50, No. 6, June 20, 2024
A. [Formerly paragraph A:8.1 of Appendix A]
				  When the elevation of a site prevents the use of gravity flow to convey liquid
				  from one location to another, a pumping station [§1501. B 19 (Figure 22)],
				  consisting of a holding tank, pump(s), piping, electrical controls, and other
				  equipment as necessary, must be provided.
B. [Formerly paragraph A:8.2 of Appendix A ]
				  Many manufacturers build pumps, and in some cases complete pump stations, for
				  the special purpose of handling wastewater, either raw, partially treated, or
				  treated. Such specially built pump stations may be used, provided all other
				  code requirements are met.
C.
				  [Formerly paragraph A:8.3 of Appendix A] Pumps utilized in pump stations must
				  be suitable for the specific application proposed. Pumps must be provided with
				  impellers and casings constructed of corrosion resistant materials.
D. [Formerly paragraph A:8.4 of Appendix A]
				  Pumps shall be provided to accommodate required elevation and hydraulic heads
				  and peak flow rates, and be cycled in a manner not to be unduly disruptive to
				  any downstream system.
E. [Formerly
				  paragraph A:8.5 of Appendix A] The pump station holding tank must be
				  constructed of materials suitable for septic tank use in accordance with §715.
				  I and O of this Subchapter. Additionally, molded fiberglass, reinforced
				  polyester (FRP) resin tanks having a minimum wall thickness of 1/4" are also
				  acceptable.
F. [Formerly paragraph
				  A:8.6 of Appendix A] Holding tanks shall be constructed and installed with
				  suitable foundations to prevent settling due to soil conditions or floating of
				  the tank due to high water table elevations.
G. [Formerly paragraph A:8.7 of Appendix A]
				  Pump station holding tanks shall be constructed and installed so as to be
				  watertight. All wall seams, seams between walls and tank floor, and openings
				  such as for pipes and wiring shall be sealed watertight. Additionally, all
				  holding tank covers and access openings shall be attached in watertight manner
				  by gaskets or grooves and should be sufficiently above the ground, but in no
				  case less than 3 inches above ground, to prevent the entrance of surface runoff
				  water.
H. [Formerly paragraph A:8.8
				  of Appendix A] The holding tank shall have a minimum diameter or dimension of
				  24 inches. The cover shall be equipped with an access opening of sufficient
				  size to allow for pump maintenance and removal, but in no case less than 12
				  inches in diameter or dimension.
I.
				  [Formerly paragraph A:8.9 of Appendix A] Pumps shall be installed in such a
				  manner as to allow for removal and/or maintenance of the pump without
				  necessitating entry into the holding tank by maintenance personnel. Pumps shall
				  be provided with suitable means of quick, convenient disconnection from
				  discharge piping and electrical wiring. Provisions must be made for lifting the
				  pump from the holding tank with minimal exposure to the liquid in the
				  tank.
J. [Formerly paragraph A:8.10
				  of Appendix A] Suitable level control devices for use in the harsh, corrosive
				  environment encountered, shall be provided to control pump operation. The level
				  controls shall provide for the following functions: "pump off," "pump on," and
				  "high water alarm."
1. [Formerly paragraph
				  A:8.10-2 of Appendix A] All materials utilized within the holding tank, whether
				  above or below water level, shall be constructed of materials resistant to
				  corrosion from the hostile operating environment of the tank.
2. [Formerly paragraph A:8.10-3 of Appendix
				  A] An audible and visual "high water alarm" shall be provided and shall be
				  located in a conspicuous location. A reset button should be provided for the
				  audible signal in a convenient location so that relief can be easily
				  obtained.
3. [Formerly paragraph
				  A:8.10-4 of Appendix A] The "pump off" level shall be set at the minimum
				  elevation as recommended by the specific pump's manufacturer.
4. [Formerly paragraph A:8.10-5 of Appendix
				  A] The "pump on" level shall be set at elevation to provide a minimum working
				  volume of 10 percent of the average daily design flow of the treatment
				  system.
5. [Formerly paragraph
				  A:8.10-6 of Appendix A] The "high water alarm" level shall be set so as to
				  provide for a net storage volume between the "pump on" level and the "high
				  water alarm level" of 10 percent of the average daily design flow of the
				  treatment system.
6. [Formerly
				  paragraph A:8.10-7 of Appendix A] A reserve volume may be provided between the
				  "high water level" and the invert of the inlet pipe to the holding tank, if so
				  desired.