La. Admin. Code tit. 51 § XIII-731

Current through Register Vol. 50, No. 11, November 20, 2024

Section XIII-731 - Effluent Reduction System Requirements for Treated Wastewater [formerly Section IX of Appendix A]

A. [Formerly paragraph A:9.1 of Appendix A] Disinfectants. Where effluent discharges are required to be disinfected, and chlorine is used as the disinfectant, a chlorine contact chamber is required. Calcium hypochlorite, labeled for wastewater disinfection, shall be added in sufficient concentrations to maintain a minimum residual of 0.5 ppm total chlorine in the effluent. In order to achieve the required chlorine contact time, a baffled chlorine contact chamber [§1501. B 11 (Figures 11, 12, 13)] designed to meet the needs for each system with the specified liquid holding capacity shall be used as follows.

Disinfectant Chamber Minimum Liquid Capacity
Treatment Capacity of Sewerage System	Contact Chamber Liquid Capacity
500 GPD or less	30 gallons
501-750 GPD	45 gallons
751-1000 GPD	60 gallons
1001-1500 GPD	90 gallons

1. Any other disinfectant proposed for use should provide an equivalent level of disinfection.

B. [Formerly paragraph A:9.2 of Appendix A] Pumping Stations. Pumping station, when required, must be constructed of approved materials, and must comply with the applicable provisions of this Code.

C. [Formerly paragraph A:9.3 of Appendix A] Effluent Reduction Systems. Individual sewage systems, with a capacity up to and including 1500 gpd, that produce a treated, off-site effluent, shall include an effluent reducer as part of the overall system [§1501. B 12 (Figure 14)].

D. [Formerly paragraph A:9.4 of Appendix A] Special situations may arise where an individual on-site wastewater treatment system is allowed as per §511. B of this Code, but it is physically impossible to install the required size of the effluent reduction system or the effluent reduction system itself due to lot size or when a limited use sewerage system is installed in a marsh/swamp area or located over water. The size of the effluent reduction system can be reduced to the maximum amount the lot can accommodate or the installation waived with the authorization of the sanitarian parish manager. Written notification of such authorization must be submitted to the sanitarian regional director and a copy attached to the "Application for Permit for Installation of On-Site Wastewater Disposal System" (LHS-47).

E. [Formerly paragraph A:9.5 of Appendix A] All effluent reduction systems shall be installed by a licensed installer. Existing field lines can not be used as the effluent reduction system.

F. [Formerly paragraph A:9.6 of Appendix A] The size of the effluent reduction system installed has to correspond with the recommended size of the sewerage system. For example if a 750 GPD plant is required on the "Application For Permit For Installation of On-Site Wastewater Disposal System" (LHS-47), the applicant may install a 1000 GPD plant, however the size of the effluent reduction system only has to correspond to the minimum size required for a 750 GPD plant.

G. [Formerly paragraph A:9.7 of Appendix A] The sample port for a sewerage system must be installed immediately downstream of the system and in accordance with the appropriate edition and Section of NSF Standard 40, as currently promulgated, as well as the applicable provisions of this Code.

La. Admin. Code tit. 51, § XIII-731

Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 28:1356 (June 2002).

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(6), R.S. 40:5(9)(20), and R.S. 40:1154(A).