Louisiana Administrative Code
Title 33 - ENVIRONMENTAL QUALITY
Part IX - Water Quality
Subpart 1 - Water Pollution Control
Chapter 7 - Effluent Standards
Section IX-711 - Secondary Treatment for Sanitary Sewage
Current through Register Vol. 50, No. 9, September 20, 2024
A. Applicability. This Section provides information on the level of effluent quality attainable through the application of secondary or equivalent treatment.
B. Definitions. The following definitions are applicable to terms used in this Section. Definitions of other terms and meanings of abbreviations are set forth in LAC 33:IX.107.
BOD5- the five day measure of the pollutant parameter biochemical oxygen demand.
CBOD5-the five day measure of the pollutant parameter carbonaceous biochemical oxygen demand.
C. Secondary Treatment for Sanitary Sewage. The following paragraphs describe the minimum level of effluent quality attainable by secondary treatment in terms of BOD5, TSS, and pH.
D. Treatment Equivalent to Secondary Treatment. The following levels of treatment may be considered equivalent to secondary treatment.
|
Concentration in mg/L |
||||
|
Principle Treatment Process |
30-day average |
7-day average |
||
|
BOD |
TSS |
BOD |
TSS |
|
|
1. Trickling Filter |
||||
|
a. New |
30 |
30 |
45 |
45 |
|
b. Existing minor |
45 |
45 |
65 |
65 |
|
c. Existing major |
30-45* |
30-45* |
45-65 |
45-65 |
|
2. Oxidation Pond |
||||
|
a. New |
30 |
90 |
45 |
135 |
|
b. Existing minor |
45 |
90 |
65 |
135 |
|
c. Existing major |
30-45* |
90 |
45-65 |
135 |
*Actual number would be established after case-by-case review of individual facilities.
AUTHORITY NOTE: Promulgated in accordance with R.S. 30:2001 et seq., and in particular Section 2074(B)(3) and (B)(4)
