S.C. Code Regs. § § 61-82.II

Current through Register Vol. 48, 12, December 27, 2024

Section 61-82.II - Proper closeout of lagoons

1. Lagoons shall be drained only after written permission has been obtained from DHEC and in accordance with one of the below procedures, (procedures in order of decreasing desirability):

a. Sewage from the lagoon may be pumped into the treatment facility or receiving system replacing the lagoon, provided that the rate is such that hydraulic and/or organic overloading and surging of the replacement system is prevented and provided that permission is obtained from the owner of the replacement system; or

b. If the above method is not possible, the lagoon may be drained into the receiving stream at a rate not exceeding the maximum design flow of the lagoon, provided that before draining, the lagoon is allowed to stabilize without additional inflowing sewage for a period not less than the design retention time of the lagoon.

c. If neither of the above methods is possible, an alternative method of closeout may be proposed for DHEC consideration.

2. In each of the above alternatives, the lagoon shall be drained from the surface of the lagoon to prevent accumulated solids on the bottom of the lagoon from being carried out of the lagoon.

3. After the treated sewage has been drained from the lagoon, solid accumulation on the bottom of the lagoon shall be allowed to dry. A disinfectant suitable for control of odors and vectors shall be applied to all remaining solids when determined necessary by DHEC. After drying, the solids should be mixed with soil and left on the bottom of the lagoon, be removed for disposal in an approved landfill, or disposed in some other approved method.

4. The lagoon may be filled with soil or may be allowed to remain bowlshaped, so as to be utilized for purposes other than waste handling, i.e., fish ponds, irrigation ponds, etc., provided that this practice does not violate local health and vector control regulations and DHEC approval of the close-out is obtained prior to any alternative use of the facility.

S.C. Code Regs. § 61-82.II