Okla. Admin. Code § 252:641-15-3

Current through Vol. 42, No. 7, December 16, 2024

Section 252:641-15-3 - Bottom construction

The bottom of the lagoon shall meet the following requirements:

(1)Level bottom. The bottom of the lagoon shall be level.

(2)Compacted clay. The bottom of the lagoon and the interior slope of the dike shall be constructed of homogeneous clay soil and shall be compacted thoroughly.

(3)Leakage test required. During the final inspection, a leakage test shall be conducted on the lagoon.

(A)Leakage test procedure. The leakage test shall be performed in a manner approved by the DEQ or by:

(i) digging one (1) hole in the bottom of the lagoon and four (4) equally spaced holes on the interior slope of the dike at the four-foot water elevation line of the lagoon. The test holes shall be six inches (6") deep;

(ii) presoaking the holes by filling them with water and refilling them as necessary to maintain a water depth of six inches (6") in each hole for at least four (4) hours. The presoak shall commence no earlier than twenty-four (24) hours prior to the start of the leakage test procedure; and

(iii) after completing the presoak, filling each hole with water and then recording the drop in the water level in sixty (60) minutes or the time it takes until one inch (1") of water has percolated into the soil.

(B)Failing leakage test. If the leakage rate in any of the test holes exceeds one inch (1") in sixty (60) minutes, the lagoon shall be lined withtwelve inches (12") of compacted clay (Group 5 soil) or bentonite, or a synthetic liner in accordance with OAC 252:656. The lagoon shall be retested after installation of a clay or bentonite liner and may not be approved until the leakage rate is less than or equal to one inch (1") in sixty (60) minutes.

Okla. Admin. Code § 252:641-15-3

Added at 16 Ok Reg 1895, eff 6-11-99; Amended at 18 Ok Reg 1616, eff 6-1-01; Amended at 21 Ok Reg 1618, eff 6-11-04; Amended at 25 Ok Reg 2318, eff 7-11-08; Amended at 29 Ok Reg 1053, eff 7-1-12