SECTION 252:653-9-7. Operation and maintenance of infiltration basins

(a)   Operation. The operation of infiltration basins shall include:

(1)   Flow rate. The flow rate into the infiltration basin shall be calculated based on the capacity of the infiltration basin to minimize the likelihood of overflow. Annual precipitation and evaporation should be taken into account.

(2)   Monitoring. The infiltration basin(s) shall be monitored as required by DEQ, to include at a minimum, flow rate, infiltration rate, and any constituents required by the operations permit.

(b)   Maintenance. The method and schedule for maintaining the infiltration basin(s) shall include:

(1)   the method for addressing the development of clogging layers and maintaining design recharge capacity;

(2)   the frequency at which maintenance, including debris/sediment cleanout, occurs; and

(3)   maintenance shall be in relation to site-specific variables such as soil characteristics, source water chemistry and facility design.

(c)   Inspections. The permittee shall conduct routine inspections as follows:

(1)   annual inspections of sediment traps or forebays and cleanout;

(2)   monthly inspections of erosion prevention measures; and

(3)   monthly inspections of flood control features.

[Source: Added at 35 Ok Reg 1333, eff 9-15-18]