SECTION 252:515-43-60. Composting time

Latest version.

  Composting time and temperatures shall meet the following requirements:
(1)   Windrow composting. The compost material must be maintained at a minimum average temperature of 55°C (131° F) or higher for 15 days or longer. The 15 or more days at or above 55°C (131° F) do not have to be continuous.
(2)   Aerated static pile or in-vessel composting process. Material maintained at a minimum average temperature of 55°C (131° F) or higher for three continuous days, followed by at least 14 days with a minimum of 45°C (113° F).
(3)   Passive pile. Material maintained below 75°C (170° F) for the active composting period. Finished compost must meet standards as specified in the permit or plan.
(4)   Hybrid composting. Material maintained as specified in the permit or plan.

[Source: Added at 34 Ok Reg 1199, eff 9-15-17]

                    
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