Code of Federal Regulations Title 40. Protection of Environment § 40.258.23 Explosive gases control

(1) The concentration of methane gas generated by the facility does not exceed 25 percent of the lower explosive limit for methane in facility structures (excluding gas control or recovery system components);  and

(2) The concentration of methane gas does not exceed the lower explosive limit for methane at the facility property boundary.

(1) The type and frequency of monitoring must be determined based on the following factors:

(2) The minimum frequency of monitoring shall be quarterly.

(1) Immediately take all necessary steps to ensure protection of human health and notify the State Director;

(2) Within seven days of detection, place in the operating record the methane gas levels detected and a description of the steps taken to protect human health;  and

(3) Within 60 days of detection, implement a remediation plan for the methane gas releases, place a copy of the plan in the operating record, and notify the State Director that the plan has been implemented. The plan shall describe the nature and extent of the problem and the proposed remedy.

(4) The Director of an approved State may establish alternative schedules for demonstrating compliance with paragraphs (c) (2) and (3) of this section.

(1) Consider the unique characteristics of small communities;

(2) Take into account climatic and hydrogeologic conditions;  and

(3) Be protective of human health and the environment.