Regulation 188A manager of a mine shall ensure that a competent person takes samples of the general body of the air in the mine where a diesel equipment operates in the mine to determine(a) the volume of air flow in that area of the mine;(b) at least once a month and immediately following repairs to the equipment which may affect the combustion characteristics of the equipment,(i) the carbon monoxide (CO), and(ii) nitrous fumes (NOx)contents of the undiluted exhaust discharge into the underground atmosphere;(c) at least once a month, at the request of the operator, the carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO2) and carbon dioxide (CO2) contents of the atmosphere at the operator's position; and(d) at least once every three months the content of other gases in the atmosphere at the operator's position.