Regulation 179(1) A manager of a mine shall in relation to the mine, take steps that are necessary to ensure that adequate ventilation is supplied to places where persons are travelling or working underground.(2) For the purposes of sub-regulation (1), ventilation is adequate if it(a) ensures that the amount of oxygen in the general body of the air is not less than nineteen per cent by volume;(b) ensures that the amount of carbon dioxide, carbon monoxide, nitrous fumes, sulphur dioxide and hydrogen sulphide in  the general body of the air do not exceed in the case of(i) carbon dioxide (CO2) 0.5% by volume or 5000ppm;(ii) carbon monoxide (CO) 0.005% by volume or 50ppm;(iii) Sulphur dioxide (SO2) 0.0005% by volume or 5ppm;(iv) nitrogen dioxide (NO2) 0.0003% by volume or 3ppm;(v) nitrous fumes (NOx) 0.0025% by volume or 25ppm; and(vi) methane (NH4) 1% by volume or 10,000ppm;(c) dilutes or removes any other toxic gas or fume so that the amount of the gas or fume in the general body of the air conforms to the requirements that may be prescribed, by the Chief Inspector;(d) dilutes or removes harmful dust so that the amount of the dust in the general body of the air conforms to the requirement prescribed by the Chief Inspector;(e) maintains working conditions free from(i) dangerous temperatures, and(ii) high relative humidity in the general body of the air;(f) provides any diesel unit with not less than 0.06 cubic metres of air per second per kilowatt of the diesel unit for the purpose of diluting or removing toxic gas or fumes in the general body of the air at places where the diesel unit operates; and(g) ensures that the quantity of pure air circulating around working places and stopes in the mine is not less than 0.05 cubic meters per second for each person underground.(3) The manager of a mine shall ensure that the speed of air in the mine is(a) not below(i) 0.2 m/s in roadways, and(ii) 0.1 m/s in large excavations, and(b) does not exceed 6 m/s.(4) The manager of a mine shall ensure that in the mine(a) the quality of air is continuously monitored to enable the detection of carbon monoxide in main return airways, and(b) the data relating to the monitoring is transmitted to the central control room at the surface.(5) The Chief Inspector of Mines may issue guidelines on quality of air in a mine.