1964_CROSS-HARBOUR_TUNNEL_REGULATIONS — Page 2

A 2

CAP. 203]

Cross-Harbour Tunnel Regulations

[Subsidiary]

[1984 Ed.

75/88540

LN. 107/84.

(e) ensure that-

(i) an adequate number of the vehicles referred to in paragraph (d) is manned and maintained at all times in a state of readiness; and

(ii) while any such vehicle is present in a lane, a two-way radio link is available between the vehicle and the control centre;

(f) ensure that the concentration of carbon monoxide gas in the tunnel area does not at any time exceed 400 parts per million by volume or, during any 30 minute period, a mean of 250 parts per million by volume;

(g) provide equipment for the continuous measurement and recording of the concentration of carbon monoxide gas in the tunnel and for visual and audible alarm warnings to be given in the control centre if the concentration exceeds the level specified in paragraph (f);

(h) provide equipment for the continuous measurement and recording of petrol vapour in the tunnel centre sump at the lowest point of the tunnel;

(i) ensure that the equipment referred to in paragraph (h) will give visual and audible alarm warnings if the concentration of petrol vapour exceeds 0.35%;

(j) provide fire extinguishing equipment in the tunnel centre sump at the lowest point of the tunnel which equipment shall come into operation automatically if the concentration of petrol vapour exceeds 0.8%.

(k) provide adequate and efficient illumination within the tunnel area;

(l) ensure that the illumination referred to in paragraph (k) is varied having regard to the volume of traffic using the tunnel and the light conditions outside the tunnel;

(m) provide for 2 independent outside sources of electric power so that, if there is failure of one source, adequate electric power continues to be available for the full operation of the facilities of the tunnel area;

(n) in addition to the requirements mentioned in paragraph (m), maintain in a state of readiness at all times electricity generating equipment which will be sufficient to operate the illumination and traffic signal systems in the tunnel area in the event of failure of the outside sources of electric power;

(o) provide an adequate system of ventilation for the safety of persons using or employed in the tunnel area;

(p) ensure that the noise emitted by the ventilation system, when measured at a distance of 30 m from any part of the ventilation system, above ground and water level, does not exceed...