WEDNESDAY, JANUARY 21, 1976.
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LION ROCK TUNNEL VENTILATION ADEQUATE
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ADEQUATE VENTILATION EXISTS AT THE LION ROCK TUNNEL TO DISPERSE FUMES EMITTED BY VEHICLES. THE DIRECTOR OF PUBLIC WORKS,
THE HON, DAVID MCDONALD, TOLD THE LEGISLATIVE COUNCIL. TODAY.
MONITORING DEVICES OPERATING AT LION ROCK TUNNEL, HE SAID. INDICATED THAT UNDER PRESENT USAGE VISIBILITY AND CARBON MONOXIDE LEVELS WERE WELL WITHIN ACCEPTED INTERNATIONAL LIMITS, AND NO ADDITIONAL VENTILATORS WERE REQUIRED AT THIS TIME.
MR. MCDONALD WAS REPLYING TO A QUESTION FROM DR. THE HON. HARRY FANG, WHO WANTED TO KNOW WHETHER THE VENTILATION IN THE TUNNEL WOULD BE IMPROVED.
THE DIRECTOR NOTED THAT THE VENTILATION EQUIPMENT WAS OPERATED TO SUIT PREVAILING TRAFFIC CONDITIONS AND THE PLANT NORMALLY RAN AT BETWEEN 20 PER CENT AND 85 PER CENT OF FULL POWER.
+THERE IS THEREFORE SPARE CAPACITY TO IMPROVE CONDITIONS WHENEVER THIS IS FOUND TO BE NECESSARY,+ HE SAID.
MR. MCDONALD POINTED OUT THAT FURTHER IMPROVEMENT COULD BE EXPECTED WHEN THE SECOND LION ROCK TUNNEL, NOW UNDER CONSTRUCTION, IS COMPLETED TOWARDS THE END OF NEXT YEAR.
+WHEN BOTH TUNNELS ARE IN USE EACH TUBE WILL OPERATE ON A ONE-WAY TRAFFIC SYSTEM, AND THE INTRODUCTION OF THIS SYSTEM WILL IMPROVE VENTILATION DUE TO THE PISTON EFFECT CREATED BY ONE-WAY VEHICLE MOVEMENT,+ HE SAID.
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