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WEDNESDAY, JULY 19, 1978
IN REPLY TO ANOTHER QUESTION FROM DR. FANG ON THE LEVELS OF NOXIOUS FUMES EMITTED BY MOTOR VEHICLES IN THE NEW LION ROCK TUNNEL, MR. JONES SAID THE AVERAGE IS 50 PARTS PER MILLION (PPM) ON WEEKDAYS AND 75 PPM ON SUNDAYS WITH THE HIGHEST READING RECORDED SO FAR EEING 80 PPM.
+THESE LEVELS ARE ACCEPTABLE FROM A HEALTH POINT OF VIEW AND ARE WELL WITHIN INTERNATIONAL OPERATING STANDARDS,+ HE SAID.
+A DANGEROUS LEVEL IS ONLY REACHED WHEN CARBON MONOXIDE IN A TUNNEL EXCEEDS 400 PPM OR, DURING ANY 30 MINUTE PERIOD, AN AVERAGE OF 250 PPM,+ HE ADDED.
MR. JONES ALSO POINTED OUT THAT THE VENTILATION SYSTEMS OF THE TWO LION ROCK TUNNELS ARE CONSIDERED TO BE ADEQUATE AND THEY WILL WORK BETTER WHEN BOTH TUEES ARE OPEN TO TRAFFIC LATER THIS YEAR BECAUSE OF THE RAM EFFECT OF VEHICLES TRAVELLING IN ONE DIRECTION ONLY.
HE POINTED OUT THAT THE PRESENT RATHER POOR VISIBILITY IN THE TUNNEL IS CAUSED BY THE DUST FROM EARTH CARRYING LORRIES, PARTICULARLY THOSE MOVING FROM THE MASS TRANSIT RAILWAY WORK SITES TO THE RECLAMATIONS IN SHA TIN.
+THIS SITUATION WILL ALSO IMPROVE WHEN BOTH TUBES ARE OPEN TO TRAFFIC AND IT WILL CEASE ALTOGETHER WHEN THE WORKS ARE FINISHED, + MR. JONES SAID.
REFERRING TO ANOTHER QUESTION ON THE VENTILATION CONDITIONS OF THE COVERED FRONTAGE AREA OUTSIDE THE BUFFER HALL OF THE KAI TAK AIRPORT TERMINAL BUILDING USED BY TOURIST COACHES AS A PICK-UP POINT, MR. JONES SAID THEY WILL BE IMPROVED BY MARCH NEXT YEAR WHEN THE FIRST PHASE OF A VENTILATION SYSTEM BECOMES OPERATIONAL.
HE SAID THE NATURAL AIR FLOW IN THE AREA HAS BEEN PARTIALLY IMPEDED EY HOARDINGS PUT UP AT THE WESTERN END OF THE BUILDING TO ENABLE THE WORK ON THE EXTENSION OF THE TERMINAL BUILDING TO PROCEED.
+AS THE EXTENSION TO THE TERMINAL BUILDING PROGRESSES, THE AIR FLOW SHOULD BE IMPROVED BECAUSE THE DESIGN OF THE BUILDING PROVIDES FOR THE INSTALLATION OF A VENTILATION SYSTEM WHICH WOULD ENSURE A CONSTANT CIRCULATION OF FRESH AIR IN ALL THE COVERED AREAS OUTSIDE THE TERMINAL BUILDING,+ MR. JONES SAID.
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