TUESDAY, APRIL 13, 1993
"EMPHASIS WILL BE GIVEN TO ACHIEVING EARLY ENVIRONMENTAL IMPROVEMENTS TO THE ISLAND WATERCOURSES AND TO PROTECTING THE WATERS IN THE SOUTHERN AND NORTH WESTERN WATER CONTROL ZONES," HE ADDED.
THE STUDY, AT A COST OF $11 MILLION, WILL BE CARRIED OUT IN TWO PHASES AND BE COMPLETED IN 18 MONTHS.
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AIR QUALITY REPORT FOR MARCH
THE ENVIRONMENTAL PROTECTION DEPARTMENT TODAY (TUESDAY) RELEASED AIR QUALITY INFORMATION FOR MARCH.
A SPOKESMAN FOR THE DEPARTMENT SAID THE PURPOSE OF THE ANNOUNCEMENT WAS TO KEEP THE PUBLIC INFORMED OF THE AIR QUALITY LEVELS IN THE TERRITORY AND TO EXPLAIN THE MEASUREMENTS.
THE ANNOUNCEMENT NORMALLY CONTAINS MONITORING RESULTS OBTAINED AT ITS MONG KOK, CENTRAL/WESTERN AND KWAI CHUNG MONITORING STATIONS.
THESE LOCATIONS ARE TYPICAL OF THREE OF THE IMPORTANT LAND USE TYPES FOUND IN THE TERRITORY:
LOCATIONS CLOSE TO ROAD TRAFFIC IN BUILT-UP URBAN DISTRICTS,
COMBINED COMMERCIAL AND RESIDENTIAL DISTRICTS, AND
DISTRICTS CLOSE TO INDUSTRIAL AREAS.
THE REPORTED AIR POLLUTANTS INCLUDE SULPHUR DIOXIDE [S02), NITROGEN DIOXIDE (NO2), RESPIRABLE SUSPENDED PARTICULATES (RSP) AND TOTAL SUSPENDED PARTICULATES (TSP).
THE GASEOUS POLLUTANTS ARE MONITORED CONTINUOUSLY WHILE PARTICLE SAMPLES ARE COLLECTED FOR 24 HOURS, ONCE EVERY SIX DAYS.
MARCH WAS A COMPARATIVELY UNEVENTFUL MONTH
IN TERMS OF AIR QUALITY. LEVELS OF ALL THE REPORTED POLLUTANTS WERE BELOW THE 24-HOUR HONG KONG AIR QUALITY OBJECTIVE VALUES,
HOWEVER, AT MONG KOK, THE LEVELS OF TSP WERE A SIGNIFICANT PROPORTION OF THE AIR QUALITY OBJECTIVE VALUE.
THE LEVELS OF PARTICLES IN THE AIR WERE AGAIN HIGHER AT MONG KOK THAN AT THE OTHER TWO STATIONS. TSP CONCENTRATIONS AT MONG KOK AND KWAI CHUNG WERE HIGHER THAN IN THE SAME MONTH LAST YEAR.
THE FOUR POLLUTANTS HAVE DIFFERENT ORIGINS. S02 MOSTLY ORIGINATES FROM THE COMBUSTION OF SULPHUR CONTAINING FOSSIL FUELS.
NO2 IS FORMED EITHER DIRECTLY DURING COMBUSTION
OR, BY THE ATMOSPHERIC OXIDATION OF NITRIC OXIDE (NO) WHICH IS ALSO PRODUCED DURING COMBUSTION.
/VEHICLE EXHAUST
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