MONDAY, JULY 12, 1993
19
AIR QUALITY REPORT FOR JUNE RELEASED
THE ENVIRONMENTAL PROTECTION DEPARTMENT RELEASED AIR QUALITY INFORMATION FOR JUNE 1993.
(EPO) TODAY (MONDAY)
A SPOKESMAN FOR THE EPD 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 USB TYPES FOUND IN THE TERRITORY, NAMELY;
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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 (SO2), 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.
IN JUNE, THERE WERE NO EXCEEDANCE OF THE ONE-HOUR AND 24-HOUR AIR QUALITY OBJECTIVES FOR ANY OF THE POLLUTANTS REPORTED.
COMPARED TO 1992, MONTHLY VALUES OF NO2 AND TSP AT MONG KOK AND KWAT CHUNG WERE SLIGHTLY HIGHER THAN IN THE SAME MONTH.
IN KWAI CHUNG, SO2 WAS HIGHER THAN LAST YEAR BUT AT IT WAS SIMILAR.
MONG KOK
AMONGST THE STATIONS REPORTED, LEVELS OF NO2 AND PARTICULATES REMAINED HIGHER AT THE GROUND LEVEL SITE IN MONG KOK THAN THE OTHER TWO SITES.
DURING THE MONTH, PEAKS OF S02 AT KWAI CHUNG WERE OBSERVED ON JUNE 1, 5, 7 AND 22.
PRELIMINARY ANALYSIS INDICATED THAT A SINGLE LARGE EMISSION SOURCE TOGETHER WITH THE PREVAILING WIND CONDITIONS MIGHT HAVE ACCOUNTED FOR THE FIRST THREE PEAKS WHILE TOTAL EMISSIONS FROM NEARBY INDUSTRIAL AREAS UNDER LOW WIND SPEED SITUATIONS COULD BE THE CAUSE OF THE FOURTH PEAK.
ON JUNE 6, NO2 LEVELS ROSE TO A MAXIMUM AT ALL REPORTED SITES FOR THE MONTH.
IN MONG KOK, THE DAILY AVERAGE VALUE WAS 123 UG/CU M BUT STILL SMALLER THAN THE 24-HOUR AIR QUALITY OBJECTIVE VALUE OF 150.
/THE EPD
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