XN000022-1993-10-12 — Page 9

TUESDAY, OCTOBER 12, 1993

IN MONG KOK, TSP

REACHED

CONCENTRATION ALMOST LIMIT ON SEPTEMBER 13 AND NO2 LEVELS ALMOST REACHED LIMIT ON SEPTEMBER 14.

THE 24-HOUR THE 24-HOUR AQO

ALLOWED POLLUTANT 24-HOUR

ALSO LOW WINDSPEEDS ON SEPTEMBER 28 AND 29

LEVELS IN MONG KOK WERE CLOSE TO THE

CONCENTRATIONS TO RISE. LIMIT ON SEPTEMBER 28.

SEPTEMBER

THE SAW

PASSAGE OF TWO

TYPHOONS;

"BECKY" ON

SEPTEMBER 17 AND "DOT" BETWEEN SEPTEMBER 24 AND 26.

ALL SITES

OF

ON SEPTEMBER 17, POLLUTANT CONCENTRATIONS DIPPED AT

THE AS BECKY' BROUGHT IN CLEANER AIR AND THE RAIN WASHED OUT SOME

OF 'DOT' BUT THE EFFECT WAS SIMILAR DURING THE PASSAGE POLLUTANTS.

NOT SO MARKED.

WITH THE REASON FOR THIS

MUCH

REGARDS ΤΟ NO2 CONCENTRATIONS IS THOUGHT TO BE BECAUSE THERE WAS STILL SIGNIFICANT TRAFFIC DURING OF THE STORM PASSAGE.

FOR THE MONTH WERE

FINALLY, IN MONG KOK, SO2 CONCENTRATIONS ABOUT HALF THE LEVELS DURING THE SAME MONTH LAST YEAR.

THE FOUR

POLLUTANTS DISCUSSED MOSTLY ORIGINATES FROM THE COMBUSTION FUELS.

NO2 IS FORMED EITHER DIRECTLY ATMOSPHERIC OXIDATION OF NITRIC OXIDE DURING COMBUSTION.

HAVE DIFFERENT ORIGINS. S02 OF SULPHUR CONTAINING FOSSIL

DURING COMBUSTION

(NO)

OR,

WHICH IS ALSO

BY THE PRODUCED

MAJOR SOURCE VEHICLE EXHAUST IS A

OF NO AND NO2. VEHICLE

OTHER PARTICLES.

SOURCES EXHAUST IS ALSO A MAJOR SOURCE OF AIRBORNE

ACTIVITIES, THE INCLUDE INDUSTRY, FURNACES AND BOILERS, CONSTRUCTION SEA AND SOIL DUST.

EPD

STATIONS,

MONITORS CURRENTLY INCLUDING THE MEASUREMENT CAMPAIGNS ARE ARISES.

AIR

QUALITY CONTINUOUSLY THREE MENTIONED ABOVE.

AT

EIGHT

SHORT-TERM

ALSO UNDERTAKEN AS AND WHERE 'THE

NEED

NOTE TO EDITORS:

FURTHER ENQUIRY CAN BE DIRECTED ΤΟ PRINCIPAL PROTECTION OFFICER, MR RAYMOND LEUNG ON TEL 594 6401.

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ENVIRONMENTAL