XN000022-1991-06-20 — Page 18

THURSDAY, JUNE 20, 14

17

COLI DATA OBTAINED AS WITH LAST YEAR,

OF SUFFERING SOME SWIMMING AT

THE GRADING IS BASED ON THE MOST RECENT E. BY THE EPD IN ITS ROUTINE MONITORING PROGRAMME. THE GRADING ALSO INCLUDES AN ESTIMATE OF THE RISK MINOR SKIN OR GASTROINTESTINAL COMPLAINTS AS A RESULT OF A BEACH WHICH HAS SOME DEGREE OF POLLUTION.

A VERY LARGE BODY OF THE ESTIMATE IS BASED ON INFORMATION GATHERED IN HONG KONG IN RECENT BATHING SEASONS.

STATISTICAL

THE SUMMER. THIS THE BACTERIOLOGICAL QUALITY OF BRING MORE OR LESS

THE GRADING OF SOME BEACHES MAY VARY DURING REPRESENTS A NATURAL FLUCTUATION IN BATHING WATERS IN MOST CASES, AS RAIN AND TIDES POLLUTION TO THE BEACHES.

OF THE WATER BEST

HOWEVER, THE GRADES GIVE A GOOD GENERAL PICTURE QUALITY AT BATHING BEACHES AT THE TIME OF REPORTING AND FORM THE AVAILABLE FORECAST, FOR THE IMMEDIATE FUTURE.

AN EPD SPOKESMAN SAID BEACHES WITH HIGHLY DEVELOPED HINTERLANDS THE GRADES SUGGEST DURING AND ARE LIKELY TO BE MORE POLLUTED THAN AFTER HEAVY RAIN.

AFTER "BATHERS SHOULD AVOID SUCH BEACHES FOR TWO OR THREE DAYS

IF THERE IS A STORM, LONGER IF THE WEATHER REMAINS OVERCAST OR LESS STRONG SUNSHINE," THE SPOKESMAN SAID.

THE SYSTEM FOR GRADING BEACH WATER QUALITY IS AS FOLLOWS:

"

BEACH SO SWIMMERS IS

GRADE 1" INDICATES THAT THE WATER QUALITY IS GOOD. THE E. COLI COUNT IS NO MORE THAN 24 PER 100 MILLILITRES AT EACH GRADED, AND THE EXPROTED RISK OF MINOR ILLNESS TO UNDETECTABLE.

SO

10 CASES

GRADE "2" INDICATES THAT THE WATER QUALITY IS FAIR. THE E. COLI COUNT IS NO MORE THAN 180 PER 100 MILLILITRES AT EACH BEACH GRADED, AND THE EXPECTED HEALTH RISK IS NO MORE THAN OF MINOR ILLNESS PER 1,000 SWIMMERS.

GRADE "3" INDICATES THAT THE WATER QUALITY IS R. COLI COUNT IS NO MORE THAN 610 PER 100 MILLILITRES BEACH SO GRADED, AND THE EXPECTED HEALTH RISK IS NO 15 CASES OF MINOR ILLNESS PER 1,000 SWIMMERS.

ACCEPTABLE.

AT MORK

THE FACH THAN

THE E. COLI AT EACH BEACH SO CASPS OF

GRADE "1" INDICATES THAT THE WATER QUALITY IS POOR, COUNT IS MORE THAN 610 PER 100 MILLILITRES GRADED, AND THE EXPECTED HEALTH RISK IS MORE THAN 15 MINOR ILLNESS PER 1,000 SWIMMERS.

A

BEACH TO SWIMMERS IS POLLUTION IS ACCEPTABLE.

ONLY BE CONSIDERED

REPEATEDLY, BATHING SEASON EXCEEDED

BY

15

THE DECISION WHETHER OR NOT TO CLOSE A

OF WHAT DEGREE OF BASED ON A JUDGEMENT

THE NORMALLY,

CLOSURE OF

BEACH WOULD THE URBAN OR REGIONAL COUNCIL IF A "4" GRADE OCCURRED

OVER THE THAT THE AVERAGE HEALTH RISK CASES PER 1,000 SWIMMERS.

OP A CLOSED BEACH WOULD THE REOPENING SIMILARLY, CONSIDERED IF A "3" GRADE OR BETTER WERE CONSISTENTLY OBTAINED.

1:1

/AT PRESENT