SUNDAY, JULY 7, 1991
IT
DID NOT
IN
ALTHOUGH THE FREE VENTING GAS HAD A STRONG ODOUR, GIVE RISE TO ENVIRONMENTAL CONCERN AS THERE WAS LITTLE DEVELOPMENT THE AREA DURING THE EARLY 1980S.
CROSSING,
MAJOR
WITH THE CONSTRUCTION OF THE EASTERN HARBOUR
THE LANDFILL SITE DEVELOPMENTS WERE PLANNED IMMEDIATELY ADJACENT TO WHICH WOULD RESULT IN A POPULATION OF AROUND 40,000 LIVING WITHIN METRES OF THE LANDFILL.
1987, THE SERVICES
500
GEOTECHNICAL IN
CONTROL OFFICE OF THE CIVIL ENGINEERING
DEPARTMENT COMPLETED AN INITIAL FEASIBILITY STUDY WHICH SHOWED POTENTIAL RISKS TO THE PROPOSED REFUSE SLOPE INSTABILITY AND THE MIGRATION OF LANDFILL GAS.
DEVELOPMENTS FROM
THE SAFETY OF IMPLEMENTED
IN ORDER TO MINIMISE THESE RISKS AND TO ENSURE SURROUNDING DEVELOPMENTS, THE GEOTECHNICAL CONTROL OFFICE A PROGRAMME OF LANDFILL RESTORATION WORKS WHICH JUNE 1989.
THE MAJOR WORKS INCLUDED THE FOLLOWING:
STARTED ON SITE IN
REGRADING RECOMPACTION AND
OF THE SOIL COVER OVER THE ENTIRE LANDFILL AREA TO PROVIDE ADEQUATE STABILITY AND ALLOW THE WHOLE AREA TO BE USED FOR PASSIVE RECREATION IN FUTURE.
OF
PROVISION OF A LANDFILL GAS EXTRACTION SYSTEM CONSISTING GAS WELLS, GAS PIPES AND AN ABSTRACTION PLANT TO EXTRACT AND DISPOSE OF THE GAS THROUGH CONTROLLED FLARING.
*
PROVISION OF A GAS CUT OFF BARRIER AROUND THE THE SITE.
PERIMETER
OF
*
*
PROVISION OF A SURFACE POLYETHYLENE PERFORATED ONGOING SETTLEMENT OF THE LANDFILL.
PIPES
PROVISION OF ON-SITE AND OFF-SITE GAS MONITORING POINTS.
OF FLEXIBLE SYSTEM CAPABLE OF TOLERATING THE
DRAINAGE
GAS CONTROL GAS CONSULTANT,
THE STUDY AND PRELIMINARY DESIGN OF LANDFILL
A MEASURES WERE UNDERTAKEN BY
SPECIALIST LANDFILL EMPLOYED BY THE ENVIRONMENTAL PROTECTION DEPARTMENT.
THE CIVIL
AND GEOTECHNICAL WORKS
ASSOCIATED WITH THE GAS WORKS WERE DESIGNED AND AND THE INSTALLATION SUPERVISED BY THE
SLOPE STABILISATION CONTROL MEASURES AND SUPERVISED BY THE GEOTECHNICAL CONTROL OFFICE,
WAS EQUIPMENT OF THE GAS EXTRACTION AND FLARING
ELECTRICAL AND MECHANICAL SERVICES DEPARTMENT.
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