Public reports pack PDF 9 MB - Gravesham Borough Council

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Regulatory Board 27.05.2009
(c)
(d)
the site investigation results and the detailed risk assessment (2) and,
based on these, an options appraisal and remediation strategy giving
full details of the remediation measures required and how they are to
be undertaken;
a verification plan providing details of the data that will be collected in
order to demonstrate that the works set out in (3) are complete and
identifying any requirements for longer-term monitoring of pollutant
linkages, maintenance and arrangements for contingency action.
Any changes to these components require the express consent of the Local
Planning Authority. The scheme shall be implemented as approved.
(15) the development hereby permitted shall incorporate some or all of the
following building design measures:-
(a)
(b)
(d)
(d)
(e)
(f)
(g)
the provision of gas impermeable membrane in a competent floor
slab;
above ground entry of services such that the floor slab is maintained
intact;
the sealing of service ducts and entry points against the ingress of
landfill gases. It is advisable that service junctions into buildings
should be through vented junction boxes;
the provision of below floor venting by active or passive means.
Passive means are by provision of air vents in outer walls to the below
floor airspace. Air flow can be improved by adding vertical stacks
incorporating a rotating cowl if required. Active venting is by means of
positive ventilation systems. Air vents in passive systems must be
kept free of any growth, a concentrate apron around the outer wall
may secure this provision;
the provision of methane and carbon dioxide gas monitors/alarms in
below floor spaces and dead air spaces within the building;
the provision of open hole windows in all occupied buildings;
further measures to protect the site as a whole may include gas
venting trenches and open grassed areas.
The need for such measures shall be determined on the basis of existing data
from current and previous monitoring of land fill gas by Kent County Council.
Details of the building design measures shall be submitted to and approved
by the Local Planning Authority before the commencement of the
development.
(16) floor levels of the units should be set a minimum of 300mm above local
ground level;
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