View - North East Lincolnshire Council

BOC Immingham Dissolved Acetylene Project Environmental Statement: Vol. 2 Main Text
Table 7.3 Land Contamination Impact Assessment for Construction Phase
Receptor Baseline Risk Construction
Phase
Significance
Human (on site) Very Low Risk Low Risk Minor Adverse
Human (offsite) Very Low Risk Very Low Risk Neutral
Groundwater Very Low Risk Low Risk Minor Adverse
Surface Water Very Low Risk Low Risk Minor Adverse
Property (on site crops) Very Low Risk No Risk (not
present)
n/a (not present)
Property (offsite crops) Very Low Risk Very Low Risk Neutral
Property (offsite buildings) Very Low Risk Very Low Risk Neutral
Operation
7.75 As for the construction phase assessment above, the land contamination impact assessment for
operation is based on the change in risk between the baseline and the operational phase. The
potential effects of the operational phase activities will also be contained and or controlled by
appropriate buildings design (e.g. selection of materials, appropriate bunding etc).
7.76 Good practice methods will be employed which will include measures to minimise prevent creation
of sources and pathways. The Dissolved Acetylene facility will be operated in line with BAT and
the requirements of the EP. An operational EMP and WMP will be developed and implemented as
part of the EMS for the site. On the basis of the above, the operational phase contamination risk
assessment is summarised as follows:
� on site human receptors (future site users): the probability of the PPL is considered ‘unlikely’
and the consequence is considered ‘mild’. Operational activities are unlikely to result in
exposure to contaminants in soil (if these are present), or to vapour ground gas because of
source removal pathway barriers. The risk identified is ‘very low’;
� offsite human receptors: the probability of the PPL is considered ‘unlikely’ and the
consequence is considered ‘mild’. Operational activities are unlikely to result in exposure to
windblown soil-derived dust contamination (because of pathway barriers), or to migrating
vapours ground gas (because of no source or source removal). The risk is identified as ‘very
low’;
� controlled waters receptors (groundwater in the Superficial Deposits): the probability of the
PPL is considered ‘unlikely’ and the consequence is considered ‘mild’. Operational activities
are unlikely to result in release of contaminants to ground groundwater because of pollution
prevention measures, operating practices and management techniques. The risk is identified
as ‘very low’;
� controlled waters receptors (Humber Estuary): the probability of the PPL is considered
‘unlikely’ and the consequence is considered ‘mild’. Operational activities are unlikely to
result in release of contaminants to surface water (via groundwater) because of pollution
prevention measures, operating practices and management techniques. The risk is identified
as ‘very low’;
5100935.404 Environmental Statement August 2011 108