Environmental Statement - Maersk Oil
Environmental Statement - Maersk Oil
Environmental Statement - Maersk Oil
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Discharges to Sea Discharge from<br />
pipeline pressure<br />
testing<br />
B ‐ 6<br />
Discharge of fluid<br />
from the open<br />
subsea control<br />
system<br />
Disposal to land General waste from<br />
pipelay, installation<br />
of infield infra‐<br />
structure and<br />
support vessels<br />
After installation pipelines<br />
need to be pressure tested.<br />
The lines are to be filled with<br />
potable water, dosed with<br />
biocide, oxygen scavenger, dye<br />
& corrosion inhibitor. The<br />
displaced water, along with<br />
chemical additives may be<br />
discharged to the sea surface<br />
or processed through existing<br />
facilities & reinjected with the<br />
produced water stream.<br />
Hydraulic control of subsea<br />
facilities.<br />
Control systems use water<br />
based hydraulic fluid in an<br />
open system.<br />
Pipelay and installation<br />
generate a number of wastes<br />
during routine operations<br />
including waste oil, scrap metal<br />
and domestic wastes<br />
Localised effect on water quality associated with discharge to<br />
sea of seawater containing chemicals from hydrotesting of<br />
lines.<br />
Likelihood Consequence Risk<br />
5 1 Low<br />
In an open system fluids will be released to sea with resultant<br />
short term effects on local flora and fauna<br />
Likelihood Consequence Risk<br />
5 1 Low<br />
Impacts associated with onshore disposal are dependent on<br />
the nature of the site or process. Landfills – land take,<br />
nuisance, emissions (methane), possible leachate, limitations<br />
on future land use. Treatment plants‐ nuisance, atmospheric<br />
emissions, potential for contamination of sites.<br />
Likelihood Consequence Risk<br />
5 1 Low<br />
Physical presence Installation vessels Presence of installation vessels. Shipping and commercial fishing vessels are prohibited from<br />
entering the safety zones around installation vessels.<br />
Likelihood Consequence Risk<br />
5 1 Low<br />
Balloch Field Development <strong>Environmental</strong> <strong>Statement</strong><br />
Use of chemicals will be kept to a<br />
minimum & will be of as low a<br />
hazard quotient as practicable.<br />
Discharge of fluids, if required,<br />
will be carried out in a manner<br />
which will minimise<br />
environmental impact.<br />
All chemicals will be risk assessed<br />
as part of Offshore Chemical<br />
Regulations requirements and<br />
reported in PON 15C.<br />
Use of chemicals will be kept to a<br />
minimum & will be of as low a<br />
hazard quotient as practicable<br />
Discharge of fluids, if required,<br />
will be carried out in a manner<br />
which will minimise<br />
environmental impact<br />
Wastes will be minimised by use<br />
of appropriate procurement<br />
controls.<br />
All wastes to be properly<br />
segregated for recycling /disposal<br />
onshore.<br />
Waste will be dealt with in<br />
accordance with regulatory<br />
requirements.<br />
The installation vessels will be<br />
present for as short a time as<br />
possible.<br />
Other users of the sea area will be<br />
notified of the vessel presence<br />
and vessel movements<br />
Appendix B ‐ <strong>Environmental</strong> Assessment<br />
Rapid dispersion and<br />
dilution will occur in close<br />
proximity to the discharge<br />
point. Low impact.<br />
Water based hydraulic<br />
fluid that has will rapidly l<br />
disperse in close<br />
proximity to the discharge<br />
point. Low impact.<br />
Contribute to pressures<br />
on land based waste<br />
disposal. Balloch<br />
associated wastes<br />
predicted to have a Low<br />
impact.<br />
Only a temporary physical<br />
obstruction to other sea<br />
users.<br />
Low impact.