1. Water Quality

S 6.8 and EM&A Manual

The contractor(s) will ensure that the works cause no visible foam, oil, grease, litter or other objectionable matter to be present in the water within and adjacent to the area of marine works.

During Construction

Contractor(s)

ü

-

S 6.8

Control and monitoring systems will be used to alert the crew to leaks or any other potential risks.

During Construction

Contractor(s)

ü

-

S 6.8

All plant will be fully serviced and inspected before use to limit any potential discharges to the marine environment

During Construction

Contractor(s)

ü

-

S 6.8

Avoid spillage of oil, fuel and chemicals from structures by adopting appropriate good site practices

During Construction

Contractor(s)

ü

Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes

S 6.8

Any grout used would conform to the relevant environmental standards.  In addition, the adoption of appropriate operational management by the contractor should lead to low potential for leakage during the pumping phase.

During Construction

Contractor(s)

ü

-

S 6.8

No debris shall be willingly discharged to sea.  However, should debris be placed on the seabed, this will be removed (wherever practicable)

During Construction

Contractor(s)

ü

-

2. Waste Management

S 7.6

The Contractor shall prepare and implement a Waste Management Plan which incorporates site-specific factors, such as the designation of areas for the segregation and temporary storage of reusable and recyclable materials.

Contract mobilisation / During Construction

Contractor(s)

ü

-

S 7.6

The Contractor shall ensure only licensed waste collectors are used to collect chemical waste for delivery to a licensed treatment facility

Contract mobilisation / During Construction

Contractor(s)

ü

Waste Disposal (Chemical Waste) (General) Regulation

Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes

S 7.6

The Contractor shall apply for and obtain the appropriate licenses/permits for the disposal public fill and chemical waste.

Contract mobilisation / During Construction

Contractor(s)

ü

Waste Disposal (Chemical Waste) (General) Regulation

Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes

Waste Disposal (Charges for Disposal of Construction Waste) Regulation

S 7.6

EM&A of waste handling, storage, transportation, disposal procedures and documentation through the site audit programme shall be undertaken.

During Construction

ET

ü

-

3. Marine Ecology

S 9.12.2

The vessel operators will be required to control and manage all effluent from vessels.

During Construction / Marine works

Contractor(s)

ü

-

S 9.12.2

A policy of no dumping of rubbish, food, oil, or chemicals will be strictly enforced.  This will also be covered in the contractor briefings.

During Construction / Marine works

Contractor(s)

ü

-

S 9.12.3

Vessel operators working on the Project construction or operation will be given a briefing, alerting them to the possible presence of marine mammals in the area, and guidelines for safe vessel operations in the presence of cetaceans.  If high speed vessels are used, they will be required to slow to 10 knots when passing through a high density dolphin area.

During Construction / Marine works

ET & Contractor(s)

ü

-

S 9.12.3

The vessel operators will be required to use predefined and regular routes, as these will become known to porpoise using these waters.  This measure will further serve to minimise disturbance to marine mammals due to vessel movements

During Construction / Marine works

ET & Contractor(s)

ü

-

S 9.12.4

To reduce underwater sound levels associated with percussive piling, the following steps will be taken:

-         Quieter hydraulic hammers should be used instead of the noisier diesel hammers;

-         Acoustic decoupling of noisy equipment on work barges should be undertaken.

During Construction / Marine works

Contractor(s)

ü

-

S 9.12.4

Best practices are recommended to reduce the impacts to marine mammals:

-         Instigate ‘ramping-up’ of the piling hammer to provide an advance warning system to marine mammals in the vicinity;

-         Activities will be continuous without short-breaks and avoiding sudden random loud sound emissions

During Percussive Piling works for Foundation Construction

Contractor(s)

ü

-

S 9.12.4

An exclusion zone of 500 m radius will be scanned around the work area for at least 30 minutes prior to the start of percussive piling.  If marine mammals/sea turtles are observed in the exclusion zone, piling will be delayed until they have left the area.

During Percussive Piling works for Foundation Construction

ET

ü

S 9.15.1

Marine percussive piling works to be restricted to a daily maximum of 12 hours within daylight operations.

During Percussive Piling works for Foundation Construction

Contractor(s)

ü

4. Fisheries

S 10.7

The impacts to fisheries resources will be minimised by adopting the following measures:

-          The use of competent and experienced contractors and vessels operators;

-          Good planning of the installation sequence to avoid possible clashes;

-          Good promulgation of information relating to construction activities;

-          Thorough auditing of all vessels;

-          Observing good industry construction practices by the Contractors; and,

Marine Works / During Construction 

Contractor(s)

ü

-

S 10.7

Inform fishermen of possible developments of the Project in advance

Marine Works / During Construction 

Contractor(s) / Operator 

ü

-

S 10.7

Using good engineering practice, including the use of appropriately sized piles (smaller piles generate lower levels of underwater sound) and piling equipment.

Marine Works / During Construction 

Contractor(s)

ü

ü

-

S 10.7

Using ramp-up piling procedures. Blow frequency during this ramping up period should replicate the intensity that would be undertaken during full piling (e.g. one blow every two seconds) to provide cues for fish to localize the sound source.  Pile blow energy should be ramped up gradually over the ‘soft start’ period.

Marine Works / During Construction 

Contractor(s)

ü

-

S 10.7

The relevant authorities will be notified of activities in the wind monitoring mast area during construction activities, including dates of any works.  In addition, the Marine Department will be notified of the final location of the wind monitoring mast structures so that these can be updated on marine charts. 

Marine Works / During Construction 

Contractor(s)

ü

-

S 10.7

All vessels engaged in construction activities will be equipped with a Maritime VHF radio and an agreed frequency channel maintained. All vessels involved in the construction works will show the correct lights and shapes and ensure that all movements are promulgated through the Marine Department

Marine Works / During Construction 

Contractor(s)

ü

-

S 10.7

Consider the use of Guard Ship during the construction phase, particularly in periods of high activity. 

Marine Works / During Construction 

Contractor(s)

ü

-

S 10.7

A safety / exclusion zone of 500 m from any area of construction works will be established for all non-Project vessels.  The working area will be marked in accordance with Marine Department Notice No. 23 (2009). 

Marine Works / During Construction 

Contractor(s)

ü

-

S 10.7

Temporary lighting should be provided for incomplete structures during construction

Marine Works / During Construction 

Contractor(s)

ü

-

S 10.7

The wind monitoring mast should be marked according to the requirements of the Marine Department.  The precise marking arrangement will be agreed during the Detailed Design Phase.

Detail Design

Designer

ü

5. Landscape and Visual

S 11.7

Appropriate colours for the wind monitoring mast should be selected to reduce their visibility

Detail Design

Designer

ü

-

6. Cultural Heritage

S 12.8

No mitigation measures or EM&A is required for cultural heritage aspect of the Project.