Updated March 2017.

1. Project Timeline

Q. What is the proposed timescale for the project?

2. Planning Process & Application

Q. What is the planning process for the project?

3. Consultation & Communications

Q. How can I contact the Project Team with feedback or questions?

Q. What is non-statutory consultation?

Q. Will there be future public consultations for the GDD project?

Q. You have now received over 30,000 submissions since the project started in 2011. How have you changed the original proposals to reflect community feedback?

Q. Does the GDD consultation process comply with the Aarhus Convention?

Q. Can the project information be provided in other formats, such as Braille?

Q. I have never seen or visited a modern wastewater treatment plant – is there an opportunity for me (or my organisation/committee) to see one for myself (ourselves)?

4. Why Do We Need New Regional Wastewater Treatment?

Q. Why do we need the GDD project?

Q. What is the Greater Dublin Strategic Drainage Strategy (GDSDS)?

Q. What is the Water Services Strategic Plan (WSSP)?

Q. What will be treated in the GDD WwTP?

Q. Where will wastewater originate?

Q. Why don’t you upgrade existing WwTPs?

Q. Why not provide several smaller facilities instead of a regional WwT plant?

5. Wastewater & Wastewater Treatment

Q. What is wastewater?

Q. Why do we need to treat wastewater?

Q. How is wastewater transported to a treatment plant?

Q. How is wastewater treated?

Q. Where can I learn more about the wastewater treatment process?

Q. What determines the level of treatment required?

Q. What is population equivalent and how is it determined?

Q. What will the proposed Clonshagh (Clonshaugh) plant look like?

Q. Will the proposed new regional wastewater plant will be the largest in the country?

Q. Why is Clonshagh (Clonshaugh) the Preferred Site Option?

Q. How was Clonshagh (Clonshaugh) chosen as the Preferred Site Option?

Q. Will the WwTP be expanded post-2040 to deal with growth in Dublin as part of this proposal?

Q. What will happen if there is a leak or if the pumps malfunction or something else breaks down at the plant?

Q. Can you guarantee that WwTP will be operated correctly?

6. Traffic

Q. What are the estimated traffic volumes at the proposed wastewater treatment plant?

Q. Will traffic be a problem in the area while the plant is being constructed and operated?

7. Sludge treatment and output

Q. How will sludge be treated in the proposed GDD WwTP?

Q. What are Biosolids?

Q. What quantity of biosolids will be produced at GDD?

Q. Where will the biosolids be stored after treatment?

8. Clonshagh (Clonshaugh) Community

Q. Will community gain be built into the project?

Q. Will the construction and operation of the proposed Wastewater Treatment Plant at Clonshagh (Clonshaugh) lower the value of our homes?

Q. How are you assessing the impact on the community?

Q. Have you considered health risks associated with facilities of such a scale?

9. Abbotstown (Blanchardstown) Pumping Station and Related Issues

Q. Why is a pumping station required for Abbotstown (Blanchardstown)?

Q. Where will the proposed Abbotstown (Blanchardstown) pumping station be located?

Q. Will the pumping station affect the Hospital?

Q. Have alternative solutions been considered?

Q. Why are four wastewater storage tanks being built in the grounds of Connolly Hospital?

10. Pipeline Route / Orbital Sewer

Q. What is the length/distance of the pipeline route and where will it start and end?

Q. Are there other proven examples of lengthy wastewater pipelines, such as is proposed for GDD?

11. Portmarnock / Baldoyle

Q. How will the project affect Portmarnock Beach and why?

Q. How far below sea level will the outfall pipe be?

Q. Will the construction of the pipeline have an impact on the Rockabill to Dalkey Island cSAC?

Q. Will construction of this outfall pipeline impact harbour porpoises?

Q. Will the treated wastewater be continuously delivered to the outflow discharge point?

Q. Why is a pumping station proposed for Grange (Dublin 13)?

12. Environmental Surveys and Assessments

Q. What is an Environmental Impact Statement (EIS)?

Q. How does the new EU Environmental Impact Assessment Directive impact GDD?

Q. In summary what are the key changes relating to the information required to be contained in the EIS?

Q. What are the implications for the Greater Dublin Drainage Project?

Q. What is an appropriate assessment and why is it required?

Q. Who carries out the Appropriate Assessment (AA)?

Q. What is a Natura Impact Statement (NIS)?

Q. Why did GDD apply for a Foreshore Licence?

Q. What is a Marine Ground Investigation (GI) survey and why is it needed?

Q. Will making a borehole on Velvet Strand, Portmarnock mean that the beach will close to the public?

Q. How deep and wide will the boreholes be?

Q. What is an underwater noise survey and why is it required?

Q. What is reef habitat mapping and why is it needed?

Q. What is a bathymetry and sub-bottom profiling survey?

Q. What is a surface sediment survey and why is it needed?

Q. What is an archaeological geophysical survey?

Q. What is a marine tide and current survey, and why is it required?

Q. Who will be carrying out the marine tide and current survey and how long will it take?

Q. What work will be carried out during the marine tide and current survey?

Q. What is an acoustic Doppler current profiler and what does it look like?

Q. What is a drogue tracking survey, how long will it last and what may we expect to see?

Q. What is a dye trace survey and what may be visible to water users?

Q. Why is a marine mammal survey required and what will it involve?

Q. How long will the marine mammal survey take and what activity can we expect to see in the area?

Q. What is the aim of the mammal survey and what type of monitoring will be carried out?

Q. What is Passive Acoustic Monitoring and what can I expect to see while this survey is being carried out?

Q. What is turbidity monitoring and why is it required?

Q. What is the importance of the Rockabill to Dalkey Island cSAC?

Q. Dublin Bay has recently been designated as a UNESCO Biosphere Reserve. What implications does this designation have for the GDD project?

Q. What is a 3D Hydrodynamic Model and how is it used?

Q. How are you assessing the impact on the community?

13. Environment, Agriculture & Tourism

Q. How will this project impact the environment, marine life and beaches?

Q. What odour issues are associated with a wastewater treatment plant of this size?

Q. Will there be any harmful emissions or chemicals discharged into the air from the WwTP?

Q. Are the prevailing winds being considered?

Q. Will flies or mosquitoes be a problem?

Q. Will there be backwash onto local beaches? Are tidal surges being considered?

Q. Are there EU guidelines that must be considered for the proximity of WwTPs to residential areas?

Q. What will be the impact to the coast if flooding occurs – will untreated wastewater be discharged?

Q. How will rainfall run-off from the WwTP be managed?

Q. Will the project impact tourism – our coastline in Fingal is key to our tourism industry?

Q. How are you addressing the impact on agriculture and horticulture?

14. Construction

Q. How will construction impact the area?

15. Other Wastewater Treatment Plants

Q. When was the most recent wastewater treatment plant constructed in Ireland?

Q. Ringsend WwTP – we’ve heard a lot about odours there – how are they being managed?

Q. Can the Ringsend WwTP be expanded instead of building this proposed plant?

Q. How are business and industries regulated in relation to releasing chemicals into the orbital pipeline?

16. Project Cost, Finance and Management

Q. What is the total cost of the project?

Q. What is Irish Water’s role in GDD?

Q. What role, if any, does Fingal County Council have now that Irish Water has taken over the GDD project?

Q. Is Irish Water investing in any other projects?

Q. How are business and industries regulated in relation to releasing chemicals into the orbital pipeline?

Q. Where can I find out more about Irish Water and its plans?