Post on 29-Dec-2015
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Background to this Proposal
1990 Members of DCC Unanimously Agreed:
Discharge of effluent & Plant would be sited outside the Lough regardless of level of treatment.
1996 Modelling Study:
DCC stated that the sewage loading must receive a high standard of treatment & that the outfall must lie outside the entrance to Lough Foyle.
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Relevant Reports
The Nov. 2004 Preliminary Outfall Report
Compared 2 outfall site; Carnagarve & Portavela
January 2005 Site Selection Report
Compared 3 sites; Breda Glen, Carnagarve & East of Greencastle
Relationship Between 04&05 Reports
2004 Outfall Report
2005 Site Selection Report
EIS
Conclusions
Conclusions
INPUT
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How Reports Influenced Each Other
Authors of 2004 Outfall Report were made aware that...
Site A at Moville had been eliminated on economic grounds.
(And more importantly)
That JB Barry would be recommending Site B at Carnagarve in their forthcoming 2005 Site Selection Report.
.
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2004 Outfall Report
“Following a detailed technical, environmental and economic evaluation of these sites JBB recommended site B, approximately midway between Moville and Greencastle as the preferred site for the new wastewater treatment works”
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Other Influences on the Outfall Report
“Donegal County Council has indicated that they consider the beaches around the Golf Course to be important recreational assets…”
Photo
Input of DCC into Outfall Selection Report is significant and inappropriate
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Other Influences on the Outfall Report
“Donegal County Council has indicated that they consider the beaches around the Golf Course to be important recreational assets…”
“The potential impacts on the small pocket beaches around both of the outfall locations under consideration are likely to be similar therefore any preference between the two locations will depend on the relative significance DCC attaches to the two beaches”.
Run
Input of DCC into Outfall Selection Report is significant and inappropriate
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2004 Outfall Report – Water Quality
(Outfall at Carnagarve)
Have insignificant impact on southern coastline
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2004 Outfall Report – Water Quality
A short outfall discharging secondary treated effluent at Carnagarve poses “a significant risk that the guideline limits of the bathing waters directive could be exceeded along the shore where there is a public car park and costal walkway”.
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Water Quality in 2004 Outfall Report
“There is significant potential for sewage discharge in this area to impact on shellfish operations in Lough Foyle if the process and outfall are not designed correctly”
However this impact “is likely to be less than that of the present untreated wastewater discharges from Moville”
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Conclusion of the 2004 Outfall Report
“…there is very little to differentiate between the two sites in terms of either marine construction or water quality issues. The slight advantage of site C in terms of potential impact on shellfish operations is balanced by slight advantage in terms of construction afforded to site B due to its more sheltered nature”.
Run
One of the final statements in the conclusions of this report states that…
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Outfall B1 at Greencastle
No outfall outside the Lough included in EIS EIS has no real outfall alternatives The two outfall locations in EIS driven by plant
location. Finding the optimum outfall was never a priority
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Why Include Outfall B1
It is accessible from the Carnagarve site To give the EIS the facade of completeness B1 is closer to sites outside the Lough B1 adds an additional €.5m to the Carnagarve
costs Carnagarve more expensive than processing
and discharging outside Lough Inappropriate alternatives to present to ABP
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Carnagarve Outfall Restriction
Current outfall location is restricted to 300m Same restriction doesn’t apply elsewhere Previous modelling outside Lough at 600m Previous modelling off Moville at 600m Mixing zone at end of outfall pipe Carnagarve mixing zone near beach & over
shellfish beds Carnagarve has onshore drift Whatever is in mixing zone will come ashore
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Ammonia Modelling
Ammonia is detrimental to fish life. No modelling for ammonia undertaken. So why was ammonia ignored in the EIS?
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Previous Modelling
Previous studies included ammonia modelling
“Total ammonia concentrations are expected to exceed the guideline level for salmonid fish in the area between the outfall and the coast”
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Outcome of this Analysis
Long term strategy not evident No attempt to find the optimum outfall No real consideration for the Lough as the
most important resource in this area Openness & partnership not widely displayed No realisation of the effects this project had