environmental impact statement kilmainhamwood compost facility ...

5361- Kilmainhamwood Compost Facility Extension- EIS
wells were recorded to the north within the townland of Ballynaclose. Bedrock was not encountered
within the dug wells.
No known karst feature is recorded in the GSI karst databases within a 2km radius search of the site.
Gypsum (hydrated calcium sulphate) is similar to limestone in so far as it undergoes karstification.
Gypsum shows little evidence of karst features in Ireland. The site and surrounding areas are overlain
by substantial deposits of clay rich till material, thereby limiting the potential development of karst
features.
Site Investigation data
Site-specific intrusive investigations were undertaken within the site. Records of all ground conditions
were maintained during this exercise. Site investigations comprising three boreholes were undertaken
by Southern Pumps Limited on behalf of McGill Environmental Ltd at the subject site in March 2003.
See Appendix 7.1
Rotary drilling of boreholes (BH 1, BH2 and BH3) were completed in bedrock. The overburden
encountered in BH1 – BH3 was greater than 10 metres deep, underlain by gypsum/anhydrite.
Groundwater levels measured in 2009 indicated groundwater levels within the bedrock were >16 mbgl.
The depth to bedrock in the surrounding areas is greater than 10m.
8.5 CHARACTERISTICS OF THE PROPOSED DEVELOPMENT
The proposed development consists of an extension of an existing composting facility. The current
application proposes to extend the existing facility buildings in order to provide sufficient processing
capacity. It is proposed to construct a 38m x 25m extension on the southwest side of the existing facility
and an extension 39m x 30m on the northeast side of the existing facility.
For inspection purposes only.
Consent of copyright owner required for any other use.
The proposed volume of discharge from the proposed surface water system to the existing drainage
ditch will be restricted to 13.54 l/s (the calculated 1 year green field runoff rate). This will be achieved by
the provision of surface water attenuation infrastructure on site. It should be noted that the provision of
surface water attenuation for the entire facility (surface water from the existing facility is currently not
attenuated) will reduce and control the discharge rate to the drainage ditch during storm events.
Water Supply
Water for the facility is provided by a combination of a pumped borehole (BH3) and a rainwater storage
tank. The water usage at the site is considered low. Kilmainhamwood Compost Facility is not connected
to the local water mains supply. Water usage at the composting facility is only required for the washing
of trailers, equipment and floors.
Water for washing will be utilised from the rainwater storage tank, the composting process will not place
any demand on the onsite borehole. No water is used in the composting process as the incoming
material contains excess moisture.
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