Proposed Student Accommodation & Build to Rent Apartments at Punches Cross, Limerick City by Cloncaragh Investments Limited - Punches ...
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Punches Cross Development, Limerick. Civil Engineering Report. 1
Civil Engineering Report
Proposed Student Accommodation & Build to Rent Apartments at
Punches Cross, Limerick City
by Cloncaragh Investments Limited.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 2
CONTENTS
1. Introduction.
1.1 Extent of Proposed Development.
1.2 Liaison with Limerick City & County Council / Irish Water.
1.3 Topographical Survey.
2. Existing Drainage & Watermain Services.
2.1 Existing Foul Water Drainage Networks.
2.2 Existing Surface Water Drainage Networks.
2.3 Existing Watermains Network.
3. Proposed Site Drainage & Water Supply.
3.1 Proposed Foul Water Drainage.
3.1.1 Water Conservation.
3.2 Proposed Surface Water Drainage - Design.
3.3 Proposed Water Mains.
4. Technical Summary.
4.1 Stormwater & Foul Sewerage.
4.2 Predicted Impact of Development.
4.3 Remedial and Mitigation Measures.
4.4 References.
5. Appendix
McCusker Environmental – Asbestos Survey.
IGSL – Site Investigation Report.
Irish Water – Statement of Design Acceptance.
1 INTRODUCTION
The applicant, Cloncaragh Investments Ltd, proposes to construct a new student
accommodation complex including all associated facilities, underground carparking etc, at
the junction of Ballinacurra Road and Rossbrien Road, Limerick City. This Civil Engineering
Report addresses the design of the inground services necessary to service this proposed
development, i.e. watermains, storm and foul sewerage services. This report also deals
with the construction issues, construction methodology relating to the development.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 3
The development site extends to circa 0.77ha approximately. The site for several years
was used as a vehicle / car, sales and repairs commercial premises. The site also operated
for several years as a fuel filling station. Presently, the site is derelict and hoarded up.
The previous owners, Esso Ireland Ltd decommissioned much of the inground services
within the site which serviced the Filling station while in operation. Following this, Esso
Ireland Ltd engaged URS Ireland Ltd to carry out a closure report on the site. The entire
site has now been decommissioned and a detailed Closure Report for the entire site was
prepared by URS Ireland Ltd, of 410/411 Q House, 76 Furze Road, Sandyford, Dublin 18.
The site has remained unoccupied and derelict for several years, circa 8 years. The site
remains secure with the site boundaries enclosed with timber hoardings.
SLR Consulting Ireland has further completed the following reports in support of the
development, all of which are to be referenced while reading this report.
• Punches Cross GW Management Plan.
• Punches Cross Soil Management Plan.
• Appendix 01 Bulk Excavation.
• Appendix 02 – Basement Excavation Plan – Groundwater Control
Concept.
• Appendix 03 – Basement Excavation Phasing.
• Appendix A – Basement Excavation Plan.
• Appendix B – Waste Classification Assessment.
• Appendix C – Basement Excavation Phasing.
A site investigation report was completed by IGSL, (a copy of which is attached as an
appendix to this report).
An Asbestos Survey of the site was also carried out by McCusker Environmental Ltd,
(a copy of which is attached as an appendix to this report).
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 4
The preparation / presentation of this Civil Engineering Report has incorporated in full the
recommendations contained within the supporting documentation as presented by SLR
Consulting, IGSL and McCusker Environmental Ltd.
This report should be read in conjunction with these additional and supporting documents.
1.1 EXTENT OF PROPOSED DEVELOPMENT.
The proposed development consists of a 0.77ha area at the junction of Punches Cross,
between Ballinacurra Road to the South West and Rossbrien Road to the North East to
include;
(A) Demolition of an existing vacant derelict structures including basement area of
approx. 1,000m2
(B) A street-front building ranging in height from four storey plus recessed
penthouse along Ballinacurra Road and Rosbrien Road, culminating in a six storey
feature corner at Punches cross junction, for use as student accommodation,
including student communal facilities such as dining rooms, social activity rooms
suitable for Gym, Cinema/Games room, reception and social areas of 778m2 at
ground and first floor; Two ancillary retail units of 105.6m2 and 99m2 and 54
student apartments in arrangement of 3,4,5,and 6 bedroom configurations.
Overall area of building A is 9,028m2.
(C) A rear courtyard building ranging in height from 5 storeys plus penthouse to
seven storeys, containing 14 student apartments in 5 bedroom configuration; also
including 30 build-to rent apartments as follows – 10 no one bedroom apartments,
18 no. two bedroom apartments and 2 no. three bedroom apartments.
Overall area of building B is 5,330m2.
(D) A basement level containing social activity rooms suitable for yoga, aerobics and
general social use, laundry facilities, a total of 76 car spaces, designated for
apartments, staff and visitors, bicycle storage areas for 326 bicycles for students,
and 50 bicycles separately stored for apartments, ancillary refuse and maintenance
stores, sub-station and switch rooms and water storage tanks.
Overall area of basement is 5,061m2.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 5
(E) Ancillary courtyard gardens of 1,486m2, including 48 further surface bicycle
spaces, to serve as amenity for the student apartments and a separate rear
courtyard garden of 450m2 to serve as amenity for the build-to-rent apartments
development, with feature landscaping.
(F) Vehicular access and egress onto Ballinacurra Road and Rosbrien Road in a strict
controlled one-way arrangement to suit existing traffic flows.
(G) Building boundary set back along Rosbrien Road to provide additional traffic
lane for public use, and footpath for public use. Building also set back at corner of
Punches Cross to provide mini public plaza and provision for future public
subscription bicycle stands.
The total number of student apartments proposed is 68 containing 318 bedspaces.
The total number of build-to-rent apartments is 30, containing 104 bedspaces.
Overall building area at or above ground level is 14,358m2.
The application is accompanied by a Natura Impact Statement.
1.2 Liaison with Limerick City & County Council / Irish Water.
Analysis of the existing council services within the surrounding area of the development
site was undertaken to establish the capacity of the existing facilities, i.e. foul sewers,
storm water sewers and water supply to service the development. A series of site visits
were carried out on the neighbouring sites to observe the particular features of the area,
including the recently constructed “LIDL” development on the southern end of the site. In
addition, discussions were held with the Water Services Department of Limerick City &
County Council where the effects of this proposed development will have on the existing
council services were considered / discussed at length. Issues relating to the control of
stormwater and foul water disposal from the developed site and as highlighted in the City
& County Council Development plan were discussed at length. Consultations with
representatives of Irish Water were also made to ascertain the impacts that this proposed
development will have on Irish Water’s infrastructure.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 6 The design of the inground services for this development, i.e. Watermains, Foul and Stormwater sewers was completed following these series of consultations with representatives from Irish Water, and representatives from the water services department of Limerick City & County Council. The specific water services design criteria for new developments and as detailed in the Limerick City & County Council Development Plan was also referred to and has been complied with. It is further stated that the comments made by the Water Services Department of Limerick City & County Council in their submission to An Bord Pleanala; “Strategic Housing Development: Pre-Planning Consultation with An Bord Pleanála under Section 6 (9) of the Planning & Development (Housing) and Residential Tenancies Act 2016” has been complied with. Written confirmation from Irish Water that they have no objections to our proposals is attached as an appendix to this report. 1.3 Topographical Survey. A detailed topographical survey was carried out incorporating the development site and the surrounding roads. Where possible all existing manholes for sewers, (stormwater & foul) were accessed and levels taken. A full study of the commercial development on the “LI DL ” site east of the development was taken and particularly where the development might impact on this proposed development. Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 7 2.0 Existing Drainage & Watermain Services. 2.1 Existing Foul Water Drainage Networks. The previous water services within this brownfield site, incorporating foul sewerage disposal have been decommissioned. The proposed development will incorporate completely new systems for the supply of fresh water and for the disposal of foul sewerage, surface water drainage from the site development and these are fully detailed on our drawings and considered within this submission. 2.2 Existing Surface Water Drainage Networks. The existing services, watermains and existing stormwater network within the site has been decommissioned. In discussions with the water services department of Limerick City & County Council the current situation where stormwater from the newly developed LIDL site (on the southern end of the site) and from sections of the Ballinacurra housing estate pass through an open drain within the Catholic Institute Tennis & Hockey Club, (located just off Rossbrien Road) was discussed. It was agreed that the surface water discharge from this proposed Student Accommodation development at Punches Cross, Limerick City by Cloncaragh Investments Ltd will be discharged into the existing stormwater sewers located within the Ballinacurra road and which pass by the site. This decision was founded on the historical data which showed that this open drain within the Catholic Institute’s grounds was subjected to storm surging and flooding following heavy rainfall events. The surface water from this new / proposed development will also be attenuated with a maximum discharge from the development limited to 4 litres / sec and the design based on a 1/100-year rainfall event, (including an allowance for Climate Change). This design has been accepted by Limerick City & County Council. Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 8
2.3 Existing Watermains Network.
The existing watermains network within the site has been decommissioned. This proposed
development incorporates a new approach to the installation of a watermains system within
the site development and these are outlined and considered within this submission.
3.0 Proposed Site Drainage & Water Supply.
3.1 Proposed Foul Water Drainage.
The foul sewerage generated from the proposed development encompasses the following
sections of the site:
• Foul Waste from the toilets, showers, wash hand basins etc from both from the
bedroom blocks buildings, separate independent apartments and the ancillary shops
incorporated within the development.
• Enclosed Bin Storage area incorporating bins / skips.
The foul sewerage network will consist of a sealed gravity system. It will service this
development only. The proposed new foul sewerage system will extend from within the
development site and westwards to the side of the site, (Ballinacurra Road). The details of
this network layout are detailed in Drawing No’s:
18.104-1 Roof Downpipe & Ground Floor Level.
18.104-2 Basement Level – Storm & Foul Sewer Layout.
18.104-3 Ground Floor Level – Storm & Foul Sewer Layout.
18.104-4 Storm & Foul Sewer Longitudinal Sections.
It is proposed to discharge the foul sewerage within the basement section and the foul
sewerage from the ground floor and upper floors of the complete development in total into
the existing Irish Water foul-sewer located on the Ballinacurra Road. Refer to attached
drawings.
It is proposed that all foul water from the proposed development will be collected on site
via a series of sewerage network pipes. A suitable grease trap will be installed to service
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 9
all the ancillary commercial units’ washdown and deli areas, prior to discharge into the
proposed new foul sewerage network. As per the agreement with Irish Water the Basement
sewerage will be pumped into the existing IW sewers on Ballinacurra Road. Design
guidelines from the EPA have been used to estimate the peak foul water loading rates for
both the student accommodation and ancillary commercial units within the development.
The relevant design approach / data relating to the design of the foul sewerage disposal
from the site is as follows.
• 250 litres per person per day. (allowance includes waste from washing machines
etc).
• Total Number of beds; 430#.
• Allowance of 1,500 litres per day foul sewerage waste from the ancillary shop units
servicing the development.
Estimated Foul Discharge Rate.
Dry Weather Flow (DWF) = 430 x 250 + 1,500 litres = 109,000 Litres / day or 1.26
litres/sec.
The estimated peak Flow is (3xDWF) = 3.78 ltrs/sec.
Included in the design approach to the design of the foul sewerage disposal on site is the
recycling of roof rainwater storage for the supply of water to the toilets in all the bedroom
spaces.
The design of the foul sewerage systems servicing the proposed development has been
assisted by the co-operation of Irish Water and Limerick City & County Council engineers.
The following as-built information was provided to us by both Irish Water & Limerick City
& County Council. Irish Water has confirmed their acceptance of our design and this form
of acceptance is attached with this submission.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 10
Schematic Layout of Foul & Stormwater sewers surrounding the Proposed Development Site.
(information supplied by Irish Water / Limerick City & County Council)
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 11
3.1.1 Water Conservation.
Water conservation measures are included in the design of the water services systems for
the development. All the stormwater from the roofs will be stored in storage tanks for later
re-use in the supply of water to the toilets and in supplying water for the washing of the
internal courtyard surfaces etc. This is dealt with further in the section dealing with the
Stormwater design.
3.2 Proposed Surface Water Drainage - Design.
As per the City & County Development plan the disposal of surface water from the proposed
development will be attenuated. In complying with the Council’s Development objectives,
the following design criteria will be adopted.
- The surface water pipe network within the development is designed to cater for 1/5-
& 1/30-year rainfall return periods.
- Stormwater Attenuation has been incorporated within the design, whereby the
stormwater from the development will be attenuated based on a rainfall return period,
1/100 years. The rate of discharge from the site following a rainfall 1/100 period return
event will be 4 litres / sec maximum discharge. This rate of discharge was agreed with
the water services department of Limerick City & County Council. This discharge rate
also complies with the Limerick City & County Council Development Plan.
- The attenuated surface water is to be stored within two large concrete storage tanks
to be located within the basement area. The necessity for two storage tanks is due to
the ground floor slab levels having a finished floor level varying from 15.2m to 14.4m.
Each attenuation tank will have a flow control device, the accumulation of both will not
exceed 4 litres / sec.
- The attenuated stormwater will be discharged by gravity into the existing stormwater
sewers within the Ballinacurra Road, (all as detailed on the accompanying drawings -
18.104-2.)
- The stormwater generated within the basement shall be stored within an inground
storage tank and pumped periodically up into the attenuation storage tanks. All
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 12
basement generated stormwater will flow through a Class 1 oil interceptor prior to
discharge into the storage tanks etc.
- As a means of complying with the SUDS requirements, “Sustainable Urban Drainage
Systems” all rainwater from the roof areas will be discharged into storage tanks with
this water used for toilets, wash down areas etc.
The stormwater from the proposed development has been designed in accordance with
Limerick City & County Council Development Plan and the City of Dublin Sustainable
Drainage Systems, (CDSDS) and thus ensuring the best management practice has been
incorporated into the design. The disposal of storm water from site will be managed in two
distinct ways. The design approach / intent is to ensure that the disposal of storm water
from the developed site will, at a minimum, equate to the disposal of storm water from the
existing undeveloped brownfield site.
Rainwater Harvesting – Rainwater storage sourced from the Roof Areas - The storm water
from the roofs of the buildings and the courtyards will be fed directly into specially designed
storage tanks located within the basement. All rainwater will be harvested and used to
supply water to operate the skip / bin-wash facility, irrigate the grass areas within the
courtyards and supply water to the toilet cisterns within all the bedroom blocks. Both
operations will operate as closed systems. All excess water from the roofs and courtyards
will be discharged into the development’s storm water system attenuation tanks located
within the basement. The recycling of rainwater to service the toilets within the complex,
in addition to providing water to irrigate the plants and green areas generally within the
internal courtyard will contribute significantly in the reduction of the development’s usage
of fresh potable water.
Attenuation of Stormwater from the internal courtyard, the Basement Car Parking Area,
Roadway Entrance, building’s Roof Areas.
Surface water from within the basement car parking area, roadway entrances, internal
courtyard areas and excess rainwater from the roofs of the buildings will be fed via Class
1 silt traps and Full Retention interceptors into the storm water attenuation storage areas
to be located with the basement. The storm water attenuation area will be sized to ensure
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 13
that the maximum storm water discharge from the site will not exceed 4 litres/sec/hectare,
the council’s stipulated requirements.
The following design values will be incorporated within the design.
• Rainfall Historical Data sourced from Met Eireann for the Limerick City Region,
(Punches Cross).
• Rainfall Attenuation Design; Rainfall Return Period: 1/100 years + 20% capacity for
Climate change.
• Design of the stormwater sewer pipework; Rainfall Return Period; 1/5 years and
1/30 year for storm surge in pipework.
• Rainwater from the roof areas, internal courtyard and basement carpark to be
collected and stored in underground storage tanks to be re-used as water supplies
to service the facility’s toilets, courtyard irrigation and cleaning of bin / skip-yard.
Design Principles of the Storm Water Attenuation System.
From a surface water design aspect, the entire site area is considered to consist of an
impermeable surface finish. As such, the quantities of stormwater discharging from site is
to be considered to be greater than that from a similarly sized greenfield / brownfield site.
The total developed site area is approximately 7,600m2.
As per the Site Flood Report by JBA Consulting, the site is not subject to flooding or ground
water issues.
The design approach is to consider those areas where stormwater is generated, and which
needs to be discharged into the storm water network. As a means of minimising the flow
of stormwater from the development site into the existing council storm drain located on
the Ballinacurra Road, it is proposed to install 2# stormwater attenuation tanks and surface
water control flow devices attached to each attenuation tank. The maximum stormwater
permitted into the Ballinacurra Road stormwater sewer is limited to the quantity of surface
water expected to be generated within an undeveloped greenfield / brownfield site. As per
the Limerick City & County Council Development Plan, the discharge of stormwater from
the developed site is restricted to 4litres/second per Hectare. An additional 20% spare
capacity is allowed for to cater for climate change.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 14
The water conservation measures, the storing and re-cycling of grey water from the roof
areas within the development are excluded from this design assessment.
The design procedure developed by the UK I nstitute of Hydrology is also adopted to
quantity the permitted outflow. The following calculations are based on the research and
published documentation from the Institute of Hydrology of the UK, Report No.124.
QBAR = 0.00108 x (Area)0.89 (SAAR)1.17 (Soil)2.17
Where QBAR (m³/sec) is the mean peak flow, Area (km²) is the catchment, SAAR (mm) is
the standard Annual Average Rainfall and is a soil index with values in the range 0.15 –
0.5
Proposed Development Site Area: 6,200m²
Soil Index: 0.42
SAAR: 820mm
QBAR = 4.1 Litres/sec.
However, using the guidance from the Limerick City & County Council Development Plan a
QBAR discharge of 4 litres/sec will be adopted.
It is proposed to allow the discharge of 4 litres /sec into the existing open drains by
attenuating the storm water generated from the development. The volume of storm water
generated is based on a rainfall return period of 1/100 years, all storm data taken from
Met Eireann published records. The “Hydrobreak” rainwater control device will be located
downstream of the attenuation tanks.
Two stormwater storage tanks are proposed. These Tanks will be located within the
basement. Two are required so as to cater for the variation in the suspended ground floor
levels (in excess of 1.2m) and to ensure that the stormwater discharge from the southern
end of the site can be discharged into the storage tanks provided.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 15 The overall impermeable developed site area is circa 6,200m2. Each Attenuation Tank will have a Hydrobreak flow control valve located downstream of the flow which will limit the flows from the tanks, i.e. Tank A: 2.5 lts/ sec , Tank B: 1.5 lts/ sec. Stormwater Tank A will cover a site area of approximately 3,400m2. In addition, this stormwater storage Tank will accommodate the pumped water from the inground basement tank (60m3), which will cater for the surface water within the enclosed basement and the water generated from a car fire event, and / or where the watermains for the development need to be flushed out etc. In summary, storage Tank A: Capacity: 300m3. This tank is located at the northern corner of the site adjacent to the junction of Ballinacurra Road and Rossbrien Road. Storage Tank B: Capacity: 190m3. This tank is located at the western corner of the site on the Ballinacurra Road. All stormwater from the development will pass through Class 1 Full Retention Petrol interceptors prior to entering into the storage tanks. Each of the storage tanks, A & B will be connected to a Hydrobreak value downstream of the tank which will control the flow of stormwater from the development. The need to provide two individual “Hydro-break” control valves is to ensure that all stormwater flow from the development is controlled prior to leaving the site and discharging into the council mains. In addition to the 2# stormwater attenuation storage tanks, an inground water storage tank is proposed for the basement. This water storage tank is to cater for the discharge of surface water from within the basement and from the basement ramp areas. Furthermore, this inground basement storage tank is designed to cater for the storage of water which will be generated in the event of a car fire within the basement and or where the water within the watermains for the development needs to be flushed out. All basement surface water will enter the inground water storage tank via a Class 1 full retention petrol interceptor. Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 16
The size of the inground stormwater storage tank is 5.5m x 18.2m x 0.6m deep = 60m3.
This storage volume is sufficiently sized to cater for the water storage capacity of two fire
engines, (circa 25m3 of water) in addition to the discharge of any stormwater from within
the basement surface. The treated / filtered & stored groundwater will be periodically
pumped up into the Stormwater storage Tank A for ultimate controlled discharge into the
council mains on Ballinacurra Road.
Stormwater Tank A.
STORAGE VOLUME.
Pump-out rate from system = 2.5 litres/sec.
100 Year Storm Event.
Storm Av. Total Imp. Area Total Run Empty Amount Storage
Duration Rainfall Rainfall Off Rate Per Emptied Volume
Intensity 100 Years Day over Storm Req’d
Period
days mins mm/hr mm ha m3 m3/d m3 m3
0.003 5 217 18.1 0.34 62 345 0.75 62
0.007 10 151 25.2 0.34 86 345 1.50 85
0.010 15 119 29.7 0.34 101 345 2.25 99
0.021 30 69 34.7 0.34 118 345 4.50 114
0.042 60 41 40.5 0.34 138 345 9.00 129
0.083 120 24 47.4 0.34 161 345 18.00 153
0.167 240 14 55.3 0.34 188 345 36.00 152
0.250 360 10 60.6 0.34 206 345 54.00 151
0.500 720 6 70.8 0.34 241 345 108.00 133
1.000 1440 4 82.7 0.34 281 345 216.00 65
2.000 2880 2 92.1 0.34 315 345 432.00 -
Amount of Storage required for stormwater generated: 152m³ + 20% for Climate
Change.
Total Storage Volume required = 152m3 + 31m3 = 183m3
In-addition, the total basement stormwater storage capacity is added to Tank A. The
resultant storage capacity of Tank A: = 183m3 + 60m3 = 243m3. A Storage Tank of 300m3
is provided.
Stormwater Tank B.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 17
STORAGE VOLUME.
Pump-out rate from system = 1.5 litres/sec.
100 Year Storm Event.
Storm Av. Total Imp. Area Total Run Empty Amount Storage
Duration Rainfall Rainfall Off Rate Per Emptied Volume
Intensity 100 Years Day over Storm Req’d
Period
days mins mm/hr mm ha m3 m3/d m3 m3
0.003 5 217 18.1 0.28 50 130 0.45 50
0.007 10 151 25.2 0.28 71 130 0.90 70
0.010 15 119 29.7 0.28 83 130 1.35 82
0.021 30 69 34.7 0.28 97 130 1.70 95
0.042 60 41 40.5 0.28 113 130 3.40 110
0.083 120 24 47.4 0.28 133 130 6.80 126
0.167 240 14 55.3 0.28 155 130 13.60 141
0.250 360 10 60.6 0.28 170 130 27.20 143
0.500 720 6 70.8 0.28 198 130 54.40 144
1.000 1440 4 82.7 0.28 232 130 108.40 124
2.000 2880 2 92.1 0.28 258 130 116.80 142
Amount of Storage required for stormwater generated: 143m³ + 20% for Climate
Change.
Total Storage Volume required = 143m3 + 30m3 = 173m3. A Storage Tank of 190m3 is
provided.
The above stormwater attenuation design guarantees that the surface water discharge
from the site will not exceed 4litres/second over a rainfall event equivalent to a 1/100
rainfall return period.
Notes:
To be read in conjunction with
1. Drawing Nos:
18.104 - 1 Roof Downpipe & Ground Floor level Stormwater Drainage
18.104 - 2 Layout.
18.104 - 3 Basement Level – Storm & Foul Sewer Layout.
18.104 - 4 Ground Floor Level – Storm & Foul Sewer Layout.
Storm & Foul Sewer Longitudinal Sections.
2. Rainfall data for 100-year storm from Met Eireann Office Records for Limerick City.
3. Max discharge from system to be regulated by Hydrobreak flow control device.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 18 4. Benefits from water conservation measures are excluded from calculations. 5. 100% of site area is considered as impermeable. Design of Stormwater Pipework. (R efer to draw ing 18.104 – 3 & Design Sheet & attached schem atic 181-104-10) The stormwater network of pipework servicing the management of the stormwater generated within the development from ground floor upwards will be suspended beneath the ground floor slab, (within the basement) and will direct all the stormwater from the development into the stormwater attenuation tanks. These stormwater pipes are all sized to cater for a 1/30-year storm event as per the Limerick City & County Development Plan. Attached are the details of the design. The rainfall data is sourced from Met Eireann. The storm sewers in the basement are designed to specifically remove the rainwater from the access and exit ramps, the water from a fire engine truck, (in case of fire) and to cater when the water in the watermains has to be washed out etc. Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 19 The layout of the stormwater sewers fixed to the underside of the ground floor concrete slab. This layout is to be read in conjunction with the sewer spread sheet attached. Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 20
Met Eireann.
Return Period Rainfall Depths for sliding Durations Irish Grid: Easting: 156998, Northing: 155581, - Punches Cross Development.
Interval | Years
DURATION 6months, 1year, | 2, 3, 4, 5, 10, 20, 30, 50, 75, 100, 150, 200, 250, 500,
5 mins 2.7, 3.9, | 4.6, 5.6, 6.4, 6.9, 8.8, 11.1, 12.6, 14.7, 16.6, 18.1, 20.5, 22.3, 23.9, N/A ,
10 mins 3.7, 5.4, | 6.4, 7.9, 8.9, 9.7, 12.3, 15.4, 17.5, 20.5, 23.1, 25.2, 28.5, 31.1, 33.3, N/A ,
15 mins 4.3, 6.4, | 7.5, 9.3, 10.4, 11.4, 14.5, 18.1, 20.6, 24.1, 27.2, 29.7, 33.6, 36.6, 39.1, N/A ,
30 mins 5.6, 8.1, | 9.5, 11.5, 12.9, 14.0, 17.6, 21.7, 24.5, 28.4, 32.0, 34.7, 39.0, 42.3, 45.0, N/A ,
1 hours 7.3, 10.3, | 11.9, 14.3, 15.9, 17.2, 21.4, 26.1, 29.2, 33.6, 37.5, 40.5, 45.2, 48.8, 51.9, N/A ,
2 hours 9.4, 13.0, | 14.9, 17.8, 19.7, 21.2, 25.9, 31.3, 34.8, 39.7, 44.0, 47.4, 52.5, 56.4, 59.7, N/A ,
3 hours 11.0, 15.0, | 17.1, 20.2, 22.3, 23.9, 29.0, 34.8, 38.5, 43.8, 48.3, 51.9, 57.2, 61.4, 64.8, N/A ,
4 hours 12.2, 16.5, | 18.8, 22.1, 24.3, 26.0, 31.5, 37.5, 41.4, 46.9, 51.7, 55.3, 60.9, 65.2, 68.7, N/A ,
6 hours 14.2, 19.0, | 21.5, 25.1, 27.5, 29.4, 35.3, 41.7, 45.9, 51.7, 56.7, 60.6, 66.4, 70.9, 74.6, N/A ,
9 hours 16.5, 21.8, | 24.5, 28.5, 31.1, 33.1, 39.5, 46.4, 50.9, 57.0, 62.3, 66.4, 72.5, 77.2, 81.0, N/A ,
12 hours 18.4, 24.1, | 27.0, 31.2, 34.0, 36.1, 42.8, 50.1, 54.7, 61.1, 66.6, 70.8, 77.1, 81.9, 85.9, N/A ,
18 hours 21.4, 27.7, | 30.8, 35.4, 38.5, 40.7, 47.9, 55.7, 60.6, 67.3, 73.1, 77.5, 84.1, 89.2, 93.3, N/A ,
24 hours 23.8, 30.5, | 33.9, 38.8, 42.0, 44.4, 51.9, 60.0, 65.2, 72.1, 78.1, 82.7, 89.5, 94.7, 98.9, 113.1,
2 Days 30.5, 38.0, | 41.8, 47.0, 50.5, 53.0, 61.0, 69.3, 74.6, 81.6, 87.6, 92.1, 98.9, 103.9, 108.0, 121.7,
3 Days 36.3, 44.6, | 48.6, 54.3, 57.9, 60.6, 69.0, 77.7, 83.2, 90.4, 96.6, 101.2, 108.0, 113.1, 117.2, 131.0,
4 Days 41.6, 50.5, | 54.9, 60.9, 64.7, 67.6, 76.4, 85.5, 91.1, 98.6, 104.9, 109.6, 116.6, 121.7, 125.9, 139.8,
6 Days 51.5, 61.5, | 66.3, 73.0, 77.2, 80.3, 89.8, 99.6, 105.5, 113.5, 120.1, 125.0, 132.3, 137.7, 142.0, 156.3,
8 Days 60.8, 71.7, | 76.9, 84.1, 88.7, 92.0, 102.1, 112.5, 118.8, 127.1, 134.0, 139.1, 146.7, 152.2, 156.7, 171.4,
10 Days 69.6, 81.4, | 87.0, 94.7, 99.5, 103.0, 113.7, 124.6, 131.2, 139.8, 147.0, 152.4, 160.1, 165.9, 170.5, 185.6,
12 Days 78.1, 90.7, | 96.7, 104.8, 109.8, 113.6, 124.8, 136.1, 143.0, 152.0, 159.4, 164.9, 172.9, 178.8, 183.6, 199.0,
16 Days 94.6, 108.7, | 115.2, 124.1, 129.6, 133.7, 145.8, 158.0, 165.3, 174.9, 182.8, 188.6, 197.0, 203.2, 208.2, 224.3,
20 Days 110.7, 125.9, | 133.0, 142.6, 148.5, 152.8, 165.8, 178.7, 186.4, 196.5, 204.8, 210.9, 219.7, 226.2, 231.3, 248.0,
25 Days 130.3, 147.0, | 154.6, 164.9, 171.3, 176.0, 189.8, 203.5, 211.7, 222.3, 231.0, 237.4, 246.6, 253.4, 258.7, 276.1,
NOTES:
N/A Data not available
These values are derived from a Depth Duration Frequency (DDF) Model For details refer to:
’Fitzgerald D. L. (2007), Estimates of Point Rainfall Frequencies, Technical Note No. 61, Met Eireann, Dublin’,
Available for download at www.met.ie/climate/dataproducts/Estimation-of-Point-Rainfall-Frequencies_TN61.pdf
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 21 Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 22
Flooding.
All matters relating to flood risk with this development site are dealt with separately by JBA
Consulting on separate cover. However, referencing the flooding potential for the site and
as prepared by JBA Consulting it can be seen that the site is well positioned above the
nearest flood risk area and is not at risk of any possible site flooding due to weather events.
The latest flood maps available from the website www.floodinfo.ie shows that the proposed
development site is significantly away from the nearest flood potential lands.
Extract from floodinfo.ie detailing the nearest potential flood areas
in and around the location of the proposed development.
Proposed Development site shaded in Red.
Flood Risk Lands identified in floodinfo.ie
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 23
Basement Stormwater storage system.
The basement reinforced concrete water storage tank is located as per the basement
drawings. A storage volume, 5.5m x 18.2m x 0.6m deep = 60m3 is available for basement
surface water storage and surrounding areas.
Note, all surface water entering the basement storage tank enters via a Class 1 full
retention separator.
The purpose of the basement stormwater storage tank is to cater for a number of
scenarios.
• Removal of the surface water runoff from the access roads into the basement
carpark,
• Removal of the water from the flushing out of the watermains servicing the
development located within the basement.
• Removal of the water used by the fire brigade in the event of a car fire within the
basement.
The basement water storage tank has been sized to cater for these events. The surface
water from the basement storage tank flows by gravity to an adjacent sump and the water
is pumped up into the stormwater storage Tank A for storage and controlled discharge into
the public stormwater pipe.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 24 Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 25 3.3 Proposed Watermains An existing 300mm diameter Watermain runs along the Ballinacurra Road adjacent to the site which will be used to provide water to the site. This watermain is in the ownership of Irish Water and the details of this watermain is provided on a drawing attached to the appendix. (R efer to Draw ing 18104-5 ) It is proposed to extend a 150mm diameter watermains into the development. A single bulk. “pulse” type water meter will be fitted onto the watermains network to measure all freshwater entering the development. An internal fire mains and block rising fire mains will be installed to service the development all as per Part B Technical Guidance Document of the Building Regulations. All design will also comply with the requirements of Irish Water. Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 26
Schematic
of existing
Watermains as supplied by Limerick City & County Council / Irish Water.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 27
4.0 Technical Summary.
4.1 STORMWATER & FOUL SEWERAGE.
The approach taken in the design of the disposal of the foul sewerage and surface water
generated on the developed site is to ensure that the proposal complies with the Limerick
City & County Council Development plan and the requirements of Irish Water. In this regard
it has been essential to demonstrate to both Irish Water & Limerick City & County Council
that gravity sewer mains (Stormwater & Foul Sewerage separate systems) servicing the
development can be constructed and connected to the existing mains systems (and subject
to planning permission) and in such a manner which will allow for sustainable development
in accordance with the City & County Development plan etc. Furthermore, it has been
possible to obtain data on the existing inground services under the ownership and control
of Irish Water / Limerick City & County Council which has allowed us to develop our design
in a practical way.
It has also been established that the development and the surface water and foul sewerage
discharges from the development will be free from any effects of flooding events due to
the site being located on a level considerably higher than the flood zones mapped and
identified within the Flood Report by JBA Consulting.
The following key design factors have also been considered and allowed for in the
developed site surface water and foul sewerage disposal design process;
i. Allowance in the stormwater disposal design to cater for a rainfall return event of 1
in 100-year rainfall event including an allowance for Climate Change.
ii. Ensure that the surface water discharging from the developed site is controlled such
that the rate of disposal of stormwater from the developed site is in accordance with
the Limerick City & County Council Development Plan, i.e. 4 litres per second.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 28
iii. Ensure that the surface water discharging from the developed site passes through
full retention class 1 oil interceptors prior to discharge from the site.
iv. Ensure that the pathway for the discharged stormwater is well defined and that the
resultant development does not cause or result in a flood risk to adjoining lands,
developed or otherwise.
v. Ensure that only the surface water from “clean areas” within the developed site,
discharge into the stormwater discharge system and that the stormwater from any
contaminated areas of the site, waste bin locations discharge into the site sewers.
vi. Ensure that all the rainwater from the roofs of the Buildings are channelled into
storage attenuation storage tanks. The stored rainwater is to be used to service the
toilets in all blocks and for irrigating the green areas within the courtyard. The used
water is in turn to be re-cycled where possible to allow the system to be as efficient
as possible.
vii Inspection manholes will be constructed throughout the site to allow for periodic
sampling of the waste waters from the development to ensure that all wastewater
is within the limits set by Irish Water.
viii The storm sewers within the development have been designed to cater for 1/30-
year storm events and in accordance with Limerick City & County Development plan.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 29 4.2 PREDICTED IMPACT OF DEVELOPMENT Demolition & Removal of Existing Buildings. This proposed development will result in the demolition of the existing buildings which are of the order of 50 – 60 years old. Whereas, and as stated in the Asbestos Report there is very little evidence of asbestos on site, this proposed development will allow for the full removal of any asbestos found on site in a safe and thorough way. The condition of the existing buildings is such that the roof structure is in an extremely poor state of repair. With regards to the other main structural elements, there is no evidence of any other elements of structure which are liable to immediate collapse. However, all the elements of structures on site will continue to deteriorate further and will in several years’ time deteriorate in condition and become dangerous. There is evidence of unauthorised trespass into these buildings and there is also evidence of drug taking, burnt out timbers, matter etc in a number of locations. This development will result in the transformation of a derelict site into a major housing project. Excavation of existing ground for a basement structure. The applicant is seeking permission as part of the development for the excavation of the existing ground to form a basement structure. The basement structure will be contained within secant piles along the Ballinacurra / Rosbrien roads. The basement structure will be created by the removal of existing subsoil. The design is such that the formation of the basement structure will have no impact on the adjoining neighbouring structures. Waste Water The applicant is seeking permission from Irish Water to discharge 1.26 / 3.78 litres/sec (peak) into the Irish Water controlled foul sewer. The proposed development will adhere to this limit. The development will also adhere to the limits of the organic loading as detailed in the Irish Water Pre-Connection Enquiry Form. It can be stated that existing Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 30
public foul sewer system has adequate capacity available to cater for the proposed
development.
Storm Water
The applicant is seeking consent to discharge 4 litres/sec of Stormwater to Limerick City &
County Council stormwater sewer network. A new storm sewer system is proposed to
service the development.
The stormwater system will incorporate attenuation areas, Class 1 silt traps, hydrocarbon
interceptors and two hydro-brake control valves at the outfall to control storm water flow
from the site.
Storm water from roof areas will be collected within underground storage tanks which will
supply water to the building toilets & irrigation areas within the courtyard. Excess storm
water from the rain harvesting system will be discharged to the site’s storm water drainage
system.
The potential impact on surface water during operation is considered to have in the short
and the long term, imperceptible impact, with a neutral impact on quality i.e. an impact
capable of measurement but without noticeable consequences.
Water Supply
There is no large usage of water for process purposes. The water supply to the site will be
required for the following purposes;
• Supply of potable water to the complex.
• Top-up supply to the underground water storage tanks servicing the toilets only
where necessary.
• Fire Fighting purposes. Fire Hydrants will be provided within the development.
The average water demand for the development has been calculated as being 1.24 litres /
sec.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 31 4.3 REMEDIAL AND MITIGATION MEASURES The design of the proposed development has taken account of the potential impacts of the development and the risks to water services and in particular storm water. There are no existing active services within the site as the site has been decommissioned. Mitigation measures will be implemented to protect the local environment from potential effects on water services. These measures seek to avoid or minimise potential effects in the main through the implementation of best practice construction methods and adherence to all relevant legislation. Waste Water The foul system will collect all sewerage which will be discharged directly to the Irish Water Sewers as detailed. Surface Water There will be no un-mitigated discharges to the surface water environments as all surface water will be collected by the proposed storm water system. It will be necessary to periodically check the hydrocarbon interceptors for excessive build- up of hydrocarbons and the attenuation tank for signs of contamination which should be included in a maintenance programme. Water Supply Irish Water has stated in their acceptance that there is adequate water supply within the Irish Water Network to service the site. Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
Punches Cross Development, Limerick. Civil Engineering Report. 32
4.4 REFERENCES
Met Eireann Rainfall Historical Data for the Limerick Region
Details of Open Drains under the control of the Office of Public Works, (OPW)
Geophysical Survey Drawing prepared by “Townland Surveys”
Groundwater Data from flooding consultants “JBA Consulting”
Estimation of surface water discharge and flows from Wallingford Research Laboratories
Institute of Hydrology of the UK.
Site Closure Environmental Report by URS Ireland Ltd.
5.0 APPENDIX
McCusker Environmental – Asbestos Survey.
IGSL – Site Investigation Report.
Irish Water – Statement of Design Acceptance.
Pierce McGann & Company,
Consulting Civil I Structural Engineers
22 Barrington Street, Limerick.
Email: pmcgann@piercemcgann.ie
061-315866 (Rev January 2021)Punches Cross Development, Limerick. Civil Engineering Report. 33 Pierce McGann & Company, Consulting Civil I Structural Engineers 22 Barrington Street, Limerick. Email: pmcgann@piercemcgann.ie 061-315866 (Rev January 2021)
McCusker Environmental Ltd Unit 6, Arbutus Grove, Quin, Co. Clare
Tel: 086 3844894 FAX: 065 6825005
E-Mail: mccuskerenv@eircom.net
Occupational Hygienists & Environmental Consultants
mccusker.ie
CONFIDENTIAL REPORT
________________________________________________________________________
Refurbishment / Demolition Asbestos Survey (RDAS)
Punches Cross, Limerick (Phase1)
Date: 10th August 2020.
Surveyor: James McCusker Approved by: Sean McCusker (Principal Consultant)
--------------------
McCusker Environmental Ltd. Directors: Sean McCusker (Chair)James McCusker. Registered office: Quin, Co. Clare. VAT
Registration Number IE9690439D. Registered Company No: 459409. Tel: 065 6825724. Fax: 065 6825005.mccusker.ie RDAS Punches Cross, Limerick City
Document Control
Client Pierce McGann & Company.
Consulting Structural & Civil Engineers.
Project Title Asbestos Survey – Derelict Site, Punches Cross, Limerick
Document Title Refurbishment / Demolition Asbestos Survey (RDAS)
Punches Cross, Limerick
Report No: Report No: 1326/20
REV Status Author(s) Revision Approved by: Date
History
Final James Sean 10th August
McCusker McCusker 2020
Site Location: Punches Cross, Limerick City Ref|: 1326/20
Client: Mr. Pierce McGann & Company Date: 18th February 2020
Page 2mccusker.ie RDAS Punches Cross, Limerick City
Contents
1. Introduction
2. Executive Summary
3. Survey Specification
4. Laboratory Analysis
5. Appendix
➢ Limitations
➢ Legislation and Removal
➢ Photographs & Laboratory Certificate
➢ References
Glossary of Terms:
ACM Asbestos Containing Material
AIB Asbestos Insulation Board
AMP Asbestos Management Plan
HSA Health & Safety Authority
CAF Compressed Asbestos Fibre
HSG Health & Safety Guidance
RDAS Refurbishment / Demolition Asbestos Survey
MAS Management Asbestos Survey
Chrysotile – White Asbestos: Amosite – Brown Asbestos: Crocidolite – Blue Asbestos
Site Location: Punches Cross, Limerick City Ref|: 1326/20
Client: Mr. Pierce McGann & Company Date: 18th February 2020
Page
3mccusker.ie RDAS Punches Cross, Limerick City
1. Introduction
McCusker Environmental Ltd. was requested by Pierce McGann & Company.
Consulting Structural & Civil Engineers to carry out a Refurbishment / Demolition
Asbestos Survey (RDAS) at a former car dealership site located on Punches Cross in
Limerick City.
The Client intends to demolish the property.
The survey undertaken fulfils the Clients’ legal duty to identify the presence of asbestos-
containing materials, and carryout a risk assessment in respect of these materials at the
premises.
Site Location
Site Location: Punches Cross, Limerick City Ref|: 1326/20
Client: Mr. Pierce McGann & Company Date: 18th February 2020
Page
4mccusker.ie RDAS Punches Cross, Limerick City
2. Executive Summary
Locations of asbestos containing materials:
• Asbestos containing materials located in debris and builders waste
dumped on the site.
Samples taken for Laboratory Analysis.
A. Debris in dumped waste in yard – Positive.
B. Showroom – Wall plaster – Negative.
C. Bitumen felt to roof – Negative.
D. Showroom – Damp prof course – Negative.
Note:
• The site is unsafe from a structural aspect; therefore, the survey was
limited and asbestos containing materials may still be present inside the
premises.
• Large amounts of drug paraphernalia were observed through the
buildings (used hypodermics etc). It is recommended that the area be
made safe before any further investigations are carried out.
• Dumped builders waste containing asbestos has been observed
throughout the site. Remedial measures will have to be put in place
once works commence for demolition.
Site Location: Punches Cross, Limerick City Ref|: 1326/20
Client: Mr. Pierce McGann & Company Date: 18th February 2020
Page
5mccusker.ie RDAS Punches Cross, Limerick City
3. Survey Specification
The survey was in accordance with HSG 264 – Asbestos: The Survey Guide (U.K. Health
and Safety Executive).
HSG 264 – Asbestos: The Survey Guide (U.K. Health and Safety Executive) was
released on 29th January 2010. This document expands on and replaces MDHS 100. This
document is aimed at those conducting surveys, those who commission surveys and
those with specific responsibilities for managing asbestos in accordance with Control of
Asbestos Regulations (CAR) 2006.
The Survey Guide includes two types of Asbestos Surveys.
Management Surveys (replaces former Types 1 & 2 surveys) to assess compliance with
the law. They identify asbestos in all accessible areas; provide risk assessments on all
asbestos containing materials identified and make recommendations where problems are
identified.
Refurbishment and Demolition Surveys are much more intrusive and use destructive
methods to access areas which would normally be classed as inaccessible within a
management survey. These are required if a major refurbishment or demolition was
required. The aim of these surveys is to locate all asbestos within all areas of the building
so that the correct measures can be taken prior to refurbishment or demolition.
SPECIFIC NOTES
General
Once asbestos materials have been identified it is essential that appropriate management
and remedial measures be introduced. In general, asbestos materials that are in good
condition should not be disturbed. Their location should be recorded, and their existence
made known to contractors, staff and others who may be affected. Warning labels advising
of the presence of asbestos may be appropriate together with periodic condition
inspections. For materials in poor condition remedial action (encapsulation or removal)
may be required. Access to areas containing asbestos in poor condition may need to be
restricted until remedial measures have been completed. Any person undertaking work
within the building should be informed of the presence of asbestos. This briefing also
applies to any other person associated with the site, including staff, sub-contractors and
others.
All asbestos removal works should be carried out per the current Asbestos Regulations.
Site Location: Punches Cross, Limerick City Ref|: 1326/20
Client: Mr. Pierce McGann & Company Date: 18th February 2020
Page
6mccusker.ie RDAS Punches Cross, Limerick City
4. Laboratory Analysis
SAMPLING
The number of samples collected will depend on the extent and range of materials present and
the extent of variation within the materials. Sample numbers reflect the extent of variation
(including materials types, colour/shade, texture, depth, and coating). Decisions are made on the
basis of judgement and professional experience. Fewer samples are necessary where items are
clearly identical and the lighting is adequate. Different materials are often different colours so
samples of each may be needed to confirm the presence or
absence of asbestos. Areas with visual signs of repair, replacement or patching will not be
representative of the main material (they may be a more recent non-asbestos replacement
material) and sampling has taken this into account.
After sampling, any broken material with potential to cause airborne dust was sealed, and any
remaining dust or debris removed by wet wiping (or by using an approved ‘type H’ vacuum
cleaner). Samples were placed in a plastic Ziploc type bag, labelled according to Job Number,
Client, Site, Sample Number, Description of product, Area details. The labelled bag was then
placed in a second bag Ziploc bag for transport to the laboratory.
All sampling equipment was cleaned following use to prevent cross contamination of samples.
Asbestos is a known human carcinogen (cancer causing agent) that was used extensively in
Ireland up to the late eighties and early nineties. Asbestos fibres may cause fatal lung disease
when inhaled. These diseases are not sudden and may take many years to develop from the first
exposures. Asbestos containing materials constitute a particular risk within the meaning of the
Safety Health and Welfare at Work (Construction) Regulations 2006 and should be addressed in
the preliminary Health and Safety Plan by the designers and the Project Supervisor Design
Process. Asbestos is a fibrous material and has excellent insulating and fire resistant properties.
Asbestos was seldom used as pure asbestos fibres but rather combined with other products to add
strength and stability or fire resistance to them. Asbestos may be found in products from a few
per cent up to 90% depending on the type of material. Asbestos is a hazard to humans but the
risks posed by asbestos containing materials (ACM) will depend on the type of ACM found. In
simple terms where asbestos products are flaky and would crumble under hand pressure quite
easily they are termed friable. The more friable the ACM the more risk there is to the individual
handling the material. This is reflected in the material assessment scores in the risk assessments
No person is permitted to work with asbestos containing materials unless they have received
training and have taken all reasonable steps to prevent exposure to asbestos. The
requirement for training is detailed in Regulation 17 of the Safety Health and Welfare at
Work (Exposure to Asbestos) Regulations, 2006. Our surveys are undertaken in accordance with
HSG 264 for the Sampling and Surveying of Buildings for Asbestos in Buildings. The results of
the survey and the risk assessments for the asbestos containing materials found are undertaken in
accordance with HSG 264.This document was produced by the Health and Safety Executive in
the UK for the management of Asbestos in Premises. Both these documents are acknowledged
by the Health and Safety Authority as being the current best practice for asbestos surveying and
management in Ireland. This overall assessment can then be used as a guide in taking action to
deal with the asbestos containing materials. The type of action to be taken may range from
managing the material in place to full removal of the ACM’s depending on the outcome of the
assessment.
Site Location: Punches Cross, Limerick City Ref|: 1326/20
Client: Mr. Pierce McGann & Company Date: 18th February 2020
Page
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