J15212 Grasshopper Abergelli Pull up Banners V2.Indd
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Air Quality The construction, operation and decommissioning of the Project all have the potential to affect air quality. Preliminary Assessment A desk based assessment, including the baseline environment in the local area and air dispersion modelling, has been carried out to assess any potential air quality effects resulting from the Project on identified residential and ecological receptors. This assessment considers generation of dust during the construction and decommissioning phases, as well as the generation of stack emissions during operation. The steps we have taken to assess and mitigate this are outlined below. Construction and Decommissioning Dust may result from works during construction, such as earth moving operations for new foundations, and for the Gas Connection and Electrical Connection. The volume of traffic during construction and operation is expected to be small and, as a result, impacts from vehicle exhaust emissions will be temporary and localised in nature. Operation The Generating Equipment has the potential to affect air quality through the emission of flue gases resulting from the combustion of natural gas. This includes the release of oxides of nitrogen (NOx). Modern gas fired power plants are, however, inherently cleaner and produce far fewer emissions than other fossil fuel power plants when compared on an energy output basis. Emissions from the Generating Equipment are also limited by the number of hours the Project can operate. Proposed Mitigation Measures Mitigation against the unwanted spread of dust would be addressed by the Construction Environmental Management Plan (CEMP) through appropriate dust mitigation measures such as covering stockpiles or dowsing them with water during dry, windy conditions. A Construction Traffic Management Plan will be prepared to minimise the increase in congestion and vehicle emissions. Mitigation against negative effects resulting from flue gas emissions during operation is to be achieved through appropriate plant design – most notably through correct stack height. In order to determine stack height, air quality impact assessments have been undertaken using air dispersion modelling. The results of these assessments indicate that the appropriate stack height for the proposed Generating Equipment, which will achieve adequate dispersion of flue gas emissions, is between 35 m and 45 m. Cumulative Effects . s n o i s n e There are no other permitted or proposed developments within the studym area which may result in air i AECOM Limited d d e t 1 Callaghan Square a quality impacts during construction, or any other large combustion sourcest currently or proposed to be s Cardiff, CF10 5BT e h t +44 (0)29 2067 4600 tel m in operation. o r f www.aecom.com d e n i a t Project Title: b o e Conclusion b t s u m ABERGELLI POWER s t n Given the stack height identified based on air quality modelling, and basede on the Preliminary m STATION e r u s Environmental Assessments, there are not anticipated to be any significanta effects on air quality as a e Client: m l l A . result of the Project during construction, operation or decommissioning.t n e m u c o d s i h t e l a c LEGEND s t LEGEND o n o D . t Project Site Boundary n e s n o c (! Modelled Sensitive Human Receptors n Modelled Sensitive Human Receptors e t t i r w s s e . r s n p o i s x n e e m i AECOM Limited d s d ' e t 1 Callaghan Square a t s M Cardiff, CF10 5BT e h t O +44 (0)29 2067 4600 tel m o r C f www.aecom.com d e E n i a t A Project Title: b o t e b u t s u o m ABERGELLI POWER h s t t n i e m STATION e w r u s a g e Client: m 14 n (! l i l !13 A ( . t w n e a m r u c o d d s i s h t i e l h a c t s t LEGEND o n n o o D . t Project Site Boundary n s e 15 s ! e ( n i o l c (! Modelled Sensitive Human Receptors n e e t t r i r w r s s o e r p x s e s ' !16 e ( M s O C u E A t t u a o h t i h t w 12 (! g (!14 n i (!13 y w t a r r d a s i h t p n 17 (! o s 15 y (! e i l n e r r a o s (!16 e s o u t t a h , t (!12 r y t r a e p (!17 v y n a e o t o , 11 r e (! s v t e 11 o ! s ( a t a h h w y w t i l i b y a i l t y i l n i a (!26 s e b i n a e d i l d (!1 n a y , y t i l n i b (!2 i 6 a (!3 (! s n o p !7 s !26 ( s ( e r e i o n n s (!25 t p e e c d c a M 4 d (! (!8 O C n (!1 E A a (!5 . w , a l y y t b (!28 i d l e i r i u b 10 q (! i 2 e (! r 9 6 (! ! s ( s 3 a (! r n o o M O p !7 (!19 C E ( s A y e !24 b ( r d (!18 e e r o g a n s a (!20 t s p 25 t (! e 27 (! c x p e , e s (!23 e i c t r a c p d a r i h t y b M n o 4 p (! O 8 u (! d C e i l e r E r o A d e . (!5 c u d w o r p a e l r , (!22 Copyright: d e y i f (!21 i d b o © Crown copyright and database rights 28 ! m ( , d d [2017] Ordnance Survey 0100031673 e e s u r © Local Government Information House i e b t u Limited copyright and database rights o n q (!10 y a [2017] 0100031673 e m r 9 t I (! . t s n AECOM Internal Project No: e i l a c s ' r 60542910 M o O C E A Drawing Title: f M o e s O u e C h t MODELLED SENSITIVE (!19 r E o f d A e r HUMAN RECEPTORS a p y e Scale at A3: 1:30,000 r p b (!24 n e e Drawing No: Rev: d b s e 18 a (! h FIGURE 6.3 e 005 g r n i w g a Drawn: Chk'd: App'd: Date: r d a s 400 0 400 800 1,200 1,600 2,000 m i h s ± T GM CC CA 13/12/17 a (!20 Filename: P:\UKCDF1-IE\Projects\Environmental\Jobs - Potential\2017 Q1\Abergelli Power Station\010 GIS\02_Maps\Air Quality\F6_3_HumanReceptors_v1.mxd t p 27 e (! c x e , s (!23 e i t r a p d r i h t y b n o p u d e i l e r r o d e c u d www.abergellipower.co.uk o r p e r (!22 , Copyright: d e i f (!21 i d o © Crown copyright and database rights m , d [2017] Ordnance Survey 0100031673 e s u © Local Government Information House e b t Limited copyright and database rights o n y a [2017] 0100031673 m t I . t n AECOM Internal Project No: e i l c s ' 60542910 M O C E A Drawing Title: f o e s u e h t MODELLED SENSITIVE r o f d e r HUMAN RECEPTORS a p e Scale at A3: 1:30,000 r p n e e Drawing No: Rev: b s a h FIGURE 6.3 005 g n i w a Drawn: Chk'd: App'd: Date: r d s 400 0 400 800 1,200 1,600 2,000 m i ± h T GM CC CA 13/12/17 Filename: P:\UKCDF1-IE\Projects\Environmental\Jobs - Potential\2017 Q1\Abergelli Power Station\010 GIS\02_Maps\Air Quality\F6_3_HumanReceptors_v1.mxd Noise and Vibration The construction, operation and decommissioning phases of the Project have the potential to impact upon noise and vibration. Preliminary Information A desk based study and baseline noise monitoring were undertaken to establish baseline sound levels at local noise sensitive receptors. The study area has been determined to incorporate the nearest representative Noise Sensitive Receptors (NSRs) in all directions as shown on the figure below. These are all residential dwellings. The noise environment is characterised by animals, farming activities and distant road traffic during the day, the wind in trees and distant road traffic at night, and noise from the existing Swansea North Substation and Felindre Gas Compressor Station. The sound levels measured during the baseline noise survey complied with environmental noise limit guidelines from the World Health Organisation (WHO) at all but one receptor. At that receptor, the baseline noise levels are already exceeded without the Project being present. Construction and Decommissioning Noise disturbance as a result of construction and decommissioning could arise from activities such as excavation for foundations, delivery of the plant, and excavation of the Gas Connection and Electrical Connection.