table e.2(i): uncontaminated emissions to surface …unit poultry houses poultry houses variable...

I.P.P.C. Application Form Corby Rock Eggs Ltd

TABLE E.2(i): UNCONTAMINATED EMISSIONS TO SURFACE WATERS(One page for each emission)

Emission Point:

Emission Point Ref. No:

Source of Emission:

Location :

Grid Ref. (10 digit, 5E,5N):

Name of receiving waters:

__________________________________________________________________Application Form Attachment A-M.pdf

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TABLE E.3(i): UNCONTAMINATED EMISSIONS TO GROUND (1 Page for each emission point)

Emission Point or Area:

Emission Point/Area Ref. No: No Emissions to Ground

Emission Pathway:(borehole, well, percolation area, soakaway, landspreading, etc.)

Location :

Grid Ref. (10 digit, 5E,5N):

Aquifer classification for receiving groundwater body:

Groundwater vulnerability assessment (including vulnerability rating):

Identity and proximity of groundwater sources at risk (wells, springs, etc):

Identity and proximity of surface water bodies at risk:

Application Form Attachment A-M.pdf

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TABLE F.1(i) : EMISSIONS MONITORING AND SAMPLING POINTS - ( 1 table per monitoring point)

Emission Point Reference No. : Not Applicable

Parameter Monitoring frequency Accessibility of Sampling Points Sampling method Analysis method/ technique


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TABLE H.1(i) WASTE - Waste Recovery/Disposal

Waste material EWC Code Hazardous(H) /Other Waste (O)

Main source1

Quantity On-site recovery/disposal2

Off-site Recovery, reuse or recycling

Off-site Disposal

Tonnes / month

m3 / month (Method & Location) (Method, Location &Undertaker)

(Method, Location &Undertaker)

Domestic Refuse

Vet Waste

Animal Tissue Waste

Fluorescent Tubes

Poultry Manure

Waste Eggs

20 03 01

18 02 02

02 01 02

20 01 21

02 01 06

02 02 03

0

0

0

H

0

0

Work areas

Vet, Animal Houses

Poultry Houses

Light throughout unit

Poultry Houses

Poultry Houses

Variable

Variable

c. 3-4% Mortality

5 or 10 annum

40 tonnes / year / 1,000 Birds

1% approx

Recyclable material brought to Monaghan Co. Co. Civic Amenity Centre by applicant

Applied to land as fertiliser

Non-Recyclable material brought to Monaghan Co. Co.

Landfill by or on behalf of the applicant

College Proteins Ltd

Return to Supplier and/or Civic Amenity Centre

Drumsnatt Haulage

College Proteins Ltd

1 A reference should be made to the main activity/ process for each waste.2 The method of disposal or recovery should be clearly described and referenced to Attachment H.1


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Table I.2(i) GROUNDWATER QUALITY (Sheet 1 of 2) Monitoring Point/ Grid Reference: ____________________________Parameter Results

(mg/l)Sampling method(composite etc.)

Normal Analytical Range

Analysis method / technique

Date Date Date DatepHAmmoniacal nitrogen NH4-NPhosphate PO4

Faecal coliforms ( /100mls)Total coliforms ( /100mls)Water level (m OD)Phosphate PO4

Faecal coliforms ( /100mls)Total coliforms ( /100mls)Water level (m OD)


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TABLE I.2(ii): LIST OF OWNERS/FARMERS OF LAND

Land Owner Townlands where landspreading MapReference

Fertiliser P requirement for each farm

*NMP must take account of on-farm slurry

Total P requirement of the client List _____________


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TABLE I.2(iii): LANDSPREADING

Land Owner/Farmer________________________________

Map Reference_______________________

Field ID

Total Area (ha)

(a)Usable Area (ha)

Soil P TestMg/l

Date of P test

Crop P Required(kg P/ha)

Volume of On-Farm Slurry Returned (m3/ha)

Estimated P in On-Farm Slurry (kg P/ha)

(b)Volume to be Applied (m3/ha)

P Applied (kg P/ha)

Total Volume of imported slurry per plot (m3)

TOTAL VOLUME THAT CAN BE IMPORTED ON TO THE FARM.

Concentration of P in landspread matterial - kg P/m3

Concentrarion of N in landspread material - kg N/m3


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Attachment No. A1

Non Technical Summary

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Non – Technical Summary

The Farm

This privately owned poultry unit has 2 poultry houses designed for housing laying hens with a maximum stocking capacity of 57,600 layers. There are also 3 empty houses on the site and these have been decommissioned over the past three years. The poultry unit covers approximately 1 acre is situated on a farm of approximately 34 Acres. It is a family run business. All housing is specifically designed for caged laying hens. The farm is situated in Co. Monaghan approx 2 miles south of Monaghan town and is located at grid ref 268348, 331877.

The poultry housing is surrounded on two sides by agricultural pasture land and the other sides are a feed mill and a wood turnery business.

Poultry Housing

Laying hens are kept in 2 sheds which were constructed 21 years ago, cages were refurbished 5 years ago. The sheds are of timber framed construction, all sheds have polished concrete floors and insulated wall panels. The working area where vehicles operate and the area surrounding all the sheds are laid with concrete.

Ventilation in the sheds is via side wall mounted fans with air drawn from the roof ridge and exiting via side wall fan boxes.

All the systems are controlled and monitored electronically to ensure optimum environmental and welfare conditions within the sheds. An audible alarm is fitted to each house.

Manure is collected on belts in the houses. The cages are fitted with an air blowing mixing unit which gives a better environment for the birds and reduces the moisture content of the manure from approx 70% to 45-50%. Manure is removed from the houses each week and is loaded directly into trailers for land spreading by a specialist contractor.

Feed is delivered to galvanised storage bins located adjacent to the sheds.

The manure management system is based on maintaining dry manure at all times, and all cleaning is done as a dry operation using compressed air so there is no wash water at any time from cleaning or manure handling operations.

Nipple drinkers are used in all sheds to reduce wastage of water and to ensure there is no spillage that may compromise the dry manure system. Water consumption is monitored and recorded for each shed.

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Production Cycle

Birds are brought into the sheds when they are 16 weeks of age and remain in the sheds until depopulation at 74 weeks of age. At that stage the birds are removed off site and processed for food products. Feed from a UFAS accredited mill is delivered by an approved and audited haulier in up to 28 tonne capacity covered Lorries. Feed consumption is approximately 118g of feed per bird per day. Diets are formulated according to the birds’ requirements so that over the production cycle 2 diets are fed with protein and phosphorus levels being reduced as the birds get older. Eggs are collected daily by automatic belts and conveyors to the farm packer and transferred to trolleys or palletised. Mortalities are removed from the sheds daily and the numbers recorded. Carcasses are kept on-site in covered vermin proof bins until they are collected by College Proteins who are an approved rendering plant.

At the end of the laying cycle, birds are removed from the shed and the shed, cages and floor is dry cleaned, disinfected and fumigated prior to restocking. The feed bins are cleaned out and the cone area, where residue is likely to accumulate is cleaned and disinfected with a food grade product. A turn around time of 2-3 weeks between flocks is planned.

These measures are intended to reduce the production and emission of ammonia, odours and dust form the sheds escaping to the environment. This in turn should reduce the environmental impact of the farming activities.

Responsibility

Primary responsibility for running the site rests with Mr George Quinn. His Grandson, Mark Quinn is the technical manager on the site and Mrs Marie Morris is the production manager.

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Attachment No. B1

Copy of Certificate of Incorporation

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Attachment No. B2

1:50,000 Location Map – Map 1Site Plan Identifying the Site Boundary – Map 2

Site Plan – Map 3

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Attachment No. B5

Site Planning History

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Attachment No. B7

Copy of Site NoticeMap showing Location of Site Notice – Map 4Copy of Newspaper Advertisement – Map 5

Copy of Notification to Local Authority

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Attachment No. E4

Noise Survey

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RMEEnvironmental

13 Park Lane,

Dawson St.

Monaghan.

Environmental Noise Survey Carried out on

the Corby Rock Farm

Client:

Corby Rock Farm Ltd.

Date:

October 2004

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Table of Contents

Page No.

1.0 Introduction 2

2.0 Noise survey methodology 2

3.0 Instrumentation used 3

4.0 Survey results 3

5.0 Assessment criteria 3

6.0 Recommendation 6

Appendix i Survey results

Appendix ii Acoustic terminology

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1.0 Introduction

The report deals with the noise emission impacts from the Corby Rock egg production

facility Ballybay Rd., Monaghan, Co Monaghan.

The aim of the study was to:

Establish the noise emissions from the facility

Assess the environmental impact

Where deemed necessary, specify appropriate ameliorative measures

2.0 Noise Survey Methodology

Continuous noise measurements were taken at two locations (N1 & N2), see figure 1,

using an environmental noise analyser with data logging facilities set on real time, the

logged data was later downloaded via a personal computer using Proscon software.

N1, monitoring location is situated at the perimeter fence at the North-eastern

boundary of the facility. N2 is situated at the Western Side of the site, just inside the

perimeter fence. The noise survey was carried out over a four day period between 6th

and 9th November 2004.

Office

Milling Area

FARM AREA

Ancill

iary

Buildi

ngs

N1

N2

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The monitoring points are described in Table 1.0. All measurements were carried out in accordance with ISO1996, Part 1 (Description and Measurement of Environmental Noise - Part 1: Basic Quantities and Procedures).

Table 1.0: Noise Monitoring Locations

Monitoring Location DescriptionN1 Located on the north eastern boundary of the siteN2 Located on the western boundary of the site.

Weather conditions during the survey were suitable for noise assessment; being dry

and calm.

3.0 Instrumentation used

The following instrumentation was used in the baseline survey:

Larson Davis 812 Type 1, Precision Integrating Sound Level Analyser/Data

logger with 1/2" Condenser Microphone

Wind Shields Type: Larson Davis 2120 Windscreen.

All acoustic instrumentation was calibrated before and after each survey and no drift of calibration was

observed (calibration level 114dB at 250HZ).

4.0 Noise Survey Results

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The detailed results of the hourly noise data recorded in the study are provided in

Appendix i. The recorded daytime and nighttime mean values of LAeq and L90 are

shown in Table 2.0. These values are the mean of all the recorded values

Existing noise levels were established over the duration of the survey.

Table 2.0 Noise levels

Notes 1. Levels are the mean (arithmetic average) for the specific period 2. Daytime is 08.00 – 22.00 hrs and night-time is 22.00 – 08.00 3. Leq is the total noise level, while L90 is the background or lowest 10% of noise for the period.

5.0 Assessment criteria

The criterion is one of annoyance or nuisance rather than damage. The relevant

standard presently in use is the ISO 1996 (3 Parts). This standard does not use the

criteria of differentials, however, an increase in noise level of 5 dB(A) is considered as

one of only marginal significance. In general, a noise is liable to provoke a complaint

whenever its level exceeds by a certain margin the pre-existing noise level or when it

attains an absolute level.

At present there are no statutory limits for environmental noise levels, however, the

EPA recommend that ideally, on sites of industrial nature or similar, if the total noise

level from all sources is taken into account, the noise level at sensitive locations

should be kept below an L(A)eq value of 55dB(A) by daytime (08.00 to 22.00) and 45

dB(A) at night-time (22.00 to 08.00). The sensitivity to noise is usually greater at

night-time than it is during the day, by about 10 dB(A). Audible tones and impulsive

noise at sensitive locations at night should be avoided, irrespective of the noise level.

Location I.D PeriodDay-time Night-time

Leq (1hr) dB(A)

L90 (1hr) dB(A)

Leq (1hr) dB(A)

L90 (1hr) dB(A)

N1 6th – 7th Nov ‘04 51.5 46.2 45.4 42.6

N2 7th – 9th Nov ‘04 48.8 44.5 42.3 40.5

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6.0 Assessment of the noise levels

The survey was undertaken during a period, which is representative of the typical operational conditions of the plant.

Noise levels recorded at location N1 indicate a mean LAeq of 49.1 dB(A), the daytime LAeq is 51.5 and the nighttime level is 45.4 dB(A). While at location N2 the mean LAeq

is 45.6 dB(A), the daytime LAeq is 48.8 and the nighttime level is 42.3 dB(A).

The noise emissions from the facility, measured at the perimeter, are well within the EPA guidelines for both daytime and nighttime activities. There are no impulsive noise emissions from the facility.

The plant is located in an urban/rural setting, with the nearest noise sensitive location located at a distance in excess of 150m.

Noise emissions from the facility are not likely be a source of annoyance into the future.

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Appendix i

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Location N1 North-eastern boundary

Leq Lmin Lmax L10 L90 Date Time Duration dBA dBA dBA dBA dBA 06Nov2004 17:00:00 1:00:00 57.6 45.1 71.6 62.4 47.7 06Nov2004 18:00:00 1:00:00 48.3 42.2 72.7 50.6 44.2 06Nov2004 19:00:00 1:00:00 46.9 41.4 70.7 49.4 43.6 06Nov2004 20:00:00 1:00:00 46.4 41.2 66.2 48.6 43.3 06Nov2004 21:00:00 1:00:00 46.6 40.8 69.2 48 42.8 06Nov2004 22:00:00 1:00:00 45.3 41 67.2 46.6 42.4 06Nov2004 23:00:00 1:00:00 45.5 40.7 59.8 48.4 42.3 07Nov2004 00:00:00 1:00:00 43.3 40.6 53.1 44.6 42 07Nov2004 01:00:00 1:00:00 43.6 40.4 51.5 44.9 42.1 07Nov2004 02:00:00 1:00:00 45.2 40.5 53.3 48.5 42.1 07Nov2004 03:00:00 1:00:00 43.5 40.6 55.5 44.7 42.1 07Nov2004 04:00:00 1:00:00 45.1 40.1 53.3 48.1 42 07Nov2004 05:00:00 1:00:00 45.2 40.5 57.9 48.2 42.1 07Nov2004 06:00:00 1:00:00 48.1 43.9 59.5 49.7 46.4 07Nov2004 07:00:00 1:00:00 49.2 40.8 72 49.9 42.8 07Nov2004 08:00:00 1:00:00 59 44.9 70 63.2 47.3 07Nov2004 09:00:00 1:00:00 48.7 44.8 68.3 49.9 47 07Nov2004 10:00:00 1:00:00 48.6 44.7 62.4 49.9 47 07Nov2004 11:00:00 1:00:00 48.9 44.9 72.7 50.3 47.1 07Nov2004 12:00:00 1:00:00 60.3 45.2 70.6 66.2 47.5 07Nov2004 13:00:00 1:00:00 49.5 45.2 67.8 50.5 47.5 07Nov2004 14:00:00 1:00:00 49.9 45.2 74.3 51.1 47.3 07Nov2004 15:00:00 1:00:00 49 45.2 65 50.2 47.3 07Nov2004 16:00:00 1:00:00 55.8 45.5 69.5 59.1 47.4 07Nov2004 17:00:00 1:00:00 59.3 45.4 69.6 65.3 48 07Nov2004 18:00:00 1:00:00 48.6 41.9 64.9 50.9 44.3Mean 49.1 51.5 44.8

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Location N1 North-eastern boundary

Day-time levels 08:00 - 22:00 Leq Lmin Lmax L10 L90 Date Time Duration dBA dBA dBA dBA dBA 06Nov2004 17:00:00 1:00:00 57.6 45.1 71.6 62.4 47.7 06Nov2004 18:00:00 1:00:00 48.3 42.2 72.7 50.6 44.2 06Nov2004 19:00:00 1:00:00 46.9 41.4 70.7 49.4 43.6 06Nov2004 20:00:00 1:00:00 46.4 41.2 66.2 48.6 43.3 06Nov2004 21:00:00 1:00:00 46.6 40.8 69.2 48 42.8 07Nov2004 08:00:00 1:00:00 59 44.9 70 63.2 47.3 07Nov2004 09:00:00 1:00:00 48.7 44.8 68.3 49.9 47 07Nov2004 10:00:00 1:00:00 48.6 44.7 62.4 49.9 47 07Nov2004 11:00:00 1:00:00 48.9 44.9 72.7 50.3 47.1 07Nov2004 12:00:00 1:00:00 60.3 45.2 70.6 66.2 47.5 07Nov2004 13:00:00 1:00:00 49.5 45.2 67.8 50.5 47.5 07Nov2004 14:00:00 1:00:00 49.9 45.2 74.3 51.1 47.3 07Nov2004 15:00:00 1:00:00 49 45.2 65 50.2 47.3 07Nov2004 16:00:00 1:00:00 55.8 45.5 69.5 59.1 47.4 07Nov2004 17:00:00 1:00:00 59.3 45.4 69.6 65.3 48 07Nov2004 18:00:00 1:00:00 48.6 41.9 64.9 50.9 44.3Mean 51.5 54.1 46.2

Night-time levels 22:00 - 08:00 Leq Lmin Lmax L10 L90 Date Time Duration dBA dBA dBA dBA dBA 06Nov2004 22:00:00 1:00:00 45.3 41 67.2 46.6 42.4 06Nov2004 23:00:00 1:00:00 45.5 40.7 59.8 48.4 42.3 07Nov2004 00:00:00 1:00:00 43.3 40.6 53.1 44.6 42 07Nov2004 01:00:00 1:00:00 43.6 40.4 51.5 44.9 42.1 07Nov2004 02:00:00 1:00:00 45.2 40.5 53.3 48.5 42.1 07Nov2004 03:00:00 1:00:00 43.5 40.6 55.5 44.7 42.1 07Nov2004 04:00:00 1:00:00 45.1 40.1 53.3 48.1 42 07Nov2004 05:00:00 1:00:00 45.2 40.5 57.9 48.2 42.1 07Nov2004 06:00:00 1:00:00 48.1 43.9 59.5 49.7 46.4 07Nov2004 07:00:00 1:00:00 49.2 40.8 72 49.9 42.8Mean 45.4 47.4 42.6

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Location N2 Western Boundary

Leq Lmin Lmax L10 L90 Date Time Duration dBA dBA dBA dBA dBA 07Nov2004 19:00:00 1:00:00 52.6 40.8 76.4 50.2 43 07Nov2004 20:00:00 1:00:00 42.3 39.3 56.8 44 40.4 07Nov2004 21:00:00 1:00:00 42 39.1 58.2 43 40.3 07Nov2004 22:00:00 1:00:00 43.5 39.6 63.4 45.4 40.8 07Nov2004 23:00:00 1:00:00 42.6 39.5 56.6 44 40.5 08Nov2004 00:00:00 1:00:00 43.8 39.3 66.3 45.6 40.3 08Nov2004 01:00:00 1:00:00 40.8 38.8 49.9 41.7 40.1 08Nov2004 02:00:00 1:00:00 41.1 38.7 54.4 42 40.1 08Nov2004 03:00:00 1:00:00 41.8 39 61.8 42.7 40.1 08Nov2004 04:00:00 1:00:00 40.8 38.8 46.3 41.7 40.1 08Nov2004 05:00:00 1:00:00 41.1 39.1 48.7 41.9 40.2 08Nov2004 06:00:00 1:00:00 42.8 39.4 66.7 43 41 08Nov2004 07:00:00 1:00:00 46.4 40.4 65.7 48.5 41.7 08Nov2004 08:00:00 1:00:00 53.2 43.5 63.5 56.6 47.8 08Nov2004 09:00:00 1:00:00 49.9 45.2 67.8 51.3 47.6 08Nov2004 10:00:00 1:00:00 48.7 44.6 64 49.9 46.6 08Nov2004 11:00:00 1:00:00 49.1 43 76.9 50.7 45.5 08Nov2004 12:00:00 1:00:00 49.5 43.8 66.2 51 46.8 08Nov2004 13:00:00 1:00:00 52 43.8 71.1 54.8 45.7 08Nov2004 14:00:00 1:00:00 61.1 44.2 85.8 64.3 46.6 08Nov2004 15:00:00 1:00:00 49.6 42.6 64.6 51.3 45 08Nov2004 16:00:00 1:00:00 48 42.6 67.7 49.6 44.4 08Nov2004 17:00:00 1:00:00 46.8 42 66 48.7 44 08Nov2004 18:00:00 1:00:00 45.2 41.4 59.9 47.7 42.7 08Nov2004 19:00:00 1:00:00 44.7 40.9 55.9 47.4 42.3 08Nov2004 20:00:00 1:00:00 42.6 39.1 59 44.3 40.4 08Nov2004 21:00:00 1:00:00 42.6 39.1 60.2 43.9 40.4 08Nov2004 22:00:00 1:00:00 41.2 38.8 55.7 41.9 40.1 08Nov2004 23:00:00 1:00:00 41.5 38.9 52.9 42.9 40.2 09Nov2004 00:00:00 1:00:00 41.4 39.1 50.3 42.6 40.2 09Nov2004 01:00:00 1:00:00 41.1 38.8 59 41.9 40.1 09Nov2004 02:00:00 1:00:00 41 38.8 55.4 41.8 40.1 09Nov2004 03:00:00 1:00:00 41.1 38.9 55.1 41.9 40.1 09Nov2004 04:00:00 1:00:00 41.4 38.9 57.3 42 40.2 09Nov2004 05:00:00 1:00:00 41.3 38.9 53.4 42.1 40.2 09Nov2004 06:00:00 1:00:00 43.7 39.6 64.6 45.5 41.3 09Nov2004 07:00:00 1:00:00 48.3 40.2 71.3 50.2 41.8 09Nov2004 08:00:00 1:00:00 53.9 44.2 79.8 57.1 46.5 09Nov2004 09:00:00 1:00:00 49.8 44.9 72.4 51.1 46.6 09Nov2004 10:00:00 1:00:00 49.1 42.5 71.8 50.9 46.1 09Nov2004 11:00:00 1:00:00 51.8 44.4 75.5 54 46.6Mean 45.6 47.1 42.5

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Location N2 Western BoundaryDay-time levels 08:00 - 22:00 Leq Lmin Lmax L10 L90 Date Time Duration dBA dBA dBA dBA dBA 07Nov2004 19:00:00 1:00:00 52.6 40.8 76.4 50.2 43 07Nov2004 20:00:00 1:00:00 42.3 39.3 56.8 44 40.4 07Nov2004 21:00:00 1:00:00 42 39.1 58.2 43 40.3 08Nov2004 08:00:00 1:00:00 53.2 43.5 63.5 56.6 47.8 08Nov2004 09:00:00 1:00:00 49.9 45.2 67.8 51.3 47.6 08Nov2004 10:00:00 1:00:00 48.7 44.6 64 49.9 46.6 08Nov2004 11:00:00 1:00:00 49.1 43 76.9 50.7 45.5 08Nov2004 12:00:00 1:00:00 49.5 43.8 66.2 51 46.8 08Nov2004 13:00:00 1:00:00 52 43.8 71.1 54.8 45.7 08Nov2004 14:00:00 1:00:00 61.1 44.2 85.8 64.3 46.6 08Nov2004 15:00:00 1:00:00 49.6 42.6 64.6 51.3 45 08Nov2004 16:00:00 1:00:00 48 42.6 67.7 49.6 44.4 08Nov2004 17:00:00 1:00:00 46.8 42 66 48.7 44 08Nov2004 18:00:00 1:00:00 45.2 41.4 59.9 47.7 42.7 08Nov2004 19:00:00 1:00:00 44.7 40.9 55.9 47.4 42.3 08Nov2004 20:00:00 1:00:00 42.6 39.1 59 44.3 40.4 08Nov2004 21:00:00 1:00:00 42.6 39.1 60.2 43.9 40.4 09Nov2004 08:00:00 1:00:00 53.9 44.2 79.8 57.1 46.5 09Nov2004 09:00:00 1:00:00 49.8 44.9 72.4 51.1 46.6 09Nov2004 10:00:00 1:00:00 49.1 42.5 71.8 50.9 46.1 09Nov2004 11:00:00 1:00:00 51.8 44.4 75.5 54 46.6Mean 48.8 50.6 44.5

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Location N2 Western Boundary

Night-time levels 22:00 - 08:00 Leq Lmin Lmax L10 L90 Date Time Duration dBA dBA dBA dBA dBA 07Nov2004 22:00:00 1:00:00 43.5 39.6 63.4 45.4 40.8 07Nov2004 23:00:00 1:00:00 42.6 39.5 56.6 44 40.5 08Nov2004 00:00:00 1:00:00 43.8 39.3 66.3 45.6 40.3 08Nov2004 01:00:00 1:00:00 40.8 38.8 49.9 41.7 40.1 08Nov2004 02:00:00 1:00:00 41.1 38.7 54.4 42 40.1 08Nov2004 03:00:00 1:00:00 41.8 39 61.8 42.7 40.1 08Nov2004 04:00:00 1:00:00 40.8 38.8 46.3 41.7 40.1 08Nov2004 05:00:00 1:00:00 41.1 39.1 48.7 41.9 40.2 08Nov2004 06:00:00 1:00:00 42.8 39.4 66.7 43 41 08Nov2004 07:00:00 1:00:00 46.4 40.4 65.7 48.5 41.7 08Nov2004 22:00:00 1:00:00 41.2 38.8 55.7 41.9 40.1 08Nov2004 23:00:00 1:00:00 41.5 38.9 52.9 42.9 40.2 09Nov2004 00:00:00 1:00:00 41.4 39.1 50.3 42.6 40.2 09Nov2004 01:00:00 1:00:00 41.1 38.8 59 41.9 40.1 09Nov2004 02:00:00 1:00:00 41 38.8 55.4 41.8 40.1 09Nov2004 03:00:00 1:00:00 41.1 38.9 55.1 41.9 40.1 09Nov2004 04:00:00 1:00:00 41.4 38.9 57.3 42 40.2 09Nov2004 05:00:00 1:00:00 41.3 38.9 53.4 42.1 40.2 09Nov2004 06:00:00 1:00:00 43.7 39.6 64.6 45.5 41.3 09Nov2004 07:00:00 1:00:00 48.3 40.2 71.3 50.2 41.8Mean 42.3 43.5 40.5

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Appendix ii

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Acoustics Terminology

SoundSound is produced by a mechanical disturbance emanating as a wave motion in air at a

speed of about 330 metres per second (the speed of sound in air). This is characterised

by its amplitude, measured in decibels (dB) and its frequency, measured in Hertz (Hz).

Noise is unwanted or undesirable sound, it does not accumulate in the environment

and is usually localised.

The Decibel Scale

The difficulty in assigning a unit of measurement to sound is the sensitivity of the human ear. Audible sound pressures range from the threshold of hearing and the threshold of pain, which corresponds to a ratio of 1:1,000,000. In order to cover this vast range a logarithmic unit: the decibel (dB) is used. The decibel scale corresponding to the threshold of hearing and the threshold of pain ranges from 0 to 140dB. A decibel is defined as ten times the base-ten logarithm of a power ratio.

The decibel scale with indicative noise examples

Decibels Pascals Activity140dB 200Pa Threshold of Pain120dB 20Pa Jet taking off100dB 2Pa Pneumatic Drill80dB 0.2Pa Heavy Truck60dB 0.02 Business Office40dB 0.002 Library20dB 0.0002 Wood0dB 0.00002 Threshold of Hearing

Frequency

The size of the pressure fluctuation is measured using the Decibel, the rate of these

fluctuations is measured by cycles per second or Hertz (Hz). Human ears are most

sensitive to mid frequencies in the range between 500 Hz to 6kHz. Sounds with a

frequency less that 20 Hz are generally not audible, this type of sound is said to be

infrasonic. Above 20kHz sounds are generally inaudible and the sounds are described

as ultrasonic.

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‘A’ Weighting

Within that range the ear can tolerate low frequencies more than middle to high frequencies and one must ensure that any measurement device elicits a numerical value, which matches the ear's response. This is achieved by introducing an electronic filter (called an ‘A’ weighted filter) into the measuring system. This weighting characteristic provides good correlation with loudness and since its maximum lies in the frequency region where the ear is most sensitive, it takes into account the hearing damage potential of the noise. For this reason environmental noise levels are generally measured in terms of ‘A’ weighted decibels, dB(A).

Where noise levels vary in time, statistical analysis of the variation can be carried out.

The results are usually stated in the form LN (L for level), where N is the percentage of

time a level is equalled or exceeded. Hence if L90 = 40 dB(A), the noise level exceeds

40 dB(A) for 90% of the time measured period (i.e. background noise level is 40

dB(A). )

In addition to the statistical units, the equivalent continuous level is also measured.

The equivalent continuous level, Leq, is measured in dB(A) and is a notional steady

level that has the same sound energy as the real fluctuating sound over the same

measurement period. It is measured using an integrating sound level meter (SLM). Leq

is often described as the total noise level for a specified period.

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table e.2(i): uncontaminated emissions to surface …unit poultry houses poultry houses variable...

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