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Planning Noise Report
I.O.M. Kart Racing Association, Kart Racing Track Planning Application Noise Report
Site: Land between new Prison site and former airstrip hangar site, Jurby Airfield, Jurby, Isle of Man. Report by: Environmental Protection Unit Prepared for: Planning Department Author Simon Renton MSc, AMIOA Environmental Protection Officer
Environmental Protection Unit Department of Local Government & the Environment Murray House Mount Havelock Douglas
Tel: (01624) 685892
Issue: DRAFT Issue Date: 2 August 05
| Section | Subject | Page |
|---|---|---|
| 1. | Introduction | 3 |
| 2. | Summary | 3 |
| 2.1 | IOM Kart Racing Association | 3 |
| 2.2 | Duke Karting | 3 |
| 3. | Noise Assessment | 4 |
| 3.1 | Noise Assessment in Accordance with BS 4142 | 4 |
| 3.2 | Measured Noise Levels | 4 |
| 3.3 | Predicted Noise Levels | 5 |
| 4. | Recommendation Considerations | 6 |
| 5. | Recommended Conditions | 7 |
| Appendix 1 | Revolution Karting Ltd | 8 |
| Appendix 2 | Controlling noise from karting | 9 |
| Appendix 3 | Location plan of proposed kart racing track and site of new prison | 12 |
The following is a report detailing recommended noise limits and explaining why their determination, with respect to likely environmental noise from the I.O.M Kart Racing Association's application for a Kart Racing Track at Jurby Airfield. The location of proposed kart racing track and prison are as illustrated in Appendix 3.
Jurby Airfield has a history of being used as a race track and I am not aware of any complaints made to Department of Local Government and the Environment in respect of noise nuisance.
However, my concerns are twofold:
i) Whether or not a subsequent intensification of use and increase in noise levels from the karts and other motor vehicles used on the track could cause a noise nuisance to existing local residents.
ii) Whether residents of the new prison, who will be closer to the race track than existing local residents, could consider noise from the track to be a nuisance to them.
The IOM Kart Racing Association have held race meetings approximately twice monthly on the runway at Jurby Airfield for a number of years. The karts used are a range of petrol single-engine and twin-engine karts, no more than 250cc.
It is also proposed to run an annual enduro (24 hour) race.
Duke Karting currently run a kart racing track at Jurby Industrial Estate, beside the site of the proposed kart track.
Since at least 2001 Duke Karting have operated a Kart Race Track of up to 370 metres long at Jurby Airfield. A maximum of seven karts can race at a time.
The existing karts are 200cc 4 Stroke Petrol Engine Karts, but it is likely that if allowed to lease the proposed 1200 metre IOM Kart Race track, these could be replaced by twin-engine 360-400 cc karts.
Duke karting would also consider racing mini-motors on the proposed track, which have 50cc 2-stroke engines.
Duke Karting also run approximately monthly car and bike days, where any type of car or bike can be raced around a circuit on the Jurby Airfield runway.
| Location & Source | LAeq | Background LA 90 |
|---|---|---|
| Prison Site / Background | 40 | 32 dB |
| Runway / 4 Karts @ 3m | 80 |
The greater the difference between the rating level and background noise level, the increased likelihood of complaints.
+10 dB - indicates that complaints are likely. +5 dB - is of marginal significance.
If the rating level is more than 10 dB below the measured background noise level then this is a positive indication that complaints are unlikely.
A 5 dB correction factor is applicable for petrol karts as noise from their engines is tonal in nature.
Sound Level Meter: Bruel & Kjaer Type 2260 Serial No: 2124538 Microphone: Bruel & Kjaer 4189 Serial No: 2117805 Application Module: BZ7201 Calibrator: Type 4231 Serial No: 2147475
The sound level meter conforms to BS7580: Part 1; 1997 Verifying, conformance to, BSEN60651:1994 Type 1, BSEN60804:1994 Type 1 and BS3539:1986.
There was no significant deviation in calibration before and after measurements. In terms of weather there was only a small effect due to a light wind which was blowing SW and on average less than 5 m/s. Occasional gusts of wind causing an overload on the microphone, but not for more than 0.03% of any measurement period.
Table 1 – Measured Noise Levels
| Location | No of Karts& Level of Noise @ 3m | Attenuation due to distance: 175m – 35 dB 250m – 38 dB | Attenuation due to barrier | Noise Level at noise-sensitive premises. |
|---|---|---|---|---|
| Prison | Prison | |||
| 4 Karts – 80 dB | -35 | -10 | 35 dB | |
| 10 Karts 84 dB | -35 | -10 | 39 dB | |
| 28 karts 88 dB | -35 [-18] | -10 | 43 [60] dB | |
| Jurby Residential | Jurby Residential | |||
| 4 Karts – 80 dB | -38 | -10 | 32 dB | |
| 10 Karts 84 dB | -38 | -10 | 36 dB | |
| 28 karts 88 dB | -38 [-19] | -10 | 40 [59]dB |
Table 2 – Predicted Noise Levels
N.B.
These predictions are likely to be on the high side as no account has been taken for attenuation due to the ground or air. Also in respect of the line source predictions [ ] the further away from the site the more predictions will approximate the lower point source calculations, so in reality noise levels will be in-between predicted levels, i.e. between 40 – 59 dB at residential premises for 28 karts racing.
Although electric karts would not be suitable for club racing as proposed by IOM Kart Racing Association they would be suitable for commercial hire kart racing as illustrated in the exert from a kart racing track in London in Appendix 1, where the electric karts are reported to be able to reach speeds of 50mph.
Additional attenuation if necessary could be achieved by construction of an earth bund (or acoustic fence), hush-kits, or use of electric karts, see Appendix 2.
| Specific Environment | Critical health effect(s) | LAeq [dB(A)] | Time base [hours] | LAmax Fast [dB] |
|---|---|---|---|---|
| Outdoor living area | Serious annoyance, daytime and evening | 55 | 16 | - |
| Moderate annoyance, daytime and evening | 50 | 16 | - | |
| Sleep disturbance, windows open | 45 | 8 | 60 |
Assessment in accordance with BS 4142, with background noise level of LA90 32 dB would indicate:
Rating Level with adjustment for tonal noise: LAeq, 1 hour 32 dB – marginal significance LAeq, 1 hour 37 dB – likelihood of complaints
A maximum noise limit of LAeq 55 dB is based on World Health Organization Guideline values for community noise: WHO Guideline values for community noise
The recommended noise limit conditions are based on:
i) The quiet rural background noise level; ii) The history of noise from racing cars, bikes and karts at Jurby Airfield without complaint to the Department of Local Government & the Environment.
1 Event per annum
2 Events per month
All other times:
Noise level assessments shall be made in accordance with BS 4142:1997 'Method for rating industrial noise affecting mixed residential and industrial areas'.
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