Roma to Brisbane Pipeline Dalby Compressor Station Upgrade Environmental Management Plan. Appendix 8. Noise Assessment

Transcription

1 Roma to Brisbane Pipeline Dalby Compressor Station Upgrade Environmental Management Plan Appendix 8 Noise Assessment PR Rev 0; June 2011

2 PR Rev 0; June 2011 Roma to Brisbane Pipeline Dalby Compressor Station Upgrade Environmental Management Plan

3 Sonus Pty Ltd 17 Ruthven Avenue ADELAIDE SA 5000 Phone: (08) Facsimile: (08) ABN: APA DALBY COMPRESSOR STATION Proposed Extension Prepared For RPS 743 Ann Street, Fortitude Valley, Brisbane, QLD 4006.

4 PAGE 2 GLOSSARY Background noise level Background creep CONCAWE db(a) Equivalent noise level L A10 L A90 L Aeq L Aeq, 1 hour L Aeq, adj, 1 hour L pa,lf RBL Sensitive receptor Sound power level WHO Worst Case Noise level in the absence of intermittent noise sources The gradual increase in background noise levels in an area as a result of successive developments generating constant noise levels at a particular location. The oil companies international study group for conservation of clean air and water Europe The propagation of noise from petrochemical complexes to neighbouring communities A weighted noise level measured in decibels. A weighting is a frequency adjustment representing the response of the human ear Energy averaged noise level A weighted noise level exceeded 10% of the time, representing the typical upper noise level A weighted noise level exceeded 90% of the time, representing the background noise level A weighted equivalent noise level measured in decibels A weighted equivalent noise level measured in decibels over a period of 1 hour A weighted equivalent noise level measured in decibels over a period of 1 hour and adjusted for tonality Indoor low frequency A weighted noise level Rating Background Level A location in the vicinity of the proposed development, where noise may affect the amenity of the land use. For the proposed development, sensitive receptors are generally dwellings. A measure of the sound energy emitted from a source of noise. World Health Organisation Conditions resulting in the highest noise level at or inside dwellings. Worst case meteorological conditions can be characterised as no cloud at night with wind from the project site to dwellings. Worst case building construction refers to a façade constructed from light weight materials providing the lowest noise reduction across it.

5 PAGE 3 TABLE OF CONTENTS GLOSSARY... 2 TABLE OF CONTENTS INTRODUCTION DESCRIPTION OF EXISTING ENVIRONMENT METEOROLOGICAL CONDITIONS AND ATMOSPHERIC EFFECTS CRITERIA ENVIRONMENTAL PROTECTION (NOISE) POLICY PLANNING FOR NOISE CONTROL GUIDELINE WORLD HEALTH ORGANISATION GUIDELINES LOW FREQUENCY NOISE DRAFT GUIDELINE SUMMARY OF CRITERIA ASSESSMENT NOISE SOURCES ADDITIONAL ACOUSTIC ATTENUATION PREDICTED NOISE CONCLUSION REFERENCES APPENDIX A: SENSITIVE RECEPTORS IN THE VICINITY OF THE FACILITY APPENDIX B: NOISE CONTOUR... 24

6 PAGE 4 1 INTRODUCTION The APA Dalby Compressor Station is located near the township of Dalby. The APA Group is proposing to extend the capacity of the facility involving the installation of two new compression units. Sonus has been engaged to make an assessment of the environmental noise from the proposed extension to the Dalby Compressor Station. The assessment has consisted of: a survey of the existing acoustic environment and equipment on site; measurements of the noise from the existing compressor; a prediction of the noise from the new compressors on site at the closest sensitive receptors; a comparison of the predicted levels with the relevant environmental noise criteria, and; recommendations for acoustic treatment measures. The new gas compression units will comprise a compressor and the associated drive equipment. The gas compression units have the potential to operate continuously.

7 PAGE 5 2 DESCRIPTION OF EXISTING ENVIRONMENT The Dalby Compressor Station is located near the township of Dalby. At sensitive receptors, the acoustic environment is characterised by local and distant road traffic and natural noise sources such as wind in trees and birds. This results in a low noise environment, typical of a rural setting, except where a receptor is located in close proximity to the compressor station or roads. Appendix A provides the coordinates and approximate distances of the sensitive receptors considered in this assessment. The topography between the site and the sensitive receptors is relatively flat and it is expected that the topography will have negligible influence on the noise predicted at the closest sensitive receptors. Background noise levels (L A90 ) were measured at a location which was selected to be indicative of nearby residences. The location was not influenced by any existing fixed noise sources and was an equivalent distance to roads as most residences. The measurements were made between the 18 th and the 27 th of October, 2010, in accordance with the Queensland Department of Environment and Resource Management s (DERM) Noise Measurement Manual (the DERM Noise Measurement Manual). Using the measurement data obtained, the Rating Background Levels (RBL) were calculated in accordance with the Planning for Noise Control Guideline released by DERM. The calculated RBLs are summarised in Table 2.1. Table 2.1: Calculated Rated Background Levels. RBL db(a) Day Evening Night

8 PAGE 6 The RBL is determined from the lower tenth percentile of the L A90 noise level in the environment and effectively represents the lulls. That is, the RBL is representative of the quietest periods at the monitoring location. The calculated RBLs are considered to be representative of all sensitive receptors which are located in an environment dominated by distant traffic noise and natural noise sources such as wind in trees and birds. Under certain conditions, an existing compressor unit located at the station can contribute to the noise level at the sensitive receptors. Noise from the existing compressor was measured in the vicinity of the site on the 22 nd of October, These measurements were used to estimate noise from the existing compressor at the sensitive receptors As the RBL represents the lowest 10% of the L A90 noise level, existing noise sources will not contribute to the RBL unless noise levels are significant during upwind conditions. To determine the influence of the existing compressor on the RBL at each sensitive receptor, predictions have been conducted under mild upwind conditions. Based on the predictions, noise from the existing compressor only significantly influences the RBL at residence R1.

9 PAGE 7 3 METEOROLOGICAL CONDITIONS AND ATMOSPHERIC EFFECTS The CONCAWE noise propagation model is used around the world and is widely accepted as an appropriate model for predicting noise over significant distances. The CONCAWE system divides the range of possible meteorological conditions into six separate weather categories, from Category 1 to Category 6. Weather Category 1 provides best-case (i.e. lowest noise level) weather conditions for the propagation of noise, whilst weather Category 6 provides worst-case (i.e. highest noise level) conditions, when considering wind speed, wind direction, time of day, and level of cloud cover. Weather Category 4 provides neutral weather conditions for noise propagation. For the purposes of comparison, Categories 1, 2 and 3 weather conditions are generally characterised by wind blowing from the receptor to the noise source during the daytime with little or no cloud cover. Category 4 conditions can be characterised by no wind and an overcast day, whilst no wind and a clear night sky represent Category 5 conditions. Category 6 conditions can be characterised by a clear night sky and wind blowing from the noise source to the receptor. In the particular circumstances of this development, it is noted that the noise levels experienced at sensitive receptors in the vicinity of the facility will be significantly affected by the weather category. For example, higher noise levels would be expected at sensitive receptors with wind blowing from the site to the sensitive receptor (i.e. Category 5 or 6 conditions) than with wind blowing from the sensitive receptor to the site (i.e. Category 1, 2, or 3 conditions). Twelve months of historical meteorological data for Dalby were processed to determine the likelihood of each meteorological category. The times during which the wind speed is greater than 5m/s have been listed separately and excluded from each category, as it is anticipated that ambient noise levels (from wind in trees) would mask the noise from the site at these times.

10 PAGE 8 Tables 3.1 to 3.4 summarise the percentage of time in each meteorological category for the closest sensitive receptor located to the north of the site (most critical receptor), and for sensitive locations to the northeast, east and south of the site. Table 3.1: Distribution of meteorological categories for sensitive receptor located to the north of the site. Meteorological Category Total Percentage of Time in Each Category Wind Speed > 5m/s 16% 5% Category 1 1% 0% Category 2 10% 7% Category 3 17% 16% Category 4 24% 29% Category 5 23% 28% Category 6 9% 15% Percentage of Time in Each Category during Night-time Only Table 3.2: Distribution of meteorological categories for sensitive receptor located to the northeast of the site. Meteorological Category Total Percentage of Time in Each Category Wind Speed > 5m/s 16% 5% Category 1 2% 0% Category 2 12% 8% Category 3 26% 29% Category 4 24% 35% Category 5 12% 12% Category 6 8% 11% Percentage of Time in Each Category during Night-time Only Table 3.3: Distribution of meteorological categories for sensitive receptor located to the east of the site. Meteorological Category Total Percentage of Time in Each Category Wind Speed > 5m/s 16% 5% Category 1 2% 0% Category 2 13% 6% Category 3 22% 28% Category 4 25% 35% Category 5 15% 15% Category 6 8% 11% Percentage of Time in Each Category during Night-time Only

11 PAGE 9 Table 3.4: Distribution of meteorological categories for sensitive receptor located to the south of the site. Meteorological Category Total Percentage of Time in Each Category Wind Speed > 5m/s 16% 5% Category 1 1% 0% Category 2 5% 1% Category 3 18% 18% Category 4 23% 27% Category 5 22% 24% Category 6 15% 25% Percentage of Time in Each Category during Night-time Only For compliance testing, the DERM Noise Measurement Manual requires that the noise measurement be conducted during fine weather conditions with calm to light winds. Measurement during conditions conducive to sound propagation should only be conducted if the conditions are a true representation of the normal situation in the area. When conducting a noise prediction, it is therefore considered appropriate that the prediction is also made for fine weather conditions, unless conditions conducive to sound propagation are representative of the normal conditions in the area. To objectively determine whether the meteorological conditions conducive to sound propagation are a representation of the normal conditions of an area, reference is made to the Planning for Noise Control Guideline. The Planning for Noise Control Guideline states that the meteorological conditions conducive to sound propagation, such as temperature inversions (Categories 5 and 6) and downwind conditions will be a significant feature of the area if they occur for 30% of the time. Therefore based on Table 3.1, Categories 5 and 6 weather conditions are considered to be a feature of the area at the most critical receptor. Consequently, it is proposed that the assessment of noise at all sensitive receptors in the vicinity of the facility be made under worst-case (CONCAWE Category 6) meteorological conditions.

12 PAGE 10 4 CRITERIA The Environmental Protection (Noise) Policy 2008 has been used as the primary method of objectively assessing the noise from the proposal. However, reference is also made to the World Health Organisation (WHO) Guidelines, the DERM Planning for Noise Control Guideline and the DERM Assessment of Low Frequency Noise Draft Guideline. 4.1 Environmental Protection (Noise) Policy 2008 The Environmental Protection (Noise) Policy 2008 (the Policy) provides the management intent to control background noise creep as well as achieve acoustic quality objectives for sensitive receptors. A traditional approach to environmental noise has been to measure existing background noise levels 1 prior to a development and to set environmental noise criteria at a certain level above the existing background noise level. Where this methodology is used, background noise levels are measured over a period of time to incorporate a range of meteorological conditions. The background noise level used is at the lower end of the range of measured levels. One of the concerns about this methodology is that each development may increase the background noise level allowing more relaxed criteria for future developments. This theoretical phenomenon of the degradation of the acoustic environment with successive developments is known as background creep. For this development to contribute to background creep, successive developments would need to rely on background noise levels, which have been elevated by previous projects, to set less stringent criteria. 1 For the purposes of this report the background noise level is represented by the RBL.

13 PAGE 11 To control background creep, the Policy includes: To the extent that it is reasonable to do so, noise from an activity must not be (a) For noise that is continuous noise measured by L A90,T - more than nil db(a) greater than the existing acoustic environment measured by L A90,T ; or (b) For noise that varies over time measured by L Aeq,adj,T - more than 5 db(a) greater than the existing acoustic environment measured by L A90T. As the noise from the proposal is expected to be continuous, it is part (a) that applies. Based on the measured background noise levels, the criteria associated with controlling background creep are shown in Table 4.1. Table 4.1: Criteria to control background creep. L A90,T db(a) Day Evening Night Since the development of the WHO Guidelines, it has become more common for regulatory authorities to base environmental noise criteria on avoiding health and wellbeing impacts rather than comparison with background noise levels. The Policy includes acoustic quality objectives based on the WHO Guidelines. These are described in Table 4.2. Sensitive Receptor Table 4.2: The Environmental Protection (Noise) Policy acoustic quality objectives. dwelling (for outdoors) dwelling (for indoors 4 ) Note: Time of Day daytime¹ and evening² daytime and evening Acoustic Quality Objectives (db(a))* L Aeq,adj,1hr L A10,adj,1hr L A1,adj,1hr Environmental Value health and wellbeing health and wellbeing night-time³ health and wellbeing in relation to the ability to sleep * Measured at the sensitive receptor. ¹ Daytime is defined by the Policy as the period after 7am on a day to 6pm on the day. ² Evening is defined by the Policy as the period after 6pm on a day to 10pm on the day. ³ Night-time is defined by the Policy as the period after 10pm on a day to 7am on the next day. 4 In accordance with the WHO Guidelines, indoor noise levels can be converted to outdoor levels by the addition of 15 db(a) assuming windows being partially open for ventilation.

14 PAGE 12 The noise from the existing compressor is predicted to be 41 db(a) at residence R1 under worst case conditions. As the noise from the existing compressor dominates the noise level at residence R1, it is not relevant to assess noise from the proposed compressors against the RBLs at a location not influenced by the existing compressor. In accordance with the intent of the Policy, the total noise from the site (including the existing and proposed compressors) should achieve a level of 41 db(a) in order to prevent background noise creep. 4.2 Planning for Noise Control Guideline At locations not influenced by industrial noise sources, the DERM Guideline specifies a criterion based on the RBL, plus an adjustment of 3 db(a) for the conversion to an equivalent (L Aeq ) noise level. Therefore, based on the measured RBLs, the most stringent (night time) criterion is 29 db(l Aeq ) for residences R2-R9. At locations where industrial noise sources are present, the DERM Guideline protects against background noise creep by setting a criterion that results in no increase in the local noise level. In situations where there is no opportunity to reduce existing noise levels, noise from the proposed compressors should be limited to 10 db(a) below any existing noise source. However, it is expected that acoustic treatment incorporated in the expansion will also reduce the noise from the existing compressor at residence R1. Under these circumstances it is proposed that the total noise (existing and proposed compressors) from the compressor station is to achieve the existing level of 41 db(a), thereby achieving the intent of the DERM Guideline.

15 PAGE World Health Organisation Guidelines The WHO has developed guidelines 2 for community noise in specific environments. With respect to annoyance, the guidelines state: To protect the majority of people from being seriously annoyed during the daytime, the sound pressure level on balconies, terraces and outdoor living areas should not exceed 55 db L Aeq for a steady continuous noise. To protect the majority of people from being moderately annoyed during the daytime, the outdoor sound pressure level should not exceed 50 db(a) L Aeq. To avoid sleep disturbance, the WHO suggests that the equivalent noise level (L Aeq ) should be limited to 30 db(a) inside a bedroom at night. Based on the windows being partially open, the WHO suggests that to achieve the internal level described above, the equivalent noise level outside a bedroom window should be limited to 45 db(a). Sonus has conducted tests of the noise reduction achieved across the facade of a number of dwellings. These tests include a range of facade constructions from light weight transportable homes to masonry homes. The results of the testing indicate that with windows partially open for ventilation, the noise transfer is typically around 15 db(a). The tests confirms that the WHO noise reduction of 15 db(a) across a facade is appropriate. 4.4 Low Frequency Noise Draft Guideline The noise from the proposed new equipment is not dominated by low frequency noise (refer Table 5.1) but the propagation of sound over large distances attenuates the high and mid frequencies, leaving a greater low frequency component and therefore as a conservative approach, assessment against the suggestions of the Low Frequency Noise Draft Guidelines has been included. 2 Berglund, Lindvall and Schwela, 1999, Guidelines for Community Noise

16 PAGE 14 The draft guideline separates the assessment of low frequency noise based on the frequency content of the noise and whether the noise is tonal or broad band. Based on measurements of similar equipment at other sites, the noise experienced at sensitive receptors will not include a significant component of infrasound (less than 20Hz) and will not be tonal. For non-tonal, low frequency noise in the range of 20Hz to 200Hz, the draft guideline suggests that the noise is considered to be acceptable if the contribution of low frequency noise within a sensitive receptor (L pa,lf ) does not exceed 20 db(a) during the evening or night and 25 db(a) during the day. The low frequency noise transfer from outside to inside sensitive receptors varies significantly based on the construction of the dwelling. Sonus has recently conducted tests of the noise reduction achieved across the facade of a number of dwellings. The results from these tests indicate that the low frequency noise reduction, with windows partially open, ranges from 10 db(a) for a light weight transportable home to 20 db(a) for a well constructed masonry home. This assessment has been based on a noise reduction of 10 db(a), which represents a worst-case (conservative) assessment. 4.5 Summary of Criteria The Policy, the DERM Guidelines and the recommendations of the WHO Guidelines have been considered in determining appropriate criteria for the proposed extension. It is common practice for noise from industrial sources to be predicted as an equivalent level (L Aeq ), therefore the criteria provided in Table 4.1 require adjusting from the provided L A90 levels. A regularly accepted adjustment is an addition of 3 db(a) for the conversion of an L A90 to an L Aeq noise level, an example of which is contained within the Planning for Noise Control Guideline.

17 PAGE 15 With consideration to the existing ambient noise environment and the existing compressor located on site, it is proposed that that the following criteria are established to ensure compliance at each noise sensitive location: Residence R1: Noise from both the existing and proposed compressors to achieve an outdoor level of 41 db(a); and, Residences R2-R9: Noise from the proposed compressors to achieve a level of 29 db(a). Where the above criteria are achieved, the intent of the Environmental Protection (Noise) Policy 2008, the World Health Organisation (WHO) Guidelines and the DERM Planning for Noise Control Guideline will also be achieved.

18 PAGE 16 5 ASSESSMENT 5.1 Noise Sources It is proposed that two Solar Centaur 50 compression units are to be installed at the Dalby Compressor Station. Table 5.1 below contains sound power levels for each item of equipment provided by the manufacturer of the compressors. Table 5.1: Main noise sources and sound power levels Noise Source Unsilenced Combustion Air Inlet Unsilenced Combustion Exhaust Unenclosed Package Maximum Sound Power Level (db(a) re 1 pw) by Octave Band Frequency (Hz) Total (db(a)) Additional Acoustic Attenuation Noise from the operation of the new gas compression units at the sensitive receptors in the vicinity of the site has been predicted using the CONCAWE noise propagation model in the SoundPlan noise modelling software. The CONCAWE propagation model takes into account topography, ground absorption and meteorological conditions, and has been used and accepted around the world as an appropriate sound propagation model. In the noise model, flat ground was considered as the attenuation due to undulating ground surface is considered negligible at the closest sensitive receptor. Based on the predicted noise from the proposed compressors it is required that additional acoustic attenuation be applied to the standard measures included in Table 5.1. The additional acoustic treatment is required to ensure compliance with the relevant criteria and is summarised below:

19 PAGE 17 Replace the standard inlet silencer with a silencer that provides an equivalent acoustic performance to that provided in Table 5.2; Replace the standard exhaust silencer with a silencer that provides an equivalent acoustic performance to that provided in Table 5.2. A suitable example is a Colpro 750 series silencer; Enclose the package with the standard enclosure specified by the manufacturer, such that the sound power levels provided in Table 5.2 are not exceeded; Build an acoustic barrier from compressed fibre cement with a minimum thickness of 18mm, located no greater than 6m from the enclosed package. The barrier should block line of sight between the enclosed package and the closest residence and be at least 35m in length and a height of at least 1.5m above the height of the of the enclosed package and air inlet. The barrier should be sealed airtight from the ground to the full height of the barrier; and, Acoustic insulation should be installed on the acoustic barrier described above. The insulation should be 50mm thick with a minimum density of 32 kg/m 3. This insulation may be protected with a perforated material (such as sheet steel or fibre cement sheeting) with an open area of at least 15%, a diagram of the proposed construction is provided below. Weatherproof capping 50mm thick acoustic insulation with a minimum density of 32 kg/m 3 Compressor Station Side Perforated material (e.g. sheet steel, fibre cement sheet) with an open area > 15% spaced from the insulation to provide weatherproofing Acoustic Barrier

20 PAGE 18 Table 5.2: Additional Acoustic Treatment. Frequency (Hz) Total Inlet Silencer (Insertion Loss) (db) Exhaust Silencer (Insertion Loss) (db) Enclosed Package (SWL (db(a)) Alternatively, the criteria could be achieved without the use of a barrier adjacent to the new compressors by installing all three of the following additional measures: An acoustic enclosure around the proposed compressors that performs significantly better than the manufacturer s standard enclosure; An air inlet attenuator that performs significantly better than the manufacturer s standard attenuator; Additional attenuation to the existing compressor, which may take the form of a small barrier to block line of sight to the cooling fan. 5.3 Predicted Noise The noise levels outside of dwellings R2-R9 have been predicted under worst case meteorological conditions, from the operation of the new compressor units and the acoustic treatment incorporating the noise barrier. The noise level at each sensitive receptor is summarised in Table 5.3 and a noise contour is provided in Appendix B, based on the sound power levels of the equipment listed in Table 5.1 and the additional acoustic attenuation provided above.

21 PAGE 19 Table 5.3: Predicted Noise Level Outside the Dwellings. Sensitive Receptor Predicted Noise Level (db(a)) R2 28 R3 26 R4 23 R5 21 R6 18 R7 15 R8 16 R9 18 In addition, the low frequency noise level inside dwellings R2-R9 is below 20 db(a). Therefore, it is predicted that the compressor station will comply with the low frequency noise draft guideline at each of these dwellings. The noise level at residence R1 has been predicted under worst case conditions, due to the simultaneous operation of the existing and proposed compressors. The total predicted noise level from the compressor station is 40 db(a), less than the existing noise level at residence R1. It is predicted that the low frequency noise level inside residence R1 from the operation of the compressor station following installation is no greater than the level prior to the extension.

22 PAGE 20 6 CONCLUSION An assessment has been made of the noise from the proposed compressors at the APA Dalby Compressor Station. The assessment considered noise from both the existing and proposed compressors at the facility. Based upon the Environmental Protection (Noise) Policy, appropriate conditions for noise levels at sensitive receptors have been determined, taking into consideration the existing acoustic environment. The proposed noise conditions for the operation of the facility are: Residence R1: Noise from both the existing and proposed compressors to achieve an outdoor level of 41 db(a); and, Residences R2-R9: Noise from the proposed compressors to achieve a level of 29 db(a). The noise at the sensitive receptors in the vicinity of the site from the operation of the compressor station has been predicted. The predictions indicate that the proposed noise conditions for the operation of the facility will be achieved at all sensitive receptors, with a feasible level of acoustic treatment applied. The acoustic treatment outlined in this report comprises: Attenuators fitted to the air inlet and exhaust of the proposed compressors; Enclosing the proposed compressors with a standard package specified by the manufacturer; and The construction of an acoustic barrier adjacent to the proposed compressors.

23 PAGE 21 Alternatively, the criteria could be achieved without the use of a barrier adjacent to the new compressors by installing all three of the following additional measures: An acoustic enclosure around the proposed compressors that performs significantly better than the manufacturer s standard enclosure; An air inlet attenuator that performs significantly better than the manufacturer s standard attenuator; and, Additional attenuation to the existing compressor, which may take the form of a reduced barrier to block line of sight to the cooling fan. With the above acoustic treatment in place, the APA Dalby Compressor Station will satisfy the intent of: The Environmental Protection (Noise) Policy 2008; The World Health Organisation (WHO) Guidelines; The DERM Planning for Noise Control Guideline; and, The DERM Assessment of Low Frequency Noise Draft Guideline.

24 PAGE 22 REFERENCES Berglund,B., Lindvall, T., and Schwela, D.H Guidelines for Community Noise. World Health Organisation, Geneva. DERM Guideline Planning for noise control. Department of Environment and Resource Management, Queensland Government, Brisbane, Queensland. DERM Draft Guideline - Assessment of Low Frequency Noise. Department of Environment and Resource Management, Queensland Government, Brisbane, Queensland. Manning, C.J The propagation of noise from petrochemical complexes to neighbouring communities. CONCAWE - The oil companies international study group for conservation of clean air and water Europe. Queensland Government Environmental Protection (Noise) Policy Reprint No.1. Queensland Government, Brisbane, Queensland. Queensland Government Noise Measurement Manual. Third Edition. March. Environment Protection Authority, Queensland Government, Brisbane, Queensland.

25 PAGE 23 APPENDIX A: SENSITIVE RECEPTORS IN THE VICINITY OF THE FACILITY Table A1: Coordinates and Approximates Distances of the Sensitive Receptors from the Site. Sensitive Receptor Easting (WGS 84) Northing Approximate Distance from the Site (m) R R R R R R R R R

26 PAGE 24 APPENDIX B: NOISE CONTOUR R9 R8 R7 R6 R1 R3 R4 R5 R2