Monitoring Solutions. Sound Environmental Solutions

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1 Monitoring Solutions COMPLIANCE ACOUSTICS MONITORING Sound Environmental Solutions LAB TESTING ENVIRONMENTAL

2 SRL has done an excellent piece of technically challenging and innovative work predicting noise and vibration from trains running on the Temporary Construction Railway and identifying those areas where it was necessary to install the enhanced track design (track type B). SRL collaborated closely with Crossrail as well as other contractors, together with their acoustic consultants, to develop a prediction methodology and then validate it through on-site measurement. The level of achievement, demonstrating compliance against Crossrail s Environmental Minimum Requirements and parliamentary assurances on ground-borne noise and vibration, is a huge success considering that Crossrail is the largest construction project in Europe and given that the tunnels pass under densely occupied parts of London Colin Cobbing Noise and Vibration Manager, Crossrail

3 Pedigree SRL was formed in 1967 and has been a leader in the field of acoustic design, testing and long and short term monitoring. Experience We employ some of the most experienced consultants in the industry. Our large team includes experts with backgrounds in Local Authority, M&E services and architecture as well as pure acoustics. Specialist Knowledge Our team has worked on many of the major UK infrastructure and rail schemes including Crossrail C305, Stockley Junction interchange, DLR, HS1, HS2 enabling works and CP5 as well as commercial and residential schemes. Working with the client and Local Authority we are able to position our noise/vibration/air quality and dust monitors to provide the most relevant data. To prevent exceedances of pre set monitoring levels we are able to supply real-time data feeds and alerts via SMS messaging to site managers. Resources We are one of the largest independent acoustic consultancies in the UK. We have offices strategically placed in London, Birmingham, Manchester and Sudbury where our testing laboratory is also located. We have an experienced team to organise the installation and maintenance of remote noise, vibration and dust monitoring equipment. If a manned site survey is required, we are able to provide this service as well. Reports from the monitoring can be configured to our client s requirements to fit in with submissions to Local Authorities environmental teams. SRL Technical Services 3

4 SRL Technical Services: Liaise We collaborate with all parties to develop the best project specific solutions everytime. Measure We measure the noise, vibration, dust and air quality levels to allow our clients to have the data to demonstrate conformity with development conditions. Analyse We use our collective expertise and the latest analytical tools to get you precise results. Monitor Long term, short term and manned monitoring of noise, vibration, dust and air quality with associated reports, alert messaging and real time data. 4 SRL Technical Services

5 Model We build 3D computer models of your sites and use these models to predict noise & vibration impacts. Mitigate If the results of any of our work highlight a potential risk, we give you practical and pragmatic solutions. We know that time is critical on these projects. Gain Consent We can help you get your site working and keep it working, including works out of hours, weekends and Bank Holidays. We will tell you what is likely to be acceptable to the Local Authority. Understand We work with multiple stakeholders every day. We know that understanding how their needs impact your scheme is critical to your success. SRL Technical Services 5

6 Case Study 70 Mark Lane, London Located on a key site in the City of London, this new commercial development provides 15,800m 2 of office space over 15 storeys along with ground floor retail units and a single basement level. The building features large enclosed south facing terraces over its six uppermost floors. Background This was a prestigious development in the City of London within the Insurance district. Developers Mitsui Fudosan and Stanhope plc were developing a 15 storey glass curtain wall building valued at 60 million. We were directly employed by the contractor to monitor noise, vibration and dust through the demolition period and into significant works of the construction phase. Our Challenge The location of the new development in the heart of the densely populated Insurance district within the centre of London posed considerable potential problems. The Local Authority had placed onerous conditions on the developer regarding permissible noise, vibration and dust levels so that any disturbance to existing businesses was kept to the minimum. During the demolition and construction phase, a proactive approach was taken to minimising and monitoring the potential noise/vibration and dust impact on surrounding commercial and sensitive receivers. We worked with the nearest sensitive receiver, Saint Olave s Church, to minimise any disturbance to them and the nearby Wardens home. 6 SRL Technical Services

7 Solution The text alert system to a site based mobile phone, to alert staff if the criteria were being exceeded, allowed our client to react immediately to mitigate any disturbance. We provided two vibration loggers and one combined noise/dust monitor to cover the whole site, with installation, maintenance and weekly reporting on each parameter for each logger for over a year. Vibration logging We were able to locate our units within the closest sensitive receiver to the works on the ground floor of St Olave s Church and in the basement of the rectory. Both units were set up so we could remotely download all the measured data to a dedicated secure server at our head office. One report was provided for all the loggers data combined and was written in a format that could be handed directly to the local authority if required. Data was presented as a VDV (16 hour) and PPV (10 hour). In addition hourly PPV values were also reported. The equipment used was a web based system which allowed our client to log into the results window and interrogate the current and historic data. Innovation To allow us to measure different vibration parameters we used a combination of single axis and triaxial accelerometers. With these instruments being located in the crypt of the church we needed to add an aerial booster so that a text alert system for notification of any exceedances in the noise and particulate concentration would notify site staff. A combined noise and dust logger was used at this site. This provided a cost saving to our client whilst still providing monitoring of all the parameters required. We provided individual reports for noise (LAeq ) and dust (PM10 and TSP). The reports were supplied weekly and covered the 10 hour working day whilst also providing hourly data. Noise / Dust logging We used one unit located within the site hoarding close to commercial receptors. This type 1 noise meter was installed and maintained by SRL. The data was remotely downloaded to a dedicated secure server at our head office. Again we used a web based system which allowed our client to log in to see real time data and historical measurements. Awards The project was honoured with a Gold Considerate Constructors Scheme National Site Award in Mark Lane also received a Highly Commended Gold Award from the City of London s Considerate Contractors Scheme. SRL Technical Services 7

8 As we come to our last week of tunnelling, I write to thank you for your considerable contribution to our success. That success can be measured in the very small number of adverse comments received during tunnelling from residents and other parties along the route. Whilst the design of our temporary construction railway was essential in reducing the potential impact of ground-borne noise, your assessment and monitoring of ground-borne noise and vibration was essential in securing the support from our client, Crossrail and from key stakeholders such as the City of London and the Barbican Centre. The demands of the client s acoustic advisers highlighted the technically challenging aspects of your studies and I commend you for your perseverance in addressing these demands and in working with other contractors and their acoustic consultants to achieve consensus. It is particularly pleasing to hear our client congratulate you and your team for the monitoring, predictions, validation of the predictions and assessments you have done to support the tunnelling of the Dragados Sisk Joint Venture for Crossrail Bruno Guillaume Environmental Manager, Dragados Sisk JV

9 Case Study Network Rail Stockley Junction Carillion have built a 1000 tonne rail flyover close to Heathrow. The 120m long structure is the largest single span bridge to be built anywhere to the west of London since Brunel s era. The flyover will allow the Heathrow Express and Crossrail trains to join the Great Western Railway without any delays. Background Building a 1000 tonne structure always had the potential to create noise and vibration, and doing it in a populated part of London meant there was a possibility for complaints. Much of the construction work was done at 15m above ground level which meant that not only was the work more visible, but there was little or no acoustic screening between the work and the sensitive receptors. Added to this was the fact that much of the piling had to be done during night time possession periods to minimise disruption to the existing operating rail services. SRL was employed to tackle the scheme s noise and vibration challenges, to allow it to be delivered on time and on budget. SRL Technical Services 9

10 Case Study Network Rail Our Challenge Meeting the critical timeline was imperative on this scheme. Construction work had to happen without stoppage or delay. This meant identifying and then mitigating the risk of construction noise and/or vibration complaints before the work started. The site was large and in a densely populated part of London. Before we could start works on site we had to gain Local Authority consent for our Section 61 application. Once consent was granted, we produced a comprehensive noise and vibration management plan that would allow the works to run smoothly. To demonstrate compliance we developed a robust scheme of noise and vibration monitoring to satisfy all the relevant stakeholders. Collaboration We worked together with the Local Authority, Network Rail, our client and the local community to carry out an extensive exercise to determine and agree upon the most appropriate noise and vibration receptor positions for both the assessments and the monitoring. We collaborated with the delivery team to assess the construction methodology from a noise and vibration perspective. This allowed us to mitigate for potential issues during pre-construction. Innovation We developed bespoke 3D computer noise modelling software to predict the noise impact from construction work to the noise sensitive receptors. The software allowed us to critically assess the client s proposed construction methodology and feedback comments regarding the scheduling of specific works and also investigate the impact of alternative construction methods. Solutions We identified a number of specialist engineering companies operating large factories on the edge of the site, including nanotechnology facilities that are particularly sensitive to vibration. Our comprehensive noise and vibration monitoring solution sent text alerts directly to the site agents whenever the noise or vibration criteria were exceeded. This allowed our client to react instantly and investigate any potential issues as and when they happened. A regime of attended monitoring was employed during possession periods to provide both on-site support during the actual work and also demonstrate to the Local Authority that noise and vibration control was an important consideration to the delivery team. We developed a close working relationship with the Local Authority allowing us to gain all necessary consent for the works through multiple Section 61 applications. 10 SRL Technical Services

11 We approached SRL because we had experience of working with them for many years across many sectors. They are experts in the field of acoustics and helped us gain consent for the work by preparing multiple Section 61 applications. They also worked with us to provide a successful noise and vibration monitoring solution to demonstrate compliance, for the duration of the Stockley Junction project. Having SRL on board meant that we could get on with our work knowing that any issues with noise and vibration were handled Elwen Tasker Environmental Manager, Carillion

12 London Office 70 Cowcross Street London EC1M 6EJ T: +44 (0) Birmingham Office Cornwall Buildings 45 Newhall Street Birmingham B3 3QR T: +44 (0) Manchester Office Lynnfield House Church Street Altrincham Cheshire WA14 4DZ T: +44 (0) Southern Office & Laboratory Holbrook House Little Waldingfield Sudbury Suffolk CO10 0TF T: +44 (0) South Africa Office Ground Floor Liesbeek House River Park Gloucester Road Mowbray 7700 South Africa T: +27 (0) E: Technical Services Limited