Use of membranes and verification of gas protection systems
This event will explain how verification should be carried out for hazardous ground gases and how the choice of membrane can affect this, particularly for VOC contamination.
Ticket information
This event is free to attend for LACL and BRMF members
This event costs £150 to attend for Non members
When?
26 March 2015, 09:30am - 12:15pm
Background
Plastic membranes have been used as VOC barriers for many years in the UK. The nature of the material, its durability, the vapour transport mechanisms, tests and performance factors will all affect the effectiveness. However, verification procedures for membrane also play a key part of the risk management process for hazardous ground gases.
It is clear that there are differences in the standard of installation, testing and verification throughout the industry. In particular, attention needs to be given to the loss of integrity of plastic membrane gas barriers during the construction process. This is also partly because of inadequate understanding of the membrane of some hazardous ground gases such as VOCs.
CIRIA reports: C748, Membranes as VOC barriers and C735 Good Practice on the testing and verification of protection systems for buildings against hazardous ground gases, provide clarity on the application of membrane and how to carrying out integrity testing of gas protection systems and in the preparation of verification reports. This will ensure that the mitigation of risks related to hazardous ground gases can be demonstrated with an appropriate degree of certainty, thus contributing to the safe and effective redevelopment of land affected by contamination.
Who should attend?
Local authorities, contractors and consultants
Programme
09:30 Webinar Forum available
10:30 Introduction
Introduction to the two recent publications. Structure of the webinar
10:35 Membranes as VOC Barriers (CIRIA C748)
Use of membranes as VOC barriers. Description of the function of membranes in such applications, vapour transport mechanisms, tests and performance factors. Issues of membrane durability and selection.
10:55 Testing and Verification of gas protection systems (CIRIA C735)
Introduction to the Guidance. Description of need and the five most common / main issues. Definition of gas resistant membranes. How verification of gas protection systems fits with the regulatory framework. Integration of C735 with the new BS8485.
11:15 Verification Procedures
Verification planning and description of the risk based approach. The verifier – competence, independence and tools. Installation workforce – qualification and experience.
11:30 Integrity testing
Techniques available for membranes and seams. Specification of integrity tests. Consideration of issues regarding test type. The hierarchy of testing in the risk based approach.
11:45 Verification Reporting and recommendations of the project
The objectives and contents of verification of gas protection systems. Outline of the main recommendations arising from the research.
11:55 Q&A
Responses to any queries received during the webinar.
12.15 Close
Booking
If you are unable to book online, please contact Patrick Williams on 0207 549 3308
0207 549 3308 or return the booking form by post or fax.