Remediation of Brownfield Land

This document provides guidance on the use of Stabilisation/Solidification (S/S) for the remediation of land affected by contamination, as commonly found on brownfield land or derelict sites. Cement and lime are widely used for stabilising natural soils to improve their engineering properties, and specifications and extensive guidance are available. Although S/S can be considered a natural extension of soil stabilisation techniques, it is more difficult to design, plan and implement: this is because of the potentially complex nature of soils and contaminants within brownfield or derelict sites. Accepting that the use of S/S is not as widespread as soil stabilisation, it has regularly been successful in remediating many types of derelict or contaminated land. A necessary precursor to any remediation is a risk assessment to establish the extent and nature of any hazardous contamination and so develop a remediation strategy to manage the risk. It is at this stage that S/S is assessed as a remediation option. Where S/S is found practicable, a full remediation design is carried out through a combination of laboratory and site trials before full site implementation. This document is an overview of the whole process, from the initial risk assessment to completion of the remediation. It is for general guidance only and must not be considered a substitute for the necessary site-specific documentation. All remediation work undertaken on land affected by contamination must be carried out to a site-specific working plan, drawn up by skilled professionals in liaison with main contractors or specialist subcontractors. This site specific working plan includes a comprehensive set of remediation objectives that are agreed with the Regulator appropriate to the site. S/S is a useful technique for treating particular wastes before disposal to landfill and parts of this document may be helpful for those involved with waste treatment. However, the general use of S/S for waste treatment is such a large and complex topic that it is outside the scope of this guidance.

MAGAZINE - Building & Construction Canada Magazine Spring 2011

ISO 16730 Fire safety engineering — Assessment, verification and validation of calculation methods

This International Standard provides a framework for assessment, verification and validation of all types of calculation methods used as tools for fire safety engineering. It does not address specific fire models, but is intended to be applicable to both analytical models and complex numerical models that are addressed as calculation methods in the context of this International Standard. It is not a step-by-step procedure, but does describe techniques for detecting errors and finding limitations in a calculation method. This International Standard includes
⎯ a process to ensure that the equations and calculation methods are implemented correctly (verification) and that the calculation method being considered is solving the appropriate problem (validation),
⎯ requirements for documentation to demonstrate the adequacy of the scientific and technical basis of a calculation method,
⎯ requirements for data against which a calculation method's predicted results shall be checked,
⎯ guidance on use of this International Standard by developers and/or users of calculation methods, and by those assessing the results obtained by using calculation methods.

Residential cellular concrete buildings

Concrete cellular structures are used extensively for residential buildings. In concept they are structurally simple but they require attention to detail to realise the benefi ts of ease of construction and economy.
This guide is written for the structural engineer who has knowledge of building structures in general but who has limited or no experience of designing concrete cellular structures. It highlights areas that require close coordination between the structural and services engineers, the architect and importantly the system supplier. It also provides guidance on selecting an appropriate solution, sizing the structure and carrying out detailed design. Detailing considerations are explained, some of which have to be considered at the early stages of a project to achieve an effi cient building confi guration.