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ENVIRONMENT & SUSTAINABILITY


Brian Graham, director of Soil and Water Remediation, details a recent excavation project. S


oil and Water Remediation (SAWR) has recently over-


seen the excavation and movement of in excess of 13,000m3 of theo- retically contaminated soils at a railway facility.


Prior to movement, the material was classified and then sent to an appropriate licensed disposal or treatment facility.


Wherever it was deemed feasible, through this extensive sampling and sentencing regime, SAWR en- sured that the maximum volume of impacted material allocated for off-site disposal (due to construc- tion restraints), was sentenced for off-site treatment and then subse- quent reintroduction to the con- struction cycle.


Through this process, in excess of 40% of excavated soils were uti- lised for re-use.


During the course of works on site, a waste exemption was granted by the regulator for re-use of material in an area on the site.


SAWR conducted site investiga- tion work and assessment on the soil in a specific part of the site to determine whether the mate- rial within this area was generally uncontaminated and suitable for re-use under the waste exemption.


This investigation revealed the ma- terials to be within the acceptable parameters.


Throughout the remainder of the excavation works, SAWR were re- sponsible for ensuring that the ma- terial being moved was suitable for re-use under the waste exemption.


This was done by SAWR supervis- ing excavations and carrying out regular sampling of the material.


SAWR prepared the waste exemp- tion area and managed the place- ment of material within it.


Any material deemed not suitable for re-use was segregated while analysis was carried out. Where analysis confirmed it was not ac- ceptable for reuse on site, appro- priate off-site disposal was ar- ranged.


Due to the location of the site on a busy road, close to a primary school, it was important to ensure that suitable traffic management measures were in place during the export of material off site to control the significant volume of traffic en- tering and leaving the site.


FOR MORE INFORMATION Brian Graham, Director T: 01329 846824 E : bgraham@sawr.co.uk W : www.sawr.co.uk


42 | rail technology magazine Jun/Jul 11


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