Hi All

 

Has anyone come across remediation methods within a root protection zone?

 

We have a Secondary School where 2 samples out of 11 detected elevated concentrations of lead that exceeded the threshold criteria for a POS(resi) land use scenario. However, given that the soft landscaped areas are within a root protection zone, the Consultants are considering an alternative method to break the pathway between the contaminated soils and the future users as below.

 

-          Installation of a terram / geotextile barrier fabric overlying the existing soils

-          Dress of approximately 150mm of clean, certified and validated imported topsoil

-          Inclusion of details within the school’s health and safety plan to ensure groundsmen understand the need to maintain the integrity of the terram

-          Annual inspection of the soft landscaped area by groundskeeper and top up of topsoil if required

 

The assumed proposed use of this open space will be an informal recreational area and have institutional controls from the school (Accessed by staff and students, presumed 6^th formers, and not fenced off or used as a formal play area).

 

Do you feel that this measure would be sufficient to break the assumed pollutant linkage?

 

I would be grateful if you have any experience or comments on the above.

 

Many thanks

 

Anona

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Anona Arthur  
Environmental Health Officer / Contaminated Land Officer
Environmental Health, Business and Consumer Services                                         
Supporting Communities
London Borough of Camden


Telephone: 020 7974 2990
Fax: 020 7974 6940
Web: camden.gov.uk

8th Floor
5 Pancras Square
London N1C 4AG

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