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As Andre said, permeable granular rubber cover poured around works well, doesn’t compromise tree health, and comes in a variety of colours > On 1 Aug 2018, at 12:16, André Gilleard <[log in to unmask]> wrote: > > Anona > > I’ve had this issue many times. > If you add soil over tree root zone then you could adversely affect tree health. > > Your best bet is to delete the topsoil layer and use some form of rubberised surfacing (or similar play surface) that will allow water in, but will cut the pathway….. or just wooden deck over the root zone. > That way there is also no need to involve inspections at least. > > Make it a feature bench!… <image006.jpg> > > Regards > > André Gilleard SiLC CSci CEnv BEng(Hons) QP# > Associate Director & Head of Ground Engineering (Bristol) > For and on behalf of clarkebond > > T: +44 (0) 117 945 3254 (DD) > T: +44 (0) 117 929 2244 (switchboard) > M: +44 (0) 7527 389 000 > > <image008.jpg> <image010.jpg> <image012.jpg> > > <image014.jpg> <image023.png> > > (Read about: - Ground Engineering the £37M Gulliver’s Valley Resort, over an opencast coal mine of up to 75m depth. > - Gas, settlement and groundwater quality risks for a new retail park upon a Cellophane landfill site > - 0.75Mm3 filling of a 30-35m deep quarry in 12 months, with housing construction starting 12wks after filling. Shortlisted for Award) > > Registered in England & Wales No. 7775761. The information in this e-mail and any attachments is confidential and may be subject to legal professional privilege. It is intended solely for the attention and use of the named addressee(s). > If you are not the intended recipient, or person responsible for delivering this information to the intended recipient, please notify the sender immediately. > Unless you are the intended recipient or his/her representative you are not authorised to, and must not, read, copy, distribute, use or retain this message or any part of it. > P be green - keep it on the screen. <image015.jpg> André Gilleard #: Qualified Person No.0086 (CL:AIRE Definition of Waste assessment) > > From: Contaminated Land Management Discussion List [mailto:[log in to unmask]] On Behalf Of Williams, Clive R > Sent: 01 August 2018 12:07 > To: [log in to unmask] > Subject: Re: School soft landscaping in root protection zone > > Sounds sensible enough, you’re breaking the linkage by removing the pathway; pretty standard stuff > Regards > Clive Williams > BSc MSc CGeol SiLC SQP > > Associate > Contaminated Land Specialist > T +44 (0)29 2046 7867 > [log in to unmask] > > > From: Contaminated Land Management Discussion List <[log in to unmask]> On Behalf Of Arthur, Anona > Sent: 01 August 2018 12:01 > To: [log in to unmask] > Subject: School soft landscaping in root protection zone > > 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 6th 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 > -- > 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 > > Please consider the environment before printing this email. > > -- > > <image016.png> <image017.png> <image018.png> <image019.jpg> > > -- > > > > This e-mail may contain information which is confidential, legally privileged and/or copyright protected. 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