There could also be pathways to controlled waters to consider in
addition to human health when importing material.
I wasn't going to mention the haulier but I think we had a report done
by them last month.
John Allison
This email is personal. It is not authorised by, or sent on behalf of,
Knowsley MBC. This email is the personal responsibility of the sender.
-----Original Message-----
From: Contaminated Land Management Discussion List
[mailto:[log in to unmask]] On Behalf Of adamc
czarnecki
Sent: 09 February 2006 12:38
To: [log in to unmask]
Subject: Re: Benzo(a)pyrene
We have been informed by several LA's not to use SNIFFER particularly as
it does not have any dermal pathway and because of the limitations of
the model with respect to plant uptake.
We have used CLEA UK but this also provides very low numbers for
residential end use scenario although it is useful to be able to model
the dermal contact pathway without having to use the algorithms in CLEA
Briefing Note 1 in a separate calculation.
There is no avoidance of the fact that the DEFRA/EA tox information for
BaP is very very conservative.
Interesting who is conducting risk assessment these days. Even hauliers
now!
Adam Czarnecki
Director
REC Ltd
Osprey House
Broadway
Manchester
M50 2UE
Tel: 0161 868 1300
Fax: 0161 868 1301
Email [log in to unmask]
www.recltd.co.uk <http://www.recltd.co.uk/>
Rob Ashby wrote:
>Nik,
>
>We have used SNIFFER to calculate SSACs for a range of parameters.
>However with B{a)P I think that care is required when using SNIFFER.
>
>SNIFFER does not include a dermal uptake pathway, but incorporates a
>check to identify whether dermal is likely to be significant. The
check
>indicates that dermal uptake is significant for B(a)P. Therefore we
>have also incorporated a number of additional calculations which are
>based upon data published in CLR10 and CLEA Briefing Note 1.
>
>It is my guess that if your haulier has calculated a threshold of
7mg/kg
>B(a)P, he has not included all the potential exposure pathways. Our
>assessment procedure for apartments, which is based upon residential
>exposure, without up-take from vegetables, also indicates a SSAC
between
>1mg/kg and 2 mg/kg B(a)P.
>
>Trust this helps
>
>Rob Ashby
>Consulting Group Manager
>Enviros Consulting
>Tel 0161 874 3656
>Mob 07800 624 013
>
>Private and Confidential
>This message may contain private and confidential information. If you
>are not the intended recipient, please inform us and delete this
message
>immediately. Although Enviros believes that this email and any
>attachments are free of any virus or other defect which may affect a
>computer, it is your responsibility to carry out appropirate virus and
>other checks to ensure that this message and any attachments do not
>affect your systems or data and Enviros does not accept any
>responsibility for any loss or damage arising in any way from its use.
>Any views or other information in this message which do not relate to
>our business are not authorised by us, nor does this message form part
>of any contract unless so stated.
>
>
>
>
>-----Original Message-----
>From: Contaminated Land Management Discussion List
>[mailto:[log in to unmask]] On Behalf Of Nik
>Reynolds
>Sent: 08 February 2006 15:39
>To: [log in to unmask]
>Subject: Benzo(a)pyrene
>
>We are currently reviewing the threshold proposals for topsoil for
>importation onto one of our clients sites. Normally we specify between
>1
>and 2mg/kg depending upon the proposed landuse, however we have been
>informed by our clients haulier that we are too conservative and an
>acceptable threshold of 7mg/kg for apartments is possible using a
>modified
>SNIFFER assessment. We do acknowledge that obtaining these low
>parameters
>is extremely difficult and does result in the rejection of much
imported
>material.
>
>If this is so, fantastic, however thought i'd see if anyone has come
>across
>this?
>
>We have seen a risk assessment for 10mg/kg, however found that the
index
>dose had been incorrected inputed.
>
>Appreciate any assistance any one can give. Maybe this could start to
>become part of the threshold banding to be used in the real world!!!!
>
>
>
This e-mail and any attachments are confidential and may also be privileged.
If you are not the intended recipient you should not copy or use any part of it or disclose its contents to any person. If you have received it in error please notify the sender immediately.
This e-mail and any attachments are believed to be virus free but it is the recipient's responsibility to ensure that they are.
|