Dear Jo,
Many thanks for the response regarding the parameters to be included within
the CLEA database.
Is there any potential for phthalates, PCB (generic TCDD as well as well
known risk drivers i.e. PCB118), carbazole, dibenzofuran to be included
within either the CLEA database or future database updates. In the North
West these are regular friends that pop up on a frequent basis and very
little sound science appears to be available for these compounds. I
acknowledge that Lancs University have a database for TCDD and PCB118,
however there are large gaps with data required for the CLEA assessment.
With regard to BTEX and TPH, I acknowledge what has been stated with regards
to the US TPHCWG, however I have noted that the Koc value for Benzene is
incorrect in the fate and transport document, which I presume is the
appropriate reference document approved by the EA for CLEA use. As this
compound is hydrophobic, the value is 1.83 rather than 2.13.
Would it not be appropriate for the EA to produce TPH parameter value (even
though they are the same as TPHCWG) to have all the data derived from 1 No.
EA source and to ensure all parameters are set to the correct temperature
and units. This would also provide confidence for statutory bodies when
reviewing hydrocarbon risk assessment. Considering this data is readily
available it should not take the EA a considerable time to present this data
in a manner to which they are happy with.
I have noted that the xylene is split into the 3 isomers. Would it be
possible for an EA approved mix to be published. This has been undertaken
to a degree within the new RBCA software.
Regards
Nik
Mr N Reynolds BSc(Hons), MSc, FGS
Environmental Geologist
-----Original Message-----
From: Jeffries, Jo [mailto:[log in to unmask]]
Sent: 15 October 2008 12:23
To: Nik Reynolds
Cc: [log in to unmask]
Subject: RE: CLEA 1.03
Dear Nik,
The parameters that will be covered by the report are those that are
required within the chemical database of the CLEA model; excluding
toxicological data (which will be provided in chemical specific
toxicological reports) and dermal absorption fractions, soil-to-dust
transport factors and parameters related to plant uptake (which will be
provided in chemical specific SGV reports where the default data or
modelling has not been used). The report will provide temperature adjusted data.
The report will include the following organic chemicals; Aldrin, Atrazine,
Azinphos-methyl, Benzene, Benz[a]anthracene, Benzo[b]fluoranthene,
Benzo[k]fluoranthene, Benzo[ghi]perylene, Benzo[a]pyrene, Carbon disulphide,
Chlorobenzene, Chloroethene, 2-Chlorophenol, α-Chlorotoluene,
2-Chlorotoluene, Chrysene, DDT, Dibenz[ah]anthracene, 1,2-Dichlorobenzene,
1,3-Dichlorobenzene, 1,4-Dichlorobenzene, 1,2-Dichloroethane,
2,4-Dichlorophenol, Dichlorvos, Dieldrin, α-Endosulfan, β-Endosulfan,
Ethylbenzene, Fenitrothion, Fluoranthene, Hexachlorobenzene,
Hexachloro-1,3-butadiene, α-Hexachlorocyclohexane, β-Hexachlorocyclohexane,
γ-Hexachlorocyclohexane, Indeno[123-cd]pyrene, Malathion, Naphthalene,
Pentachlorobenzene, Pentachlorophenol, Phenol, 2-Propanone, Pyrene,
1,2,3,4-Tetrachlorobenzene, 1,2,3,5-Tetrachlorobenzene,
1,2,4,5-Tetrachlorobenzene, 1,1,1,2-Tetrachloroethane,
1,1,2,2-Tetrachloroethane, Tetrachloroethene, Tetrachloromethane,
2,3,4,6-Tetrachlorophenol, Tetraethyl lead, Toluene, Tributyl tin oxide,
1,2,3-Trichlorobenzene, 1,2,4-Trichlorobenzene, 1,3,5-Trichlorobenzene,
1,1,1-Trichloroethane, Trichloroethene, Trichloromethane,
2,4,6-Trichlorophenol, α,α,α-Trichlorotoluene, Trifluralin, m-Xylene,
o-Xylene, p-Xylene.
The report will also provide information and guidance on unit and
temperature conversions.
Regards
Jo Jeffries
Human Health Principal Scientist
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