What was found in the Billet Road Contaminated Landfill ?

 

Industrial, Domestic, potentially clinical waste, found [SD 2.4.10]

Landfill contaminated with:

Acenaphthene	Fluorene	TPH Aliphatic >EC10 - EC12
Acenaphthylene	Free Product	TPH Aliphatic >EC12 - EC16
Arsenic	Gross Phenol	TPH Aliphatic >EC16 - EC21
Asbestos	Hexavalent Chromium	TPH Aliphatic >EC21
Asbestos amosite fibres	Hydrocarbons	TPH Aliphatic >EC5 - EC6
Asbestos chrysotile	Indeno(1,2,3-c,d)pyrene	TPH Aliphatic >EC6 - EC8
Benz(a)anthracene	Lead	TPH Aliphatic >EC8 - EC10
Benzene	Mercury	TPH Aromatic >EC10 - EC12
Benzo(a)pyrene	Methane	TPH Aromatic >EC12 - EC16
Benzo(b)fluoranthene	Naphthalene	TPH Aromatic >EC16 - EC21
Benzo(b)fluoranthene	Nickel	TPH Aromatic >EC21 - EC35
Benzo(g,h,i)perylene	PAH (total)	TPH Aromatic >EC5 - EC7
Benzo(k)fluoranthene	PAH **	TPH Aromatic >EC7 - EC8
Cadmium	pH	TPH Aromatic >EC8 - EC10
Chromium	Phenanthrene	Volatile TPH & BTEX
Chrysene	Phenol	Xylene
Cooper	Phytotoxic Metals	Zinc
Cyanide	Pyrene	Zootoxic Metals
Dibenz(ah)anthracene	Sulphate
Ethylbenzene	Toluene

Numerous exceedances of applicable human health criteria were encountered in several PAH compounds. These exceedances are summarised below [SD 7.1.8.1]

Hazadous Gas/Vapours in soil. The monitoring indicates that the site may fall into NHBC Red Classification based on Methane.

Pits tended to be unstable and therefore the maximum depth of the waste deposits was not proven in all cases. [SD. 3.2.3]

Whilst there is some uncertainty due to the instability [SD 3.2.11]

the groundwater distribution is heterogeneous and there does not appear to be a clearly defined water table. [SD 3.1.3]

The base of the made ground is considered to be saturated in most parts of the site. [SD 3.1.4] Contaminants of concern in groundwater.

There is also potential for impacted groundwater to migrate laterally off site; [SD 3.3.1. iv]

is considered that the loading of the landfill will not result in the generation

of ground gas or the creation of a new pathway. [SD 5.4]

The soil barrier will offer a design life of 75 years. [SD 6.5.5.12]

The permeable reactive sections would require a four-metre standoff and will be

installed to have a 50 year design life [SD 6.5.5.16]

Due to the odorous nature of groundwater beneath the site and the likely presence of some degree of residual contamination following remediation [SD 6.6.1]

The variable nature of landfill material and the extensive area of the site indicated

that local contamination can easily be missed during investigative works without adequate coverage. [SD 4.1.3]