Re. the possibility of using creosote on decking, a notice at
http://www.birdbrand.co.uk/acatalog/Traditional_Creosote.html
says:
"From 30th June 2003 only 'Professional Users' can purchase & use 25 and
200 Litre sizes. This includes agricultural (farmers, small holders),
forestry and industrials. It is up to the professional person to conduct
a COSHH asessment & ensure that:
It should not be used in areas where is a risk of frequent skin contact
(e.g. *Garden furniture) -EC actual text*.
In parks or gardens.
It should not be used on any containers or pots that come into contact
with food stuffs.
Not for use on children s play equipment."
And Wikipedia has a collection of information on the health aspects of
Creosote use at
http://en.wikipedia.org/wiki/Creosote
"According to the Agency for Toxic Substances and Disease Registry
(ATSDR), eating food or drinking water contaminated with high levels of
coal tar creosote may cause a burning in the mouth and throat, and
stomach pains. ATSDR also states that brief direct contact with large
amounts of coal tar creosote may result in a rash or severe irritation
of the skin, chemical burns of the surfaces of the eyes, convulsions and
mental confusion, kidney or liver problems, unconsciousness, and even
death. Longer direct skin contact with low levels of creosote mixtures
or their vapors can result in increased light sensitivity, damage to the
cornea, and skin damage. Longer exposure to creosote vapors can cause
irritation of the respiratory tract.
The International Agency for Research on Cancer (IARC) has determined
that coal tar creosote is probably carcinogenic to humans, based on
adequate animal evidence and limited human evidence. It is instructive
to note that the animal testing relied upon by IARC involved the
continuous application of creosote to the shaved skin of rodents. After
weeks of creosote application, the animals developed cancerous skin
lesions and in one test, lesions of the lung. The United States
Environmental Protection Agency has stated that coal tar creosote is a
probable human carcinogen based on both human and animal studies.[71] As
such, the Federal Occupational Safety and Health Administration (OSHA)
has set a permissible exposure limit of 0.2 milligrams of coal tar
creosote per cubic meter of air (0.2 mg/m3) in the workplace during an
8-hour day, and the Environmental Protection Agency (EPA) requires that
spills or accidental releases into the environment of one pound (0.454
kg) or more of creosote be reported to them.[72]
There is no unique exposure pathway of children to creosote. Children
exposed to creosote will probably experience the same health effects
seen in adults exposed to creosote. It is unknown whether children
differ from adults in their susceptibility to health effects from
creosote.
A 2005 mortality study of creosote workers found no evidence supporting
an increased risk of cancer death, as a result of exposure to creosote.
Based on the findings of the largest mortality study to date of workers
employed in creosote wood treating plants, there is no evidence that
employment at creosote wood-treating plants or exposure to
creosote-based preservatives was associated with any significant
mortality increase from either site-specific cancers or non-malignant
diseases. The study consisted of 2,179 employees at eleven plants in the
United States where wood was treated with creosote preservatives. Some
workers began work in the 1940s to 1950s. The observation period of the
study covered 1979- 2001. The average length of employment was 12.5
years. One third of the study subjects were employed for over 15
years.[73]
The largest health effect of creosote is deaths caused by residential
fires.[74]"
Hmmm. Not worth the risks, methinks.