From page 41

wall surfaces are exposed to contini-
ous rain or from leaking or condensa-
tion on plumbing pipes Extensive
wood rot can cause significant struc-
tural failure.

Mi Vermin attack. Infestation of wood
weevils, carpenter unts, termites. can
be found in homes that have had or
are having water problems.

Often these problems are hidden
behind finished walls. Some cats,
mice and bats carry Hantivirus. Live
bats found in attics can have rabies.
@ Radon is a colorless, odorless,
radioactive gas that seeps into houses
‘ from the soil and rock beneath and
from groundwater. It is formed by the
decay of uranium and is found in
areas of predominantly granite rock.
It has been linked to various cancers.
@ Piumbing pipes and contaminated
drinking water. Many older houses
sll have lead pipes and leaded solder
connections. Lead from the pipes can
leach into drinking water where it isa
serious health risk.

Some plastic pipes may be made.
of polyvinyl chlorides (PVCs) which -

contain. a vinyl‘ chloride: monomer
known to cause cancer. Old leaking
sewage waste lines and contaminated
well water can contain deadly bacte-
ria The most prevalent water contam-
inants are pesticides, lead, mercury,
aluminum, nitrates, polycyclic aro-
matic hydrocarbons (PAHs), solvents
and trihalomethanes. ;

@ Molds and bacteria found in hous-
es’ that. are tco‘ humid. Musty-

; smelling spores drift through indoor’.

‘air,and trigger allergic reactions and
“contribute to respiratory problems.
4 Combustion ' by-products. Carbon

monoxide and nitrogen dioxide may

be emitted from unvented, poorly
vented or malfunctioning natural gas
furnaces, water heaters, stoves and/or
deteriorated chimneys.

A backdrafling fireplace chimney

can emit carbon monoxide, nitrogen
dioxide, sulphur dioxide and other
airborne pollutants into the house.
@ Dust and pollens are found in air
filters, heating and air conditioning
ducts, improperly maintained air con-
ditioners, atr recovery ventilators,
dehumidifiers can cause allergies and
numerous health problems.

Dust mites and their feces in rugs

and fabrics are also a problem.
& Contaminated soils and ground
water can cause ilfness, Homes that
rest on soils and ground water satu-
rated with contaminants from gases
in buried fill/debris and waste, under-
ground fuel tanks, old leaking
cesspools and septic tanks may
become contaminated.

Soils can also become contami-
nated with lead and asbestos if a gar-
den is planted. Contaminants like
lead can be taken up by plants and. if

the gardener i is unaware of the conla- -

mination, may be eaten.
& Arsenic compounds., These are

highly toxic compounds like «pen-

tachlorophenol (PCP) used as pesti-
cides and fungicides to treat wood.

Arsenic compounds can cause
various cancers. Often the treated
wood is used in the structural compo-
nents of a house or in landscaping
retaining walls. oa

Earthquake; : fire, flodd, hurri-.
canes, mud slides ‘and lightning are
Aatural occurrences,

., Often before starting your renova-

tion precautionary measures must be
taken. on the existing Structure to
ensure safely. yp

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