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52 THE RURAL VOICE
Agrilaw
Contaminant discharge -
Paul G.
Vogel, a
partner in the
London law
firm of Cohen
Highley LLP.
By Paul Vogel
The discharge of a contaminant
into the natural environment is an
offence under the Environmental
Protection Act. As with most other
environmental offences, this offence is
one of strict liability which requires a
defendant to prove that all reasonable
steps were taken to prevent the
particular event giving rise to the
charge in order to avoid conviction.
Where the precise cause of the
discharge remains unknown, can a
defendant establish the defence of due
diligence?
The Ontario Court of Appeal
recently considered this issue upon an
appeal by a defendant of a conviction
resulting from the discharge of
gasoline into the natural environment
following a pipe failure. Even though
the evidence at trial established the
defendant had safety systems and
procedures in place to prevent pipe
failure and to detect and remediate the
effects of a discharge if it should
occur, the trial judge convicted the
defendant on the basis that the
defendant could not demonstrate
reasonable care where the cause of the
pipe failure remained unknown.
In allowing the appeal and setting
aside the conviction, the Court of
appeal' referred to earlier case
authority determining that the due
diligence defence is available if the
defendant "took all reasonable steps to
avoid the particular event". The Court
stated:
"...`the particular event' which the
accused must show it has taken all
reasonable steps to avoid is the
discharge of the polluting
substance into the particular water
system. There is no suggestion...
that the accused must first prove
the precise cause of the discharge
before it can engage the defence of
what is 'due diligence'?
due diligence."
However, in coming to this
conclusion, the Court emphasized
that, absent evidence with respect to
the cause of the pipe failure, to
establish due diligence the defendant
will be required to demonstrate the
taking of all reasonable care to avoid
any foreseeable cause. The Court
held:
"I do not think that the law requires
the accused to prove precisely how
the discharge came about — in this
case precisely why the pipe failed —
in order to avail itself of the due
diligence defence. On the other
hand, in a case where the accused
can do this, it may be able to
narrow the range of preventative
steps that it must show to establish
that it took all reasonable care.
However where, as here, the
accused cannot prove the precise
cause of the pipe failure the due
diligence defence is not rendered
unavailable as a result. That being
said, it must be emphasized that to
invoke the defence successfully in
such circumstances, the accused
must show that it took all
reasonable care to avoid any
foreseeable cause."
Thus, the defendant's inability to
identify the cause of a discharge will
not necessarily defeat a defence of due
diligence. However, in such a case,
the onus clearly remains upon the
defendant to establish not only
installation of necessary equipment
and implementation of appropriate
procedures but also that these
measures constitute reasonable care to
avoid the discharge regardless of how
it occurred.0
Agrilaw is a syndicated column
produced by the full service London
law firm of Cohen Highley LLP. Paul
G. Vogel, a partner in the firm,
practices in the area of commercial
litigation and environmental law.
Agrilaw is intended to provide
information to farm operators on
topics of interest and importance. The
opinions expressed are not intended as
legal advice. Before acting on any
information contained in this column,
readers should obtain legal advice with
respect to their own particular
circumstances and geographical area.