22 It seems to me that it is irrelevant that the damage to the woodchips constituted by the presence of the rubber pieces might be characterised as "contamination". The question to be determined is not how the damage to the woodchips might be characterised but whether the damage to the woodchips was occasioned by or happened through, that is, was caused by, "contamination". Contrary to the submission on behalf of the insured, it is not necessarily illogical to conclude that the damage to the woodchips was caused by contamination if the damage can itself be characterised as contamination. In ordinary usage, contamination may be a condition or it may be a process. The fact that the condition of the piles of damaged woodchips, or the damage itself, can be described as "contamination" does not preclude a conclusion that the process by which the woodchips were damaged was one of "contamination" in the sense of the introduction or entry of the rubber pieces into the woodchips.
23 The question is whether the agreed facts fall within the Exclusion as properly understood. In my opinion the Judge was correct when he found that that is what the arbitrator decided, namely, that the damage to the woodchips was caused by contamination (by the admixture of rubber flakes and scallops with the woodchips).
24 Although, when looking at the perils listed in exclusion 3(a)(ii), one cannot identify a single genus, most of the perils listed relate to disturbances of the integrity of the insured property. In my opinion the Exclusion is concerned with events or perils affecting the insured property of the types described (contamination, pollution, mildew, mould etc) that originate within the premises of the insured and against which the insured would or ought to have the ability to take precautions by appropriate protective measures. Given that for the Exclusion to apply the specified event or peril must not result from a cause originating beyond the premises of the insured, it is highly probable that each of the specified events or perils will have resulted from causes or a chain or combination of causes originating within those premises. It would always be possible by examining antecedent events to identify such an anterior cause or combination of causes. In the present case the agreed facts show that the rubber pieces came from the conveyer belt, that the conveyor was "defective" in a number of ways which had led to the damage to the conveyor belt, and that the "defects" in the conveyor had arisen as a result of inadequate inspection and maintenance practices. No doubt the causal chain could have been traced back even further by reference to policies that may or may not have been put in place by the insured's management in relation to such inspection and maintenance practices, and so on.
25 Mercantile Mutual Insurance (Aust) Ltd v Rowprint Services (Victoria) Pty Ltd[14] was a case involving an industrial special risks policy of insurance covering physical damage. The relevant exclusion clause considered in that case related to damage to machinery "occasioned by or happening through any mechanical ... malfunction". The facts were that the damage to the machinery in question (cylinders of a printing press) was caused by the acts of an employee who had failed sufficiently to correctly tighten the bolts which formed part of the press. Ormiston JA held that that was not a "mechanical" malfunction within the meaning of the exclusion because of the human agency responsible for the malfunction, so that considerations of questions of causation were unnecessary.[15] Phillips JA considered that causation was not really the problem before the Court because the case depended upon the proper construction of the exclusion clause which was concerned with malfunctions "due to the innate condition of the machine".[16] Callaway JA treated the problem as one of construction but also as involving, within that context, the identification of the proximate cause of the damage as employee negligence.[17]
26 In the present case, I cannot see why the damage to the woodchips cannot be properly considered as having been caused by contamination. This conclusion it seems to me accords both with common sense and with commercial good sense. There is no reason in the context of the Exclusion, and the Policy as a whole, to search the antecedent events in order to identify anterior causes. There is no good reason to think that the Exclusion was not intended to cover what in the present case can reasonably be characterised as damage caused by contamination. At any rate, I am unable to conclude that the arbitrator was manifestly in error in so deciding, as in my opinion he did. I would be reluctant to consider that it is even arguable that there is an error of law on the face of the award but, certainly, it is neither obvious nor evident. There are no powerful reasons for considering on a preliminary basis that there is any such error, after having heard adversarial argument that, although not prolonged, was comprehensive.
27 In my opinion, for those reasons and for the reasons given by the learned primary Judge, there is no manifest error of law on the face of the award nor is there strong "evidence" that the arbitrator had made any error of law. I would therefore dismiss the application for leave to appeal from the judgment below.