Decommissioning concrete C 3 tank poses safety concerns

Zoher Meratla CDS Research Ltd. Whistler, B.C. Gerry Sawchyn Centra Gas (Manitoba) Inc. Winnipeg, Man. These steel tanks at Winnepeg's Wilkes Ave. peak-shaving station were decommissioned without problem; no structural defects were found (Fig. 1). This concrete tank is the first in LPG service to be decommissioned (Fig. 2).[29,551 bytes] The recent, first-ever decommissioning of a concrete storage tank in LPG service indicates the need for greater safety precautions for tanks that lack a vapor barrier in contact with the stored product. Such precautions are particularly necessary if tank entry is contemplated without a...

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