Pro Rata v. All Sums: When Viking Pump Applies

The United States Court of Appeals for the Second Circuit recently changed the tune of a decades-old insurance coverage dispute when it decided to apportion liability exposure for multiple instances of environmental contamination on an “all sums” basis. In the matter of Olin v. OneBeacon, Olin, a manufacturing company, sought indemnity for remediation costs and other sums related to pollution cleanup at five of its manufacturing sites under several excess general liability policies. OneBeacon insured Olin under three excess umbrella
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