Two major companies are urging an appellate court to overturn a settlement for cleanup of New Jersey’s Passaic River, one of the nation’s most contaminated Superfund sites, faulting the liability allocation prepared by an EPA contractor -- though they are doing so for opposite reasons. In a July 28 brief, the Occidental Chemical Corporation (OxyChem), the largest contributor to pollution at the Diamond Alkali Superfund site, argues that the settlement, which allows dozens of parties with smaller liability to cash...