Two Ecuadoreans said Tuesday they plan to confront Chevron Corp.'s CEO during its shareholders meeting this week over allegations that an Amazon rain forest has been contaminated by waste disposal from oil drilling operations. The pair are part of a class-action lawsuit against Chevron in an attempt to force a cleanup of toxic dumping in an area 30 times bigger than the Exxon Valdez oil spill. They said drinking contaminated water has caused cancer and other health problems in the jungle the size of Rhode Island... Chevron has said the plaintiffs' attorneys have not presented any credible, substantiated scientific evidence to support their allegations. [also refers to Texaco (part of Chevron)]