Pollution in Ecuador by a company that Chevron later bought "may be tarnishing (the company's) hard-earned reputation"...said state Controller Steve Westly...ChevronTexaco says all pollution was cleaned up by a $40 million "remediation" completed in 1998...But critics of ChevronTexaco continue to gain support. [also refers to Texaco (now part of ChevronTexaco), Unocal]