Erin Brockovich's law firm filed a second lawsuit against Beverly Hills, its school district and several oil and gas companies on behalf of hundreds of residents who say they became ill from toxic fumes from a campus oil derrick...The first suit...named 25 oil and gas companies, including Chevron-Texaco Corp. and the derrick's current operator, Venoco Inc. City officials have disputed the allegations, saying that the cancers...are not caused by petroleum or petroleum products.