Mexico's state-owned oil company, Pemex, announced...that it expects to spend at least $46 million on what it described as the biggest soil-remediation effort in its history at the 55-hectare (136 acre) site of a former oil refinery in Mexico City that had operated here for six decades. The huge task involves...remov[ing] gasoline, diesel and refinery products...that seeped into the ground...The land is to be turned into a park by 2010...the land will be cleaned up enough so that it will represent no risk to citizens using the planned park.