...[D. Pereira, Salvadoran activist:] "Toxic waste water from the [Goldcorp's Cerro Blanco] mine will be discharged into the Ostúa river in Guatemala, and will flow into...Lake Güija, and on into the Lempa river, the main river basin in El Salvador"...a study by Dina Larios, professor of geochemistry and hydrogeology at Ohio University...contains serious warnings about waste water from the mine...Dumping water with high concentrations of fluorine, arsenic and boron in the Ostúa river at a temperature of 35 degrees would endanger its biodiversity and cause thermal pollution, affecting fishing which is the livelihood of hundreds of families in the area...