Four former employees at a San Mateo County landfill pleaded not guilty this morning to charges of grand theft of more than $1 million as well as computer fraud, according to prosecutors.
Thirty-one year old Tracy resident Jose Oliver Lopez, 26-year-old East Palo Alto resident Isaac Avelino Molina-Lopez, Rui M. Navalhas and Orlando Duarte Pires, both 44-year-old residents of Half Moon Bay, worked in the "weigh house" at the Ox Mountain Landfill, just east of Half Moon Bay. Their work involved weighing loads, classifying the waste-materials being disposed of and collecting fees from landfill customers, according to prosecutors.