A process for biological restoration of ground water in a mineralized sandstone formation using a nutrient source. The process is used in conjunction with mining uranium using in-situ pump and treat technology. The restoration of the ground water is designed to meet federal and state regulations. The process includes pumping the contaminated ground water from the mineralized sandstone formation using production wells to the ground surface. The ground water is then circulated through at least one ion exchange column. The ion exchange column is used to capture any residual uranium remaining in solution. The treated ground water then flows from the ion exchange column through at least one reverse osmosus unit. The reverse osmosus unit is designed to help decrease any remaining dissolved solids in solution, such as sodium and chloride. From the reverse osmosus unit, the ground water is circulated through at least one de-carbonation column. The de-carbonation column is used to remove residual carbon dioxide in the ground water. Upon exiting the de-carbonation column, a nutrient source is introduced into the ground water for stimulating the indigenous bacteria in the mineralized sandstone formation. The ground water is now pumped back into the ground where it is reintroduced into the sandstone formation.