UNDERGROUND STORAGE AND SUBSURFACE INJECTION Geostock Sandia is an engineering & geological consulting firm specializing in underground storage and subsurface injection/disposal. - Salt Caverns, Mined Caverns, Depleted Field/Aquifer Storage - Injection wells, industrial waste and brine disposal wells, CO2 EOR and Sequestration wells, gas storage wells - Natural Gas, Crude, Chemicals, and Gas Liquids (NGL, LNG, LPG, CNG) Storage - Regulatory Permitting, Advocacy, Expert Witness, No Migration Petitions - Due Diligence and Acquisition Technical Support - Project Management, Site Supervision - Engineering and Field Well Drilling/Workover