California Code, Public Resources Code - PRC § 3716

The district deputy in each district shall collect all information regarding the wells in the district necessary for the proper supervision of the wells.  The district deputy shall prepare maps and other accessories necessary to determine the underground conditions in a geothermal area and the location and extent of strata bearing water suitable for irrigation or domestic purposes or surface water suitable for those purposes.  This work shall be done with the view to advising the operators as to the best means of protecting the geothermal resource deposits and the water-bearing strata and surface water, and with a view to aiding the supervisor in ordering tests or repair work at wells.  All the data shall be kept on file in the office of the district deputy of the respective district, and copies thereof shall be available, upon request, to the Director of Water Resources, the State Geologist, and the appropriate California regional water quality control board located in the area involved, subject to Section 3752.