(a) Except as otherwise provided, the standards for construction and modification of wells shall be those as set forth in the "Water Well Standards: State of California, California Department of Water Resources Bulletin 74," 1968, including all subsequent modifications.
(b) The construction of monitoring wells shall conform to the applicable California Department of Water Resources, California Department of Toxic Substance Control, the Regional Water Quality Control Board, and the United States Environmental Protection Agency standards and guidelines for the construction of monitoring wells.
(c) For the construction or modification of a well that penetrates more than one groundwater aquifer in areas designated by the City with known groundwater quality problems, the Department may require:
(1) A report prepared by a geologist registered pursuant to Business & Professions Code § 7850 or a civil engineer that is licensed pursuant to Business & Professions Code § 6762 that identifies all strata containing poor quality groundwater and recommends the location and specification of the seal(s) needed to prevent the entrance of poor quality groundwater or its migration into the other aquifers, and
(2) Special annular seals to prevent mixing of groundwater from the several aquifers.
(d) Drilling fluids and other drilling materials used in connection with the construction of wells or soil borings shall not be allowed to discharge onto streets or into sanitary sewer or waterways, or to the adjacent property unless:
(1) the San Francisco Public Utilities Commission, Industrial Waste Division gave prior approval to the discharge of drilling fluid into the sanitary sewer;
(2) the discharge is carried out in compliance with a lawful order from the Regional Water Quality Control Board for the San Francisco Bay Area; or
(3) the discharge onto adjacent property is in accordance with a prior written agreement with the owner(s) of the adjacent property; such fluids and materials shall be cleaned up and removed within thirty (30) days after completion of the well drilling; and there is no violation of waste discharge regulations set forth in Article 4.1 of the San Francisco Public Works Code.
(Added by Ord. 113-05, File No. 050547, App. 6/10/2005)