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"Noncommunity water systems" and "State small water systems" J. Test Wells. Wells constructed for the purpose (California Waterworks Standards, Title 22, California of obtaining the information needed to design a well prior to Administrative Code). Such wells are variously referred to its construction. Such wells are not to be confused with as "Municipal Wells", "City Wells" or "Public Water Supply "test holes" or "exploration holes" which are temporary in Wells". nature (i.e., uncased excavations whose purpose is the C. Individual Domestic Well. A water well used to immediate determination of existing geologic and hydrologic supply water for the domestic needs of an individual conditions). Test wells are cased and can be converted to observation or monitoring wells and under certain circum- residence��or systems of four or less service connections (or stances to production wells. hook-ups as they are often called). D. Industrial Wells. Water wells used to supply K. Inactive or Standby Well. A well not routinely industry on an individual basis (in contrast to supplies operating but capable of being made operable with a m;n;mnm provided through community systems). of effort. E. Agricultural Wells. Water wells used to supply L. Enforcing Agency. An agency designated by duly water only for irrigation or other agricultural purposes, authorized local, regional or state government to administer including so-called "stock wells". laws or ordinances pertaining to well construction. For community water supply wells the enforcing agency is the F. Recharge or Infection Wells. Wells constructed State Department of Health Services or the local health department. to introduce water into the ground as a means of replenishing ground water basins, repelling the intrusion of seawater or Section 2. Application to Type of Well. disposing of waste water. Except as prescribed in Sections 3 and 4 (follow- G. Air-conditioning Wells. Wells constructed to ing) these standards shall apply to all types of wells return to the ground water which has been used as a coolant described in Section 1. Before a change of use is made of a in air conditioning processes. Because the water introduced well, compliance shall be made with the requirements for the into these wells is degraded (from the standpoint of new use as specified herein. temperature), such wells have been construed as waste dis- charges and are, therefore, subject to the water quality Section 3. Exemption Due to Unusual Conditions. control laws (Division 7 of the Water Code and Division 5 of the Health and Safety Code). If the enforcing agency finds that compliance with H. Horizontal Wells. Water wells drilled hori- any of the requirements prescribed herein is impractical for a particular location because of unusual conditions or if zontally or at an angle with the horizon (as contrasted with compliance would result in construction of an unsatisfactory the common vertical well). This definition does not apply to well the enforcingagency m waive compliance and prescribe horizontal drains or "wells" constructed to remove subsurface alternative requirements which are "equal to" these tandards water from hillsides, cuts, or fills (such installations are in terms of protection obtained. used to prevent or correct conditions that produce landslides). Section 4. Exclusions. I. Observation and Monitoring Wells. Wells The standards prescribed in Part II, "Construc- constructed for the purpose of observing or monitoring ground tion", do not apply to exploration and test holes. However, water conditions. the provisions of Section 7 "Reports" (following) and Part III, "Well Destruction", do apply to these holes. Included are wells used for the injection of reclaimed l Springs are excluded from these standards.2/ waste water. Injection wells are also used to dispose of unusable waste water into formations containing water of unusable quality (such as highly mineralized waters) or dry, nonproductive formations. These latter wells can An example would be an agricultural well converted to use penetrate usable ground water zones but are not permitted as a community water supply well. to open into usable water (Chapter 7, Division 7, 1 Methods which can be used to protect water supplies furn- ished by springs and infiltration galleries are described Safety Code; and Chapter 1, Division 3, California Public in "Manual of Individual Water Supply Systems", U. S. Resources Code.) "Dry" wells, "drainage" wells, and sewer Environmental Protection Agency, Office of Drinking Water wells also fall into this category. Their existance and (EPA-430/9-74-007). operation is also subject to the aforementioned provisions of the State law.