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r Other factors include: TABLE 1 REPORTS ISSUED UNDER 1. Population growth in the hilly and mountainous 1 WATER WELL STANDARDS PROGR� rural areas of California, which has resulted in a heavy demand for individual and community water supplies in those areas. DWR Area of Study Bulletin No. Publication Date2/y 2. The 1976-77 drought, the most severe in a half- century, which caused a heavy demand for new wells, replace- ment wells, and well deepenings. It also produced an Mendocino County 62 November 195$ increased awareness of the significance of the State's ground Supplement 8/7/694/ water resources. Alameda County 74-2 P.E. December 1962 3. The increasing cost of energy for pumping. In F.E. June 1964 4 terms of well construction and operation, this has meant Supplement 10/20/69-1 greater interest in the design of efficient wells and in Del Norte County 74-3 P.E. March 1964 well maintenance (previously, a much neglected activity). F.E. August 1966 These as well as other considerations led to the Central, Hollywood 74-4 October 1965 decision to revise the 1968 edition. and Santa Monica Final Supplement This edition is composed.of this chapter, Basins (Los Angeles August 1968 Chapter II, "Standards", and five appendixes. County) While there have been a number of modifications and San Joaquin County 74-5 March 1965 additions to them, the 23 sections of Chapter II, "Standards", Final Supplement are as listed in the 1968 edition. All references to exist- July. 1969 ing laws, standards, and publications have been updated and, Fresno County 74-6 September 1968 where appropriate, additional explanation is provided. Every ty p effort has been made to clarify wording to ensure its under- standing. A number of figures illustrating the standards Arroyo Grande Basin 74-7 July 1971 have been included. (San Luis Obispo Co.) Mary technical terms concerning ground water and Shasta County 74-8 August 1968 water well construction are frequently misunderstood or Ventura Coup 74-9 August 1968 misinterpreted. The term "seal" or "sealing", for example, County has several meanings in the jargon of the well driller, West Coast Basin 107 August 1962 geologist, and engineer, depending on what part of the well (Los Angeles County) Supplement 8/16/684/ installation is under discussion. In this report, we have tried to ensure that the technical terms used are understand- Coachella Valley Area August 1979 able. (Riverside County) A list of definitions appears in Appendix A. Certain definitions are made a part of the standards and are presented in Chapter II. Appendixes B, C, and D describe 1 Listed by DWR Bulletin Number. sealing methods, disinfection, and water quality sampling Publications issued prior to June 1971 are out-of-print. respectively. Copies may be borrowed or inspected at Department's Numerous publications relating to the construction district offices, county offices administering well of water wells and to the development, use, and protection of ordinances and local libraries. ground waters have been reviewed in preparation of this P.E. - Preliminary Edition; F.E. - Final Edition. report. Included is a considerable body of literature on 1 Following the enactment of Sections 13800 through 13806 of well construction that has been written since 1968. They are the Water Code in 1967 supplemental memoranda reports listed in Appendix E 9n alphabetical order by author. summarizing the material presented in these publications and recommending the establishment of standards in these Establishing and Enforcing Standards areas were issued. ,5/ Unnumbered memorandum report. Authority for establishing and enforcing standards for construction and destruction of water wells has always rested with the 58 counties and 429 cities in California.