California Water Well Standards, DWR Bulletin 74 ... - County of Glenn

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~STANDARDSPart I. GeneralSection 1. Definitions.Definitions A through H, and K (page 23 of Bulletin 74-81) are unchanged. The definition for observationand monitoring wells under Definition I has been deleted and replaced with a definition for "exploration hole."Observation or monitoring wells are now addressed in monitoring well standards in this supplement.The new definition under Definition 1 is:"I.Exploration Hole (or Boring). An uncased, temporary excavation whose purpose is thedetermination of hydrologic conditions at a site."Definitions J and L have been revised to read as follows:"J.Test Wells. Wells constructed to obtain information needed for design of other wells. Testwells should not be confused with "exploration holes", which are temporary. Test wells arecased and can be converted to other uses such as ground water monitoring and, under certaincircumstances, to production wells.L. Enforcinl! Al!en~. An agency designated by duly authorized local, regional, or Stategovernment to administer and enforce laws or ordinances pertaining to the construction,alteration, maintenance, and destruction of water wells. The California State Department ofHealth Services or the local health agency is the enforcing agency for community water supplywells."Sections 2 through 7 (page 25 of Bulletin 74-81) are unchanged.-11-
Part II. Well ConstructionSection 8. Well Location With Respect to Pollutants and Contaminants, and Structures.Note: The title of Section 8 has been revised.Section 8 (page 26 of Bulletin 74-81) has been revised to read as follows:"A Se1!aration. All water wells shall be located an adequate horizontal distance from known orpotential sources of pollution and contamination. Such sources include, but are not limitedto:.sanitary, industrial, and storm sewers;.septictanks and leachfields;.sewage and industrial waste ponds;.barnyard and stable areas;.feedlots;.solidwaste disposal sites;.above and below ground tanks and pipelines for storage and conveyance of petroleumproducts or other chemicals; and,.storage and preparation areas for pesticides, fertilizers, and other chemicals.Consideration should also be given to adequate separation from sites or areas with known orsuspected soil or water pollution or contamination.The following horizontal separation distances are generally considered adequate where asignificant layer of unsaturated, unconsolidated sediment less permeable than sand isencountered between ground surface and ground water. These distances are based on presentknowledge and past experience. Local conditions may require greater separation distances toensure ground water quality protection.
Page 1 and 2: --1#~Water wells .1Cathodic protect
Page 4 and 5: . ~~Bulletin 74-81)N. KennedyResour
Page 6 and 7: ~vState of CaliforniaPETE WILSON, G
Page 8 and 9: ~ viiForewordOrganization.TABLE OF
Page 10 and 11: ~ ix(4) Glass Fiber Reinforced Resi
Page 12 and 13: E~B. Sealing Conditions. 421. Tempo
Page 14 and 15: ~CATHODIC PROTECTION WELL STANDARDS
Page 16 and 17: 5.~Introduction:Figure 1.Years DWR
Page 19 and 20: GENERAL INTRODUCTIONImproperly cons
Page 21 and 22: Figure 1. YEARS DWR WELL STANDARDSB
Page 24 and 25: .9-REVISIONS TO WATER WELL STANDARD
Page 28: ~B. c.-13-Many variables are involv
Page 32 and 33: "8. 2.casing and the borehole wall
Page 34 and 35: d. ~c.water shall be used if less s
Page 36 and 37: 3. Foundation and Transition Seals.
Page 38 and 39: -23-otherwise approved by the enfor
Page 40 and 41: Thermoplastic well casing that may
Page 42 and 43: ~.Introducing.Combinationsspecifica
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Page 47: Advances in analytical and environm
Page 50 and 51: Nested monitoring wells consist of
Page 52 and 53: c.STANDARDSPart I.GeneralSection 1.
Page 54 and 55: 1.Part II.Monitoring Well Construct
Page 56 and 57: 1. 3.casing shall in turn be at lea
Page 58 and 59: c.Casing spacers shall be designed
Page 60 and 61: ~ 1.Section 12. Casing.The term "ca
Page 62 and 63: B. c. E.Over~um~ing and Pum~ Surgin
Page 64 and 65: 2. b.Section 19. Requirements for D
Page 66 and 67: 3. 5. E.freefall only where the int
Page 69 and 70: INTRODUCTIONMost wells in Californi
Page 72: Many cathodic protection wells have
Page 75 and 76: Need for Cathodic Protection Well S
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(Division 3, Chapter 9, California
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3. B.E. c.consolidation after place
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for surface construction features a
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~Part III.Destruction of Cathodic P
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E.these standards, or standards ado
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~APPEN DIX ADefinition of Terms-A m
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National Association of Corrosion E
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California Water Well Standards, DWR Bulletin 74 ... - County of Glenn

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