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

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~ viiForewordOrganization.TABLE OF CONTENTS.Egg~iiivDepartment of Water Resources.CalifomiaWaterCommissionvviAcknowledgements.xviGeneral IntroductionHistoryofDWRStandards 3Relationship ofDWRWe11 Standards Publications 4Organization of This Supplement 6Limitations of Standards. 6Applicability ~ 6REVISIONS TO WATER WELL STANDARDS(Refer to page 10 which summarizes portions of Bulletin 74-81 that are deleted by these revisions.)Introduction. 9Standards. 11Part I. General 11Section 1. Definitions 11I. Exploration Hole (or Boring) 11J. TestWells 11L. Enforcing Agency 11Partll. Well Construction 12Section 8. Well Location with Respecto Pollutants and Contaminants,and Structures. 12A Separation 12B. Gradients 13C. Flooding and Drainage. 13D. Accessibility 13
Table Of Contents (Cont'd)e.g~Section 9. Sealing the Upper Annular Space 13A Minimum Depth of Annular Surface Seal 141. Shallow ground water. 142. Encroachment on known or potential sources of pollution or contamination. 143. Areasoffreezing 144. Vaults 14B. Sealing Conditions. 151. Wells drilled in unconsolidated, caving material. 152. Wells drilled in unconsolidated material with significant clay layers. 163. Wells drilled in soft consolidated formations (extensive clays,sandstones,etc.)8. Wells that penetrate zones containing poor-quality water, pollutants,16or contaminants. 17D. Sealing Material. 171. Water 172. Cement 17a. NeatCement 18b. Sand Cement. 18c. Concrete 19d. Mixing 193. Bentonite 19E. Radial Thickness of Seal. 20F. Placement of Seal 201. Obstructions 202. Centralizers 203. Foundation and Transition Seals. 214. Timing and Method of Placement 215. Ground Water Flow 226. Verification 227. Pressure 22Section 10. SurfaceConstmctionFeatures 22A Openings 225. Bases 22B. Well Pits or Vaults 23F. BackflowPrevention 24Section 12. Casing 24A Casing Material. 243. Plastic 24a. Thermoplastics 24(1) ABS Pipe. 24(2) PVC Pipe. 24(3) Pressure-RatedPVCPipeb. Thermoset Plastics.2425(1) Filament Wound Resin Pipe 25(2) CentrifugallyCastResinPipe(3) Reinforced Plastic Mortar Pressure Pipe.2525VIII
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 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 26 and 27: ~STANDARDSPart I. GeneralSection 1.
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
Page 44: ~-29-
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
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c.Casing spacers shall be designed
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~ 1.Section 12. Casing.The term "ca
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B. c. E.Over~um~ing and Pum~ Surgin
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2. b.Section 19. Requirements for D
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3. 5. E.freefall only where the int
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INTRODUCTIONMost wells in Californi
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Many cathodic protection wells have
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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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