California Well Standards, Combined

This online publication is an informal compilation of Bulletin 74-81 and the draft supplemental, Bulletin 74-90. Although Bulletin 74-90 was not finalized by DWR, nor officially adopted into the Model Well Ordinance by the State Water Resources Control Board, it has been adopted into local ordinances around the state. To facilitate its use, DWR has combined the contents according to Table 1 (B74-90) of Bulletin 74-90 and made minor modifications in wording and formatting to improve readability, listed in the Modification List below.

"Part" used in Bulletin 74-81 is equivalent to "Subsection" in Bulletin 74-90; Subsection is used in this web version of the Well Standards.
"Chapter" as used in Bulletin 74-81 is not used in this web version.
References to specific page numbers in the bulletins have been deleted.
Typos found in the bulletins have been corrected.
Equivalent metric units found in Bulletin 74-81 have been deleted.
Footnotes have been moved into the body of the text or listed as "Notes" at the end of each section or table.
Minor rewording has been made.
The front matter found in the bulletins has been deleted.
The two-word spelling of "ground water" found in the bulletins has been changed to one word, which is the current Department style.

Bulletin 74-81 Introduction

Statement of the Problem
The 1981 Edition
Establishing and Enforcing Standards
Design and Performance Guidelines
Testing for Capacity
Well Efficiency
Sanding
Water Well Drillers' Reports
Comments and Public Hearings on Draft Edition

Bulletin 74-90 Introduction

History of DWR Standards
Relationship of DWR Well Standards Publications
Organization of This Supplement
Limitations of Standards
Applicability

Water Well Standards (Bulletins 74-81 & 74-90 combined)

Part I. General, Water Well Standards

Section 1. Definitions
Section 2. Application to Type of Well
Section 3. Exemption Due to Unusual Conditions
Section 4. Exclusions
Section 5. Special Standards
Section 6. Well Drillers
Section 7. Reports

Part II. Water Well Construction

Section 8. Well Location with Respect to Contaminants and Pollutants
Section 9. Sealing the Upper Annular Space
Section 10. Surface Construction Features
Section 11. Disinfection and Other Sanitary Requirements
Section 12. Casing
Section 13. Sealing-Off Strata
Section 14. Well Development
Section 15. Water Quality Sampling
Section 16. Special Provisions for Large Diameter Shallow Wells
Section 17. Special Provisions for Driven Wells
Section 18. Rehabilitation, Repair, and Deepening of Wells
Section 19. Temporary Cover

Part III. Destruction of Water Wells

Section 20. Purpose of Destruction
Section 21. Definition of "Abandoned" Well
Section 22. General Requirement
Section 23. Requirements for Destroying Wells

Monitoring Well Standards (Bulletin 74-90)

Introduction

History of Monitoring Wells
Types of Monitoring Wells
Authority and Responsibilities of Other Agencies
Scope, Organization, and Limitations of Standards

Part I. General, Monitoring Well Standards

Section 1. Definitions
Section 2. Application to Type of Well
Section 3. Exemption Due to Unusual Conditions
Section 4. Exclusions
Section 5. Special Standards
Section 6. Responsible Parties
Section 7. Reports

Part II. Monitoring Well Construction

Section 8. Well Location with Respect to Contaminants and Pollutants
Section 9. Sealing the Upper Annular Space
Section 10. Surface Construction Features
Section 11. Filter Packs
Section 12. Casing
Section 13. Well Development
Section 14. Rehabilitation and Repair of Monitoring Wells
Section 15. Temporary Cover

Part III. Destruction of Monitoring Wells

Section 16. Purpose of Destruction
Section 17. Definition of "Abandoned" Monitoring Well
Section 18. General Requirement
Section 19. Requirements for Destroying Monitoring Wells and Exploration Holes

Cathodic Protection Well Standards (Bulletin 74-90)

Introduction

Electrolytic Corrosion
Cathodic Protection
Cathodic Protection Wells
Corrosion Coordinating Committees
Need of Cathodic Protection Well Standards
History of Cathodic Protection Well Standards
Scope of Standards
Organization of Standards

Part I. General, Cathodic Protection Well Standards

Section 1. Definitions
Section 2. Exemption Due to Unusual Conditions
Section 3. Special Standards
Section 4. Responsible Parties
Section 5. Reports

Part II. Cathodic Protection Well Construction

Section 6. Well Location with Respect to Contaminants and Pollutants
Section 7. Sealing the Upper Annular Space
Section 8. Surface Construction Features
Section 9. Casing
Section 10. Sealing-Off Strata
Section 11. Repair of Cathodic Protection Wells
Section 12. Temporary Cover

Part III. Destruction of Cathodic Protection Wells

Section 13. Purpose of Destruction
Section 14. Definition of "Abandoned" Cathodic Protection Well
Section 15. General Requirement
Section 16. Requirements for Destroying Cathodic Protection Wells

Appendices

Appendix A Definition of Terms
Appendix B Suggested Methods for Sealing the Annular Space and for Sealing-Off Strata
Appendix B (Bulletin 74-90) References
Appendix C Suggested Procedures for Disinfecting Wells
Appendix D Collection of Water Quality Samples
Appendix E Bibliography

Tables

Note about Table numbering: Bulletin 74-90 Tables are denoted with (B74-90).

Table 1. Reports Issued Under Water Well Standards Program
Table 2. County Ordinances in California Concerning the Construction and Destruction of Wells
Table 3. County Ordinances in California with Limited Application to Wells
Table 4. Volume of Water Pumped Continuously from Small Capacity Wells
Table 5. Organizations Submitting Written Comments on Draft of Bulletin 74-81
Table 1 (B74-90). Deletions in Bulletin 74-81
Table 6. Chlorine Compound Required to Dose 100 feet (30 metres) of Water-Filled Casing at 50 Milligrams per Litre

Figures

Note about Figure numbering: Bulletin 74-90 Figures are denoted with (B74-90).

Figure 1. Avenues of Entrance for Pollutants to Wells
Figure 2. Interchange of Water Between Formations via Wells
Figure 1 (B74-90). Years DWR Well Standards Bulletin in Effect
Figure 3. Effect of Reversal of Groundwater Gradient
Figure 4. Sealing Conditions for Upper Annular Space – Unconsolidated and Soft, Consolidated Formations
Figure 5. Sealing Conditions for Upper Annular Space – Hard Rock Formations and Gravel Packed Wells
Figure 6 Typical Surface Construction Features
Figure 7 Surface Construction Features, Community Water Supply Well
Figure 8 Sealing-Off Strata
Figure 9 Properly Destroyed Wells
Figure 2 (B74-90). Monitoring Well Types
Figure 3 (B74-90). Cross Sections of a Typical Monitoring Well
Figure 4 (B74-90). Electrolytic Corrosion of a Buried Pipeline
Figure 5 (B74-90). Cathodic Protection of a Buried Pipeline
Figure 6 (B74-90). Cross Section of a Typical Cathodic Protection Well
Figure 10. Methods for Sealing the Annular Space
Figure 11. Methods for Sealing-Off Strata

California Well Standards, Combined

Modification List

Table of Contents

Bulletin 74-81 Introduction

Bulletin 74-90 Introduction

Water Well Standards (Bulletins 74-81 & 74-90 combined)

Part I. General, Water Well Standards

Part II. Water Well Construction

Part III. Destruction of Water Wells

Monitoring Well Standards (Bulletin 74-90)

Introduction

Part I. General, Monitoring Well Standards

Part II. Monitoring Well Construction

Part III. Destruction of Monitoring Wells

Cathodic Protection Well Standards (Bulletin 74-90)

Introduction

Part I. General, Cathodic Protection Well Standards

Part II. Cathodic Protection Well Construction

Part III. Destruction of Cathodic Protection Wells

Appendices

Tables

Figures

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