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

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c.STANDARDSPart I.GeneralSection 1. Definitionsl.AB.Monitoring Well. The term "monitoring well" is defined in Section 13712 of the CaliforniaWater Code as:"...any anificial excavation by any method for the purpose of monitoringfluctuations in groundwater levels, quality of underground waters, or theconcentration of contaminants in underground waters."roloration Hole (or Boring). An uncased temporary excavation whose purpose is the immediatedetermination of hydrologic conditions at a site.Enforcing Ageng. An agency designated by duly authorized local, regional, or State governmentto administer and enforce laws or ordinances penaining to the construction, alteration,maintenance, and destruction of monitoring wells.Section 2. Application to Well Type.These standards apply to all types of monitoring wells, except as prescribed in Sections 3,4, and 5, below.Before a change in use of a well is made, any standards for the new use must be complied with.Section 3. Exemptions for Unusual Conditions.Under certain circumstances the enforcing agency may waive compliance with these standards and prescribealternate requirements. These standards may be waived where they are impractical or ineffective because ofunusual conditions or would result in an unsatisfactory condition or well function. In waiving any of thesestandards the enforcing agency shall, if at all possible, require measures be implemented to provide the sameor greater level of water-quality protection that would otherwise be provided by these standards.Section 4. Exclusions.Most standards in Part II, "Monitoring Well Construction," page 41, do not apply to "exploration holes."However, provisions of Section 7, "Reports," below and Part III, "Destruction of Monitoring Wells," page 50,do apply directly to exploration holes.Exploration holes for determining suitability of on-site domestic sewage disposal that are less than 10 feet indepth are exempt from the reporting and destruction requirements of these standards.Large volume excavations for determining the suitability of on-site domestic sewage disposal, such as backhoetrenches, that exceed ten feet in depth are exempt from the requirements of Part III of these standards.However, such excavations shall be backfilled with the excavated material or other suitable fill material andthe backfill compacted in lifts to attain at least 90 percent relative compaction in order to restore physicalconditions in the excavation as much as possible. If a layer or layers of material that serve to impede the
movement of poor-quality water, pollutants and contaminants are penetrated by the excavation, they shall bereestabliShed to the degree possible to provide protection for underground waters, unless otherwise approvedby the enforcing agency. In some cases it may be necessary to backfill all or a portion of the excavation withsealing material meeting these standards to reestablish natural barriers to the movement of poor-quality water,pollutants, and contaminants.Section 5. Special Standards.The enforcing agency may prescribe measures more stringent than standards presented here, where needed toprotect public safety or protect water quality.Section 6. Responsible Parties.Pursuant to Section 13750.5 (Division 7, Chapter 10, Article 3) of the California Water Code; construction,alteration, and destruction of monitoring wells shall be performed by contractors licensed in accordance withthe California Contractors' License Law (Division 3, Chapter 9, California Business and Professions Code),except where exempted by law. Construction, alteration, or destruction of monitoring wells to monitorhazardous waste facilities, other waste facilities, or underground storage tanks, shall be performed under thesupervision of a California Registered Professional Engineer, California Registered Geologist, or CaliforniaCertified Engineering Geologist, where specified by law.Section 7. Reports.Monitoring well construction, alteration, and destruction reports shall be completed on forms provided by theCalifornia Department of Water Resources. Other types of forms may be used for submission to theDepartment with the prior appToval of the Department. The completed forms shall be submitted to theDepartment in accordance with relevant provisions of Sections 13750 through 13754 (Division 7, Chapter 10,Article 3) of the California Water Code. Information concerning completion and submission of wellconstruction, alteration, and destruction reports is contained in Guide to the Preparation of the Water WellDrillers Report, Department of Water Resources, October 1977, or its latest revision... -40-
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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
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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 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
Page 77 and 78: (Division 3, Chapter 9, California
Page 79 and 80: 3. B.E. c.consolidation after place
Page 81 and 82: for surface construction features a
Page 83 and 84: ~Part III.Destruction of Cathodic P
Page 85 and 86: E.these standards, or standards ado
Page 88 and 89: ~APPEN DIX ADefinition of Terms-A m
Page 91: National Association of Corrosion E

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

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