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

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Thermoplastic well casing that may be subject to significant impact stressduring or after installation shall meet or exceed the requirements for impactresistance classification set forth in Section 6.5 of ASTM F480. Casing thatmay be subject to significant impact forces includes, but is not limited to;casing that is installed in large diameter, deep boreholes; and casing throughwhich drilling tools pass following installation of the casing in a borehole.b. Thermoset Plastics. Thermoset casing material shall meet the followingspecifications, as applicable, including the latest revisions thereof:(1) Filament Wound Resin PiQe. ASTM D2996, Standard Specificationfor Filament Wound Reinforced Thennosetting Resin Pipe.(2) Centrifugally Cast Resin PiQe. ASTM D2997, Standard Specificationfor Centrifugally Cast Reinforced Thennosetting Resin Pipe.(3) Reinforced Plastic Mortar Pressure Pipe. ASTM D3517, StandardSpecification for Reinforced Plastic Mortar Pressure Pipe.(4) Glass Fiber Reinforced Resin Pressure Pipe. AWWAl C950,AWWAStandard for Glass-Fiber-Reinforced Thennosetting-Resin Pressure Pipe.c.d.DrinkiQI! Water Su~~ly. All plastic casing used for drinking water supplywells, including community supply well and individual domestic wells, shallmeet the provisions of National Sanitation Foundation Standard No. 14,Plastic Piping Components and Related Materials and any revision thereof. Thecasing shall be marked or labeled following requirements in NSF StandardNo. 14. Standard No. 14 includes the requirements of ASTM F480.Storage. Handlin!!. and TransRortation. Plastic casing shall not be stored indirect sunlight or subjected to freezing temperatures for extended periods oftime. Plastic casing shall be stored, handled, and transported in a manner thatprevents excessive mechanical stress. Casing shall be protected from saggingand bending, severe impacts and loads, and potentially harmful chemicals.Large Diameter Wells. Because large diameter plastic casing has not beenused extensively at depths exceeding 500 feet, special care shall be exercisedwith its use in deep wells.6.Unacce~table Casing Materials. Galvanized sheet metal pipe such as 'downspout,' tilepipe, or natural wood shall not be used as well casing.Other Materials. Materials in addition to those described above may be used as wellcasing, subjecto enforcing agency approval."Subsection B (page 45 of Bulletin 74-81) has been revised as follows:"B.Casing Installation. All well casing shall be assembled and installed with sufficient care toprevent damage to casing sections and joints. All casing joints above intervals of perforations. e. 5.1 American Water Works Association.-25-
or screen shall be watertight. Any perforations shall be below the depths specified inSection 9, Subsection A, page 14, above.Casing shall be equipped with centering guides or 'centralizers' to ensure the even radialthickness of the annular seal and filter pack.Metallic Casin\!. Metallic casing may be joined by welds, threads, or threadedcouplings. Welding shall be accomplished in accordance with the standards of theAmerican Welding Society or the most recent revision of the American Society ofMechanical Engineers Boiler Construction Code. Metallic casing shall be equippedwith a 'drive shoe' at the lower end if it is driven into place.Plastic Casin\!. Plastic casing may be joined by solvent welding or mechanically joinedby threads or other means, depending on the type of material and its fabrication.Solvent cement used for solvent welding shall meet specifications for the type of plasticcasing used. Solvent cement shall be applied in accordance with solvent and casingmanufacturer instructions. Particular attention shall be given to instructions pertainingto required setting time for joints to develop strength.The following specifications for solvent cements and joints for PVC casing shall bemet, including the latest revisions thereof:a. ASTM D2564, Standard Specification for Solvent Cements for Poly (VinylChloride) (PVC) Plastic Pipe and Fittings.b. ASTM D2855, Standard Practice for Making Solvent-Cemented Joints with Poly(Vinyl Chloride) (PVC) Pipe and Fiuings.Plastic casing or screen shall not be subjected to excessive stress during installation andshall not be driven into place. Care shall be taken to ensure that plastic casing andjoints are not subjected to excessive heat from cement-based sealing material.A specifically designed adapter shall be used to join plastic casing to metallic casingor screen.". 1.Section 14. Well Development.Section 14 (page 46 of Bulletin 74-81) has been revised as follows:"Development, redevelopment, or reconditioning of a well shall be performed with care, by methods that willnot damage the well structure or destroy natural barriers to the movement of poor quality water, pollutants,and contaminants.well development, redevelopment, or reconditioning methods include:.Overpumping;.Surging or swabbing by use of 'plungers';..Surging with compressed air;.Backwashing or surging by alternately starting and stopping a pUffin: c'.Jetting with water;2. ~Acceptable-26-
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 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 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
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
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California Water Well Standards, DWR Bulletin 74 ... - County of Glenn

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