OAR 690-210-0210
Plastic Casing

(1)

Plastic casing shall not be driven and may only be installed in an oversized drillhole.

(2)

Plastic casing may only be installed after drilling has been completed. No drilling is allowed inside plastic casing.

(3)

Such casing shall be of polymerized vinyl chloride (PVC), type 1120 or 1220, SDR 21 (Class 200) or SDR 26 (Class 160) or greater wall thickness, meeting the standards of the “National Sanitation Foundation” and the specifications of ASTM F-480 or ASTMD-2241-73 and D-1784-69. The well casing must be clearly marked by the manufacturer showing: nominal size, type plastic material, Standard Dimension Ratio (SDR), ASTM designation, and National Sanitation Foundation seal of certified approval. The maximum depth to which this plastic casing may safely resist collapsing forces is a function of the “Standard Dimension Ratio” (SDR), i.e., the ratio of the outside diameter to the casing wall thickness. The maximum depths have been computed for readily available SDR and are cited as:

(a)

SDR = 21 — Maximum Depth = 150 feet;

(b)

SDR = 26 — Maximum Depth = 100 feet.

(4)

If PVC casing is to be used, it shall be protected from physical and ultraviolet light damage using one of the following methods:

(a)

By use of an upper protective steel casing meeting the requirements of OAR 690-210-0190 (Steel Casing). The protective steel casing shall be a minimum of 2" larger in diameter than the PVC casing and shall overlap the PVC casing. The protective steel casing shall extend at least six inches above the top of the plastic well casing and shall be sealed at least four feet into the ground within the annular seal and shall be fitted with a lid; or

(b)

By use of a wellhead bunker. The bunker shall be made of concrete, hard plastic, fiberglass, wood or other structurally sound material that will protect the casing from both physical damage and ultraviolet light damage. The bunker shall completely surround the well and be fitted with a lid. The bunker shall be constructed so that access to the wellhead is maintained; or

(c)

By other appropriate methods as approved in advance by the Water Resources Department.

(5)

Pitless adaptors or units are not recommended in conjunction with PVC casing. If a pitless adaptor or unit is to be used, the constructor should take care that the weight of the pump and pump column do not exceed the strength of the casing.
[Publications: Publications referenced are available from the agency.]

Source: Rule 690-210-0210 — Plastic Casing, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=690-210-0210.

690‑210‑0005
Standards Apply to all Methods of Well Construction 690‑210‑0030
Placement of Water Supply Wells 690‑210‑0060
Explosives 690‑210‑0065
Hydrofracturing 690‑210‑0070
Injection Wells 690‑210‑0100
Mineralized or Contaminated Groundwater 690‑210‑0130
Sealing of Wells in Unconsolidated Formations Without Significant Clay Beds 690‑210‑0140
Sealing of Water Supply Wells in Unconsolidated Formations with Significant Clay Beds 690‑210‑0150
Sealing of Water Supply Wells in Consolidated Formations 690‑210‑0155
Additional Standards for Artesian Water Supply Wells 690‑210‑0160
Additional Standards for Filter Pack Wells with Surface Casing 690‑210‑0170
Additional Standards for Filter Pack Wells without Surface Casing 690‑210‑0180
Additional Standards for Driven or Jetted Wells 690‑210‑0190
Steel Casing 690‑210‑0200
Steel Casing Joints 690‑210‑0210
Plastic Casing 690‑210‑0220
Plastic Casing Joints 690‑210‑0230
Inner Casing 690‑210‑0240
Casing Shall be Centered 690‑210‑0250
Top Terminal Height 690‑210‑0260
Openings in the Casing 690‑210‑0270
Pitless Well Adapters and Units 690‑210‑0280
Access Ports, Dedicated Measuring Tubes and Airlines 690‑210‑0290
Liner Pipe 690‑210‑0300
Drill Cuttings or Chips 690‑210‑0310
Cement Grout 690‑210‑0315
Concrete 690‑210‑0320
Methods of Placement of Cement Grout or Concrete 690‑210‑0330
Unhydrated Bentonite 690‑210‑0340
Method of Placement of Unhydrated Bentonite 690‑210‑0350
Resumption of Construction Following Placement of Cement Grout 690‑210‑0360
Movement of Casing after Cement Grouting 690‑210‑0370
Well Test 690‑210‑0380
Disinfection of a Well 690‑210‑0390
Completion of Wells 690‑210‑0400
Construction of Dug Wells 690‑210‑0410
Buried Slab Construction 690‑210‑0420
Surface Curbing
Last Updated

Jun. 8, 2021

Rule 690-210-0210’s source at or​.us