OAR 690-240-0460
Monitoring Well Screen, Filter Pack, and Filter Pack Seal

(1)

The screen and filter pack, when properly designed and installed, allows a water quality sample to be collected that is representative of water in the formation.

(2)

The well screen shall:

(a)

Be commercially fabricated and constructed of material that is not knowingly readily reactive with the subsurface environment;

(b)

Have a collapse strength great enough to withstand the pressures exerted during construction and development of the monitoring well;

(c)

Be in new or like new condition, being free of pits or breaks;

(d)

Be cleaned using methods outlined in OAR 690-240-0450 (Cleaning)(3); and

(e)

Be centered in the borehole.

(3)

The use of lead packers with the screen sections is prohibited.

(4)

A bottom cap or end plug shall be attached to each well casing.

(5)

The filter pack shall:

(a)

Consist of clean, chemically inert, well rounded material;

(b)

Not extend more than three feet above the top or one foot below the bottom of the well screen; and

(c)

Be placed in such a manner as to ensure placement opposite the well screen without bridging or size segregation.

(6)

The filter pack seal shall consist of:

(a)

A two foot thick layer of fine grained sand above the filter pack if a grout or grout slurry is used; and/or

(b)

A minimum of a three foot thick layer of dry bentonite. If a grout slurry is to be used as the annular seal, the bentonite shall be adequately hydrated prior to placement of the annular seal to prevent grout infiltration into the filter pack.

Source: Rule 690-240-0460 — Monitoring Well Screen, Filter Pack, and Filter Pack Seal, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=690-240-0460.

690‑240‑0005
Introduction 690‑240‑0006
Special Standards 690‑240‑0007
Special Area Standards 690‑240‑0010
Definitions 690‑240‑0011
Organic Materials 690‑240‑0012
Public Safety 690‑240‑0013
Wells Cannot Be Used for Disposal of Contaminants 690‑240‑0014
Water Used Must be Potable 690‑240‑0015
Delegation of Responsibility for Monitoring Wells, Geotechnical Holes and Other Holes 690‑240‑0016
Unattended Wells 690‑240‑0020
Delegation Conditions 690‑240‑0024
Well Identification Label 690‑240‑0026
Well Identification Label Maintenance 690‑240‑0030
Other Holes: General Performance and Responsibility Requirements 690‑240‑0035
Geotechnical Holes: General Performance and Responsibility Requirements 690‑240‑0040
Closed Loop Ground Source Heat Pump Boring — General Requirements 690‑240‑0043
Construction Standards 690‑240‑0046
Grouting of Uncased Boring 690‑240‑0049
Reporting Requirements 690‑240‑0055
License Required to Construct Monitoring Wells 690‑240‑0060
Monitoring Well Constructor License Examination 690‑240‑0065
Monitoring Well Constructor License, Experience Requirements and Trainee Card 690‑240‑0070
Terms of Monitoring Well Constructor License and License Fees 690‑240‑0200
Continuing Education Committee 690‑240‑0210
Continuing Education Requirement 690‑240‑0220
Documentation 690‑240‑0240
Approved Course List/Course Approval and Assignment of CECs 690‑240‑0250
Course Sponsor Requirements 690‑240‑0260
Loss of Approval 690‑240‑0270
Courses Taken Without Prior Approval 690‑240‑0280
Waivers 690‑240‑0320
Contracting for Services 690‑240‑0330
Monitoring Well Constructor and Landowner Well Bonds or Letters of Credit 690‑240‑0340
Landowner Well Construction Permit, Fee and Bond 690‑240‑0355
Monitoring Well Drilling Machines 690‑240‑0375
Monitoring Well Construction Notice Required (Start Card) 690‑240‑0385
Start Card Reporting Requirements 690‑240‑0395
Monitoring Well Report Required (Monitoring Well Log) 690‑240‑0410
Monitoring Well Construction: General 690‑240‑0420
Well Protection 690‑240‑0430
Casing 690‑240‑0440
Additional Standards for Artesian Monitoring Wells 690‑240‑0450
Cleaning 690‑240‑0460
Monitoring Well Screen, Filter Pack, and Filter Pack Seal 690‑240‑0475
Well Seals 690‑240‑0485
Monitoring Well Development 690‑240‑0500
Completion of Monitoring Wells 690‑240‑0510
Abandonment of Monitoring Wells 690‑240‑0525
Piezometers 690‑240‑0540
Direct Push Monitoring Wells and Piezometers 690‑240‑0550
Evidence of Failure 690‑240‑0560
Investigation of Alleged Violations 690‑240‑0580
Enforcement Actions 690‑240‑0590
Multiple Violations and Consolidation of Proceedings 690‑240‑0600
Factors Affecting Selection of Type and Degree of Enforcement 690‑240‑0610
Change in Enforcement Status 690‑240‑0630
Assessment of Civil Penalties 690‑240‑0640
Schedule of Civil Penalties
Last Updated

Jun. 8, 2021

Rule 690-240-0460’s source at or​.us