DWR_4148979

• Rule Name: Water Well Construction Rules ‎(2CCR-402-2)‎
• Document Date: 10/17/2023
• Document Type - Rulemaking: Draft, Proposed and Redlined Rules
• Subject: October 2023 Draft Proposed Rules/Redline
• Date Effective: 1/1/2026
• Year Initiated: 2023

FIGURE 4b
TYPE I
AQUIFER
WELLS PENETRATING MORE THAN ONE CONFINING LAYER
Option 1 Option 2 Option 3
Ground Surface ` •
t foot —� : 1 foot �/r
i ,v
Steel Surface Casing
Always Grout as Required ` :/ .
by Rule 10.5.2.1 Min.Depth 19 ft bgs ,,/ :.
10 ft Grout
/ . Overlap ='
. . 1, -
74/
/ . V
/ . V
/ . v
/ . W
!y
'/
Base of Grout from • Base of Grout from
at Least 39 ft bgs, / , , . at Least 39 ft bgs �' "s
/ / . / .
/ . / . / .
/ . / . / .
/ . / . / •
I
T
w
a/
_ � 28 v
Q aQ
r r r r r r
- -- r v r r r r r r .--.:✓ r r r r r
�
Confining Layer - r r• r r r .--ate --• r r r — */
se9 0/ iy
• `.1 tiv '�
,
Eh. rlying Aquifer ` r
Y + v
3 �, y r r r r r
v
r _y - - rrr
Confining Layer 11- � r r r r — e
•
• r • •— r r _ / _r G_ /
/ . / . / .
Must Grout to Base - Must Grout to Base :
of Confining Layer - of Confining Layer -•
Overlying Production Zone _ Overlying Production Zone : -_- Perforated Casing
Production Zone -
Annular-__ - -- / ; Solid Steel Casing
Space
: tam; Approved Grout
Figure 4b. Schematic diagram for wells that penetrate more than one confining unit and are constructed
into a Type I (confined) aquifer.
Suggest updating figure for instance where surface casing is min 39' + penetrates into bedrock where 10'
grout overlap is not required. Could also add an instance to illustrate Policy 2017-2.