HomeMy WebLinkAboutDDW-2024-008323154 EAST 14075 SOUTH • DRAPER, UTAH 84020
TEL: (801) 495-2224 • FAX: (801) 495-2225
June 4, 2024
Mr. Hunter Payne
Utah Division of Drinking Water
195 North 1950 West
Salt Lake City, Utah 84116
(385)278-9837
Subject: Exception Request
South Weber Well #2 Reconstruction
Plan Review File No.: 13638
Dear Mr. Payne:
A recent review of the above referenced project noted that hypochlorite dosing pumps are sized to
yield a concentration of 0.7 mg/L chlorine in the discharge stream of this well. On behalf of the Weber
Basin Water Conservancy District (the District), we request an exception to rule R309-520-7(1)(c)(i)
which states “the capacity of the chlorine feed equipment shall be sized to provide at least 2 mg/L
during peak demand”. Given the target chlorine residual of 0.5 mg/L, the project team cannot foresee
a scenario in which water operators would elect to dose at the specified rate.
The system does meet the other requirements of rule R309-520-7(1)(c): “the feed equipment shall
operate accurately over the design feeding range”; and, “the feed equipment shall be designed to
maintain a detectable residual at all times, at all points within the intended area in the distribution
system”. The District operates several sampling and dosing locations throughout their distribution
network. The dosing pumps will be programmed to operate proportional to the well’s discharge as
measured by the magnetic flow meter.
Sincerely,
Bowen Collins & Associates, Inc.
Michael McFadden, P.E.
Project Engineer
CC: Jesse Moreno, Weber Basin Water Conservancy District