DDW-2024-014400

95 W GOLF COURSE RD, SUITE 101 • LOGAN UT 84321 435.713.0099 OFFICE 435.713.0055 FAX • [e-mail]
12 December 2024
RE: Green Canyon Well #5 - Response to Comments Dear Dani Zebelean,
Cache Landmark Engineering has provided responses for the following comments regarding Green Canyon Well #5: 1. What was the stabilized drawdown for the well? The report and data did not seem to conclude that the 1950 gpm constant rate test resulted in stabilized drawdown. Is the
equipped rate considered where it would be stable? The excerpt from the report had the next step down in flow rate at 1600 gpm, where a 1750 gpm pump is being installed. a. Response: The stabilized drawdown for the well occurs at 1600 gpm. The 1750 gpm pump that to be installed will allow the city to pump additional flow for short periods at peak times. A VFD will be installed to allow for different pumping
rates. 2. Since North Logan is above a population of 3300 people they will need to have a continuous analyzer installed to monitor the point of entry (POE) residual. Since the chlorine injection is last on the discharge piping where is the POE going to be located? By rule the POE needs to be before the first connection. a. Response: The point of entry is located at in the existing water storage tank. The water is pumped to the tank. The city has a continuous analyzer at the tank.
3. Sheet A1.0 called out Detail A for the chlorine vent outside on Sheet M3.0 but the detail does not exist on that page. Is it somewhere else? a. Response: Sheet M3.0 has been updated to reflect the chlorine vent line properly.
Sheet A1.0 has been edited to no longer reference detail A, which does not exist. The chlorine vent line is displayed on sheet M-3.0 and the continuation of the line is shown on C-1.0.
4. Please also confirm the chlorine vent line has a #14 screen. a. Response: The chlorine vent line has a #14 screen. Sheet M-3.0 and C-1.0 have
been updated to clarify that a screen is to be included. The updated construction sheets are included with this document.
5. What is the design chlorine dose rate for the gas chlorinator? a. Response: The design chlorine dose rate has yet to be determined. The water will be pumped to the existing storage tank, where the chlorine levels are monitored
with a continuous analyzer. The chlorine dose rate will be adjusted to provide adequate water treatment depending on the chlorine levels measured in the tank.

95 W GOLF COURSE RD, SUITE 101 • LOGAN UT 84321 435.713.0099 OFFICE 435.713.0055 FAX • [e-mail]
6. Just confirming but the well goes straight to the distribution system correct? Or does the water go into a storage tank first before going to the distribution system? a. Response: The well goes to the existing Green Canyon water storage tank before
going to the distribution system. An exhibit showing the proposed water line from Well #5 has been included. The water is then discharged from the storage tank to the distribution system. Included with this document are the revised construction documents and an exhibit showing the
proposed connection to the existing storage tanks. If you have any additional questions, let me know. Sincerely,
Ashley McAllister [e-mail] Lance Anderson, P.E. [e-mail]