DDW-2024-007197

3/4/24, 2:14 PM State of Utah Mail - Project Notification - WIP2022 Concrete Tanks Project
https://mail.google.com/mail/u/0/?ik=f3bcb897f8&view=pt&search=all&permmsgid=msg-a:r-4350393905675490008&simpl=msg-a:r-43503939056754…1/2
J. Paul Wright <[e-mail]>
Project Notification - WIP2022 Concrete Tanks Project
J. Paul Wright <[e-mail]>Wed, Jan 17, 2024 at 3:19 PM
To: Ryan LeBaron <[e-mail]>, Tracy Feltner <[e-mail]>, Vern Maloy <vmaloy@sunrise-
eng.com>
Ryan,
Based on our phone conversation, it sounds like these tanks are going to be a part of two different water systems.
The larger tank is going to be part of Central Iron Co WCD (11085) as you already included on the PNF.
The smaller tank will be part of the Cedar Highlands Subdivision (11042) which is also operated by the Central Iron Co
WCD.
I will need separate PNFs for each project. If possible, can you separate out the plans since they are different water
systems and will each have their own plan review file number.
Also, I had mentioned that more information about the chlorinator will be needed. Even though these chlorinators are
being electively installed, I still have to include all of the following information (also see attached section from the plan
approval letter). This is information we need because there will be necessary reporting and residual sampling as well as
probably some assessment monitoring at the sources of water (routine bacteriologic sampling prior to chlorination from
the source sample taps) for a period of time after the chlorinators are installed. The following information is a boiled down
summary of what we include in the plan approval letters and you will need to coordinate with Central Iron Co WCD on
some of these (in particular the Point of Entry sample location).
1. The name of each chlorinator for our database, the chlorinator type, and the chlorine type make and model
2. The name of the source (with WSXXX source number) that each chlorinator will treat
3. Secondary disinfection is what is being done
4. Where is the water conveyed to after chlorine is injected (a tank (which one), distribution directly, etc.)
5. Make sure the chemical is ANSI/NSF 60 certified
6. The design target dose at injection and the flow rate of each source that is being treated
7. Will the dose be able to be adjusted automatically (flow paced) or manually based on a constant flow rate from
the source
8. A Point of Entry (POE) sampling location will need to be identified for each chlorinator, prior to the first customer
connection to verify that at least a residual 0.2 ppm of chlorine is at that point. Each POE will need to be
sampled once per day to verify this. There is also a reporting sheet (attached) for each chlorinator. This is all in
addition to the 3 times weekly residual taken throughout the distribution system.
[Quoted text hidden]
--
J. Paul Wright, P.E. | District Engineer | Southwest Utah District
435.986.2590 (office) | 435.680.0163 (cell) | 435.986.2595 (fax)
620 S 400 E #400, St. George, UT 84770
DEQ WEBSITE
Emails to and from this email address may be considered public records and thus subject to Utah GRAMA requirements.
2 attachments
PA for each chlorinator.docx
14K
3/4/24, 2:14 PM State of Utah Mail - Project Notification - WIP2022 Concrete Tanks Project
https://mail.google.com/mail/u/0/?ik=f3bcb897f8&view=pt&search=all&permmsgid=msg-a:r-4350393905675490008&simpl=msg-a:r-43503939056754…2/2
Operational Report_GWRD Secondary_Final.xlsx
50K
3/4/24, 4:54 PM State of Utah Mail - Central Iron County WCD EightMile 4.0 MG Tank and Chlorinator Project (Project #13636, System #11085)
https://mail.google.com/mail/u/0/?ik=f3bcb897f8&view=pt&search=all&permthid=thread-a:r-3128126002232206922&simpl=msg-a:r401785720462374…1/2
J. Paul Wright <[e-mail]>
Central Iron County WCD EightMile 4.0 MG Tank and Chlorinator Project (Project
#13636, System #11085)
1 message
J. Paul Wright <[e-mail]>Mon, Mar 4, 2024 at 4:54 PM
To: Ryan LeBaron <[e-mail]>, Vern Maloy <[e-mail]>
Cc: Tracy Feltner <[e-mail]>
Ryan,
I have reviewed the plans for this project and I have the following comments:
The “DRAFT” stamp needs to be removed from the plans and submied and final/ready for construcon
Chlorinator
1) Is the chlorinator just a booster chlorinator? If so, I will have to ask the DDW about Point of Entry (POE). I think
the analyzer would be good, but do you know if all the wells will pump directly to this new tank or do they go through
the distribuon system? The reason I ask is because you menoned there are already POE sample sites, which they
probably don’t have already, since older chlorinators do not have these designated, but I know all these wells have
exisng chlorinators, or are they planning on removing them and using this one exclusively?
2) The queson sheet for the chlorinator that I sent you shows that the dose will be 5 mg/l, which is above the
Maximum Contaminant Level of 4 mg/l for chlorine. Did you mean 0.5 mg /l since the required level is only 0.2 mg /l at
the POE?
3) Separate switches are required outside of the chlorine room for fans and lights? Does the design have separate
switches for each?
4) It appears that the air intake louvers are located near the ceiling. However, I could not tell whether the exhaust fan
is drawing from near the floor (it appears to discharge through the roof vent). I just want to make sure this is the
case.

Tank
5) I could not find in the plans where the required slope of the roof and floor is indicated. This should be shown in
detail so that drainage is obtained.
6) The air vent pipe penetraon detail G on Sheet S9 shall meet the following from the rule: (no curb is shown)
Vent pipes, in addion to seepage rings, shall have raised concrete curbs that direct water away from the vent
pipe and are formed as a single pour with the roof deck.
7) The air vent detail G on Sheet S9 does not show how high above the tank surface it needs to be. This dimension
should be added.
8) The access hatch details D on Sheet S10 needs to have enough detail to show the minimum requirements that it is
raised up at least 4 inches above the concrete curb, with a 2-inch shoebox close fing downturn, lockable, and has a
gasket on the underside with no penetraons through the hatch lid.
Let me know if you have any quesons.
Paul
3/4/24, 4:54 PM State of Utah Mail - Central Iron County WCD EightMile 4.0 MG Tank and Chlorinator Project (Project #13636, System #11085)
https://mail.google.com/mail/u/0/?ik=f3bcb897f8&view=pt&search=all&permthid=thread-a:r-3128126002232206922&simpl=msg-a:r401785720462374…2/2
--
J. Paul Wright, P.E. | District Engineer | Southwest Utah District
435.986.2590 (office) | 435.680.0163 (cell) | 435.986.2595 (fax)
620 S 400 E #400, St. George, UT 84770
DEQ WEBSITE
Emails to and from this email address may be considered public records and thus subject to Utah GRAMA requirements.