DDW-2024-011710

October 3, 2024
Dave Norman
Lehi City
2538 North 300 West
Lehi, Utah 84043
Subject:Plan Approval, Texas Instruments 2600 N to SR92 24-inch Diameter Water Line (DS001); Lehi City, System #25015, File #16245
Exception to R309-550-7(1) Minimum Separation Requirements for Texas Instruments 2600 N to SR92 24-Inch Diameter Water Line (DS001); Lehi City, System #25015, File #16245
Dear Dave Norman:The Division of Drinking Water (the Division) received the plans and specifications for Texas Instruments 2600 N to SR92 24-Inch Diameter Water Line from your consultant,
Greg Thomas and Hansen, Allen & Luce, Engineers on September 10, 2024. This project has met the conditions for receiving a plan approval.
On August 26, 2024, the Division of Drinking Water (the Division) also received your request for an exception to Rule R309-550-7(1), Separation of Water Mains and Transmission Lines
from Sewers and Other Pollution Sources for the Texas Instruments 2600 N to SR92 24-Inch Diameter Water Line. This rule states specifically that the horizontal distance between pressure
water mains and sanitary sewer lines shall be at least ten feet and that where a main and a sewer line must cross, the water main shall be at least 18 inches above the sewer line.
Plan Approval
Our understanding of the project is the construction of 5,987 feet of 24-inch diameter ductile iron pipe (DIP) and appurtenances for a drinking water transmission pipeline. (identified
as DS001 in
the Division’s database). The pipeline is to be located within Lehi, Utah from 2600 North to 3200 North along 600 East, and along 3200 North to 810 East, along 810 East to the Lehi City
PI Pond site, through the Lehi City PI pond site to south of SR-92.
We have completed our review of the plans and specifications, stamped, and signed by Gregory S Thomas, P.E., dated September 9, 2024,and find they basically comply with the applicable
portions of Utah’s Administrative Rules for Public Drinking Water Systems in R309. On this basis, the plans for Texas Instruments 2600 N to SR92 24-Inch Diameter Water Lineare hereby
approved.
This approval pertains to construction only. An Operating Permit must be obtained from the Director before Texas Instruments 2600 N to SR92 24-Inch Diameter Water Line may be put in
service. A checklist outlining the items required for operating permit issuance is enclosed for your information.Approvals or permits from the local authority or the county may be necessary
before beginning construction of this project. As the project proceeds, a notice of any changes in the approved design, as well as any change affecting the quantity or quality of the
delivered water, must be submitted to the Division. We may also conduct interim and final inspections of this project. Please notify us when actual construction begins so that these
inspections can be scheduled.
This approval must be renewed if construction has not begun or if substantial equipment has not been ordered within one year of the date of this letter.
Exception to R309-550(7)(1) – Minimum Separation Requirements
The basis for your request for an exception to R309-550-7(1) is that due to existing road constraints and existing utilities the required horizontal and vertical separations can not
be meet, at the following locations:
600 East (PP-1, Sta 0+89 to 3+81) - 8-foot min horizontal separation
600 East (PP-2 to PP-6, Sta 9+06 to 27+06) - 6-foot min horizontal separation
3200 North (PP-6 to PP-7, Sta 27+36 to 31+44) - 9-foot min horizontal separation
810 East (PP-10, Sta 40+15) - 14 inches vertical separation
810 East (PP-11, Sta 43+51) - 17 inches vertical separation
You propose to meet the intent of the rule, that the entire length of the new 24-inch diameter DIP water pipeline will be mechanically restrained using TR Flex joints and mechanical
joint restraints. All vertical crossings will be above the existing sewer at 14 and 17-inch diameter, respectively.
On this basis, an exception to R309-550-7(1), Separation of Water Mains and Transmission Lines from Sewers and Other Pollution Sources, is hereby granted for the above listed locations.This
exception may be rescinded any time if new evidence indicates that the conditions of this exception are no longer being met or a public health risk exists due to this exception.
Please maintain a copy of this letter with your permanent records for future reference.
If you have any questions regarding this approval, please contact Brent Arns, of this office, at [phone], or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
BA/mrn/mdbEnclosures –Operating Permit Checklistcc:Daymon Swenson, Utah County Health Department, [e-mail] Thomas, Hansen Allen & Luce, [e-mail]
Norman, Lehi City, [e-mail] Rowlett, Lehi City, [e-mail] Martin, P.E., Division of Drinking Water, [e-mail] Arns, Division of Drinking Water,
[e-mail] Arns 25015 16245 PA Lehi 24_ Texas Instruments Water Line Sewer Separation
Utah Division of Drinking Water ― Checklist for Issuing Operating PermitsWater System Name:System Number: Project Description:File Number:
Items 1 through 8 below must be submitted to the Division and found to be acceptable prior to operating permit issuance (unless a water line project meets the requirements of R309-500-7
and is not required to obtain an Operating Permit).
Distribution lines (not including in-line booster pump stations) requiring Plan Approval may be placed into service prior to submitting all of the following items and receipt of Operating
Permit if the water system has received items 1 and 4 below.☐1.Certification of Rule Conformance by a professional engineer (P.E.) that all conditions of Plan Approval were accomplished,
and if applicable, changes made during construction were in conformance with rules R309-500 through 550☐2.As-built or record drawings incorporating all changes to approved plans and
specifications (unless no changes were made to the previously approved plans during construction)☐3.Confirmation that as-built or record drawings have been received by the water system☐4.Satisfactory
bacteriological samples as evidence of proper disinfection and flushing in accordance with the appropriate ANSI/AWWA standards:
☐ANSI/AWWA C651-14 AWWA Standard for Disinfecting Water MainsTwo consecutive sample sets at least 16 hours apart, none positive (e.g., every 1,200 feet, end-of-line, each branch)☐ANSI/AWWA
C652-11 AWWA Standard for Disinfection of Water-Storage FacilitiesOne or more samples, none positive☐ANSI/AWWA C653-13 AWWA Standard for Disinfection of Water Treatment PlantsTwo consecutive
samples per unit, none positive, no less than 30 minutes apart☐ANSI/AWWA C654-13 AWWA Standard for Disinfection of WellsTwo consecutive samples, none positive, no less than 30 minutes
apart☐5.Water quality data, where appropriate [For example, include raw and finished water data that demonstrate satisfactory performance of the treatment facility; sample should be
taken from a storage tank for residual volatile organic compounds after tank interior re-coating; etc.]☐6.If applicable, all other documentation that may have been required during the

plan review process☐7.If applicable, confirmation that the water system owner has received the O&M manual for the new facility☐8.If applicable, location data of new storage tank, treatment
facility, or source