51-IFB-1905464974-WAX - Duncan VIPER Tower Rebuild - Addendum 1.pdf

North Carolina State Highway Patrol

Josh Stein Governor

Freddy L. Johnson, Jr.

Commander

MAILING ADDRESS:

4231 Mail Service Center Raleigh, NC 27699-4231 www.ncshp.gov

An Equal Opportunity Employer

OFFICE LOCATION:

512 N. Salisbury St.

Raleigh, NC 27604

Telephone: (919) 733-7952 Fax: (919) 715-4059

Purchasing

IMPORTANT BID ADDENDUM

December 12, 2025

BID Number: 51-IFB-1905464974-WAX COMMODITY/SERVICE: 721516 ADDENDUM Number: 01 USING AGENCY: State Highway Patrol PURCHASER: Angela Wainright OPENING DATE/TIME: December 22, 2025 at

2:00PMET

INSTRUCTIONS:

1. Please see Duncan – Foundation Mapping Report Below

July 10, 2013

Barbara Toumbalakis Tower Engineering Professionals

Motorola Solution, Inc. 3703 Junction Boulevard

8757 Red Oak Blvd., Suite 220 Raleigh, NC 27603

Charlotte, NC 28217 (919) 661-6351

(704) 357-9768

Subject: Foundation Mapping Report (Non-Destructive and Destructive)

Motorola Solutions Designation: Motorola Solution Site Number: HP-1071

Motorola Solution Site Name: Duncan

Engineering Firm Designation: TEP Project Number: 33142-8516

Site Data: Christian Light Road

Duncan, Harnett County, NC 27526

Latitude N 35° 33' 01”, Longitude W 078° 51' 04”

240 Foot – Guyed Tower

Dear Ms. Toumbalakis, Tower Engineering Professionals (TEP) is pleased to submit this “Foundation Mapping Report” to Motorola Solution

Inc. for the above referenced site. The onsite investigation was performed by A.J. Ingalls, E.I. and Jeff Burnett of

Tower Engineering Professionals, Inc. during the July 10, 2013 site visit.

The non-destructive foundation mapping was to include location of all tower foundation(s)/anchors relative to the tower base and magnetic north, depth below grade and measurement of all external tower foundation/anchor dimensions. For self-support and guyed towers, the tower legs were named by letter according to the magnetic azimuth defined by a line from the center of tower to the leg, with the “A” leg being the leg closest to magnetic north, followed clockwise by “B” and “C”.

We at Tower Engineering Professionals, Inc. appreciate the opportunity of providing our continuing professional services to you and. Motorola Solution Inc. If you have any questions or need further assistance on this or any other projects please give us a call.

Sincerely, A.J. Ingalls, E.I.

Tower Engineering Professionals, Inc.

Tower Foundation Mapping Report July 10, 2013

TEP Project Number 33142-8516 HP-1071 Duncan

Tower Engineering Professionals 3703 Junction Boulevard, Raleigh, NC 27603 (o) 919-661-6351 (f) 919-661-6350 www.tepgroup.net

1) DATA COLLECTION PROCEDURES (Mast):

A) Method of Data Collection

TEP field technicians performed data collection utilizing GSSI Ground Penetrating RADAR (GPR) for non-caisson foundations. Data gathered utilizing the GPR technology is collected in a grid pattern over the suspected location of a “dead-man” anchor, pad and pier or pile foundation. The GPR detects differences in dielectric properties which vary from material to material. The depths of the different materials are calculated based on the frequency of the electromagnetic wave used and the time required to detect a return

(reflection).

B) Limitations of Data Collection

The accuracy of data collected using ground penetrating radar (GPR) is dependent on several factors.

Topography extremes such as steep slopes and uneven terrain and ground cover such as tall foliage will prevent the GPR’s antenna from making continuous contact with the testing surface resulting in false readings. Anchor modifications, such as above grade concrete slabs, will prevent the GPR from reliably reading reflections from the original anchor beneath resulting in incomplete anchor foundation data. Soil type and water content directly affect the dielectric constant and can vary significantly within the testing area. In areas where the soil dielectric is similar to that of the anchor materials used, GPR will not be able to distinguish between the soil and anchor material. In areas involving rock embedment of the foundations, the depth of the foundations will not be able to be confirmed. Overspill, uneven concrete and a concrete anchor of generally poor condition will also distort GPR readings, misrepresenting the anchor foundation’s actual dimensions. GPR can also be hindered by high water tables as the high water content can prevent recognition of structural members beneath such as the piles on a pile cap foundation. The presence of water, metal or electromagnetic radiation in the data collection area can severely deteriorate the GPR’s performance. TEP cannot guarantee any subsurface measurements and assumes no liability for any assumptions made with the inferred dimensions provided from the GPR.

2) ANALYSIS PROCEDURES:

A) Assumptions

TEP assumes a homogenous concrete caisson and homogeneous soil type in the site area. TEP assumes all foundations are in good condition with no defects such as fractures, breaks, voids, soil intrusion, etc.

B) Method of Analysis

GSSI RADAN Subsurface Imaging software is used to analyze field collected site data. The imaging software turns the raw data of time and signal strength into a two dimensional “cross sectional” image of the ground surveyed. The image gives a visual representation of where along a signals path the dielectric constant (and therefore the medium) changes. Using the above mentioned assumptions and expected results, TEP analyzes the GSSI RADAN image to calculate the dimensions and depth of the concrete foundation.

C) Limitations of Analysis

As is the case with all non-destructive testing, no guarantees can be given. Every effort is made while in the field to collect all relevant information and analysis is limited to that information. Field analysis of soil type is used in the collection of data and cannot be significantly altered in the office. Relevant information is not always available and educated assumptions are required for data analysis. While GSSI RADAN can be used to interpret several types of data, it is fundamentally only a distinguisher of dielectric constant differences.

TEP cannot guarantee any subsurface measurements and assumes no liability for any assumptions made with the inferred dimensions provided from the GPR.

3) DATA COLLECTION PROCEDURES (Anchors):

TEP field technicians perform all data collection by physical excavation of the foundation in question.

Experienced excavators are hired and met on location by TEP field technicians who closely direct all aspects of the excavation. Non-caisson tower masts are uncovered from exposed portions out with minimum disturbance of tower foundation and surrounding soil. Once the foundation is exposed, the TEP field technician will physically measure, record and photograph all relevant dimensions and foundation condition.

Upon completion of recording the relevant data, the exposed foundation is covered and the site is restored as close as possible to the way it appeared prior to the excavation. Dead man anchors are uncovered by digging to the side and behind of where the anchor rod enters grade. This is done to prevent damage to the anchor rod and to minimize disturbing the soil above and in front of the anchor as much as possible. (TEP will unearth the entire anchor rod for inspection purposes upon request.) Once the edge of the dead man anchor is exposed, the TEP field technician will physically measure and record the depth below grade, thickness and length of the exposed area. The width of the dead man anchor is measured from the anchor rod to the edge.

The anchor rod is assumed to be centered widthwise on the anchor foundation. Photographs of all relevant dimensions and the foundation’s condition are then taken. Upon completion of recording the relevant data, the exposed foundation is covered and the site is restored as close as possible to the way it appeared prior to the excavation. Excavation is the deemed to be the most accurate method for mapping a non-caisson foundation with the added benefit of discovering the material condition of the concrete anchor.

Pictures (Mast)

Pictures (Inner Anchor)

Pictures (Outer Anchor)