FY'25 IOT2 Areawide Sanitary Sewer Rehabilitation

Page 1
TO: E-mail Distribution
RE: GEOTECHNICAL REPORT TRANSMITTAL
The City of Tulsa provides the attached document(s) with the following conditions:
A. The Geotechnical Report is not part of the construction documents. The Geotechnical Report is
provided for informational purposes only, to assist the Contractor in understanding the general
subsurface conditions at the site. The report presents the data and findings of the geotechnical
engineer at the specific boring locations and times of the investigation.
B. The Contractor is solely responsible for all interpretations, conclusions, and deductions drawn from
the Geotechnical Report concerning the conditions at the site affecting the execution of the Work,
including, but not limited to, the subsurface conditions, the scope of work, means, methods,
sequencing, and pricing.
C. The City makes no warranty or representation, express or implied, as to the accuracy, completeness,
or interpretations of the data, information, and representations contained in the Geotechnical
Report. The information provided is not a substitute for the Contractor's own independent
investigation, judgment, and expertise.
D. The Contractor shall visit the site and make their own investigations. This will include any borings,
additional borings, and/or testing to determine actual subsurface conditions and the conditions
under which the Bid is to be prepared, and the Work is to be performed.
175 E. 2nd Street - 13th Floor, Tulsa, OK 74103 | (918) 596-9560

Construction Materials Testing * Special Inspections * Geotechnical Engineering
March 2, 2026
City of Tulsa
Public Works Department
2317 S Jackson Ave, Ste W107
Tulsa, OK 74107
(918)596-9614
Attn: Mr.Chris Gimmel, PE, CFM, Field Engineering Construction Manager
cgimmel@cityoftulsa.org
Re: Letter of Transmittal
Geotechnical Engineering Services| Project No. 19040326
City Project No. ES 2024-05 IOT2 FY25
2431 E 61st St, Tulsa, OK 74136
It has been a pleasure serving you on this project. AIMRIGHT has completed the requested
Geotechnical Engineering Services for the subject project at the reference site, and we are pleased to
providethis Letter of Transmittal summarizingthe findings from our geotechnical investigation.
Our Scope of Services consisted of the following:
1. Drilling one (1) soil test boringto a depthof approximately 25feet.
2. Performing laboratory testing on select soil samples obtained from the boring.
3. Providing a computer-generated boring log summarizing subsurface conditions including
descriptions of soil/rock stratigraphy, laboratory test results, and groundwater conditions.
The Boring Location Plan, Boring Log, and other supporting data are presented as attachments to this
letter. AIMRIGHT located the boring in the field by making measurements from known existing site
features. The boring location shown on the Boring Location Plan should be considered approximate.
The boring was advanced using an ATV-mounted drill rig equipped with an automatic hammer and
rotary continuous flight augers. Representative soil samples were obtained using a standard 2-inch
outside diameter split-barrel sampler in general compliance with the Standard Penetration Testing
(SPT) method of the American Society of Testing and Materials (ASTM) D1586 standard to evaluate
the consistency and general engineering properties of the subsurface soils.
The number of blows required to drive the split-barrel sampler three (3) consecutive 6-inch increments
is recorded, and the blows of the last two 6-inch increments are added to obtain the SPT N-value in
blows per foot (bpf) representing the penetration resistance of the soil. Upon encountering 50 blows
2120 South 130thEast Avenue*Tulsa,OK 74134*(918) 392-8431*www.aimrighttesting.com

within any 6-inch increment, N-values are recorded as 50/measured penetration in inches. At regular
intervals within the boring, split-spoon samples were visually classified based on texture and plasticity.
During the drilling process, all encounters with groundwater, if any, were recorded. Upon completion
of drilling, the boring was backfilled per OWRB requirements and topped with concrete and/or asphalt
patch compound, if applicable.
The samples obtained from the geotechnical exploration were transported to the AIMRIGHT laboratory
where representative samples were selected for testing. Testing consisted of Atterberg limits, sieve
analysis, and determination of moisture content in general accordance with the ASTM testing
procedures.
We appreciate the opportunity to provide geotechnical consultation services for this project. We look
forward to serving as your geotechnical engineer and construction materials testing laboratory for the
remainder of this and future projects. Please do not hesitate to contact us with any concerns or
questions regarding the attached information.
Respectfully submitted,
Shon Jessee, P.E.
Senior Engineer
sjessee@aimrighttesting.com
(918)392-8431
14 Apr 2026
Letter of Transmittal -Geotechnical Engineering Services Page 2
ES 2024-05 IOT2 FY25
April 14, 2026

PROJECT: ES 2024-05 IOT2 FY25
CLIENT: City of Tulsa PROJECT NO.:19040326
PROJECT LOCATION: 2431 E 61st St, Tulsa, OK 74136
LOCATION: see Boring Location Plan ELEVATION: N/A
DDRRIILLLLEERR:: JJ.. RRiitttteerr LOGGED BY: M. Bonine DRILLING RIG: GeoProbe 7822
LOG OF
DRILLING METHOD: Rotary Continuous Flight Auger DATE: 03/20/26
BORING B-1 DEPTH TO WATER> INITIAL: 8 ft AT COMPLETION: 8 ft CAVING>
0 TOPSOIL - 6 inches
0.5 3 19.2
1 LEAN CLAY medium stiff to very soft, dark brown, moist
6 20.3
2
3
CL 4 21.0 88.8 32 18 14
4
5
6 WOH 20.6
7
8
8.5
2 21.5
9 LEAN TO FAT CLAY
soft, brown mottled gray, wet
10
11
12
13
13.5
WOH 18.0
14 LEAN CLAY w/ sandstone fragments or lenses
very soft, brown, wet
15
16
17
18
18.5
WOH 23.1
19 LEAN TO FAT CLAY
very soft to soft, brown, wet
20
21
22
23
2 25.0
24
25
Boring terminated at 25 ft.
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KEY TO SYMBOLS
Symbol Description
Strata Symbols
Topsoil
Low Plasticity Clay
Low to High Plasticity Clays
Misc. Symbols
Water Table during Drilling
Water Table at Boring Completion
Soil Samplers
Standard Penetration Test