HomeMy WebLinkAboutCCOR 06-03-2026 792-146 to 792-148Concrete Construction Observation Report
The S.W.COLE field representative is on-site at the request of our client to provide construction materials testing and to observe and document construction activities. The Contractor has soleresponsibility for schedule, site safety, methods, completeness and quality control.
58 Norfolk Ave, Easton, MA 02375 • Tel 508 822 6934 • www.swcole.com
Project Name:Town of Yarmouth Water Resource Recovery Facility Project NO.:25-0468Location:Yarmouth MA Date:6/3/2026
Client:Wright-Pierce Client Rep:Eric SaloWeather:Clear 60 - 70°F S.W.COLE Rep:Mohammed Rifaz
General Contractor:CDM Smith Time Onsite:06:30 - 12:30
Placement Type: Footing Wall Slab OtherPlacement Location:SBR Walls 19 & 12 and SBR Tank 1 (Four Structural Columns).
Concrete Placement Observations Observed Comments
Required mix used Yes Mix-1 4500PSl strength, 1-1/2in. Aggregates and
Sika control 75, Energy surcharge admixtures. Mix-2
4500PSl strength,3/4in. Aggregates and Sika control
75, Energy surcharge admixtures.
Concrete properly conveyed to all areas of placement Yes Concrete placed evenly along SBR wall and tank
with no segregation observed.
Internal vibration / consolidation of concrete Yes Proper vibration carried out using mechanical hand
vibrators; concrete well consolidated with no visible
voids.
Field Testing of Concrete performed:No
*CYLINDER SET NO:792-146 to 792-148 *Refer to associated concrete test report
Notes:
As requested by Reissa, S.W.COLE rep was onsite to perform Concrete Field Testing services.
S.W. Cole Engineering Construction Services Technician Mohammed Rifaz arrived onsite at
approximately 06:30 AM to observe concrete placement activities and perform field testing at
the placement locations noted below.
Upon arrival, Mohammed Rifaz met with Rayssa Fonte, who provided information regarding
the day’s planned concrete placement activities.
SBR Walls 19 & 12
Concrete was delivered by Cape Cod Ready Mix and consisted of a 1½‑inch aggregate,
4,500‑psi concrete mix with Sika Control 75 and an energy surcharge.
Approximately 111.0 cubic yards of concrete were placed at SBR Walls 19 and 12.
Specified Mix Requirements
Slump: 7.0 to 10.0 inches
Air Content: 3.0% to 6.0% (air‑entrained)
Concrete samples were collected from the first and tenth loads, and standardized field testing
was performed with the following results:
1st Load – Truck No. 51
Slump: 6.0 inches
Air Content: 4.5%
Concrete Temperature: 68°F
Concrete Construction Observation Report
The S.W.COLE field representative is on-site at the request of our client to provide construction materials testing and to observe and document construction activities. The Contractor has soleresponsibility for schedule, site safety, methods, completeness and quality control.
58 Norfolk Ave, Easton, MA 02375 • Tel 508 822 6934 • www.swcole.com
10th Load – Truck No. 64
Slump: 7.5 inches
Air Content: 4.0%
Concrete Temperature: 74°F
Two sets of five (5) 6‑inch by 12‑inch concrete cylinders were cast from the first and tenth
loads for laboratory compressive strength testing at 7, 14, and 28 days (two cylinders at 28
days). One additional cylinder from each set was cast for hold purposes.
SBR Tank 1 Columns
Concrete was delivered by Cape Cod Ready Mix and consisted of a ¾‑inch aggregate,
4,500‑psi concrete mix with Sika Control 75 and an energy surcharge.
Approximately 18.0 cubic yards of concrete were placed for the SBR Tank 1 columns.
Specified Mix Requirements
Slump: 7.0 to 10.0 inches
Air Content: 3.0% to 6.0% (air‑entrained)
A concrete sample was collected from the first load, and standardized field testing was
performed with the following results:
1st Load – Truck No. 67
Slump: 7.5 inches
Air Content: 3.8%
Concrete Temperature: 75°F
One set of five (5) 4‑inch by 8‑inch concrete cylinders was cast from the first load for
laboratory compressive strength testing at 7, 14, and 28 days (two cylinders at 28 days). One
additional cylinder was cast for hold purposes.
Attachments: 3 Photos Reviewed by:6/4/2026 Kaylie O'Su iv Kaylie O'Sullivan
Concrete Construction Observation Report
The S.W.COLE field representative is on-site at the request of our client to provide construction materials testing and to observe and document construction activities. The Contractor has soleresponsibility for schedule, site safety, methods, completeness and quality control.
58 Norfolk Ave, Easton, MA 02375 • Tel 508 822 6934 • www.swcole.com
Concrete Construction Observation Report
The S.W.COLE field representative is on-site at the request of our client to provide construction materials testing and to observe and document construction activities. The Contractor has soleresponsibility for schedule, site safety, methods, completeness and quality control.
58 Norfolk Ave, Easton, MA 02375 • Tel 508 822 6934 • www.swcole.com