Wastewater Infrastructure Improvements
Otsego West
WWTF Phase 1
Specialized materials testing and structural observations for critical municipal utilities Phase 1 Expansion.
Firm Description: Braun Intertec
- Market Leadership & Legacy: Established in 1957, Braun Intertec has grown from a local testing laboratory into a premier engineering, environmental consulting, and testing firm. Headquartered in Minneapolis, the firm operates dozens of offices across the central United States, providing highly specialized technical support for critical public infrastructure projects, including wastewater treatment facilities.
- Professional Integrity through Employee Ownership: As a 100% employee-owned (ESOP) company, Braun Intertec prioritizes long-term quality and technical excellence. This ownership structure incentivizes every field technician and professional engineer to maintain the highest standards of professional practice and client communication. Every staff member is personally invested in the "Science You Build On."
- Rigorous Technical Accreditation: All testing services are conducted in accordance with rigorous industry standards, including ASTM International and the American Concrete Institute (ACI). Their laboratories are regularly audited and accredited to ensure precision, repeatability, and proper calibration of all testing equipment used in municipal utility projects.
- Broad Engineering Capabilities: The firm’s capabilities extend far beyond construction materials testing (CMT), encompassing geotechnical engineering, environmental site assessments, forensic engineering, and non-destructive testing (NDT). This breadth allows for a holistic approach to project safety and risk management for the City of Otsego.
- Proactive Safety Culture: Braun Intertec maintains a proactive safety culture, evidenced by their comprehensive internal training programs. They focus on identifying and mitigating potential hazards on construction sites to protect both their personnel and the client's project assets, ensuring that safety protocols never compromise technical data collection.
- Regional Expertise & Accessibility: By maintaining a significant presence in Minnesota, the firm combines the resources of a large national entity with the nuanced understanding of local geological conditions, seasonal construction variables, and regional building codes specific to the Upper Midwest.
- Quality Assurance Processes: Every project is overseen by senior project managers and professional engineers who review all technical reports before they are released. This multi-layered review process ensures data integrity and regulatory compliance for every masonry, steel, and concrete inspection performed during the WWTF Phase 1 improvements.
Scope of Services
- Structural Steel Observations: A critical component of the Phase 1 improvements involves structural steel framework for the facility's various units. An ICC-certified Structural Steel Technician will perform visual inspections of connections, verifying bolt tensioning and weld quality. The scope allocates approximately 45 hours for these observations to ensure the structural skeleton meets all design specifications.
- Masonry Observations and Testing: Activity 1.4 includes specialized masonry observations for the ADM and PTB units. Technicians will perform site visits during grout placement and cast grout specimens (ASTM C 1019) to verify compressive strength. Individual masonry block units will also be tested per specimen to confirm they meet the required load-bearing capacities before wall construction.
- Concrete Slab-on-Grade Verification: The project requires extensive testing of slabs-on-grade and trench drains across multiple units, including the FSB and PTB structures. Technicians will observe the placement of these slabs to ensure proper subgrade preparation, reinforcement placement, and concrete thickness, mitigating the risk of future cracking or settlement.
- Specialized Structural Slabs & Beams: The SBT and MTB units feature complex structural slabs and beams that require intensive monitoring. This includes checking reinforcement for the "Sump Encasement Foundations" specifically for the MTB unit and verifying the structural slab integrity for the FSB and BB areas.
- Concrete Toppings and Surface Work: Field inspections will extend to concrete toppings in the FSB and SBT areas, as well as the installation of exterior stoops. These elements are vital for facility access and secondary containment, requiring precise testing of bond strength and surface durability.
- Site Civil Improvements (Curb/Gutter/Sidewalk): Beyond the primary structures, site civil elements such as curbing and pedestrian sidewalks will undergo quality control testing. This ensures that the peripheral infrastructure supporting the West WWTF Improvements matches the longevity of the treatment systems.
- Generator Pad Foundation Analysis: Verification of the generator pad foundation is a high-priority item. The technician will confirm that the structural slab and reinforcement are sufficient to support the vibration and dead load of the facility's backup power systems during emergency operations.
- Slab-on-Deck Observations: For the FSB unit, slab-on-deck placement will be monitored to ensure proper bonding and reinforcement positioning. This is critical for the composite action of the floor system under the heavy mechanical loads typical of wastewater operations.
- Laboratory Analysis & Reporting: All physical samples—including masonry grout, blocks, and concrete cylinders—are processed in a controlled laboratory environment. Compressive strength tests are performed at specified intervals (7 and 28 days) to confirm that all structural components have reached their design f'c.
- Administrative Coordination: Senior engineering staff will provide oversight for all field activities, ensuring that technicians are dispatched in coordination with the contractor's schedule to avoid delays while fulfilling every requirement of the project's quality assurance plan.
Technical Standard: ASTM C 1019
ASTM C 1019 is the standard test method for sampling and testing grout. It is essential for determining the compressive strength of grout used in masonry, ensuring it achieves the proper bond with the masonry units to create a unified structural system capable of withstanding the facility's environmental stresses.
Technical Evaluation Criteria
Masonry Grout Strength: Compressive strength must meet or exceed design specifications as validated by ASTM C 1019 specimen testing (Activity 1.4 value: $2,202.00).
Structural Steel Integrity: Visual and physical verification of bolted and welded connections by an ICC-certified technician (Activity 1.5 value: $5,790.00).
Concrete Slab Compliance: Verification of grade, thickness, and reinforcement placement for structural slabs in FSB, SBT, and MTB units.
Glossary of Terms
ICC
International Code Council. Provides the certification standards for structural steel and masonry inspectors globally.
WWTF
Wastewater Treatment Facility. A complex system of structures designed to remove contaminants from municipal sewage before discharge.
ASTM C 1019
The specific regulatory standard for testing the compressive strength of grout used in reinforced masonry walls.
BRAUN INTERTEC
Proposal: QTB158028