Frederick County Public Schools Board of Education Building

OVERVIEW

The Board of Education Building Project for Frederick County Public Schools was a design/build that consists of approximately 90,000SF and five-stories. The structure was built with cast-in-place concrete columns and walls with post-tensioned slabs on a caisson foundation system. The site (known as Site G) is located in known Karst geology, specifically the Lime Kiln member of the Frederick Formation. Approximately 5-feet of uncontrolled fill were found on the site with residual soils and limestone rock beneath the fill.

FACTS

Environmental Consulting Services provided by Specialized Engineering consisted of a Phase 1 Environmental Site Assessment (ESA) and Phase 2 ESA where several concerns were studied. Additional sampling and testing was provided to establish a grid for determining the extent of contaminated vs. non-contaminated soils. Results indicated soils onsite were contaminated with traces of lead, arsenic, and Total Petroleum Hydrocarbons (TPH). Consulting and monitoring services were provided under the Brownfield Voluntary Cleanup Program that the City of Frederick entered into through the Maryland Department of the Environment (MDE). In addition, a Remedial Action Plan (RAP) was provided. Removal of contaminated soils was supervised by Specialized Engineering per MDE regulations and the RAP recommendations.

The Geotechnical Engineering Services provided were separated into three phases. In total, services included the performance of a subsurface investigation through the drilling of 12 soil borings, an electrical resistivity (ER) survey, and an air track study. Three borings contained rock cores. The rock cores varied from very poor to excellent. Three monitoring wells were also installed. As a result of the ER survey, possible soil-filled and air-filled voids were located at multiple locations. Air-track drilling was conducted in select locations where possible voids were previously identified.

Field Quality Assurance/Quality Control Services included the monitoring and tracking of fill materials in accordance with the MDE agreement with the City of Frederick and project documents. Also, subsurface interpretation of rock suitability; review of laboratory data for soil analysis and construction suitability in embankments; testing and inspection of soil compaction, rebar, cast-in-place concrete, caissons, mortar and grout, structural steel, light gauge metal, post-tensioning tendons; and providing engineering analysis and design recommendations during construction for any specific site conditions that require such services.

Laboratory Testing & Analysis Services included that of proposed structural fill and utility backfill materials, cast-in-place concrete cylinders, and structural masonry mortar and grout. Wish to learn more about our involvement with this project? Please contact us at 800-773-3808.

The John F. Kennedy Center for the Performing Arts

OVERVIEW

The John F. Kennedy Center for the Performing Arts project was put on a fast-track schedule. It consisted of two new 3-story parking garage structures. These structures were expansions of the existing parking garages (consisting of approximately 350 exterior parking spaces) on the north and sound ends of the Kennedy Center. The finished expansions added approximately 601 interior parking spaces and 350 exterior parking spaces.

FACTS

Specialized Engineering was responsible for providing onsite Environmental Consulting Services consisting of a Phase 1 Environmental Site Assessment (ESA) and Phase 2 ESA. As a result of the firm’s assessments, coal tar remnants were discovered in the soil dude to past uses of the site. Several hundred years earlier, oils and fuels were developed onsite that were used to light many lamps around the District. This was the apparent source of contaminates. Due to the discovery of contaminated soils onsite, Specialized Engineering developed a remediation plan and provided the monitoring and documentation during the removal of the contaminated soils.

Specialized Engineering provided subsurface investigations, design study of marine retaining structures, and foundation investigation and design with caissons placed directly adjacent to the Potomac River. The high water level conditions and serious environmental concerns required Specialized Engineering’s engineers and geologists to carefully monitor each caisson for proper bearing and hazardous air, soil, and water conditions. The water constantly being pumped out was tested, treated, and removed from the site under the supervision of Specialized Engineering staff.

Material Testing and Inspection Services provided on the following materials during each phase of construction:

  • Foundation Soil Bearing
  • Structural Fill
  • Utility Backfill
  • Concrete Reinforcement
  • Cast-In-Place Concrete
  • Structural Masonry (Mortar/Grout)
  • Structural Steel Welded & Bolted Connections
  • Wall Panels
  • Spray Fire-Resistant Materials

Specialized Engineering conducted laboratory testing and analysis of proposed fill/backfill/aggregate materials, concrete cylinders, mortar, grout, water, and fireproofing density samples, in addition to, verification of material quality in the firm’s AASHTO-accredited laboratories as per the project’s quality control program. Wish to learn more about our involvement with this project? Please contact us at 800-773-3808.

Georgetown Waterfront Park – Phase 2

OVERVIEW

The Georgetown Waterfront Park site is located on the former site of a power plant which powered the DC trolley system. It was rumored to contain considerable amounts of debris underground from the past 200 years. The second phase of the project is anticipated to be completed by the end of 2010. Once complete, Phase 2 will extend from Wisconsin Ave, NW to 31st Street, NW and will include the central plaza. The plaza will include a fountain, a pergola laced with flowing vines to shade park benches, and a stepped bulkhead along the Potomac River with designed seating.

FACTS

Specialized Engineering was responsible for providing initial site characterization sampling, preparation of the Corrective Action Plan (CAP), testing and inspection services in accordance with the CAP, and monitoring of site excavation.

Specialized Engineering performed a subsurface investigation of Phase 2 due to the concerns of buried debris and unknown site conditions. Through numerous borings, Specialized Engineering determined there was a considerable amount of fill beneath the debris. It was recommended that the stepped bulkhead be supported on H-piles driven to the natural ground, which is estimated to be at a depth of more than 30-feet below the existing surface, along with the installation of a permanent sheet pile wall at the edge of the water to prevent scour of the bulkhead.

Additionally, Specialized Engineering continues to provide Geotechnical Consultation Services on an as-needed/on-call basis.

Additionally, Material Testing and Inspection Services are being provided on the following materials during construction:

  • Subgrade Material
  • Structural Fill
  • Utility Backfill
  • Concrete Reinforcement
  • Cast-In-Place Concrete

Specialized Engineering is conducting laboratory testing and analysis of proposed fill/backfill/aggregate materials, and concrete cylinders, in addition to, verification of material quality in the firm’s AASHTO-accredited laboratories as per the project’s quality control program. Wish to learn more about our involvement with this project? Please contact us at 800-773-3808.

D.C. Department of Employment Services

OVERVIEW

The DC Department of Employment Services (DOES) project is a brand new, 300,000SF structure completed within a 26 month construction schedule. The project included five-stories above grade for office space and 1.5 stories below grade dedicated to underground parking. The building was constructed with a steel and cast-in-place concrete frame and precast concrete panels.

FACTS

Specialized Engineering was responsible for Quality Assurance/Quality Control (QA/QC) Services consisting of monitoring and documenting contractor activities and installation methods to ensure the project was being constructed according to project documents, DC regulations, and the approved quality control program. Additionally, observation and verification were provided during the installation of rapid impact aggregate pier deep foundation system. Material Testing and Special Inspection Services provided on the following materials during each phase of construction:

  • Structural Fill
  • Utility Backfill
  • Concrete Reinforcement
  • Cast-In-Place Concrete
  • Floor Flatness/Floor Levelness
  • Structural Masonry (Mortar/Grout)
  • Structural Steel Bolted and Welded Connections
  • Waterproofing Roofing

Specialized Engineering conducted laboratory testing and analysis of proposed fill/backfill/aggregate materials, and concrete cylinders, and structural mortar and grout. Additionally, verification of material quality in the firm’s AASHTO-accredited laboratories as per the project’s quality control program. Wish to learn more about our involvement with this project? Please contact us at 800-773-3808.