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Geotechnical Exploration and Engineering Analyses Supporting Redevelopment Design and Construction Activities

2026-04-02T15:49:47-06:00October 22nd, 2009|Tags: |

The Britannia Modular Laboratories 4 (BML4) project, located in South San Francisco, California, consists of three existing buildings that have been renovated for conversion to laboratory and office use. This project involves demolition or upgrade of the structures, including the addition of a new pile-supported second floor mezzanine inside one building; new canopy entrances for each building; a new service yard for heavy equipment related to laboratory infrastructure; and new site work (parking lot, walkways, etc.) - all with challenging ground conditions. Geosyntec was selected by the conversion team to develop geotechnical engineering recommendations for foundations and other site infrastructure.

Field Exploration and Laboratory Testing Program to Support Gabion Wall Stability Assessment

2026-04-06T13:19:19-06:00October 22nd, 2009|

A Fortune 100 company requested that Geosyntec provide a technical assessment and evaluation of a 2,200-foot long gabion-faced combination gravity and mechanically stabilized earth wall at one of its major distribution centers in the eastern United States. Other retaining structures on the project site experienced significant movements or collapse. Previous consultants expressed concern regarding the long-term stability and distress for this wall such that the owner would be required to initiate major rehabilitation activities to stabilize it. The owner was actively considering complete wall rehabilitation at an estimated cost of $2.5 million.

Design of Foundation and Structural Integrity Support System for Soil Removal Beneath an Operating Manufacturing Facility

2026-04-02T15:50:26-06:00October 22nd, 2009|Tags: |

The owners of an active aircraft hydraulics manufacturing and testing facility in southwest Michigan were charged by state regulators with the removal of a large quantity of soil and other materials from beneath an active processing area known as the EPD Room. The owners turned to Geosyntec to engineer a system that would allow soil removal without disturbing foundation elements while maintaining the structural integrity of the active facility.

Design and Construction of a Slurry Wall and Engineered Cap for Site Redevelopment

2026-04-02T15:50:27-06:00October 22nd, 2009|Tags: |

A portion of the privately owned former industrial manufacturing site known as the "Route 44" property was impaired by the presence of contaminants from past site uses. Geosyntec was selected to develop an engineered solution for the containment and isolation of residual contaminants and to render the property suitable for redevelopment as a Brownfields site.

Construction Inspection Course for Mechanically Stabilized Walls and Reinforced Soil Slopes

2026-04-02T15:50:27-06:00October 22nd, 2009|Tags: |

Mechanically stabilized earth (MSE) walls are rapidly becoming more common than conventional cast-in-place concrete walls for a variety of highway and other civil applications. MSE walls and reinforced soil slopes (RSSs) consist of a geosynthetic material layered with compacted earth. Easily constructed and highly durable, these structures are inexpensive when compared with other more traditional wall or slope-construction methods, and can tolerate large differential settlements.

Innovative Foundation Improvement Technique Supports Massive MSE Wall Construction Initiative

2026-06-16T14:30:07-06:00October 22nd, 2009|Tags: , , |

The Cherry Island Landfill (CIL) is located in Wilmington, New Castle County, Delaware at the confluence of the Delaware and Christina Rivers. The Delaware Solid Waste Authority (DSWA) owns and operates the facility to serve the residential and commercial customers in the County. To meet the growing demands for MSW disposal space and optimize the existing investment in the Cherry Island site, DSWA established the goal of extending the life of the site by making the site foundation performance objectives for a new disposal structure achievable through ground improvement.

Geotechnical Design for Building Construction near Subway Tunnel and Other Subsurface Infrastructure

2026-04-02T15:49:55-06:00October 22nd, 2009|Tags: |

The new Ogden Elementary School is being constructed on the site of an existing elementary school by contractors for the Public Building Commission of Chicago (PBC) near downtown. Geosyntec was retained by the PBC to assist with the design of groundwater control measures and the earth retention structure (ERS) during the site preparation phase of work. Shallow groundwater and silty soil, which make dewatering efforts difficult, were documented as typical of the site. The scheduled opening of the new school was viewed by the client as a firm deadline that would not allow for any significant delay, so any necessary geotechnical design and construction had non-negotiable deadlines associated with them.

SSHAC Level 3 Seismic Hazard Update for the Diablo Canyon Power Plant

2026-04-02T14:31:20-06:00October 21st, 2009|Tags: , |

A seismic hazard update is currently being conducted for the Diablo Canyon Power Plant (DCPP) Site under the Senior Seismic Hazard Analysis Committee (SSHAC) Level 3 process. The SSHAC Level 3 process is a formal, structured procedure for developing Seismic Source Characterizations (SSC) and Ground Motion Characterizations (GMC), and has been identified in Nuclear Regulatory Commission regulatory guidance (RG 1.208) as an acceptable method for use in performing probabilistic seismic hazard analysis (PSHA) for nuclear sites.

The SSC and GMC for the DCPP site will involve complex assessments due to the location of the site within an active tectonic region of the United States. The seismic safety issues at DCPP will be subject to significant public and regulatory scrutiny. The SSHAC Level 3 update will re-examine parameters of the GMC and SSC in light of recent and ongoing studies with the objective of developing updated models that capture the center, body, and range (CBR) of the technically defensible interpretations (TDI).

Soil and Groundwater Remediation and Brownfields Redevelopment at Former Publishing Company Site

2026-05-25T13:31:37-06:00October 20th, 2009|Tags: |

The Former Daniels Publishing Site (Site) is located in an economically disadvantaged State Brownfield Area comprised primarily of industrial/commercial properties in Orlando, Orange County, Florida. The Site was used as a printing facility from the 1960s through approximately 1996, when printing operations were discontinued and the printing presses were removed. Following printing operations, the Site has also been used for general storage and is currently being used as a cabinet manufacturing facility.

Assessment of Vapor Intrusion Pathway at Residential and Commercial Structures near the Wells G&H Superfund Site

2026-04-02T15:50:27-06:00October 20th, 2009|Tags: |

The Wells G&H Superfund Site centers on two municipal water supply wells developed in the 1960s which were found to be contaminated by disposal activities from nearby commercial-industrial facilities. In the intervening decades, many remedial actions have been conducted to reduce or eliminate the exposure of local residential and commercial properties to contaminated groundwater.

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Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, energy, and civil infrastructure.

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