- Our Projects
1620 Sansom Street
Project Overview
GeoStructures provided site inspection and oversight during demolition of the pre-existing parking garage at 1620 Sansom Street. To characterize the subsurface, 6 test borings were performed across the site. Geotechnical laboratory testing was then performed on the soil samples to determine the engineering properties of the load bearing materials for project analysis and design.
A 6-ft thick mat foundation covering the entire footprint was selected as the optimum foundation system. Adjacent structures (including the historic Liberti Church) thus required underpinning since their basements are located at a higher elevation than the mat bottom. GeoStructures was responsible for this design.
GeoStructures also performed soil clean fill testing, finding that select material is suitable as backfill for the basement wall, provided the moisture is at near optimum conditions at the time of the backfill operation. During a Phase II ESA, GeoStructures selected soil and groundwater samples to check contamination related to the historical use of the site as a filling station. Samples were subjected to laboratory analytical testing for PA short list of petroleum products including volatile organic carbons (VOCs), semi-volatile organic carbons (SVOCs), and priority pollutant metals. All of the tested constituents (with the exception of localized arsenic) were found to have concentrations lower than their respective PADEP Concentration Limits for Regulated Substances in Soils and Groundwater.
Lastly, GeoStructures also installed two geophones in adjacent structures to monitor construction vibration activity for the duration of the project.
- Related Services
Our Comprehensive Project Workflow: Step-by-Step Guide
Initial Consultation and Client Needs Assessment
Our team responds promptly to your inquiries, ensuring timely communication and immediate attention to your project needs. We work closely with clients to understand all project requirements, ensuring that we capture every detail and objective from the start.
Development of Work Plan
Our expert project managers extend innovative problem-solving to project planning, resulting in technically-sound, cost-effective work plans to better serve our clients.
Project Proposal and Agreement
We provide a detailed project proposal outlining the scope of work, fee schedule, and agreement terms. The project begins once the proposal is approved.
Execution and Quality Assurance
Our highly skilled team of principals, project managers, engineers, and field staff execute the project with precision, maintaining open communication to ensure alignment with client expectations. Each project undergoes a rigorous quality check by our team of licensed professional engineers, ensuring all deliverables meet our high standards of excellence.
Project Delivery and Invoicing
Upon completion, we deliver the final project and issue an invoice for the completed work, ensuring full transparency and satisfaction.
