Scope of Work

The scope of work included site access coordination, field explorations, laboratory testing, and collaboration in reporting. CES performed geotechnical characterization of the sites, which included field resistivity testing, infiltration testing, and on-site pile load testing. Subsurface conditions were explored through drilling of 23 geotechnical borings and excavation of 15 test pits. Borings were drilled to depths of 5 to 25 feet, and test pits were excavated to depths of 2 to 9.5 feet, with shallow refusal on rock noted in some locations. 

Mud rotary and rock coring methods were used to complete the borings. Explorations were continuously monitored by qualified CES staff, who logged subsurface conditions, visually classified soils, and collected representative soil samples. Samples were collected using a standard split spoon sampler and SPT N-values were recorded in accordance with ASTM D1556. Laboratory testing included analysis of swell potential in upper site soils. 

Key Activities 

• Drilling and documentation of 23 geotechnical borings 

• Excavation and observation of 15 test pits 

• Field resistivity and infiltration testing 

• On-site pile load testing of driven foundation types 

• Laboratory analysis of soil samples, including swell potential characterization 

• Collaboration with project team on reporting and design recommendations 

Results 

Subsurface and laboratory data supported foundation design for the solar panel systems. Geotechnical findings were documented in project reports to be used by the design team.