Business Details
Expert Environmental & Geotechnical Drilling Services in Dixon, CA
Geo-Ex Subsurface Exploration has been a trusted provider of environmental and geotechnical drilling services since our inception. Our team of trained professionals specializes in subsurface exploration, offering expertise in monitoring well installation, soil and rock coring, and advanced drilling techniques like cone penetration testing and sonic drilling. We maintain rigorous safety standards through our comprehensive Corporate Health and Safety Plan, ensuring compliance with all regulatory requirements. Our field personnel are OSHA-certified and undergo annual training to stay current with industry best practices.With a fleet of versatile drill rigs equipped for rotary wash, hollow stem auger, and direct push technologies, we deliver precise data collection and innovative solutions tailored to client needs. Our commitment to quality project management, cost-effective methodologies, and technical excellence has earned us a solid reputation in California's geotechnical and environmental sectors. We serve diverse industries including construction, infrastructure development, and environmental remediation, providing reliable subsurface data that informs critical engineering decisions.
Services
Cone Penetration Testing
Direct Push Technology
Hollow Stem Auger
Rock Coring
Rotary Wash Drilling
Sonic Drilling
Highlights and features
- 20+ years of combined experience in geotechnical drilling operations
- OSHA-certified field personnel with annual safety training
- Comprehensive Corporate Health and Safety Plan implementation
- Versatile drilling capabilities across multiple advanced technologies
- Proven track record with government contracts including USACE projects
Services
Cone Penetration Testing
Our Cone Penetration Testing services utilize track and truck-mounted rigs with up to 30 tons of pushing capacity for deep foundation analysis. We employ seismic cones to measure shear wave velocity values while simultaneously collecting soil samples and installing monitoring wells. This method provides continuous soil profiling data that informs critical engineering decisions for infrastructure projects.
Direct Push Technology
Direct Push Technology services combine powerful hammer systems with truck and track-mounted platforms for efficient geotechnical and environmental investigations. We utilize dual tube systems for discreet sampling, water sampling, and pressure grouting applications. This method minimizes site disturbance while maintaining sample integrity in challenging subsurface conditions.
Rock Coring
Our rock coring services employ wireline and conventional systems (NQ, HQ, PQ sizes) for landslide investigations, dam assessments, and confirmation coring. We utilize triple tube systems for continuous core retrieval and standard pitcher barrel methods for discrete sampling. This capability supports structural analysis and geological mapping in complex formations.
Rotary Wash Drilling
Rotary wash drilling services feature rapid system conversion between auger and wash drilling modes. Our approach minimizes hole diameter to reduce water consumption and waste generation. We provide casing advance systems with wireline retrieval capabilities for SPT testing and Shelby tube sampling in challenging subsurface environments.
Sonic Drilling
Sonic drilling services utilize track-mounted equipment with SDT systems that vibrate both inner and outer tubes simultaneously. This method enables continuous sampling through difficult overburden materials while maintaining borehole stability. We employ auto hammer systems for SPT sampling and rock coring when encountering bedrock formations.
People
Tom Scott
President
With over 20 years of experience, Tom Scott manages drilling operations and project execution. He oversees USACE IDIQ contracts and maintains direct involvement in field operations to ensure quality control.
Paul Britton
Operations Manager
Paul Britton coordinates field operations and equipment deployment. His expertise ensures efficient execution of geotechnical drilling projects across diverse site conditions.
Nelly Scott
Office Administrator
Nelly Scott manages administrative operations and client communications, ensuring smooth coordination between field teams and project stakeholders.
Questions
What drilling methods do you specialize in?
We specialize in Cone Penetration Testing (CPT), Direct Push Technology (DPT), Hollow Stem Auger, Rock Coring, Rotary Wash Drilling, and Sonic Drilling methods.
Do you serve areas outside California?
While based in California, we've completed projects across the state including Sacramento, Stockton, and Red Bluff locations.
What safety certifications do your crews hold?
All field personnel maintain current OSHA 40-hour certifications with annual 8-hour refresher training and up-to-date physical examinations.
Can you handle complex geotechnical projects?
Yes, we've completed challenging projects for USACE including multi-year drilling contracts with sonic, rotary, and concrete coring methods.
What equipment do you use for deep foundation testing?
Our largest CPT rig provides 30 tons of pushing capacity for deep foundation analysis with seismic cone capabilities.
How do you ensure sample integrity during drilling?
We employ specialized sampling systems including Shelby tubes, piston samplers, and triple tube coring methods to maintain sample quality.
