Business Details
38 Years
experience
Professional Geotechnical Engineering Services in California
Since 1988, LOR Geotechnical Group has provided specialized geotechnical, geologic, and environmental consulting services to industrial, municipal, and private sector clients. Our team of licensed engineers and geologists employs proven investigation techniques combined with innovative problem-solving to address complex project challenges. We prioritize open communication with clients to develop tailored solutions that meet specific project needs while maintaining ethical standards and technical excellence. With decades of collective experience, our professionals deliver high-quality assessments, feasibility studies, and construction oversight across California's diverse geological landscape. Our commitment to integrity ensures clients receive reliable advice and transparent project execution.As an ESOP company, our employees' vested interest in our success translates to exceptional service quality and continuous professional development. We specialize in integrating site-specific conditions with client objectives to optimize foundation design, slope stability, and environmental compliance. Our technical expertise spans seismic hazard analysis, liquefaction evaluation, and underground storage tank investigations. We maintain industry-leading certifications for construction materials testing and laboratory analysis to support comprehensive project requirements. This dedication to excellence has established LOR as a trusted partner for geotechnical challenges throughout the Inland Empire region.
Services
Geotechnical Investigations
Liquefaction Evaluation
Environmental Site Assessments
Construction Testing
Slope Stability Analysis
Details
- Year established: 1988
Highlights and features
- We offer 40+ years of geotechnical expertise in southern California's unique geological conditions
- Our team combines proven investigation techniques with innovative problem-solving approaches
- We operate with full transparency and ethical accountability in all client engagements
- Our ESOP structure ensures employee commitment to project success and quality
- We maintain comprehensive certifications for construction materials testing and analysis
Associations and certifications
- Caltrans Certified
- ACI Certified
- ICC Reinforced Concrete Special Inspection
Services
Geotechnical Investigations
Our geotechnical investigations combine subsurface exploration with engineering analysis to assess soil properties and site conditions. We provide detailed reports for foundation design, slope stability, and construction planning. Our services help mitigate risks associated with soil behavior in diverse geological environments.
Environmental Site Assessments
We conduct comprehensive environmental assessments to identify potential contamination from hazardous materials. Our team performs soil and groundwater sampling to meet regulatory requirements for property transfers and development projects. We provide remediation guidance for sites with underground storage tanks and industrial contaminants.
Construction Testing
Our certified technicians perform field and laboratory testing of construction materials including concrete, asphalt, and soil compaction. We provide quality control services for infrastructure projects, ensuring compliance with Caltrans and ACI standards through specialized inspection methods and documentation.
Slope Stability Analysis
We assess geologic hazards related to slope stability and landslide risks. Our analysis incorporates subsurface data and seismic factors to develop mitigation strategies for residential, commercial, and infrastructure developments in geologically sensitive areas.
Liquefaction Evaluation
Our liquefaction assessments evaluate soil behavior during seismic events. We provide detailed analysis of soil characteristics and groundwater conditions to determine liquefaction potential and recommend foundation design modifications for improved seismic resilience.
People
John P. Leuer
President, Civil Engineer
With 40+ years of experience, John Leuer specializes in geotechnical engineering for commercial and industrial projects. He holds dual engineering licenses in California and Nevada, with expertise in foundation design and regulatory compliance.
Andrew A. Tardie
Vice President, Geologist
Andrew Tardie manages geotechnical projects with 20+ years of experience in seismic hazard analysis and subsurface investigations. He holds professional geology certifications and specializes in California's unique geological conditions.
Mathew L. Hunt
Environmental Scientist
Mathew Hunt has 16 years of environmental assessment experience, conducting over 200 Phase I ESA evaluations. He specializes in hazardous waste characterization and groundwater monitoring programs for contaminated sites.
Cristina Carranza
Staff Geologist
Cristina Carranza provides geological expertise for site investigations and environmental assessments. She contributes to subsurface mapping and regulatory compliance documentation for development projects.
Mark Switzer
Laboratory Manager
Mark Switzer oversees materials testing operations with expertise in concrete and asphalt analysis. He ensures laboratory compliance with industry standards for construction materials certification.
Questions
What geotechnical services do you offer?
We provide site investigations, foundation analysis, slope stability assessments, liquefaction evaluations, and construction materials testing for residential, commercial, and industrial projects.
Do you handle environmental assessments?
Yes, we conduct Phase I Environmental Site Assessments, groundwater monitoring, and underground storage tank investigations to meet regulatory requirements for property transfers.
Are your technicians certified?
Our team holds Caltrans, ACI, and ICC certifications for construction materials testing and special inspection services across multiple disciplines.
How do you handle seismic hazards?
We perform seismic hazard analysis including fault investigations, liquefaction potential assessments, and slope stability evaluations to mitigate earthquake-related risks.
Can you assist with regulatory compliance?
We help clients navigate environmental regulations through site assessments, remediation planning, and documentation for local and state agency approvals.
What areas do you serve?
We primarily serve the Inland Empire region with offices in Riverside, CA, handling projects throughout southern California's diverse geological environments.
