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Specialties

Site Investigation & Remediation

Groundwater Assessment & Remediation

Specialized In Situ Treatment Technology 

Subsurface Vapor Intrusion to Indoor Air

 

Environmental Management Assessment & Systems

Surface Water/ Groundwater Supply Studies & Development 


Education

M.S., Geological Sciences (Hydrogeology), San Diego State University

B.S., Geological Sciences (Geophysics), San Diego State University


Sam Williams, P.G.

Primary Disciplines:
Earth Sciences, Environmental Sciences, Hydrogeology,

Sam Williams, PG, principal hydrogeologist based in California, focuses on the characterization and remediation of soil and groundwater contamination at industrial and commercial properties. 

Practice Specialties
Most recently, Mr. Williams has used his 25 years of experience in site characterization and innovative remediation programs to work with clients on converting impacted properties into community assets as commercial developments through Brownfields site redevelopment programs. He has worked at numerous multi-party state and federal Superfund sites, RCRA facilities, Brownfields, and UST sites throughout Arizona, California, Hawaii, Nevada, Oregon, and Texas. Areas of specialization include remedial investigations/feasibility studies, Brownfields redevelopment, assessment/analysis of MTBE-impacted sites, risk assessments and risk-based corrective action, burn site characterization and remediation, and expert consultation in support of litigation.

Advancing the State-of-the-Practice 
Mr. Williams continues to advance the state-of-the-practice through his leadership within the San Diego County Department of Environmental Health, Site Assessment and Mitigation (SAM) Forum.  For more than a decade, he has served on the Steering Committee for the SAM Forum.  He has also chaired the Vapor Phase Migration Technical Work Group, developing guidance to evaluate potential risks to indoor receptors from the inhalation of vapors from residual subsurface contamination and co-chaired the Risk-Based Corrective Action Technical Work Group to implement ASTM RBCA standards for sites in San Diego County with residual subsurface contamination. 

Contact Mr. Williams at swilliams@geosyntec.com .

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Projects & Publications

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Projects
Publications
Sources of Groundwater Impacts at Landfills, Is it Landfill Gas or Leachate?
The First Successful Hawaii Voluntary Response Program Site, Former Dole Cannery, Home Depot Development – How Engineering Controls Facilitated Development of Contaminated Property
Green Power and Regulatory Compliance, The Oxymoron of the New Millennium?
Getting to Redevelopment: A Case Study of the Implementation of Engineering Controls versus Site Remediation
Vapor Control Issues and Considerations for Development of Brownfields Sites
Use of Innovative Technologies in Developing Brownfields Sites: Case Studies Involving Engineering Controls to Mitigate Vapor Intrusion
Landfills are Like Children… The Older They Get the Less They Cost to Manage: Economic Benefits of Performance-Based Criteria for Post-Closure Landfill Maintenance
Recipe for a Successful Brownfields Development on a Grossly Contaminated Property for a Big Box Retailer in Honolulu, Hawaii
Finding Your Way Through the Maze of Burn Site Regulations Don’t Let Your Solid Waste Funds Go Up in Smoke
Integration of Conventional and Innovative Technologies to Develop a Comprehensive Site Conceptual Model: Mission Valley Fuel Terminal, San Diego, California
San Diego County Site Assessment and Mitigation Manual Vapor Sampling and Risk Assessment Guidance Update
Source Characterization and Remediation of PCB-Impacted Sediment in an Industrial Storm Water System
PCB Forensics: Fingerprinting, Finger-Pointing, and a Case for Background Values