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Ms. Zemo’s extensive professional experience as a practicing consultant includes management or technical/strategic direction of hundreds of site investigation and remediation projects. Constituents of concern include chlorinated solvents, petroleum hydrocarbons (crude oil, refined products, and residuals), fuel oxygenates (MTBE, TBA etc.), tars, and metals in soil and groundwater. Types of facilities include rail yards, refineries, pipelines, bulk storage facilities (petroleum and chlorinated solvent), retail service stations, manufacturing facilities, dry cleaners, and manufactured gas plants.

Ms. Zemo was among the first in the consulting community to integrate risk-based decision-making into project strategy. She has been an industry leader in developing and implementing innovative screening methods for cost-effective site characterization. Ms. Zemo continues to advance the state-of-the-practice by developing improved sample handling techniques for groundwater samples. From 1997 to 1999, she managed Geomatrix’s Bay Area environmental practice group.  In 2004, Ms. Zemo was an invited member of the National Water Research Institute’s working group on “Subsurface Monitoring Strategies for Fuel Hydrocarbons and Oxygenates”. From 2009 into 2012, Ms. Zemo served in the editorial group, contributed original content to several chapters and was the primary author of three chapters for the California  State Water Resources Control Board's (SWRCB) LUFT Manual revision.  She also served on the California SWRCB's UST Program Task Force in 2009 and 2010 and was on the technical expert team that supported development of the SWRCB's Low Threat Closure Policy in 2011 to 2012.

Ms. Zemo is a nationally recognized expert and published author in the areas of petroleum fate and analysis, site characterization, groundwater monitoring, and the use of environmental forensic chemistry (“fingerprinting”) for regulatory or litigation application to hydrocarbon projects. She is a frequent speaker at national and local technical workshops on these subjects for attorneys, regulators, industry, and consultants.

Ms. Zemo is a valuable addition to a technical or legal team because of her 1) chemistry and hydrogeology expertise, 2) years of practical experience collecting and evaluating data at hundreds of “typical” sites, and 3) ability to effectively communicate technical issues to non-specialized audiences.  She has served on the editorial review boards and peer reviewer teams for the international journals Ground Water Monitoring & Remediation and Environmental Forensics.  Ms. Zemo has been an expert for the California State Board for Geologists, assisting the Board in their prosecution of licensee enforcement matters.

Ms. Zemo’s current practice includes litigation support. She has been engaged on numerous occasions as a testifying expert witness or a confidential litigation consultant for matters focused on the timing and magnitude of releases, forensic chemistry of product composition, interpretation of analytical data (including “TPH”), site-specific vs. regional sources of chemicals, fate and transport of groundwater plumes, and appropriateness of remedial solutions. Through these engagements, Ms. Zemo has been deposed, prepared declarations and expert opinion reports, and testified in binding arbitrations and jury trials.

Vanderbilt University, Nashville, Tennessee: M.S., Geology, 1982
Stephens College, Columbia, Missouri: B.A., Geology, 1980

California Certified Engineering Geologist, No. 1747
California Professional Geologist, No. 4824

Zemo & Associates, Inc., Principal Hydrogeologist, Incline Village, NV, 2002 to present
Geomatrix Consultants, Inc., Principal Hydrogeologist, Oakland, CA, 1989 - 2002
Ecology & Environment, Inc., Senior Geologist, San Francisco, CA, 1988-1989
Amoco Production Company, Senior Geologist, Houston, TX, 1981-1988
Hanna Mining Company, Well-Site Geologist, Parsons, KS, 1980
U.S. Bureau of Land Management, Field Geologist, Billings, MT, 1978-1979

International Society of Environmental Forensics (ISEF)
Association of Environmental Health and Sciences; Scientific Advisory Board member (AEHS)
California Groundwater Resources Association (GRA)
National Ground Water Association (NGWA/AGWSE)
Editorial Review Board, Environmental Forensics
Peer Reviewer Team, Ground Water Monitoring & Remediation