Technical Guidance Manual for Hydrogeologic Investigations and Ground Water Monitoring (TGM)

The TGM identifies technical considerations for performing hydrogeologic investigations and ground water monitoring at potential or known ground water pollution sources. The purpose of the guidance is to enhance consistency within the Agency and inform the regulated community of the Agency’s technical recommendations and the basis for them. In Ohio, the authority over pollution sources is shared among various Ohio EPA divisions, including the Emergency and Remedial Response (DERR), Hazardous Waste Management (DHWM), Solid and Infectious Waste (DSIWM), and Surface Water (DSW), as well as other state and local agencies.
This technical guidance is a series of documents and was originally published in 1995. These documents will be periodically updated and the most current versions can be downloaded from the list below. The current version will contain a summary of major changes. DDAGW will archive older documents and maintain their availability (See Archive in the below list).
 

• Chapter 1: Introduction (February 1995, See Archive)
• Chapter 2: Regulatory Overview (February 1995, See Archive)
• Chapter 3: Characterization of Site Hydrogeology (October 2006)
• Chapter 4: Pumping and Slug Tests (December 2006).
• Chapter 5: Monitoring Well Placement (November 2007)
• Chapter 6: Drilling and Subsurface Sampling (April 2007)
• Chapter 7: Monitoring Well Design and Installation (February 2008)
• Chapter 8: Monitoring Well Development (February 2004)
• Chapter 9: Sealing Abandoned Monitoring Wells and Boreholes (February 2005)
• Chapter 10: Ground Water Sampling (February 2006)
• Chapter 11: Soil Gas Monitoring For Site Characterization (August 2008)
• Chapter 12: Ground Water Quality Organization and Interpretation (February 1995)
• Chapter 13: Statistics for Ground Water Quality Comparison (February 1995)
• Chapter 14: Ground Water Modeling (November 2007)
• Chapter 15: Direct Push Technologies for Soil and Ground Water Sampling (Feb 2005)
• Chapter 16: Application of Geophysical Methods for Site Characterization (Aug 2008)
• Archived: 1995 TGM (Contains all 1995 chapters)

Note: Chapter 1 (Introduction) and Chapter 2 (Regulatory Authority) are no longer part of the TGM series of documents. Chapter 1 provided a list of authorities for various pollution sources. This information can be found in Ohio EPA’s fact sheet Getting to Know Ohio EPA. Chapter 2 provided a regulatory overview of Ohio EPA’s programs that may require ground water monitoring and/or hydrogeologic investigations. Information concerning Ohio EPA’s programs and rules can be found on Ohio EPA’s webpage.

Adobe Acrobat Reader is required to view these publications.