Hydrogeologic Investigations

Hydrogeologic investigations are typically performed to determine groundwater quality and groundwater flow characteristics. They are required by state and local regulatory authorities in order to protect groundwater supplies.

Aquifer Protection. Hydrogeologic investigations are conducted by municipalities to define aquifer boundaries and to delineate Well Head Protection Areas. The investigation may be supplemented by numerical modeling techniques to define potential contaminant transport pathways and travel times. Many towns require hydrogeologic investigations if a development is proposed within an aquifer protection zone. Groundwater monitoring wells are installed as part of the investigation and they are typically sampled on a periodic basis.

Impact Studies. A developer or industry may be asked to conduct a hydrogeologic investigation prior to site development to determine the potential impacts the proposed site use may have on groundwater quality and quantity. For example, a multi-unit residential development to be serviced by an on-site septic leachfield and private wells would raise concerns over nitrate loading and drinking water quality. Exeter Environmental has extensive experience in these potential impact studies including nitrate loading studies using both analytic and numerical modeling techniques.

The State of New Hampshire is unique in issuing Groundwater Management Permits to monitor local groundwater quality conditions. Exeter Environmental has been successful in obtaining these permits. Permits may be required for monitoring large septic system discharges, industrial releases or ambient conditions surrounding gasoline/solvent sites.

Mr. Steven Shope, President of Exeter Environmental Associates, Inc., is a Maine Certified Geologist. A Certified Geologist is required for projects in Maine involving landfill sitings and closures, groundwater contamination projects, DEP oversight projects, and the gravel mining permit process.