Well and aquifer testing

GEO conducted a project for a client who operates and maintains 14 locations with relief wells in Ohio, West Virginia, and eastern Kentucky. GEO reviewed historical data to ascertain the hydrogeology, relief well construction, and initial or expected well capacities of each site, before performing downhole video analysis of 146 wells at the 14 sites. Chemical and biological sample collection and analyses was done to document chemical and microbiological conditions within representative wells chosen at each site. These representative wells were then pump-tested to ascertain initial well and aquifer capacities (generally six hour step-drawdown tests though one site required a 48 hour constant rate test). GEO analyzed pumping test data to determine aquifer and well parameters including well efficiency. BCHT™ rehabilitation was performed on three of the relief well fields, which were retested to determine their improvement in efficiency. GEO performed all field work within a four month window from August to December, 2009 before developing a Maintenance Plan for all 14 sites (plus 3 sites from a previous study).