HYDROGEOLOGIC ASSESSMENTS

ART personnel have conducted numerous hydrogeologic assessments to facilitate development of conceptual models of groundwater flow systems. And to provide the following scope of services:

• Comprehensive review of published local and regional information to develop a conceptual model for the site, including estimated depth to groundwater, groundwater flow direction and gradient, nearby surface water features, local groundwater use such as nearby pumping wells, recharge areas, and target geologic formation(s)
   
• Installation of piezometers, groundwater monitoring wells, and multiple well casings in a single borehole to evaluate vertical gradients within a complex saturated flow system
   
• Tracer studies to evaluate horizontal and vertical flow in aquifer systems, and to evaluate potential interaction of surface water and groundwater
   
• Groundwater sampling programs including low flow methods such as peristaltic and bladder pump
   
• Aquifer testing programs such as slug and constant-rate tests to estimate aquifer properties such as hydraulic conductivity, storativity, seepage velocity, and contaminant migration rate.