1.   We need to have safe access to each sounding site with our 4X4 vehicle (otherwise in acceptable weather we can do remote soundings which are an additional cost).

2.   The area to be tested generally needs to be a minimum of 50 feet away from any type of electrical power source (primarily underground power, underground pipe lines, and some buildings).

3.   We need to have enough unobstructed surface sediment (topsoil) to drive (install) four 3 foot 3 inch long 3/4 inch diameter electrodes into the ground. The electrodes are placed in a straight line and require an area that is approximately 16 feet long and 2 feet wide to complete each sounding. (The National Groundwater Surveyors® definition of unobstructed surface sediments is surface sediments that contain approximately 30% or less large gravel or cobbles. If the surface sediments contain more than 30% large gravel or cobbles then more soundings may be required to collect a sufficient amount of definitive information.)