Dodson Septic Services, LLC expertly conducts perc tests in order to properly install a septic system on properties in Harpers Ferry, WV, and the surrounding region. The type of soil that makes up a property is one of the most important factors when designing or replacing a septic system. The amount of soil on a property is also important. Some will overlook these two variables. A perc test, which is also known as a soil test, helps determine several things about a property, including: