Nitrogen oxides (NOx) and particulate matter (PM) are undeniable contributors to the formation of ground-level ozone and the presence of harmful airborne pollutants.
In past columns we have discussed the use of horizontal directional drilling (HDD) for remediation well installations, soil sampling using HDD, and HDD drilling fluids and containment. In this article, we look at another of the unique aspects of the technology — locating and navigation.