Pesticides expert witness Allan Snyder; ACGIH, AIHA, SPCI writes on treatment and control of termites:
Treatment and control techniques vary depending on the species causing an infestation.
Multiple colonies of the same species of termite or more than one species of termite can infest a building.
Subterranean, and less frequently, dampwood termites can have nests at or near ground level, so control methods for these can be similar.
Drywood termites nest above ground and require different treatment methods than dampwood and subterranean termites.
Control methods include:
Excluding termites from the building by physical and chemical means.
Using mechanical and chemical methods to destroy existing colonies.