T. Slack Environmental Services uses helical piers on projects when the contamination comes too close to a building or has made its way underneath a building. Helical Piers can be used on outside walls, inside buildings, chimneys, and stairs to provide a safe working condition and protecting the structural integrity of the building. On all of our jobs we offer a $5,000,000 pollution and liability insurance for our clients. We pride ourselves on being today’s solution to yesterday’s pollution.