Repair and reconstruction of existing conduits and pipelines, such as sewer pipes, water mains and industrial pipelines by installing a liner within the existing conduit; lining the interior of pipelines for others by spraying on a fluid impervious epoxy-based barrier for protection from abrasion and corrosion; applying protective coatings to pipes; repairing pipes by coating with an epoxy; pipeline and cathodic protection installation and repair; laying and construction of pipelines and cathodic protection systems; construction and repair of cathodic protection systems for steel-reinforced structures