Description Through its subsidiaries, Transtech Industries supervises and performs landfill monitoring, closure and post-closure procedures, and it oversees methane gas recovery operations. The company also generates electricity from methane gas produced at a company-owned landfill site; this business accounts for all of Transtech's revenue from external customers. Transtech's environmental services unit is engaged in closure and remediation of landfill sites formerly operated by other Transtech units. Transtech previously has provided environmental services for third parties, and the company hopes to do so again. Members of the family of former company executive Marvin Mahan are the largest shareholders of Transtech.