Oklahoma

Mammoth Energy Services, Inc - Oklahoma City, Oklahoma

Premier Safety Resources: Pipeline Safety, Environmental, Safety, Quality Solutions - Cushing, Oklahoma

Cox Environmental - Tulsa, Oklahoma

Pinnacle Environmental Solutions - Ponca City, Oklahoma

CleanHarbors Environmental Services - Ponca City, Oklahoma

GreenShield Environmental, LLC - Tulsa, Oklahoma

Midway Environmental Services - Stroud, Oklahoma

Schroeder Environmental - Cushing, Oklahoma

Systech Environmental Corporation - Tulsa, Oklahoma

Mid America Environmental Solutions - Tulsa, Oklahoma