Environmental Laboratory Services, also known as ELS, is a laboratory that provides water and solid waste analysis services for industries, municipalities, and residences. It is staffed with chemists, biologists and environmental scientists. The company establishes temporary and permanent laboratories in industrial sites. In addition, Environmental Laboratory Services offers sampling and monitoring services. It is certified by the Commonwealth of Pennsylvania. The company also provides waste characterization and chemical and bacterial analysis services. It operates a sister firm, RAR Engineering Group, which offers environmental engineering services. Environmental Laboratory Services also work with landfills to secure approvals for the acceptance of waste from industrial and commercial sites.