A-1 Environmental Septic Tank Service Inc. specializes in septic tank and sewer installation, maintenance and repair services. For more than 30 years, the company has been installing sump pumps, pump wells and water lines. It also specializes in gas line certification as well as plumbing repair. Located in Mount Olive, Ala., the firm caters to residential as well as commercial markets. Additionally, A-1 Environmental Septic Tank Service Inc. installs mound, modified mound and drip irrigation systems.