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Maine Association of Site Evaluators (MASE)

MASE is a professional association of licensed site evaluators in the State of Maine. Site evaluators are licensed by the state to investigate soils, topography, drainage, and other site conditions and features in order to determine the site’s suitability for subsurface wastewater disposal, and to recommend and design appropriate subsurface disposal systems in compliance with current technology and state rules. All non-engineered onsite subsurface disposal systems installed in Maine must be designed by a licensed site evaluator.

Infiltrator Systems, Inc.

Infiltrator Systems Inc is the world’s leading manufacturer of plastic leachfield drainage chambers for environmental onsite wastewater solutions. Infiltrator System’s chambers, a direct replacement for stone and pipe leachfields, have revolutionized the septic industry. They provide cost-effective, efficient methods for handling residential and commercial wastewater.

Presby Environmental, Inc.

Presby Environmental Inc, founded in 1995 by inventor and entrepreneur David Presby, is an innovative environmental organization that engineers new technology to change the way the world approaches wastewater treatment. Today the company is working at the cutting edge of water pollution control to help protect and preserve our most precious natural resources.

Eljen Corporation

Eljen Corporation created the world’s first prefabricated drainage system for foundation drainage and erosion control applications. In the mid-1980s, Eljen introduced the Geotextile Sand Filter products for the passive advanced treatment of onsite wastewater in both residential and commercial applications. Today, Eljen is a global leader in providing innovative products and solutions for protecting our environment and public health.

American Concrete Industries

American Concrete Industries was formed in 1957 under the name of Maine Shawnee Step Company, Inc. by the Snowe brothers, Carleton, Richard & John. In 1967 the company expanded from Auburn to Veazie, Maine and the corporate name was changed to its present name, American Concrete Industries. Since 1957 American has been producing high quality pre-cast concrete products.  The company first started producing concrete steps and later moved into manufacturing burial vaults, septic tanks and commercial products.  American Concrete now delivers pre-cast concrete products throughout Maine and northern New England.

Ten Tips for Maintaining Your Septic System

(Publication of the Subsurface Wastewater Unit from

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