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| Carolina Precast Co. Manufacturer of concrete precast products for customers in North Carolina, South Carolina, Virginia and Tennessee. |   |
| Modern Concrete Manufacturers of precast concrete products for environmental, stormwater, building and construction applicaitons. |   | |
| Gagne Precast Maine based manufacturer of concrete blocks, catchbasins, curing compounds, caulkings, steel products, geotextile fabrics , manholes, waterproofers, septic tanks and grouts. |   | |
| Sunnycrest Based in New York. Manufacturer of precast concrete products including burial vaults, septic tanks, catch basins, utility and drainage structures, and well tile. |   | |
| ModuTank, Inc. Products are sold to multiple industries. Manufacturer of modular containment tanks for water and waste storage, reclamation and treatment and secondary containment. |   | |
| AK Industries Manufacturer of a variety of sewage products including fiberglass and polyethylene basins, accessories, basin covers and specialized custom products. |   | |
| Underground Specialties Inc. Based in Canada. Suppliers of sewer and water pipe and fittings, precast concrete products, septic tanks, sump pumps, and many other products related to the sewer and water distribution industry. |   | |
| GlobalSpec: Septic & Sewage Disposal Tanks Browse catalogs and contact suppliers. Engineering search engine for technical information on septic and sewage disposal tanks companies. |   | |
| Alpha Septic Industries Manufacturer of fiberglass wastewater products including septic tanks, lift stations, pump chambers and control panels. |   | |
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