19 High density polyethylene, geosynthetic products for use in infrastructure, mining, forestry, agricultural and municipal applications and residential, industrial and commercial building and construction, namely, elbows, tees for use in association with fittings/pipes, beveled ends for use in association with fittings/pipes, end sections for use in association with fittings/pipes, headwalls for use in association with fittings/pipes and anchor blocks for use in association with fittings/pipes; high density polyethylene risers and high density polyethylene transitional rings, both for septic tank applications, namely, to create above-ground access to buried septic tanks; high density polyethylene pipe for drainage purposes; high density polyethylene tubing for drainage purposes; high density polyethylene membrane for foundation protection and floor underlayment; steel and polyethylene spiral rib pipe; and geosynthetic products used for soil stabilization and soil architecture, namely, geotextiles, geogrids, geocells and erosion control blankets; corrugated non-metal structural plate mini-bridge spans; non-metal storm water detention systems, comprising a corrugated steel pipe and high density corrugated polyethylene pipe system for water storage