Treatment of materials, namely, of geotextile, natural and synthetic materials in the nature of fabric, tarps, fleece, geo-membranes, mat of fibres, composites of plastic fibres, sand, concrete, wood and metal used in safeguarding of land and property from erosion and destruction by weather, storms, water, flooding, surf and wind; all of the aforesaid services for coastal protection in the nature of safeguarding of land and property close to the coast by means of structural constructional mea...