In these cases the procedure of the vibrocompressed gravel columns may be applicable. The system is also suitable for the improvement of coarse or fine or artificial landfills. The inert comes out at the tip of the tool: the ground remains sideways at all times and the column is continuous along its entire length. The re-flow of soils, even bad ones, is excluded inside the hole. The infixion takes place in a single continuous phase. The use of mast and battery slide-guide prevents deviations from the vertical. No water is used, therefore no mud or softening occurs.

Concrete vibrated compacted gravel columns (CGVC). Storm Drain Management equipment and executive aspects: These foundational elements are executed with the same dry technology, pneumatic winding vibro, as for the CGV. The cementation of the element takes place simultaneously with the installation of the gravel: either by injecting the cement mixture into the vibro.

Municipal Separate Storm Sewer System Permit better known as the MS4 Permit is the regulatory requirement that is under the provisions of the Virginia Stormwater Management Act. Under the MS4 Permit the Stormwater management checks that all sewer systems are in line with the proper discharge mechanism of all the flows from municipal separate storm sewer operations.

The MS4 Grant covers entities that are controlled or managed by a State, municipality, or township. The system is for handling or dispatching stormwater; that is not a connected gutter and is not a division of a publicly held operation activities.

The purpose of the permit is to enhance the stormwater goals. The administrators are monitoring the license work with each district to assist them in complying with the terms of these licenses, using a regional and watershed particular program, rules and procedures.