DOUBLE WALLED UNDERGROUND STORAGE CONTAINERS FOR FLUIDS SUCH AS HEATING OILS WHICH ENDANGER THE GROUND WATER AND A METHOD FOR THEIR MANUFACTURE

摘要

ABSTRACT OF DISCLOSURE:-Underground storage tank for fluids which has aninner and an outer wall of thermosetting reinforcedplastics material and a leak monitoring space betweenthese walls, said space comprising a continuous air andliquid permeable synthetic concrete mixture of a thermo-setting resin and compression resistant filling materialhaving no small components, the concrete forming the staticload bearing layer of the tank, the dosing of the syntheticresin being such that a sufficient wetting of the surfacesof the filling material particles is achieved for thebonding of the filling material particles with oneI.another whilst securing the continuous leak monitoringspace, and the synthetic resin concrete layer beingfirmly bonded to the thermosetting plastic of the innerwall and the outer so as to form a homogeneous unit.II.