A Remedial Construction Services, (RECON) employee or supervisor should use this test to determine possible degradation of polyethylene shells.
Compress the shell inward from the sides about 1 inch (2.5 cm) with both hands and then release the pressure without dropping the shell. The shell should quickly return to its original shape, exhibiting elasticity. Compare the elasticity of the sample with that of a new shell. If the sample does not exhibit elasticity similar to that of a new shell or if it cracks due to brittleness, it should be replaced immediately.