1. Before laying HDPE geomembrane, the corresponding qualified acceptance certificate of civil engineering shall be obtained.
2. Before cutting the HDPE film, the relevant size should be accurately measured, and then cut according to the actual size. Generally, it is not suitable to cut according to the size shown in the figure. It should be numbered piece by piece and recorded in detail on the special form.

The standard name of the impermeable membrane is Hdpe polyethylene geomembrane, which is mainly made of milky white translucent to opaque thermoplastic resin material, poly Zene resin.

1. The operator of the welder shall indicate the welder and his/her name and welding time beside the welded specimen and welding seam.
2. The project manager or construction team leader shall make the construction log during the construction process.