Chapter I: Horizontal drilling The plan of construction of horizontal drilling technology (HDD) and drawing HDPE pipes applies to the following jobs: I. PRIMARY SURVEILLANCE, SOLUTION, AND CONSTRUCTION RATIO. I.1. Collection survey, calculation solution. The head private links with main permissions, get the table of the interface in the public; In the face of the expected construction, the company's supervising personnel conduct an accurate verification on the horizontal drilling construction location described in the profile design, welding power source, clean water combined with drilling fluid. , safe location to gather construction waste (residual sludge), the server will handle it according to the regulations on the environment, hygiene and safety,... Construction team, Mathematics surveying on the special ground, becoming owners (trees, houses, lines, underground cables, sewer pipes, embankments, ...), locating drilling machines, welding HDPE pipes combination, sta