Based on the scale drawing and the location of the main and zone pipes, install all the necessary pipe in the following way: When you're using the vibratory plow, start by digging a 2' trench where a sprinkler head will be located.

A bell hole is required by OSHA to repair any pipeline when the trench is deeper than 5 feet. The walls of the trench are benched away from the center-line of the trench. This measure is taken to prevent a cave-in -- a result of sliding, toppling, tension

In Upper Uwchlan Township, the route and installation method for the 16- and 20-inch diameter pipelines requested by Sunoco/Energy Transfer, to convert the installation method of both the 16-inch and 20-inch diameter pipelines from an HDD to an open trenc