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Question 1 of 3
1. Question
An underground pipe buried in northern Alabama should be buried at least _____ deep in order to prevent from damage.
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Question 2 of 3
2. Question
Consider the installation of underground piping. In trenches cut through rock, tamped backfill shall be used for at last 2 feet _____.
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Question 3 of 3
3. Question
What is the manufacturing standard for polyethylene encasement for ductile iron pipe systems used for underground piping?
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