If stone larger than one inch is present or bedrock is encountered, the trench shall be excavated to a depth at least how many inches below the grade elevation?

Study for the Wisconsin Plumbing Test. Utilize flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

If stone larger than one inch is present or bedrock is encountered, the trench shall be excavated to a depth at least how many inches below the grade elevation?

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