Rhode Island Underground UtilityRhode Island Underground Utility Books, Pre Printed Tabs, and Online Course Options The Rhode Island Underground Utility is required for all first time contractor license applicants in addition to taking the trade exam. This complete book package includes all of the required books for your Rhode Island Underground Utility Exam: OSHA 29 CFR Part 1926 (OSHA) Concrete Pipe and Box Culvert Installation, 2007 DIPRA Installation Guide for Ductile Iron Pipe,
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