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6.3.2 The Contractor shall submit a proposed plan for performing the Bent Strap Test, including a description of the equipment to be used, to the Engineer for approval. The Contractor must demonstrate the functionality of the test procedure using a sample of pipe of the same thickness as specified for the Project. 6.4 VISUAL JOINT INSPECTION 6.4.1 The Contractor shall provide adequate notice and opportunity to the Engineer for a visual inspection of all HDPE butt fusion welds, and all other pipe connections. If necessary for complete inspection, the Contractor shall provide equipment and/or manpower that may be required by the Engineer to perform the inspection. Any joints that are deemed unsatisfactory by the Engineer shall be removed and remade at the Contractor's expense. 6.4.2 The inspection criteria shall be ,based on the manufacturer's recommendations, as welt as the recommendations described in the specifications cited herein. 6.5 ULTRASONIC JOINT INSPECTION 6.5.1 The Contractor shall inspect all joints made by Time-of-Flight Diffraction ultrasonic test methods. The entire circumference of all joints made shall be tested. An electronic record, as well as a hard copy of the test results for all joints tested shall be provided to the Engineer at least daily or as requested, and at the end of pipeline construction. Any and all joints that are deemed unsatisfactory by the Engineer shall be removed and remade at the Contractor's expense. 6.6 SURFACE DAMAGE 6.6.1 The Contractor shall provide adequate notice and opportunity to the Engineer for a visual inspection of all HDPE pipe surfaces. If necessary for complete inspection, the Contractor shall provide equipment and/or manpower that may be required by the Engineer to perform the inspection. The depth of surface damage shall not exceed 10 percent of the minimum wall thickness of the pipe. Excessive damage will require the removal and replacement of the damaged sections. SPEC. C -PIPING PAGE 10