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Detroit Dam and Reservoir Minto Fish. Collection Facility Rebuild <br /> 3.1.7 Installations of Wye Branches <br /> Cutting into piping for connections shall not be done except in special <br /> approved cases. When the connecting pipe cannot be adequately supported on <br /> undisturbed earth or tamped backfill, the Dive shall be encased in ronrrete <br /> backfill or supported on a concrete cradle as directed. Concrete required <br /> because of conditions resulting from faulty construction methods or <br /> negligence by the Contractor shall be installed at no additional cost to <br /> the Government. The installation of wye branches in an existing sewer <br /> shall be made by a method which does not damage the integrity of the <br /> existing sewer. One acceptable method consists of removing one pipe <br /> section, breaking off the upper half of the bell of the next lower section <br /> and half of the running bell of wye section. After placing the new <br /> section, it shall be rotated so that the broken half of the bell will be at <br /> the bottom. The two joints shall then be made with joint packing and <br /> cement mortar. <br /> 3.1.8 Installation of Control Panel <br /> Installation of control panel shall comply with SECTIONS 26 05 00.00 25, <br /> BASIC ELECTRICAL MATERIALS AND METHODS and 26 05 19.00 25, INSULATED WIRE <br /> AND CABLE. <br /> 3.2 FIELD QUALITY CONTROL <br /> 3.2.1 Field Tests and Inspections <br /> The Contracting Officer will conduct field inspections and witness field <br /> tests specified in this section. Perform field tests and provide labor, <br /> equipment, and incidentals required for testing. Be able to produce <br /> evidence, when required, that each item of work has been constructed in <br /> accordance with the drawings and specifications. <br /> 3.2.2 Tests for Nonpressure Lines <br /> Check each straight run of pipeline for gross deficiencies by holding a <br /> light in a manhole; it shall show a practically full circle of light <br /> through the pipeline when viewed from the adjoining end of line. When <br /> pressure piping is used in a nonpressure line for nonpressure use, test <br /> this piping as specified for nonpressure pipe. <br /> 3.2.2.1 Leakage Tests <br /> Test lines for leakage by either infiltration tests or exfiltration tests, <br /> or by low-pressure air tests. Prior to testing for Leakage, backfill <br /> trench up to at least lower half of pipe. When necessary to prevent <br /> pipeline movement during testing, place additional backfill around pipe <br /> sufficient to prevent movement, but leaving joints uncovered to permit <br /> inspection. When leakage or pressure drop exceeds the allowable amount <br /> specified, make satisfactory correction and retest pipeline section in the <br /> same manner. Correct visible leaks regardless of leakage test results. <br /> a. Infiltration tests and exfiltration tests: Perform these tests for <br /> sewer lines made of the specified materials, not only concrete, in <br /> accordance with ASTM C 969. Make calculations in accordance with the <br /> Appendix to ASTM C 969. <br /> b. Low-pressure air tests: Perform tests as follows: <br /> 33 30 00.00 25-12 <br />