Item 07 - Sewer System Management Plan 2025 Update

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CITY OF SANTA ANA APPENDIX I PROJECT NO.: XX-XXXX PROJECT TITLE The Contractor shall demonstrate that the pipe to be abandoned has been completely filled, without voids, by providing volume calculations for each placement of grout and materials strength tests as required by the City. The Contractor is responsible for the selection methods and material to be used. Pipe abandonment shall be coordinated with the construction sequence. Appropriate plugs shall be installed by the Contractor, and grout shall be injected in an upslope manner to remove trapped air. Samples of the outgoing water (at the exit end) shall be made until the existing grout mix is observed to be similar to the grout being injected at the inlet end. The grouting plan, and grout mix design shall be submitted to the Engineer for review and approval prior to commencement of work. 6.14 ABANDON EXISTING MANHOLE STRUCTURES The contractor shall abandon existing manhole structures in conformance to the Standard Specifications Section 306-5, as specified herein, and as shown on the construction plans and per City of Santa Ana Standard Plan No. 1209. The contractor shall provide traffic control as required and approved by the agency having jurisdiction. Under no circumstances shall the abandonment take place before existing sewers and manholes are out of service and all flow directed to the new or alternate pipes. The manhole wall shall be removed to 18-inches below finished surface and be completely removed and properly disposed of, unless otherwise shown. The manhole base shall be perforated or cored through and filled with sand (SE 30 minimum). The manhole rim and cover shall be salvaged and delivered to the City of Santa Ana Water Resources Division at 215 S. Center Street. Existing pipe ends within manholes to be abandoned shall be plugged with concrete and bricks per section 306-5. Concrete shall be Class C and bricks shall be a manhole brick as specified in Section 202-1 of the Standard Specifications. The contractor shall remove and replace all asphalt, concrete pavement, earthwork, landscaping, or other surface damaged by the abandonment operations per an in conformance with these provisions. 6.15 CONSTRUCT 4" OR 6" HIGH DENSITY POLYETHYLENE (HDPE) SEWER LATERALS AND CLEANOUTS (PIPE BURST) This work involves the installation of HDPE Pipe. Method of construction shall be via trenchless pipe replacement installations. The Contractor shall connect to the new sewer main and to the existing sewer lateral pipe at the property line. The existing sewer lateral shall be depicted on the construction plans based on the best information available. It is the Contractor's responsibility to "locate