Phase I - Mobilization, staging, and excavation Phase 11- Repair- replacement of approximately 30' of 4" sewer piping from building cleanout to the main line. Replacement will consist of 4" PVC pipe. Phase Ill-Restoration- fill, compaction, asphalt paving/sealing/painting, demobilization Theintent is to repair the collapsing sewer lateral to prevent future blockages. Traditional excavation will be the primary and preferred method of the repairs due to the extent of the piping that requires replacement. The work will consist of tying the replacement line into the existing lateral and complete replacement to the main. All connections need to be completely sealed to prevent see page and infiltration into the sewer system. Total excavation is approximately 13.5 cubic yards (to include asphalt, gravel subbase, and soil fill). Asphalt should be cut prior to excavation to mitigate structure damage. Current site conditions: Asphalt is approximately 2" in thickness with another B" of compacted aggregate under the asphalt as the primary subbase. Fill dirt is the anticipated final subbase. Estimating that the sewer lateral is approximately 4' depth. Parking curbs will need to be removed and then reinstalled. Once the pipe replacement is completed, back fill with compacted fill dirt, compacted gravel, and then asphalt (matching existing conditions. Fill back to existing with 8" compacted aggregate and 2" asphalt and then resealing the area. Other utilities need to be marked and labeled prior to excavation.
