Chapter 5: Sanitary Sewer Collection Systems 142 B. Plan View 1. The Applicant shall provide plan views at 1:30 scale (1-inch to 30-feet). Other scales are only permitted with written permission from the Development Manager or designee. 2. The Applicant shall provide sanitary sewer designs in context with site grading, right- of-way limits, other utilities (including dry utilities), structures, buildings, walls, light poles, traffic controls, sidewalks, trails, walkways, concrete pads, and fences. 3. The Applicant shall place sanitary sewer main design information in eitherthe grading and/or utility plan sheets. 4. Show and correctly identify all existing sanitary sewer mains, manholes, laterals, cleanouts, force mains, valves, flushing stations, air releases, sewage pumping stations, energy dissipation structures, and private potable wells within 100 feetof the project limits or plan sheet limits, whichever is greater. Existing sewer mains shall be identified with the pipe size, direction of flow, and material, example: 8” PVC SS. Information for existing sewer mains can be obtained from Prince William Water utility records or from a Prince William Water utility map obtained by request through its website. 5. Show all proposed and existing sanitary sewer mains and manholes withthe designated line type and symbol per Table 5-5. Table 5-5: Sanitary Sewer Main and Manhole Line Type and Symbol 6. Show and label existing and proposed sanitary sewer main segments with the pipe size, material, and direction of flow. All private sanitary sewer lines are to be labeled, “Private,” in the plan view. 7. Show casing pipes graphically in the plan view and label casing’s length, material, and diameter. If the casing is to be installed via a jack and bore or other trenchless method, show the limits of the launch pit and the receiving pit necessary to execute the design. 8. Place hatch layer, x – x – x – x, over the sanitary sewer mains that are to be removed and hatch layer, //-//-//-//-//, over the sanitary sewer mains that are to be abandoned in place. Show and specify caps at the end of the abandoned sanitary sewer mains to be left in place. 9. Show and label all existing and proposed sanitary sewer manholes. All proposed manholes are identified with a unique identifier that can be matched to the profile. Existing manholes are to be identified with Prince William Water’s assigned manhole number, which consists of Prince William Water’s utility map number and Prince William Water unique identifier for the manhole (e.g., 190-001) Manhole
