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Teri Higgins June 30, 2016 Page 12 buoyant with specially designed double depth bells to limit pull out. HDPE, PVC, reinforced concrete, steel pipe, or ductile iron is required. d.Sewers in Moderate Probability Liquefiable Areas (5 ‐ 15% probability and PGDs greater than 4 inches. These same areas are subject to landslides with a 15 – 30% probability of occurrence and with PGDs greater than 4 inches and potentially exceeding 100 inches. These areas are found in the hills in southern Eugene. These pipelines are typically 12‐ inches diameter or less serving small areas. Use continuous pipe such as HDPE, steel with welded joints, molecularly oriented PVC with restrained joints, or restrained ductile iron pipe. To maintain longitudinal continuity, design the pipe to pass through manholes. e.Pressure Sewers in Non‐liquefiable areas. Use continuous pipe or segmented pipe with elastomeric gaskets. f.Pressure Sewers in Low Probability Liquefiable areas (0 – 5% probability and PGDs of 4‐ inches or less). These areas are found along the Willamette River. Use continuous pipe such as HDPE, steel with welded joints, molecularly oriented PVC with restrained joints, or restrained ductile iron pipe. g.Pressure Sewers in Moderate Probability Liquefiable areas (5 – 15% probability and PGDs exceeding 4‐inches and potentially exceeding 100 inches). These areas are found in the hills in southern Eugene. Use continuous pipe such as HDPE, steel with welded joints, molecularly oriented PVC with restrained joints, or restrained ductile iron pipe, all with the ability to accommodate 1‐percent strain. h.Repair Materials – Evaluate repair materials required for critical large diameter sewers. Acquire and stockpile materials accordingly. 4.Existing Pump Stations a.Emergency Overflows ‐ Provide emergency overflows for all pump stations to protect public health. Design overflows so that sewage will not backup into buildings or overflow into City streets. b.Emergency Power ‐ Provide capability for emergency power for all pump stations. It is likely that the regional power system will be inoperable so even pump stations with two feeds would be inoperable. Each pump station should have a built in emergency generator or a quick connect for an emergency generator. Develop an emergency generator plan to address the generators owned, generator rotation, and generator refueling. c.Cabinet Anchorage ‐ Inspect all electrical and control cabinets in all pump stations to assure they are anchored to the floor, wall or ceiling above. Anchor those found to be deficient. 2020 Eugene Wastewater Master Plan Appendix A-12