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Table 7. Estimated Replacement Value of Regional Wastewater System <br /> lst'Mated <br /> Roplacement <br /> Facility -Quantity itaitte($im)#lorts) <br /> Pipelines 600 miles 3,000 <br /> Joint Interceptor 10 miles 400 <br /> Lift Stations 60 300 <br /> Meter Stations 200 100 <br /> Metropolitan Plant 1 1,200 <br /> Regional Plants 7 1,000 <br /> Total System 6,000 <br /> Environmental Sustainability <br /> Sustainability of the regional wastewater system includes: (1) water sustainability; (2) energy <br /> conservation and generation; (3) air emissions reduction; and (4) solid waste reuse and <br /> reduction. <br /> Water Sustainability. The Council has two interrelated objectives: (1) sustaining the region's <br /> water resources to provide water supply and water quality that supports the region's economic <br /> growth and quality of life; and (2) investing the region's financial and technical resources to <br /> maximize benefits. Water supply, stormwater treatment and reuse, and wastewater treatment <br /> and reuse should be part of an integrated system that is optimized to meet these regional <br /> objectives. <br /> Wastewater reuse has the potential to meet part of the region's water supply needs. Investing <br /> strategically to further the region's nonpoint source pollution prevention and control program's <br /> effectiveness also may have more benefits than investing to meet more stringent wastewater <br /> discharge limits. <br /> The Council's program for mitigating infiltration and inflow in public and private wastewater <br /> collection systems also contributes to water sustainability by avoiding water quality risks, and <br /> limiting the amount of clear water entering the system, which is then lost to the region when <br /> treated and discharged to rivers. Reducing infiltration and inflow also recovers system capacity, <br /> which improves efficiency. <br /> Solid Waste.The wastewater system plan continues to support the use of wastewater <br /> treatment biosolids for energy generation for in-plant uses. The Metropolitan Plant uses thermal <br /> processing that reduces the biosolids to a small volume of inert ash, while recovering energy <br /> that is converted to electricity and steam for in-plant uses. The beneficial use of ash for its value <br /> as a phosphorus fertilizer is also being pursued. The Blue Lake and Empire plants use <br /> 41 <br />