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Long Beach Municipal Urban Stormwater Treatment <br />Port of Long Beach, CA <br />An ambitious, comprehensive, and innovative project <br />that will intercept dry weather runoff (excessive irrigation, <br />spills, construction sites, pool draining, car washing, and <br />paved area washing) and a percentage of the first -flush <br />storm flows generated within the City prior to discharging <br />to existing storm drain outfalls flowing into the Los Angeles <br />River. Long Beach is a highly -urbanized municipality and <br />the dry weather and stormwater runoff generated within the <br />City is collected through a complex system of underground <br />storm drains and then discharged. Water quality standards <br />associated with stormwater runoff are governed by the <br />requirements of the National Pollutant Discharge Elimination <br />System (NPDES) permit and regulated by the Los Angeles <br />Regional Water Quality Control Board. The new facility will <br />assist the City in complying with the permit requirements by <br />intercepting untreated flows that would normally discharge <br />directly to the Los Angeles River. The intercepted flows will <br />be conveyed to a centralized treatment facility. A portion <br />of the advanced treated water will be used for non -potable <br />irrigation of City parks and to create wetlands along the river <br />corridor. In addition to water quality improvement, the project <br />incorporates educational features of its benefits. <br />The facility is an untraditional solution to water quality <br />treatment, representing a creative and innovative regional <br />approach, which has the financial backing of Caltrans <br />and the San Gabriel and Lower Los Angeles Rivers and <br />Mountains Conservancy (RMC). This solution applies <br />multiple strategies to address many important and critical <br />watershed objectives/issues, including stormwater water <br />quality and water resource management. <br />By intercepting, diverting, and treating the dry weather <br />urban runoff and the first flush of rainwater runoff, the new <br />facility will reduce and/or eliminate pollution that would <br />otherwise discharge into the Los Angeles River and spread <br />into beaches and ocean waters. The facility's recycled water <br />byproduct will help create and sustain wetlands riparian <br />habitat and replace potable water for the irrigation of parks. <br />Key Elements <br />• Anew conveyance system: a new forced -main will convey <br />urban runoff from stormwater collection sumps to the <br />treatment facility with new pumps connected to the new <br />pipeline for flow diversion. <br />• A new advanced treatment facility using ceramic <br />ultrafiltration membranes for solids and metal removals, <br />manganese filters for polishing, and advanced oxidation <br />for organic compounds/disinfection. It will be LEED <br />(Silver) and ENVISION certified and provide reclaimed <br />water for nearby park irrigation. <br />• New wetlands to create both riparian habitats and <br />additional public park space for the community. Reclaimed <br />water from the treatment facility will be used to fill and <br />sustain the water level in the new wetlands. <br />Team Members <br />• Roger Chung, PE, CFM, QSD/P, F. ASCE—Stantec <br />• Ed Othmer, PE, CPESC, CPSWQ, QSP/D ToR, QISP <br />ToR, ENV SP, PMP—Stantec <br />• Steve Cook, RLA—Stantec <br />• Greg Sebourn, PLS—Stantec <br />Project Dates <br />2018-Ongoing <br />Reference <br />Lincoln Lo, PE, LEED AP, ENV-SP, QSD <br />Assistant City Engineer <br />Public Works, Engineering Bureau <br />411 W. Ocean Blvd, 5th Floor, Long Beach, CA 90802 <br />T. 562-570-6695 <br />E: lincoln.lo@longbeach.gov <br />Stantec • Proposal for On -Call Stormwater Project Design Services m <br />