Consulting Engineering Services Inflow And Infiltration (I/I) Reduction Study & Plan

REQUEST FOR QUALIFICATIONS: CONSULTING ENGINEERING SERVICES INFLOW AND INFILTRATION (I/I) REDUCTION STUDY & PLAN WARRENTON, OR Qualifications due: January 11, 2017 @ 3:00 pm I. Project Background The City of Warrenton is soliciting the services of a licensed Professional Engineer or Firm, in the State of Oregon, and supporting disciplines to perform civil engineering and economic analysis to produce an Inflow and Infiltration (I/I) Study & Plan. The City of Warrenton operates a Waste water Treatment Plant located in Warrenton, Oregon. Wastewater is treated and discharged to the Columbia River in accordance with the NPDES Permit Number 100874. The City processes domestic sewage from a municipal and commercial population of 8000 EDU’s. The City’s SBR Treatment Plant became operational in June 2006. Warrenton’s WWTP is designated a minor domestic wastewater discharger under NPDES rules. Although the average daily flow is above 1 MGD the plant remains a minor domestic discharger and does not have to perform whole effluent toxicology (WET) analysis that is required of a major domestic discharger. The WWTP also operates a septage hauler dump station that is open to private haulers to dispose of septic waste. The collection system includes over 600 manholes, 16 miles of service lines, 18 miles of lateral lines, and 17 miles of trunk lines, which feed 36 pump stations and 19 miles of force mains. Most of the City’s pump stations are equipped with MISSION and may be remotely monitored. The City recently was connected to Shoreline Waste Water District, which includes pump stations force mains and conveyance piping outside the City limits. Other significant contributors to the City’s flow and loading come from privately owned facilities including Fort Stevens State Park and several RV parks. In 2016 the City was approached by Pacific Seafood’s Group, a seafood processor, requesting information to connect to Warrenton’s POTW and the City continues to work on an agreement with Pacific Seafood’s Group. In April of 2015 the Oregon Department of Environmental Quality (DEQ) requested the City conduct an in-depth I/I study to provide analysis on the condition and capacity of the collections system. An EPA document was referenced by DEQ: https://fortress. wa.gov/ecy/publications/publications/9703.pdf. An IFA General Application was submitted to fund the I/I study and the agreement with IFA was executed in June of 2016. Recent flow data indicates as much as 50% I/I from the collections system. The City of Warrenton is now seeking Professional Engineering Services to perform an I/I study and plan to eliminate extraneous flow for all portions of the collection system. The study will include evaluating all contributors to the collections system and to perform other related tasks and analysis necessary to complete the goals of the study. The selected consultant will review previous studies, documents and data as well as gathering new data as appropriate. Published Dec. 16, 2016. BT15875467

ad: 15875467

Publication: Construction

Section: Bids

Start Date: 12/16/2016

End Date: 12/16/2016

Owner: City of Warrenton