Notice of Meeting

SEWAGE AND WASTEWATER ADVISORY COMMITTEE Clark County Water Reclamation District 5857 E Flamingo Rd, Las Vegas, Nevada 89122 Advisory to the Board of Clark County Commissioners Meeting Minutes of August 26, 2020 MEMBERS Present Absent Clark County (2 Members) John Solvie (Member) X Ebrahim Juma (Member) X Joseph Leedy (Alternate) X Sara Gedo (Alternate) X City of Las Vegas (3 Members) Mark Dunbar (Member) X John Bettencourt (Member) X Brian Oswalt (Member) X Charles Trushel (Alternate) X Dan Combs (Alternate) X VACANT (Alternate) City of Henderson (2 Members) Adrian Edwards (Member) X Howard Analla (Member) VICE-CHAIR X Kyle Okamura (Alternate) X Lance Lomprey (Alternate) X City of North Las Vegas (1 Member) Frazier Speaks (Member) X Daniel Ybarra (Alternate) X Clark County Water Reclamation District (1 Member) Daniel Fischer (Member) CHAIR X Greg Turner (Alternate) X Moapa Valley Water District (1 Member) Joe Davis (Member) X Lon Dalley (Alternate) X Las Vegas Valley Water District (1 Member) Todd Tietjen (Member) X Xiaoping Zhou (Alternate) X Mesquite (1 Member) Bill Tanner (Member) X Travis Anderson (Alternate) X Virgin Valley Water District (1 Member) VACANT (Member) Aaron Bunker (Alternate) X Boulder City (1 Member) Dennis Porter (Member) X Jim Keane (Alternate) X Guests Present Donahue, Rick CCWRD Jorgenson, Catherine CC District Attorney Gerrity, Dan SNWA Kodweis, Greg SNWA 1. CALL TO ORDER The Sewage and Wastewater Advisory Committee (SWAC) meeting was called to order by Chair Dan Fischer, Clark County Water Reclamation District at 9:10 a.m. It was confirmed that the meeting was properly noticed and posted in accordance with the Open Meeting Law. 2. COMMENTS BY THE GENERAL PUBLIC - None 3. APPROVAL OF THE MINUTES OF THE MEETING OF FEBRUARY 5, 2020 Howard Analla moved and John Solvie seconded to accept the February 5, 2020 minutes. The motion was unanimously approved. 4. APPROVAL OF AGENDA WITH THE INCLUSION OF ADDING EMERGENCY ITEMS/DELETING ITEMS Ebrahim Juma moved and Howard Analla seconded to approve the agenda. The motion was unanimously approved. 5. OPEN MEETING LAW DISCUSSION Postponed due to technical issues that occurred on the MS Teams platform. 6. COVID WASTEWATER EPIDEMIOLOGY PRESENTATION • SARS-CoV-2 RNA is detected in feces of infected individuals. Wastewater surveillance looks for fragments of the genetic material to detect the presence of the virus in the community. • Wastewater surveillance is a potential early warning tool to aid in clinical testing. Wastewater analysis can be completed in real-time (< day) and provide insight into actual conditions in the community. • Wastewater surveillance confirms that infections in Southern Nevada increased in June/July, which correlated with increased community infection rate. DNA markers accurately characterize conditions in the community. • Sequencing pooled wastewater samples has the potential identify the dominant genotypes in the community, which can help direct public health mitigation measures. 7. DISCUSSION AND DISTRIBUTION OF QUARTERLY FLOW REPORTS The group discussed the flow report for the second quarter of 2020: • 2020 tourist contribution to wastewater was dramatically decreased due to COVID-19 restrictions in March through May 2020 than previous years. Lower flow rates were detected in CCWRD and CLV data. • CCWRD flow rates over a four-day period in March dropped by 20% due to a decrease in tourism caused by the stay-at-home order. o CCWRD BOD and TSS dropped by 30%, resulted the influent becoming more dilute. Those lost flows were more concentrated than the average flows. Suggests that flows from the Strip are more concentrated than residential or commercial influent. 8. MEMBER UPDATES A. Moapa Valley Water District • N/A B. Las Vegas Valley Water District • CLV and SNWA samplers detected trace concentrations of microcysts in Lake Mead. Evaluations are currently underway to detect the toxin. C. Boulder City • N/A D. Virgin Valley Water District • N/A E. City of Mesquite • N/A F. City of Las Vegas • Construction project updates: o Digester rehabilitation project is 85% complete. o Nitrification miscellaneous improvement project is complete. o Effluent analyzer upgrade project is complete. o Bridge project to connect DI to Hollywood is underway. The bridge will cross the Wash. o Solar site security project is 60% complete. • Projects in design: o Process air systems project has just entered the design phase. The project will evaluate the utility of new turbo blower technology before replacing the current blowers. • Proposal updates: o SCADA intergrader project design was awarded to Wunderlich Malec Engineering. o RFP to move from current CMMS to a different CMMS has been place on hold. • Sharon Hardy is the new Laboratory and Compliance Manager. • Brian Oswalt no longer works for CLV; there is now SWAC member vacancy which be appointed soon. G. Clark County Water Reclamation District • Collection System Updates: o Rehabilitation of 4 small lift stations is complete. They plan to be deployed after Labor Day. o Lincoln and Whitney lift stations are in redesign. Set aside 40 million dollars to rebuild Whitney lift station. o NDEP was notified of a 500,000 gallon spill that occurred at Whitney lift station early in 2020. At the requested of NDEP, CCWRD submitted additional information; response is pending. • Flamingo Plant Updates: o CCWRD is anticipating a reduction in user payments (due to COVID-19 impacts), which could potentially impact future CIP projects. o Planning to expand the front end of primary and secondary areas of the main plant. o Reuse pump station is nearing completion. o DAFTS rehabilitation project is on-going. o NPDES permit negotiations are on-going. • Preparations to rehabilitate the Moapa Valley lift station are underway. H. City of North Las Vegas • N/A I. City of Henderson • On-going projects: o WRF project entered phase 4. The project is expanding the east complex by adding process trains to increase capacity by 8 million gallons/day to allow segments of the west side to be shutdown and rehabilitated. o Ultraviolent light disinfection upgrade project is underway. o West chemical building is undergoing rehabilitation to address electrical issues. o SWRF headworks air treatment system project will replace the air collection piping. o Lake Las Vegas lift station is undergoing rehabilitation to add a pump set and rehabilitate various components. o The construction of the new Summerhouse lift station at Lake Las Vegas is on-going. • A project to add new leap aeration to the membrane system is scheduled to begin in October 2020. • SWRF had problems with activated sludge settling and being cloudy. Identified the cause was due to a breakdown of a pretreatment system from one of their main customers. The system has been repaired. • Lake Las Vegas lift station 19 was successfully rehabilitated and is back online. Another lift station was taken offline. • Created Operator 2C position to assist in the oversight of larger projects. A pilot program, running through December, will help finalize the position’s requirements and eligibility criteria. • Unit Supervisor, Paul Gilgens, retired in August 2020. • WW Operator II is retiring in September 2020. • Assistant Manager is retiring in October 2020. • To accommodate the development and projected growth within Henderson, there was a small expansion of the Green Valley reclaim distribution system going towards the SWRF. Additional conditions assessments are being conducted to determine if the system needs a complete rehabilitation. 9. CLARK COUNTY / 208 AREA WIDE WATER QUALITY MANAGEMENT PLAN UPDATE A. Water Quality Standards update: A presentation was made to NDEP on the efficacy of the existing Selenium data to use for calculating site-specific standards for Las Vegas Wash. NDEP is in concurrence. A meeting is being planned with EPA to present the proposed methodology for approval. B. MS4 Permit update: The draft permit is still being reviewed by the NDEP BWPC Bureau Chief and has not yet been distributed to the MS4 co-permittees. C. 208 update: Work is ongoing on the recommendations assessment and the plant project assessment. 10. MEMBER VACANCIES A. Virgin Valley Water District – 1 member vacancy B. City of Las Vegas – 1 alternate vacancy; 1 member vacancy 11. COMMENTS BY THE GENERAL PUBLIC - None 12. SCHEDULE NEXT MEETING The next meeting will be scheduled on November 4, 2020 at 9:00 am at the Clark County Water Reclamation District, 5857 E. Flamingo Road, Las Vegas, NV, 89122. A meeting invite will be sent out. 13. ADJOURNMENT The meeting was adjourned at 10:34 am. 2020 2nd Quarter Flow Report For Clark County Sewage And Wastewater Advisory Committee (SWAC) August 18, 2020 Wastewater Flows 2018 through 2020 Clark County Water Reclamation District Wastewater Flows 120.00 100.00 80.00 60.00 Average MGD Average 40.00 20.00 0.00 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2018 102.35 101.52 102.61 104.73 106.20 106.72 111.17 113.39 110.11 107.70 102.86 101.31 2019 102.48 101.90 104.00 105.63 106.42 107.84 109.74 109.74 108.48 105.63 105.45 104.93 2020 104.74 104.72 98.35 89.42 92.00 98.74 102.12 City of Las Vegas Wastewater Flows 50 45 40 35 30 25 Average MGD Average 20 15 10 5 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2018 47.85 46.98 47.35 44.69 43.85 44.23 44.86 45.70 45.82 43.57 43.08 42.18 2019 43.54 43.56 43.27 44.01 43.74 43.17 42.02 42.27 42.15 41.87 41.85 41.86 2020 41.67 41.68 41.67 40.09 41.13 43.20 43.52 City of Henderson Wastewater Flows 30 25 20 15 Average MGD

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