Louisville s Water Works

Transcription

1 Creating Treatment Optimization Louisville s Water Works Framework and Culture Celebrating Chris Bobay 150 Years Rengao Song, Ph.D. of Service Eric Zhu, Ph.D. Jack Wang, Ph.D. Water System Optimization Conference October 29, 2015

2 Presentation Outline LWC History Partnership History Performance Framework Highlight Reel Q/A

3 Louisville Water Company in 1860's Operations began in miles of main, 512 customers, 650,000 gpd

4 Louisville Water Company in 1860's Horsepower requirements then too

5 Louisville Water Company in 1880 s Crescent Hill Reservoir was built in 1879 to settle the sand and mud out of the Ohio River water

6 Louisville Water Company in 1900's Crescent Hill Treatment Plant went into operation in First rapid sand filters by George W. Fuller

7 LWC Today Crescent Hill WTP 180 MGD conventional Ohio River 14 clarifiers, 20 filters B.E. Payne WTP 60 MGD conventional Converted to River Bank Filtration (RBF) in 2011 Lime softening 6 clarifiers, 8 filters Fort Knox/River Ridge

8 LWC Distribution System 625 square miles 3 county retail service area >300,000 services, >850,000 customers 4,200 miles of pipeline 24,000 fire hydrants, 52,000 valves 55 pressure zones (2 primary) 35 tanks, 51 BPS, 40 PRV

9 Treatment Optimization Program LWC Achievements Program development Membership Phase III Directors Award (BEP & CHWTPs) Phase IV Excellence Award for BEP WTP Phase III Director s Award (Distribution) Phase IV Excellence Award for CHWTP 15 year process! 9

10 Culture Change is a Process

11 Climate Change and Culture Key ingredients: Strategic planning (mission, vision, values) Organization structure Capital investment Performance framework Corporate objectives Team goals Individual goals Complacency/Experience Compliance/Enforcement Continuous Improvement/Empowerment

12 Strategic Plan Mission: to provide safe, high quality water and related services that deliver an exceptional value to our customers, shareholder and community Vision: to provide best of class quality, customer service, innovation and value Values: quality, service, innovation, value, trust, confidence, satisfaction, partnerships, teamwork, safety SWOT Analysis: strengths, weaknesses, opportunities, threats Strategic Objectives: Water Quality (e.g. PSW Phase IV by 2017)

13 Walk the Talk 20 year Facilities Plan 2003 SCADA upgrade $3M 2006 south clarifier renovation $6M 2006 Pilot plant project $500k 2010 on-site chlorine generation $11M 2012 softening renovation $24M 2012 north clarifier renovation $8M 2012 coagulant feed system $5M 2013 filter renovation $35M Annual Performance Metrics System Operating Plans Individual Performance Goals Process Improvement

14 Organization Structure LWC Water Quality & Production Team Director: Dr. Jack Wang Operations Hydraulic and chemical systems for 2 plants and DS 21 employees (manager, engineer, 2 supervisors, 10 lead operators, 6 apprentices, chemical attendant) Maintenance Production facilities, equipment, instrumentation 19 employees (manager, engineer, 2 supervisors, 15 mechanics) Water Quality and Research Compliance, research/guidance, distribution WQ 24 employees (manager, 2 supervisors, 7 scientists, 2 lab technicians, 5 DSWQ, 7 CCCP)

15 Team Highlights: Source Water Monitoring Daily Spill Monitoring Collaborate with Ohio River Valley Sanitation Commission (ORSANCO) Detect 21 volatile organic compounds (VOCs) Seasonal Pesticide/Herbicide Monitoring Daily immuno-assay and/or GC-MS (April to August) Weekly immuno-assay and monthly GC-MS (September to March) Seasonal T&O Monitoring T&O panel (April to November) SPME/GC/MS: MIB/Geosmin

16 T&O Monitoring Early Warning April to November Daily monitoring (flow, NTU, ph, odor) 10-4 Rule (algae, panel, SPME/GC/MS) Enhanced Monitoring during Event Expanded monitoring Increased frequency Communication Treatment plan

17 Event Response 2005 Kentucky River Oil Spill Emergency feed system 2012 Ohio River T&O Event Largest T&O in LWC history (max Raw MIB 178 ppt) 2014 WV MCHM Spill Correctly identified as a T&O concern for LWC customers Timely detection and communications Plan development, monitoring, and treatment with 100% execution No Customer Complaints

18 Team Highlights: LCR Program Pb and Cu 90 th percentile levels are below the EPA AL Reduced monitoring schedule is once every 3 years A minimum of 50 samples collected: 25 min lead service lines (LSL) and 25 min copper pipes with lead solder (LSC) Voluntary LSL replacement program began in 1992 Voluntary School Lead Monitoring program began in 2004 Lead levels approached the AL during 2008 & 2011 monitoring periods Year Lead Copper Action Level 90 th Percentile Action Level 90 th Percentile ppb 5.1 ppb 1.3 ppm 0.12 ppm ppb 6.5 ppb 1.3 ppm 0.12 ppm ppb 12.7 ppb 1.3 ppm 0.28 ppm ppb 12.0 ppb 1.3 ppm 0.24 ppm

19 Research Plan Two treatment options evaluated using 7 water conditions CH finished water was collected weekly with ph adjustment for studying ph effect Three pilot waters were prepared to evaluate the effect of CSMR/switching coagulants and ph effect Water ph Collected Location Coagulant Used CSMR 1 8 CH finished ph reduced by HNO3 Full scale (FeCl3) CH finished Full scale (FeCl3) 3 9 CH finished ph increased by NaOH CH finished ph increased by NaOH Full scale (FeCl3) Full scale (FeCl3) Pilot finished FeCl3 Same Fe dose as CH Pilot finished Fe2(SO4)3 Same Fe dose as CH 7 9 Pilot finished Fe2(SO4)3 Same Fe dose as CH

20 Research Plan: Continued Two types of test coupons used (similar to WaterRF #4088) Non-galvanic solder (NGS) coupon - 50:50 Pb:Sn solder only (left picture) Galvanic solder (GS) coupon -50:50 Pb:Sn solder placed inside copper coupling (right picture) Two types of coupons have similar solder surface area Sampling procedure follows fill and dump protocol Fill and dump twice a week: Tuesdays and Fridays Composite the two samples as a weekly sample for metal analysis

21 ph Effect on Pb Release for CH Water Average level over 2 months

22 CSMR and ph Effect on Pb Release Average level over 2 months

23 LCR Results 2014 The reported 90 th percentiles for 2014 show ~ 50% reduction in lead and ~ 70% reduction in copper in comparison to previous two monitoring periods. ND

24 LCR Results 2014 The max concentrations for both lead & copper are the lowest recorded in the last 10 years There were zero samples that exceeded the EPA AL The detection ratio (# detects : total samples) is the lowest ever recorded for both lead & copper LEAD COPPER Max Concentration (ppb) Detection Ratio Max Concentration (ppm) Detection Ratio ,

25 Take-Aways Culture change is a slow process Climate change is necessary Empowerment over enforcement Shared success can shape culture

26 Questions? Chris Bobay