Water Conservation In Schools

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Water Conservation In Schools

  1. 1. Institutional Water Use Water Use In Schools – How to Conduct a Water Audit and Save! Brent M. White Suncoast Earth Force Teachers Workshop August 2, 2010 Gary Adult High School Tampa, FL
  2. 2. Why Take Action on Environmental Issues? Industry, business, and government organizations are adopting sustainable practices in their work place. Incorporating these practices may provides benefits including:  Reduced utility bills  Improved property value  Greater competitiveness  Enhanced public image  Improved local ecosystem 5/17/2011 2
  3. 3. What Can Schools Do? Schools too have been taking action on environmental issues. By taking action, schools will be able to:  Save money!  Instruct current generations on how to deal with future issues.  Integrate environmental education into the curriculum.  Reduce waste and other environmental impacts.  Improve cooperation throughout the school community.  Promote environmental values, attitudes, knowledge and skills to their students and staff. 5/17/2011 3
  4. 4. Why Water? Water is only thought about in times of drought or flood. Virtually everything we do or use involves water. Even though supply is finite, we tend to take water for granted. Simple actions can be adopted to reduce waste and use water wisely. 5/17/2011 4
  5. 5. What is a Water Audit? Monitoring water use is a good start. Can be achieved by doing a water audit. An audit will reveal your current water use and management system. Provides background information for developing actions for reducing water use. Will also create a starting point from which improvements can be measured. 5/17/2011 5
  6. 6. Conducting the Water Audit Five components to an water audit 1. Selecting which facility to evaluate. 2. Gathering facility demographics. 3. Conduct the on-site evaluation. 4. Prepare the evaluation report. 5. Follow-up. 5/17/2011 6
  7. 7. Selecting Facilities to Evaluate Compile annual water use records by facility type. Refine the database by water used per measurement parameter. Compare the water-use rate to the benchmark value for the type of facility. Reorder the list of facilities by potential water savings into a chart. 5/17/2011 7
  8. 8. School Baseline5/17/2011 8
  9. 9. Gathering Facility Demographics Information to be gathered about a facility to be audited includes:  Address  Number of employees  Facility contact  Percent male/female  Title  Full / Part time  Age of facility  Meter size and count  Building size  Water source(s)  Operating hours/days  Billing class / rates  Shifts per day  2-years of water history 5/17/2011 9
  10. 10. Conducting On-Site Evaluation Determine the water use rate for all equipment and processes. Consistency is important Major areas to include are:  Sanitation  Heating / Cooling  Kitchen  Leak detection  Office  Water used in products  Miscellaneous  Alternative water use  Irrigation  Staff input 5/17/2011 10
  11. 11. Evaluation Report Contents Evaluate Annual Water Consumption  Detail the water and sewer billing data for the facility by:  Average monthly usage and cost  Peak monthly usage and cost  Average daily usage and cost  Total annual usage and cost  Monthly use by meter type  Display seasonal influences on water use. 5/17/2011 11
  12. 12. Seasonal Water Use Breakdown Sample Seasonal Water Use Trends Irrigation Domestic Tower Blowdown Linear (Tower Blowdown) Linear (Irrigation) Linear (Domestic) Fall Spring 900 800 700 600 Use (gal) 500 400 300 200 100 0 Apr-04 May-04 Jun-04 Jul-04 Aug-04 Sep-04 Oct-04 Nov-04 Dec-04 Jan-05 Feb-05 Mar-05 Month 5/17/2011 12
  13. 13. Evaluation Report Contents Water Budget Includes:  Facility Statistics  Equipment water use ratings (Existing and Proposed)  Frequency of use  Days per year of use  Estimated / Adjusted use  Per year  Estimated savings  Per year 5/17/2011 13
  14. 14. The Water Budget Estimated Adjusted Estimated Water Usage Days Per Use/Yr Use/Yr Savings/Yr Application Basis Existing Proposed Frequency Year (ccf) (ccf) (ccf)Heating/Cooling Cooling Towers 350 Tons 53.76 gal/ton/day 43.01 gal/ton/day 1 uses/day 365 days 9,181.60 7,345.63 1,835.98 9,181.60 7,345.63 1,835.98 Sanitation Toilets 1,400 Customers 1.6 gpf 1.6 gpf 0.25 flush/person/day 312 days 233.58 233.58 0.00 Toilets 20 Staff 1.6 gpf 1.6 gpf 4 flush/person/day 312 days 53.39 53.39 0.00 Urinals 700 Male customers 1.5 gpf 1 gpf 0.25 flush/person/day 312 days 109.49 72.99 36.50 Urinals 10 Staff 1.5 gpf 1 gpf 2 flush/person/day 312 days 12.51 8.34 4.17 Faucets 1,400 Customers 2.2 gpf 1.5 gpf 0.25 min/day 312 days 321.18 218.98 102.19 Faucets 20 Staff 2.2 gpm 1.5 gpm 1 min/day 312 days 18.35 12.51 5.84 Showerheads 21 Staff 2.5 gpm 2.5 gpm 2 min/day 313 days 43.94 43.94 0.00 Total Sanitary: 748.51 599.81 148.70 Kitchen Hand sinks 3 Number 6 gpm 2.5 gpm 3 min/day 312 days 22.52 9.39 13.14 Prep sinks 6 Number 6 gpm 4 gpm 5 min/day 312 days 75.08 50.05 25.03 Brewed tea sales 1 Number 360 gal/month 360 gal/month 12 months 1 year 5.78 5.78 0.00 Lemonade sales 1 Number 900 gal/month 900 gal/month 12 months 1 year 14.44 14.44 0.00 Coffee sales 1 Number 300 gal/month 300 gal/month 12 months 1 year 4.81 4.81 0.00 Pre-rinse sprayer 2 Number 8 gpm 1.6 gpm 10 min/day 312 days 66.74 13.35 53.39 Ice-machine 1 Number 0.28 gal / lb ice 0.28 gal / lb ice 600 lbs. Ice 312 days 70.07 70.07 0.00 Steam table 1 Number 2 gpd 2 gpd 312 days 1 year 0.83 0.83 0.00 Bun warmer 1 Number 0.25 gpd 0.25 gpd 312 days 1 year 0.10 0.10 0.00 Steam cabinet 1 Number 3 gpd 3 gpd 312 days 1 year 1.25 1.25 0.00 Soda tower 2 Number 10 fl. oz./soda 10 fl. oz./soda 725 sodas 312 day 47.25 47.25 0.00 Total Kitchen: 308.88 217.33 91.56 Misc. Hose bibb 1 Number 6 gal/use 6 gal/use 3 uses/day 312 days 7.51 7.51 0 Spray sanitizers 1 Number 3 gpd 3 gpd 1 uses/day 312 days 1.25 1.25 0 Floor cleaning 1 Number 3 gal/use 3 gal/use 18 uses/week 312 days 22.52 22.52 0 Total Misc: 31.28 31.28 0 Irrigation 300 sq. ft. 5 gal/sq. ft. 5 gal/sq. ft. 2 uses / week 52 weeks 208.56 208.56 0 Total Water Use: 10,478.84 8,402.60 2,076.24 5/17/2011 14
  15. 15. Evaluation Report Contents Efficiency recommendations / payback periods related to annual savings  Payback = $ to implement ÷ Annual Savings  Contractors and vendors can supply costs  Annual savings is based on water and sewer costs  Increased savings when tiered rate structures are in place.  Incorporate electric savings with items that use hot water. 5/17/2011 15
  16. 16. Evaluation Report Contents Recommended Water Efficiency Measures  Each recommendation contains:  Current equipment rating  Suggested change  Number of changes, equipment  Cost – estimated (include sewer and extensions)  Savings – estimated (include sewer and extensions)  List reclaimed water if applicable  Annual payback periods 5/17/2011 16
  17. 17. Sample RecommendationInstall low-volume pre-rinse sprayerYour pre-rinse sprayer(s) near your dish station use: 6 gpm.We recommend replacing them with a model that uses: 1.6 gpm.Note: The Energy Policy Act of 2005 (EPAct), in effect since Jan 1, 2006states that all pre-rinse units and replacement spray valves used for warewashing must have a maximum flow of 1.6 gpm at 60 p.s.i.Project Cost:Estimated cost: $ 75 per nozzles.Total project cost: $ 75Savings:Estimated savings: 10.98 Kgal per year.Cost to heat water: $ 0.50 per Kgal.Water savings value: $ 57.32 (including sewer)Payback period:This recommencation may pay for itselfwith water and sewer savings in: 1.31 years.5/17/2011 17
  18. 18. Evaluation Report Contents Secondary Conservation Items  Unallocated water  Water use that is not identified  Special Comments  Possible leaks / detection  Booster pump effects  Availability of reclaimed water  Additional water savings tips  Contact information 5/17/2011 18
  19. 19. Evaluation Report Contents Summary of measures  Cumulative list of conservation measures  Total of all measures Recommended Initial Savings Expense Payback Measures Cost ccf/year Avoided Period (yrs) Replace 3.5 gpf toilet $ 125 24.18 $ 126.22 0.99 Install efficient pre-rinse sprayer 120 6.29 32.83 3.65 Install prep sink aerator - 2.62 13.68 0.00 Install handsink aerator - 1.05 5.48 0.00 Install spray nozzles on hose bibbs - 3.67 19.16 0.00 Total: $ 245 37.81 $ 197.37 1.24 5/17/2011 19
  20. 20. Satisfaction and Effectiveness One-year after the evaluation  Follow up with facility  Determine the implementation rate  Gauge the participant’s satisfaction  Measure long-term implementation  Satisfaction with new equipment  Satisfaction with personnel involved  Perceived change in utility bill  Incorporate information about available related programs 5/17/2011 20
  21. 21. Canterbury School Audit Audit was performed in October ‘09  251 students  46 full-time staff  5 part-time staff  Multiple events throughout year  Sporting events  Theater productions  Community meetings  Parent Association meetings  Booster Club events 5/17/2011 21
  22. 22. Canterbury School Audit Various stages of construction  All had plumbing code requirements specific to the year the building was constructed.  Evident in the flow rates of sanitary fixtures  Example: Pre-1994 toilets use 3.5 gallons per flush (gpf), Post-1994 toilets use 1.6 gpf  Requires allocation of facility population to specific buildings/fixtures 5/17/2011 22
  23. 23. Canterbury School Audit Before audit:  Chart 4-years of water and sewer records 5/17/2011 23
  24. 24. Canterbury School Audit Benchmarks used in Water budget  Flushes per day – US EPA Water Conservation Plan Guidelines  Faucet minutes per day – US EPA Water Conservation Plan Guidelines  Showerhead minutes per day – Determined during audit interviews with facility staff  Visitor Attendance – Estimated at 20,000 per year  Ice Used – Based upon ice machine production ratings  Soda sales – 1.5 sodas per visitor per year 5/17/2011 24
  25. 25. Canterbury School Audit Gallons / Student / Day  Use as a baseline for comparison  Compared to other High Schools in St. Petersburg’s service area  Gibbs High – 2,200 students – 9.17  Lakewood High – 1,810 students – 4.11  Canterbury School – 251 students – 34.07 5/17/2011 25
  26. 26. Canterbury School Audit Allocation by Water Use Type Lab/Class Lab/Class Misc 6.24% 1% Kitchen 3% Irrigation Kitchen 2.94% 5% 12% Misc. 12.40% Irrigation 3.52% Sanitary 31% Athletic 16.75% Cooling 48% Sanitary 58.16% 1997 SWFWMD Study 2008 Canterbury Audit 5/17/2011 26
  27. 27. Canterbury School Audit Indoor recommendations  3.5 Flushometer toilet retrofits  Estimated savings of 201 Kgal  Savings value of $951.54  Payback period of 1.05 years  Bathroom faucet aerators  Estimated savings of 468 Kgal  Savings value of $2,448.63 (includes heating)  Payback period of 0.02 years  Urinal flush valve retrofits  Estimated savings of 58.7 Kgal  Savings value of $279.60  Payback period of 0.45 years 5/17/2011 27
  28. 28. Canterbury School Audit Indoor recommendations  Low-flow showerheads  Estimated savings of 11.7 Kgal  Savings value of $61.19 (includes heating)  Payback period of 1.31 years  Hand sink aerators  Estimated savings of 5.304 Kgal  Savings value of $27.74 (includes heating)  Payback period of 0.22 years  Hose bibb spray nozzles  Estimated savings of 24.57 Kgal  Savings value of $116.22  Payback period of 0.23years 5/17/2011 28
  29. 29. Canterbury School Audit Indoor recommendations  Kitchen/Prep sink aerators  Estimated savings of 11.7 Kgal  Savings value of $61.19 (includes heating)  Payback period of 1.31 years Summary of Indoor Measures Recommended Initial Savings Expense Payback Measures Cost CGal/year Avoided Period (yrs) Replace 3.5 gpf flushometer toilets $ 1,000.00 2,011.72 $ 951.54 1.05 Install urinal flush valve retrofit kit 125.00 587.40 279.60 0.45 Install faucet aerators in the bathrooms 48.00 4,681.26 2,448.30 0.02 Install low-flow showerheads 80.00 117.00 61.19 1.31 Install hand sink aerators 6.00 53.04 27.74 0.22 Install prep sink aerators 6.00 182.00 95.19 0.06 Use spray nozzles on hose bibbs 27.00 245.70 116.22 0.23 Total: $ 1,292.00 7,878.12 $ 3,979.78 0.48 5/17/2011 29
  30. 30. Canterbury School Audit Outdoor Recommendations  Clean and replace clogged nozzles  Repair leaks in irrigation system  Convert to low-volume irrigation  Application specific recommendations  Straighten nozzles  Cap off some rotors and/or pop-ups  Increase plant bed size  Convert turf areas to mulched areas  Improve uniformity by matching nozzle flow rates to demands (separate turf from shrub zones)  Realign nozzles so as not to spray on impervious surfaces 5/17/2011 30
  31. 31. Canterbury School Audit Outdoor Recommendations  Irrigation duration/schedule Time April - October November - March Type Parking Lot South 20 Twice/Week Once/Week Mixed Parking Lot North 20 Twice/Week Once/Week Mixed Elevated Beds 25 Once/Week Once/2 Weeks Plants East Side of Building 45 Twice/Week Once/Week Turf Colonade 25 Once/Week Once/2 Weeks Plants Field House 20 Twice/Week Once/Week Turf South and Front 25 Once/Week Once/2 Weeks Plants  Inspect system monthly  Visually examine all sprinkler heads  Ten minutes of operating time is allowed  An attendant must be present  Check rain sensor operation 5/17/2011 31
  32. 32. Canterbury School Audit Outdoor Recommendations  Seashore Paspalum (Paspalum vaginatum)  Similar to Bermuda grass  Heals faster  Salt-tolerant  Requires 50% less water  Uses 75% less Nitrogen  Half of all athletic fields in Charlotte County uses Seashore Paspalum  Varieties: Sea Dwarf, Aloha, Sea Isle, Sea Spray 5/17/2011 32
  33. 33. Canterbury School Audit Outdoor recommendations  Fountain wind speed control system  Automatically slow down or shut off a fountain if surrounding wind speeds are high enough to blow the spray out of the fountain basin.  Reduces spray drift that reaches impervious surfaces.  Fountains currently restricted to 4-hours of operation per day. 5/17/2011 33
  34. 34. Canterbury School Audit Outdoor recommendations  Stormwater reuse  Collecting and storing precipitation for future use.  Done on a larger scale by utilities  Aquifer Storage and Recovery (ASR).  Stores water during the rainy season for the dry season  Cisterns  Rain Barrels 5/17/2011 34
  35. 35. Implementation Options Alternative funding opportunities:  Performance Contracting  Existing utility rebate programs  Retrofit giveaways  Mini-grants for educational efforts that incorporate water savings.  Splash mini-grants – School based  Community Education grant – Public based  Source Water Protection (TBW)  Estuary Program Grants 5/17/2011 35
  36. 36. Thank You! For more info:Brent.White@swfwmd.state.fl.us 1-800-423-1476 ext. 4214

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