BRIAN GREGSON Rainwater Catchment Systems Accredited Professional Commercial & Industrial Water Conservation: Capturing an...
Who we are <ul><li>Irrigation Contractor </li></ul><ul><ul><li>Specializing in highly efficient water-conservation  soluti...
Why harvest rainwater? <ul><li>Preserve potable water for drinking and indoor uses </li></ul><ul><li>Stormwater management...
The PROBLEM: <ul><li>Population growth = greater demand on resources (power, water, etc) </li></ul><ul><li>Reduced reliabi...
Example: Desalination Plant <ul><li>A bit more complex than a well. </li></ul><ul><li>There’s a reason why it’s located ne...
Rainwater Harvesting: A Sustainable Option www.rainwaterservices.com Source:  www.stuckincustoms.com
Possible Uses for Rainwater www.rainwaterservices.com
$ & ¢: Volusia County www.rainwaterservices.com Volusia County Usage Rates  (W+WW) Usage (gallons) Unsoftened Rates (per 1...
www.rainwaterservices.com <ul><li>Example: Residential Family of 4 </li></ul><ul><ul><li>Installed cost: $20K </li></ul></...
www.rainwaterservices.com <ul><li>Example: Condo irrigation </li></ul><ul><ul><li>Installed cost: $250K </li></ul></ul><ul...
www.rainwaterservices.com <ul><li>Example: Tower Evaporative Loss </li></ul><ul><ul><li>Installed cost: $1M+ </li></ul></u...
Payback: ROI www.rainwaterservices.com <ul><li>Capital Cost Range </li></ul><ul><li>$50/GPD at 10,000 GPD </li></ul><ul><l...
Payback: ROR www.rainwaterservices.com <ul><li>ROR (Rate of Return) </li></ul><ul><ul><li>Residential: $32/mo x 50 =  $33,...
<ul><li>EPA – Science and Technology Center: Kansas City, KS </li></ul>www.rainwaterservices.com SITE INFO Total Facility ...
<ul><li>EPA – Gulf Ecology Devision Laboratory: Gulf Breeze, FL </li></ul>www.rainwaterservices.com SITE INFO Total Facili...
<ul><li>Office Complex – Twin Lakes Park </li></ul>Twin Lakes Park – Office Complex: Sarasota, FL Photo courtesy of Dickin...
Photo credit:  Timothy Hursley http://eere.buildinggreen.com/site.cfm?ProjectID=286 Rinker Hall, University of Florida Gai...
LEED Elementary School Remodel, St. Petersburg, FL www.rainwaterservices.com Project Owner: Project Type: CISTERN INFO Siz...
Many thanks… www.rainwaterservices.com
Questions? <ul><li>BRIAN GREGSON </li></ul><ul><li>[email_address] </li></ul><ul><li>@RainwaterServices </li></ul><ul><li>...
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Commercial & Industrial Water Conservation: Capturing and Using Rainwater for Large-Scale Applications

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Presentation to the Blue Spring Working Group, Deland, FL, September 9, 2010.
A Public Forum for Spring Protection & Restoration

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  • RHS= Rainwater Harvesting System
  • LID = Low Impact Development Site retention = reduced demand on stormwater processing A good strategy would be to, not only conserve water, but also to use an alternative water source (rainwater) for irrigation, and save our precious potable drinking water for drinking and other indoor uses. Not as cost-effective for small volumes, but for large = huge potential financial savings
  • IT’S ALWAYS ABOUT $$$$$ Rapidly and continuously growing region = resource demands e.g. nuke plant in citrus county = $$$ 20 years in advance! No longer able to simply dig a well Leads to search for more complex technologies (i.e. desal) WE WILL ALWAYS FIND A WAY TO PROVIDE CLEAN WATER, BUT AT WHAT COST???
  • As of March 12, reservoir storage was insufficient to maintain minimum production requirements at the surface water treatment. About 200 million gallons of water remains in the reservoir. We are managing the reservoir to maintain a viable habitat for the fish that remain in the reservoir. IN VOLUSIA: Coquina Coast = 1B+
  • How do we prolong development of new water supplies? As a part of effective conservation: RAINWATER HARVESTING
  • There are many uses for rainwater. Irrigation would be the application requiring the least amount of treatment before use. All contribute to offsetting municipal supplies.
  • Real world “dollars and cents” Over time, rates will increase. Admittedly, water is still relatively cheap compared to other utilities These rates can be offset by RHS. Water demands of large systems equal $$$ Potential savings on utility bills tangible for large systems
  • RESIDENTIAL: Assume 6000 gallon storage @ $3-4/gallon = approx. $20K IRRIGATION: Assume 7 days storage = 70K gallons COOLING TOWER: Assume 7-14 day storage (10 days = 250K gallons)
  • RESIDENTIAL: Assume 6000 gallon storage @ $3-4/gallon = approx. $20K IRRIGATION: Assume 7 days storage = 70K gallons COOLING TOWER: Assume 7-14 day storage (10 days = 250K gallons)
  • RESIDENTIAL: Assume 6000 gallon storage @ $3-4/gallon = approx. $20K IRRIGATION: Assume 7 days storage = 70K gallons COOLING TOWER: Assume 7-14 day storage (10 days = 250K gallons)
  • At first glance, doesn’t seem all that great: RESIDENTIAL: Assume 6000 gallon storage @ $3-4/gallon = approx. $20K IRRIGATION: Assume 7 days storage = 70K gallons COOLING TOWER: Assume 7-14 day storage (10 days = 250K gallons) Considering ROI alone, seems like a long-term payback. But…
  • But, ROR is a more appropriate financial metric Invest monthly savings at simple 2% annual interest
  • Contact info, social networking feeds Presentation available to public on slideshare
  • Commercial & Industrial Water Conservation: Capturing and Using Rainwater for Large-Scale Applications

    1. 1. BRIAN GREGSON Rainwater Catchment Systems Accredited Professional Commercial & Industrial Water Conservation: Capturing and Using Rainwater for Large-Scale Applications Blue Spring Working Group September 9, 2010
    2. 2. Who we are <ul><li>Irrigation Contractor </li></ul><ul><ul><li>Specializing in highly efficient water-conservation solutions </li></ul></ul><ul><ul><ul><li>Drip/micro irrigation, landscape drainage </li></ul></ul></ul><ul><ul><ul><li>RAINWATER HARVESTING </li></ul></ul></ul><ul><li>FIRSTS: </li></ul><ul><ul><li>ARCSA AP in State of FL </li></ul></ul><ul><ul><li>Permitted RHS in St. Pete </li></ul></ul><ul><ul><li>Institutional rainwater toilet flushing in St. Pete </li></ul></ul><ul><ul><li>Potable RHS in St. Pete </li></ul></ul><ul><ul><li>Potable RHS in Tampa </li></ul></ul><ul><ul><li>Permitted greywater(??) in Tampa </li></ul></ul><ul><li>Shifting focus to commercial applications </li></ul>www.rainwaterservices.com
    3. 3. Why harvest rainwater? <ul><li>Preserve potable water for drinking and indoor uses </li></ul><ul><li>Stormwater management </li></ul><ul><li>L.I.D. </li></ul><ul><li>Contribute to responsible growth </li></ul><ul><li>Large volume applications = $$$$ </li></ul>www.rainwaterservices.com
    4. 4. The PROBLEM: <ul><li>Population growth = greater demand on resources (power, water, etc) </li></ul><ul><li>Reduced reliability of groundwater </li></ul><ul><ul><li>Sinkholes?? </li></ul></ul><ul><li>“ Finding” new water = rising production costs </li></ul><ul><li>Ingenuity but at what cost?? </li></ul>www.rainwaterservices.com Tampa Bay Water Production & Carbon Costs (‘06 – ’09 Averages) Water Type Portion of Production Average Electricity Cost ($/MG) Groundwater 71% $70 Surface Water 23% $135 Desalinated 8% $1343 Blended Product -- $194
    5. 5. Example: Desalination Plant <ul><li>A bit more complex than a well. </li></ul><ul><li>There’s a reason why it’s located next to a power plant </li></ul><ul><li>EXPENSIVE: </li></ul><ul><ul><li>Initial cost = $110M </li></ul></ul><ul><ul><li>Ongoing remediation = $158M </li></ul></ul>www.rainwaterservices.com Source: SP Times Source: Desalination & Water Resource
    6. 6. Rainwater Harvesting: A Sustainable Option www.rainwaterservices.com Source: www.stuckincustoms.com
    7. 7. Possible Uses for Rainwater www.rainwaterservices.com
    8. 8. $ & ¢: Volusia County www.rainwaterservices.com Volusia County Usage Rates (W+WW) Usage (gallons) Unsoftened Rates (per 1,000 gallons) Softened Rates (per 1,000 gallons) 0-7,000 $4.73 $6.16 7,001-14,000 $4.96 $6.68 14,001-21,000 $5.45 $6.89 > 21,000 $7.94 $9.39 Volusia County Irrigation Rates Usage (gallons) Unsoftened Rates (per 1,000 gallons) Softened Rates (per 1,000 gallons) 0-7,000 $2.32 $3.76 > 7,000 $4.81 $6.26
    9. 9. www.rainwaterservices.com <ul><li>Example: Residential Family of 4 </li></ul><ul><ul><li>Installed cost: $20K </li></ul></ul><ul><ul><li>50 gpp x 4 x 30 = 6000 gallons per month </li></ul></ul><ul><ul><li>Unsoftened rate: $28.38; Softened rate: $36.96 </li></ul></ul>Utility Rates/Potential Savings: Moderate Residential = $
    10. 10. www.rainwaterservices.com <ul><li>Example: Condo irrigation </li></ul><ul><ul><li>Installed cost: $250K </li></ul></ul><ul><ul><li>10,000 gpd x 30 = 300,000 gallons per month </li></ul></ul><ul><ul><li>Unsoftened rate: >$1,400; Softened rate: >$1,800 </li></ul></ul><ul><ul><li>Per annum = $17K - $22K </li></ul></ul>Utility Rates/Potential Savings: Multifamily complex = $$$
    11. 11. www.rainwaterservices.com <ul><li>Example: Tower Evaporative Loss </li></ul><ul><ul><li>Installed cost: $1M+ </li></ul></ul><ul><ul><li>25,000 gpd x 30 = 750,000 gallons per month </li></ul></ul><ul><ul><li>Unsoftened rate: ~$6,000; Softened rate: >$7,000 </li></ul></ul><ul><ul><li>Per annum = $72K - $84K </li></ul></ul>Utility Rates/Potential Savings: Cooling Tower = $$$$$
    12. 12. Payback: ROI www.rainwaterservices.com <ul><li>Capital Cost Range </li></ul><ul><li>$50/GPD at 10,000 GPD </li></ul><ul><li>$15/GPD at 500,000 GPD </li></ul><ul><li>(specific site conditions would dictate actual costs) </li></ul><ul><li>ROI </li></ul><ul><ul><li>Residential: 50+ years (assumes 6000 gallons) </li></ul></ul><ul><ul><li>Condo Irrigation: 25 years (assumes 70K-100K gallons) </li></ul></ul><ul><ul><li>Cooling Tower: 10-15 years (assumes 200K-300K gallons) </li></ul></ul>
    13. 13. Payback: ROR www.rainwaterservices.com <ul><li>ROR (Rate of Return) </li></ul><ul><ul><li>Residential: $32/mo x 50 = $33,089.41 </li></ul></ul><ul><ul><li>Condo Irrigation: $1600/mo x 25 years = $625,787.51 </li></ul></ul><ul><ul><li>Cooling Tower: $6500/mo x 15 years = $1,374,178.64 </li></ul></ul><ul><li>Pay yourself the monthly utility bill </li></ul><ul><ul><li>Simple interest, assume 2% compounded monthly </li></ul></ul><ul><li>System pays for itself, plus returns profit equal to approx 1.5x initial capital cost!! </li></ul>
    14. 14. <ul><li>EPA – Science and Technology Center: Kansas City, KS </li></ul>www.rainwaterservices.com SITE INFO Total Facility Area: Total Water Consumption: Stormwater Reduction: Water Usage Reduction: Water Conservation Features: 71,955 gsf 3,050,556 gallons/year 40% 50% Graywater Reuse, Rainwater Harvesting, HVAC condensate recovery, deionized water recycling
    15. 15. <ul><li>EPA – Gulf Ecology Devision Laboratory: Gulf Breeze, FL </li></ul>www.rainwaterservices.com SITE INFO Total Facility Area: Total Water Consumption: Water Usage Reduction: Water Conservation Features: 78,006 gsf 4,884,834 gallons/year Extensive rainwater capture/reuse for toilets, cooling tower setpoint adjustments, native
    16. 16. <ul><li>Office Complex – Twin Lakes Park </li></ul>Twin Lakes Park – Office Complex: Sarasota, FL Photo courtesy of Dickinson Studios at http://www.myfloridagreenbuilding.info/Profiles/TwinLakes.html www.rainwaterservices.com Project Owner: Owner Type: Project Type: Gross Sq. Ft.: CISTERN INFO Size: Water Source: Use: Sarasota County Government Commercial Office 27,592 28,000 gallons Rainwater Flushing in water closets, irrigation
    17. 17. Photo credit: Timothy Hursley http://eere.buildinggreen.com/site.cfm?ProjectID=286 Rinker Hall, University of Florida Gainesville, FL www.rainwaterservices.com CISTERN INFO Size: Water Source: Use: 8,000 gallons Rainwater Toilet flushing
    18. 18. LEED Elementary School Remodel, St. Petersburg, FL www.rainwaterservices.com Project Owner: Project Type: CISTERN INFO Size: Water Source: Use: Jordan Park Elementary Institutional 2x 2,500 gallons Rainwater Toilet Flushing RAINWATER SERVICES FIRST BELOW-GROUND
    19. 19. Many thanks… www.rainwaterservices.com
    20. 20. Questions? <ul><li>BRIAN GREGSON </li></ul><ul><li>[email_address] </li></ul><ul><li>@RainwaterServices </li></ul><ul><li>@RWServices </li></ul>http://www.slideshare.net/RWServices www.rainwaterservices.com

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