BLDG. DESCRIPTION 02. CESAR CHAVEZ LIBRARY. Don Gray // Tucker Douglas. Line & Space Architects Laveen, Arizona AIA/COTE Top Ten Green Projects

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1 0. CESAR CHAVEZ LIBRARY Don Gray // Tucker Douglas Line & Space Architects Laveen, Arizona AIA/COTE Top Ten Green Projects BLDG. DESCRIPTION The responsible management of water, a scarce resource in the desert, is critical. An integral gutter collects rainwater from the 37,000ft roof; the water is stored in the adjacent lake and used for irrigating the 0-acre park. This quantity of water is equal to the amount used for flushing toilets within the building for a year. Water from patio and foundation drains is piped to trees surrounding the library, and condensation from rooftop mechanical units is used to irrigate the vegetated island of the new parking lot. A high-efficiency, automatic irrigation system distributes harvested water to drought-tolerant trees and shrubs. The irrigation controller allows for seasonal programming, lowering water use by over 50%.

2 BLDG. DESCRIPTION Low-flow toilets, waterless urinals, and faucets with sensors reduce indoor water use by 30%, compared with a conventional building. Typically occupied by 6 people, 0 hours per person per week; and 6,00 visitors per week, 1 hour per visitor per week BLDG. DESCRIPTION Key- 1. Entry Plaza. Entry 3. Service Desk. Computers 5. Media Stacks 6. Collection Stacks 7. Teen Area 8. Reading Patio 9. Children s Area 10. Easy Children s Story Room 1. Computer Classroom 13. Staff Of ces 1. Staff Patio 15. Break Room 16. Meeting Room 17. Staff Entry 18. Circulation Workroom 19. New Book Display 0. Cesar Chavez Artifacts Display 1. Book Drops. Catch Basin 3. Edge of Roof (Above). Skyholes 5. Sculpture 6. Earth Berms Lake Floor Plan

3 WATER CONSERVATION WATER USE Indoor potable water use Outdoor potable water use Total potable water use Potable water use per unit area: 1,30,000 gal/yr (,670,000 liters/yr) 733,000 gal/yr (,770,000 liters/yr) 1,970,000 gal/yr (7,0,000 liters/yr) 77.9 gal/sq ft (3,170 liters/sq meter) Source: The American Institue of Architects Precipitation managed on site: 100% Total water used indoors: gal/yr Total water used outdoors: gal/yr Percent of total water from reclaimed sources: 37% Percent wastewater reused on-site: 0% Calculated annual potable water use: 77.9 gal/sf/yr Source: The American Institue of Architects Installed plumbing fixtures Fixture type Male Female Either Recyclable? Waterless urinal No, black water Water fountain Yes, grey water Battery powered hand washing faucet 3 3 Yes, grey water Low consumption water closet 3 No, black water Service sink Yes, grey water WATER CONSERVATION Water Use Estimate # of People Gallons per day Total GPD Staff Student Estimated # by visitor hours, (WU) Conventional BLDG. Water Usage Actual Water Usage Fixtures Urinal Fountain Washroom faucet Toilets Service sink # 8 9 WSFU Total (FU) GPF Fixtures Urinal Fountain Washroom faucet Toilets Service sink # 8 9 WSFU Total (FU) GPF GDP GPFU = (WU/FU) Summary 550 GPD vs 036GPD, savings of 150GPD over conventional building is about 30%

4 WATER CONSERVATION TOILETS HOT SUPPLY 385 GALLONS URINALS COLD SUPPLY 5155 GALLONS RESTROOM SEWER 5533 GALLONS SERVICE DRINKING FOUNTAIN SUPPLY 550 GALLONS CONVENTIONAL WATER SUPPLY DESIGN WATER CONSERVATION TOILETS HOT SUPPLY 179 GALLONS URINALS 5 COLD SUPPLY 3857GALLONS RESTROOM SEWER 036 GALLONS SERVICE DRINKING FOUNTAIN SUPPLY 036 GALLONS CURRENT WATER-CONSERVING SYSTEM DESIGN

5 STORM WATER Precipitation Normals Phoenix Sky Harbor (in) J.83 F.77 M 1.07 A.5 M.16 J.09 J.99 A.9 S.75 O.79 N.73 D.9 Total 8.9 STORM WATER 37,000 sq. ft. Roof collects annually 10,000 gallons of water, which is currently funneled into a catchment basin and deposited into the lake. The water is then used for irrigation purposes; however, with a lake of that area, in that climate, an extensive amount of water is being lost due to evaporation.

6 STORM WATER Scupper that directs 10,000 gallons annually off roof. Catchment basin collects water and sends it down for storage in on site lake RE DESIGN WATER CONSERVATION The current system implements only low flow water closets and waterless urinals. By switching the water closets to composting or incenerating toilets, the need for water in this system would be eliminated. Additionally, the current storm water management design takes water from the roof and uses it only for irrigation purposes and stores it in the on site lake, allowing for evaporative loss. Catching this water instead into cisterns would allow minimal filtration before the water could be used in all sinks within the building. Redirecting the waste water coming from sinks can implement a grey water reuse system through irrigation on site, reducing sewage input from about,000 gallons per day to less than 00 gallons per day.

7 RE DESIGN STORM WATER Redesigned water Demand: City Potable Water Demand for Drinking Fountains: 0 gpd * 365 = 7,300 gallons / year Cold Water Sink + Hot Sink Cistern Demand 179 gpd gpd = 358 gpd * 365 = 130,670 gallons / year CISTERN SIZING REQUIRED Phoenix area longest dry period: about 90 days (1/ year) 137,970 gallons per year / = 3,9 gallon capacity needed 3,9 gallons / 7.8 gal per cubic feet =,611 ft³ = Cisterns 10 Diameter, 1 Tall 1 10 RE DESIGN ROOF CATCHMENT 383 GALLONS /DAY AVERAGE INCINER- ATING TOILETS HOT CISTERN 179 GALLONS WATERLESS URINALS 5 COLD CISTERN 179 GALLONS RESTROOM SEWER 5 GALLONS /DAY CITY COLD WATER SUPPLY 0 GALLONS SERVICE DRINKING FOUNTAIN AUTOMATIC DRIP SYSTEM LANDSCAPING 393 GALLONS /DAY EXCESS RAIN ON ROOF 5 GALLONS WATER SUPPLY 03 GALLONS RE DESIGN WATER-CONSERVING SYSTEM

8 CONCLUSION Since the building already utilizes waterless urinals and sensored facets, we only proposed to replace toilets with incineraring toilets and redevelop the site s water collection system. Combing this fixture replacement with a redesign storm water management plan in the form of cisterns, we have reduced total city potable water consumption from,036 gallons to only 0 gallons per day. All sinks can be run on annual rainwater collection and supplemented by city water only during dry years. By reusing greywater on site, along with utilising incinerating toilets, daily sewage output has been reduced from 036 gallons to only 5 gallons.

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