Term
How many WE credits?
Name them?
Total points? |
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Definition
3 credits
1 - Water Efficient Landscaping
2 - Innovative Wastewater Technologies
3 - Water Use Reduction
5 points total |
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Term
| How many Points for WEc1? |
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Definition
2 points for Water Efficient Landscaping
1.1 - Reduce by 50%
1.2 No potable use/ no irrigation |
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Term
| What is the intent of WEc1? |
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Definition
Water Efficient Landscaping
Limit/ Eliminate the use of potable or
other natural surface/subsurface
water resources available on /near
the project site for landscape irrigation
Reduce potable water consumption for irrigation from a mid-summer baseline |
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Term
| What are some strategies to reduce irrigation by 50%? |
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Definition
Plant Species Factor - choose species who need little or no irrigation
Irrigation Efficiency
Use captured/ recycled rainwater
Use water treated by a public agency for non-potable uses |
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Term
| What is a strategy for water efficient landscaping? |
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Definition
Perform a soil / climate analysis to determine appropriate plant material & design landscape with native / adapted plants to reduce/ eliminate irrigation.
Consider using greywater, stormwater, condensate for irrigation |
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Term
| What is the Landscape Coefficient KL? |
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Definition
The volume of water lost to evapotranspiration
(due to species / microclimate/ density) |
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Term
| What is the density factor (kd)? |
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Definition
The density factor accounts for the # of plants & the total leaf area of the landscape.
Avg kd: shading from trees = 60-100%
shrubs + groundcover = 90-100%
Low kd is found where ground shading from trees is 60% or lower
shrubs + groundcover is less than 90% |
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Term
| What is the microclimate (kmc) factor? |
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Definition
Microclimate Factor takes into account environmental conditions specific to the landscape incl. temp, humidity, wind
AVG kmc: landscapes unaffected by bldgs
HI kmc: areas near pkg lots, west sides of bldgs |
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Term
Can WEc1.2 be earned on its own?
Is there exemplary performance for WEc1? |
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Definition
No - if reduction of potable water is >= than 50% , then WEc1.1 is earned
If Reduction of Potable Water use is 100% AND the % reduction of TOTAL water use is >= 50% then WEc1.2 is also earned
No ID credits |
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Term
| What is the intent of WEc2 - Innovative Wastewater Technologies? |
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Definition
| Reduce generation of wastewater and potable water demand while increasing the local aquifer recharge |
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Term
| How many options are there for WEc2 and what are they? |
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Definition
2
Reduce by 50%
Treat 50% |
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Term
| What are some strategies to reduce potable water use for building sewer conveyance? |
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Definition
Specify high efficiency fixtures, dry fixtures to reduce wastewater volumes
Use greywater, stormwater for sewage conveyance |
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Term
| What are some strategies for treating wastewater onsite? |
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Definition
On site waste-water treatment systems can be natural or mechanical
Packaged biological nutrient removal
Constructed wetlands
High-efficiency filtration
Must be treated to tertiary standards |
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Term
| How is the 50% reduction in blackwater determined? |
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Definition
Calculate FTE
Create Design Case
List all blackwater producing fixtures
Multiply by frequency of use
Multiply by FTE to generate Volume
Multiply Volume x # of workdays
Subtract Greywater & harvested water used to convey wastewater
The result is how much potable water is used to convey poop
Create Baseline case
Determine % reduction |
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Term
| Is there an ID credit for WEc2? |
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Definition
Yes
100% reduction in Potable Water Use for Sewage Conveyance
OR
100% On site treatment & reuse/ infiltration of generated wastewater
i.e. use no potable water or keep wastewater on site |
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Term
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Definition
Water Use Reduction
C3.1 Reduce by 20%
C3.2 Reduce by 30%
Extra Credit Reduce by 40% |
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Term
| What is the intent of WEc3? |
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Definition
| Maximize water efficiency within buildings to reduce the burden on municipal water supply & wastewater treatment systems |
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Term
| What is the referenced standard for WEc3? |
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Definition
EPA Energy Policy Act of 1992 -
fixture performance requirements |
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Term
| What are some strategies to reduce water use? |
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Definition
High efficiency fixtures
dry fixtures
occupant sensors
to reduce POTABLE water demand
Consider reuse of stormwater/ greywater for non-potable applications
Examples: toilet / urinal flushing
custodial
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Term
| Which fixtures are used to calculate the Design Case for WEc3? |
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Definition
Toilets
Urinals
Bathroom Sinks (LAVS)
Showers
Kitchen Sinks
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Term
Can you use the following high efficiency fixtures to satisfy WEc3:
DW
Clothes Washers
Cooling Towers
Other high efficiency fixtures? |
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Definition
Only for Exemplary Performance - 40%
These fixtures + process water can count towards 10% of savings |
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