Section 2: Individual LEED Credit Reviews
Table WE1.1-2
Generic Institutional Building Site with Irrigation Efficiencies
Landscape
Density
Species
Microclimate
Area
KL ETL
IE
TPWA
Area
Factor
Factor
Factor
%
Type
(ks)
(kd)
(kmc)
[%]
[SF]
[gal]
Street trees
5%
1,729
Avg
Avg
Avg
None
0.000
Groundcovers
15%
5,187
Avg
0.5
Avg
1.0
Avg
1.0
0.5
4.00
Drip
0.900
23,053
Mixed
15%
5,187
Avg
0.5
Avg
1.1
Avg
1.0
0.6
4.40
Drip
0.900
25,359
Sprinkler w/
0.825
152,571
Turfgrass
65%
22,477
Avg
0.7
Avg
1.0
Avg
1.0
0.7
5.60
controls
Subtotal [gal] 200,983
Total
34,580
July Graywater Harvest [gal]
Net GPWA [gal] 200,983
Potable Water Use Reduction Compared to Baseline
26%
Table WE1.1-3
GSA Courthouse Base Case Site
Landscape
Density
Species
Microclimate
Area
KL ETL
IE
Area
TPWA
Factor
Factor
Factor
%
Type
(ks)
(kd)
(kmc)
[%]
[SF]
[gal]
Street trees
5%
1,729
Avg
Avg
Avg
None
0.000
Sprinkler w/
Groundcovers
40%
13,832
Avg
0.5
Avg
1.0
Avg
1.0
0.5
4.00
0.825
67,064
controls
Sprinkler w/
0.825
73,771
Mixed
40%
13,832
Avg
0.5
Avg
1.1
Avg
1.0
0.6
4.40
controls
Sprinkler w/
Turfgrass
15%
5,187
Avg
0.7
Avg
1.0
Avg
1.0
0.7
5.60
0.825
35,209
controls
Subtotal [gal] 176,044
Total
34,580
July Graywater Harvest [gal]
Net GPWA [gal] 176,044
Potable Water Use Reduction Compared to Baseline
35%
GSA LEED COST STUDY
56
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