Summary ofSummary ofBMP Savings Calculator BMP Savings Calculator
Example ResultsExample Results
SB X7 7 U4 Technical SubcommitteeSB X7 7 U4 Technical Subcommittee 14 October 201014 October 2010
(Revised 18 October 2010)(Revised 18 October 2010)
Richard A. MillsRichard A. MillsCalifornia State Water Resources Control BoardCalifornia State Water Resources Control Board
Presentation OverviewPresentation Overview
• Summary of Calculations using Summary of Calculations using David Mitchell’s Draft BMP Savings David Mitchell’s Draft BMP Savings CalculatorCalculator Updated version of calculator (since Updated version of calculator (since
last U4 meeting)last U4 meeting) Additional random example runsAdditional random example runs
Components of CalculatorComponents of Calculator
• CUWCC MOU BMPsCUWCC MOU BMPs 1.2 Water loss control1.2 Water loss control 1.3 Metering1.3 Metering 3.1 Residential assistance3.1 Residential assistance 3.2 Residential landscape3.2 Residential landscape 4 CII (including toilets/urinals)4 CII (including toilets/urinals) 5.2 Landscape budgets5.2 Landscape budgets
• Residential toiletsResidential toilets
• Residential washers & showerheadsResidential washers & showerheads
28 Water Suppliers Tested28 Water Suppliers Tested
• 12 non-random examples 12 non-random examples (reviewed last meeting)(reviewed last meeting)
• 20 random examples20 random examples 4 already in non-random group4 already in non-random group Most CUWCC membersMost CUWCC members
28 Water Suppliers Tested28 Water Suppliers Tested• North Coast – 1North Coast – 1• San Francisco Bay – 4San Francisco Bay – 4• Central Coast – 2Central Coast – 2• South Coast – 15South Coast – 15• Sacramento River – 4Sacramento River – 4• San Joaquin River – 1San Joaquin River – 1• Tulare Lake – 1Tulare Lake – 1
North CoastNorth Coast
Supplier 2005 Base-line
Targets & % Reduction
Calculator Method 1
Method 3
City of Crescent City 163 14113%
13020%
13020%
Note: For this and following slides, the % reduction under “Calculator” is without adding any statewide adjustment factor.
San Francisco BaySan Francisco Bay
Supplier 2005 Base-line
Targets & % Reduction
Calculator Method 1
Method 3
City of Palo Alto 189* 16215%
15120%
12434%
Marin MWD 135 11912%
10820%
1248%
City of Pittsburg 147 10826%
11720%
12415%
San Francisco PUC 98 8117%
7820%
124-27%*2006 baseline, incomplete/unreliable BMP data for 2005.
Central CoastCentral Coast
Supplier 2005 Base-line
Targets & % Reduction
Calculator Method 1
Method 3
San Luis Obispo 129 116116
10%10%
10320%
1179%
City of Carpenteria 275 237237
14%14%
22020%
11758%
South Coast - 1South Coast - 1Supplier 2005
Base-line
Targets & % Reduction
Calculator Method 1
Method3
City of Corona 244 21811%
19520%
14242%
Walnut Valley WD 194 1779%
15620%
14227%
City of Santa Monica
144 12712%
11520%
1422%
City of Oxnard 128 10915%
10320%
14210%
Helix WD 133 11811%
10620%
1426%
Camrosa WD 377 3458%
30120%
14262%
GSWC -Simi Valley 156 1438%
12520%
1429%
South Coast - 2South Coast - 2Supplier 2005
Base-line
Targets & % ReductionCalculator Method
1Method
3
City of Chino Hills 190 17010%
15220%
14225%
Western MWD 325 28213%
26020%
14256%
Rincon Del Diablo MWD
245 2277%
19620%
14242%
Mesa Consolidated WD
159 1459%
12720%
14211%
City of Anaheim PUD
181 1678%
14520%
14222%
City of Newport Beach
199 18010%
16020%
14229%
City of Seal Beach 158 1449%
12720%
14211%
Rainbow MWD 239 20714%
19220%
20016%
Sacramento RiverSacramento River
Supplier 2005 Base-line
Targets & % Reduction
Calculator Method 1
Method 3
City of Folsom 324 22929%
25920%
16748%
Placer CWA - Retail
270 23413%
21620%
16738%
City of Davis 206 1869%
16520%
16719%
CWS - Oroville 303 25915%
24320%
16745%
San Joaquin RiverSan Joaquin River
Supplier 2005 Base-line
Targets & % Reduction
Calculator Method 1
Method 3
Stockton 297 2748%
23720%
16544%
Tulare LakeTulare Lake
Supplier 2005 Base-line
Targets & % Reduction
Calculator Method 1
Method 3
City of Clovis 250 22311%
20020%
17929%
Summary ResultsSummary Results
Supplier 2005 Base-line
MGD
GPCD Targets & % Reduction
Calculator Method 1
Method 3
20 Random Examples Weighted average* Unweighted average
353 30712.8%12.6%
28220%20%
29117.5%26.4%
All 28 Examples Weighted average* Unweighted average
542 47412.5%12.4%
43420%20%
44717.6%24.2%* Weighted by population.
Additional GPCD Adjustment Additional GPCD Adjustment Required for 20% ReductionRequired for 20% Reduction
BMP SavingsBMP Savings Adjustment Adjustment FactorFactor
Weighted averageWeighted average 12.5%12.5% 7.5%7.5%
Unweighted averageUnweighted average 12.4%12.4% 7.6%7.6%
Note: For all 28 examples.
BMP-based Target v Baseline UseBMP-based Target v Baseline Use
BMP-Based Target v Baseline Use
0%
5%
10%
15%
20%
25%
30%
35%
40%
0 50 100 150 200 250 300 350 400
Baseline Use (GPCD)
BMP-
Base
d Ta
rget
(% o
f Bas
elin
e U
se)
Baseline Use, GPCD
BM
P-b
ased
Tar
get
(%
red
uctio
n in
ba
selin
e)
10 10 Hydrologic Hydrologic RegionsRegions
North Lahontan
South Lahontan
Colorado River
South Coast
Tulare LakeCentral
Coast
San Francisco Bay
North Coast
Sacramento River
San Joaquin River
# of Examples
1
1
40
41
12
0
15
0
Population Distribution of Population Distribution of 28 Examples28 Examples
Hydrologic Region
1
NC
2
SF
3
CC
4
SC
5
SR
6
SJR
7
TL
8
NL
9
SL
10
CR
Total
28 Examples 14 1,109 59 1,610 233 98 90 0 0 0 3,212
Hydrologic Region Total
674 6,405 1,535 19,489 2,902 1,978 2,067 106 784 705 36,645
2005 Population in thousands2005 Population in thousands
