HomeMy WebLinkAbout12. (Handout) Revised Presentation
Item 12. (Revised)
(Handout)
C ENTRAL S AN’S
L ANDFILL G AS U SAGE
Board of Directors Meeting
October 4, 2018
Clint Shima, P.E.
Senior Engineer
Plant Maintenance Division
O VERVIEW
Θ Central San’s Landfill Gas Usage
Θ Proposed Landfill Gas Agreement
Θ Annual Landfill Gas Usage Chart
Θ Greenhouse Gas
Θ Staff Recommendations
2
1
C ENTRAL S AN’S
L ANDFILL G AS U SAGE
Θ Began using landfill gas in 1983
Θ Supplied by Bulldog Gas & Power, LLC
Θ Historically, it was mainly used in multiple hearth
furnaces, and at times for auxiliary boilers
3
P LANT G AS U SAGE
Cogen:1000MillionBritish
ThermalUnitsperdayof
NaturalGas(MMBTU/dayNG)
Furnace:275MillionBritish
ThermalUnitsperdayof
LandfillGas(MMBTU/dayLFG)
Approx.400500thousand
AuxBoilers:225MMBTU/dayNG
cubicfeetperday(kcfd)
4
2
R ENEWABLE E NERGY
(ASOF J ULY 2018)
LandfillGas
AnthropogenicGreenhouseGas(GHG)Emissions
RenewableEnergy
7,907MMBTU
MetricTonCarbonDioxideEquivalent(MTCO)*
Profile
2e
15%
25000
RecoveredWasteHeat
6,038MMBTU
20000
12%
15000
13,558
Solar
116MMBTUequivalent
10000
CO2e
TotalNonRenewable
0.22%
38,583MillionBritish
MT
ThermalUnits
5000
(MMBTU)
73%
MCERenewables
27MMBTUequivalent
0
0.05%
5000
*(CalculatedonacalendarbasisJan.1toDec.31)
5
P ROPOSED L ANDFILL G AS
A GREEMENT
Θ Terms: Five years
o October2018 to September30, 2023
Θ Pricing:
o Previous agreement
25 percent discount versus natural gas pricing
Minimum $2.60 and Maximum of $4.60 per decatherm
o New agreement pricing structure
Landfill Gas Price: Minimum $3 and Maximum of $6 per decatherm
10 percent discount until October 2019 (first year)
5 percent discount with at least 400 thousand cubic feet per day
10 percent discount if at least 500 thousand cubic feet per day
Θ Central San to maintain onsite landfill gas measuring devices
Θ Other terms and conditions remain the same as existing agreement
6
3
P RICEOF L ANDFILL G AS
LandfillGasPriceperdecatherm
$6.00
$5.11
LFGprices(old)
$4.80
$5.00
$4.63
$4.60
$4.59
$4.49
$4.24
$4.10
$3.94
$4.00
$3.75
$3.71
$3.63
$3.55
$3.54
$3.47
$3.45$3.45
$3.44
$3.37
$3.21
$3.00
$2.69
$2.00
$1.00
$
123456789101112131415161718192021
7
A NNUAL L ANDFILL G AS U SAGE
LandfillGasUsage20142018YearlyComparison
12000
10000
8000
2014
2015
6000
(Decatherms)
2016
Use
2017
LFG
2018
4000
2000
0
NovJanMarAprJunAugSepNovDecFeb
Month
8
4
G REENHOUSE G AS
Θ Landfill gas usage ensures that the Treatment
Plant’s anthropogenic greenhouse gas emissions
remain below the Cap and Trade Program’s
inclusion threshold of 25,000 metric tons of
carbon dioxide
Θ Landfill gas supply has been stable and
Bulldog Gas & Power, LLC, expects it to remain
stable for next ten to fifteen years
9
S TAFF R ECOMMENDATION
Θ Authorize the General Manager to sign a five-year
agreement with Bulldog Gas & Power, LLCto
purchase landfill gas
10
5
Q UESTIONS
11
6