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Item ll.b.
Central Contra Costa Sanitary District
March 15, 2018
TO: HONORABLE BOARD OF DIRECTORS
FROM: CLINT SHIMA, SENIOR ENGINEER
REVIEWED BY: NEIL MEYER, PLANT MAINTENANCE DIVISION MANAGER
ANN SASAKI, DEPUTY GENERAL MANAGER
ROGER S. BAILEY, GENERAL MANAGER
SUBJECT: RECEIVE SUMMARY OF 2017 ENERGY USAGE
Senior Engineer Clint Shima will present a summary of Central San's 2017 energy usage. The
presentation will include the following:
• Treatment Plant Usage - 2016 versus 2017
• Monthly Usage Statistics
• General Energy Information
Strategic Plan re-In
GOAL SIX: Embrace Technology, Innovation and Environmental Sustainability
Strategy 3- Encourage the Review and Testing of Promising and Leading Technology, Strategy 4- Reduce Reliance on
Non-Renewable Energy
ATTACHMENTS:
Summary of 2017 Energy Usage
March 15, 2018 Regular Board Meeting Agenda Packet- Page 230 of 275
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f SUMMARY OF THE DISTRICT'S
2017 ENERGY USAGE
Board of Directors Meeting
xMarch 15, 2018
Clint Shima, P.E.
Senior Engineer
Plant Maintenance Division
OVERVIEW
Central San Monthly Energy Usage
Board Updated Quarterly
Treatment Plant 2016 versus 2017
Monthly Usage Statistics
General Energy Information ,
• Solar Panels
s
.«
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March 15, 2018 Regular Board Meeting Agenda Packet- Page 231 of 275
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TREATMENT PLANT 2016 VERSUS 2017
2016 2017
Natural Gas
(NG): 400,000 MMBtu $1.8 M 398,000 MMBtu $1.8 M
Landfill Gas 91,000 MMBtu $314k 89,000 MMBtu $308k
(LFG):
Total: 491,000 MMBtu $2.1 M 487,000 MMBtu $2.1 M
Electricity 4,734,000 kWh $1.0 M 6,606,000 kWh $1.3 M
(PG&E):
(Cogen): 19,746,000 kWh 19,679,000 kWh
Total: 24,481,000 kWh 26,285,000 kWh
MONTHLY USAGE STATISTICS
• Total Costs (Natural Gas, Landfill Gas and Electricity)
o Range: $280,000 to $389,000
o Average: $338,000
Average Cost / MG: $269.03
Average kWh / MG: 1,898
Area Cost Breakdown
o Treatment Plant: 81% — 88%
o Pumping Stations: 10% — 18%
Collection System Operations Facility: < 1%
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March 15, 2018 Regular Board Meeting Agenda Packet- Page 232 of 275
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GENERAL ENERGY INFORMATION
Reduced cogeneration led to increased import from PG&E
Carbon monoxide catalyst and evaporative cooler
installed in November 2017
Back to normal operation
PG&E
o Gas transmission and storage rate case
o If passes, rate increase starting January 1, 2019
Energy Optimization
PG&E large integrated audit
Battery storage
-Ai,
GENERAL ENERGY INFORMATION
NG 2018 Average: $3.24/MMBtu
NG 2019 Average: $3.04/MMBtu
Landfill gas supply is decreasing
2017 Greenhouse Gas: Below 25,000 CO2e MT
Renewable Energy: -25%
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March 15, 2018 Regular Board Meeting Agenda Packet- Page 233 of 275
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SOLAR PAN
INSTALLED AT HOUSEHOLD HAZARDOUS WASTE FACILITY AND
COLLECTION SYSTEMS OPERATIONS FACILITY
Year 1 Estimate: 246 MWh
2017 Produced: 288 MWh
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March 15, 2018 Regular Board Meeting Agenda Packet- Page 234 of 275