County of San Diego 2005/2006 Greenhouse Gas Emissions Inventory

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vehicles with air conditioning or refrigeration equipment use refrigerants that can leak from the vehicle. Emissions from vehicles and mobile equipment compose a significant portion of emissions within most local governments. In 2006, the County of San Diego operated a vehicle fleet with nearly 3,000 vehicles, ranging from small passenger cars to street sweepers and major construction vehicles. The County’s vehicle fleet performed a number of essential services, from public safety and emergency response to transporting County inmates. In 2006, 40 percent of the fleet was dedicated to the sheriff’s departments, while the Department of Public Works, the District Attorney’s Office and the Health and Human Services Department also contributed significantly to the County’s fleet. Table 3.8: Vehicle Fleet and Mobile Equipment Emissions by Department Department Greenhouse Gas Emissions (metric tons CO 2 e) Percent of All Mobile Emissions Gasoline Consumption (gal) Diesel Consumption (gal) Cost Sheriff 10,673 46% 1,033,931 116,903 $3,246,701 DPW 2,400 10% 174,250 80,241 $723,947 District Attorney 1,791 8% 197,480 147 $555,346 Probation 1,500 6% 159,308 4,295 $460,195 HHSA 1,248 5% 131,904 4,736 $384,478 DPLU 992 4% 174,250 42,919 $296,980 Parks & Rec. 884 4% 83,663 12,026 $270,208 Other 3,681 16% 282,739 7,516 $1,134,429 TOTAL* 23,168 100% 2,237,523 268,782 $7,072,284 *Emissions from leaked refrigerants within the vehicle fleet are not included in this chart. These emissions totaled 868 metric tons of CO 2 e. In 2006, San Diego emitted approximately 23,000 metric tons of CO 2 e as a result of the combustion of fuels to power the County’s vehicle fleet. Table 3.9 shows estimated costs associated with the activities that generated these emissions, and Figure 3.7 depicts 2006 emissions per department. Vehicles in the sheriff’s departments were the largest emitters of greenhouse gases, representing nearly 50 percent of total vehicle fleet emissions. Of all mobile emissions calculated, 85 percent came from the consumption of gasoline, 11 percent came from the combustion of diesel, and the remaining 4 percent came from leaked mobile refrigerants 13 . The County spent approximately $7 million in 2006 on the fuels that were the cause of these emissions. Please refer to Figure 3.7 on the next page for an illustration of fleet emissions by department. 13 The LGOP Alternative Method (Mobile Fugitive Emissions) was used to estimate emissions from leaked mobile refrigerants. This amount is likely a significant overestimate but in line with LGOP methods. 2005/2006 San Diego County Greenhouse Gas Emissions Inventory 26
Figure 3.6: Emissions from Mobile Sources 12,000 10,000 8,000 Metric Tons CO2e 6,000 4,000 2,000 0 Sheriff DPW District Attorney Probation HHSA DPLU Parks & Rec. Other 3.4.7 Government-Generated Solid Waste Many local government operations generate solid waste, much of which is eventually sent to a landfill. Typical sources of waste in local government operations include paper and food waste from offices and facilities, construction waste from public works, and plant debris from parks departments. Organic materials in governmentgenerated solid waste (including paper, food scraps, plant debris, textiles, wood waste, etc.) generate methane as they decay in the anaerobic environment of a landfill. An estimated 75 percent of this methane is routinely captured via landfill gas collection systems; 14 however, a portion escapes into the atmosphere, contributing to the greenhouse 14 This is a default methane collection rate per LGOP. This rate can vary from 0 to 99 percent based upon the presence and extent of a landfill gas collection system at the landfill/s where the waste is disposed. Most commonly, captured methane gas is flared into the atmosphere, which 2005/2006 San Diego County Greenhouse Gas Emissions Inventory 27
Page 1 and 2: County of San Diego 2005/2006 Green
Page 3 and 4: The San Diego Foundation Bob Kelly,
Page 5 and 6: 4.2 Community Inventory Detail by S
Page 7 and 8: List of Tables and Figures List of
Page 9 and 10: \ Executive Summary The County of S
Page 11 and 12: educing energy costs while also mit
Page 13 and 14: Electricity and natural gas consump
Page 15 and 16: Introduction Local governments play
Page 17 and 18: 1.2 Purpose of Inventory The object
Page 19 and 20: • SB 375 (2008) revises the proce
Page 21 and 22: Section Two: Methodology 2005/2006
Page 23 and 24: 2.1 Greenhouse Gases According to b
Page 25 and 26: Scope 2: Indirect emissions associa
Page 27 and 28: Third, it is very difficult to use
Page 29 and 30: Government Operations Inventory Res
Page 31 and 32: Employee commuting is an important
Page 33 and 34: efrigeration equipment in buildings
Page 35 and 36: estimated electricity consumption a
Page 37: Gas CH 4 Table 3.7: Solid Waste Fac
Page 41 and 42: 4.1 Community Inventory Summary 200
Page 43 and 44: 4.1.1 Summary by Scope As shown in
Page 45 and 46: Figure 4.3 Community Emissions Summ
Page 47 and 48: 4.2.2 Commercial / Industrial Secto
Page 49 and 50: Table 4.6: Community-Generated Soli
Page 51 and 52: County 2005 VMT to estimate 2020 tr
Page 53 and 54: Conclusion By participating in the
Page 55 and 56: 5.1.3 Department Targets If possibl
Page 57 and 58: Appendices 2005/2006 San Diego Coun
Page 59 and 60: Also, while LGOP standardizes inven
Page 61 and 62: This inventory has used the recomme
Page 63 and 64: Appendix B: LGOP Standard Report Lo
Page 65 and 66: VEHICLE FLEET SCOPE 1 CO 2 e CO 2 C
Page 67 and 68: SOLID WASTE FACILITIES (Chapters 6
Page 69 and 70: SOLID WASTE FACILITIES (Chapters 6
Page 71 and 72: Most landfills in the San Diego reg
Page 73 and 74: Sector Emissions Source Sector Emis
Page 75 and 76: D.4 On-road Transportation and Off-
Page 77 and 78: Appendix E: Conducting a Monitoring
Page 79 and 80: ecords of vehicle miles traveled by
Page 81: charts and graphs tool provided by

County of San Diego 2005/2006 Greenhouse Gas Emissions Inventory

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