25C - AGMT - OCWD CENTENNIAL PARK

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Section 5 5.7 GREENHOUSE GAS EMISSIONS The following analysis is a summary of Greenhouse Gas Emission Report prepared for the Mid Basin Centennial Park injection Well Project by BonTerra/Psornas in July of 2015. The Greenhouse Gas Emission Report is presented in its entirety in Appendix B. 5.7.1 Affected Environment Greenhouse Gases (GHG) are global Pollutants and are therefore unlike criteria air pollutants and toxic air contaminants, which are pollutants of regional and local concern. While pollutants with localized air quality effects have relatively short atmospheric lifetimes (generally on the order of a few days), GHGs have relatively long atmospheric lifetimes, ranging from one year to several thousand years. Long atmospheric lifetimes allow for GHGs to disperse around the globe, Therefore, GHG effects are global', as opposed to the local and/or regional air quality effects of criteria air pollutant and toxic air contaminants. GHGs, as defined under California's Assembly Bill (AB) 32, which includes; carbon dioxide (CO2), methane (CH4), nitrous oxide (N20), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs),, and sulfur hexafluoride (SF6). Both natural processes and human activities emit greenhouse gases, It is believed by some experts that the presence of greenhouse gases in the atmosphere affects the earth's temperature and that emissions frorn human activities such as electricity production and vehicle use have elevated the concentration of these gases in the atmosphere beyond the level of naturally occurring concentrations, The U.S. contributes approximately 14.7 percent of worldwide GHG emissions, per year; California contributes approximately 1 .0 percent. The most common GHG is G02, which constitutes approximately 84 to 85 percent of all GHG emissions in the U.S. and California- The primary contributors to California GHG emissions are (1 ) transportation; (2) electric power production from both in-state and out-of- state sources; and (3) industrial uses, 5.7.2 Regulatory Framework Federal Regulations The Consolidated Appropriations Act of 2008, passed in December 2007, requires the establishment of mandatory greenhouse gas reporting requirements. On September 22, 2009, the EPA issued the Final Mandatory Reporting of Greenhouse Gases Rule. The rule requires reporting of greenhouse gas emissions frorn large sources and suppliers in the United States, and is intended to collect accurate and timely emissions data to inform future policy decisions. Under the rule, Suppliers of fossil fuels or industrial greenhouse gases, manufacturers of vehicles, and engines, and facilities that emit 25,000 metric tons Mid Basin Centennial Park 6 2 I nf 11 Project Final EIR 5-89 9612 0