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'i. Greenhouse Gas Emissions Technical Report Mountain House Neighborhoods K& L,San Joaquin County,California i n Project Shea Homes provided water demand and wastewater generat o estimates for the J , I which are shown in Appendices A and B, Section 7.30 t Project and Baseline emissions were calculated using the same assumptions, Including the assumption that the wastewater treatment plant uses an aerobic sequential batch reactor that l does not generate any methane. However, Project emissions were calculated using a lower I ! carbon-intensity electricity emission factor to reflect the 20% RPS mentioned above. The resultant Project and Baseline water GHG emissions are shown in Table 1 with supporting F1 information in Appendices A and B, Section 7. 3.3.6 Area Sources (Landscaping Equipment) This section discusses GHG emissions from area sources at the Project. The area source l emissions considered for this analysis are from landscaping fuel combustion sources such as lawn mowers. GHG emissions due to natural gas combustion are excluded from this section since they are covered inresidential emissions, as discussed earlier. Project and Baseline-emissions were calculated using the same CaIEEMod defaults based upon. the land-uses that will be part of the Project. Note that in 2020, the CalEEMod defaults reflect more fuel-efficient landscaping equipment. The resultant Project and Baseline area GHG emissions are shown in Table 1 with supporting information in Appendices A and B, Section S. F1 3.3.7 Solid Waste The residents at the development will generate solid waste. A large percentage of this waste will be diverted from landfills by waste generation reduction, recycling, and/or composting. The remainder of the waste not diverted will,be disposed of at a landfill. Landfills emit GHG emissions associated with the anaerobic breakdown of material. CalEEMod's solid waste module determines the GHG emissions associated with disposal of solid waste into landfills based upon the land-use types at the development. Project and Baseline emissions were calculated using the same assumptions, as shown in J 9 P Appendices A and B, Section 8. PThe resultant Project and Baseline solid waste GHG emissions are shown in Table 1 with supporting information in Appendices A and B, Section 8. !J I r 30 All water use was attributed to low rise apartments because an actual water demand breakout by building type was unavailable at the time of this analysis, and therefore ENVIRON did not attempt to match the water-use to specific housing types. This is neither believed to over or underestimate the emissions associated with water use. k 03-25856A 13 E N V I R O N tA