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Greenhouse Gas Emissions Technical Report Mountain House Neighborhoods K& L, San Joaquin County, California . The resultant Project and Baseline residential energy GHG emissions are shown in Table 1 with supporting information provided in Appendix A, Section 5. 3.3.3 Non-Residential Buildings Energy Use To estimate GHG emissions for the Project, ENVIRON used CalEEMod, which relies upon the most recent Commercial End Use Survey (CEUS) conducted by the California Energy Commission (CEC).28 Project emissions have been calculated using a MID emission factor that accounts for the 20% RPS required by 2010, as discussed earlier. ENVIRON understands-that SJVAPCD is still in the process of developing baseline GHG metrics for commercial projects. In the absence of reliable baseline commercial GHG metrics from SJVAPCD, ENVIRON applied the same percentage reduction to the non-residential Baseline energy usage as was estimated for the residential energy usage using SJVAPCD baseline energy metrics.29 Based upon the Project's residential GHG savings over the Baseline, ENVIRON estimated a reduction of emissions of approximately 53% for natural gas: and 30% for electricity for non-residential energy use compared to Baseline. The resultant Project and Baseline GHG emissions associated with non-residential energy usage are shown in Table 1 with supporting information in Table 2 and Appendix A, Section 5. 3.3.4 Recreational Facilities Energy Use Recreational facilities at the Project will include a 3,750 square foot outdoor swimming pool. To estimate the energy usage with the swimming pool, ENVIRON obtained average energy consumption of filter pumps and water heaters from a study conducted in Oakland, California;) and then scaled the energy consumption to reflect the pool size at the Project. The energy usage was also scaled to account for the higher average ambient temperature in Tracy compared to the study area and an assumed greater efficiency of new pool heaters. Shea Homes has committed to heat the pool using solar heating; thus, for the Project scenario, natural gas usage is replaced by solar heating. The resultant Project and Baseline pool energy GHG emissions are shown in Table 1 with supporting calculations and references in Tables f, 7, and B. 3.3.5 Water Supply, Treatment and Distribution This section describes the calculation of indirect emissions from the production of electricity to convey, treat and distribute water and wastewater. The amount of electricity required to treat and supply water depends on the volume of water involved as well as the sources of the water. 28 California Energy Commission.2006. California Commercial End-Use Survey. Prepared by Kema Inc. Available at: http://www.energy.ca.gov/ceus/ G zs The percentage reduction between Baseline and Project residential energy usage was decreased slightly to conservatively remove any credit obtained from installing EnergyStar appliances, which may not be included in commercial spaces. i 03-25858A 12 EN V I R O 4