Orange County NC Website
Browse       Search
qr�— MMLWTI�, � <br /> 111 <br /> EMPLOYEE COMMUTE <br /> Data on employee commutes was provided by the 2019 commuting survey of Orange <br /> County employees. This survey asked employees about their commuting habits, and <br /> total annual Vehicle Miles Traveled (VMT) was extrapolated from the responses. While <br /> the survey results did not include total mileage, it was possible to calculate this by <br /> multiplying the average miles per commute by the average workdays per week and then <br /> calculating the yearly VMT using the average number of working weeks in a year,which is <br /> 49.31 This yields the total annual commuting VMT for Orange County.The emissions were <br /> then calculated using the US Community Protocol emission factors of CO2 Emissions <br /> Factor 0.07024 MT/MMBtu, CH4 Emissions Factor 1.8300 x10-8 MT/Mile, and a N20 <br /> Emissions Factor 8.3 x10-9 MT/Mile. <br /> WATER AND WASTEWATER <br /> The emissions from water and wastewater operations for Orange County's municipal <br /> activities were calculated in the same manner as in the community inventory.32 As OWASA <br /> is a municipal operation, its emissions should be included under those from the County. <br /> The difference between the two sectors is that the municipal inventory does not include <br /> emissions from septic systems. <br /> FUGITIVE EMISSIONS <br /> These are calculated in the same way as the community inventory. Fugitive emissions <br /> were calculated by usage data summed from natural gas used by the County operations. <br /> Usage was multiplied by a leakage factor of an industry standard recommended by the <br /> U.S. Community Protocol. 33 The leakage emissions are multiplied by an emissions factor <br /> of 6.1939x10-5 MT CH4/MMBtu natural gas used, and CO2 emission factor of 6.6316 x 10-5 <br /> MT CO2/MMBtu natural gas used. <br /> 31 https://www.bls.gov/news.release/pdf/atus.pdf <br /> 32 U.S.Community Protocol for Accounting and Reporting of Greenhouse Gas Emissions Appendix F: <br /> Wastewater and Water Emission Activities and Sources <br /> 33 https://www.edf.org/sites/default/files/US-Natural-Gas-Leakage-Model-User-Guide.pdf <br /> 20 ORANGE COUNTY, NC • APPENDICES <br />