Sustainability and Energy Action Plan
Grants Pass · Page 142 of 183 · Adopted 2023-05-17
APPENDIX IV: METHODOLOGY
GRANTS PASS SUSTAINABILITY AND ENERGY ACTION PLAN
EMISSIONS FROM ENERGY USAGE AND FUEL CONSUMPTION (continued)
Emissions related to solid waste were calculated using the EPA WARM Calculator Tool based
on 2021 base year volumes of waste disposal using disposal company bills. For the base year,
this was calculated to be 469 Metric Tons of Carbon Dioxide Equivalent. This amount was
distributed to city operations based on the amount each operation was billed for disposal
services. The solid waste amount is assumed to increase with population.
Emissions from the water restoration treatment process were calculated using the method
described in the LGOP .Based upon expert consultation, it was determined that only Equation
10.1 of that method applies to Grants Pass operations (flaring of methane gas produced by the
primary digester). Water restoration emissions are assumed to increase with population.
The emissions sequestered (removed) by urban forest within land owned by Grants Pass
(primarily parks) was determined using the methods described in the LGOP using values
measured directly from City GIS mapping tools. The total City -owned land area was measured
to be 4.926 square kilometers, of which 25.49% was determined to be forested.
Emissions due to employee commute were calculated using an employee count of 221 for
thebase year and applying the guidelines described in the LGOP . Values for number of trips
perday, and miles per trip, were extrapolated from an employee survey conducted in March
2023; 130 employees responded. Employee counts were assumed to increase with population.
221 employee vehicles running 2.4 trips per employee per day
7.5 miles per trip
250 workdays per year
21.6 miles per gallon for employee vehicles
140
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