Data Summary of Municipal Solid Waste Management Alternatives. Volume 1: Report Text Page: 84 of 216
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1. Recent compliance test data were used whenever possible to certify air
emissions from combustors; all dioxin/furan estimates are derived in
accordance with the U.S. Environmental Protection Agency's (EPA's)
requirements for Total PCDD/PCDF measurements; for leachate composition,
preference was given to data based on sites that follow appropriate quality
assurance/quality control procedures.
2. When only data from secondary sources were available, at least two sources
were sought (although not always found); comparing data from different
sources proved to be a valuable method for determining which values were
representative. Authors of reports were sometimes questioned about
3. When no published data were found, information was sought through personal
communications with current users of the technology (e.g., results of a
program for curbside collection of yard waste were provided by a community
that operates such a program).
4. When data based on assumptions were used to calculate a given input or
output, the "reasonableness" of the assumptions was confirmed by
knowledgeable researchers. Those researchers generally favored data from
actual operations over data derived from models, although models of landfill
performance were generally well regarded.
Estimates that are based on assumptions, limited data, or ambiguous data are printed in
italics in the basic worksheets for individual technologies. Data calculated from those original
estimates, however, such as the estimates presented for the various integrated strategies, do not
appear in italics.
Although specific assumptions and sources of data are identified in the footnotes on the
basic worksheets, two important general comments should be noted:
1. The data base expresses energy for transportation in British thermal units
(Btus). The transportation energy estimates are based on the Btu value of the
fuel and the mileage for each type of truck. Estimates of transportation
emissions are derived from prevailing regulatory standards. However, the
regulatory standards are based on operations that involve many fewer stops
and starts than are required for collecting MSW, and the standard truck
engines use no power to operate rams and lifts. Therefore, emissions four
times as large as the regulatory limits were assumed for the study.
2. Estimates of routing miles, truck loadings, and mileage for collection and
transport are based on the experience of one community-Palo Alto,
California (population 57,000). Palo Alto is an affluent community that has
had an aggressive curbside recycling program since 1978. A year-round
curbside compost collection program was initiated in 1990.
3. Estimates of electricity used in a process are reported in Btus required to
generate the electricity in an efficient and up-to-date fossil-fuel-fired plant.
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SRI International. Data Summary of Municipal Solid Waste Management Alternatives. Volume 1: Report Text, report, October 1992; Golden, Colorado. (https://digital.library.unt.edu/ark:/67531/metadc1310776/m1/84/: accessed May 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.