It is good practice to document and archive all information required to produce the national emissions inventory estimates. Below are general notes that apply to reporting and documentation of emissions and emission reductions from lime production followed by specific information to be reported for the individual tiers.
• If an inventory compiler is reporting on CO2 recovery from sugar refining, precipitated calcium carbonate or water softening under Category 2H, detailed information should be reported on the methods used for calculating emissions recovered. Both emissions and emission reductions should be reported separately; it is not considered good practice to report only net emissions from lime production. In addition, documentation should be provided to illustrate that emission reductions from recarbonation are only reported in the year in which recarbonation occurs (see 2.3.1 above).
• Regardless of the method implemented, inventory compilers should document procedures undertaken to ensure that both marketed and non-marketed lime production are reported (see discussion in Section 126.96.36.199, Completeness).
The Tier 1 approach is methodologically the same as Tier 2 except that default values may be used instead of country-specific information to estimate the various parameters. Documentation for Tier 1, therefore, follows Tier 2 below except a clear indication should be made as to where default values are used.
Tier 2 documentation should include a discussion of the types of lime produced in the country (including hydrated lime) and how that determination was made (collection of sales data, collection of plant specific consumption data, etc.) The procedures used to identify the CaO and/or CaO-MgO content of lime, as well as non-carbonate feeds to lime kiln also should be reported.
Reporting and documentation for Tier 3 for lime production is the same as the Tier 3 method outlined above for cement production, with one minor difference. Instead of collecting information on CKD, data on the quantity and fraction of calcination achieved of LKD should be collected. All underlying information should be documented and reported, it is not considered good practice to report just final emissions estimates.
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