unbiased. Four weekly samples (or a sample collected during each week of operation during the month) of equal mass shall be combined to form the monthly composite sample. The monthly composite sample shall be homogenized and well mixed prior to withdrawal of a sample for analysis. One in twelve composite samples shall be randomly selected for additional analysis of its discreet constituent samples. This information will be used to monitor the homogeneity of the composite.
When measured by the operator or fuel supplier, carbon content shall be determined using the following ASTM method:
For coal and coke, solid biomass-derived fuels, and waste-derived fuels use ASTM 5373-02 (Reapproved 2007).
Operators combusting liquid fuels shall use the following equation to calculate CO2 emissions:
12 CO2 = ∑ Fueln * CCn * 3.664 * 0.001 1 Where: CO2 = carbon dioxide emissions, metric tonnes per year Fueln = volume of fuel combusted in month “n,” gallons CCn = carbon content from fuel analysis for month “n,” kg C per gallon fuel
= conversion factor for carbon to carbon dioxide
= factor to convert kg to metric tonnes
The carbon content shall be measured and recorded monthly. When measured by the operator or fuel supplier, carbon content shall be determined using the following ASTM methods: For petroleum-based liquid fuels and liquid waste-derived fuels, use ASTM D5291-02 (Reapproved 2007) “Standard Test Methods for Instrumental Determination of Carbon, Hydrogen, and Nitrogen in Petroleum Products and Lubricants,” ultimate analysis of oil or computations based on ASTM D3238-95 (Reapproved 2005) and either ASTM D2502-04 or ASTM D2503-92 (Reapproved 2002).