Figure: 30 TAC §117.3123(b)

The equation for calculating the 30-day rolling average nitrogen oxides source cap in tons per day for all cement kilns located at an account

Cap8hour        =          total allowable NOX emissions from all cement kilns located at an account, tons per day, 30-day rolling average basis;

KD                  =          1.7 pounds NOX per ton of clinker for dry preheater-precalciner or precalciner kilns;

KW                 =          3.4 pounds NOX per ton of clinker for long wet kilns;

ND                  =          the average annual production in tons of clinker plus one standard deviation for the calendar years 2003, 2004, and 2005, as reported to the commission’s Industrial Emissions Assessment Section, from all dry preheater-precalciner or precalciner kilns located at the account; and

NW                 =          the average annual production in tons of clinker plus one standard deviation for the calendar years 2003, 2004, and 2005, as reported to the commission’s Industrial Emissions Assessment Section, from all long wet kilns located at the account.