Common use of CAISO Hourly NOx Emissions Cost Clause in Contracts

CAISO Hourly NOx Emissions Cost. For each hour, the CAISO Hourly NOx Emissions Cost for the Billable MWh is calculated in accordance with Equation C1-14. Equation C1-14 CAISO Hourly Nox Emissions Cost ($/hr) = (5­ 10-4) ­ Hourly Nox Emissions (lbs/hr) ­ NOx Emissions Fee ($/ton) ­ Billable MWh Hourly Metered Total Net Generation Where:  (5 ( 10-4) is the conversion factor from lbs to tons.  Hourly NOx Emissions is calculated in accordance with Equation C1-13.  NOx Emissions Fee is obtained from Table III of SCAQMD Rule 301(e). The fee is dependent upon the Cumulative Tons of Pollutant (NOx), which is calculated in accordance with Equation C1-15. The Cumulative Tons of Pollutant is reset to zero each July 1st. Equation C1-15 Cumulative Tons of Pollutant (tons/hr) = Tons of Pollutant From the prior July 1st to the Previous Hour + Tons of Pollutant For Current Hour Where:  Tons of Pollutant for Current Hour is in accordance with Equation C1-16. Equation C1-16 Tons of Pollutant for Current Hour (tons/hr) = (4.76  10-7) ­ (AX3 + BX2 + CX + D) ­ Pollutant Emissions Amount for Natural Gas Where:  (4.76 ­ 10-7) is the conversion factor from lbs. to tons (1 ton/2000 lbs.) and from mmcf to MMBtu (1 mmcf/1050 MMBtu).  X is the Hourly Metered Total Net Generation, MWh.  Coefficients A, B, C, and D are the coefficients of the hourly heat rate curve given in Table C1-16 for each Unit.

CAISO Hourly NOx Emissions Cost. For each hour, the CAISO Hourly NOx Emissions Cost for the Billable MWh is calculated in accordance with Equation C1-14. Equation C1-14 CAISO Hourly Nox Emissions Cost ($/hr) = (5­ 10-4) ­ Hourly Nox Emissions (lbs/hr) ­ NOx Emissions Fee ($/ton) ­ Billable MWh Hourly Metered Total Net Generation Where:  (5 ( 10-4) is the conversion factor from lbs to tons.  Hourly NOx Emissions is calculated in accordance with Equation C1-13.  NOx Emissions Fee is obtained from Table III of SCAQMD Rule 301(e). The fee is dependent upon the Cumulative Tons of Pollutant (NOx), which is calculated in accordance with Equation C1-15. The Cumulative Tons of Pollutant is reset to zero each July 1st. Equation C1-15 Cumulative Tons of Pollutant (tons/hr) = Tons of Pollutant From the prior July 1st to the Previous Hour + Tons of Pollutant For Current Hour Where:  Tons of Pollutant for Current Hour is in accordance with Equation C1-16. Equation C1-16 Tons of Pollutant for Current Hour (tons/hr) = (4.76  10-7) ­ (AX3 + BX2 + CX + D) ­ Pollutant Emissions Amount for Natural Gas Where:  (4.76 ­ 10-7) is the conversion factor from lbs. to tons (1 ton/2000 lbs.) and from mmcf to MMBtu (1 mmcf/1050 MMBtu).  X is the Hourly Metered Total Net Generation, MWh.  Coefficients A, B, C, and D are the coefficients of the hourly heat rate curve given in Table C1-16 for each Unit.. Table C1-16 Description of Unit A B C ‍ Pollutant Emissions Amount For Natural Gas is the applicable pollutant from SCAQMD General Instruction Book (for the latest year), Annual Emissions Reporting Program, Appendix A - Common Emission Factors For Combustion Equipment, Table 1 - Common Emission Factors For Combustion Equipment for Forms B1 and B1U.