Energy surcharges will be applied based on a rolling three-month forward average of the NYMEX Henry Hub Index for natural gas as of the 15th day of the month preceding each calendar quarter. If the 15th of the month falls on a weekend or holiday, the close on the last trading day prior to the 15th will be used for this calculation.
The table below illustrates the relationship between the natural gas price and the soda ash surcharge:
| NYMEX Henry Hub ($/MMBTU) | Soda Ash Energy Surcharge ($/ST) |
|---|---|
| Less than $5.00/MMBTU | $0.00 |
| $5.00 – $5.99 | $1.50 |
| $6.00 – $6.99 | $3.00 |
| $7.00 – $7.99 | $4.50 |
| Above $7.99/MMBTU | Surcharge increases $1.50/ST for each $1.00/MMBTU increment change in the Index |
Note: Effective April 1, 2023, Energy Surcharge = $0.00/ST
