SUBSCRIBER NOTE: Natural gas assessment rationale corrected for Feb 12

Due to an internal error, the incorrect Platts Natural Gas Assessment Rationale ran in the February 12, 2019 editions of Gas Daily and Platts Energy Trader.

The rationale should read:

These locations were assessed by Platts and deviated from the standard volume weighted average methodology in the following ways:

1. Trunkline WLA: Price of $2.61/MMBtu was assessed flat to Trunkline ELA based on recent daily gas trading and verified by ICE bid/offer activity.

2. TETCO M-1 30: Price of $2.545/MMBtu was assessed at a 6-cent discount to TX Eastern STX based on recent daily gas trading and verified by ICE bid/offer activity.

3. NGPL STX: Price of $2.595/MMBtu was assessed at a 4-cent premium to NGPL Texok Zn based on recent daily gas trading and verified by ICE bid/offer activity.

All other Platts daily indices are based upon trade data reported to Platts by market participants and trade data submitted by Intercontinental Exchange. The indices are calculated using detailed transaction level data from these providers. Platts editors screen the data for outliers that may be further examined and potentially removed. A volume weighted average is then calculated from the remaining set of data. For more details on this methodology please see our North American Natural Gas Methodology and Specifications Guide on Platts.com, located at:

http://www.platts.com/IM.Platts.Content/MethodologyReferences/MethodologySpec s/na_gas_methodology.pdf

Questions may be directed to Arsalan Syed at 713-655-2217 or arsalan.syed@spglobal.com