Production, consumption and storage numbers largely affect natural gas price trends.
To ensure no one gets an advantage, the EIA employs spy practices in its preparation.
The natural gas storage numbers are collected on a computer that is not connected to the Internet.
Thursday mornings, the data is copied securely onto a flash drive, which is then walked to a different computer on a different floor for release at the precise moment.
While the administration has worked to avoid tipping its hand to those gambling most closely on the weekly numbers, Sieminski has advice for anyone else.
“If you want to buy gas or make a hedge, I suggest you do business with somebody other than at 10:30 on Thursday,” he said.