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Interpretation Response #PI-20-0010

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: Counsel for MarkWest

Individual Name: Mr. Keith J. Coyle

Location State: DC Country: US

View the Interpretation Document

Response text:

Mr. Keith J. Coyle
Babst, Calland, Clements and Zomnir, P.C.
Counsel for MarkWest
505 9th Street, NW, Suite 700
Washington, DC 20004

Dear Mr. Coyle:

In a letter to the Pipeline and Hazardous Materials Safety Administration (PHMSA), dated April 27, 2020, MarkWest requested that PHMSA clarify a statement in a supplemental interpretation issued by the agency on April 7, 2020. In the supplemental interpretation, PHMSA confirmed an earlier interpretation dated October 15, 2019, that pipelines delivering gas to MarkWest's gas processing plant were transmission lines. PHMSA described the pipelines as delivering off-gas from refineries to the MarkWest Javelina processing plant, where the plant "uses the off-gas as chemical and plastic feedstocks and sends residue gas back to the refineries" for their use as fuel. The interpretation noted that the plant processed approximately 28,000 bbl/day of liquid hydrocarbons in this manner. PHMSA stated further that it disagreed with Markwest's opinion that the gas processing plant is not a large volume customer for purposes of the transmission line definition in § 192.3.

In its April 27, 2020 letter, MarkWest asserted that during a November 19, 2019, meeting with PHMSA, the company indicated that none of the refinery off-gas received at the plant is used as a feedstock for other products, but rather MarkWest processes the off-gas to create pipeline-quality gas for delivery to another downstream customer. Unless something has significantly changed in its processing of the feedstock into chemical feedstocks, this assertion appears to be inconsistent with information MarkWest provided to PHMSA on November 14, 2016, which explained in more detail how the Javelina plant separates off-gas into valuable components—as the off-gas contains light hydrocarbon components that are more valuable as chemical and plastic feedstocks. In addition, the information provided by MarkWest on November 14, 2016, appears to be consistent with information provided to PHMSA by the Texas Railroad Commission. The products produced include propane, butane, ethane, and other NGLs. In addition, PHMSA notes that the Javelina plant receives up to 142 mmscfd of off-gas from refineries, a volume consistent with, if not exceeding, volumes received by large volume customers. Accordingly, PHMSA finds no reason to modify its April 7, 2020, interpretation.

Finally, as this pipeline is regulated by the Texas Railroad Commission, PHMSA encourages MarkWest to work directly with its regulator to resolve any future issues.


John A. Gale
Director, Office of Standards
and Rulemaking

Regulation Sections

Section Subject
192.3 Definitions