45-Day U.S. EPA Review Required Before Permit Renewal Is Granted

The Delaware Department of Natural Resources and Environmental Control has developed a proposed air pollution permit renewal for the Delaware City Refining Company (DCRC). DNREC will submit the proposed federal Clean Air Act (CAA) Title V major source air pollution permit renewal to the U.S. Environmental Protection Agency (EPA) for a 45-day EPA review period before DNREC Secretary Shawn M. Garvin can grant the final air permit for DCRC’s Delaware City refinery.

“It is important to facilities to have up-to-date permits to operate under because the permit documents how they must operate to remain in compliance with applicable air regulations,” Secretary Garvin said after approving DCRC’s permit application that led to DNREC’s development of the proposed DCRC CAA Title V permit renewal.

DNREC held a public hearing on July 14, 2020 for DCRC’s draft Title V air pollution permit renewal, with comments accepted through July 31, 2020. The proposed permit renewal has incorporated applicable requirements of Delaware Air Regulation 1102 permits for the refinery’s Ethanol Marketing Project; elimination of the maximum data capture requirements from the crude nitrogen oxides (NOx) continuous emission monitoring systems (CEMS); incorporation of requirements from a consent decree issued to a previous owner of the facility in “United States of America et al., v. Motiva Enterprises LLC, No. H-01-0978”; replacement of the EPA’s Tanks 4.09 requirement with the Tanks ESP Pro Version; and modification of short-term NOx limits per the July 2019 settlement agreement between DNREC and DCRC.

The Department received extensive comments on the draft permit renewal and responded to the comments in a technical response memo (TRM) from the DNREC Division of Air Quality. The TRM is posted as an attachment to the hearing officer’s report with the DNREC’s Secretary Order at https://dnrec.alpha.delaware.gov/secretarys-orders/permitting/. The TRM also discusses revisions to be made to the draft permit renewal as a result of comments the Department received. Information presented at the Delaware City Refining Company public hearing and comments received at the hearing and during the public comment period can be found at dnrec.delaware.gov.

Upon receipt of DNREC’s proposed Title V permit renewal for DCRC, the U.S. EPA will begin reviewing it. Questions about the EPA’s review process can be directed to Mary Cate Opila, Air Permits Branch Chief, EPA Region III, email: opila.marycate@epa.gov.

About DNREC
The Delaware Department of Natural Resources and Environmental Control protects and manages the state’s natural resources, protects public health, provides outdoor recreational opportunities, and educates Delawareans about the environment. The DNREC Division of Air Quality monitors and regulates all emissions to the air. For more information, visit the website and connect with @DelawareDNREC on Facebook, Twitter or LinkedIn.

Media Contacts: Michael Globetti, michael.globetti@delaware.gov ; Nikki Lavoie, nikki.lavoie@delaware.gov

DOVER – The US Air Force and Dover Air Force Base have notified Delaware’s Department of Natural Resources and Environmental Control and Division of Public Health that four wells near the base sampled by the federal government for perfluoroalkyl substances (PFAS), including perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), have returned elevated levels of PFOS and PFOA above the US Environmental Protection Agency’s health advisory for these substances of 70 parts per trillion (ppt).

Because of the elevated PFOS and PFOA levels, the owners of the four wells – which provide water to a shopping center with five businesses, two residences, and an office building – have been notified and provided with bottled water by Dover AFB. PFOS and PFOA are chemicals used in a variety of products that over time have become widely distributed in the environment – and have been found at Dover AFB and other air bases and airports in firefighting foam. The USAF and EPA have been working with DNREC and DPH to determine the impacts of PFOS and PFOA on private wells in proximity to the base.

A USAF fact sheet about the Dover AFB PFOS and PFOA sampling published in late spring said that groundwater samples collected in shallow monitoring wells on the base showed levels of PFOS and PFOA above EPA’s 70 ppt health advisory. “Based on these results, actions have been undertaken to ensure that drinking water at DAFB and the surrounding community is not impacted,” the fact sheet noted.

No PFOS or PFOA were detected in five nearby municipal water wells tested sampled in November 2014 by Dover AFB’s water supplier, Tidewater Utilities. Tidewater sampled four on-base municipal supply wells and the off-base municipal supply well nearest the base. All of these wells draw water from a deep, confined aquifer, and there were no PFOS or PFOA detections in any of them.

Representatives from the USAF this year then began contacting owners and users of private or commercial wells on properties near the northwest and east boundaries of Dover AFB, and asking permission to take drinking water samples. The four private wells that returned elevated levels of PFOS and PFOA on July 12 are located along those boundaries.

The primary step necessary to protect the public’s health from exposure to PFOS and PFOA in drinking water is to use an alternate water source until a permanent solution can be determined, which may consist of treatment, connecting to a new system, or other solution. DPH encourages the impacted businesses, office building, and dwellings in the affected area to use the bottled water provided by the DAFB until a permanent solution is in place. Anyone with specific health concerns or questions about potential health impacts is encouraged to contact their primary care provider. General questions about health effects from, and exposure to PFAS can call DPH at 302-744-4546.

For more information, please contact:
436th Airlift Wing, Public Affairs
Cell Phone: 302-363-9006 or 302-677-3372.
Email: 436AW.PA@us.af.mil

Vol. 49, No. 193

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