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DNREC : DERNS : Recent Releases : Environmental Release Detail [17615]
Release ID 17615  Release Date/Time 12/12/2025 2:00:00 PM 
Extremely Hazardous NO  Report Date/Time 12/13/2025 11:35:00 AM 
Release Location DELAWARE CITY REFINERY 4550 WRANGLE HILL RD. NEW CASTLE, DE 19720 
Facility ID & Name 5913 DELAWARE CITY REFINERY  Facility Address 4550 WRANGLE HILL RD.
NEW CASTLE, DE 19720
 
Substance Released CARBON MONOXIDE  Release Duration At Least 360 minutes 
Estimated Quantity N/A 
Released To
Additional Information ON 12/13/25 AT APPROXIMATELY 1135 HOURS I RECEIVED AN EXCEEDANCE FAX FROM THE DELAWARE CITY REFINERY. THE FAX STATED: This fax is to inform you that on Friday, December 12, 2025 CT 1 hourly CO limit was exceeded for six hours from the hour ending 14:00 through the hour ending 19:00. 
Health Risks: (Information provided here may be from the Cameo Chemical database and may or may not pertain to this specific release. It is provided as a precaution only.) CARBON MONOXIDE The following chemical information was taken from the CAMEO Chemical database. Inhalation causes headache, dizziness, weakness of limbs, confusion, nausea, unconsciousness, and finally death. 0.04% conc., 2-3 hr. or .06% conc., 1 hr.- headache and discomfort; with moderate exercise, 0.1-0.2% will produce throbbing in the head in about 1/2 hr., a tendency to stagger in about 1 1/2 hr., and confusion of the mind, headache, and nausea in about 2 hrs. 0.20-25% usually produces unconsciousness in about 1/2 hr. Inhalation of a 0.4% conc. can prove fatal in less than 1 hr. Inhalation of high concentrations can cause sudden, unexpected collapse. Contact of liquid with skin will cause frostbite. (USCG, 1999) 
Medical Attention: (Information provided here may be from the Cameo Chemical database and may or may not pertain to this specific release. It is provided as a precaution only.) CARBON MONOXIDE The following chemical information was taken from the CAMEO Chemical database. Eye: If eye tissue is frozen, seek medical attention immediately. If tissue is not frozen, immediately and thoroughly flush the eyes with large amounts of water for at least 15 minutes, occasionally lifting the lower and upper eyelids. If irritation, pain, swelling, lacrimation, or photo phobia persist, get medical attention as soon as possible. Skin: If frostbite has occurred, seek medical attention immediately; do NOT rub the affected areas or flush with water. In order to prevent further tissue damage, do NOT attempt to remove frozen clothing from frostbitten areas. If frostbite has NOT occurred, immediately and thoroughly wash contaminated skin with soap and water. Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible. (NIOSH, 1997) 
Precautions Recommended None  Public Notified? NO 
Facility Contact Name: MATT REED  Facility Contact Phone: 302-290-0261 
Facility Contact Email:   Status Final 



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