Between 0900 and 1100 on june 12, 1986, an overflow valve on processing tanks at the general chemical…

Timeline · 2 messages, oldest first

1. 1
   NOAAORR-63671986-06-10 00:00Z → cancelled 1986-06-24 00:00Z
   Between 2300 and 0400 on june 10, 1986, a valve was accidently left open at the roehm and haas company,…

   Roehm and Haas Company; Philadelphia, Pennsylvania.
   Philadelphia, Pennsylvania.
   1. Between 2300 and 0400 on June 10, 1986, a valve was accidently left open at the Roehm and Haas Company, releasing approximately 2,200 gallons of perchloroethylene from a tank into a sewer which drained into a city water treatment facility and finally, into the Delaware River, two miles downstream. The facility notified the U.S. Coast Guard Captain of the Port (COTP) for Philadelphia of the release when it was discovered. USCG district 3.
   2. COMMODITY: PERCHLOROETHYLENE. MAXIMUM POTENTIAL RELEASE: 2200 GALLONS.
   3. POSITION 39.950N 075.162W. NOAA INCIDENTNEWS 6367: https://incidentnews.noaa.gov/incident/6367

2. 2
   NOAAORR-63681986-06-13 00:00Z → cancelled 1986-06-27 00:00Z
   Between 0900 and 1100 on june 12, 1986, an overflow valve on processing tanks at the general chemical…

   General Chemical Corporation; Claymont, Delaware.
   Claymont, Delaware.
   1. Between 0900 and 1100 on June 12, 1986, an overflow valve on processing tanks at the General Chemical Corporation failed, releasing 12,900 pounds of ammonium sulfite and 11,000 pounds of ammonium bisulfite into the plant water system, which discharges processing effluent into the Delaware River, just north of the Christiana River, approximately 10 miles downstream from Philadelphia. These chemicals were intermediate reducing agents and were being used to make ammonium thiosulfate used in photo processing. The plant had a National Pollution Discharge Elimination System (NPDES) permit, which requires routine composite sampling of discharge water each month; coincidentally, the monthly sampling occurred within 24 hours of the accidental release. Sample results indicated contamination levels of 19.75 ppm, significantly higher than the permit discharge level for both chemicals in composite [...]
   2. COMMODITY: AMMONIUM SULFITE, AMMONIUM BISULFITE. MAXIMUM POTENTIAL RELEASE: 24000 GALLONS.
   3. POSITION 39.788N 075.491W. NOAA INCIDENTNEWS 6368: https://incidentnews.noaa.gov/incident/6368