NC0026921_Toxicity Update_20140205

Lopez, Dale
From: Lopez, Dale
Sent: Wednesday, February 05, 2014 11:07 AM
To: Lopez, Dale; Henson, Belinda; Brantley, Mark; Allen, Trent; White, Hughie
Subject: RE: Parkton POTW WET failure for October (and now for November too)
Roy faxed me an AT-1 result form for January, the beginning of a new quarter. It was a "Pass" ! I think Roy might have
started adding bioaugmenting nitrifiers. Looks like he might be out of trouble for now with the Whole Effluent
Toxicity. Parkton's recent history was a "fail" for the whole last quarter of 2013, with a "Fail" for October, a 58.1% for
November, and a 94.9% for December (which was good, but it didn't bring his average up over Parkton's 90% WET
permit limit for the following two months after the "Fail" for October).
From: Lopez, Dale
Sent: Monday, December 16, 2013 10:31 AM
To: Lopez, Dale; Henson, Belinda; Brantley, Mark; Allen, Trent
Subject: RE: Parkton POTW WET failure for October (and now for November too)
Roy faxed me the AT-3 form for the November failure for Whole Effluent Toxicity for Parkton. This time the Chronic
value was 58.1% with the multiple dilution method. Parkton's limit is 90%. Again, Roy said that he thinks that the
cause is high ammonia.
From: Lopez, Dale
Sent: Friday, November 15, 2013 3:42 PM
To: Henson, Belinda; Brantley, Mark; Allen, Trent
Cc: Lopez, Dale
Subject: Parkton POTW WET failure for October
Roy Lowder reported that the Whole Effluent Toxicity resulted in a "Fail" for October. Roy thinks that the high effluent
ammonia is causing the failure. He said that the heavy rains in June 2013 washed out some of the POTW's biomass and
nitrifiers, and he said that he has been having problems ever since. Roy talked Dwight Lancaster this morning, and
Dwight is suppose to phone him back to offer additional advice.
Dale Lopez
Environmental Specialist
NCDENR-Division of Water Resources
Water Quality Programs
Fayetteville Regional Office
910-433-3312 voice
910-486-0707 fax
Email: dale.lopezAncdenr.gov
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