NC0026921_Note to File_20000907

Parkton — note to the file
September 7, 2000, P.M., Belinda and myself stopped by the plant to visit
with Roy Lowder. The facility looked good, I could see the bottom of the
chlorine contact chamber. Parkton has purchased new ISCO samplers and
Belinda recommended that a thermometer be installed for proof of proper
temperature and that it be logged. Roy mentioned that he had been receiving
considerable grit in the influent. I suggested that he look at his pump
stations and collection system to try and locate the source.
The plant chart recorder showed flow spikes and I suggested that he check
his stations to see if two pumps were coming on at the same time, which that
is what appeared to be happening. I noticed that the chlorinator was not
feeding, by looking at the rotormeter. The flow pace appears to be way out
of adjustment. Roy called the next day to say that he had been in touch
with Regal and they had instructed him how to calibrate the flow pacer.
Parkton is continuing to have fecal violations and I went over with Roy the
proper protocol for collecting his fecal sample. I plan a flow -up next week
Don Register

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It has been brought to my attention that moneys are left over from a sewer collection system rehab project.
The Town of Parkton WWTP has several immediate needs that this money could go a long way in ,
protecting water quality. I have worked with Parkton personnel on technical assistance at the wwtp and /
there are a few things that are beyond their operating control such as the chlorine contact being too small. ✓
From Jan. 1999 - June 2000 there has been eleven fecal coliform violations reported on the D.M.R..
Technical assistance has shown that part of the problem was possibly too low of a chlorine residual, but
more importantly it was determined the chlorine contact chamber is too small. This was determined by
adding dye to the effluent entering the chamber with a flow rate during the test ranging from a rate of
110,000 gpd to 140,000 gpd. The detention time was determined to be nine minutes, which is much less
than the required thirty minutes. The wwtp also needs a automatic fine tooth barscreen in the place of the
current coarse manual screen. This facility is not manned full-time, so rags accumilate heavily on the
screen. Grit in the oxidation ditches has also been a serious problem, because the facility does not have
grit removal. All of the grit in the influent wastewater settles in the oxidation ditches reducing it's volume
and the quality of it's effluent, risking non-compliance with their permit limits.
To be assured that water quality is not compromised, these corrections need to be made to this facility. I
hope the unspent money can be used for this critical and much needed water quality purpose. If I can
further explain or assist in any way please call me at the Fayetteville Regional Office, DWQ.
910-486-1541
Don Register, Environmental Tech. IV.
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