NC0005363_Pilot Study_20040225

Re: RO wastewater at Weatherspoon Plant - NC0005363
Subject: Re: RO wasterVaier. atoWeather poon4Plant =N' -0005363'
Date: Wed, 25 Feb 2004 14:01:19 -0500
From: Tom Belnick <[e-mail]>
To: "England, Louise" <[e-mail]>,
"Cahoon, Steve" <[e-mail]>
CC: Paul Rawls <[e-mail]>, Belinda Henson <[e-mail]>,
Dale Lopez <[e-mail]>
Hello folks- I discussed the proposed pilot study with the Fayetteville Regional office, and DWQ is
comfortable with the proposal. The pilot study will discharge approx. 3,600 gpd of RO reject water to the
cooling pond, which only discharges (via Outfall 001) during extreme weather events, and also has a
toxicity test requirement. If you decide to pursue a permanent RO discharge, you will need to modify
your permit application to reflect a new wastestream, and include analytical data collected of the RO reject
wastestream from the pilot study.
England, Louise wrote:
Weatherspoon Plant is interested in using a RO on a trial basis for cleaning up well water prior sending it to their
demin system for further purification before use in their boiler. A coagulant, Solisep MPT150, and an anti-scalent,
Hypersperse MDC120, will be fed when the RO is operating. Both the Solisep MPT150 and Hypersperse
MDC120 will be fed at a rate of 3 ppm (0.025 pounds per 1000 gallons of water). The reject water from the RO
will be discharged to the cooling pond (Outfall 001) at a flowrate of 15 gpm and will be discharged for
approximately 4 hours per day, seven days a week. The cooling pond discharges to the Lumber River only rarely,
usually in anticipation or as a result of heavy rains associated with hurricanes. The RO will be cleaned on a •
quarterly basis utilizing both acidic (Kleen MCT403) and caustic (Kleen MCT411) cleaners which will also be
discharged to the cooling pond. During the cleaning process approximately 48 pounds of the low pH cleaner
(Kleen MCT403) will be used while 24 pounds of the high pH cleaner (Kleen 411) will be used. Attached are the
MSDSs for the chemicals and an analysis of the well water and the estimated reject water concentrations. Will
the use of this RO and associated chemicals be allowed? If so, if we decide to use a RO permanently we will
amend our permit application to reflect the use of these chemicals.
Thanks,
Louise England
Progress Energy Carolinas, Inc.
362-3522
«SOLISEPMPT150.htm» «HYPERSPERSEMDC120.htm» «KLEENMCT403.htm»
«KLEENMCT411.htm» «weatherspoon reject water.xls»
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