NC0051322_Staff Comments_20180629

Hennessy, John
From:
Bolich, Rick
Sent:
Friday, June 29, 2018 1:53 PM
To:
Hennessy, John
Cc:
Smith, Danny; Cory Larsen; Zhang, Cheng
Subject:
RE: [External] RE: Ashley Hills waste streams
Attachments:
Ashley Hills DMR data.xlsx
Hi John;
A1666 513 2-
I pulled a BIMS report on the DMRs for this permit and looked at the current permit (NC0051322). I isolated the
radiologicals and put them on a separate tab. I labelled them "Rads" on the attached spreadsheet. The "Rads" were
analyzed for about two years and there is not much of concern EXCEPT for the May, 2009 total gross alpha of 51
picocuries per liter. I believe that exceeds the drinking water standard, but may not represent a violation of their permit
since the limit is based on an annual average.
I could not find anything in the current permit that lists water supply well filter backwash as a source. It doesn't exclude
it, either. I don't know if this activity (disposal of water filter backwash) would or should be considered "deemed
permitted".
RRO recommends that monitoring for gross alpha be added to the permit if disposal of well filter backwash is
permitted. If elevated gross alpha shows up, we may want to add monitoring for some of the other radiologicals. If they
continue to add water supply well filter backwash or green sand filter backwash, we recommend monitoring the NPDES
effluent from the plant for iron, manganese, and chloride.
rb
From: Hennessy, John
Sent: Wednesday, June 27, 2018 5:03 PM
To: Bolich, Rick <[e-mail]>
Cc: Smith, Danny <[e-mail]>
Subject: RE: [External] RE: Ashley Hills waste streams
Ck. Just trying to figure out if they are loading pollutants to this facility that we need to monitor. Or, if we have a
sufficient dataset to leave the situation as is because we are comfortable that their discharge is being treated
adequately.
From: Bolich, Rick
Sent: Wednesday, June 27, 2018 4:46 PM
To: Hennessy, John <][e-mail]>
Cc: Smith, Danny <[e-mail]>
Subject: RE: [External] RE: Ashley Hills waste streams
Let me take a closer look at the file and the data that we have. I've been in a meeting all day and just forwarded you an
email I got from Wake Co. about this. Wake Co. Env. Services inspects this W WTP under our MCA with them.
rb

From: Hennessy, John
Sent: Wednesday, June 27, 2018 4:31 PM
To: Bolich, Rick <rick.bolich6Dncdenr.aov>
Cc: Smith, Danny <[e-mail]>
Subject: RE: [External] RE: Ashley Hills waste streams
So, are y'all comfortable that we have adequately sampled the discharge they are loading to the facility for iron,
manganese, and radiolical components? I think I am if we have 7 tears if data.
From: Bolich, Rick
Sent: Wednesday, June 27, 2018 4:08 PM
To: Hennessy, John <[e-mail]>
Cc: Smith, Danny <[e-mail]>
Subject: Fwd: [External] RE: Ashley Hills waste streams
FYI
Sent from mobile device.
Begin forwarded message:
Resent-From:<SRSO=xaFo=JN=carolinawaterservicenc.com=[e-mail]>
From: Stephen Harrell <Stephen. Harrell @carolinawaterservicenc.com>
Date: June 27, 2018 at 4:05:39 PM EDT
To: Cory Larsen <[e-mail]>
Cc: "Bolich, Rick" <[e-mail]>
Subject: [External] RE: Ashley Hills waste streams
Most of the backwash started @ 2006. In 2006/2007 a few filter systems went in that area. Some direct
charge to the collection system, a few - pump and haul. The radiological limits ended with the permit
that expired in 2013.
From: Cory Larsen [mailto:[e-mail]]
Sent: Wednesday, June 27, 2018 3:56 PM
To: Stephen Harrell <[e-mail]>
Cc: Bolich, Rick <[e-mail]>
Subject: Ashley Hills waste streams
Steve,
Could you please explain when the W WTP began receiving the iron/manganese and ion exchange waste
streams? Also when was the monitoring for radionuclides performed and when was it removed from
the permit? Approximate dates are fine for our purposes.
Cory Larsen, PE
Environmental Consultant— DWR MCA Program Lead
Department of Environmental Services / Water Quality Division

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