DEQ-CFW_00049996

From: Steve Tedder [tedderfannconsu|ting@gnnaiicom]
Sent: 8/I4/20171:20:58PN1
To: Snyb,]u|ie [/o=ExchanXeLabs/ou=[xchangeAdministrative Group
(FYD|BOHFI]3PDLT)/cn=Kecipients/cn=75dI654d45154cIabbO8596aIc9af%8%-jagoyb]
Subject: RE: IWC
3ulie'
Thanks for the information. And you are correct, it has been a while since
z conducted a npx.
The reason z asked for the zwc formula you guys use is because z was having
a difficult time getting the one in a 1999 WET strategy document to jive
with the zwc numbers. Granted z may (am) be math challenged but z never did
get the formula in the document below to work.
This is the strategy document the Aquatic Tox folks have on their *ebsite.
https;yncdenr.s5.amazonaws.rom/sJfs-publir/water`/`2OQuali Ooocunents/
whole%2Osffluent%2OToxicity'/oZO(wsT)/wsT%20nonitoring%2Oand%Z0nepnrting/mcow0
%20wsT%20strategy.pdf
The formula you sent works, and the formula on the Aquatic tox biocide
worksheets work as well. The one above' not so much. [at least form me]
z would like a copy of the mpA guidance the permitting staff utilizes as
they develop potential parameters to be limited in permits. This may be on
the permitting *ebsite, but z could not locate it.
pYz'
when z was in the building last week z ran into 3ay Z. we talked Gen x and
several other topics as well as the permitting program issues and the
backlog. z told him that as issues change, staffing expertise changes'
budgets get cut, etc. sometimes you need to make programmatic changes to
keep pace. The same old structure that may have worked back in 2000
probably will not work the same in 2017.
z suggested getting the mposs permitting under one supervisor {you} would
add greater flexibility and more efficient use to the permitting staff. He
seemed to be listening but who knows if he will every do anything other than
just stay in the same rut.
Tedder
---original message -----
From: Grzyb. 3ulie [mailto:julie.grrybWncdenr.gnv]
Sent: priday, August lI' 2017 9:55 mw
To: weaver, Charles; Steve Tedder
Cc: Templeton, mike
subject: RE: IWC
Hi Steve,
Good morning. Guess it's been a while since you did a npA!
Here ya gu-
zwc ~ Percentage contribution of Permitted plm* (pp) from wwTp
zwc(%) ~ [Pp / (pp + 7Q10s)] * IOO
To calculate a wQ limit it's the standard / zwc using the 7qI0s for a
chronic standard and use the 1Q10 for an acute standard In this case the zwc
is as a fraction (nut in percentage form).
call if you have any questions.
3ulie x Grryb
supervisor
mPocs complex permitting
mc osQ / Division of water Resources / water Quality permitting

919 707 9000 main office
[e-mail]
Physical Address: 5I2 worth Salisbury st.'Raleigh' NC, 27604 mailing
Address: 1617 mail service center' Raleigh, wc. 27699-I6I7
Email correspondence to and from this address is subject to the worth
Carolina public Records Law and may be disclosed to third parties.
---original message ---
prom: weaver' Charles
Sent: Friday, August ll, 2017 6:49 AM
To: Steve Tedder /[e-mail]>
cc: srzyb. 3ulie <[e-mail],; Templeton' Mike
<mike.templetnnNncdenr.gov^
subject: Re: zwc
Steve - I'm out of the office today' so z don't have the formula handy.
For existing facilities we'd use the flows from the wLAs done in the 90s. z
don't know what we'd use for new facilities.
3ulie / mike - do you have the formula handy? If so, please share with
Steve.
Thanks'
cxw
Messages sent to or from this address are subject to the North Carolina
Public Records Law.
From: Steve Tedder /[e-mail]>
Sent: Thursday' August IO' 2017 5:24 PM
To: Weaver, Charles
subject: zwc
Charles,
what is the formula you are using to calculate zwc ?
Tks
Tedder
[logo bus rardl]

This email has been checked for viruses by wvo.