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Home My WebLink AboutDEQ-CFW_00012919From: Ruh|nnan,Carrie [/O=EXCHANGELA8S/OU=EXCHANGEADMINISTRATIVE GROUP (FYD|BOHF2]SPDLT)/CN=REOP|ENTS/CN=]GBZ28317F]A44B3A71B12A1AC2O9B1A-CARUHUNAN] Sent: 1/2I/I0I64:I7:42 PM To: Brower, Connie [/b=ExzhanXeLabs/ou=ExchangeAdministrative Group (FYD|8OHFZ33PDO)/cn=Redpient$cn=7ee8db84d9554]1c9aIf781f5597ba62-cubrower] Subject: RE: NCsurface water quality standard You're the best �) Carrie nuhlman monitoring coalition coordinator Division of water Resources - water sciences section Department of Environmental Quality 919-745-84I1 carrie.ruhlmanNncdenr.guv Physical Address: 4401 needy Creek Road, Raleigh, mc 27607 mailing Address: 1623 mail service center' Raleigh' wc 27699-I625 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. ---original message ----- From: Brower' Connie Sent: Thursday' zanuary 21, 2016 I1:08 mw To: nuhlman' Carrie /carrie.ruhlman0ncdenr.gon,; knappe0ncsu.edu; ventaloro' Christopher <christopher.ventalornNncdenr.guv> subject: RE: wc surface water quality standard Good morning, Detlef and Carrie The applicable criteria for 1'4 oioxane is 0.35 ug/L for ws waters . This is appropriately based upon a I x 10-6 cancer risk. We are aware that the multiple tables are confusing' and we are working with our attorneys to determine how best to relay information pending EPA approval of a number of other standards. For your convenience, we have attached the excel spread sheet that has the appropriate information and references. Please feel free to call us if we can be of further assistance - Regards, Connie Connie U. Brower Water quality standards coordinator classifications and standards/ Rules Review Branch Water Planning section' Division of water Resources Department of Environmental Quality 919 807 6416 office 919 707 9000 main office cnnnie.Brower@ncdenr.gov Physical Address: 512 North Salisbury st.'naleigh, NC, 27604 mailing Address: I611 mail service Center, Raleigh, wc' 27699-161I Email correspondence to and from this address is subject to the North Carolina public Records La* and may be disclosed to third parties. OEQ-CFVV_00012919 ---original message ----- From: nuhlman' Carrie Sent: Thursday' 3anuary 21, 20I6 7:42 Am To: Brower, Connie <cunnie.brnwerNncdenr.gov, subject: pw: wc surface water quality standard can you please help me with this? z feel like we've answered this question at least 5 times before for various people ... maybe z need more coffee! Carrie nuhlman monitoring coalition coordinator Division of water Resources - water sciences section Department of Environmental Quality 919-745-8411 carrie.ruhlman@ncdenr.gnv Physical Address: 440I needy creek Road, Raleigh, wc 27507 mailing Address: 1623 mail service center' Raleigh, mc 27699-1623 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. ---original message ----- From: oetlef nnappe [mailto:knappe@ncsu.edu] Sent: Wednesday, 3anuary 20' 2016 5:02 mw To: nuhlman' Carrie /carrie.ruhlman0ncdenr.gon, subject: mc surface water quality standard Hi carrie, z just looked at the os0 web page with the surface water quality standards and criteria and noticed that the table showing standards that are currently in effect now list a 1'4-dioxane concentration of ].I ug/L for water supplies. This does not appear to agree with the narrative surface water quality standard that states that for carcinogens' the level should be that corresponding to the IO^-6 cancer risk level for water supplies. There is another table showing the 0.35 ug/L level under the heading "The following surface water quality standards are pending approval of the 2007-20I4 Triennial Review by spx^ see http:!/pnrtal.ncdenr.org/web/wq/ps/csu/swstandards and the links to the mc+cn^ tables in near the bottom of the box to the right. Best, oetlef _ oetlef nnappe Professor 319-s Mann Hall Department of Civil' Construction, and Environmental engineering North Carolina state university campus Box 7908 Raleigh, wc 27695-7908 Phone: 9I9-5l5-8791 Fax: 9I9-5l5-7908 E-mail: knappe@ncsu.edu web page: http://knappelab.wnrdpress.nrsu.edu/ OEQ-CFVV_00012920