DEQ-CFW_00019696

wutp�- �"'esourcws
June XX, 2016
Dr. Mina Shehee, Supervisor
Medical Evaluation & Risk Assessment Unit
Occupational & Environmental Epidemiology Branch
Division of Public Health
Dept. of Health and Human Services
1912 Mail Service Center
Raleigh NC 27699-1912
Mr. Michael Scott, Director
NC Division of Waste Management
Dept. of Environmental Quality
1646 Mail Service Center
Raleigh, NC 27699-1646
Dear Dr. Shehee and Mr. Scott:
PAT MCCRORY
DON LLD R. VAN DER VAART
S. JAY ZIMMERMAN
The Division of Water Resources (DWR) has initiated a review of the existing Interim Maximum
Allowable Concentrations (IMACs). DWR is reviewing the IMACs in accordance with Rule
15A NCAC 02L.0202 and the SOP for Reviewing Groundwater Standards that was mutually
developed by our respective agencies. DWR is reviewing the IMACs so that they may be
presented to the Environmental Management Commission for consideration of adoption as North
Carolina groundwater standards through the formal rulemaking process. DWR plans to submit
the IMACs to your respective divisions in groups of 5-10 chemicals to facilitate the secondary
reviews.
In accordance with the SOP dated January 20, 2011 (attached), DWR requests DPH and DWM
review the enclosed supporting documentation and provide comments to DWR on the proposed
02L standards revisions for the following substances:
• Acetochlor
(IMAC unchanged from 20 10)
• Acetochlor ESA
(IMAC established 2010, changes proposed)
• Acetochlor OXA
(IMAC established 2010, changes proposed)
• Acetophenone
(IMAC unchanged from 2011)
• Acrolein
(IMAC unchanged from 2010)
DWR has enclosed its documentation for groundwater standard calculation sheets and summary
documents. The groundwater standard calculation sheet is now condensed to a single page that
includes identification of the critical health effect, inclusion of the estimated practical
State of North Carolina I Environmental Quality '! Water Resources
1611 Mail service Center I Raleigh, North Carolina 27699-1611
919 707 9000
DEQ-CFW-00019696

quantitation limit (PQL), a history section and references for each quantitative value. The
groundwater summary document includes the regulatory criteria used to determine the
proposed standards as well as references and links to documents and information used to develop
the proposals.
We welcome your input on these documents. Please direct inquiries and comments on these
proposals before July XX, 2016 to Dr. Candace Prusiewicz at [e-mail]
or 919-707-9022.
Thank you for your time and consideration. We look forward to receiving your comments.
Sincerely,
Linda Culpepper
Deputy Director
Enclosures
cc: Jay Zimmerman, Director DWQ
Jon Risgaard
Tom Fransen
Jeff Manning
Connie Brower
Chris Ventaloro
Candace Prusiewicz
DEQ-CFW-00019697