DEQ-CFW_00059162

PAT MCCRORY
DONALD R. VAN DER VAART
MICHAEL SCOTT
Date: July 5, 2016
To: Jay Zimmerman, Director
Division of Water Resources
From: Michael Scott, Director
Division of Waste Management
RE: Establishment of New Interim Maximum Allowable Concentrations (IMACs)
With this memorandum, the Division of Waste Management (DWM) submits proposed interim
maximum allowable concentrations (IMACs) for five chemicals to the Division of Water Resources (DWR).
The different programs within DWM are involved in the assessment and remediation of releases of these
chemicals to groundwater. Therefore, DWM requests IMACs for target cleanup levels.
The types of sites overseen by DWM include, but are not limited to, chemical and furniture industry,
abandoned chemical sites, agricultural chemical releases, landfills, metalworking, wood treating, printing,
plating and military facilities. The requested IMACs are for chemicals encountered at these types of sites.
For example, DWM encounters solvents in groundwater at furniture manufacturing and restoration, textile,
wood treating, landfill and paint and printing sites. Pesticides, herbicides, intermediates and solvent carriers
are encountered at sites where agricultural chemicals have been stored, disposed or spilled during mixing.
Several of the listed chemicals are associated with explosives found at military facilities. In addition to
direct releases, some contaminants change the chemistry of the subsurface soil and mobilize naturally
occurring metals.
Concerning agricultural chemicals, DWM only has authority to require remediation where the
contamination is not due to normal application. However, we understand DWR and the Department of
Agriculture may want to be aware of cases of contamination due to normal application of pesticides for
protection of water quality and restriction of pesticide use.
I hope this explains DWM's need for developing IMACs for a more expanded list of chemicals than
presently exists. A list of the proposed IMACs is included on the next page of this memorandum. Please let
me know if DWM can assist further in the development of IMACs for these chemicals. Please call me at
[phone] if you have any questions.
State of North Carolina I Environmental Quality I Waste Management
1646 Mail Service Center 1217 West Jones Street 1, Raleigh, NC 27699-1646
919 707 8200 Telephone
DEQ-CFW-00059162

Jay Zimn/ennan
July 5,2O|6
Page 2 of 2
Chemical
CAS #
Proposed Interim Standard (pg/1)
OEQ-CFVV_00059163