02_IDDE SOP (May 4, 2021)

1 CINSTITUTIONAL INTEGRITY AND RISK MANAGEMENT
Environment, Health and Safety
Illicit Discharge Detection and Elimination (IDDE) Standard Operating Procedure (SOP)
An Illicit Discharge is the release of pollutants to UNC's storm drainage system via overland flow or by direct
dumping of materials into a catch basin, curb gutter,or grated inlet(e.g., storm drains).
Common methods of discovering an illicit discharge:
1. Routine stream monitoring: EHS routinely conducts dry-weather monitoring of surface water.This ensures
that stream flow is minimized, and any illicit discharge pollution will be more highly concentrated and easier
to detect.
2. Calls to EHS hotline: Members of the community call EHS to report concerns about surface water or to
report evidence of chemical spills or releases on campus.
3. Calls to 911 (Campus Police): Members of the community call Campus Police to report concerns about
surface water or to report evidence of chemical spills or releases on campus. Campus Police will notify EHS
24/7 with any calls regarding chemical releases.
4. Notification directly to EHS Environmental Affairs: UNC employees often contact EHS directly to report
spills, releases,or environmental concerns.
5. Routine inspections of construction sites, chemical storage areas, and operational activities: EHS and other
UNC employees may observe potential illicit discharges during routine inspections on campus.
Investigating a potential illicit discharge:
The "UNC Illicit Discharge Investigation Flowchart" shows the general process of determining the cause of an
illicit discharge, as well as spill response and follow-up if the illicit discharge requires a larger response. If the
spill requires the EHS Emergency Response Team,the "UNC EHS Procedure for Illicit Discharge"flowchart
shows the spill response process to be followed.
Follow-up to an illicit discharge:
After the source of the illicit discharge is identified, EHS will work with the responsible party to ensure that
they are taking corrective actions to prevent another incident.Some illicit discharges can't be traced back to
the specific source, e.g.vehicle fluid spills from campus visitors.
Documentation:
Illicit discharges are documented in the EHS Hasmis database and are entered into GIS to indicate location of
the incidents.
Reporting:
EHS will report spills meeting reportable criteria to regulatory agencies as appropriate.
UNC Environment,Health&Safety Updated 05/04/2021
http://ehs.unc.edu/environmental/stormwater/
[phone]

LJNCINSTITUTIONAL INTEGRITY AND RISK MANAGEMENT
>> Environment, Health and Safety
UNC EHS Illicit Discharge Investigation Flowchart
Incident report AORoutire stream
(from UNC or inspection
Community) (quarterly,major
outfalls)
Locate outfall and receiving stream on map
Yes Unusual color,odor?
Substance on surface?
No
• Oil slick?
• Chemical odor? No Use water meter and/or test strips to measure stream conditions:
Dead fish? Quality(color,odor,clarity,floatables)
Safety hazard? Chemistry(pH,DO,temperature,conductivity,salinity,turbidity)
yes Yes
Results within acceptable ranges?
No
Use storm drain map to check upstream manholes
Follow"UNC EHS until source of illicit discharge is located
Emergency Response
Procedure for
Illicit Discharge"
Contact responsible party
i Document:
Ask them to stop discharging
i Spill response in Hasmis&G15
Emergency I Provide guidance on corrective Routine inspections in GIS
response I actions to mitigate spill
complete i
i
i
Is spill reportable to Yes LHS contacts regulatory agencies to report
regulatory agencies? spill and follow up as required by law
No
UNC Environment,Health&Safety Updated 05/04/2021
http://ehs.unc.edu/environmental/stormwater/
[phone]

LJNCINSTITUTIONAL INTEGRITY AND RISK MANAGEMENT
>> Environment, Health and Safety
UNC EHS Emergency Response Procedure for Illicit Discharge
Hazmat Yes IF and
Spillevacuate
No
It DF-w3m
help coordinate spill
No response and reporting.
Yes
Call U NC Grounds
234-9951.Grounds will
Yehelp trace spill path
While wpiting for through storm drains.
EHS E-honniental Affairs:
Go to nearest downstream outfall
Major Outfall
An ouff'11 is where a stormwater pipe discharges into a
st—m.Some minor outtalls discharge to dry clitthes.
Yes
Yes No
ENS Environmental
Affairs reports spill to
Install spill booms and appropriate agencies
white absorbent pads on L -A
stream surface
spill path.Bring fl::hlsight and
manhole lid lifter.
UNC Environment,Health&Safety Updated 05/04/2021
http://ehs.unc.edu/environmental/stormwater/
[phone]