6. NCS000465_IDDESOP_20210202

21
Morrisville
Live connected. Live well.
STORMWATER PROGRAM STANDARD OPERATING PROCEDURE (SOP)
ILLICIT_DISCHARGE_DETECTION_& ELIMINATION
Date: January 8, 2020
To: Town Departments & Public
Prepared By: Tony Victor, Environmental Specialist
Approved By: Ben Mills, Stormwater Engineering Manager
Purpose:
IDDE investigations, reporting, and rehabilitation are essential to a successful stormwater program
by identifying illicit discharges and eliminating them along with restoring/repairing pollution
damage.
Tracing Illicit Discharge:
Tracing illicit discharge to the source will be done visually when applicable. Tracing the source with
the pipe camera may be utilized when the source may be within pipes. Utilization of chlorine
detection tools will be utilized when there is a possibility of an illicit connection.
Details:
♦ Once an Illicit discharge has been identified and traced to the source if possible, the following
SOP will be followed to characterize the nature of, and the potential public or environmental
threat posed by the illicit discharge.
♦ Identify the substance material of illicit discharge and determine the appropriate Personal
Protection Equipment (PPE) to be utilized.
♦ If possible, stop the source of the illicit discharge and/or prevent the discharge from impacting
or further impacting the downstream infrastructure or waterways.
♦ Report an illicit discharge of >25 gallons of petroleum to the NC Department of Environmental
Quality (NCDEQ) or if the petroleum caused a sheen on the nearby surface water, or if the
petroleum is discharged at a distance of ioo feet or less from any surface water body.
NCDEQ: NCDEM 800-858-0368, Raleigh Regional Office (RRO) 919-791-4200
♦ Report an illicit discharge of <25 gallons if it cannot be cleaned in 24 hours or if it creates a
sheen on nearby surface water.
♦ If there are questions about what is to be reported, refer to this web page:
https://deq. nc.gov/about/divisions/water-resources/water-resources-
permits/peres/emergency-response
too Town Hall Drive I Morrisville, NC 2756o I P: 919.463.6200 I F: 919.460.7662 I townofmorrisville.org

♦ Report an illicit discharge of >1000 of sewage to the Division of Water Resources (NCDWR) or
any spill that reaches surface waters, regardless of volume (919-791-4200). Outside of normal
business hours reports may also be made to the Division of Emergency Management at
telephone number [phone] or [phone]. Report to Wake County Department of
Environmental Services 919-216-0456.
♦ Town of Morrisville's Stormwater Inspector or Administrator shall initiate an investigation
immediately and ensure restoration of effected areas.
Initiate Investigation:
♦ Identify the material and the source if possible.
♦ Immediately stop or reduce any impact to the stormwater conveyance if possible, using
appropriate safety measures and proper PPE.
♦ Notify the appropriate authorities (Town Staff, NCDEQ, NCDWR, EPA, etc.)
♦ Notify the property owner.
➢ Describe actions and directions
♦ Provide technical assistance for removing the source of the discharge or otherwise
eliminating the discharge.
➢ Describe assistance that might be available.
♦ Take photos of the source and the impact of the illicit discharge.
♦ Fill out a Town of Morrisville IDDE inspection report covering the following items:
➢ Date and time Town became aware of the non -storm water discharge
➢ Date the Town initiated an investigation of the discharge
➢ Date and time the discharge was observed
➢ Location of the discharge
➢ Description of the discharge
➢ Method of discovery
➢ Date and method of removal/remediation completion and verification
➢ Enforcement actions
➢ Fully document any analytical monitoring utilized including decision process to utilize
analytical monitoring
♦ Provide follow up inspections
Communication and Correspondence:
♦ Stormwater Inspector will communicate with all responsible parties and contractors.
♦ Stormwater Inspector will report to the proper authorities all reportable quantities,
contamination levels, enforcement actions, remediation efforts and results with
documentation.
Employee Training
♦ All applicable employees should be trained in general stormwater pollution prevention;
including how to recognize and report illicit connections, spills and illicit discharges.
Records:
♦ Keep records of all correspondence, responsible parties, cleanup/environmental remediation
efforts and reports.