45
A.2
Standard Operating Procedure for:
IDDE: Long-Term Inspections
Purpose of SOP: | To provide supervisor and field crew with a punch list of things to remember during
regularly scheduled inspections.
Always:
é
é
Conduct inspections during dry weather periods.
Check the outfall’s dimensions, shape, and component material using the Storm Drain
Characteristic Form.
Characterize and record observations on basic sensory and physical indicators (e.g., odor,
color, oil sheen).
if an illicit discharge is encountered (such as raw sewage, paint, etc.), follow the procedure
below.
Whenever Possible:
o
é
o
Never:
Perform inspections of all the outfalls at least once per permit cycle (long term).
Photograph the outfall with a digital camera (use dry erase board to identify outfall).
Identify and label the outfall with a unique identifier. For example “SWO-013".
Carry a letter of authorization with you during inspections that outline who you are and what
you are doing.
lf dry weather flow is present at the outfall, and the flow does not appear to be an obvious
illicit discharge (e.g., flow is clear, odorless, etc.), attempt to identify the source of the flow
(intermittent stream, etc.) then document the discharge for future comparison.
Collect samples before and after source removal. Contact NHDES for technical assistance.
Never put yourself in danger.
Never enter private property without permission.
Procedures to follow if illicit discharge is detected:
a Call dispatch / supervisor.
a Document observations using the Dry Weather Outfall Inspection Form.
o Visually inspect general area for possible sources.
O Take photos.
oO Estimate flow/collect samples if instructed to do so.
A-5
Hic it Discharge Detection and Himination Plan 45
