Standard Operating Procedure for:
A.1 IDDE: Inspections During Mapping
Purpose of SOP:
inspections during mapping.
This SOP provides a basic checklist for managers and field crews conducting illicit discharge
Always:
@ Characterize the outfall by recording information on the Storm
Drain Characteristic Form.
4 Conduct inspections during dry weather periods using the Dry
Weather Outfall Inspection Form.
4 Follow procedure below if an illicit discharge is encountered
(such as raw sewage, paint, etc...
4 Conduct inspections with at least two staff per crew.
@ Carry a list of emergency phone numbers.
Whenever Possible:
¢@ Conduct inspections during low groundwater and leaf off
conditions.
@ Photograph the outfall with a digital camera (use dry erase or
chalk board to identify outfall).
4 = Identify and label the outfall with a unique identifier. For
example “SWO-013".
4 If dry weather flow is present at the outfall, and the flow does
not appear to be an illicit discharge attempt to identify the
source of the flow (intermittent stream etc.), then document the
discharge for future comparison.
Carry an authorization letter.
Ld
4 Collect samples of flowing discharges before and after source
removal. (Contact NHDES for technical assistance.)
Never:
@ Never put yourself in danger.
@ Never enter private property without permission
Dry Weather Discharge
The CWP defines dry
weather as a 48 hour period
with no runoff-producing
rainfall. NEIWPCC defines
dry weather as a 48-72 hour
period with less than 1/10-
inch rainfall.
Equipment list for mapping:
Existing paper maps
Field sheels
Camera (preferably digital) on
pole
GPS Unit
Spray paint (or other marker)
Cell phones or
hand-held radios
Clip boards and pencils
First aid kit
Flash light or head lamp
10. Surgical gloves
11. Tape measure
12. Temperature probe
13. Waders
14. Watch with a second hand
15. Five 1-liter sample bottles.
16. Dry erase board (for photos)
17. Hand sanitizer
18. Sampling pole
19, Mirror (for light)
20. Safety vests
Corny DAP WN
Procedures to follow if illicit discharge is detected:
a Call dispatch / supervisor.
Use the Dry Weather Outfall Inspection Form to document observations.
Take photos.
Qo
a Visually inspect general area for possible sources.
Oo
a Estimate fiow/collect samples if instructed to do so.
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Hic it Discharge Detection and Eimination Plan
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