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• Fillable SPPP Template
• Sample SPPP
• Sample Municipal Stormwater Management Plan
• Fueling Mock-Up Sign
• Fueling Mock-Up Sign PDF

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• Fillable SPPP Template
• Sample SPPP
• Post Construction Program Design Checklist for Individual Projects

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• Fillable SPPP Template
  
• Sample SPPP
• Attachment D – Major Development Project List
• New Development Checklist
• Post Construction Program Design Checklist for Individual Projects

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Outfall Inspections

Outfall inspections are a vital part of managing a permittee’s stormwater program; they help to identify broken infrastructure, illicit connections and stream-scouring occurrences.

Outfall inspections are required to occur at specific intervals. For Tier A and Highway permittees, each outfall must be inspected at least once every five years, with a minimum of 20% of all outfalls being inspected yearly. Public Complexes are required to inspect all outfalls once per year.

The Department has created an outfall inspection form that permittees can use to make inspections easier. The form collects key information such as inspection date, outfall location, flow conditions, and signs of potential illicit discharges like unusual odors, discoloration, or structural damage.[/vc_column_text][vc_column_text css=”.vc_custom_1752696365735{border-color: #000000 !important;}”]

Outfall, Illicit and Stream Scouring Inspection Forms

• Outfall Inspection Form
• Illicit Connection Inspection Report Form 
• Stream Scouring Investigation Recordkeeping Form

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Stream Scouring

Stream scouring is the erosion or removal of a streambed or bank material by the physical action of flowing water and the sediment that it carries. Excessive stream scouring poses significant environmental and economic concerns. This process disrupts habitats, adversely affects aquatic organisms, and degrades water quality. Additionally, it can damage nearby property and infrastructure, highlighting the importance of managing stream health effectively.

It is required for permittees to have a program to detect, investigate, and control any localized stream scouring.

Signs of Stream Scouring:

• Exposed root
• Undercut Banks
• Increased water turbidity
• Collapse of river banks
• Deep cuts around the outfall(seen in the picture below to the right)
• Winding of the bank
• Steepening bank angles

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Illicit Connections 

Illicit discharges are any physical or non-physical connection that discharges the following to a municipal separate storm sewer system:​

1. Domestic sewage;​
2. Non-contact cooling water, process wastewater, or other industrial waste (other than stormwater);​
3. Any category of non-stormwater discharges that a permittee for the MS4 identifies as a source or significant contributor of pollutants​

​Dry weather flow – flow occurring 72 hours after a rain event is evidence of a potential illicit discharge. If you are unsure if what you see is an illicit discharge, report it, and it can be investigated further.

Not all illicit discharges are obvious as bright orange or super fragrant smells. If there is dry weather flow, it should be treated as an illicit discharge until proven otherwise. Some sources of illicit discharge include, but are not limited to, sanitary wastewater, effluent from septic tanks, car wash wastewaters, improper oil disposal, radiator flushing disposal, laundry wastewater, spills from roadway accidents, and disposal of auto and household toxins.

Signs of Illicit Discharges:

• Dry Weather Flow
• Unnatural Foam
• Unnatural Oil, sheen on the surface
• Fragrant smells
• Sewage Smells
• Discolored Water
• Excess Algae Growth

[/vc_column_text][vc_row_inner][vc_column_inner width=”1/2″][vc_single_image image=”9160″ img_size=”800×400″ add_caption=”yes” alignment=”center” css=””][/vc_column_inner][vc_column_inner width=”1/2″][vc_single_image image=”9161″ img_size=”800×400″ add_caption=”yes” alignment=”center” css=””][/vc_column_inner][/vc_row_inner][vc_column_text css=””]Some illicit discharge could look like naturally occurring oil or naturally occurring foam. It is important to look to know the differences between naturally occurring foam and oil and unnatural foam and oil. When in doubt, treat it as an illicit connection and do an inspection form.[/vc_column_text][/vc_column][/vc_row][vc_row equal_height=”yes”][vc_column width=”1/4″][info-box-shortcode bgimg=”9164″]Unnatural foam

• Likely to have a fragrant order
• Be sudsy/soapy in appearance
• Bright white color

[/info-box-shortcode][/vc_column][vc_column width=”1/4″][info-box-shortcode bgimg=”9165″]Naturally Occurring Foam

• Off-white color
• Does not last long
• “Fishy” or “earthen” odor
• Found in waters with high levels of organic debris

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• Iridescent appearance on the  surface of the water
• Gas and petroleum smell
• Sticks together and swirls when disturbed

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• Will break into angled portions when disturbed
• Will not last long

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Underground Vehicle Wash Water Storage Tank Use Forms

These files are for those permittees who have underground vehicle wash water storage tank forms.

The MS4 permit requires that each volumetric measurement be measured and recorded to the nearest ½ inch using the
“Underground Vehicle Wash Water Storage Tank Use Log” form.

A log of equipment and vehicle wash wastewater containment structure pump-outs (removes only water) and clean-outs (removes all water and sludge) shall be maintained that includes the date and method of removal, mode of transportation (including name of hauler if applicable) and the location of disposal.

Underground Vehicle Wash Water Storage Tank Use Forms

• Engineer’s Certification of Annual Inspection of Equipment and Vehicle Wash Wastewater Containment Structure
• Underground Vehicle Wash Water Storage Tank Pump Out Log
• Underground Vehicle Wash Water Storage Tank Use Log

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