Municipal Stormwater Specialists

MS4 Field Services

Boots-on-the-ground field services for your MS4 permit. Outfall screening, dry weather monitoring, illicit discharge detection, and infrastructure inspections — all documented for Ohio EPA reporting.

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Field Services

MS4 Permit Field Work

We serve as the field arm of your MS4 program — conducting the inspections, screenings, and monitoring that Ohio EPA requires while delivering audit-ready documentation.

Outfall Screening & Monitoring

Systematic outfall evaluation per MS4 permit requirements:

Dry weather screening of all outfalls
Visual observation and field testing
pH, conductivity, and turbidity testing
Flow measurement and characterization
Priority outfall identification
GIS mapping of all discharge points

Illicit Discharge Detection

IDDE program support from investigation to resolution:

Source tracing using dye and smoke testing
Cross-connection investigation
Sanitary sewer overflow monitoring
Illegal dumping investigation
Enforcement documentation
Resolution verification and follow-up

Infrastructure Inspection

Comprehensive storm sewer system evaluation:

Catch basin and inlet inspection
Storm sewer pipe condition assessment
Manhole inspection and grading
BMP and green infrastructure evaluation
Detention/retention basin assessment
Outfall condition monitoring

Reporting & Compliance Support

We compile your MS4 annual report from our field data:

Six minimum control measure documentation
Annual report data compilation
Measurable goals tracking
Public education program support
Good housekeeping documentation
Permit renewal assistance

FAQ

Frequently Asked Questions

What are the six minimum control measures?

The six MCMs are: (1) Public Education & Outreach, (2) Public Participation, (3) Illicit Discharge Detection & Elimination, (4) Construction Site Runoff Control, (5) Post-Construction Stormwater Management, and (6) Good Housekeeping.

How often do outfalls need to be screened?

Most Ohio MS4 permits require screening of all known outfalls at least once during the permit term (5 years), with priority outfalls screened annually. We develop a screening schedule that meets your specific permit requirements.

Can you take over our entire MS4 field program?

Yes. Many municipalities contract with us for all field components of their MS4 program, including outfall screening, IDDE investigations, catch basin inspections, and BMP evaluations. We handle the field work and reporting.

What is dry weather screening?

Dry weather screening involves inspecting outfalls during periods without rainfall (typically 72+ hours dry) to identify non-stormwater discharges that may indicate illicit connections, sanitary overflows, or other prohibited discharges.