for Compliance

Sniffer Robotics provides manual surface emissions monitoring (SEM) used to monitor landfill gas emissions in compliance with New Source Performance Standards (NSPS) and 40 CFR Part 60, Subpart WWW.  Sniffer Robotics also provides manual services to comply with new emission guidelines specified within Subpart Cf and Standards of Performance for Municipal Solid Waste Landfills under 40 CFR Part 60, Subpart XXX.

Sniffer Robotics technicians are required to walk the landfill to visually inspect the site while monitoring fugitive gas emissions with a hand-held detector.  The methane emission concentrations are measured and manually collected using a detector compliant to 40 CFR Part 60, Subpart WWW Appendix A (Method 21).  Emissions above 500 ppm are flagged and reported.  Subsequent inspections are required for 10-day, 10-day and 30-day for exceedances found during the initial inspection. 


Inspection reports are provided to the customer at the end of each daily inspection.  The report contains:


  • Methane concentration (PPM)

  • GPS coordinates

  • Further location details (e.g. distance to gas well)

  • Potential cause and/or suggested corrective action

  • Photograph of exceedance location

  • Additional notes


At the end of the 30-day inspection, a formal report is provided for regulatory compliance purposes.

SEM details are also reported in SnifferVIEW™ for customer viewing.  This online, secure portal provides rich data and imagery within a dynamic mapping tool and can be used operationally to aid in onsite remediation and monitor remediation performance. 


SEM data can further be combined with advanced imagery and additional data collection services for a complete landfill cover integrity assessment.  

Walking path of an SEM technician (GPS coordinates recorded as purple dots). 


330 E Liberty St.., 
Ann Arbor, MI 48104  

Phone:  (855) 476-4333 

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