Serving Northern Virgina / Washington DC Metro Area Customers Since 1987

Soil Evaluation & Perc Testing

Do you have property with one or more of the following limitations or needs? No problem for SES!

perc testing
  • Limited Area
  • Steep slopes
  • Shallow, rocky, clayey, wet or sandy soils
  • High groundwater
  • Sites where the current system has failed
  • Coastal Areas where nutrient removal is required
  • Commercial Properties like Restaurants & Schools
  • Subdivision and Communal Systems

Our Certified and Licensed Professionals ensure the soil investigations are completed in a timely manner and in full compliance with all State & local codes. Mapping, classification and suitability studies for onsite sewage disposal systems are completed with the latest GPS and Auto CAD technologies to better evaluate your property. Saturated hydraulic conductivity testing is standard with SES. Most other forms only employ these methods on large system and commercial sites.

Whether you plan on building on raw land, adding on or a complete tear down & re-build, establishing the location and type of onsite sewage system necessary to handle your plan is an essential element. Call SES and schedule a very affordable initial consult on your property and we'll get you headed in the right direction. Use SES to complete the work and we'll apply 1/2 of your initial consult fee to your final invoice. Most initial consults can be scheduled within two weeks.

SES Company


  • Virginia Onsite Wastewater Recycling Association
  • National Onsite Wastewater Recycling Association
  • Water Environment Federation
  • Virginia Association of Counties
  • Northern Virginia Building Industry Association
  • Design Build Institute of America
  • Better Business Bureau
  • Dulles Area Realtors Association
  • Prince William Regional Chamber of Commerce

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Responsible Management Entity

SES is one of only three businesses to be licensed as a Responsible Management Entity. Loudoun County Virginia was the first in the Nation to establish requirements for an RME based on EPA recommendations. SES manages several communities required to have an RME.

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  • Licensed Conventional & Alternative Onsite Soil Evaluators (AOSE)
  • Licensed Conventional and Alternative Onsite Sewage System Operators
  • Licensed Conventional and Alternative Onsite Sewage System Installers
  • NSF Certified Septic System Inspectors
  • Virginia Class A Contractors License
  • Environmental, Monitoring Well and SDS Endorsements
  • Licensed Sewage Handler
  • Licensed Wastewater Treatment Plant Operators
  • Licensed Water System Operators

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