Finite Source Calculator

The Finite Source Correction Factor calculator was developed for an internship with U.S. EPA Office of Land and Emergency Management studying potential updates to the soil-to-groundwater pathway Soil Screening Level (SSL). To convert between an infinite-source SSL and a finite-source SSL, simply multiply the infinite-source dilution attenuation factor by the correction factor.

Chemical Specific

Chemical Name Values for PFAS and PFOAS are provisional and included solely for demonstration.

Optional:

The dropdown menu automatically updates the following values, so you only need to enter them manually if they differ from those stored in the database.

K_oc Liters per kilogram

Chemical Density Kilograms per liter

Retardation Factor Unitless. The retardation factor calculator can be found here.

Site Specific

Organic Carbon Fraction Number between 0 and 1

Infiltration Rate Meters per year

Length to Receptor Well Meters

Depth to Aquifer Meters

Fraction of Waste in the Landfill Number between 0 and 1

Groundwater Velocity Meters per year

Result

The finite-source correction factor for none selected is 1.0.