Regional Screening Levels (RSLs) - Equations
To download the most recent Regional Screening Level tables, please go to the Generic Tables page. For assistance/questions please use the RSL Contact Us page.
The Regional Screening Level (RSL) Equations Page provides quick access to the equations used in chemical risk assessments. The equations contain the defaults for the exposure parameters.
- Resident
- Composite Worker
- Outdoor Worker
- Indoor Worker
- Construction Worker
- Recreator
- Fish Ingestion
- Soil to Groundwater
- Supporting Equations
Resident
Resident Soil
This land use is for developing residential default screening levels that are presented in the RSL Generic Tables.
- Noncarcinogenic-child
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Noncarcinogenic-adult
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Mutagenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Vinyl Chloride
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Trichloroethylene
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Supporting Equations
- Child
- Adult
- Age-adjusted
- Child
Resident Tap Water
This land use is for developing residential default screening levels that are presented in the RSL Generic Tables.
- Noncarcinogenic-child
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Noncarcinogenic-adult
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Mutagenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Vinyl Chloride
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Trichloroethylene
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Supporting Equations
- Child
- Adult
- Age-adjusted
- Child
Resident Air
This land use is for developing residential default screening levels that are presented in the RSL Generic Tables.
- Noncarcinogenic
- Inhalation
- Inhalation
- Noncarcinogenic - Refractory Ceramic Fibers
- Inhalation
- Inhalation
- Carcinogenic
- Inhalation
- Inhalation
- Mutagenic
- Inhalation
- Inhalation
- Vinyl Chloride
- Inhalation
- Inhalation
- Trichloroethylene
- Inhalation
- Inhalation
Composite Worker
Composite Worker Soil
This land use is for developing industrial default screening levels that are presented in the RSL Generic Tables.
- Noncarcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
Composite Worker Air
This land use is for developing industrial default screening levels that are presented in the RSL Generic Tables.
- Noncarcinogenic
The air land use equation, presented here, contains the following exposure routes:- Inhalation
- Inhalation
- Noncarcinogenic - Refractory Ceramic Fibers
- Inhalation
- Inhalation
- Carcinogenic
The air land use equation, presented here, contains the following exposure routes:- Inhalation
- Inhalation
Outdoor Worker
Outdoor Worker Soil
The outdoor worker soil land use is not provided in the RSL Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
Outdoor Worker Air
The outdoor worker air land use is not provided in the RSL Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic
The air land use equation, presented here, contains the following exposure routes:- Inhalation
- Inhalation
- Noncarcinogenic - Refractory Ceramic Fibers
- Inhalation
- Inhalation
- Carcinogenic
The air land use equation, presented here, contains the following exposure routes:- Inhalation
- Inhalation
Indoor Worker
Indoor Worker Soil
The indoor worker soil land use is not provided in the Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic
- Ingestion
- Inhalation
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Inhalation
- Total
- Ingestion
Indoor Worker Air
The indoor worker air land use is not provided in the RSL Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic
The air land use equation, presented here, contains the following exposure routes:- Inhalation
- Inhalation
- Noncarcinogenic - Refractory Ceramic Fibers
- Inhalation
- Inhalation
- Carcinogenic
The air land use equation, presented here, contains the following exposure routes:- Inhalation
- Inhalation
Construction Worker
Construction Worker Soil Exposure for Standard Vehicle Traffic
The construction worker soil land use is not provided in the Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
Construction Worker Soil Exposure for Other Construction Activities
The construction worker soil land use is not provided in the Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
Recreator
Recreator Soil/Sediment
The recreator soil land use is not provided in the Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic - Child
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Noncarcinogenic - Adult
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Mutagenic
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Vinyl Chloride
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Trichloroethylene
- Ingestion
- Dermal
- Inhalation
- Total
- Ingestion
- Supporting Equations
- Child
- Adult
- Age-adjusted
- Child
Recreator Surface Water
The recreator surface water land use is not provided in the Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic - Child
- Ingestion
- Dermal
- Total
- Ingestion
- Noncarcinogenic - Adult
- Ingestion
- Dermal
- Total
- Ingestion
- Carcinogenic
- Ingestion
- Dermal
- Total
- Ingestion
- Mutagenic
- Ingestion
- Dermal
- Total
- Ingestion
- Vinyl Chloride
- Ingestion
- Dermal
- Total
- Ingestion
- Trichloroethylene
- Ingestion
- Dermal
- Total
- Ingestion
- Supporting Equations
- Child
- Adult
- Age-adjusted
- Child
Fish Ingestion
The ingestion of fish land use is not provided in the Generic Tables but RSLs can be created by using the Calculator.
- Noncarcinogenic
- Carcinogenic
Soil to Groundwater
This land use is for developing default soil screening levels for the protection of groundwater that are presented in the RSL Generic Tables.
- Method 1
- Method 2
- Dilution Factor
Supporting Equations
Wind Particulate Emission Factor
Mechanical Particulate Emission Factor for Construction Worker from Vehicle Traffic on Unpaved Roads
Mechanical Particulate Emission Factor for Construction Worker from other than Vehicle Traffic on Unpaved Road
Wind Volatilization Factors
Diffusivity in Water
Diffusivity in Air
Mass Limit Volatilization Factor
Unlimited Source Subchronic Volatilization Factor for Construction Worker
Mass Limit Subchronic Volatilization Factor for Construction Worker
Dermal Contact with Water Supporting Equations
EPD
Kp
FA
B
Tau
t*
Soil Saturation Limit
TCE Toxicity Adjustment Factors
Determination of Henry's Law Constant at Groundwater Temperature other than 25 °C
Determination of Vapor Pressure at Groundwater Temperature other than 25 °C
For assistance/questions please use the Regional Screening Levels (RSLs) contact us page. For general risk assessment questions, separate from the RSLs, please use the link below.