Development of Site-Specific Impact to Ground Water Soil Remediation Standards Using the Soil-Water Partition Equation

This guidance describes the use of the Soil-Water Partition Equation to develop site-specific impact to ground water (IGW) soil remediation standards. A modified version of the USEPA Soil Screening Level (SSL) Soil-Water Partition Equation (USEPA, 1996b, Equation 24) may be used to calculate site-specific IGW soil remediation standards for mobile contaminants. The Department expanded Equation 24 to separate the target leachate concentration discussed in the USEPA SSL guidance document into its component parts. The target leachate concentration is the product of the health-based ground water criterion (Cgw), and the dilution-attenuation factor (DAF). This modification allows the Department's health-based Ground Water Quality Criterion to be directly entered as an input parameter. The Soil-Water Partition Equation back-calculates a concentration in soil from an acceptable ground water concentration.NJDEP Site Remediation Program: Remediation Standards Guidance DocumentsSee NJEDL Record ID 5263 for the calculation spreadsheetPurpose: To provide guidance to remediating parties on the use of synthetic precipitation leaching procedur