NJDEP Announces new Acting Deputy Commissioner and Acting Assistant Commissioner

Posted on September 11th, 2013

At NJDEP’s offices in Trenton, two new leadership roles were announced...more

JM Sorge’s Jim Vander Vliet to Present Vapor Intrusion Seminar at Build Expo NY

Posted on September 10th, 2013

Join the JM Sorge Senior Engineer at Build Expo NY on October 22 as he discusses Understanding Vapor Intrusion & Commercial Development....more

Volatile Organic Compounds’ Impact to Groundwater

Posted on September 9th, 2013

In June 2008 when the NJDEP released the new Soil Remediation Standards (SRS) (7:26D), it released revised residential direct contact (RDC) and nonresidential direct contact (NRDC) SRS. At the same time, the NJDEP also released default Impact to Groundwater Soil Screening Levels (IGW SSLs). While the NJDEP default IGW SSLs were not specifically promulgated, 7:26D did propose these levels, and accepted that site-specific IGW SRS could be developed. Several methods were provided to complete this task, including Soil-Water Partition Equation (SWPE), Synthetic Precipitation Leaching Procedure (SPLP), vadose zone model and Dilution Attenuation Factor (SESOIL/DAF), and groundwater transport models (SESOIL/AT123D or SESOIL/MODFLOW-MT3D). NJDEP also provided the Immobile Contaminants guidance document for the constituents that are highly adsorbed. The NJDEP provided guidance for these methods, and they were used with some success. However, when none of these methods were successful, the NJDEP default IGW SSL was to be used. Because the IGW pathway could not be addressed through a deed notice or other institutional or engineering control, and because the NJDEP default IGW SSLs are so low, the IGW pathway began to drive many remediations....more

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