These MTD (Manufactured Treatment Device) stormwater technologies have been tested to NJDEP published testing protocols and their performance verified by NJCAT and certified by NJDEP. Therefore, these MTDs are approved and accepted for use in NJ to meet current NJDEP stormwater rules. The NJDEP laboratory testing protocols for Hydrodynamic Sedimentation MTDs (January 1, 2021) and Filtration MTDs (January 14, 2022) were both revised to strengthen the 2013 protocols and capture lessons learned from protocol implementation. A major change in the program was to require all Hydrodynamic Sedimentation MTDs to be retested within 5 years of prior certification to demonstrate compliance with the mass capture sediment testing requirement in the 2021 protocol, since it was decided that this approach yields a more accurate comparison of MTD performance. These technologies with their respective certification expiration dates are listed at www.njstormwater.org. The 2022 Filtration MTD protocol primarily captured interpretations to the 2013 Filtration protocol that were already integrated into the performance testing program, and therefore, NJDEP decided not to require retesting of already certified Filtration MTDs since the verified performance would not be appreciably changed. There are three categories of NJDEP certified stormwater technology MTDs as shown.

GI MTDs are required to (1) infiltrate into the subsoil; and/or (2) treat stormwater runoff through filtration by vegetation or soil. NJDEP makes the GI determination following receipt of the NJCAT verification report.

HDS MTDs treat stormwater by enhancing particulate sedimentation.

Filtration MTDs treat stormwater by filtering particulates thru a media, membrane, or fabric filter.

Eight (8) HDS MTDs were tested to modifications of the 2013 NJDEP protocols, e.g., a coarser PSD (6), or used effluent grab sampling to assess PSD removal efficiency within various PSD ranges (2). All eight HDS MTDs desiring continued NJCAT verification will require testing to the 2021 HDS protocol during 2023-2024. Five (5) MTDs are special applications of sediment filtering but are not considered by NJDEP as candidates for certification, e.g., BioFilter, MLS Inlet Filter, Isolator Row PLUS.

The verification/certification process requires that all NJCAT MTD verification reports seeking NJDEP certification be subjected to a public review process, and all comments be resolved prior to finalization of the reports. Technologies listed below are currently undergoing public comment. When all public comments have been addressed and resolved, the technology will be verified by NJCAT and sent to NJDEP for certification.

In accordance with the EETV Act and the respective NJDEP regulations, NJCAT has been asked to verify the performance of several non-stormwater technologies seeking approval for regulatory use in New Jersey. The protocols used for verifying the performance of such technologies are developed through a collaborative process with NJDEP and the respective applicants. NJCAT verifies performance and NJDEP issues a letter granting regulatory acceptance. The technologies that have been approved through this process are as follows: