In order to ensure consistency in how CEMS Data Acquisition Systems (DAS) are programmed to deal with breaks in operation for a source with a multi-hour rolling or block average emission limit, EMS wrote a CEMS averaging policy to provide guidance and clarification on how to calculate these averages.  This policy has been posted on our website at https://www.nj.gov/dep/bts/consult.html under Technical Manuals.

Note that exceedance reporting is outside the scope of this policy.  Please refer to https://www.nj.gov/dep/enforcement/advisories/2021-09.pdf?utm_medium=email&utm_source=govdelivery for further guidance on exceedance reporting and deadlines for updating DAS programming, if necessary.