The Continuous Emission Monitoring (CEM) Program
is responsible for the quality assurance of data generated
through the use of permit required CEMs at New Jersey
facilities. The goal of the program is to provide reliable,
accurate and dependable data to be used by NJDEP, the
public and industry.
When a facility is required to install a CEM, either
by its Air Permit, a regulation or as the result of
an enforcement action, oversight is provided by the
BTS. There are four main elements to the CEM approval
- Equipment Protocol review and approval.
- Certification Test Protocol review and approval.
- Observation of the Certification test.
- Review of the final test report.
In most cases, a test consultant is contracted to prepare
the protocols, perform the test and submit the report.
The equipment protocol is a source specific document
which details the proposed equipment to be included
in the CEM system. BTS reviews the equipment protocol
to ensure that the proposed equipment is capable of
providing reasonably accurate data. Deficiencies are
identified and must be corrected before BTS will approve
proceeding to the next step in the approval process.
Certification Test Protocol
The certification protocol is a source specific test
plan that details how the equipment, once installed,
will be initially tested for accuracy. It identifies
the test methods and performance specifications that
will be used, as well as how they will be adapted to
meet the source specific conditions. BTS reviews the
certification protocol to ensure that both the most
appropriate methods and performance specification were
proposed and that they are being applied properly to
the specific source. Deficiencies are identified and
must be corrected before BTS will approve initiating
the actual testing.
Scheduling a Test
Once both protocols have been approved, a mutually acceptable
test date is established. The certification test is
then conducted (sometimes with BTS oversight) to ensure
adherence to the protocol.
Upon completion of testing, a final test report is prepared
and submitted to BTS for evaluation. The test report
must include copies of all raw field and laboratory
data so that BTS staff can verify that all procedures
were followed and can confirm the calculations of the
For More Information
For more detailed explanation of how one goes about
installing and certifying a CEM system, please download
Technical Manual 1005,(in .pdf
format), "Guidelines for Continuous Emissions
Monitoring Systems (CEMS) and Continuous Opacity Monitoring
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