The Relative Accuracy Test Audit (RATA) is a crucial on-site performance evaluation of a CEMS. It is performed to verify the accuracy and reliability of the CEMS's readings by comparing them to an independent, more accurate measurement method (a reference method). RATA is a mandatory periodic test typically conducted annually or bi-annually to ensure the CEMS remains compliant with regulatory requirements and produces verifiable data.
USEPA 40 CFR Part 60
This US federal regulation mandates the use of CEMS and outlines the performance specifications and ongoing quality assurance procedures. RATA is the key component of this framework, ensuring CEMS provide data that is accurate and defensible for compliance reporting.
USEPA Performance Specification 2 (PS2)
This specific USEPA standard details the procedures for conducting a RATA. It outlines the test protocol, performance criteria, and calculations to determine the relative accuracy of the CEMS, which must fall within a specified range for the system to be considered compliant.
SRM Methods
The RATA involves a series of parallel measurements where CEMS readings are compared against a Standard Reference Method (SRM). We utilize methods from standards such as USEPA Method 3A for O2, CO2, Method 6C for SO2, Method 7E for NOx, and Method 10 for CO, which ensure the highest level of accuracy and regulatory acceptance for your audit.
We bring global standards and USEPA methods to your doorstep. Our team of experts understands both international best practices and the specific requirements in the context of Indian tropical conditions, as well as Indian regulatory requirements.
Our RATA services include a full suite of on-site performance audits, conducted strictly in accordance with USEPA protocols, to ensure your CEMS is performing accurately and reliably for international compliance
Our services provide independent, third-party assurance of your CEMS's accuracy and reliability, which is essential for building trust and credibility with international clients and regulatory bodies.
By ensuring your CEMS is properly audited and compliant with international standards, we help you avoid potential fines, legal issues, and operational shutdowns that can result from inaccurate or unvalidated emissions data.
Quality is at the heart of everything we do.
ISO/IEC 17025 Accreditation: We are an ISO/IEC 17025 accredited testing laboratory by the International Accreditation Service (IAS, USA), an ILAC member, a globally recognized body. This is the standard for labs worldwide, proving our technical competence and ability to produce precise and accurate data. It also validates our technical capabilities and the international acceptance of our test reports.