Transparency & Standards
Methodology & Data Sources
This document outlines the emissions factor databases, international standards, verification boundaries, and data assumptions that underpin PureChain's sustainability measurement and reporting systems.
Methodology Philosophy
PureChain's measurement approach is grounded in publicly available, internationally recognized methodologies. We do not maintain proprietary emissions databases or develop custom emission factors without a traceable primary reference.
Our implementation approach prioritizes data traceability — every emissions figure that flows through our systems is linked to a defined factor, a boundary, and a source document. This structure is designed to support third-party verification without requiring organizations to rebuild their data architecture from scratch.
For Indian manufacturing contexts, we apply India-specific emission factors wherever they exist (CEA, BEE) before defaulting to global databases such as IPCC or ECOINVENT.
Emissions Boundary & Scope Structure
Combustion of fuels in owned or controlled stationary and mobile sources. Fugitive emissions from refrigerants and process gases are included where metered data is available.
Electricity purchased from the grid is calculated using the CEA regional grid emission factor (location-based method). Market-based calculations are supported where Renewable Energy Certificates (RECs) or Power Purchase Agreements (PPAs) are in place.
Upstream and downstream emissions estimated using the spend-based, activity-based, or supplier-specific data methods as defined in GHG Protocol Scope 3 Standard. Category applicability is assessed per operation type. BRSR Value Chain disclosures follow SEBI-defined supplier coverage thresholds (75% of procurement/sales value).
Standards & Data Source References
The following frameworks are the primary references for data, calculation methodologies, and reporting structures applied within PureChain systems:
Greenhouse Gas Protocol Corporate Standard
Primary framework for Scope 1, 2, and 3 emissions quantification and boundary setting.
Source: World Resources Institute & WBCSD
IPCC Sixth Assessment Report
Global Warming Potential (GWP) factors for CO₂-equivalent conversions.
Source: Intergovernmental Panel on Climate Change
Central Electricity Authority Grid Emission Factor
India-specific electricity grid emission factors for Scope 2 calculations.
Source: Ministry of Power, Government of India
Bureau of Energy Efficiency
Sectoral energy benchmarks and Perform Achieve Trade (PAT) scheme metrics.
Source: Ministry of Power, Government of India
Business Responsibility and Sustainability Report
Disclosure framework for sustainability reporting for listed Indian entities.
Source: Securities and Exchange Board of India
Carbon Border Adjustment Mechanism
EU regulation governing embedded carbon disclosure requirements for specific import categories.
Source: European Commission
ISO 14064 — Greenhouse Gases
Verification and validation principles for GHG accounting systems.
Source: International Organization for Standardization
Science Based Targets Initiative
Target-setting pathways aligned with 1.5°C Paris Agreement scenarios.
Source: CDP, UN Global Compact, WRI, WWF
Global Reporting Initiative Standards
Comprehensive sustainability disclosure framework covering environmental, social, and governance indicators.
Source: Global Reporting Initiative
Data Quality & Assurance Principles
PureChain applies a hierarchy of data quality preferences consistent with the GHG Protocol's guidance on activity data:
- 1Primary metered data from utility invoices, fuel receipts, and production logs
- 2Supplier-provided data with traceable documentation
- 3Engineering estimates based on known process parameters
- 4Spend-based proxies using industry-average emission intensity factors as a fallback
Audit trails for all data inputs are maintained at the activity level to support Limited Assurance and Reasonable Assurance engagements as defined under BRSR Core requirements.
Operational Disclaimer
PureChain provides measurement, reporting, and system implementation advisory services. Our emissions quantifications are based on client-provided data and publicly available emission factors. PureChain does not issue independent third-party verification statements; these should be obtained from accredited verification bodies as required.
Regulatory compliance requirements vary by jurisdiction, industry sector, and transaction type. Nothing in PureChain's outputs constitutes legal advice or constitutes a guarantee of regulatory compliance. Clients are responsible for ensuring alignment with applicable regulatory requirements in their specific contexts.
Emissions factors and regulatory thresholds are subject to periodic revision by issuing bodies. PureChain updates applied factors on a periodic basis aligned with official publication cycles. Historical calculations use the factor applicable at the time of the reporting period.