Each category of documents typically found in an EPC contractor's dossier:

1. Project Plans and Specifications: This section encompasses detailed plans outlining the entire project's scope, objectives, schedule, budget, and technical specifications. It includes documents such as project execution plans, project management plans, engineering design basis documents, and any other overarching documents that define how the project will be executed.
2. Engineering Documents: These documents form the backbone of the project, detailing the technical aspects of the design and construction. They include drawings (such as P&IDs, electrical schematics, civil drawings, etc.), calculations (structural, hydraulic, electrical, etc.), technical specifications for materials and equipment, design reports, and any other engineering deliverables specific to the project.
3. Procurement Documents: This section contains records related to the procurement of materials, equipment, and services required for the project. It includes contracts with suppliers and subcontractors, purchase orders, invoices, shipping documents, material requisitions, material certifications, inspection reports for received goods, and records of any procurement-related communications.
4. Construction Documents: These documents track the progress of construction activities and ensure compliance with design specifications and regulatory requirements. They include construction permits, method statements, risk assessments, daily construction reports, inspection reports, test results, progress photos, records of safety meetings, and documentation of any deviations or changes to the original construction plans.
5. Health, Safety, and Environmental (HSE) Documents: This section focuses on ensuring the health, safety, and environmental compliance of the project. It includes safety plans, hazard assessments, environmental impact assessments, permits, incident reports, records of safety training, emergency response plans, and documentation of compliance with relevant health, safety, and environmental regulations.
6. Quality Assurance and Quality Control (QA/QC) Documents: These documents ensure that the project meets specified quality standards and requirements. They include quality management plans, inspection and test plans, inspection checklists, records of inspections and tests performed, non-conformance reports, corrective and preventive action reports, material certificates, and any other documentation related to quality assurance and quality control activities.
7. Contractual Documents: This section includes all legal documents related to the project, including the EPC contract itself, subcontract agreements, change orders, variation orders, claims and disputes documentation, warranties, indemnities, insurance certificates, and any other contractual agreements or correspondence relevant to the project.
8. Project Correspondence: This section contains all communications between the EPC contractor, client, suppliers, subcontractors, regulatory authorities, and other stakeholders involved in the project. It includes meeting minutes, emails, letters, memos, requests for information (RFIs), and any other written or electronic correspondence related to the project.
9. Progress Reports: These reports provide regular updates on the project's progress, including milestones achieved, work completed, work in progress, issues encountered, risks identified, and actions taken to address them. Progress reports may be submitted weekly, monthly, or at other intervals specified in the project management plan.
10. As-Built Documentation: This section contains final documentation reflecting the actual state of the project upon completion, including any modifications or deviations from the original design. It includes record drawings, redlined drawings showing as-built changes, specifications reflecting as-built conditions, operation and maintenance manuals, spare parts lists, and any other documentation needed for the client to operate and maintain the completed project.

By maintaining a comprehensive dossier with all these documents, an EPC contractor ensures proper documentation, traceability, and accountability throughout the project lifecycle, helping to mitigate risks, manage changes, and ultimately deliver a successful project to the client.