This tender invites qualified contractors to provide testing services for Environmental Health & Safety (EH&S) parameters in compliance with the National Environmental Quality Standards (NEQS) at Pakistan State Oil's Operations in the North Zone. The scope requires precise laboratory analysis to ensure operational compliance with environmental regulations, safeguarding both the environment and public health. The work involves collecting and testing samples from various operational sites within the North Zone. Contractors must demonstrate experience in environmental testing, with capabilities to handle complex parameters as per NEQS. The testing will be conducted through a rigorous two-envelope bidding process via the SAP Ariba portal, ensuring transparency and technical compliance. Bidders should ensure they hold valid PEC categories relevant to environmental testing and maintain active FBR/ATL status for the financial year 2025-26. It is advisable to prepare all documentation including NTN, GST/PST certificates, and CNICs of authorized representatives to meet eligibility criteria. The submission deadline is set for 28th January 2026 at 14:15 hours, with bid opening scheduled the same day at 15:00 hours via the SAP Ariba portal. Interested parties must request tender documents through the portal by uploading a signed and stamped letter on official letterhead, clearly mentioning the tender number. Pro-Tip: Carefully review the SAP Ariba portal instructions for document submission to avoid disqualification. Pay special attention to the Earnest Money and Call Deposit Receipt (CDR) requirements, as these are commonly overlooked in environmental service tenders.