The Gas Protection Verification Accreditation Scheme (GPVS) is a scheme that seeks to raise standards in membrane inspection, verification and reporting and provide all stakeholders involved in land contamination management with confidence that risks associated with ground gases have been adequately managed. The scheme applies to both the practical installation of the gas mitigation measures and to the verification reporting process. Recognising different personnel often undertake inspection and reporting, there are two separate accreditation routes to demonstrate competence  ‘Specialist in Gas Protection Verification’ (SGPV) and ‘Technician in Gas Protection Verification’ (TGPV).