Mae'n bwysig nodi bod nifer o ffactorau'n dylanwadu ar sut y caiff yr atebolrwydd am dir halogedig ei adnabod, ei briodoli a'i rannu. Er mwyn i dir (gan gynnwys hen safleoedd tirlenwi/gwastraff diwydiannol) gael ei ystyried yn dir halogedig o dan Ran 2A Deddf Amgylchedd 1990, rhaid iddo fodloni ar ôl archwiliad y diffiniad a geir yn y Ddeddf. Hyd yn oed wedyn, ceir nifer o ffactorau fydd yn effeithio ar adnabod y person sy'n atebol am adfer y tir, a sut y caiff yr atebolrwydd hwnnw ei briodoli a'i rannu i'r person atebol. Lle nodir bod y tir wedi'i halogi, bydd yr awdurdod gorfodi'n ystyried amgylchiadau pob achos unigol wrth arfer ei swyddogaethau i bennu'r gofynion adfer a'r costau cysylltiedig (cewch fanylion pellach yn y Canllaw Statudol i Gymru ar Dir Halogedig 2012(1)). Cloriennir pob achos yn ôl ei ffeithiau. Dylai unrhyw un sy'n bryderus ynghylch goblygiadau posib dyfarniad y Llys iddynt hwy ystyried gofyn barn gyfreithiol am eu hamgylchiadau penodol a siarad â'r awdurdod lleol.
It is important to note the identification, attribution and apportionment of contaminated land liabilities is influenced by a variety of factors. Land (including legacy industrial waste disposal/landfill sites), will only become contaminated land for the purposes of Part 2A of the Environment Act 1990 if, upon investigation, it satisfies the definition set out in the Act. Even then, there will be a number of factors which will affect the identification of the person(s) liable to remediate the land, and also the attribution and apportionment of liabilities to the liable person(s). Where land is identified as contaminated land, enforcing authorities will have regard to the circumstances of each individual case when exercising their functions in relation to remediation requirements and the associated costs (further details can be found within the Contaminated Land Statutory Guidance for Wales 2012(1)). Each case should be considered on its own facts. Anyone who is concerned about the potential implications of the Court judgment for them should consider seeking legal advice on their specific circumstances, and talking to their local authority.