Fastsættelse af grænseværdier for PAH i jord: Determination of Quality Criteria for PAH in Soil

Helene Nørgaard Bachmann, Jakob Mikael Espersen, Andreas Clipet-Jensen, Larsen Aagaard Ida & Nielsen Louise

Studenteropgave: Semesterprojekt

Abstrakt

In 2005 the limit concentrations of PAH in soil were raised as a part of a major change in the soil contamination law. Through this report we intend to explore the scientific background for the raise, while the background for the law change will be described. Therefore, some theory about the chemical and physical properties of PAH will be explained along with their adverse health effects. BaP being used as a marker for PAH will also be discussed. The principles of soil quality criterions as well as the previously used methods will be discussed including an explanation of animal testing, dose-response curve, TDI (Tolerable Daily Intake), exposure level and background level. The new method used to determine the existing soil quality criteria based on the modified-BMD will be deepened and the economic impact of the amendment will be reviewed briefly. In addition, a calculation of soil quality criteria of BaP based on BMDL10 instead of modified-BMD, will be carried out. Since it is discussed whether these substances have a threshold or not, there will also be a discussion about threshold and carcinogenity It concludes that the current available methods for calculating soil criterions are subject to many uncertainties. These are due to the absence of adequate data, extrapolation and determination of assessment factors and standard values. Ultimately, these are not health-based but administratively decided.

UddannelserBasis - Naturvidenskabelig Bacheloruddannelse, (Bachelor uddannelse) Basis
SprogDansk
Udgivelsesdato15 jan. 2009
VejledereCarlsen Lars

Emneord

  • NO(A)EL
  • Quality Criteria
  • PAH
  • Soil
  • BMD
  • TDI
  • NEC
  • LO(A)EL