## 3 Results
### Relationships between Inorganic and Organic Pollutants
#### 3.2.3 Chemical Pesticides and Herbicides  
There are no significant relationships between Dieldrin and the inorganic pollutants in both the NFSI-1 and the NFSI-2 (Table 5). This seems plausible, since the use of pesticides is less of a causal factor for the heavy metal concentration in the soil, but rather technogenic sources. The relatively close relationships between HCB with inorganic pollutants (Table 6) point in particular to the importance of the technogenic origin of HCB in the state Brandenburg. The corresponding correlation coefficients in the NFSI-2 data set are only slightly \begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline
**PCB\({}_{6}\)** & **As** & **Cd** & **Cr** & **Cu** & **Ni** & **Pb** & **Zn** \\ \hline
**NFSI-1** & & 0.71 ** & 0.56 ** & 0.64 ** & 0.66 ** & 0.78 ** & 0.70 ** \\
**NFSI-2** & 0.72 ** & 0.53 ** & 0.68 ** & 0.70 ** & 0.72 ** & 0.84 ** & 0.24 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Correlation coefficients between PCB6 concentration and the As, Cd, Cr, Cu, Ni, Pb concentrations in the humus layer of Brandenburg NFSI sites, differentiated for data from NFSI-1 (n = 36) and NFSI-2 (n = 50); significance: ** ** \(p\) < 0.01. \begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline  & **Aromatic** & **As** & **Cd** & **Cr** & **Cu** & **Ni** & **Pb** & **Zn** \\ \hline Naphtalin & 2 & 0.81 ** & 0.49 ** & 0.76 ** & 0.70 ** & 0.59 ** & 0.65 ** & 0.04 \\ Acenphthrel & 3 & 0.78 ** & 0.48 ** & 0.76 ** & 0.70 ** & 0.58 ** & 0.64 ** & 0.08 \\ Acenphthrel & 3 & 0.77 ** & 0.52 ** & 0.71 ** & 0.69 ** & 0.65 ** & 0.71 ** & 0.18 \\ Fluoren & 3 & 0.81 ** & 0.47 ** & 0.78 ** & 0.72 ** & 0.62 ** & 0.67 ** & 0.07 \\ Phenanthren & 3 & 0.80 ** & 0.49 ** & 0.74 ** & 0.69 ** & 0.61 ** & 0.67 ** & 0.10 \\ Anthracen & 3 & 0.79 ** & 0.51 ** & 0.75 ** & 0.73 ** & 0.62 ** & 0.70 ** & 0.14 \\ Fluoranthen & 3 & 0.80 ** & 0.53 ** & 0.74 ** & 0.72 ** & 0.64 ** & 0.73 ** & 0.17 \\ Pyren & 4 & 0.80 ** & 0.50 ** & 0.74 ** & 0.71 ** & 0.62 ** & 0.72 ** & 0.17 \\ Benz(a)anthracen & 4 & 0.75 ** & 0.49 ** & 0.68 ** & 0.73 ** & 0.65 ** & 0.78 ** & 0.25 \\ Chrysen & 4 & 0.76 ** & 0.58 ** & 0.69 ** & 0.77 ** & 0.69 ** & 0.79 ** & 0.31 * \\ Benzo(b)fluoroanthen & 5 & 0.75 ** & 0.54 ** & 0.66 ** & 0.74 ** & 0.69 ** & 0.80 ** & 0.26 \\ Benzo(k)fluoroanthen & 5 & 0.75 ** & 0.53 ** & 0.68 ** & 0.75 ** & 0.68 ** & 0.78 ** & 0.28 * \\ Benzo(a)pyren & 5 & 0.69 ** & 0.50 ** & 0.63 ** & 0.73 ** & 0.63 ** & 0.76 ** & 0.26 \\ Indeno(1,2,3-cd)pyren & 6 & 0.73 ** & 0.51 ** & 0.64 ** & 0.71 ** & 0.61 ** & 0.72 ** & 0.30 * \\ Dibenz(a,h)anthracen & 6 & 0.73 ** & 0.52 ** & 0.64 ** & 0.72 ** & 0.64 ** & 0.76 ** & 0.30 * \\ Benzo(g,h,i)perylen & 6 & 0.74 ** & 0.51 ** & 0.65 ** & 0.73 ** & 0.64 ** & 0.77 ** & 0.29 * \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Correlation coefficients between PAH16 indicators and inorganic pollutants in the humus layer; significance: * \(p\) < 0.05, ** \(p\) < 0.01. \begin{table}
\begin{tabular}{l c c c c c c c} \hline \hline
**Predrin** & **As** & **Cd** & **Cr** & **Cu** & **Ni** & **Pb** & **Zn** \\ \hline
**NFSI-1** & & 0.11 ** & 0.12 & 0.13 & \(-\)0.01 & 0.01 & 0.15 \\
**NFSI-2** & 0.02 & \(-\)0.06 & 0.14 & 0.15 & 0.07 & 0.15 & \(-\)0.07 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Correlation coefficients between Dieldrin concentration and the As, Cd, Cr, Cu, Ni, Pb and Zn concentrations in the humus layers of Brandenburg NFSI sites differentiated for data from NFSI-1 (n = 36) and NFSI-2 (n = 50). below those determined for PAHs (Table 2) and, like these--with the exception of the element Zn--are all highly significant. With a coefficient of determination of R\({}^{2}\) = 0.63, HCB can be estimated from the As and Cr contents in the humus layer. The corresponding regression equation is:  
\[HCB[ng/g]=0.541*As[mg/kg]+0.559*Cr[mg/kg]+0.471 \tag{4}\]  
\(\alpha\)-, \(\beta\)- and \(\gamma\)-HCH and their sum value are significantly higher at the Brandenburg NFSI plots compared to the Germany-wide NFSI sample [35].