\begin{table}%t5
\caption{\label{abundances result from PDR model}Resulting abundances with respect to $n_{\rm H_2}$ for the narrow PDR~components of water and ammonia from the clumpy PDR~model.}
%\centering
\small
\begin{tabular}{llll}
\hline
\hline
Species & Comp. &$n_{\rm H_2}$ & Abundance    \\
&	& [\cmcub]	 &        \\
\hline
&&& \\[-8pt]
H$_2$O	& Interclump &	5.0~\x~10$^3$	&8.9~\x~10$^{-10}$	\\   
	& Clump&	1.0~\x~10$^6$&	4.8~\x~10$^{-8}$ \\  
	& Mean 	& 8.5~\x~10$^4$  & 4.6~\x~10$^{-9}$ \\ 
NH$_{3}$	& Interclump &	5.0~\x~10$^3$	&1.1~\x~10$^{-10}$	\\     
	& Clump&	1.0~\x~10$^6$&	4.5~\x~10$^{-8}$ \\  
	& Mean 	&  8.5~\x~10$^4$& 3.7~\x~10$^{-9}$\\  
\hline
\end{tabular}
\end{table}