LaTeX list environment inside tabular environment: extra line up, preventing alignment

I have a LaTeX question that is bugging me. I am trying to get the list environment to display correctly inside a tabular environment. So far I've got everything on my own except one: the top of the list is not the same as the other table elements, it actually looks like it adds one row above the list ... I would like to have these lists at the top. This is what I have, a normal list environment:

  \newenvironment{flushemize}{
    \begin{list}{$\bullet$}
    {\setlength{\itemsep}{1pt}
      \setlength{\parskip}{0pt}
      \setlength{\parsep}{0pt}
      \setlength{\partopsep}{0pt}
      \setlength{\topsep}{0pt}
      \setlength{\leftmargin}{12pt}}}{\end{list}}

      

        
        
        
      

    

Renamed in broken order:

\newcommand{\rr}{\raggedright}

      

        
        
        
      

    

and here is my table:

\begin{table}[H]\caption{Tank comparisons}\label{tab:tanks}
    \centering
    \rowcolors{2}{white}{tableShade}

    \begin{tabular}{p{1in}p{1.5in}p{1.5in}rr}

    \toprule

    {\bf Material} & {\bf Pros} & {\bf Cons} & {\bf Size} & {\bf Cost} \\

    \midrule

    \rr Reinforced concrete &\rr  \begin{flushemize}\item Strong \item Secure \end{flushemize}&\rr  \begin{flushemize}\item Prone to leaks \item Relatively expensive to install \item Heavy \end{flushemize} & 100,000 gal & \$299,400  \\

    \rr Steel & \begin{flushemize}\item Strong \item Secure \end{flushemize} & \begin{flushemize}\item Relatively expensive to install \item Heavy \item Require painting to prevent rusting \end{flushemize} & 100,000 gal & \$130,100  \\

    \rr Polypropylene & \begin{flushemize}\item Easy to install \item Mobile \item Inexpensive \item Prefabricated \end{flushemize} & \begin{flushemize}\item Relatively insecure \item Max size available 10,000 gal \end{flushemize} & 10,000 gal & \$5,000  \\

    \rr Wood & \begin{flushemize}\item Easy to install \item Mobile \item Cheap to install \end{flushemize} & \begin{flushemize}\item Prone to rot \item Must remain full once constructed \end{flushemize} & 100,000 gal &  \$86,300\\

    \bottomrule

    \end{tabular}
\end{table}

      

        
        
        
      

    

Update

Thanks to Little Bobby Tables and Charles Stewart for your answers. I've tried both of your suggestions and unfortunately couldn't get them to work.

In the tweaklist, I tried:

...
\usepackage{tweaklist}  
\renewcommand{\enumhook}{\setlength{\topsep}{0pt}
\setlength{\itemsep}{0pt}}

\begin{document}

\begin{table}[H]
\centering
\begin{tabular}{lp{2in}l}

  blah & \begin{itemize}\item One \item Two\end{itemize} & blah \\

  blah & blah & blah \\

\end{tabular}
\end{table}
...

      

        
        
        
      

    

and for paralysis I tried:

...
\usepackage{paralist}  

\begin{document}

\begin{table}[H]
\centering
\begin{tabular}{lp{2in}l}

  blah & \begin{compactitem}\item One \item Two\end{compactitem} & blah \\

  blah & blah & blah \\

\end{tabular}
\end{table}
...

      

        
        
        
      

    

Let me know if I missed something, I tried to use the documentation supplied with the packages as best I could.