1 files changed, 17 insertions, 1 deletions
diff --git a/docs/reference/PEC_soil.html b/docs/reference/PEC_soil.html
index 4b1b7b9..a706729 100644
--- a/docs/reference/PEC_soil.html
+++ b/docs/reference/PEC_soil.html
@@ -18,12 +18,22 @@
 <!-- Font Awesome icons -->
 <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-T8Gy5hrqNKT+hzMclPo118YTQO6cYprQmhrYwIiQ/3axmI1hQomh7Ud2hPOy8SP1" crossorigin="anonymous">
 
+<!-- clipboard.js -->
+<script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js" integrity="sha384-cV+rhyOuRHc9Ub/91rihWcGmMmCXDeksTtCihMupQHSsi8GIIRDG0ThDc3HGQFJ3" crossorigin="anonymous"></script>
 
 <!-- pkgdown -->
 <link href="../pkgdown.css" rel="stylesheet">
 <script src="../jquery.sticky-kit.min.js"></script>
 <script src="../pkgdown.js"></script>
+  
+  
+<meta property="og:title" content="Calculate predicted environmental concentrations in soil — PEC_soil" />
 
+<meta property="og:description" content="This is a basic calculation of a contaminant concentration in bulk soil
+based on complete, instantaneous mixing. If an interval is given, an 
+attempt is made at calculating a long term maximum concentration using
+the concepts layed out for example in the PPR panel opinion (EFSA 2012)." />
+<meta name="twitter:card" content="summary" />
 <!-- mathjax -->
 <script src='https://mathjax.rstudio.com/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>
 
@@ -51,6 +61,12 @@
     <div id="navbar" class="navbar-collapse collapse">
       <ul class="nav navbar-nav">
         <li>
+  <a href="../index.html">
+    <span class="fa fa-home fa-lg"></span>
+     
+  </a>
+</li>
+<li>
   <a href="../reference/index.html">Reference</a>
 </li>
       </ul>
@@ -254,7 +270,7 @@ Johannes Ranke
 </div>
 
 <div class="pkgdown">
-  <p>Site built with <a href="http://hadley.github.io/pkgdown/">pkgdown</a>.</p>
+  <p>Site built with <a href="http://pkgdown.r-lib.org/">pkgdown</a>.</p>
 </div>
 
       </footer>