The best way to represent this information on a web page is to put it on a table. I would use the <table> tag to create the table element. The <tr> tag for creating a series of row elements, the <td> tag to create cell divisions and the <br> tag for a line break.
I would use 10 rows for different plants and 8 columns for different points in time.
<em>Hope this helps :)</em>
