I apologize for not mentioning the particle size plot in the background section in my post. Could you please clarify for me whether I should use the PSD information found in the Background Section versus the information found under the Technical Description section of the Challenge Guidelines. I ask for this clarifiction because the material graphed in the Background Section appears to have more fine grained heavy minerals especially when it is compared to the average particle size range for heavy minerals stated in the first paragraph of the Technical Description. Thanks.
The particle size information contained in the Background section is specifically related to the material that we want to test whereas the information contained in the Technical Description of the Guidelines is more generic. Hope this helps.