Recycling Area - Exterior

We are working on a retail/office CS project (2.0) and are looking at placing the recycling outside adjacent to the dumpster area, as the interior common areas don't accommodate all tenants very well. Is this acceptable? The building falls within the 5001-15,000sf, so the recommended recycling area is 125sf. If we can place it outside, does this 125sf area still apply, or will having the bin area achieve our prerequisite? And finally (yes, this is my first LEED project) do we need bins for all 5 non-hazardous materials, or can any of the materials be collected together? Thanks for any newbie help the community can offer.