2 Staged Validation List Using Single Data Sheet

Originally I had a file with multiple tabs to sort data, this was becoming very ineffective so what I have done is modified the original WB posted into the desired new format. The WS PSM-04-03A is a vlookup based report that used to pull data from each tab based upon the WS Name (the code is still their) what I have done is combined the WS and made a column(ColumnD) for what used to be the WS Name. All WS have besides "Home" and "PSM-04-03A" have been combined into 1 WS and the title for the data from the original sheet names was added to columnD of "Recommendations" in the new file. (i.e. I did not add all files just some so you could see what I was getting at).

So using the two WBs as an example the Isomeration Unit/MEK Dewaxing Unit/ROSE Unit tabs have been combined into one tab and a new columnD added to signify what used to be done with the "tab". Now if you look at the validation on WS "PSM-04-03A" on the first WB it utilizes the WS Names to populate a list in cell A4 and cell C4 then populates with all columnA items from that WS. Now that I have combined the data I still need the validations to populate the same. So A4 in the new WB would populate with all non repeats of the unit in ColumnD of the WS "Recommendations" and then cell C4 would populate with the filtered columnA results based upon the columnD choice.

OLD FILE : (PSM-04-03) PHAR Tracking v2.xlsm

NEW FILE : (PSM-04-03) PHAR Tracking Modified.xlsm