Also of note is the comment "...with $33m residual capacity...

Also of note is the comment
"...with $33m residual capacity under its existing finance facilities and access to approximately $100m off balance sheet financing through its relationship with Balbec Capital LP. " 
I interpret the reference to Balbec as meaning that CLH can 'sell' (a bit like factoring) part of their PDLs to Balbec to obtain capital in the short term to fund expansion for the ACM and any other transactions. They have some residual rights to such PDLs and maybe fee income for performing the collection service for Balbec.