EXHIBIT 10.70

SECOND AMENDMENT AND RATIFICATION
TO PURCHASE AND SALE AGREEMENT

THIS SECOND AMENDMENT AND RATIFICATION TO PURCHASE AND SALE AGREEMENT (this
“Amendment”) is dated as of November 19, 2014, by and among parties listed on
Schedule 1 attached hereto (each a Seller and collectively “Sellers”) and PKY
SUSP, LLC, a Delaware limited liability company (“Purchaser” and each Seller and
Purchaser shall each be a “party” and collectively the “parties”).

RECITALS
A.    Sellers and Purchaser entered into that certain Purchase and Sale
Agreement dated September 19, 2014 and that certain Amendment and Ratification
to Purchase and Sale Agreement dated October 28, 2014 (collectively, the
“Agreement”).
B.    Sellers and Purchaser desire to amend the Agreement as more particularly
set forth in this Amendment.
NOW THEREFORE, for and in consideration of the mutual agreements set forth
herein, and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, the parties amend the Agreement as follows:

1.    Recitals; Defined Terms. The above recitals are true and correct and
incorporated in this Amendment by reference. Capitalized terms not otherwise
defined in this Amendment shall have the meanings given to them in the
Agreement.

2.    Section 10.1.10. Section 10.1.10 of the Agreement shall be deleted in its
entirety and replaced with the following:

“A rent roll for the Properties dated as of November 1, 2014;”
3.    Effectiveness of Amendment. Upon the execution and delivery hereof, the
Agreement shall be deemed to be amended and/or restated as hereinabove set forth
as fully and with the same effect as if the amendments made hereby were
originally set forth in the Agreement, and this Amendment and the Agreement
shall henceforth respectively be read, taken and construed as one and the same
instrument, but such amendments shall not operate so as to render invalid or
improper any action heretofore taken under the Agreement.

4.    Miscellaneous.

(a)    The terms of Sections 15.1 to 15.9 (inclusive), 15.10 (solely as it
relates to changes or modifications) and 15.11 of the Agreement shall apply to
this Amendment mutatis mutandis, as applicable

(b)    Except as modified by this Amendment, all terms and conditions of the
Agreement shall remain unmodified and in full force and effect.

[SIGNATURES TO FOLLOW ON NEXT PAGE]

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The parties hereto have executed this Amendment effective as of the date set
forth above.

PURCHASER:

PKY SUSP, LLC,
a Delaware limited liability company

By:     /s/ David R. O’Reilly            
Name: David R. O'Reilly
Title: Executive Vice President and Chief Financial
Officer

By:     /s/ Jeremy R. Dorsett                
Name: Jeremy R. Dorsett
Title: Executive Vice President and General
Counsel

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SELLERS:

CORPORATE CENTER ONE OWNER LLC
a Delaware limited liability company

By: Corporate Center One Owner Corp.,
a Delaware corporation, its sole member

By:/s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

CORPORATE CENTER TWO OWNER LLC
a Delaware limited liability company

By: Corporate Center Two Owner Corp.,
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

CORPORATE CENTER THREE OWNER LLC
a Delaware limited liability company

By: Corporate Center Three Owner Corp.,
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

DEERFIELD ONE OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

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DEERFIELD TWO OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

GREENS CROSSING II OWNER LP
a Delaware limited partnership

By: Greens Crossing II Owner LLC
a Delaware limited liability company, its general partner

By: Greens Crossing II Owner Corp.,
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name:    Teresa Tsai
Title: President

H. RIVER ONE OWNER LLC
a Delaware limited liability company

By: H. River One Owner Corp.
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

H. RIVER TWO OWNER LLC
a Delaware limited liability company

By: H. River Two Owner Corp.
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name:    Teresa Tsai
Title: President

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H. RIVER THREE OWNER LLC
a Delaware limited liability company

By: H. River Three Owner Corp.
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name:    Teresa Tsai
Title: President

LAKESIDE I OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

LAKESIDE II OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

PARAGON OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

RESOURCE SQUARE ONE OWNER LLC
a Delaware limited liability company

By: Resource Square One Owner Corp.,
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name:    Teresa Tsai
Title: President

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RESOURCE SQUARE TWO OWNER LLC
a Delaware limited liability company

By: Resource Square Two Owner Corp.,
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name:    Teresa Tsai
Title: President

RESOURCE SQUARE THREE OWNER LLC
a Delaware limited liability company

By: Resource Square Three Owner Corp.,
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name:    Teresa Tsai
Title: President

SATELLITE 300 OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

SATELLITE 400 OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

SATELLITE 600 OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

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SATELLITE 800 OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

STONY POINT II OWNER CORP.
a Delaware corporation

By: /s/ Teresa Tsai            
Name: Teresa Tsai
Title: President

TIMBERWAY ONE OWNER LP
a Delaware limited partnership

By: Timberway One Owner LLC
a Delaware limited liability company, its general partner

By: Timberway One Owner Corp.,
a Delaware corporation, its sole member

By: /s/ Teresa Tsai            
Name:    Teresa Tsai
Title: President