(a) Financial Statements of Businesses Acquired.

The audited consolidated financial statements of GPS Inc. and its subsidiaries, as well as the associated report of independent registered public accounting firm related thereto for the fiscal year ended September 30, 2011, are included in this Amendment No. 1 as Exhibit 99.1 and incorporated herein by reference in response to Item 9.01(a). These financial statements are denominated in Canadian Dollars.

The unaudited consolidated financial statements of GPS Inc. and its subsidiaries as of March 31, 2012 and for the six-month periods ended March 31, 2012 and 2011 are included in this Amendment No. 1 as Exhibit 99.2 and incorporated herein by reference in response to Item 9.01(a). These financial statements are denominated in Canadian Dollars.

(b) Pro Forma Financial Information.

The unaudited pro forma condensed combined balance sheet of TETRA as of March 31, 2012 and the unaudited pro forma condensed combined statements of operations for the year ended December 31, 2011 and the three-month period ended March 31, 2012 are included in this Amendment No. 1 as Exhibit 99.3 and incorporated herein by reference in response to Item 9.01(b).

Exhibits.



Exhibit Number                               Description
Exhibit 23.1      Consent of BDO Canada LLP
Exhibit 99.1      Audited Consolidated Financial Statements of Greywolf Production
                  Systems, Inc. for the fiscal year ended September 30, 2011
Exhibit 99.2      Unaudited Consolidated Financial Statements of Greywolf
                  Production Systems, Inc. as of March 31, 2012 and for the
                  six-month periods ended March 31, 2012 and 2011.
Exhibit 99.3      Unaudited pro forma condensed combined balance sheet of TETRA
                  Technologies, Inc. as of March 31, 2012 and the unaudited pro
                  forma condensed combined statements of operations for the year
                  ended December 31, 2011 and the three-month period ended March
                  31, 2012.