3. Acquisitions In April 2010, we purchased the assets of Res-Kem Corp. and General Water Services Corp., leading regional suppliers of water treatment services and equipment, including deionized water, for an initial installment of $6.0 million. The purchase agreement provides for a second and final installment of $1.0 million, payable six months after the acquisition date, and $0.5 million of additional contingent consideration if specified revenue targets are achieved. On a preliminary basis, the purchase price, including the estimated fair value of the additional contingent consideration, exceeded the fair value of the net tangible assets acquired by $6.3 million, which was allocated to goodwill and other intangible assets. The fair value of the additional contingent consideration was measured using internal cash flow estimates (i.e., Level 3 in the fair value hierarchy established by authoritative guidance issued by the FASB for fair value measurements). In January 2010, we acquired a 50.1% controlling financial interest in Nalco Africa, a new entity formed with Protea Chemicals, one of Africa s largest suppliers of industrial chemicals and services. Protea Chemicals is a division of the Omnia Group, a diversified and specialist chemical services company located in Johannesburg, South Africa. The new entity enables us to re-enter the water and process treatment markets of southern Africa. The business combination did not involve the transfer of consideration, but under the terms of a technical assistance and license agreement executed at the time of the combination, we have licensed to Nalco Africa rights to certain of our patents, know-how and trademarks. On a preliminary basis, the fair value of the business acquired was $20.5 million, which was allocated to goodwill and other intangible assets. The fair value of the business acquired was measured using internal cash flow estimates (i.e., Level 3 in the fair value hierarchy established by authoritative guidance issued by the FASB for fair value measurement