4. Acquisitions We completed two acquisitions in the third quarter of 2018, three acquisitions in the second quarter of 2018 and two acquisitions in the first quarter of 2018, with a total preliminary purchase price of $95.6 million for the year ended December 31, 2018. One acquisition completed in the third quarter of 2018 reports as a separate operating location and the remainder were tucked-in with existing operations. Our consolidated balance sheet includes preliminary allocations of the purchase price to the assets acquired and liabilities assumed pending the completion of the final valuation of intangible assets and accrued liabilities. Other Acquisitions In the second quarter of 2017, we acquired all of the issued and outstanding stock of BCH Holdings, Inc. and each of its wholly-owned subsidiaries (collectively BCH) for $121.3 million of which $97.0 million was allocated to goodwill and identifiable intangible assets. The total purchase price included $95.4 million in cash, $14.3 million in notes payable to former owners and an $11.6 million contingent earn-out obligation. BCH is an integrated, single-source provider of mechanical service, maintenance and construction with headquarters in Tampa, Florida and operations throughout the southeastern region of the United States, which reports as a separate operating location. In addition to the BCH acquisition, we completed four additional acquisitions in 2017. The total purchase price for these additional acquisitions, including earn-outs, was $9.4 million. We completed two acquisitions in the first quarter of 2016. We acquired the remaining 40% noncontrolling interest in Environmental Air Systems, LLC (EAS) on January 1, 2016 for $46.6 million, including $42.0 million funded on the closing date plus a holdback, an earn-out that will be earned if certain financial targets are met after the acquisition date and a working capital adjustment. Due to our majority ownership and control over EAS on the acquisition date, the difference between the purchase price and the noncontrolling interest liability was recorded in Additional Paid-In Capital in our Balance Sheet. Additionally, in the first quarter of 2016, we acquired 100% of the ShoffnerKalthoff family of companies (collectively, Shoffner), which reports as a separate operating location in the Knoxville, Tennessee area. The acquisition date fair value of consideration transferred for this acquisition was $19.8 million, of which $14.8 million was allocated to goodwill and identifiable intangible assets. The purchase price included $15.5 million funded on the closing date plus a note payable to former owners, an earn-out that we will pay if certain financial targets are met after the acquisition date and a working capital adjustment. In addition to the EAS and Shoffner acquisitions, we completed one additional acquisition in 2016. The total purchase price for this additional acquisition, including earn-outs, was $0.1 million. The results of operations of acquisitions are included in our consolidated financial statements from their respective acquisition dates. The acquisitions completed in the current and prior year were not material, individually or in the aggregate. Additional contingent purchase price (earn-out) has been or will be paid if certain acquisitions achieve predetermined profitability targets. Such earn-outs, when they are not subject to the continued employment of the sellers, are estimated as of the purchase date and included as part of the consideration paid for the acquisition. If we have an earn-out where continued employment is a condition to receive payment, then the earn-out is recorded as compensation expense over the period earned.