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Kinder Morgan  (17) Mesa Energy Systems, Inc.  (17) Rabalais Constructors, LLC  (12) EMCOR Facilities Services, Inc.  (12) CoolSys  (10) Aircond Corporation  (9) DeBra-Kuempel Inc.  (4) Scalise Industries Corporation  (4) EMCOR Services New York/New Jersey, Inc.  (3) Calibrated Controls  (3) Control Solutions Group, Inc.  (2) The Betlem Service Corporation  (2) Hugh Chatham Memorial Hospital  (2) CCI Mechanical, Inc.  (1) EMCOR Services Automated Controls  (1) Dallas Mechanical Group LLC  (1) Mechanical Services of Central Florida, Inc.  (1) InSite Realty Partners  (1) Bahnson Inc.  (1) Tucker Mechanical  (1)