42 Engineering services, namely, analysis of environmental control systems to determine the minimum attainable energy consumption levels of the systems; engineering in the field of optimal facility performance to aid in the reduction of building and ownership costs; engineering design services; monitoring electric power consumption and providing analysis; testing, analysis and evaluation of the goods and services of others for the purpose of certification for government and private energy certification programs; energy modeling, namely, engineering in the field of energy; mechanical electrical and plumbing surveys, namely, conducting engineering surveys; designing, installing and supporting computerized maintenance and service request systems; designing, installing and supporting facility management software applications; lighting services, namely, design of energy-efficient lighting systems; power technology services, namely, providing engineering services for the development of projects for onsite power plants and distributed resources; conducting preventative maintenance engineering surveys