Dynasonics Acoustics, the division of PCI Industries makes attenuators, duct silencers, casings, sound absorption panels, and louvers designed to eliminate noise in heating, ventilation, and air conditioning systems and other machinery. Dynasonics provides sound products and services to commercial and industrial customers, as well as for performance venues, throughout the world. Its products are sold through a network of sales representatives throughout the US and overseas. Dynasonics has been in operation for more than 30 years.

Atlas Industrial Holdings provides such specialty contracting services as machinery and equipment rigging and steel fabricating, as well as piping, transportation, and electrical services. It also offers plant relocation and maintenance services. The company, which serves clients throughout the US, Mexico, and Canada, has performed such projects as rigging work for a Valero oil refinery and an electrical furnace upgrade for Owens Corning. Clients, which are mostly in the automotive, cement, power, and food and beverage industries, have included Anheuser-Busch, Holcim, and Honda of America.

Professional Service Industries, Inc., the company, which is known as PSI, provides testing for lead-based paint and asbestos, among other services. One of the largest engineering and environmental consulting firms in North America, PSI also is one of the leading independent testing organizations. Its services include geotechnical engineering, soil and materials testing, and facilities and roof consulting. The company provides its testing and consulting services to companies involved in site selection, design, construction, and property management. Investment firm Olympus Partners owns a controlling stake in PSI.

Nadel Architects has plans for the US (and Asia, too). The company, one of the largest architect firms in the US, offers architectural design, planning, and interior design services throughout the US and in Asia. Nadel Architects provides services for commercial, public-sector, residential, and institutional projects. With the burgeoning economy in China acting as a catalyst, Nadel Architects has completed projects in that country such as the Beijing Theater and Retail Complex and Dalian's Bank of China tower.. The company operates from offices in Costa Mesa, Los Angeles, Ontario, Sacramento, and San Diego, California, and in Las Vegas and Phoenix. Chairman Herb Nadel founded the company in 1973.

Imperial Petroleum Recovery Corporation engages in the development and marketing of proprietary oil sludge remediation process and microwave separation technology (MST) equipment that use high energy microwaves to separate water, oil, and solids. The company offers MST to the oil field industry and develops the use of MST in the marine industry and in the production of biodiesel. MST technology uses radio frequency to separate water and oil emulsions. Imperial Petroleum offers four MST systems to be used in the oil and gas industry, including MST-1000, MST-2000, MST-4000, and MST-150. The company was incorporated in 1982 and is headquartered in Houston, Texas.

U.S. Ecology, Inc., through its subsidiaries, provides radioactive, hazardous, polychlorinated biphenyls, and non-hazardous industrial waste management and recycling services in the United States. The company accepts hazardous, polychlorinated biphenyls, industrial and low-level radioactive waste, naturally occurring and accelerator produced radioactive materials, and low-activity radioactive materials, as well as provides waste treatment and disposal facility services. It offers its services to commercial and government entities, such as refineries and chemical production facilities, electric utilities, manufacturers, steel mills, and medical and academic institutions. The company was formerly known as American Ecology Corporation and changed its name to U.S. Ecology, Inc. in February 2010. U.S. Ecology, Inc. was founded in 1952 and is headquartered in Boise, Idaho.

Hanson Pipe & Precast is a division of Hanson Building Products North America, which is part of HeidelbergCement. Not to be confused with the kind smoked by Sherlock Holmes, Hanson Pipe & Precast makes pipes of the concrete variety. The company is the top manufacturer of concrete pipes and structural precast products in North America, with more than 150 plants in the US and Canada. Products include drainage structures, bridge arches, protective linings, ceilings and foundations, road noise barriers, and precast manholes, all of which are routinely used in the construction industry. Clients include state transportation departments, public authorities, the US Army Corps of Engineers, and private entities.

Alumasc Group began operations in 1984. The company sells to customers in the automotive, brewery, and residential and non-residential construction industries. Alumasc Group has gone metallic green. The company still provides die casting and machining services, but most of its business comes from making environmentally sustainable products. Alumasc operates through two main divisions: Building Products (solar shades, green roofs, scaffolding, and homebuilding products) and Engineering Products (precision aluminum components, die casting, and drink dispensing systems). It operates from 12 plants located throughout the UK.

Hathaway Dinwiddie Construction gilds the Golden State. The California general contractor, designer, and project manager specializes in constructing microelectronic, semiconductor, and biopharmaceutical facilities. Hathaway Dinwiddie also has experience building office buildings, entertainment centers, hotels, retail stores, and schools. Other specialties include interior improvements and seismic retrofits for the state's earthquake-prone market. The company has worked on projects for clients such as The Irvine Company, Stanford University, and Disney. Executive management owns Hathaway Dinwiddie, which has offices in San Francisco, Santa Clara, and Los Angeles.

Wates Group is a family-owned construction services company, whose values, long term vision and financial independence have enabled us to thrive throughout the economic ups and downs of more than a century. they distinctive culture celebrates people, partnership and sustainability. We are always exploring new ways for the construction industry to work together on strategic issues such as reducing waste and boosting skills. Uncompromising focus on customers and total commitment to safe delivery are the hallmarks of our business.

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