The power of diversified services is vividly evident at Hanson & Fitch Inc., a site services company in Danville, Calif., that offers customers a one-stop shop for portable restrooms, temporary fencing and cooking oil collection and rendering.Owners Todd and Kristin Fitch bought the former Dick Hanson Fencing Inc., in 2006, and their diversification strategy has yielded impressive results: 30 to 40 percent annual growth in gross sales revenue; 35 employees, up from five initially; and a stable of equipment including almost three dozen trucks and trailers, more than 1,000 portable restrooms, and 500,000 feet of temporary chain-link fence.The numbers look
