Extensive series of storage units often are used to house natural history collections. Typically, these units rest on floor surfaces, or on wooden frames if there is a need for leveling floor irregularities. It is not unusual for organic and inorganic materials to accumulate between and under these storage units, providing refuge and nutrients for insect pests. By positioning storage units above floor surfaces, debris can be removed with periodic house-keeping measures. In turn, the absence of debris accumulation can be more effective in solving pest problems than the use of toxic chemicals. Raising storage cases above floor surfaces can provide other benefits, such as protection from floods.