376 CONSERVATION OF GEOLOGICAL SPECIMENS Color Image Figure Moa bird on display monitored by telemetry recording the environmental conditions Generally, these sensors were part of a complex control system, and expensive specialist software was needed to view the values They also recorded data in formats that were difficult to export Recording of building management system data can now be easily configured via an internet browser, and, importantly, the data can be retrieved simply and analysed using standard graphing software High-quality building management system sensors have now been developed that allow simple checking and re-certification by conservators using low-cost certified handheld monitors Collection Surveys The collection survey is an essential component of an environmental strategy and is used to determine the physical state and future needs of the collection (Figure 2) For large collections, statistical sampling methods may be needed to reduce the time and money spent on the survey A formal documented inspection or survey will highlight problems in a collection Typically information documented would include damage, surface pollutants, decay, environmental sensitivity, previous conservation treatment, style of storage, and environment Once an overall picture of the collection has been built, a procedure for bringing the collection up to an acceptable standard can be determined Integrated Pest Management Insect pests can cause major problems for a natural history collection Although pests rarely damage geological material, the accompanying documentation may be affected The pesticides that were generally used to stop pest infestations are no longer used Color Image Figure Survey being carried out on sub fossil bone mammal collection because of the risk they pose to health It is advisable to monitor collections through trapping so that potential infestations can be prevented In large organizations the approach to preventing pest damage is known as integrated pest management Mould Preventing contamination by fungal spores within any building is impossible However, mould growth can be prevented by ensuring that the conditions for germination not arise in the stores or display areas Uncontrolled indoor environments may experience extreme seasonal changes, allowing humidity levels to rise to the point where germination of spores occurs If relative humidity is maintained at sufficiently low levels, outbreaks will not occur Levels of between 50% and 60% relative humidity are considered safe and will not