The "Internal Audit Handbook" is a comprehensive, up-to-date presentation of the tasks and challenges facing internal audit. The handbook is based on the audit work of SAPA(R)'s global internal audit department, which obtained the highest score available, "Generally Conforms," during a quality assessment review performed by the Institute of Internal Auditors. It presents the Audit Roadmap, the process model of internal auditing developed at SAPA(R), describing all stages of an audit. The in-depth description provides information on issues such as the identification of audit fields, the annual audit planning, the organization and execution of audits as well as reporting and follow-up. The handbook also discusses management-related subjects, e.g. the organizational structure of an internal audit department. Separate chapters are dedicated to special topics like IT or SOX audits. The book also includes a CD for computer-based learning containing templates to put specific elements of theory into practice. Since the handbook is based on practical experience and gives numerous examples from audit practice it may serve as a guide to internal auditing for persons new in the field as well as provide experienced internal audit professionals with new insights.

Solid waste landfills are an extremely complex and heterogeneous environment. Modeling the biodegradation processes within a landfill must involve an understanding of how environmental factors affect these processes. Arguably, the most important environmental factor influencing biodegradation processes is solid waste moisture content. This thesis effort, which is an extension of a system dynamics model previously presented by Colborn (1997) and amended by Benter (1999), attempts to understand and model the effects of moisture content on waste degradation and landfill gas generation. The new moisture structure that was added to the previous models provides a better representation of the impact of moisture on aerobic and anaerobic hydrolysis and bacterial populations, and ultimately, gas generation. It also gives a clearer picture of how moisture is distributed between the solid waste and the void spaces within a landfill. Leachate and moisture infiltration flows were introduced into the model as a means to replicate the "wet-cell" or bioreactor landfill.