(Certified Best Practice by BMPCOE)
United Defense, L.P., Ground Systems Division - Santa Clara, CA
Because of concern over remediation cost estimates that were consistently too low, which resulted in cost overruns averaging 40% in the industry, United Defense, L.P. Ground Systems Division (GSD) joined a consortium of approximately 200 companies and government facilities using the statistical model HazRisk.
HazRisk has a database containing information on 237 actual, completed remedial site assessments, cleanups, and underground storage tank projects. This information is provided by the members of the consortium. HazRisk is operated by Independent Project Analysis, Inc. in Reston, Virginia.
By putting minimal amounts of current site data into HazRisk software, users like GSD can obtain accurate and defensible cost estimates based on the database site information already in the system. Since remedial costs generally run very high, corporate executives require accurate cost predictions. HazRisk not only makes cost predictions, but also quantifies the relative reliability of the current site data compared to the database sites, and it quantifies the probabilities for cost over/underruns.
In using HazRisk, GSD has found the statistical model to be most useful in soil cleanup situations and least useful for complex sites with multiple environmental contaminants. This problem is typically solved by breaking the large, complex, multi-containment problem areas into small, less complex areas called operable units. Independent Project Analysis, Inc. has also found that the major cost driver in remediation projects is the volume of the contaminated media the greater the volume, the greater the remediation costs.