Baildown tests are a cost-effective method for estimating transmissivity, with Huntley developing an analytical method in 2000 based on the Bouwer and Rice (1976) rising head slug test. Batu (2012) criticized Huntley's Method 1 for including a density correction factor, while both it and Lundy and Zimmerman's Method share the same foundation.

Research by Roux's Martin Hamper and Dr. SeyedAbbasi identified a mathematical error in Huntley's Method 1, leading to an inflated LNAPL transmissivity value that could be 4 to 10 times higher than accurate. This discrepancy may result in excessive remediation costs. 

This important research was published in March 2026 in the National Ground Water Association's Groundwater Journal. Please complete the form to access the full article: