---
title: "Complimentary Article: Huntley's LNAPL Transmissivity Baildown Test Method Revisited"
description: Explore the impact of a newly revisited LNAPL baildown test method, as analyzed by Roux Technical Directors.
---

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## Huntley's LNAPL Transmissivity Baildown Test Method Revisited

Authored by Roux's Martin J. Hamper, PG and Mir SeyedAbbasi, PhD, PE

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: