By Lynda Huckestein, Project Chemist, Kelso, WA
Aquatic Humic Substances (AHS) result from the decomposition of plant and animal residues and are found in soil, sediment, and water. They are widespread in nature and are mostly comprised from naturally occurring dissolved organic matter in water.
The Massachusetts Department of Environmental Protection (MassDEP) recently updated and finalized their Air-Phase Petroleum Hydrocarbons (APH) analytical method. The APH method, which had been in draft format since February 2000, was completed last year by a MassDEP Workgroup and approved after a month long public comment period in December 2008. The committee was comprised of MassDEP personnel, laboratory experts and data users.
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 Vapor Intrusion Investigations: Air Sampling Tips for Meeting Data Quality Objectives
September 26, 2011 |
 Incremental Sampling Methodology
June 22, 2011 |
