It is clear that the sources of lead in the environment have changed over centuries. Mining/smelting were prominent at first, dating back to the Ancient Egyptians—given these operations were local, associated contamination was proximal to the source. Then as civilization entered the Industrial Age in the 19th Century, coal combustion added another source of lead…
By Richard W. Hurst Dept. of Geological Sciences, CSU Los Angeles, CA 90032 And Hurst & Associates, Inc. 9 Faculty Ct. Thousand Oaks, CA 91360 INTRODUCTION The paper by Lima et al. (2005) is noteworthy in that the authors utilize the Anthropogenic Lead ArchaeoStratigraphy (ALAS) Model (Hurst, 2000, 2002, and citations therein), as a reference…
Hurst & Associates, Inc. (HAI) is initiating Blogs that will focus on a variety of environmental forensic issues. Upcoming topics will include: Tracking hydraulic fracturing (“fracking”) fluids in soil and groundwater systems Identifying sources of hydrocarbon releases (leaded/unleaded gasoline, middle distillate fuels (e.g., diesel, heating oil, etc.) Issues with lead paint and discriminating among sources…