2019 Spring - UH - None - Ada-obi Onyiah - Week 4 Data for Soil Sample and Researcher Unspecified Location Collection Date of Soil Sample April 22, 2019 Negative Paraoxon, Negative Methyl Parathion Researcher Ada-obi Onyiah Organization University of Houston Lab Section Unspecified Course Term Spring Year of Course 2019 Images for Soil Sample