Date: 2017 – 2021
Location: Location not provided for purposes of confidentiality.
Groundwater Monitoring: Leaaf Environmental, LLC (Leaaf) conducted annual groundwater monitoring at an abandoned antifreeze recycling facility, revealing the need to prepare a Work Plan, a Quality Assurance/Quality Control (QA/QC) Plan, and a Technical Sampling and Analysis Plan (SAP) to conduct an additional site investigation at the property. Constituents of Concern (COCs) at the facility include chlorinated solvents from antifreeze processing, and petroleum hydrocarbons from fuel/waste oil storage.
Leeaf gauged and sampled three monitor wells and prepared a report in accordance with Risk Evaluation/Corrective Action Program (RECAP) comparing the findings to RECAP screening standards. A report including figures depicting potentiometric and areas of concern was submitted to and approved by the Louisiana Department of Environmental Quality (LDEQ).
Based on the groundwater monitoring results and information provided in previous reports, Leaaf prepared a combined Work Plan, QA/QC Plan, and Technical SAP to conduct additional soil and groundwater sampling and analysis. The objective of the additional site investigation was to delineate the soil area of investigation, to delineate the light volatile groundwater plume, and to provide data to determine whether a dense volatile plume was present and/or required further investigation. The plan was approved by LDEQ and included the installation of up to eight borings to a maximum depth of 65 feet. Three of the borings were converted to permanent monitor wells, and up to 4 were converted to temporary wells. Soil and groundwater were sampled for volatile and semi volatile organic compounds, metals, glycols, polychlorinated biphenyls (PCBs), pesticides, and hydrocarbon fractions. The results were evaluated in accordance with RECAP guidance and reported to LDEQ.
The combined plan included the required QA/QC elements outlined in EPA Requirements for Quality Assurance Project Plans (QA/R-5).