Contract – Leaaf Environmental, LLC (Leaaf) is currently under contract with JESCO Environmental & Geotechnical Services, Inc. (JESCO) to assist them in the completion of numerous site investigations as part of the Environmental Protection Agency’s (EPA’s) Region 6 Targeted Brownfields Assessment (TBA) Program. These projects included Phase I and II Environmental Site Assessments (ESAs), Environmental Risk Assessment Investigations, Clean-Up Plans, Asbestos and Lead Inspections, and Regulated Materials Surveys throughout Louisiana, Texas, Arkansas, Oklahoma, and New Mexico.
Location – Nacogdoches, Texas
Phase I ESA – Leaaf conducted a Phase I ESA in accordance with ASTM E1527-13 Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process and All Appropriate Inquiry on an approximately 0.4 acre property in Nacogdoches, Texas. The property was historically operated as a dry cleaner and clothes cleaner from 1963 to 1990. The Texas Commission on Environmental Quality (TCEQ) flagged the property for dry cleaner chemicals that have seeped into the groundwater. Remediation activities have been initiated with the Corrective Action Program, but had not been completed. Historic and current recognized environmental conditions (RECs) were identified as possible environmental risks associated with redevelopment. A Phase I ESA Report was produced outlining the following RECs: previous assessments identifying perchloroethene (a dry cleaning solvent) with concentrations above TCEQ Texas Risk Reduction Program (TRRP) Tier 1 residential protective concentration levels (PCLs) in the groundwater and a low concentration of petroleum constituents of concern (COCs) in the soil. In addition, an auto repair and paint shop was identified on an adjoining property.
Phase II ESA – Following the Phase I ESA, Leaaf prepared a site specific Work Plan, Quality Assurance Project Plan (QAPP), and Health and Safety Plan (HASP) to address the historic use of the site as a dry cleaning facility and the active automotive repair and paint facility on the adjoining property. The Phase II ESA followed the approved Work Plan and consisted of soil and groundwater sampling of seven existing monitoring wells, one temporary monitoring well that was installed, and three soil borings that were advanced to 20 feet below ground surface (bgs) to further investigate the RECs identified during the Phase I ESA. Samples were analyzed for Resource Conservation and Recovery Act (RCRA) metals, volatile organic compounds (VOCs), and hydrocarbon fractions and compared to TRRP PCLs. A report summarizing the activities and findings of the Phase II investigation was produced. Levels of arsenic, chromium, lead, and mercury in the soil and groundwater were detected at concentrations above the TRRP PCLs.
Leaaf completed an updated Phase I ESA following the Phase II ESA. The property is proposed to be redeveloped into a multi-use facility including meeting space, worship center, and potential commercial kitchen.