Prudhomme Truck Tank Service reportedly began operating in the 1940s as a trucking service hauling exploration and production (E&P) waste. Hauled wastes included brine, used drilling fluids, and drilling fluid slush. Up to 35 trucks hauled wastes to offsite disposal facilities, and the trucks were washed onsite in a truck washout pit. An oil water separator recovered oils from the wash water. The recovered oils were reportedly sent offsite for recycling or disposal. Water was discharged to the roadside ditch along Duson Street, on the west side of the property. Waste stored onsite was reportedly tank washout water that was held for treatment. The facility closed in January 1997.
Under contract by the Louisiana Department of Environmental Quality (LDEQ), Leaaf obtained access agreements, conducted a preliminary site visit, reviewed Electronic Database Management System (EDMS) files, and prepared a Site Visit and Letter Report with Recommendations for a former oilfield services facility.
Leaaf prepared a Site Investigation Work Plans, Sampling and Analysis Plans (SAPs), Health and Safety Plans (HASPs), and Quality Assurance / Quality Control (QA/QC) Plans to investigate soil and groundwater at the facility. Additional services consisted of mowing/clearing (site prep), conducting the site investigation, and preparing a Site Investigation Report.
During the initial site investigation, Leaaf advanced soil borings utilizing direct-push technology, installed temporary monitoring wells, collected soil samples for laboratory analysis, and completed waste characterization sampling and disposal. Leaaf completed a Site Investigation / Risk Evaluation/Corrective Action Plan (RECAP) Evaluation Report under Management Option (MO)-1. Elevated barium was detected in surface soils; however, no groundwater was encountered.
Leaaf recently completed an additional site investigation to address data gaps identified during the initial site investigation. Data gaps addressed included delineation of barium in surface soils and sampling and analysis of groundwater. An Additional Site Investigation Report and MO-2 evaluation to update barium standards with new toxicological data was approved documenting the findings of this investigation. The evaluation included a Synthetic Precipitation Leachate Procedure (SPLP) study that was completed to refine the remedial goals for barium at the site. Leaaf recommended development of a Corrective Action Plan to remediate or remove the elevated barium in surface soil.