| Buchart Horn (BH) holds a contract with the NJDOT to conduct site remediation of the Mays Landing Maintenance facility in Mays Landing, NJ. Areas of concern being investigated include, former underground storage tanks, dry wells, and groundwater impacted by chlorinated solvents, chlorides, dieldrin, lead, and cadmium. An incident of light mineral oil discovered in a monitoring well was also investigated. BH performed the field work associated with these AOCs according to New Jersey Department of Environmental Protection (NJDEP) Technical Requirements for Site Remediation, N.J.A.C. 7:26E. To investigate the groundwater, 13 monitoring wells were installed at and down gradient of the areas of concern. The monitoring well locations were selected using the Triad Approach.
Prior to implementation of the Site Remediation Reform Act (SRRA) and the Licensed Site Remediation Professional (LSRP) program in 2009, BH submitted multiple Remediation Investigation Reports, Remedial Action Reports, and Remedial Action Progress Reports to the NJDEP, which were subsequently approved by NJDEP. Dry well removal, in October 1996, and excavation of the contaminated soil resulted in an initial decrease of groundwater contaminant concentrations. An injection of oxygen-reducing compounds was performed to further address groundwater contamination at the western dry well AOC. Emergency consultation services were provided when a two-foot thick column of an unknown petroleum product was discovered by BH in one of the monitoring wells during a quarterly sampling event. BH immediately notified NJDOT who called the NJDEP hotline. A sample of the product was collected and submitted to a NJDEP-certified laboratory for a petroleum scan. The analysis identified the product as a light mineral oil. Weekly vacuum events, to remove the light mineral oil, occurred over a month. Sampling confirmed the light mineral oil had been removed. A Site Investigation/ Remedial Investigation Report was prepared and submitted to the NJDEP. The NJDEP requested the interior of the monitoring well be scrubbed with an Alconox/potable water solution. A vacuum truck was used to remove the scrubbing solution and avoid negatively impacting the aquifer with surfactants. BH has also coordinated Immediate Environmental Concern (IEC) procedures with the NJDEP and submitted IEC Engineered System Response Action Reports to the NJDEP when elevated concentrations of contaminants were intermittently detected in potable wells. Annual Remedial Action Progress Reports have been submitted to NJDEP. Besides providing coordination with appropriate regulatory agencies, BH collected, compiled, organized, and summarized quarterly groundwater data collected from 12 monitoring wells and two domestic wells. The analytical data was entered into an Excel spreadsheet for ease of review and to create graphs to evaluate trends in the groundwater quality over time. After implementation of SRRA and the LSRP program, quarterly groundwater monitoring has continued under the oversite of a Licensed Site Remediation Professional. The Remedial Action Regulatory timeframe is May 6, 2021. The quarterly groundwater sampling is being conducted to evaluate monitored natural attenuation (MNA) as the remedial action for implementation at this site. |
Water Resources