HRP Associates, Inc - Remediation / Corrective Action Projects

Remediation / Corrective Action Projects

Fort Trumbull Area, New London, CT

Since 1998, HRP Associates, Inc. has provided the New London Development Corporation with environmental site assessment investigations and remedial action plan development and oversight in the Fort Trumbull area of New London, Connecticut. The 90-acre section of New London is under redevelopment following an approved Municipal Development Plan in which HRP is an integral part.

The commercial, industrial, former military, and residential properties under consideration for redevelopment have been evaluated for known and potential sources of contamination as a result of current or historical activities.

Initially, HRP performed Phase I Environmental Site Assessments (ESAs) of some 80 different parcels to identify whether significant environmental concerns are present. HRP performed pre- and post-demolition inspections of each property as access was available. Based upon the site inspections and Phase I assessment tasks, Phase II and III subsurface investigations were performed on properties where there were known or suspected contaminant sources. HRP has completed soil gas surveys, geophysical surveys, test borings and ground water monitor well installations, and collection and analysis of soil and ground water samples. Comprehensive summary reports (environmental assessment, remedial action plans, remedial action reports) have been completed, and HRP is working closely with the Connecticut Department of Environmental Protection (DEP), the Department of Economic and Community Development (DECD), the New London Development Corporation (NLDC), the City of New London, and the various engineering and construction management contractors involved in the entire redevelopment process.

Remediation has been completed on a number of large aggregated parcels. Funding sources include the DECD and the U.S. EPA through the Brownfields Assessment Demonstration Pilot issued to the City of New London. Currently, several portions of the development area have moved to the construction phase where HRP provides environmental plans and specifications, material management services, and construction oversight.

Former Bethlehem Corp, Easton, PA

HRP is conducting a remedial investigation at a former 100-year old steel foundry slated for demolition and commercial development. The work is being conducted pursuant to Pennsylvania’s Land recycling Program (Act2). The 34-acre site consists of the 29-acre foundry and an adjacent five-acre automobile dealership.

A Phase II ESA identified 19 potential areas of concern including overall site-wide groundwater. The investigation was conducted in a phased manner with each phase of work building upon prior results. A total of 25 bedrock wells and over 200 Geoprobe® soil sampling locations were installed. Additional investigation techniques included the use of hollow stem augers drilling, back hoe test pits, and storm water system dye testing.

Air rotary drilling methods were used to install monitoring wells in the limestone bedrock to a depth of up to 200 feet. In some locations, telescoping casing was used to case-off mud-filled voids. In one location No.2 fuel oil free product was found on the water table surface at a depth of 110 feet. A free product skimming system was designed by HRP to remove the product to the extent practical. Geoprobe® technology was used to quickly assess soil quality beneath the foundry building floors as well as to determine the lateral and vertical extant of foundry sand disposed of on site. An asbestos building material survey was also conducted.

The results of the investigation were used to develop a site conceptual models that depict source areas, migration pathways, exposure points, and potential receptors. The models well be used to support the selection of appropriate clean up standards for soil and groundwater. The data has also be used to develop five DEP remedial work plans designed cleanup identified areas of contamination including the free product, asbestos removal, drum area cleanup, PCB oil removal and foundry sand capping.

Manufacturing Facility, Lincoln, NH

HRP was retained by an international electrical manufacturer to complete an environmental site contamination assessment at a manufacturing facility site in northern New Hampshire. HRP subsequently performed several phases of hydrogeological investigations to define soil and groundwater contamination (both overburden and bedrock aquifers). Subsequently, HRP designed, pilot tested, and installed a plume control and groundwater treatment system. HRP prepared a Site Investigation Report and Remedial Action Plan pursuant to NH DES regulations (ENV-WS 410) and is currently managing groundwater contamination at the site under a Groundwater Management Permit (GMP). HRP has recently performed a pilot test of a Vacuum Enhanced Multi-phase Recovery (VEMR) system to address a second on-site plume of VOC ground water contamination in the overburden and shallow bedrock aquifers.

Other site activities performed include an Environmental Compliance Audit and Stormwater Discharge Evaluation. HRP has investigated and remediated a former on-site hazardous waste landfill and designed, pilot tested and installed two soil venting systems to address volatile organic soil contamination. HRP is presently monitoring all environmental treatment systems and groundwater quality under the GMP and reuse of treated ground water in the plant prior to discharge to the local STP.

For more information, please contact Robert Leach, L.E.P. or Daniel Titus at 1-800-246-9021