Pulverizing Services Site Residual Soils Contamination/Wetland Restoration | Moorestown, NJ Engineers

Project involved the oversight of the restoration of wetlands and transition areas impacted as part of the remediation of soils contaminated with DDT, DDD, DDE, dieldrin, and aldrin and replacement of contaminated soils with suitable, clean material. Remediation of contaminated soils located within wetlands and wetland transition areas was approved by the New Jersey Department of Environmental Protection (NJDEP) via issuance of the General Freshwater Wetlands Permit No. 4 – Hazardous Site Investigation and Clean-up. The site is located at 332 New Albany Road in Moorestown Township, Burlington County, New Jersey and is comprised of a total of five lots owned by three separate owners, encompassing approximately 25.62 acres. E2PM submitted General Permit No. 4 and the NJDEP approved permitting the temporary disturbance to approximately 5.01 acres of wetlands (forested, scrub-shrub, and emergent) and wetland transition areas (forested and scrub-shrub). As one of several conditions of approval set forth in the approved General Permit, a Mitigation Proposal was required. A Mitigation Proposal was prepared by E2PM and approved by the NJDEP. In summary, a one to one restoration of impacted areas was proposed and accepted by NJDEP. Construction of the restoration area was commenced in October 2006 and completed in May 2007 when all plant materials, deer exclusion fence, and required signage was installed. E2PM oversaw the construction and attended the final inspection with NJDEP representatives.

Subsequent to completion of construction, and as a condition set forth in the General Permit No. 4, forested and scrub-shrub restoration areas were required to be monitored for a period of five years and emergent restoration areas for a period of three years. Monitoring reports were required for submission to the NJDEP no later than December 31 of each monitoring year. 1st year monitoring was completed by others. E2PM completed the required monitoring for the 2nd and 3rd year, with the 4th year proposed to occur in late summer 2011.

During the 2nd year monitoring activities, issues with plant die-off and colonization of certain sections of the restoration area by invasive species (primarily common reed, broad-leaved cattail, and purple loosestrife) were noted. E2PM, in conjunction with approval from Cummings-Riter, identified these issues in the 2nd Annual Monitoring Report and identified measures to address same. NJDEP approved these measures. E2PM prepared a Re-planting Plan to address the die-off issues. During the late fall of 2010, invasive species were twice sprayed. Plants identified on the Re-planting Plan were installed during the spring of 2011. E2PM will continue to conduct the required monitoring activities as required under the conditions set forth in the General Permit No. 4, requesting release of the emergent areas as part of the 4th Annual Monitoring Report from further monitoring requirements, given the effectiveness of the invasive species control.