GTA ESI completed an arsenic impacted soil blending project at a confidential former recreational area in New Jersey. Remedial actions were completed at the subject site to address arsenic in near-surface soil above the applicable soil remediation standard. The uppermost 6 to 12 inches of soil that contained arsenic at more elevated concentrations (up to 110 mg/kg) than in other areas was not practical to blend in place and was remediated via soil excavation. Approximately 1,324 tons of soil from the remedial excavations were disposed off-site. No post-excavation soil samples were collected since the remedial excavations were located entirely within areas that were subsequently remediated via soil blending to a deeper depth, and within which post-blending verification sampling was performed to verify completion of the remedial action.
After the shallow remedial excavations were performed, approximately 4 acres were blended in-situ using a rototiller to a depth of approximately 36 inches until cleanup goals were achieved via confirmatory soil samples. The subject site subdivided to construct a new active adult townhome community. The Site Investigation/Remedial Investigation/Remedial Action (SI/RI/RA) Report was prepared under the direction of a New Jersey Licensed Site Remediation Professional (LSRP) in accordance with the Site Remediation Reform Act, New Jersey’s Technical Requirements for Site Remediation (N.J.A.C. 7:26E), and applicable technical guidance documents. Based on the remediation completed at the subject site and the findings of the SI/RI/RA, no further remediation was warranted. Accordingly, issuance of an Unrestricted Use, Response Action Outcome was appropriate for the site.