Études de cas
J.S. Held rachète Shechter & Everett pour développer sa comptabilité judiciaire dans le domaine du droit de la famille en Floride
En savoir plusA school site undergoing a Comprehensive Modernization Program required evaluation and management of soil possibly impacted by chemicals of potential concern related to historical use of the property. Our experts were engaged to conduct a Preliminary Environmental Assessment-Equivalent (PEA-E), prepare a Removal Action Workplan (RAW), oversee contaminant removal activities, and complete a Removal Action Completion Report (RACR).
The site investigation included soil borings and soil vapor probe installation to identify areas with concentrations exceeding preliminary screening levels. Arsenic and lead were identified as the primary chemicals of concern at multiple locations across the site and the only chemicals present at concentrations above health risk- or health hazard-based screening levels at the site.
Our experts conducted the PEA-E by advancing 119 initial soil borings, 33 step-out borings, and installing 15 soil vapor probes. We completed an additional nine borings to evaluate an expanded project area. Based on the investigation results, the RAW identified arsenic and lead as chemicals of concern, with cleanup values of 12 mg/kg and 80 mg/kg, respectively, and selected excavation with off-site disposal as the most feasible removal approach. Elements of the RAW included development of a sampling and analysis plan, a traffic and waste hauling plan, and a site-specific Health and Safety Plan.
Our team directed the implementation of the removal action, including planning and execution of 17 excavations, waste characterization, confirmation sampling, soil screening using X-ray fluorescence (XRF), and air monitoring. Excavation activities used a combination of mini-excavation and hand-digging methods, with utility clearance performed using geophysical techniques and protective measures implemented around site features designated to remain in place.
Five excavation areas were modified based on confirmation of sampling results, and constraints limited further expansion in certain locations. Post-removal statistical analysis was conducted at the 95 percent upper confidence level of the mean to evaluate residual concentrations.
Air monitoring confirmed dust levels remained below allowable limits. Excavated areas were restored using fill materials. The removal action was completed within the established schedule and budget. Remedial excavation at two locations on-site that could not be completed at the time due to remnant building structures impeding additional excavation was subsequently completed.
> Environmental Risk and Compliance
Notre équipe fournit des conseils d’experts sur la détection et la réduction du risque en matière environnementale et développe des solutions pour garantir un respect des normes EHS et une supervision indépendante.
> Environmental, Health, and Safety
J.S. Held dispense des services de conseil et d'expertise en matière d'environnement, santé et sécurité, portant notamment sur les dommages environnementaux et leur remédiation, le devoir de diligence environnemental, la transition énergétique, la toxicologie et l'épidémiologie, l'hygiène industrielle, la gestion responsable des produits et la garantie des produits, ainsi que la santé et la sécurité des personnes.
