ISA-Certified Tree Removal in Allison Park, PA: Why Certification Matters Most homeowners assume that any tree company with a truck and a crew is qualified for the job. Federal safety regulations confirm otherwise. According to OSHA, tree care operations require a qualified arborist to survey every tree removal worksite and identify hazards before a single cut is made. When you hire a tree removal service in Allison Park, PA, the credential that determines whether that federal standard is met is ISA certification. VISIT US: https://goprotree.com/isa-tree-removal-pa