{
  "primary": "product pipes and riser",
  "secondary": "connected fiberglass trough to pump-block containment interface",
  "runoff_exclusion": "covering layer across trough section; edges/penetrations need selected detail",
  "support": "smooth flat bedding fully supports trough",
  "historical_material_condition": "fiberglass trough/polypropylene cover; no sheet thickness transferred as universal criterion",
  "required_assessments": [
    "boundary joints/riser continuity",
    "capacity",
    "leak observation/detection",
    "retained-liquid collection/removal destination",
    "material/coating/cathodic-current compatibility"
  ],
  "not_established": [
    "current compliance",
    "leak detection performance",
    "containment capacity"
  ]
}