California's Forgotten Past · section 5 of 18
The map: where the question lives
Nineteen former ranch systems, graded by the probability that arsenical dipping occurred, documented, highly probable, likely, plausible, with today's community named on each. This is a prioritisation of an unanswered question, not a contamination map: no vat is located on it and no soil result exists behind it. The areas that follow are ordered by priority, beginning with Ladera Ranch, then the one documented ranch at Bell Canyon / Coto de Caza.
research/statewide/CA_dipping_probability_map.jpg
The same zones over real imagery, the communities that sit on the old ranges today:
research/statewide/CA_dipping_satellite_overview.jpg
Independent research & data-organization project. No medical advice; no causation established; geographic and temporal overlap does not establish exposure or causation. No CA dip-site soil has been tested. Source grades A1-D per chapter 73; registry: research/source_registry/sources.csv.