The pictures elicit many more questions than they answer. The arrangement looks 20-40 years old, and likely could not be installed nowadays. Metalclad and metal-enclosed gear would be the norm, with a metering section for each tenant if primary metered.
Working clearances inside the fenced area are probably about half of what’s needed, and the air-switch operator on the left pole may serve one or both transformers. Spooky.
Secondary oil containment is not addressed. It was very common for this type of equipment to contain “fire-resistant/safer” fluid (askarel) instead of mineral oil being so close to a structure.
California does not adopt the National Electric Safety Code, but has their own similar “General Order 95” and G.O.128 for >600-volt systems.
The site would be an insurance-underwriter’s nightmare [or red woody!] ;-)
