“The regulators were pretty skeptical at the start, I have to say,” Stephen Eimer, an executive vice president with Related tells Mercury News . After much back and forth, Bay Area regulators have finally accepted Related’s technical document that outlines how the site would be made safe. A foot-thick concrete barrier would be laid over 30 square acres. Housing would be built over shops and restaurants to create more distance between the residents and the waste. Sensors and alarm systems would monitor gasses and a separate system would collect and dispose of it.