Seaworld stock has dropped 50% in 2 years, and in 2 more years they will be gone. The San Diego 'park' is doing the worst of them all. The attempted tank expansion is a last ditch effort by Seaworld to stay alive.
By recommending approval, Coastal Commission staff has completely ignored the site's proven toxicity. It is ranked #33 most toxic site in the nation. It contains gases that are known to migrate along conduits, pool, and explode. 2 large projects adjacent to SWSD have been stopped because of this, and in one instance, a trench worker died and 5 others who jumped in to save him were revived at a local hospital. This is a dangerous place they want to dig into.
It was an above-top-secret military weapons waste dump that Vultee (now Convair) and the other surrounding defense contractors dumped their chem milling waste, mostly chrome sulphuric acid with the dissolved metals, and their spent solvents, mostly carbon tetra chloride, acetone, benzene, MEK and the like, now banned, but quite ok back then, into the barrel trench. This accounts for the CR6 hexavalent chrome, vocs and other toxicants that DTSC (Department of Toxic Substances Control) is so distraught about.