Earthcom 70-128
The ECA 70-128 (Earthcom Arch 70 ft span) is a totally self-contained 15 psi elliptical arch condominium disaster shelter designed to protect up to 200 adults for long periods or 400 people for short durations such as during tornadoes. The arches must be assembled on site by local contractors.  The product was specifically designed and developed to protect  people during and after disasters such as tornadoes, hurricanes, earthquakes, storms, forest fires, power failures, nuclear power plant accidents, nuclear/chemical terrorism, and full-scale protracted nuclear, chemical and biological war.  The ECA 32 includes the fiberglass arches, entranceway, emergency escape, life support system, MCAS air filtration, a  2500 gallon fiberglass leaching septic tank, three SCUPP 1000’s with a 1000 gal diesel fuel tank each, three 20 KW prime power slow speed diesel generator, water filtration system, plans, etc. With the EC 70’s "state of the art" technology and long-term self-contained independence, it qualifies as a T.H.E.T.A. (Total Human Environment for Terrestrial Attach) underground shelter.