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SFMD Fact Sheet INS-FACT 1999-11 <br /> November 1,1999 <br /> Page 4 of 4 <br /> Additional requirements for 2-HOUR PROTECTED AST <br /> Fire resistive 2-hour protected above ground storage tanks usually include steel tanks that are double <br /> wall and encased in some form of protective insulation such as reinforced concrete.These tanks are <br /> constructed to be fire resistive and thus have reduced requirements for separation between the tank <br /> and buildings and also between the tank and dispenser. A plain steel tank(either single or double <br /> wall) is not a 2-hour protected tank and must instead be installed following the spacing requirements <br /> for UL 142 tanks found on page 3 of this information sheet. <br /> This page covers the additional requirements for double wall fire resistive <br /> 2-hour protected tanks.The separation distances given here apply only to this <br /> type of tank and do not apply for single or double wall plain steel tanks. <br /> 1. ASTs shall not exceed 12,000 gallons individual capacity or 43,000 gallons aggregate capacity at <br /> any one dispensing site. <br /> :. ASTs less than or equal to 6,000 gallons shall be located at least 1 feet from property nines that <br /> can be built upon, including opnosite sides of a public way. These ASTs shall also be located at <br /> least 5 'eet from buildings and the near side of a public way(see the table below) <br /> ASTs rezte;than 6.000 gallons shall be located at ;east `ee:from propene✓lines that Carl be <br /> built U-con. including opposite sides of a public way. These ASTs shall also be located at least =: <br /> fee:from buildings and the near side of a public way(see the table at the bottom of this nage). <br /> !. ASTs shall have overfill prevention that will provide notification at 3P'o I-- and automatically <br /> slob fuel flow at 90%. <br /> �. Disuensina devices can be installed on or adjacent to the AST. <br /> 6. nd.sluIlon devices shall be installed on the external piping when the piping e:.te nas below :he <br /> licuid level of the AST. <br /> 7. Fill openings shall have a spill container at least 5 gallon capacity. <br /> Minimum separation requirements for protected aboveground tanks <br /> Individual Tank i )Minimum distance from Minimum distance l�linimum <br /> Capacity property line which is or from the nearest side of distance <br /> (gallons) can be built upon, any public way or from between tanks <br /> including the opposite the nearest important <br /> side of a public way building on the same ! <br /> property <br /> Less than or equal' 115 feet 15 feet j feet <br /> to 6,000 <br /> i <br /> Greater than 6,000 25 feet 15 feet 3 feet <br />