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12/07/2001 08:12 6127845236 CHETS SHOES PAGE 88 <br /> SFMD'Fact Sheet TNS-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 plana 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 48,000 gallons aggregate capacity at <br /> any one dispensing site. <br /> 2. ASTs less than or equal to 6,000 gallons shall be located at least 15 feet from property lines that <br /> can be built upon,including opposite sides of a public way. These ASTs shall also be located at <br /> least 5 feet frond,buildings and the near side of a public way(see the table below) <br /> 3. ASTs greater than 6,000 gallons shall be located at least 25 feet from property lines that.can be <br /> built upon, including opposite sides of a public way_ These ASTs shall also be located at least 15 <br /> feet from buildings and the near side of a public way(see the table at the bottom of this page). <br /> 4. ASTs shall have overfill prevention that will provide notification at 85% fill and automatically <br /> stop fuel flow at 90%. <br /> 5. Dispensing devices can be installed on or adjacent to the AST. <br /> 6. Antisiphon devices shall be installed on the external piping when the piping extends below the <br /> liquid 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 Minimum distance from Minimum distance Minimum <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 15 feet 5 feet 3 feet <br /> to 6,000 <br /> Greater than 6,000 25 feet 15 feet 3 feet <br />