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Oct '09 03 09: 13a Cit�IMET 993707 �, 2 /r- 30-24 FLAMMABLE AND COMBUSTIBLE UQ,UIDS CODE distance from any part of a tank storing Class 11 or class III Eiq- 2.3.3.4.5 Filling and emptying and vapor recovery connec- uids to the nearest wall of any basement,pit,or property line tions for Class 1, Class II, or Class IIIA liquids that are con- shall be not less than I ft(0.3 m). netted and disconnected shall be located outside of buildings 2.3.3.2 Burial Depth and Cover. at a location free from any source of ignition and not less than 5 ft (1.5 m) away from any building opening.Such connec- $.3,3.2.11P All underground tanks shall be installed in accor- tions shall be closed and liquidtight when not in use and shall dance with the manufacturer's instructions and shall be set on be properly identified. firm foundations and surrounded with at least 6 in. (150 mm) 2.3.3.4.6 Tank openings provided for purposes of vapor of noncorrosive inert material such as dean sand or gravel well recovery shall be protected against possible vapor release by tamped in place-The tank shall be placed in the hole with care, means of aspring-loaded check valve or dry-break connection, 2.3.3.2.2 Underground tanks shall be covered with not less or other approved device, unless the opening is pipe con- than 2 ft(0.6 m)of earth,or with not less than 1 ft(0.3 m) of netted to a mapor processing system. Openings designed for earth on top of which shall be placed a slab of reinforced con- combined fill and vapor recovery shall also be protected trete not less than 4 in. (100 mm) thick.Where they are, or against vapor release unless connection of the liquid delivery are likely to be,subjected to traffic, they shall be protected line to the fill pipe simultaneously connects the vapor recovery against damage from vehicles passing over them by at least line.All connections shall be vaportight. 3 ft(0.9 m)of earth cover,or 18 in. (450 mm)of well-tamped 2,3.3.55 Requirements for Underground Tanks Located is Ar- earth plus either 6 in, (150 mm) of reinforced concrete or eas Subject to Flooding. 8 in.(200 mm)of asphaltic concrete.When asphaltic or rein- forced concrete paving is used as part of the protection, it 2.3.3.5.1 At locations where an ample and dependable water shall extend at least I ft (0.3 m)horizontally beyond the out- supply is available,underground tanks containing flammable line of the tank in all directions. or combusrible liquids,so placed that more than 70 percent of their storage capacity will be submerged at the maximum 2.3.3.2.3 Maximum depth of cover shall be specified by the flood stage,shall be so anchored,weighted,or secured as to tank manufacturer and marked on the tank. prevent movement when filled or loaded with water and sub- When the depth of cover is greater than the diameter of merged by floodwater to the established flood stage. Tank the tank or if the pressure at the bottom of the tank can vents or other openings that are not liquidtight shall be exceed 10 psig (64 kPa), the manufacturer of the tank shall extended above maximum flood stage water level. be consulted to determine if reinforcement of the tank is required.The specific gravity of the liquid to be stored shall 2.3.8.5.2 At locations where an ample and dependable water be a design factor. supply is not availab)c or where filling of underground tanks with water is impractical because of the contents,each tank shall 2.3.3.3 Vent Piping for Underground Tanks. Vent pipes from be safeguarded against movement when empty and submerged underground tanks shall be installed in accordance with by high groundwater or floodwater by anchoring or by securing Chapter 3. by other means. Each such rank shall he so constructed and 2.3.3.4 Tank Openings Other than Vents for Underground installed that it will safely resist external pressures if submerged. Tom• 2.3.4 Storage Tank Buildings. 2.3.3.4.1 Connections for all tank openings shall be liquidtight. 2.3.4.10 Scope. Subsection 2.3.4 shall apply to installations of 2.3.3.4.2 Openings for manual gauging, if independent of tanks storing Class 1,Class II,and Class IIIA liquids in storage the fill pipe,shall be provided with a liquidtight cap or cover. tank buildings.This subsection shall not specifically apply to Covers shall be kept closedwhen not gauging.If inside a build- such tanks in process areas. (Ser Chapter 5.) Tanks storing ing,each such opening shall be protected against liquid over- Class IIII3 liquids shall not be required to comply with the flow and possible vapor release by means of a spring-loaded provisions of this subsection.A tank installation that has a check valve or other approved device. canopy or roof that does not limit rhe dissipation of heat or dispersion of flammable vapors and does not restrict fire- 2-3.9.4.3 Fill and discharge lines shall enter tanks only fighting access and control shat! be treated as an outside through the top. Fill lines shall be sloped toward the tank. aboveground tank.(See 1.6.8.2.) Underground tanks for Class I liquids having a capacity of Exception: Tanks that meet the mquirementr of Section 5.5. more than 1000 gal (085 L)shall be equipped with a tigh t fill 23.4 2 Location. Tanks and an associated equipment within device for connecting the fill hose to the tank. Y the storage tank building shall be so located thatafire in the area 2.3.3.4.4 Fill pipes that enter the top of a tank shall terminate shall not constitute an exposure hazard to adjoining buildings or within 6 in. (150 mm) of the bottom of the tank-Fill pipes tanks fora period of time consistent with the response and sup- shalI be installed or arranged so that vibration is minimized. pression capabilities of the fire-fighting operations available to FxceUtion No. 1: Filt pipes in taroks whore vapor space under the ex- the location. Compliance with 2.3,4.2.1 through 2.3.4-2.5 shaft Erected range of normal operating conditions is not in the Jlammabk be deemed as meeting the requirements of 2.3.4.2. range or is merted need not mut this requirement. 23.4.2.1 The minimum distance from exposed property lines Esception No.2: F31t pipes in tanks hmutling liquids with minimaz and buildings for tank installations within structures having potential for accumulation of static electricity need not mut this r" walls with a fire resistance rating of less than 2 hours shall be quirement provided that the fill line is designed and the system operat- in accordance with Table 2.3.4.2.1.Capacity of any individual ed to avoid mist generation and an adequate letW of rmidetu time is tank shall not exceed 100,000 gal (380,000 L) without the provided downstream of fl&m or.serrtns such thaI W charge generamd approval of the authority having jurisdiction. is dissipated.(See A.2.3.2.5.4.) Exception: As modified by 23.4.2.2. 2000 Ed'd w