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Oct '09 03 09: 19a ARNET 99310087 . I 7902.5.11.6-2 P 7902.6.5.3 2001 CALIPOFINIA FIRE CODE located not less than 10 feet (3048 mm) or more than 50 fe (15 240 mm)from any Class I or H liquid storage et 79(126 Underground Tank Storage.area located out- side of a liquid storage room. 7902-Cl General, Underground storage of flammablcordance with Se and One or more portable fire extinguishers having a rating of not combustible liquids in tanks shall be in ac less than 20-B shall be located outside of,but not more than 10 feet 7902.l and 7902.6.For storage of flammable and combustibleect qs (3048 mm)from,the door o aids in below-grade vaults,see Appendix NO TAG. Opening into a liquid storage room. 7902.5,11,6 Basement storage. Class I liquids shall not be 19102 Productsontcontaii g mixtures of a nonpctt contain rulcurn nature, Undergroundtanks shall not contain petro- stored in basements. such as ethanol or methanol blends,without evidence of compati- 7942.5.1.1.7 Explosion control.See Section 7902.1.S, bility, 7902-5.11 Liquid storage wanebouses. 790x•6.3 Location. Flammable and combustible liquid storage tanks located underground,either outside or under buildings,shall 7902.5.12.1 GeneraL Buildings used for storage of flammable be in accordance with the following; or combustible liquids in quantities exceeding those set forth in Section 79025.7 for control areas and Section 7902.5.I1.2 for liq- 1 shall. Tanks to existing rts sch that lithe ads cd with arried b the latter Cann tobe uid storage rooms shall comply with Section 7902512 and shall and suPp o transmitted to the tank, y be constructed and separated as required by the Building Code. 2. The distance from any pats of a tank storing liquids to the 7902.5.12.2 Quantities and storage arrangement. nearest wall of a basement,pit.cellar or property line shall not be less than 3 feet(914.4 mm),and 7902'5'12'2`1 General. The IOW quantities of liquids in a liquid 3. A minimum distance of 1 foot(304.8 nun), shell to shell, storage warehouse are not limited. The arrangement of storage shall be maintained between underground tanks, shall be in accordance with Table 7902.5-D or 7902.5-E. 7902,S.lZ.x 2 7902'6'4 Depth and cove. Excavation for underground storage Mixed storage, Mixed storage shall be in actor- tanks shall be made with due cane to avoid undermining of founda- dance with Section 7902.5.11.2.2. tions of existing structures.Underground tanks shall be set on firm 79025,I2.2 3 5e foundations and surrounded with at least 6 inches(152.4 mm)of Peon and aisles. Separation and aisles noncorrosive inert material such as clean sand or gravel well shall be in accordance with Section 7902.5.11.2.3. pe p accordance with the manufacturer's installa- tam din Iaec or in 790x 5.12.2.4 Stabilizing and su tion instructions.Tanks shall be covered with a minimum of 2 feet Ports shall be in accordance with supports. Stabilizing and sup (609.5 ram)of earth or shall be covered by not less than I foot 4. (3014.8 mm)of earth,on top of which shall be placed a slab of mn- 7902.5.12.3 Spill Control and secondary containment. Liquid forced concrete not less than 4 inches(101.6 mm)thick. storage warehouses shall be provided with spill control and secon- When dary containment as set forth in Section 7901.8. traff-uc,they shall be protected against und tanks ' are likely to be,subjected to pass- ing aver them by at least 3 feet 14.4 Min)amage f o e�alor 7902.•5.12.4 Ventilation. Liquid storage warehouses shall be 18 inches(457.2 mm)of well.tamped earth plus 6 inches(152.4 ventilated in accordance with Section 8003,1.4, mm)of reinforced concrete,or 8 inches(203.2 tam)of asphaltic 7902.5.12.5 Fire pmtection. concrete.When asphaltic or reinforced concrete paving is used as part of the protection,it shall extend at least I foot(304.8 mm)hor- 7902.5.125,1 Fire-extinguishing systems, liquid storage 1zontally beyond the outline of the tank in 0 directions. warehouses shall be protected by automatic sprinkler systems For tanks built in accordance with Section 7902 I 8,the burial installed in accordance with the Fire Code (see Section 9002, depth and the height of the vent line shall be such that the static Standard 10-3) and Table 7902.5-F, 7902.5-G, 7902.5-H, head imposed at the bottom of the tank will not exceed 10 psig 7902.5-I or 7902.5-J. In-rack sprinklers shall also comply with (68.9 kPa)if the fill or vent pipe is filled with liquid. UFC Standard 81-2. U the depth of cover exceeds 7 feet (2133.6 mm) or the Automatic foam-water systems and automatic aqueous film manufacturer's specifications,reinforcements shall be provided forming foam-water sprinkler systems may only be used when ap- in accordance with the tank manufacturer's recommendations. proved. Nonmetallic underground tanks shall be installed in accordance Protection criteria developed from fire modeling or full-scale with the manufacturer's instructions.The minimum depth of cov- fire testing conducted at a nationally recognized fire testing labu- er shall be as specified above in Section 7902.6.4. ratory is allowed in lieu of the protection as shown in Tables 7902,65 Overfill protection. 79025-13 through 7902.5-J when approved. ' For guidelines in the evaluation of alternate materials and fire- 79f12.65.1 General. Fill pipes shall be equipped with a spill fire testing,see Appendix VI-B. container 7902 and an overfill prevention system as specified in Sec- protection designs basal on Lion 7902.6.5. 7902.5.12.5.2 Warehouse hose lines. In liquid storage ware- 7902.65.2 $p,ill containers. A spill container shall be provided houses,either 11/2-inch(38,1 mm)lined or I-inch(25.4 mm)hard for each fill rubber hand hose lines area[ provided pipe to collect liquids spilled by overfilling during reach all liquid storage areas.See also Section ion sufficient number to teak-filling operations. Containers are allowed to be constructed ()01.9. of singlc-wall construction, Containers shall have a capacity of 79025.12.6 Basement storage„ Class I liquidsnot less than 5 gallons(1$.9 L)and shall bee quipped -. stored in basements. valve which drains a spill into the sba.11 not be rim q pP "nom a drain p ary tank. 7902.5.12.7 Explosion control. See Section 7902.1.5. 7902.6..5.3 Overfill prevention sYstem. An 1-1st system shall be provided for each tank.The system shall either'