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20.24.120 (c) In the event of conflicting or overlapping regulatory provisions within the Pleasanton Fire Code and this article, the more stringent re- quirement shall prevail. a. An occupancy separation with a minimum one-hour fire resistive rating, or, b. The exterior wall, roof or foundation of the building. (d) In the event of conflicting or overlapping regulatory provisions with a federal law or state law or regulation, unless the application of this article is expressly preempted by an Act of Congress or enactment of the state legislature, the more strin- gent requirement shall be deemed to apply. SEC 89.102 Definitions (a) General. Unless the context otherwise requires, the words and phrases in this article shall have the meanings set forth in this section and shall govern the construction of this article. For words and phrases not defined in this Chapter, the defini- tions set forth in other articles of the Fire Code shall control. (b) Limited Applications. For the purpose of this article, certain terms and words are defined as follows: (1) "Controls" are a means to regulate materials so as to prevent unauthorized discharges. (2) "Control Area" means a space within a building where regulated materials may be stored, handled, dispensed or used. A control area is an area formed by one or more of the following: c. A maximum of four control areas shall be permitted within a building except build- ings or portions of buildings used for retail sales, which shall have a maximum of two control areas. (3) "Equilibrium Vapor Concentra- tion" ("EVC") means the state of a regulated material at which vapor pressure has stabilized and is no longer rising or falling. EVC Value of a regulated material, determined by multiplying vapor pressure ("VP") by 10, and dividing by atmospheric pressure; as shown in the following equation: mm Hg; atmospheric pres- sure is assumed to be 760 mm at sea level. EVC (ppm) =Vapor Pressure x 106 Atmospheric Pressure 760 mm Hg Note: Vapor pressure for materials with a boiling point equal to or less than 25 degrees C shall be 760 mm Hg; materials with a boiling point greater than 25 degrees C shall use the actual vapor pressure for that material at 25 degrees C. Atmospher- ic pressure is assumed to be 760 mm at sea level. (4) "Facility" means any building, structure, installation, equipment, 710_ 15 (Pleasanton 5-99)