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CHAPTER 6.7, UNDERGROUND STORAGE OF HAZARDOUS SUBSTANCES underground storage tank installed after July 1, 1987, shall be equipped with secondary containment which complies with paragraphs (1) to (6), inclusive. (b) The underground tank system shall be designed and constructed with a monitoring system capable of detecting the entry of the hazardous substance stored in the primary containment into the secondary containment. (c) The underground storage tank shall be provided with equipment to prevent spills and overflows from the primary tank. (d) If different substances are stored in the same tank and in combination may cause a fire or explosion, or the production of flammable, toxic, or poisonous gas, or the deterioration of a primary or secondary container, those substances shall be separated in both the primary and secondary containment so as to avoid potential intermixing. (e) If water could enter into the secondary containment b Precipitation the facility shall contain a means of monitoring for water n rus onand forrremlovin'g the water by the owner or operator. This removal system shall also prevent uncontrolled removal of this water and provide for a means of analyzing the removed water for hazardous substance contamination and a means of disposing of the water, if so contaminated, at an authorized disposal facility. (f) Underground pressurized piping that conveys a hazardous substance shall be equipped with an automatic line leak detector and shall be tightness tested annually. (g) Before the underground storage tank is covered, enclosed, or placed in use, the standard installation testing for requirements for underground storage systems specified in Section 2-7 of the Flammable and Combustible Liquids Code, adopted by the National Fire Protection Association, (NFPA 30) as amended and published in the respective edition of the Uniform Fire Code, shall be followed. i (h) Before the underground storage tank is placed in service, the underground tank yyy� system shall be tested in operating condition using a tank integrity test. (i) If the underground storage tank is designed to maintain a water level in the secondary containment, the tank shall be equipped with a safe method of removing any excess water to a holding facility and the owner or operator shall inspect the holding facility monthly for the presence of excess water overflow. If excess water is present in the holding facility, the permitholder shall provide a means to analyze the water for hazardous substance contamination and a means to dispose of the water, if so contaminated, at an authorized disposal facility. (Formerly§ 25284, added by Stats.1983, C. 1046, § 3. Renumbered§ 25291 and amended by Stats. 1984, c. 1584, § 2; Stats.1985, c. 1228. § 3, eff. Se Stats. 1985, c. 1535 3 § , eff Oct. 2, 1985; Stats.1986, C. 248, § 151; Stats.�986, 5 c. 1025, § 2; Stats.1987, c. 1372, § 6; Stats.1989, c. 1397, § 11. Amended by Stats. 1996, c. 611 (S.B. 562), § 2.5.) h SWRC8 -- 25 it