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20.52.030 ing or containing sufficient quantities of toxic or explosive substances to be dangerous to the safety of the general public if released. C. "High-risk building" is any build- ing, other than an essential or hazazd- ous building, having an occupant load of one hundred (100) occupants or more as determined by section 1003.2.2 of the Uniform Building Code, except that ahigh-risk building shall not in- clude the following: 1. Any building having exterior walls braced with masonry cross walls or wood frame cross walls spaced less than forty feet (40') apart in each story. Cross walls shall be full story height with a minimum length of one and one- half (1'/2) times the story height. 2. Any building used for its intended purpose, as determined by the Director, for less than twenty (20) hours per week. D. "Minimum-risk building" is any building, not classified as a high-risk building or an essential or hazazdous building, having an occupant load of twenty (20) occupants or more as deter- mined by section 1003.2.2 of the Uni- form Building Code. E. "Low-risk building" is any build- ing, other than an essential or hazazd- ous building, having an occupant load of less than twenty (20) occupants as determined by section 1003.2.2 of the Uniform Building Code. (Ord. 1778 § 11, 1999; Ord. 1669 § 11, 1995; Ord. 1563 § 1, 1992) 20.52.040 Owner Notification: The Director of Building Inspection shall, within six (6) weeks of the effec- 1. See following page for Tables A and B. tive date hereof, notify the owners of property improved with unreinforced masonry buildings determined to be within the scope of this Chapter that such owners are required to submit engineering reports, building analysis, plans for the repairs and complete any necessary structural repairs within the time limits established by Section 20.52.050 of this Chapter. (Ord. 1563 § 1, 1992) 20.52.050 Mitigation Plan: A. Step 1: The property owner shall submit to the City within one yeaz of the adop- tion of this Chapter a structural engi- neering report. The purpose of this report is to establish, by required tests, the strength of the mortaz material holding the bricks or hollow clay blocks together. Such tests will reveal if the walls have proper attachment to the roof system and, in the case of multi-story buildings, that the floor systems are also properly attached to the wall system. The tests are to be completed by a licensed engineer or azchitect. A property owner with a building which does not have a proper wall-to-roof or wall-to-floor attachment must complete the attachment within two (2) yeazs of the adoption of this Chapter. B. Step 2: 1. If the property owner desires to reinforce the existing building, the property owner is to submit plans to the City's Building and Planning Depazt- ments. The property owner shall com- plete the repairs based on the classifica- tions (Table A)' within the time (Pleasanton April 2000) ']34_2