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SECTION 30: The City Council of the City of Santa Ana hereby finds, determines and declares that adoption of section 8-402 amending California Plumbing Code Table 6-6 is necessary because Santa Ana is located in a desert plain subject to seasonal hot, dry winds. In order to assure an adequate water supply for common domestic water demand, in addition to landscape irrigation needs, it is determined that an increase from a %" diameter pipe supply to an 1" diameter supply and two %" diameter hose bibbs in the front and back yards for irrigation is justified. SECTION 31: That section 8-402 of the Santa Ana Municipal Code is hereby amended such that it reads as follows: Sec. 8-402. Building supply pipe (California Plumbing Code, Table 6-6) Table 6-6 of the Plumbing Code is amended by changing the triple asterisk footnote to read as follows: *** Building Supply- three-quarter (3/4) inch (20 mm) nominal size minimum, - 1" minimum diameter for each single-family residential structure. SECTION 32: The City Council of the City of Santa Ana hereby finds, determines and declares that adoption of section 8-405 amending California Plumbing Code section 718.1 is necessary because of problems which have arisen in excessively flat-graded drain systems. Santa Ana's sewer system in many areas is relatively shallow. This has precluded the design and installation of drainage systems within the code recommended grades. Additionally, many areas of Santa Ana have a high water table which results in an unstable soil condition. Pipe settlement due to uncompacted soil may result in a drainage system which is flat or reverse graded, causing stoppages or complete blockage of the drainage system. SECTION 33: That section 8-405 of the Santa Ana Municipal Code is hereby amended such that it reads as follows: Sec. 8-405. Grade, Support, and Protection of Building Sewers (Section 718.1). Section 718.1 of the California Plumbing Code is amended by adding the following paragraph thereto. Building sewer piping systems designed for grades of less than one (1) percent shall be designed by a registered civil engineer. The engineer shall be responsible for supervising the installation and shall certify in writing that the sewer installation is in compliance with the approved plan, relative to line and grade. SECTION 34: That section 8-556 of the Santa Ana Municipal Code is hereby amended such that it reads as follows: Sec. 8-556. Adoption by reference. There is adopted by the city that certain code known as the California Mechanical Code, 2007 Edition and with appendices A and C and code standards therein Ordinance No. NS-2760 Page 13 of 36