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Code" shall also be construed as amending the applicable provision of the 2001 or later Edition of the Plumbing Code. The Plumbing Code as amended, together with all other provisions of this article, shall be known as the City of Santa Ana Plumbing Code. SECTION 24: The City Council of the City of Santa Ana hereby finds, determines and declares that the topography of the City of Santa Ana is near sea level. This is problematic for long distance drainage as proper drainage requires a minimum of a one percent (1%) downhill grade. The amendment of section 8-340 provides soil compaction guidelines so that installation of the drain line is well supported and prevents the failure or sagging of the drain lines due to the short range of elevation between the topographical surface of the City and the topographic surface level and location of the sewage treatment plant that the drains must reach. As a result, a certification by a registered soils engineer is necessary because there must be specific guidelines for compaction or there is a potential risk of the system's failure to drain properly. SECTION 25: That section 8-340 of the Santa Aha Municipal Code is hereby amended such that it reads as follows (new language in bold, deleted language in strikeout for tracking purposes only): 8-340 Piping in the ground (California Plumbing Code Section 314.3) 314.3 of the Plumbing Code is amended to read as follows: Piping in the ground shall be laid on a firm bed for its entire length. Building drains, sewers and storm drain piping systems in the ground, and designed and approved at less than one (1) percent grade, shall be laid on a continuous firm bed, certified by a registered soils engineer as having a compaction level of not less than ninety (90) percent density. Where support is otherwise provided, it shall be acceptable to the Administrative Authority. SECTION 26: The City Council of the City of Santa Ana hereby finds, determines and declares that amendment to section 8-341 is necessary to provide proper support for all horizontal piping, because of the significant potential for damage due to seismic activity. Cast iron is deemed unsafe in light of the seismic zone because of its weight and flexibility. Santa Aha is in close proximity to major active fault systems in Southern California. This area has been designated as seismic zone #4, the highest seismic risk zone in a four-tiered hierarchy that rates the potential risk for seismic activity by geographical areas. As a result, a finding has been made that all suspended piping is to be braced to prevent movement or pipe failure. SECTION 27: That section 8-341 of the Santa Ana Municipal Code is hereby amended such that it reads as follows (new language in bold, deleted language in strikeout for tracking purposes only): Sec. 8-341. Horizontal piping (California Plumbing Code Section 314.7). Ordinance No. NS-2522 Page 15 of 47