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HomeMy WebLinkAboutCC RES 86-31RESOLUTION NO. 86-31 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF TUSTIN, . ADOPTING GENERAL PLAN AMENDMENT 86-1c, AMENDING THE SEISMIC SAFETY ELEMENT OF THE TUSTIN AREA GENERAL PLAN FOR THE AREA BOUNDED BY THE SANTA ANA FREEWAY (I-5) TO THE SOUTH; EXISTING RESIDENTIAL DEVELOPMENT IN THE CITY OF TUSTIN AND THE UNINCORPORATED COMMUNITIES OF LEMON HEIGHTS AND COWAN HEIGHTS TO THE WEST; UNINCORPORATED LAND TO THE NORTH; AND UNINCORPORATED AREA WITHIN THE SPHERE OF INFLUENCE LINE (MYFORD ROAD) FOR THE CITY OF IRVINE TO THE EAST ENCOMPASSING APPROXIMATELY 1,740 ACRES, COMMONLY KNOWN AS EAST TUSTIN (EXHIBIT "A" ATTACHED HERETO). The City Council of the city of Tustin does hereby resolve as follows' I. The City Council finds and de%ermines as fol lows' A. That Section 65358 of the Government Code of the State of California provides that when it is deemed to be in the public interest, the legislative body may amend a part of the General Plan. B. That a joint application was filed by the city of Tustin and Monica Florian on behalf of the Irvine Company requesting amendment to the Tustin Area General Plan. C. That in accordance with Section 65358 of the Government Code of the State of California, a public hearing before the City Council was duly called, noticed and held for the purposes of amending the Seismic Safety Element of the Tustin Area General Plan concerning the property identified on the attached Exhibit A. Specifically, the following changes are to be made: 1. Chapter 3 of the adopted Seismic Safety Element, as it pertains to the Norwalk and E1 Modena Faults (pages 24 and 25) is hereby amended to read as fol lows' Norwalk and E1 Modena Faults i m The Norwalk Fault is suggested to be a high-angle reserve fault dipping to the north. The fault is approximately 16 miles long, roughly trending northwest, and has been thought to be an accurate trace between Buena Park and the unincorporated area to the northeast of Tustin. There is much speculation regarding the exact location of the Norwalk Fault. Its exact location easterly of the intersection of Commonwealth and Euclid in Fullerton is unknown, although several locations have been postulated. i. Resolution No.86-31 Page two A number of petroleum geologists have expressed doubt as to its location' east of Fullerton since their attempt at drilling ~o fi nd oil. trapped on such a fault has revealed no good evidence. The County has stated ~hat some surface exposures led them to believe that the fault exists and may form a ground water barrier, but again evidence is not good. Field work in a cooperative program between Orange County and the State %o be undertaken during the coming year might shed more definitive information. As noted in Draft Environmental Impact Report 85-2 prepared in conjunction with development of the East Tustin Specific Plan, a portion of the E1 Modena Fault is located wi thin the Peter's Canyon area of the city of Tustin.' {See Exhibit A.) Based upon information presented in DEIR 85-2, the E1 Modena Fault has characteristics that indicate the fault was at one time active. However, based upon preliminary findings of a geotechnical analysis, the fault may not be active at this time {see DEIR 85-2, Appendix C). Should additional study reveal that the E1 Modena Fault is active, development occurring near the fault could be exposed to the potential for surface rupture. Such potential for adverse impact could be reduced by the establishment of a structural setback zone on either side of the mapped trace of the fault. Future development could also be exposed to secondary impacts associated with seismic activity including: expansive soils, weakened rock materials which perform poorly in cut slopes, and perched groundwater which can cause seepage in graded areas adjacent to fau)ts. However, such impacts can be controlled by special foundation design or overexcavation, buttressing or laying back cut slopes, and subdrainage, respectively (DEIR 85-2). That the attached Exhlbtt "A" Sel smi c Safety Element. be included as exhibit in the That a Chapter 8 be added to the Seismic Safety Element establishing policies to be observed in conjunction with development within the East Tustin Specific Plan Area. The additional text shall read as follows- Resolution No.86-31 Page three Chapter 8 Policies To minimize the potential for adverse impacts to development in the East Tustin Specific Plan area resulting from various seismic activities, the following policies are hereby established as a part of the Seismic Safety Element' me Detailed geotechnical and soils engineering reports shall be prepared subsequent to development of preliminary design layouts and final grading plans {e.g., at .the tentative tract map preparation stages). This report will provide further, more detailed measures for treatment of excavational (ripping) difficulties, surficial material removals, cut and fill slopes, expansive soils, faults and liquefaction hazards (influencing the design of roadway stream crossings). Additionally, a slope stability analysis which includes identification of bedding planes and slip planes; location of ancient landslides, and provisions for surface and subsurface drainage control. b Prior to development in the Upper Peter's Canyon area a geotechnical analysis shall be conducted to determine the exact status of the E1 Modena fault. If it is concluded that the fault can be considered active, additional detailed analysis shall be conducted to determine the exact location and extent of the fault. This study will serve to define the location and width of any structural setback zone made necessary by the fault. All' structures to be constructed in the project area shall be designed in accordance with the seismic design provisions of the Uniform Building Codes adopted by the city to maximize safety in the event of an earthquake. That pursuant to the California Environmental Quality Act Final EIR 85-2 has been prepared, certified and considered which adequately addresses the general environmental setting of the proposed project, its significant environmental impacts, and the alternatives and mitigation measures related to each significant environmental effect for the proposed project. The City Council, having final approval authority over this project has ~evlewed and considered the information contained in Final EIR 85-2 prior to approval of this project. · . Resolution No. 86-31 Page four Changes or alterations have been incorporated into the project which mitigate or avoid certain of the significant environmental effects thereof. Pursuant to Sections 15091 and 15092 of the State CEQA Guidelines all significant environmental effects and corresponding mitigation measures together with the requisite findings and facts related thereto have been comprehensively set forth in Attachment A to Resolution 86-28 which is incorporated herein by. this reference. Conditions have been adopted as part of thls project or will be incorporated at the appropriate level of development review which incorporate all of the mitigation measures identified in the EIR. The benefits of the project have been balanced and considered against its possible unavoidable environmental risks and against the project alternatives identified in the final environmental impact report and those benefits are found to be overriding, all as set forth in Attachment A to Resolution 86-28, which is incorporated herein by this reference. E® That General Plan Amendment 86-1c would be in the public interest and not detrimental to the welfare of the public or the surrounding property owners based upon the following' le The proposed amendment provtdes Information not presently contained within the Seismic Safety Element that further identifies and appraises potential seismic hazards in the East Tustin Area as required by Section 65302(f) of the Government Code of the State of California. 2. That poltcies established by the proposed amendment ensure that maximum effort be taken to minimize potential adverse impacts of seismic activity. F. That the Planning Commission approved Resolution No. 2296, recommending to the City Council that GPa 86-1c be adopted. II. The City Council does hereby approve General Plan Amendment No. 86-1c, amending the Seismic Safety Element of the Tustin Area General Plan. PASSED AND ADOPTED at a regular meeting of THe Tustin City Council, held on the 17th day of March, 1986. Attest- MARY-E. ~YNN, City~lerk FRANK GREINKE, Mayor -i STATE OF CALIFORNIA ) COUKTY OF ORANGE ) § CITY OF TUSTIN ) MARY E. WYNN, City Clerk and ex-officio Clerk of the City Council of the City of Tustin, California, does hereby certify that the whole number of the n~mbers of the City Council of the City of Tustin is five; that the above and foregoing Resolution No. 86-31 was duly and regularly introduced, passed and adopted at a regular meeting 'of the City Council held on the 17th day of March, 1986, by the fol 1 owl ng vote' AYES · NOES · ABSENT. COUNC I LPERSONS' COUNCILPERSONS. COUNC ILPERSONS' Edgar, Greinke, Hoesterey, Saltarelli Kennedy None MARY E. WY~, City OCl'e"r'k .... City of Tub-tin, California .i