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HomeMy WebLinkAboutEnvironmental Hazards Element Update - General Plan Amendmen Council/Agency Meeting Held:�� OD Deferred/Continued to: A proved on 'tio ally A roved ❑D Deni City rk' nature Tj a Council Meeting Date: 9/8/2009 Department ID Number: PL09-18 CITY OF HUNTINGTON BEACH REQUEST FOR CITY COUNCIL ACTION SUBMITTED TO: HONORABLE MAYOR AND CITY COLI#ANIN411'_-.� MEMBERS SUBMITTED BY: FRED A. WILSON, CITY ADMINISTRA PREPARED BY: SCOTT HESS, AICP, DIRECTOR OF P SUBJECT: APPROVE GENERAL PLAN AMENDMENT ND. 08-010 (ENVIRONMENTAL HAZARDS ELEMENT UPDATE) i Statement of Issue,Funding Source,Recommended Action,Alternative Action(s),Analysis,Environmental Status,Attachment(s) Statement of Issue: Transmitted for your consideration is General Plan Amendment 08-010 to amend the Environmental Hazards Element of the General Plan. This is a City-initiated amendment to incorporate language identifying the City's adopted Hazard Mitigation Plan (HMP) and requiring its review, maintenance, and update as necessary. The Planning Commission and staff are recommending approval of General Plan Amendment No. 08-010. Funding Source: Not applicable. Recommended Action: PLANNING COMMISSION AND STAFF RECOMMENDATION: Motion to: "Adopt Resolution No200g-a4ATTACHMENT• NO. 1), a resolution of the City Council of the City of Huntington Beach, approving General Plan Amendment No. 08-010." REQUEST FOR CITY COUNCIL ACTION MEETING DATE: 9/8/2009 DEPARTMENT ID NUMBER: PL09-18 Planning Commission Action on July 28, 2009: THE MOTION MADE BY LIVENGOOD, SECONDED BY SPEAKER, TO APPROVE DRAFT CITY COUNCIL RESOLUTION (ATTACHMENT NO. 1) AND FORWARD TO THE CITY COUNCIL FOR ADOPTION CARRIED BY THE FOLLOWING VOTE: AYES: SPEAKER, MANTINI, FARLEY, SHIER-BURNETT, SCANDURA, LIVENGOOD, DELGLEIZE NOES: NONE ABSENT: NONE ABSTAIN: NONE MOTION PASSED Alternative Action(s): The City Council may make the following alternative motion: "Continue General Plan Amendment No. 08-010 and direct staff accordingly." Analysis: A. PROJECT PROPOSAL: Applicant: City of Huntington Beach Location: Citywide General Plan Amendment No. 08-010 represents a request to incorporate language within the Environmental Hazards Element of the General Plan identifying the City's adopted Hazard Mitigation Plan (HMP) and require its review, maintenance, and update as necessary. B. BACKGROUND The Environmental Hazards Element of the City's General Plan functions as a basis for geologic and seismic safety review, identifying and evaluating associated risks to residents and property within Huntington Beach such as surface geology, liquefaction, tsunami, and flooding. The subject Element outlines issues coupled with such risks and presents the goals, objectives, policies and implementation programs for each hazard. The Federal Disaster Mitigation Act of 2000 requires local governments to adopt comprehensive Hazard Mitigation Plans (HMP) in order to receive additional federal funding following a disaster. The Huntington Beach/Fountain Valley Hazard Mitigation Plan (HMP) was approved in October 2004 by City Council Resolution 2004-85 and had been developed in a collaborative effort between the cities of Huntington Beach and Fountain Valley, -2- 8/12/2009 9:15 AM REQUEST FOR CITY COUNCIL ACTION MEETING DATE: 9/8/2009 DEPARTMENT ID NUMBER: PL09-18 including Fire Departments, various local school districts, public volunteers, private sector representatives,and state and federal agencies. State law currently requires local general plans to discuss safety hazards, and federal law requires local governments to adopt HMPs in order to receive federal financial assistance following natural disasters. Assembly Bill 2140, passed by the State legislature in 2006, limits the amount of post-disaster reimbursement a city may receive from the state to 75% unless local governments incorporate an HMP as a part of an adopted general plan's safety element. The incorporation of the proposed reference language would comply with the requirements of Assembly Bill 2140 and would qualify the City of Huntington Beach to receive up to 100% of post-disaster reimbursement costs for qualified projects. C. STAFF ANALYSIS AND RECOMMENDATION: The proposed modifications to the existing Environmental Hazards Element would enhance the City's post-disaster recovery by increasing our eligibility for reimbursement. It would comply with the requirements of AB 2140, as well as reflect similar General Plan amendments adopted by other California jurisdictions by identifying the adopted HMP. The City's HMP was created in conjunction with adjacent jurisdictions and local school districts to reduce risks and prevent losses from future natural disasters. Additionally, the request would incorporate reference language only, providing the City an opportunity to strengthen hazard mitigation planning and allow future changes to the adopted HMP to occur as necessary without processing a General Plan Amendment. Staff has evaluated the proposed amendments and determined that they are consistent with State law and other elements of the City's General Plan. Staff recommends the City Council approve the modifications. Strategic Plan Goal: Maintain and Enhance Public Safety: The amendments improve existing emergency systems, emergency preparedness, and post-disaster recovery by increasing the amount of possible funding received by the City following a natural disaster emergency, as well as provide a stronger policy guideline for analyzing such risks. Environmental Status: The request is exempt pursuant to Section 15061(b)(3), which states that a project is exempt from CEQA where it can be seen with certainty that there is no possibility that the activity in question may have a significant effect on the environment. -3- 8/12/2009 9:15 AM REQUEST FOR CITY COUNCIL ACTION MEETING DATE: 9/8/2009 DEPARTMENT ID NUMBER: PL09-18 Attachrnent(s): 1. Resolution No2009-49 a resolution of the City Council of the City of Huntington Beach approving General Plan Amendment No. 08- 010 2. Planning Commission Staff Report dated July 28, 2009 3. PowerPoint Presentation -4- 8/13/20091:59 PM ATTACHMENT # 1L] RESOLUTION NO. 2009-49 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF HUNTINGTON BEACH APPROVING GENERAL PLAN AMENDMENT NO. 08-010 WHEREAS, General Plan Amendment No. 08-010 proposes to amend the Environmental Hazards Element by incorporating language referencing the adopted Local Hazards Mitigation Plan pursuant to Exhibit"A" attached hereto; and Pursuant to California Government Code, the Planning Commission of the City of Huntington Beach, after notice duly given, held a public hearing to consider General Plan Amendment No. 08-010 and recommended approval of said entitlement to the City Council; and Pursuant to California Government Code,the City Council of the City of Huntington Beach, after notice duly given, held a public hearing to consider General Plan Amendment No. 08-010; and The City Council finds that said General Plan Amendment No. 08-010 is necessary for the changing needs and orderly development of the community, is necessary to accomplish refinement of the General Plan, and is consistent with other elements of the General Plan. NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Huntington Beach as follows: SECTION 1: The City Council of the City of Huntington Beach hereby adopts said Amendment to the General Plan. SECTION 2: That General Plan Amendment No. 08-010, which amends the General Plan Environmental Hazards Element by incorporating reference language identifying the adopted Local Hazards Mitigation Plan, attached hereto as Exhibit A, is hereby approved. The director of Planning is hereby directed to prepare and file an amended Environmental Hazards Element. A copy of said element, as amended, shall be available for inspection at the Planning Department. 09-2138/35714 1 Resolution No. 2009-49 PASSED AND ADOPTED by the City Council of the City of Huntington Beach at a regular meeting thereof held on the 8th day of September , 2009. yor ATTEST: C;�� o� City Clerk APPROVED AS TO FORM: ---M,"��k)K 4:Ci�tA�ttormey A6,6 C.13010q REVIEW A D APPROVED: INITIATED AND APPROVED: 4444rj�— y dministrator Plann ng D rector 09-2138/35714 2 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT STATUTORY REQUIREMENTS Government Code Section 65302(g)states the following: "The General Plan shall include a safety element for the protection of the community from any unreasonable risks associated with the effects of seismically induced surface rupture, ground . shaking, ground failure; tsunami. seiche, and dam failure; slope stability leading to mudslides and landslides;subsidence and other geologic hazards known to the legislative body;flooding;and wild. land and urban fires." This Element addresses flooding as it pertains to geologic, seismic and soils hazards. This Environmental Hazards Element and the referenced materials together satisfy the geologic and seismic portion of the Section 65302(g)requirement. TECHNICAL SYNOPSIS This Element of the General Plan is the first step in a comprehensive update to be completed for the geologic and seismic safety issues. This Element, when used in conjunction with Appendix A, the 1974 City of Huntington Beach Seismic.Safety Element (the operative document on file with the California Department of Conservation Division of Mines and Geology), and the referenced materials, serves as an adequatebasis for a geologic and seismic safety review. A regional perspective is provided to establish the geologic/seismic context for the City. Figures EH-1 through EH-11 are used to summarize the. types and level of geologic/seismic hazards present in the City. Most of the geologic and seismic hazards that have the potential to impact the City are due to the active Newport-Inglewood fault, the shallow water table, and the relatively loose nature of recent sedimentary deposits. Individually, or in combination, these factors may generate surface fault rupture, severe ground shaking,subsidence,methane,and other relatively minor hazards. Each of these hazards has been identified and described in the following sections: Surface Geology, Liquefaction, Tsunami and Seiche, Subsidence, Methane, Flooding, and Other Minor Geologic and Soil Engineering Hazards. A local Hazards Mitigation Plan has been prepared in conjunction with adjacent jurisdictions and local school districts to mitigate risks from natural disasters and is referenced in this element. A. SURFACE GEOLOGY The City of Huntington Beach lies,on a coastal plain above recently deposited sediment. The sediment is deposited on top.of older bedrock formations buried thousands of feet below the surface. These recent sedimentary deposits originally accumulated in beach, river, bay, and estuary environments at or near sea level. However, due to ongoing seismic uplift and folding, these deposits now form mesas at higher elevations. Subsequent erosion from wave action has produced coastal bluffs exposing.these deposits. THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-I Exhibit"A"- Resolution No:2009-49 � W o m � w [A W SEAL WESTMINSTER BEACH BOLSA o s k" Me a� r FADDEN ® r ° EDINGER :_. � ,. Qya2y HEIL IT WARNER FOUNTAIN VALLEY R405COUNTY OFORANGEQya2 .1 BE '`R6yy (BOLSA CHICA) �• i E US o •` ' m m 3 GARFIELD PACIFIC OCEAN N , YORKTOWN ADAMS INDIANAPOLIS ATIANTA P HAMILTON Qya2 BANNING LEGEND COSTA City Boundary MESA (Qyao Tidal Flat Alluvium (Qya)Younger Alluvial Material (Qoa)Older Alluvial Material SOURCE:Tinsley,J.C.,and others,1985,USGS Professional Paper 1360.Figure.146s SURFACE GEOLOGY CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-2 Exhibit"A" -Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT The sedimentary deposits found in Huntington Beach consist of Quaternary deposits (Pleistocene' and Holocene?) as shown on Figure EH-1. The older Quaternary deposits are exposed on the mesas (Bolsa Chica and Huntington Beach) and in the perimeter bluffs; these are termed older alluvium or terrace materials of the Lakewood and San Pedro Formations.s The mesas (topographically.high areas) are surrounded and separated by younger alluvium which (from north to south) fills the gaps (topographically low areas) at Seal Beach, Bolsa Chica and the Santa Ana River. Younger alluvium is divided into river floodplain deposits (washed in from the northeast as sand, gravel and silt), and tidal flat/lagoonal type deposits lie in the gaps(finer-grained silts and clays). Peat and organic soils are found within the younger alluvium up to about 25 feet (average 5-10 feet thick).a These fine-grained deposits are expansive,5 compressible,and generally have fair to poor geotechnical engineering properties. Floodplain sands and silts are largely unconsolidated and contain the peat layers. On the whole, these deposits are subject to liquefaction (fine sand and peat), settlement, expansion, and have.good to fair engineering properties,except for peat which have poor to very poor engineering properties.6 The oldest terrace deposits consist of sand with interbeds of silty clay and clay, overlain by interlayered sand-gravel and silt-clay beds. All older alluvium is unconsolidated to semi-consolidated, contains "aquifers" in the thicker sand units, has low-moderate expansive soil qualities, has a moderate to high erosion potential,7 and is susceptible to landslide/slope instability/erosion(Figure EH-2) at the edge of the bluffs and in canyons. 1. Near Surface Water Depth The City is underlain by shallow near surface water$which is of interest with regard to liquefaction potential (within depths of 0-50 feet) and as a hazard for construction (within depths of 0-30 feet) (Figure EH-3). This water is found in the alluvial valley and mesa areas as perched water and in shallow aquifers. In the gap areas between the mesas, the City appears to be entirely underlain by water at less than 50 feet deep. These alluvial floodplain(gap)areas have the greatest concentration of shallow water with depths less than 30 feet and most often less than 5 feet deep. The mesa areas(because of their higher elevations)have water depths of 10 feet to greater than 30 feet within the.older alluvium. In the northeastern and eastern City areas water depths are 5-30 feet beneath the floodplain deposits. Narrow strips along the immediate coastline have water depths of less than 10 feet. 1 11,000-1,700,000 years before present. 2 0-11,000 years before present. 3 City of Huntinbnon Beach Seismic Safety Element,1974. 4 City of Huntinbnon Beach Geotechnical Inputs,1974. 5 City of Huntington Beach Seismic Safety Element,1974. 6 City of Huntin6non Beach Seismic Safety Element,1974. - 7 City of Huntinbnon Beach Seismic Safety Element,1974. 8 Sprotte and others,1980. THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-3 Exhibit"A"- Resolution No.2009-49 U � N U Q O m GD d w N W O SEAL I/ I. WESTMINSTER BEACH BOLSA) I �• _ I Mc z z I FADDEN 3 o _.I Z EDINGER .�. HEIL WARNER FOUNTAIN VALLEY SLATER WE 4� •S.� •� I s °�F� ® COUNTY OF. TALBERT °'�R�yj • ORANGE �. (BOLSA CHICA) ELLIS o S • m m 3 �.� / GARFIELD `•`1®sue L % YOWOWN A ADAMS PACIFIC ' OCBAT! I INDIANAPOLIS / ATLANTA ��ifr I HAMILTON �1 BANNING Legend COSTA City Boundary � 'F % MESA High Potential for all Coastal Bluffs { Low Potential Very Low Potential No Potential r Source: County of Orange,1987,Orange County Hazardous waste Management Plan POTENTIALLY UNSTABLE SLOPE AREAS nil10<ik� E �2 CITY OF HUNTINGTON BEACH.GENERAL.PLAN V-EH-4 Exhibit"A" Resolution No.2009-49 Q U J, cn U Q 0 m p til cn Uj SEAL " WESTMINSTER BEACH I BOLSA cr _ Q U I' w - g p ::.:;. :h:: U r. Mc 4 co EDINGER p� •}:v'{•i of L� .�. L.•.•ySS 'r.FS•.•'.. •>Y•]N� .............. i\:.•• t..S. :.v::. a.::�'•'.i:i :::..: :::::::::::::::: .5� ..•A HEIL <.�c.}•..-.ram' ,}?e. 5 ..•:.. '•frnl W'. 30J "- y WARNER FOUNTA IN VALL EY 405 AT S E I s 9 ti F co $ � TA PIT lot, •� 9G� F- -ter Q 2 Q LIS _ Q Y�° Z = p o m p a co m � com 3 yd GARFIELD V EP Z YORKTOWN A 4 ADAMS w • IANAPO I I I ND L S anaNra • HAMILTON Legend eed BANNING City Boundary i t >30 Feet COSTA MESA `« 130 Feet 0 et 5-t Feet 0 35 Feet et <3 Feet et Source:Compiled b Tinsley,J.C. and others 1985 USGS Professional Paper 13 60 F ure 147• P Y y aP � h 1 S r and others, 980 from one P • NEAR SURFACE WATER MEW' mq- 05 l %j CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-5 Exhibit"A"- Resolution No.2009-49 SIERRA BASIN �\ ®Igo,m.6.3. NEVA®A. Owoos A D \ L.. CENTRA`. r Valley ' Y 1193 orkf laidMa VA L.!L.E Y ...::.;. 1946, s8.0® p arrizo San Luis >® Plain Oblapo (8 1 ma 7.0 Fort P��pd ` ®194T M a6.°S G M®JAVE',`\ �'�� Mlmdok NSV Pt.Conception tB Santa t , U. Is�84 � A NG � 199 �MaT.3 6 0e, t p Santa Cruz kv Island A4a&4 1 70 Salton Sao 06. cotclino Brawl '�<r Broatlay Island �r t �® Zan ® �� 1942 son 0iepo -� w�USA_ --, . 14 48 mm/yr � .:. 9AEXICO ` M 6,4 SOURCE:Scientists of the USGS and Southern California Earthquake Center,1994; Science,October 21,1994 figure 1, REGIONAL FAULT MAP rz52 0 50I m 100 Kn. g Eln' City of Huntington Beach General Plan V-EH-6 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT 2. Faults a. General All of southern California geology and seismicity is affected by plate tectonics and the forces which cause these plates to move within the earth's crust. Faults are formed at the plate boundaries and within the plates (Figure EII-4). Those which cause the plates to slip horizontally past one another are strike slip faults . while mainly vertical movement is along normal, reverse or thrust faults9. These fault movements cause earthquakes deep in the crust and may cause surface fault rupture or deformation along buried(blind)thrust faults. This seismotectonic setting has been a part of the evolution of the Los Angeles/Orange County landscape for the past 5 million years or so. The most important fault to the City is the Newport-Inglewood. b. Newport-Inglewood Fault Zone The .Newport-Inglewood fault zone is an active right-lateral fault system consisting of a series of en echelon10 fault segments and anticlinal folds" that are believed to be the expression of a deep-seated fault within the basement rock.12. The fault zone is visible on the surface as a series of northwest-trending elongated hills, including Signal Hill and the Dominguez Hills, extending from Newport Beach to Beverly Hills. The total fault length is about 44 miles. The surface and subsurface segments of the fault in the City are shown on Figure EH-5. The estimated maximum earthquake assigned to the fault zone is magnitude (M) 7, based on its estimated rupture length versus magnitude relationship by Slemmons(1982) and its slip rate. The.expected(average) amount of surface fault rupture on any given fault trace for the maximum probable or maximum credible earthquake range from zero to one foot or so for magnitudes under M6.0, and from one foot to ten feet or more for magnitudes between M6.0-7.5. C. Other Fault Segments,Activity Criteria,and Fault Zoning Faults adjacent to, within and beneath the City may be classified as inactive, potentially active, or active. Faults classified as inactive (no demonstrated movement in the past 2 million years) are of no present concern as earthquake sources and are not discussed further. Potentially active faults show evidence of movement and may be possible earthquake sources, but no data are known to conclusively demonstrate Holocene fault movement (within the past 10,000-12,000 years). Active faults are the most concern for earthquake generation and fault rupture potential since they have documented Holocene fault movement or are clearly associated with historic seismicity. Alquist-Priolo Earthquake Fault (formerly Special Studies) Zone Maps delineate active faults and potentially active faults considered by the State to be "sufficiently active"and"well-defined." The City Seismic Safety Element(1974)delineates fault zones of concern in the City; these are fault segments within the Newport-Inglewood fault zone which were deemed active of potentially active at the time the City of Huntington Beach Seismic Safety Element was adopted (1974). The California Division of Mines and Geology(1992) has delineated Alquist-Priolo study zones within the City along the Newport-Inglewood fault zone. 9 A fault with a dip of 45 degrees or.less with horizontal compression rather vertical displacement - 10 Faults that are in an overlapping or staggered arrangement. 11 Convex upward folds with cores containing the stratigraphically older rocks. 12 Bryant.1988:Barrows,1974.- THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-7 Exhibit"A"- Resolution No.2009-49 � w g 0 Z o W Lol* I. SEAL i WESTMINSTER BEACH BOLSAI I -- o x i I � o. Mc o g I — FADDEN EDINGER HEIL WARNER FOUNTAIN VALLEY ` 405 •` •SLATER ®®®• 4 . TALBERr c�FR `m� ®®♦� I ` ` ' ELLIS o o°e Bid N` /ATLAN GARFIELD YorkLEGEND °°' ®� �' auttCity BoundaryOLIS Category AAiquist Priolo Special Studies Zone O e \ I ®® Category B p9�'9c ®I Special Studies,including subsurface investigation, HAMILTON for critical and important land uses and special T ° evaluation offaub for all habitable structures % BANNING Category C \\ . Special Studies,includ'mg a subsurface investigation, ® COSTA for critial and important land uses MESA Category D Inactive or non-e4 tanl;subsurface investigation PACIFttr may be required by City OCEAN ?9 Fault Uncertain SOURCE City of Huntington Beach,1974 Seismic Sagely Sement,Fgure 3.1; „ modified using Leighton&Associates,1986,Fgures 2 and 3 NEWPORT-INGLEWOOD FAULT ZONE "7 t.o Wj��Z IBM CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-8 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT These zones generally coincide with a portion of the fault zones of concern in the 1974 Seismic Safety Element, specifically the southern segment of the North Branch fault. Upon review of the State.Division of Mines and Geology's original determination by Leighton&Associates(1986), faults were suggested to be four categories(Figure EH-5). Extensive fault activity investigation work for the Bolsa Chica Project13 in large part confirmed the opinion of 1986 Leighton&Associates. In addition,the section of the northern segment of the North Branch fault within Bolsa Chica(as shown on the City of Huntington Beach's 1974 Seismic Safety Element fault map)is also considered active, and therefore equivalent to the "A" faults of Leighton & Associates. This investigation also concluded that the South Branch is classed neither active nor.potentially active on the Bolsa Chica site, and the Bolsa-Fairview fault segment is pre-Holocene, but considered potentially active lacking specific field data to the contrary. No opinion was made regarding other faults shown on the City's 1974 Seismic Safety Element map. d. Buried(Blind)'Thrusts The aforementioned strike=slip fault types have surface expressions (fault traces) which allow zoning in order to.reduce the potential effects of fault rupture on structures. The blind or buried thrusts have been the focus of more study since the 1987 Whittier Narrows magnitude(M) 5.9 earthquake and the 1994 M=6.7 Northridge earthquake. These faults typically do not offset surface deposits, however do generate co-seismic uplift and movement on fault traces at substantial depth. Table E11-1 lists the following: 1) active or potentially active faults which may affect the City, including segments of the Newport-Inglewood fault zone in the City which are deemed capable of producing fault rupture due to co-seismic or primary seismic activity; and 2)the blind thrusts which are discussed below as earthquake sources. C. Earthquake Ground Shaking Both the strike-slip faults and blind thrusts identified in Table EH-1 have been identified in the region as either having generated or being capable of generating significant earthquakes. The near-City region has experienced several significant earthquakes in historic times which are catalogued by many authors(Figure E11-6). Large earthquakes in 1769 (name not identified), 1812 (possibly Newport-Inglewood),. 1855 (Newport-Inglewood or concealed fault of unknown name),and 1920, 1933,and 1941 (Newport-Inglewood) have been associated with faults located in or near the City. The magnitude 6.3 1933 Long Beach earthquake actually occurred near Huntington Beach/Newport Beach on the Newport-Inglewood fault zone about 3.5 miles into the offshore area. Frequency of Occurrence and Magnitude Based on discussion by Dolan et al. (1994), some rough estimates of earthquake recurrence intervals are: 1) for a magnitude M7.6 over an entire zone of the Elysian, Compton-Los Alamitos, and Palos Verdes faults was 3,300 years, and 2) for the Newport-Inglewood fault zone 200-2,000 years for a M7+event based on a wide range of possible slip rates. The Bolsa Chica EIS/EIR (1992) determined that the slip rate of 0.5 mmlyr was appropriate; this yields a recurrence interval at the high end of the 200-2,000 year range for the M7+.event. 13 County of Orange, 1993, THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-9 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER Environmental Hazards Element TABLE EH-1 Active/Potentially Active Faults Which May Affect the City of Huntington Beach FAULT NAME;-, ! IPAT RILN� TI©l�l EAR'I HQUAKE 4 � '1 (distauce to City fDCD � COMPASS accelera gw FAULTS WITH MAPPED SURFACE TRACES Elsinore[28] No NW-SE 6.75 7.5 0.11-0.18g Newport-Inglewood Yes NW-SE 5.75 7.0 0.55-I.Og [<2] Palos No NW-SE 6.75 7.5 0.34-0.53g Verdes-Coronado Bank[10] Raymond[30] No E-W 4.0 7.5 0.02-0.21g San Andreas.[5I] No NW-SE 8.0 8.3 0.11-0.14g [long period motions impt.] Sierra Madre-San No E-W 6.0 7.5 0.07-0.20g Fernando[32] Whittier-North No NW-SE 6.0 7.5 0.11-0.30g Elsinore[19] LIND OR BURIED THRUST FAULTS Elysian Park[25] . No E-W,WNW-ESE 5.75 7+ Whittier 5.9 Compton-Los No NW-SE 5-6? 7+ Little known; Alamitos[<10] possible association w/NIFZ Torrance- No NW-SE 5-6? 7+ Little known; Wilmington[<10] apparent association w/PVFZ THE. CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-10 Exhibit"A"- Resolution No.2009-49 1 CALIFORNIA NA V�E D � MONTEREY / AR I Z NA X \\ a� X X XX LO -AN LES A X X X X X \ \ X X X X X �SAN DIE \ PACIFIC OCEAN EXPLANATION SITE LOCATION CD (+): M = 8.0 + Latitude - 33.6875 N Q M = 7.077.9 Longitude — 118.0000 W Q M = 6.0-6.9 ,L M = 5.0-5.9 X M = 4.0-4.9 SOURCE:Envicom,1994,using EQSEARCH by Blake,1994 update REGIONAL EARTHQUAKES WITHIN 100 MILES OF CITY o 100 z E ®6 3 Jr City of Huntington Beach General Plan V-EH-11 Exhibit"A" -Resolution No.2009-49 HAZARDS CHAPTER Environmental Hazards Element Faults in the region are shown on Figure EH-4; the associated earthquake epicenters (Richter magnitude M> 4.0 within 100 miles) since 1800 are shown on Figure EII-6. Table EH-1 gives the geologic and estimated earthquake parameters associated with each fault within 50 miles (the San Andreas is 51 miles away). From a planning perspective,these are the faults which are most likely to have significant affects on the City during the foreseeable future with regard to producing seismic hazards. Moderate to large earthquakes can occur on.previously unmapped and unexpected fault or fold structures possibly yielding much higher ground shaking intensities than previously considered.14 Earthquake epicenter data developed for this study (Figure EH-6), suggest that the 6.5 to 7.0 magnitude event represents a realistic magnitude of earthquake upon which to base structural design for the City. The Uniform Building Code provides standards for a seismic design of structures which have been used to provide the currently acceptable level of protection to most structures and occupants. Intensity and Acceleration The two most consistent (covering the entire City) data bases for assessing ground shaking hazard potential are the Toppozada and others(1988)planning scenario study for major earthquake(magnitude 7+)on the Newport-Inglewood fault zone, and the Caltrans15 estimates of peak horizontal acceleration from maximum credible earthquakes(MCEs)for rock and stiff-soil sites. The Toppozada and others map 5-S(1988)shows the modeled seismic intensity distribution using the Modified Mercalli Intensity (MMI) scale standard (Table EH-2). The MMI intensity values presented are XI for the floodplain(gap) areas (a XI+along the . fault zone) and an VIH+ for the mesa areas. These intensities would undoubtedly be higher in the liquefaction prone areas. Mualchin and Jones (1992) published a map of peak horizontal ground acceleration(PGA) contours based on data through 1989. The City falls within a zone of 0.6g estimated PGA which is their highest contour level. Scientists of the U. S. Geological Survey and the Southern California Earthquake Center'.6 suggest that"When earthquakes occur directly beneath a city,it will be subjected to ground motions approaching the force of gravity[1.0g],exceeding the amounts of shaking anticipated by building codes in some respects." 'fable EIS-1 shows deterministic values for the Newport-Inglewood of lg. (maximum credible) and 0.55g (maximum probable) using mean plus one sigma values17 which better fit the Landers earthquake data for short distances from the fault.".This suggests a range of 0.27g-0.55g for normal design considerations. 14 L.A.Times,October 21,1994;Science,October 21,1994. - 15 Mualchin and Jones,1992,but updated only through 1999. 16 Science,October 21,1994. . 17 Campbell,1993 in Blake,1993 update. 18 Campbell,1994. THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-12 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT B. LIQUEFACTION The liquefaction susceptibility for the City is based on Tinsley and others (1985) who used occurrences of shallow water and alluvial deposits to define the areas shown on Figure EH-7 as very high,high,medium, and low. Liquefaction is the condition in relatively loose, saturated sandy sediments where internal shear strength is lost due to the repeated vibrations from earthquake shaking. Dynamic (seismically-induced) settlement can occur under these same conditions where sediments are only partially saturated. These types of failures have been observed in the,1933 Long Beach, 1971 San Fernando, and the 1994 Northridge earthquakes. Where alluvial areas have a surface slope of 0.5 to 5 percent,or more,flow failures and lateral spreading(a shallow landslide)can occur. C. TSUNAMI AND SEICHE Tsunamis are long period, seismically generated sea waves caused by seafloor displacements (faulting or landslides). Previous evaluations19 put the tsunami hazards potential for the City at very low. The elevation of the run-up beyond the initial tidal elevation can be generally estimated from"maximum'.'past occurrence in California (estimated at 4-19 feet) from distant (South Pacific-South America-Alaska) or local (Santa Barbara Channel) earthquakes (Figure EH-8). Studies for the Bolsa Chica Project20 indicate 100-year and 500-year runup elevations of 5-6 feet and 7-9.5 feet,respectively. Seiches are generated by the"sloshing"of water in an enclosed or partially enclosed body of water caused by displacement within the water body, or more likely.longer period earthquake motions. Of the most concern are seiches that are caused by tsunamis captured and reflected within the enclosed area of an inner harbor such as occurred in Los Angeles-Long Beach following the 1964 Alaskan earthquake. Huntington Harbour reported a 4-foot rise in water levels and damage to some moored boats. Seiche area damage would be most severe in the same areas as tsunami hazards. D. SUBSIDENCE The location of major oil drilling areas and state-designated oil fields are areas with subsidence potential; the pattern of subsidence (between 1-10 inches during 1976-1986) has been documented in an area corresponding roughly to the limits of the Huntington Beach Oil Field (Figure EH-9) with the maximum (about 5 feet) located roughly at the corner of Golden West Street and Pacific Coast Highway" Re- pressurization by injection(water flooding).has been.used to stabilize this vertical movement.. The rate of subsidence (about 0.6-1 inch/year) should diminish for fields with water flooding or re-pressurization programs;otherwise this rate could be continuing today. 19 Geotechnical Inputs,1974. 20 USACOE/City of HuntinLKon Beach,1992. 21 Morton and others.1976. - 22 ANGUS Petroleum,1986;Division of Oil,Gas.R Geothermal Resources,1992. THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-13 Exhibit"A"- Resolution No.2009-49 Masonry A,B,C,D:To avoid ambiguity of language,the quality of masonry,brick or otherwise is specified by the following lettering. Masonry A. Good workmanship,mortar and design;reinforced,especially laterally,and bound together by using steel,concrete,etc.;designed to resist lateral forces. Masonry B:,Good workmanship and mortar;reinforced,but not designed in detail to resist lateral forces. Masonry C: Ordinary workmanship and mortar;no extreme weaknesses like failing to tie in at corners,but neither reinforced nor designed against horizontal forces. Masonry D; Weak materials,such as adobe;poor mortar;low standards of workmanship;weak horizontally. I. Not felt.Marginal and long-period effects of large earthquakes 11. Felt by persons at rest,on upper floors,or favorably placed. Ill. Felt indoors.Hanging objects swing.Vibration like passing of light trucks.Duration estimated.May not be recognized as an earthquake. IV. Hanging objects swing.Vibration like passing of heavy trucks;or sensation of a jolt like a heavy ball striking the walls. Standing motor cars rock.Windows,dishes,doors rattle.Glasses clink.Crockery clashes.In the Upper Range of IV wooden walls and frame creak. V. Felt outdoors;direction estimated.Sleepers wakened.Liquids disturbed,some spilled.Small unstable objects displaced or upset.Doors swing,close,open.Shutters,pictures move.Pendulum clocks stop,start,change rate. VI. Felt by all.Many frightened and run outdoors.Persons walk unsteadily.Windows,dishes,glassware broken. Knickknacks,books,etc.,off shelves.Pictures off walls.Furniture moved or overturned.Weak plaster and Masonry D cracked.Small bells ring(church,school).Trees,bushes shaken visibly,or heard to rustle. VII. Difficult to stand.Noticed by drivers of motor cars.Hanging objects quiver.Furniture broken.Damage to masonry D, including cracks.Weak chimneys broken at roof line.Fall of plaster,loose bricks,stones,tiles,cornices also unbraced parapets and architectural ornaments.Some cracks in masonry C.Waves on ponds;water turbid with mud.Small slides and caving in along sand or gravel banks.Large bells ring.Concrete irrigation ditches damaged. VI1L Steering of motor cars affected.Damage to masonry C;partial collapse.Some damage to masonry B;none to masonry A Fall of stucco and some masonry walls.Twisting,fall of chimneys,factory stacks,monuments,towers,elevated tanks. Frame houses moved on foundations if not bolted down;loose panel walls thrown out.Decayed piling broken off. Branches broken from trees.Changes in flow or temperature of springs and wells.Cracks in wet ground and on steep slopes. IX. General panic.Masonry D destroyed,masonry C heavily damaged,sometimes with complete collapse;masonry B seriously damaged.General damage to foundations.Frame structures,if not bolted,shifted off foundations.Frames racked.Serious damage to reservoirs.Underground pipes broken.Conspicuous cracks in ground.In alluviated areas San and mud ejected,earthquake fountains,sand craters. X. Most masonry and frame structures destroyed with their foundations.Some well-built wooden structures and bridges destroyed.Serious damage to dams,dikes,embankments.Large landslides.Water thrown.on banks of canals,rivers, lakes,etc.Sand and mud shifted horizontally on beaches and flatland.Rails bent slightly. XI. Rails bent greatly.Underground pipelines completely out of service. FXIL Damage nearly total.Large rock masses displaced.Lines of sight and level distorted.Objects thrown into air. 1. Original 1931 version in Wood,H.0.,and Neumann,F.,1931.Modified Mercalli intensity scale of 1931:Seismological Society of America bulletin,v.53,no.5,p.979-987. 2. 1956 version prepared by Charles F.Richter,in Elementary Seismology,1958.p.137-138.W.H.Freeman&Co. SOURCE:Buena Engineers,Inc.Preliminary Geotechnical Engineering Report(May 1989) MODIFIED MERCALLI INTENSITY SCALE OF 1931 1, (1956 Version)' mE HH'-2% CITY OF HUNTINGTON BEACH GENERAL PLAN ~ V-EH-14 Exhibit"A"-Resolution No.2009-49 U p -C a = 3 m � o LU w . . . � 3 \ � w 0 WESTMINSTER SEAL BEACH r3oLSA Y Z m Uj z. c Z > $ �FADDEN 3 a z EDINGER HEIL xl•.x�v :<6Y ��• •�'til"1'M1•'pY+ :.:b•: X.:.., ••}Y;• < WARN ER FOUNTAIN .L C, VALLEY > :> r 9 N F c COUNT 0 F 0 Y aT »:. ALBE R OR N 9 A GE r en . BOLSA CHIC } a ¢ J ¢ 2 0 ' ELL IS Z Q Y O 2 O Ncc O m m G FI AR ELD :Y - ;,yv YORKT0 WN 's '.ti•' •a DAM S 1 M1. NAP I NDIA OLIS rr A A NT 4 TLA HAMILTON BANNING Legend CO STA CityBoundary MESA O o Potential oenl to P I L P nil H-M High to Medium Potential a (H-VH)High to Very Potentia l (VH) VeryHi h Potential Source:Tinsley,J.C.and others 1985 USGS Professional Paper 1360 Figure 148 � � 9 LIQUEFACTION POTENTIAL Uj CITY OF HUNTINGTON BEACH GENERAL PLAN 1=18 R77 V-EH-15 Exhibit"A"-Resolution No.2009-49 0 N Z W a l 9 SEAL I/• WESTMINSTER BEACH BDLSA Mc o g z I FADDEN EDINGER .` HEIL WARNER FOUNTAIN _. VALLEY • SLATER 405 s .TALBERT 0 FRAY} ELLIS s N 0 '• ® GARFIELD Z ; YWTOWN A `q! /ADAMS / INDIANAPOLIS PACIFIC , OCEAN I ATLANTA }?dER HAMILTON of BANNING ?' COSTA E MESA LEGEND •� City Boundary Moderate Tsunami Run-Up Area MODERATE TSUNAMI RUN-UP AREA ° °S 1.0 z CITY OF HUNTINGTOWBEAC.H GENERAL PLAN V-EH-16 Exhibit"A"- Resolution No.2009-49 U � o cla U Z 0 m \ / W I�1 C WESTMINSTER SEAL BEACH BOLSA) o. Mc o wo z I — FADDEN a Z EDINGER HEIL -` WARNER FOUNTAIN VALLEY • 405 •`. SLATER •`• •`• I TALBERT NTY OF iyy GE BO SACHICA) ELL At* ' GARFIELD YORKTOWN ADAMS INDIANAPOLIS Jr ATLANTA Pq�F !l PACIFIC OCEAN ?IER ry� HAMILTON BANNING COSTA MESA Legend City Boundary . SOURCE:Omp County Surveyors Office;from Angus Peholeun,1988,Appendix 2,page 33Pp SUBSIDENCE AREAS FROM 1976-1986 0 05 kH-91.0 CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-17 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER Environmental Hazards Element E. METHANE Figure EIS-10 indicates the areas that have been affected by methane gas and have been designated.as Methane Overlay Districts. Huntington Beach was identified as a high-risk area relative to methane gas migration into and/or from the shallow geology (peat and organic) deposits in the Roberti Report which discussed several oil fields." A later study by GeoScience Analytical14 indicating biogenic methane lead to the City enactment of methane seepage district regulations for these areas. All oil fields are considered high risk areas for methane seepage. The main conduit for petrogenic methane is through abandoned oil wells. Therefore,all areas which lie above or in the immediate vicinity of one of the identified major oil field areas or drilling areas in the City are potentially areas of concern. Methane may.also be trapped beneath impervious surfaces (e.g., parking lots) or in enclosed underground areas (e.g., basements, subterranean garages,tunnels)where concentrations may cause an explosion or hazardous breathing conditions. F. FLOODING The Federal Emergency Management Agency(FEMA) has evaluated the City of Huntington Beach for its potential to experience flooding. Bolsa Chica and Huntington Beach Mesas have been determined to . experience minimal flooding during major,rainstorms. The northern part of the City would.be subject to flood depths of one to three feet (Figure EIS-11). The area of greatest flooding would occur in the Santa Ana gap between Huntington Beach Mesa and Newport Beach Mesa. Estimated flood elevations in this area are described as an elevation rather than a depth. Depending upon the location within that area, flood depth could be between three and six feet. Flood depths of seven feet would occur along the beach. Areas of localized flooding could reach depths exceeding nine feet. Flooding will affect several government and public facilities and numerous private residences and commercial operations. The sewage treatment plant, fire stations,major highways,high schools,elementary schools, Southern California Edison Plant, major utility corridors, several neighborhood and community commercial centers,and thousands of private residences would be adversely affected. G. OTHER GEOLOGIC AND SOILS ENGINEERING HAZARDS .Geologic and soils conditions vary across the City. Conditions include expansive (Figure EIS-12) and compressible soils, hydroconsolidation-prone sediments, peat (Figure EIS-13) and other poor foundation materials,highly erosive deposits,and steep topography. Peat and organic soils occurrences are estimated to be quite widespread in the City in former marshes and closed depressions where quiet water and vegetation were abundant.. Peat and organic soils are highly susceptible to large long-term settlements due to their low_ density. Potential landslide areas within Huntington Beach are limited to those areas near the mesa bluffs, although no historical problems associated with landslides have occurred in the .area. Thorough geologic investigations will be important in this area prior to development to insure slope stability. 23 ANGUS Petroleum.1988. 24 ANGUS Petroleum.1988. THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-18 Exhibit"A"- Resolution No.2009-49 w � � Z o o W —• W SEAL I - �.1 CD WESTMINSTER BEACH BOLSA� — o •I Mc it z ' — FADDEN g � � w — -EDINGER HEIL --` WARNER FOUNTAIN VALLEY 405 •` •SLATER COUNTY OF •TALBERTiyy • ORANGE (BOLSACHICA) ELLIS GARFIELD YORKTOWN 'ADAMS PACIFIC ' INDUWAPOLIS OCEAN ATLANTA ,l HAMILTON BANNING COSTA MESA Legend City Boundary Methane Oveday District Source:City of HunWgton Beach,1990,Draft Safely Element Update,Figure 6.3.1 :. METHANE OVERLAY DISTRICTS ° °� t-0 CD � wSER 10 CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-19 Exhibit"A"- Resolution No.2009-49 w Q p SEAL CDWESTMINSTER BEACH BOLSA�:.:�: — o Y Z CD0 Depth < 7. EDINGER • .s HEIL Minimal " Floodin WARNER—e WER FOUNTAIN Depth<1' VALLEY I •` SLATER COUNTY OF •TALBERT CO�Q ORANGE � � "1 (BOLSA CHICA) MIS o Minimal _ m® '�. Flo in / GARFIEtD a 1�7 r 1 s YORKTOWN PACIFIC . OCEAN Arts ADAMs t INDIANWLIS u 9 ATLANTA LEGEND / HAMILTON City Boundary k / BANNING Minimal Flooding / x , . COSTA MESA / Depth<1' � Depth 1-3' Flooding with Wave Action SOURCE:FEMA,1996 = 100&500 YEAR RAIN FLOOD LEVEL CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-20 Exhibit"A"- Resolution No.2009-49 U W U Z � W m SE WESTMINSTER BEACH BOLSA o = m y 2 g o Mc FADDEN EDINGER • HEIL a WARNER FOUNTAIN VALLEY 405 SLATER Lp COUNTY OF TALBERT , • ORANGE �• (BOLSA CHICA) •. H Q � •` _ELUB � •` ; m m 'Ti •` l GARFIELD YORKTOWN ADAMS PACIFIC OCEAN INDIANAPOLIS ATLANTA 9i 'r HAMILTON Legend s BANNING •� City Boundary COSTA Moderate to High(209/6-42%) MESA Low to Moderate(6%-27%) Low(7%or Less) Variable Ai 7"1- Source: of Hu Cily attre0oo Beach,1974,Geotedhnical InlpAs (to the Seismic Safely Elemenq,Figure 38 ,T EXPANSIVE SOIL DISTRIBUTION MAP o os Er Li � CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-21 Exhibit"A"- Resolution No.2009-49 r; � a. 'tag;i}^��*.•+ .� \ 1 �I £ 1 zYYLLi — TALK ADAMS I� M PROBABLE LOCAIM OF PEAT I F 2 ®WTO 5rMX UM OF PEAT. 510 25 MCK UM OF PEAT ®OVM 25M M LAM OF PEAT M MARSH—IM1905,OR 10 -- f - Source:atyo(Huntingt n Beach,1974,Geotechnical Inputs (to the Seimic Safety Element),Figure 3-7 PEAT AND ORGANIC SOILS CH-"0 6.� Z EH-1 3 CITY OF HUNTINGTON BEACH GENERAL PLAN V-EI-�-22 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT Soil erosion in Huntington Beach ranges from a slight to a high hazard. With proper ground cover and drainage.controls, the erosion is minimized. The seaward facing bluffs of Huntington Beach are subject to erosion during periods of extremely high tides. If beach sand replenishment has not maintained an adequately wide.beach and the beach has.narrowed due to the net loss of sand, the bluffs would be susceptible to ocean flooding and wave erosion endangering structures and people on the overlying mesa surface. The perched.(shallow)water table is high throughout the entire City of Huntington Beach. Most of the soils also cause water to percolate very slowly downward into deeper layers so any water entering the soil tends to remain fairly near the surface,or in local ponds. Each of these other conditions represents a potential hazard that is routinely evaluated by standard soils and foundation engineering and testing required.by City of Huntington Beach grading and building codes. These hazards are to be considered on a site-specific basis as projects within the various areas of the City are initiated. ISSUES 1. The City of Huntington Beach lies astride segments of the Newport-Inglewood fault zone which have been determined to have fault rupture potential. These segments pass beneath existing developed areas and areas which would be developed under the General Plan. (EH 1.1.1, EH 1.1.2, EH 1.1.3, EH 1.2.1, and EH 1.2.2) 2. Due to Huntington Beach's location to the Newport-Inglewood fault zone, strong shaking may be higher than many other areas.(EH 1.1.1,EH 1.1.2,EH 1.1.3,EH 1.2.1 and EH 1.2.2) 3. Due to the high water table condition and the tightness of the subsoils of Huntington Beach, liquefaction and seismically induced settlement may be experienced in many areas of the City during strong earthquakes.(EH 1.1.1,EH 1.1.2, and EH 1.2.1) 4. Due to the location on the coast the City is subject to potential run-up and tsunami damage from both distant and locally generated tsunamis, although past experience indicates that this potential is low. Seiche damage would likely be associated with a tsunami.(EH 5.1.1. and EH 5.1.2) 5. The failure of Prado Dam near the head of Santa Ana Canyon poses a flooding threat to the City which would only be realized if this.flood control basin were nearly full during the,causative earthquake. (EH 4.1.1,EH 4.1.2,EH 4.2.2, and EH 4.2.4) 6. Erosion of soils left barren of vegetation can occur due to agents such as wind and rain. Proper vegetative cover and drainage will limit the amount of erosion to a level of insignificance. (EH 1.1.1 and EH 2.2.1) 7. The rate at which water can percolate into the soil varies amongst the soils of Huntington Beach, but is generally.slow. Long term ponding of water during heavy rains or long term periods of precipitation is likely in some areas. (EH 1.1.1 and EH 4.1.1) 8. Expansive soils of Huntington Beach vary in their shrink-swell characteristics. Soils with a high shrink-swell potential may produce damage to overlying structures as they experience changes in moisture levels associated with periods of rains and droughts. (EH 1.1.1) THE CITY. OF HUNTINGTON BEACH GENERAL PLAN V-EH-23 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER Environmental Hazards Element GOALS,OBJECTIVES,AND POLICIES EH 1.1.4 Evaluate the levels of risk based on the nature of the The following section presents the goals, objectives, hazards and assess.acceptable risk based on the policies,and programs for Environmental Hazards in the human,property,and social structure damage City of Huntington Beach. At the end of each policy is a compared to the cost of corrective measures to reference to the appropriate implementation program. mitigate or prevent damage.(I-EH 3 and I-EH 4)2' Each implementation program's schedule and possible funding sources are indicated. in the Environmental Objective Hazards Implementation Matrix. EH 1.2 Ensure that new structures are designed to minimize Geologic/Seismic Safety damage resulting from seismic hazards,ensure that existing unsafe structures are retrofitted to reduce Goal hazards and mitigate other existing unsafe conditions. EH 1 Ensure that the number of deaths and injuries, Policies levels of property damage, levels of economic and EH 1.2.1 social disruption, and interruption of vital services Require appropriate engineering and building practices for all new structures to withstand ground shaking and resulting from seismic activity and geologic hazards shall be within levels of acceptable risk:s liquefaction such as stated in the Uniform Building Code(UBC). (I-EH 5) Objective EH 1.2.2 EH 1.1 Establish specific priorities for improvement of Ensure that land use planning in the City accounts for existing structures based on hazard to life,type of seismic and geologic risk, including ground shaking, occupancy,method of construction,physical condition, liquefaction, subsidence, soil and slope stability, and and location.(I-EH 4 and I-EH 6)" water table levels. EH 1.2.3 Policies Rectify improperly abandoned water wells. (I-EH 7) EH 1.1.1 Maintain a complete database of the location and EH 1.2.4 distribution of seismic and geologic hazards related to Support the education and dissemination of ground shaking,liquefaction,subsidence,soil stability, information about the potential environmental hazards slope stability and water table levels. (I-EH 1, I-EH 2 that may exist in Huntington Beach. (I-EH2 and I-EH and I-EH 3) 8) EH 1.1.2 Objective Support land.use patterns, Zoning Ordinances,26 and EH 1.3 locational criteria that mitigate potential risks posed by Enhance emergency preparedness through community development in hazard areas, or which significantly education,effective emergency response and efficient reduce risk from seismic hazards. (I-EH 3; I-EH 4, post-disaster recovery. and I--EH S) Policies EH 1.1.3 EH 1.3.1 Require seismic/geologic assessment prior to Ensure that all citizens have access to information construction in Alquist-Priolo Earthquake Fault Zone regarding local environmental hazards,emergency as shown in Figure EH-5.(I-EH 3 and I-EH4) preparedness,and emergency response. (I-EH 1 and I-EH 8) 25 Mitigation Measure GS-2 as specified in EIR No.94-1,Table EX-1 27 Mitigation Measure GS-4 as specified in EIR No.94-1,Table 26 Mitigation Measure GS-3 as specified in EIR No.94-1,Table EX-1 - EX-] 2sMitigation Measure GS-5 as specified in EIR No.94-1,Table EX- I THE CITY OF H U N T I N G T 0 N BEACH GENERAL PLAN V-EH-24 Exhibit"A"- Resolution No.2009-49 HAzARDs CHAPTER ENVIRONMENTAL HAZARDS ELEMENT EH 1.3.2 EH 2.1.2 Maintain and regularly update emergency plans for Minimize beach sand loss. (I-EH 1) earthquake response.(I-EH 2,I-EH 9,and I-EH 10) Objective EH 13.3 EH 2.2 Provide the Emergency Operations Center with Increase public safety from erosion hazards through information regarding seismic/geologic hazard public awareness and education. (I-EH 1, I-EH 2 and locations. (I-EH 2) I-EH 8) EH 1.3.4 Policies Require that earthquake survival and efficient post EH 2.2.1 disaster functioning be a primary concern in the siting, Provide information to the public regarding erosion design,construction,operations,and retrofitting areas and emergency response plans. (I-EH 1,I-EH 2 standards for critical,essential,and high occupancy and I-EH 8) facilities,including public safety facilities.(I-EH 2 and I-EH 9)29 Methane EH 1.3.5 Goal Encourage property owners to take adequate steps to EH 3 protect their property against economic risks resulting Ensure the safety of the City s businesses and from seismic and geologic hazards. (I-EH 2)" residents from methane hazards. Erosion Objective EH 3.1 Goal Identify areas within the City most prone to methane EH 2 gas seepage and buildup. Reduce the potential for mesa edge and bluff Policies erosion hazards,and the potential for beach sand EH 3.1.1 loss.31 Continue to establish, through the identification of Methane Overlay Districts, areas of existing methane Objective seepage in the City as shown in Figure EH-10.(I-EH EH 2.1 1) Ensure that land use planning and City policy account for bluff and coastal sand erosion. EH 3.1.2 Continue to investigate and evaluate new sources of Policies EH 2.1.1 methane.(I-EH I and I-EH 11) Minimize bluff and mesa edge32 erosion. (I-EH I and Objective I-EH 4) EH 3.2 Minimize methane hazards in the identified Methane Overlay District, and other areas outside the Methane Overlay Districts as may later be defined,through the regulation of construction and adherence to the City's Methane Hazard Mitigation Plan.33 zy Mitigation Measure GS-6 as specified in EIR No.94-1,Table EX-1 30 Mitigation Measure GS-7 as specified in EIR No.94-1,Table EX-1 31 Mitigation MeasureGS-9 as specified in EIR No.94-1,Table EX- I �2 Mitigation Measure GS-10 as specified in EIR No.94-1,Table 33 Mitigation Measure GS-13 as specified in EIR No.94-I,Table EX-1 EX-1 THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-25 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER Environmental Hazards Element Policies, Increase public safety from methane hazards through EH 3.2.1 public awareness and education. Maintain and revise as necessary, standards of construction within identified Methane Zones.34 (I-EH Policies 4 and I-EH 6) EH 3.4.1 Provide information to the public regarding methane EH 3.2.2 areas and emergency response plans. (I-EH 8) Establish, enforce, and periodically update31 testing requirements for sites proposed for new construction F loodinQ within the identified Methane Overlay District: (I-EH 12) Goal EH 4 EH 3.2.3 Eliminate, to the greatest degree possible, the risk Provide mitigation measures ;and other assistance from flood hazards. to life, property, public intended to reduce the potential for the buildup of investment and social order in the City of methane to hazardous levels within existing buildings Huntington Beach. (residences and businesses). 36 (I-EH 2, I-EH 4 and I-EH 8). Objective EH 4.1 EH 3.2.4 Ensure that the City's flood prevention standards and Remain current on new technologies, policies, and practices provide satisfactory safeguards for public procedures to further protect against a major methane and private development. related catastrophe.37(I-EH 2 and I-EH 8) Policy Objective EH 4.1.1 EH 3.3 During major redevelopment or initial construction, Maintain knowledge of methane levels and require.specific measures to be taken by developers, preparedness for the provision of emergency services. builders or property owners in flood prone areas (Figure EH-11), to prevent or reduce damage from Policies flood hazards and the risks upon human safety. (I-EH EH 3.3.1 1,I-EH 2,I-EH 4, and I-EH 1 S) Monitor methane levels in the identified Methane Overlay District. (I-EH 1) EH 4.1.2 Establish and enforce standards which minimize EH3.3.2 financial loss and maximize protection of residents and Prepare emergency response plans for use in methane business owners' property. (I-EH 1,I-EH 2,I-EH 14, related emergencies. (I-EH 13) and I-EH 1 S) EH 3.3.3 Objective Conduct periodic training of Fire Department and EH 4.2 other appropriate emergency personnel on procedures Maintain and upgrade, as appropriate, the County of in the Methane Hazards Mitigation Plan 38(I-EH 2 and Orange and the City of Huntington Beach's flood I-EH 8) control systems in conjunction with the Santa Ana Objective River Main Stem Project to minimize hazards due to EH 3.4 flooding. . 34 Mitigation Measure GS-14 as specified in EIR No.94-1,Table EX-1 35 Mitigation Measure GS-15 as specified in EIR No._94-1,Table EX-1 36 Mitigation Measure GS-16 as specified in EIR No.94-1,Table EX-1 37 Mitigation Measure GS-17 as specified in EIR No.94-1,Table EX-1 3H Mitigation Measure GS-18 as specified in EIR No.94-1,Table EX-1 THE CITY OF HUNTING TON BEACH GENERAL PLAN V-EH-26 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT Policies Policies EH 4.2.1 EH 5.1.1 Support the Santa Ana River Main Stem Project. Identify tsunami and seiche41 susceptible areas, and (I-EH 2 and I-EH 16) require that specific measures be taken by the developer, builder, or property owner, during major EH 4.2.2 redevelopment or initial construction, to prevent or Increase the local storm drain and flood control reduce damage from these hazards and the risks upon capacity up to meet 100-year the demand of a storm. human safety(see Figure EH-8). (I-EH 1 and I--EH (I-EH 1 and I,EH2) 4) EH 4.2.3 EH 5.1.2 Coordinate with the County of Orange for the Participate in the National Weather Service or other operation of the County's portion of the flood control system for local tsunami and/or seiche42 warnings. system. (I-EH 2) (I-EH 1 EH 4.2.4 Objective Maintain the City's portion of the flood control system EH 5.2 at a level necessary to protect residents from 100-year Increase public safety from tsunami hazards through flood risks. (I-U 1,I-U3,I-U4, and I-EH2) Public awareness and education. Objective Policies EH 4.3 EH 5.2.1 Protect individuals from physical harm in the event of Provide information to the public regarding tsunami flooding. areas and emergency response plans. (I-EH 8 and I- EH 13) Policy EH 4.3.1 Peat Provide sufficient early warning and evacuation assistance to residents and others in the path of Goal flooding. (I-EH 13) EH 6 Ensure the safety of the City's businesses and Tsunami residents from peat hazards. Goal Objective EH 5 EH 6.1 Protect human life, to the greatest extent feasible, Identify areas within the City most prone to peat from tsunamis and seiche hazards.39 conditions. Objective Policy EH 5.1 EH 6.1.1 Provide information regarding tsunami, seiche, 40 and Maintain a thorough knowledge of the location and tidal/marine . hazards, . and promote methods to distribution of peat conditions in the City of minimize potential damage. Huntington Beach(Figure EH-13). (I-EH 1) Objective EH 6.2 Minimize peat hazards through the regulation of construction. (1--EH 4) 39 Mitigation Measure SD71 as specified in EIR No.94-1,Table - - 41 Mitigation Measure SD-3 as specified in EIR No.94-1,Table _ EX-1 EX-1 40 Mitigation Measure SD-2 as specified in EIR No.94-1,Table 42 Mitigation Measure SD-4 as specified in EIR No.94-1,Table EX-1 EX-1 THE CITY OF .HUNTINGTON BEACH GENERAL PLAN V-EH-27 Exhibit"A"- Resolution No.2009-49. HAZARDS CHAPTER Environmental Hazards Element Policy comprehensive mapping of groundwater EH 6.2.1 potential hazard areas in the City; Establish standards of construction within identified comprehensive mapping of peat peat zones. (I-EH 4) potential hazard areas in the City; Objective challenges to flood zone boundaries that EH 6.3 appear to.be unreasonable or incorrect; Increase public awareness about the. location and a Local Drainage Master Plan assessing hazards of peat conditions. (I-EH 8) improvements necessary .to achieve 100-year capacity for the local flood Policy control system; EH 6.3.1 Provide information to the public regarding peat request that the Orange County Surveyor condition areas and proper construction methods and update its Subsidence Book report standards. (I-EH 8) through 1993 for the Pacific Coast Highway, Huntington Beach Pump All hazards station, and Huntington Beach. The City shall perform an evaluation of the Goal data to assess possible subsidence at the EH 7 oil field and drilling areas underlying the Ensure the safety of the public, to the greatest City. Based on the results of this extent feasible, from the impacts of a natural evaluation a mitigation program for disaster. reducing the potential hazards shall be prepared for use by the City;43 Policy a Grading and Geotechnical EH 7.1.1 Investigation Guidelines manual.which Maintain and update as necessary the current local will outline the minimum proper soils Hazards Mitigation Plan (HMP) as part of the engineering and engineering geologic Environmental Hazards Element. The HMP includes study for all sites where grading will resources and information to help reduce risks and occur. Topics shall include,.but not prevent losses from future natural disasters. (I-EH 1) necessarily be limited to, soils IMPLEMENTATION PROGRAMS engineering and foundations, erosion control, peat and organic soils, slope stability, erosion, liquefaction and I-EH 1 dynamic settlement, shallow ground Studies/Mapping/Master Plans water, and fault location/activity. This a. Conduct, prepare and/or update the following manual shall be available at.the permit as funding permits: stage prior to initial feasibility and design studies in.order to enhance the comprehensive mapping of development re and seismic/geologic hazard areas in the view 44 City, including fault locations, unstable environmental review processes; soils and slope.locations, areas of high a Methane Hazards Guidance manual liquefaction potential, areas of high which will outline methane overlay seiche potential and locations of shallow districts, standards of construction, water table depth; defmition of additional hazards areas, • maps of potential bluff erosion areas; and hazard mitigation. This manual shall be available at the permit stage maps of existing methane seepage areas; prior to initial feasibility and design methane level monitoring on an studies in order to enhance the on-going basis; 43 Mitigation Measure GS-20 as specified in EIR No..94-1,Table • comprehensive mapping of flooding EX-t potential hazard areas in the City; 44 Mitigation Measure GS-1,GS-8,and GS-19 as specified in EIR No.94-1,Table EX-] THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-28 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT development review and environmental b.Continue to: review processes,45 evaluate methane sources, locations and • an assessment of potential damage to concentrations on.a site-specific basis essential utility and transportation and will include any previously infrastructure and public service unidentified methane areas in the facilities due to geologic/seismic Methane Overlay District; hazards. The findings of the assessment assume the lead role in mitigating should be utilized in the review of methane hazards in public rights-of--way proposed. development projects, and and on public property; used for maintaining and updating emergency preparedness plans;46 supplement beach sand with sand from outside sources;and • standards for tsunami/seiche studies to be completed for harbor areas, work with property owners to maintain breakwaters, and coastal areas of safe conditions on their property. concern. The City shall update its c. Use the EHE and the data from items a)and b) evaluation of the tsunami hazard, make above to prepare and submit a formal update of its standards more specific, and the seismic safety components of the Safety disseminate available information on Element requirement 49 tsunami warnings and on procedural steps to prepare the populous for such an d. The City's EOC will maintain, review and event. Mitigation measures shall be update, as necessary, the current local Hazards suggested for new construction;41 Mitigation Plan. determine the safety status of all dams I-EH 2 which may fail and cause inundation InteraQency Participation and Coordination within the City. This shall be done in cooperation with the County of Orange a. The Emergency Operations Center (EOC) will and the State Division of Safety of Dams coordinate with the Departments of Police, in order to establish the safety status and Fire, Public Works, Community Development, to determine what follow up analyses, if Community Services and other departments in any,are needed. Based on these results, preparing and maintaining earthquake and other the City shalt develop risk guidelines emergency response plans. and to allow evaluation of current b. The City will provide the EOC with maps of regulatory measures for protection of seismic/geologic hazard areas. in the City, future development;48 including fault locations, areas of high • operational strategies for the City's liquefaction potential and areas of seiche portion of the local flood control system hazard. intended to maximize system efficiency c. The City will work with and coordinate its and minimize system overload during earthquake and other emergency response plans periods of heavy rainfall;and with each school district as the school districts • a hazardous waste sites map within the prepare earthquake education programs and City. develop their own earthquake and other emergency response plans. d. The EOC will coordinate with the Building Division and the Department of Public Works to establish standards for the design and operation of public safety facilities which will 45 Mitigation Measure GSA I as specified in EIR No.94-1,Table ensure that they remain safe and functional EX-1 during and after disasters. 46 Mitigation Measure GS-24 as specified in EIR No.94-1,Table EX-1 47 Mitigation Measure SD-5 as specified in EIR No.94-1,Table EX-1 43 Mitigation Measure SD-6 as specified in EIR No.94-1,Table 49 Mitigation Measure GS-21 as specified in EIR No.94-1,Table EX-1 EX-1 THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-29 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER Environmental Hazards Element e. The EOC will coordinate with the Fire d. drainage plans addressing bluff erosion for all . Department to establish and maintain an future bluff top developments; emergency response mutual aide agreement e. the continued evaluation of all proposals for with other public agencies. new construction within the Methane Overlay f Work with FEMA to clarify, simplify and District be evaluated for necessary special interpret the floodplain development standards construction methods; in a way that benefits property owners in the f. that proposed critical, essential, and high-. City. occupancy facilities be subject .to seismic g. In conjunction with the Santa Ana River Flood review,including detailed site investigations for Protection Association(SARFPA),the City will faulting, liquefaction, ground motion lobby County, regional, state and federal characteristics, and .slope stability, and governments for funding support for the Santa application of the most current professional Ana River Main Stem Project. standards for seismic designs' . h. Coordinate_ with the Orange County g. that proposed projects located in the tsunami Environmental Management Agency to hazard areas(Figure EH-9): improve the.County portion of the local flood ° are designed to minimize beach/bluff control system up to 100-year storm capacity. erosion and the need for sand I-EH 3 replenishment along city beaches;and Alquist-Priolo Earthquake Fault Zone consider design options which reduce the potential for damage to private a. Continue to implement the Alquist-Priolo Earthquake Fault Zone requirements. property and threats to public safety,i.e., raised foundations,ground floor parking b. Implement the fault classification system with upper level uses. suggested by Leighton&Associates(April 17, 1986) with. regard to faults in the City I-EH 5 susceptible to fault rupture, and establish a Ordinances study requirement based on risk and structure a. Enforce the most current Uniform Building importance. . code adopted by the State of California., I-EH 4 b. Prepare ordinances prohibiting the location of Development Review or Environmental Review critical or sensitive facilities or high occupancy Process facilities within a predetermined distance of an During development review(site plan,"tract map,etc.) active or potentially active fault. and/or environmental review,require: I-EH 6 a. building structures proposed in liquefaction, Unsafe Structures Retrofittine or Demolition unstable soil/slope conditions, flood prone a. Continue to implement and enforce the City's areas, high water tables,peat or other geologic earthquake hazard regulations as outlined in the hazards prone areas to determine potential Municipal Code. problems and to require mitigation measures; b. Devise measures to retrofit existing structures b. a potential seismic/geologic damage assessment for methane protection. be conducted for essential public utilities (gas, water, electricity, communications, sewer) and I-EH 7 require that appropriate"mitigation measures be Groundwater Mitigations incorporated; Mitigate, or require property owners to mitigate, c. .critical or sensitive facilities and uses to be groundwater problems related to . improperly, located in areas where utility services and abandoned water wells. continuous road access can be maintained in the event of an earthquake; 50 Mitigation Measure GS-22 as specified in EIR"No.94-1,Table 5'Mitigation Measure GS-23 as specified in OR No.94-1,Table EX-1 EX-1 THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-30 Exhibit"A"- Resolution No.2009-49 HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT I-EH 8 that it was abandoned incorrectly or prior to current Public Education standards. a. The EOC will increase the development and use of verbal and written education tools I- 12 including lectures and illustrations .offered Methane Gas Testing Standards and Requirements through cable television, clubs, public and private schools, neighborhood groups, service a. Coordinate with the Building Division to organizations, youth groups, business establish methane mitigation construction organizations and any other interested groups standards such as venting systems,impermeable or organizations, regarding earthquake barriers and locational criteria. preparedness. The information will include b. Maintain testing standards and requirements for emergency.services available and strategies for new construction sites in the Methane Overlay survival and self-sufficiency in the days District. Completion of the tests and the test following an earthquake. results will be required prior to development b. Provide technical guidance and direction to review. private businesses and residents found to have methane seepage or buildup on their property. I-EH 13 c. Maintain and provide methane emergency Emergency Contingency Plans response plans to the public. a. Coordinate with the EOC to prepare a Methane d. Maintain floodplain and erosion information Emergency Contingency Plan including early available to the public. warning .procedures, an evacuation plan and emergency methane hazard mitigation e. Maintain peat information available .to the measures. public. b. The City's EOC will maintain flooding I-EH 9 contingency plans which provide for early Staff Training warning, evacuation assistance, as needed, and damage assessment after the event. Continue to implement City employee emergency training drills. c. Continue to support, assist and expand the Community Emergency Response Team I-EH 10 (CERT). Disaster Recovery Committee d. Coordinate with local school districts in the Establish a Disaster Recovery Committee which will preparation of.emergency contingency plans, include representatives from EOC,Planning,Building, including early warning procedures,evacuation Public Works, Fire,Police; local utility providers and plans,emergency facility and shelter utilization, local emergency'medical providers. This committee and emergency services availability. should participate in planning for post disaster assessments, rapid reconstruction, emergency housing I-EH 14 and emergency funding and shall develop guidelines Flood Insurance Programs defining"chain of command"and responsibilities. a. Participate in the National Flood Insurance Program in a manner that provides the most I-EH 11 financial and physical protection to residents Abandoned Oil Well Re-Evaluation and property owners in the City while Establish a program to re-evaluate the safety and status minimizing costs to them. of abandoned oil wells within the City, pursuant to b. Participate in the FEMA's Community Rating Public Resources.Code Section 3208.1. " The plan System to reduce flood insurance premiums for should specify that reevaluation should occur during property owners in the City. . major redevelopment or initial construction on the site of an abandoned oil well when it can be determined 52 Mitigation Measure GS-12 as specified in EIR No..94-1 Table EX-1 THE CITY OF HUNTINGTON. BEACH GENERAL PLAN V-EH-31 Exhibit"A" -Resolution No.2009-49 HAZARDS CHAPTER Environmental Hazards Element I-EH 15 FEMA Development Standards Adopt and enforce the most recent floodplain development standards promoted by the Federal Emergency Management Agency(FEMA). I-EH 16 Santa Ana River Main Stem FundinE Pursue local funding to contribute to the Santa Ana River Main Stem Project. I-EH 17 Local Tsunami Warnings Wire System Use the Weather Wire's information from the National Weather Service or other appropriate warning systems to detect and warn of tsunami occurrences and other weather conditions in the region. This system should be monitored by the Marine Safety Division, which presently receive daily reports on weather conditions for marine operations. This warning system should be incorporated into the City's Emergency Preparedness Plan. . THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-32 Exhibit"A"- Resolution No.2009-49 ADMINISTRATION i i 1 J� o m` ii : E acip �' I t j c E W 1 niutEi n, 0 0 o ? W S s a`3 U- m; c' d: E c m : - 0 Cl) tS_ i EI_ o � 7 � j c i c •4 �i �i I ; O c 0 o; LL ' ni G � LL E: O€�: I€ 49 CD a Ei E p - yy L p O: O U i L( O i 0! N U, O I may- O I N N i N USU':WLL'J ddidiU co C7 i Q iU i0' C:9islA IL No. Name CITY OF HUNTINGTON BEACH CITY OF HUNTINGTON BEACH PROGRAM RESPONSIBLE AGENCY FUNDING SOURCE SCHEDULE EH-1 jStudies/Mapping/MasterPlans ®; • • • • • • • Ongoing• EH-2 ;Interagency Participation and Coordination •; • I • • ' • • • E ongoing EH-3 ;Alquist Prtolo Earthquake Fault Zone • - • E Ongoing• EH4 Development Review or Environmental Review Process • i ' •! ® • f • ongoing I _ EH-5 Ordinances ®i ® • i • ongoing' EH-6 Unsafe Structures Retrofitting or Demolition • T• ongoing — .. .. ...... EH-7 Groundwater Mitigations j • • wing' .............:..... EH-8 Public Education • i • I •...I. [ •.....•..' Ongoing. EH-9 Staff Training • ' • € •! • `• • • 9 • — — - -- Ongoing•- _ - EH-10 Disaster Recovery Committee • • • • • • — Ongoing' EH-1 1 Abandoned Oil Well Re-evaluation • • •. Ongoing EH-12 Methane Gas Testing Standards and Requirements • • ' • • ongoing • • • -•~ < • - •µ -- - - - Ongoing*Emergency Contingency Plans year Won EH-14 Flood Insurance Programs • ( • • • Plan op ,. EH-15 FEMA Development Standards i• ': • i • i i Ongoing. .............:------ -..........- - ... - -............ -- - —-— ----- EH-16 Santa Ana River Main Stem Funding • • • • ongoing' __.,......._..__.__._..._.....__..................._.._..._.. - - ............_. _...- - . __........_...._. .. ._., .... ...... Local Tsunami Warnings Wire System • • I Ongoing• EH-17 9 f� � -b As funding permits ENVIRONMENTAL HAZARDS IMPLEMENTATION PROGRAM MATRIX CITY OF HUNTINGTON BEACH GENERAL PLAN E2 Fil V-EH-33 Res. No. 2009-49 STATE OF CALIFORNIA COUNTY OF ORANGE ) ss: CITY OF HUNTINGTON BEACH ) I, JOAN L. FLYNN the duly elected, qualified City Clerk of the City of Huntington Beach, and ex-officio Clerk of the City Council of said City, do hereby certify that the whole number of members of the City Council of the City of Huntington Beach is seven; that the foregoing resolution was passed and adopted by the affirmative vote of at least a majority of all the members of said City Council at a regular meeting thereof held on September 8, 2009 by the following vote: AYES: Carchio, Dwyer, Green, Bohr, Hardy, Hansen NOES: None ABSENT: Coerper ABSTAIN: None Clerk and ex-offici Clerk of the City Council of the City of Huntington Beach, California ATTACHMENT #2 Jl City of IuningtonrBeaehPlannYng Departmet HUNTINGTON BEACH t, - �` ,Si tyn _ a1 sue+ -- v y:° ' s xrc t w. TO: Planning Commission FROM: Scott Hess, AICP,Director of Planning BY: Hayden Beckman, Planning Aide DATE: July 28, 2009 SUBJECT: GENERAL PLAN AMENDMENT NO. 2008-010 (ENVIRONMENTAL HAZARDS ELEMENT UPDATE) APPLICANT: City of Huntington Beach PROPERTY OWNER: Not Applicable LOCATION: Citywide STATEMENT OF ISSUE: • General Plan Amendment(GPA)No. 08-010 request: - To amend the Environmental Hazards Element of the General Plan to incorporate language identifying the City's adopted Hazard Mitigation Plan (HMP) and requiring its review, maintenance, and update as necessary. • Staff:s Recommendation: Approve General Plan Amendment No. 08-010 based upon the following: - The request complies with the requirements of Assembly Bill 2140, qualifying the City to receive up to 100%reimbursement of costs following a natural disaster. - Adopting the HMP into the General Plan by reference will enable the City to update the HMP without processing a General Plan Amendment. RECOMMENDATION: Motion to: "Approve General Plan Amendment No. 08-010 by approving the draft City Council Resolution (Attachment No. 1) and forward to the City Council for adoption." #B-1 ALTERNATIVE ACTION(S): The Planning Commission may take alternative actions such as: "Continue General Plan Amendment No. 08-010 and direct staff accordingly." PROJECT PROPOSAL.: _General Plan Amendment No. 08-010 represents a request by the City to amend the Environmental Hazards Element of the General Plan to incorporate language identifying the City's adopted Hazard Mitigation Plan(HMP) and requiring its review, maintenance, and update as necessary. The proposed amendment specifically includes: 1. Modifying the Technical Synopsis section to include language identifying the adopted Hazard Mitigation Plan (Attachment 1.4); 2. Establishing an All Hazards section within the Goals, Policies, and Objectives section as well as Goal EH7 and Policy EH 7.1.1 (Attachment 1.5); 3. Insert an additional implementation program (Attachment 1.6); and 4. Amend the Environmental Hazards Implementation Program Matrix by identifying possible State , and Federal funds available for Implementation Program EH-1 (Attachment 1.7). The City of Huntington Beach is currently eligible for up to 75% reimbursement of costs following a natural disaster. Upon adoption of General Plan Amendment No. 08-010, the City will become eligible for an additional 25% reimbursement pursuant to State law. ISSUES: Subiect Property and Surrounding Land Use, Zoning, and General Plan Desiznations: General Plan Amendment No. 08-010 applies Citywide. General Plan Conformance: The proposed General Plan Amendment is consistent with the goals and objectives of the City's General Plan as follows: A. Environmental Hazards Element Objective EH 1.3: Enhance emergency preparedness through community education, effective emergency response and efficient post-disaster recovery. PC Staff Report—07/28/09 -2- (09sr41 GPA 08-010) Policy Elf 1.3.1: Ensure that all citizens have access to information regarding local environmental hazards, emergency preparedness, and emergency response. B. Public Facilities and Public Services Element Obiective PF 2.2: Organize the Fire Department emergency systems so the maximum safety may be provided to the City. The proposed modifications to the existing Environmental Hazards Element would enhance the City's post-disaster recovery by increasing our eligibility for reimbursement. It would comply with the requirements of AB 2140, as well as reflect similar General Plan amendments adopted by oth(:r California jurisdictions by identifying the adopted HMP. The City's HMP was created in conjunction. N,./O adjacent jurisdictions and local school districts to reduce risks and prevent losses from future nawrai :lisasters. Additionally, the request would incorporate reference language only, providing the City an olii.on arty to strengthen hazard mitigation planning and allow future changes to the adopted HMP to occur as necessary without processing a General Plan Amendment. Zoning Compliance: Not applicable. Urban Design Guidelines Conformance: Not applicable. Environmental Status: The request is exempt pursuant to Section 15061(b)(3), which states that a project is exempt from CEQA where it can be seen with certainty that there is no possibility that the activity in question may have a significant effect on the environment. Coastal Status: Not applicable. Redevelopment Status: Not applicable. Design Review Board: Not applicable. Subdivision Committee: Not applicable. Other Departments Concerns and Requirements: The City's Emergency Operations staff has reviewed the proposed amendments to the Environmental Hazards Element and has no comments.No other departments had comments, concerns, or requirements. PC Staff Report—07/28/09 -3- (09sr41 GPA 08-010) Public Notification: Legal notice was published in the Huntington Beach Independent on July 16, 2009, and notices were sent to individuals/organizations requesting notification (Planning Department's Notification Matrix). As of July 21, 2009, staff has not received any correspondence regarding the request. Application Processing Dates: DATE OF COMPLETE APPLICATION: MANDATORY PROCESSING DATE(S): May 21, 2009 Not Applicable ANALYSIS: The primary issue to consider when analyzing this request relates to the findings necessary to approve the request as they pertain to the incorporation of reference language within the current Environmental Hazards Element identifying the local Hazards Mitigation Plan. The request is necessary to accomplish a refinement of the General Plan, and is consistent with other elements of the General Plan. It serves as a mechanism to provide greater public safety. The iD.C.Orporation of the proposed language would comply with the requirements of AB 2140 and would qualify the City of Huntington Beach to receive up to 100% of post-disaster reimbursement costs for eligible projects. The existing HMP was approved in 2004 by the City Council and had been developed in a mutual effort between the cities of Huntington Beach and Fountain Valley, and local school districts. The Environmental Hazards Element and the adopted HMP are complementary documents that facilitate an understanding of potential risks to Huntington Beach residents and property owners. The amendments improve existing emergency systems, emergency preparedness, and post-disaster recovery by increasing the amount of possible funding received by the City following a natural disaster emergency; as -well as provide a stronger policy guideline for analyzing such risks. Upon adoption, the most current HMP will be referenced within the City's General Plan, thereby increasing public awareness of the HMP. The amendments also highlight the City's emergency preparedness, ensuring greater awareness of local environmental hazards. ATTACHMENTS: I. „�; ! . ,J Pla A . d ffie t Ne. 04 010-- SH:HF:RR:HB:lw PC Staff Report—07/28/09 4- (09sr41 GPA 08-010) ATTACHMENT #3 � Environmental Hazards Element Update T General Plan Amendment No. 08-010 September 8, 2009 Request ❑ Amend the Environmental Hazards Element of the General Plan ® Incorporate language identifying the City's adopted Hazard Mitigation Plan (HMP). Y._.' ® Require its review, maintenance, and update as necessary. 1 Background ❑ State law currently requires local general plans to discuss safety hazards. ❑ 2000: Federal Disaster Mitigation Act ■ Requires local governments to adopt comprehensive HMPs in order to receive additional federal funding following a disaster. ❑ 2004: City Council adopted the Huntington Beach/Fountain Valley Hazard Mitigation Plan ■ Developed in collaborative effort between cities of Huntington Beach, Fountain Valley and various school districts. Background 0 2006: CA Assembly Bill 2140 s Directs local governments to incorporate an HMP into the safety element of an adopted general plan. ■ Cities currently limited to 75% post-disaster reimbursement of costs. ❑ AB 2140 qualifies local governments to receive up to 100% reimbursement. -A 2 Analysis o The proposed amendment will : ® Identify the adopted HMP within the Environmental Hazards Element of the General Plan ■ Establish an All Hazards category within the s, Goals, Policies and Objectives section ■ Insert an additional implementation program ■ Amend the Environmental Hazards Implementation Program Matrix Analysis o City of Huntington Beach is currently eligible for up to 75% reimbursement of costs following a natural disaster. o Upon adoption of General Plan Amendment No. 08-010, the City will comply with AB 2140 and become eligible for an additional 25% reimbursement of costs. 3 Analysis ❑ The request is necessary to accomplish a refinement of the General Plan. ❑ The proposed amendments are consistent with other Elements. ❑ Environmental Hazards Element and adopted HMP are complimentary documents. ❑ Project initiated to facilitate greater public safety and emergency preparedness. Planning Commission Action ❑ July 28, 2009 ® Planning Commission approved General Plan Amendment No. 08-010 4 Recommendation o Staff recommends approval of General Plan Amendment No. 08-010 by adopting s the City Council Resolution (Attachment No. 1). 5 RCA ROUTING SHEET INITIATING DEPARTMENT: PLANNING SUBJECT: GENERAL PLAN AMENDMENT No. 08-010 ENVIRONMENTAL HAZARDS ELEMENT UPDATE COUNCIL MEETING DATE: September 8, 2009 RCA;ATTAC H M ENTS STATUS Ordinance (w/exhibits & legislative draft if applicable) Attached ❑ _ Not Applicable Resolution (w/exhibits & legislative draft if applicable) Attached Not Applicable ❑ Tract Map, Location Map and/or other Exhibits Attached ❑ Not Applicable Contract/Agreement (w/exhibits if applicable) Attached ❑ (Signed in full by the City Attorney) Not Applicable Subleases, Third Party Agreements, etc. Attached ❑ (Approved as to form by City Attorney) Not Applicable Certificates of Insurance (Approved by the City Attorney) Attached ❑ Not Applicable Fiscal Impact Statement (Unbudgeted, over $5,000) Attached ❑ Not Applicable Bonds (If applicable) Attached ❑ Not Applicable Staff Report (If applicable) Attached Not Applicable ❑ Commission, Board or Committee Report (If applicable) Attached ❑ Not Applicable Findings/Conditions for Approval and/or Denial Attached ❑ Not Applicable EXPLANATIO _ I,SSI =ATT `C TS FOR REVIEVI/E® RETURNED FOR � DED Administrative Staff ( ) ( ) Deputy City Administrator(Initial) ( ) ) City Administrator (initial) ( ) ( ) City Clerk ( ) EXPLANATION FOR RETURN OF ITEM: - . • RCA Author: SH:MBB:HB CITY COUNCIL/REDEVELOPMENT AGENCY PUBLIC HEARING REQUEST SUBJECT: CAENl aL tto ° 20o% °-Ot8 DEPARTMENT: MEETING DATE: CONTACT: RALOVet,1 SeG►- PHONE: x S 3 t-+ N/A YES NO ( } (y' ( ). Is the notice attached? ` ( ) (v)' ( ) Do the Heading and Closing of Notice reflect City Council(and/or Redevelopment Agency)hearing? Are the date,day and time of the public hearing correct? / If an appeal, is pp the appeicant's name included in the notice? wr ( ) ( ) If Coastal Development Permit,does the notice include appeal language? ( ) ( ) (�}� Is there an Environmental Status to be approved by Council? M ( ) M`- Is a map attached for publication? Is a larger ad required? Size ( ) ( ) ( Is the verification statement attached indicating the source and accuracy of the mailing.list? Are the applicant's name and address part of the mailing labels? Are the appellant's name and address part of the mailing labels? M' ( ) ( } If Coastal Development Permit,is the Coastal Commission part of the mailing labels? If Coastal Development Permit,are the resident labels attached? Is.the Report 33433 attached? (Economic Development Dept. items only) Please complete the following: l. Minimum days.from publication to hearing date 2. Number of times to be published 3. Number of days between publications pJ A 21 NOTICE OF PUBLIC HEARING BEFORE THE CITY COUNCIL OF THE CITY OF HUNTINGTON BEACH NOTICE IS HEREBY GIVEN that on Tuesday, September 8, 2009, at 6:00 p.m. in the City Council Chambers, 2000 Main Street, Huntington Beach, the City Council will hold a public hearing on the following planning and zoning items: ❑ 1. GENERAL PLAN AMENDMENT NO. 08-010 (ENVIRONMENTAL HAZARDS ELEMENT UPDATE): Applicant: City of Huntington Beach Request: To amend the Environmental Hazards Element of the General Plan by incorporating language to identify the city's adopted Hazard Mitigation Plan (HMP) and requiring its review, maintenance, and update as necessary. Location: Citywide Proiect Planner: Hayden Beckman NOTICE IS HEREBY GIVEN that Item #1 is categorically exempt from the provisions of the California Environmental Quality Act. ON FILE: A copy of the proposed request is on file in the Planning Department, 2000 Main Street, Huntington Beach, California 92648, for inspection by the public. A copy of the staff report will be available to interested parties at the City Clerk's Office on Thursday, September 3, 2009. ALL INTERESTED PERSONS are invited to attend said hearing and express opinions or submit evidence for or against the application as outlined above. If you challenge the City Council's action in court, you may be limited to raising only those issues you or someone else raised at the public hearing described in this notice, or in written correspondence delivered to the City at, or prior to, the public hearing. If there are any further questions please call the Planning Department at 536-5271 and refer to the above items. Direct your written communications to the City Clerk. Joan t. Flynn, City Clerk City of Huntington Beach 2000 Main Street, 2nd Floor Huntington Beach, California 92648 (714). 536-5227 GALEGALS\CITY COUNCIL\2009\090908(Environmental Hazards Element Update).DOC Easy Peel®Labels i ♦ ® Bend along line to I ��E��® 5960T"' is Use Avery®Template 51600 Feed Paper expose Pop-Up EdgeTM ; 9 1 President Huntington H or POA 10 Sue Johnson 16 H.B.Chamber of Commerce P.O. Box 791 19671 Quiet ay Lane 19891 Beach Blvd.,Ste_ 140 Sunset Beach,C 90742 Huntington each,CA 92648 Huntington Beach,CA 92648 Dave Stefanides Orange County Assoc_of Realtors 25552 La Paz Road Laguna Hills,CA 92653 President 3 Jeffrey M_Odermaja 12 Pacific�,�`c t aeological 18 Amigos De Boll Chica RUTAN&TUC R,LLP Society _ P.O. Box 1563 611 Anton Blvd_, 4'�Floor P.O_Box 16926 Huntington Bea ,CA 92647 Costa Mesa CA 9 26-1950 Costa Mesa,CA 2627 Attn:Jane Goth d Sunset Beach mmunity Assoc_ 4 Pres.,H_B. Hist Society Director Pat Thies,Pre_ ent C/O Newland House Museum l/ O.C_Ping&Dev.Services Dept PO Box 215 19820 Beach Blvd. P.O_Box 4048 Sunset Beach, 90742-0215 Huntington Beach,CA 92648 Santa Ana,CA 92702-4048 President 6) Community Services DepL (14 J Bryan Speegie Huntington Beach Tomorrow Chairperson O.C_Resources&Develop.Mgt_Dept. PO Box 865 Historical Resources Bd_ P.O. Box 4048 Huntington Beach,CA 92648 Santa Ana,CA 92702-4048 Julie Vandermost 6 Council on Aging 15 Planning Director BIA-OC 1706 Orange Ave. City of Costa Mesa 17744 Sky Park Circle,#170 Huntington Beach, A 92648 P.O_ Box 1200 Irvine CA 92614-4441 Costa Mesa,CA 92628-1200 Richard Spicer Jeff Metzel 16 Planning Director 21 SCAG Seacliff HOA City of Fountain Valley 818 West 7th,12th Floor 19391 Shady Har Circle 10200 Slater Ave. Los Angeles,CA 90017 Huntington Beach, 92648 Fountain Valley,CA 92708 Jean Kimbrell John Roe 16 Planning Director 22 c/o E.T.I.Corral 100 Seacliff HOA City of Newport Beach 20292 Eastwood Cir. 19382 Surfdale e P.O. Box 1768 Huntington Beach,CA 92646 Huntington Bea ,CA 92648 Newport Beach,CA 92663-8915 Dave Guido Lou Mannone 16 Planning Director Environmental Board Chairman Seacliff HOA City of Westminster 21241 Lochlea Lane 19821 Ocean BI ff Circle 8200 Westminster Blvd_ Huntington Beach,CA 92646 Huntington Bea h CA 92648 Westminster,CA 92683 Planning Director 24 Nancy Sebring 31 HB Hamptons CIA 38 City of Seal Beach Ocean View Ele entary School District Progressive Co unity Mgmt. 211 Eight St 17200 Pinehurst ane 27405 Puerta eal,#300 Seal Beach,CA 90740 Huntington Bea CA 92647 Mission Viejo,CA 92691 Etiquettes faciles a peter ; S Repliez a la hachure afin de www.avery.com Se s de Utilisez le gabarit AVERY0 51600 j chamement reveler le rebord Pop-Up"'j 1-800-GO-AVERY i Easy Peel®Labels • ® Bend along line to i Q AVERVO 5960TM" i Use Avery®Template 51600 Feed Paper ® expose Pop-Up EdgeTM J 1 California Co tal Commission 25 Clark Hampton Sally Grah 39 Theresa Henry Westminster School District Meadowl Area South Coast Ai ea Office 14121 Cedarwood Avenue 5161 Gel Circle 200 Oceangate 10th Floor Westminster CA 92683 Huntington each,CA 92649 Long Beach,C 92802-4302 California Coas Commission 25 Stephen Ritter Cheryle Bro Wing 39 South Coast a Office HB Union High School Disrici Meadowlark Area 200 C c gate loth Floor 5832 Bolsa Avenue 16771 Roos velt Lane Long Beach, 92802-4302 Huntington Beach,CA 92649 Huntington ach,CA 92649 Ryan P.Chamberlain Hearthside Homes Caltrans District 12 6 Executive Circle,Suite 250 3337 Michelson Drive,Suite 380 Irvine,CA 92614 Irvine,CA 92612-1699 Director 27 Goldenwest Illege 35 Bolsa Chica Land Trust 41 Local Solid W to Enf.Agy_ Attn:Fred ens 5200 Warner Aveue,Ste. 108 O-C.Health C re Agency 15744 Golde west St Huntington Bea CA 92649 P_O. Box 355 Huntington ach CA 92647 Santa Ana,CA 92702 New Growth rdinator 28 OC County Harbors,Beach 36 Bolsa Chica Land rust 41 Huntington ch Post Office and Parks Dept. Evan Henry,Presi ent 6771 Wamei ve. P.O.Box 4048 1812 Port Tiffin PI e Huntington B ach,CA 92647 Santa Ana,CA 92702-4048 Newport Beach, 92660 Marc Ecker 9 Bella Terra Mall 37 Fountain Valley Elem.School Dist. Attn:Pat Rogers- ude 10055 Slater Avenue 7777 Edinger Av .#300 Fountain Valley CA 92708 Huntington Beac CA 92647 Dr.Gary Rutherford,Super. 30 Country View Etates HOA 38 OC Sanitation Distric 42 HB City Elementary School Dist Came Thomas 10844 Ellis Avenue 20451 Craimer Lane 6642 Trotter Dr ve Fountain Valley CA 2708 Huntington Beach,CA 92648 Huntington Bea4 h CA 92648 David Perry Country View E tates HOA 38 Eric Pendegraft,Plant anager 42 HB City Elementary School Dist. Gerald Chapman AES Huntington Beac ,LLC 20451 Craimer Lane 6742 Shire Circle 21730 Newland Street Huntington Beach,CA 92648 Huntington Beac CA 92648 Huntington Beach CA 2646 Richard Loy 42 Huntington Beaclk Girls Softball* 47 AYSO Region 56 47 9062 Kahului Mrive Mike Erickson Commissioner John Gra Huntington Be tch CA 92646 P.O. Box 3943 9522 Smokey Circle Huntington Bea ,CA 92605-3943 Huntington Beach,CA 9 646 John Ely 42 AYSO Region 117 47 AYSO Region 55 47 22102 Rockpo t Lane John Ahnanza Commissioner Russ Marl w Huntington B ach CA 92646 19961 Bushard S 18111 Brentwell Circle Fountain Valley, A 92708 Huntm on Beach,CA 92 47 Etiquettes facil a peter ; Sens de Repliez A la hachure afro de, www.aver�com , Utilisez le gabarit AVERY®51600 ; char9ement reveler le rebord Pop-UpTm j 1-800-GO-AVERY 1 Huntington Beach Independent has been adjudged a newspaper of general circulation in Huntington Beach and Orange County by Decree of the Superior Court of Orange County,State of California,under date of Aug. 24, 1994,case A50479. PROOF OF PUBLICATION NOTICE cc BEFORE THE CITY COUNCIL OF THE CITY OF HUNTINGTON BEACH STATE OF CALIFORNIA ) NOTICE IS HEREBY GIV- EN that on-Tuesday, I September 8, 2009, at SS. i 6:00 p:m. ;in, the City 'Council Chambers; 2000 COUNTY OF ORANGE ) 1 Main'Street,,Huntington dJ 1 1\<D i Beach, the City Council will hold a public hear- ing on the following planning and, zoning am the Citizen of the United States and a ;items: . iQ . GENERAL PLAN resident of the County aforesaid; I am over +AMENDMENT NO. 08- 410 (ENVIRONMENTAL' the age of eighteen years, and not a party ;HAZARDS ELEMENT UP- DATE): Applicant: City to or interested in the below entitled matter. ;of'Huntington,Beach Re- �quest: To amend the am a principal clerk of the HUNTINGTON Environmental Hazards 1 Element of the General BEACH INDEPENDENT, a newspaper of Plan by incorporating language-to identify the general circulation, printed and published in city's .adopted Hazard I Mitigatiom Plan (HMP) j the City of Huntington Beach, County of !and requiring its review,. !maintenance, and up- Orange, State of California, and the ;date as necessary.Loca- • tion: Citywide Protiect attached Notice is a true and complete copy Planner:' Hayden Beckman as was printed and published on the NOTICE IS HEREBY GIV- te- EN date(s): gN that Item m t from oricall exempt from the provisions of the California Environmental Quality Act. SON FILE;A copy of the ' proposed-.request is on ., file in the Planning De- partment, 2000 Main ,Street, Huntington j Beach, California 92648, ' ,for inspection by the 'public:. A copy,of'the August 20, 2009 ;staff- report will be .available to interested,: ,parties at the City I Clerk's Office on Thursday, September 3; 2009. ALL INTERESTED.PER- �SONS are'invited'to at- tend said hearing' and express opinions'or sub- mit' evidence for.'or against:the application declare> under penalty of perjury, that the as outlined above.If you ,challenge the City-Coun- foregoing is true and correct. Ima action it;d to you 'may be limited to rais- Ong :only .those issues you 'or someone else 'raised at the public hearing described in this notor- Executed on August 20 2009 respo cle in written red � respondence ' delivered, at Costa Mesa California :to the city at, or prior to,the public hearing.If there are any further, w questions please call the Planning Department at i'536-5271.and refer 'to the above items. Direct your written communi- cations to:.the City Signature Clerk. Joan L.Flynn,City Clerk City of Huntington Beach 2000 Main Street, 2nd Floor Huntington Beach, California 92648 (714)536-5227 Published Huntington ;Beach Independent Au- gust 20,2009 084-753_, Exhibit"A" Resolution No.2009-49 EXHIBIT A HAZARDS CHAPTER ENVIRONMENTAL HAZARDS ELEMENT STATUTORY REQUIREMENTS Government Code Section 65302(g)states the following: "The General Plan shall include a safety element for the protection of the community from any unreasonable risks associated with the effects of seismically induced surface rupture, ground shaking, ground failure, tsunami. seiche, and dam failure; slope stability leading to mudslides and landslides; subsidence and other geologic hazards known to the legislative body;flooding, and wild land and urban fires." This Element addresses flooding as it pertains to geologic, seismic and soils hazards. This Environmental Hazards Element and the referenced materials together satisfy the geologic and seismic portion of the Section 65302(g)requirement. TECHNICAL. SYNOPSIS This Element of the General Plan is the first step in a comprehensive update to be completed for the geologic and seismic safety issues. This Element, when used in conjunction with Appendix A, the 1974 City of Huntington Beach Seismic Safety Element (the operative document on file with the California Department of Conservation Division of Mines and Geology), and the referenced materials, serves as an adequate basis for a geologic and seismic safety review. A regional perspective is provided to establish the geologic/seismic context for the City. Figures EH-1 through EH-11 are used to summarize the types and level of geologic/seismic hazards present in the City. Most of the geologic and seismic hazards that have the potential to impact the City are due to the active Newport-Inglewood fault, the shallow water table, and the relatively loose nature of recent sedimentary deposits. Individually, or in combination, these factors may generate surface fault rupture, severe ground shaking, subsidence,methane,and other relatively minor hazards. Each of these hazards has been identified and described in the following sections: Surface Geology, Liquefaction, Tsunami and Seiche, Subsidence, Methane,Flooding,and Other Minor Geologic and Soil Engineering Hazards.A Local Hazards Mitigation Plan has been prepared in conjunction with adjacent jurisdictions and local school districts to mitigate risks from natural disasters and is referenced in this element. A. SURFACE GEOLOGY The City of Huntington Beach lies on a coastal plain above recently deposited sediment. The sediment is deposited on top of older bedrock formations buried thousands of feet below the surface. These recent sedimentary deposits originally accumulated in beach, river, bay, and estuary environments at or near sea level. However, due to ongoing seismic uplift and folding, these deposits now form mesas at higher elevations. Subsequent erosion from wave action has produced coastal bluffs exposing these deposits. THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-I Exhibit"A" Resolution No.2009-49 HAZARDS CHAPTER Environmental Hazards Element Policy comprehensive mapping of flooding EH 6.2.1 potential hazard areas in the City; Establish standards of construction within identified peat zones. (I-EH 4) comprehensive mapping of groundwater potential hazard areas in the City; Objective comprehensive mapping of peat EH 6.3 potential hazard areas in the City; Increase public awareness about the location and hazards of peat conditions. (I-EH 8) challenges to flood zone boundaries that appear to be unreasonable or incorrect; Policy a Local Drainage Master Plan assessing EH 6.3.1 improvements necessary to achieve Provide information to the public regarding peat 100-year capacity for the local flood condition areas and proper construction methods and control system; standards. (I-EH 8) All Hazards (foal EH 7 Ensure the safety of the public, to the greatest extent feasible, from the impacts DRAF of a natural disaster. Pol lice EH 7.1.1 Maintain and update as necessary the current Local Hazards Mitigation Plan (LHMP) as part of the Environmental Hazards Element. The LUMP includes resources and information to help reduce risks and prevent losses from future natural disasters. (I-EH I) IMPLEMENTATION PROGRAMS I-Ell 1 Studies/Mapping/Master Plans a. Conduct, prepare and/or update the following as funding permits: • comprehensive mapping of seismic/geologic hazard areas in the City, including fault locations, unstable soils and slope locations, areas of high liquefaction potential, areas of high seiche potential and locations of shallow water table depth; • maps of potential bluff erosion areas; • maps of existing methane seepage areas; • methane level monitoring on an on-going basis; THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-28 HAZARDS CHAPTER Exhibit"A" Resolution No.2009-49 T Environmental Hazards Element J • an assessment of potential damage to b. Continue to: essential utility and transportation evaluate methane sources, locations and infrastructure and public service concentrations on a site-specific basis facilities due to geologic/seismic and will include any previously hazards. The findings of the assessment unidentified methane areas in the should be utilized in the review of Methane Overlay District; proposed development projects, and used for maintaining and updating assume the lead role in mitigating emergency preparedness plans;` methane hazards in public rights-of-way • standards for tsunami/seiche studies to and on public property; be completed for harbor areas, supplement beach sand with sand from breakwaters, and coastal areas of outside sources;and concern. The City shall update its work with property owners to maintain evaluation of the tsunami hazard, make safe conditions on their property. its standards more specific, and disseminate available information on C. Use the EHE and the data from items a)and tsunami warnings and on procedural b) above to prepare and submit a formal s update of the seismic safety components of steps to prepare the populous for such an event. Mitigation measures shall be the Safety Element requirement. suggested for new construction;47 d. The City's EOC will maintain, review and • determine the safety status of all dams update, as necessary, the current Local which may fail and cause inundation Hazards Mitigation Plan. within the City. This shall be done in cooperation with the County of Orange I-EH 2 and the State Division of Safety of Dams Interagency Participation and Coordination in order to establish the safety status and a. The Emergency Operations Center(EOC) will to determine what follow up analyses, if coordinate with the Departments of Police, any,are needed. Based on these results, Fire, Public Works, Community Development, the City shall develop risk guidelines Community Services and other departments in and to allow evaluation of current preparing and maintaining earthquake and regulatory measures for protection of other emergency response plans. future development;" b. The City will provide the EOC with maps of • operational strategies for the City's seismic/geologic hazard areas in the City, portion of the local flood control system including fault locations, areas of high intended to maximize system efficiency liquefaction potential and areas of seiche and minimize system overload during hazard. periods of heavy rainfall;and c. The City will work with and coordinate its • a hazardous waste sites map within the earthquake and other emergency response plans City. with each school district as the school districts prepare earthquake education programs and develop their own earthquake and other emergency response plans. d. The EOC will coordinate with the Building Division and the Department of Public Works to establish standards for the design and operation of public safety facilities which will ensure that they remain safe and functional 46 during and after disasters. Mitigation Measure GS-24 as specified in EIR No.94-1,Table EX-1 47 Mitigation Measure SD-5 as specified in EIR No.94-1,Table EX-1 41 Mitigation Measure SD-6 as specified in EIR No.94-1,Table 49 Mitigation Measure GS-21 as specified in EIR No.94-1,Table EX-1 EX-1 THE CITY OF HUNTINGTON BEACH GENERAL PLAN V-EH-30 "A" DRAFT ADMINISTRATION (D c c - 5 E > a� m r c : E : - - a�i - E n aci m m E a, m aa' - E a) as c w Q E g a, U 0 C N a) i N f— - LL r Z a U in k o E 2 —0 E E O o Z' a) o E V o N o > 12 c m o c o c a) o aD a) c a`> ' a) E E o a as ' t c > o as t o O O U O U O W N - (D a) @ N No. Name CITY OF HUNTINGTON BEACH CITY OF HUNTINGTON BEACH PROGRAM RESPONSIBLE AGENCY FUNDING SOURCE SCHFDULE EH-1 Studies/Mapping/Master Plans • • • • • • ' Ongoing EH-2 Interagency Participation and Coordination • • • • • • • O„gc;ng° -. - .. EH-3 Alquist-Priolo Earthquake Fault Zone • • Ongoing' EH-4 Development Review or Environmental Review Process • ® • • : ® Ongoing EH-5 Ordinances ® ' • • • Ongoing _ .... EH-6 Unsafe Structures Retrofitting or Demolition • • • Ongoing° - .........._.... EH-7 Groundwater Mitigations • • Ongoing -- EH-8 Public Education ® ® • • • Ongoing ----- EH-9 Staff Training • • ® • • • • • • Ongoing --.---__. __._. EH-10 Disaster Recovery Committee • • • • • • Ongoing ---- ......_- EH-1 1 Abandoned Oil Well Re-evaluation • • • : Ongoing ..........- EH.1 Methane Gas Testing Standards and Requirements • • • . • , Ongoing --- ----- EH-13 Emergency Contingency Plans e • • • • • Ongoing EH-14 Flood Insurance Programs P • • • • 'yea upon EI 1 15 —-FEMA Development Standards Plan adoption• • - Ongoing' -------------- L._._._. . {.__....._._ ___.._...... EH-1 E Santa Ana River Main Stem Funding • • • • Ongoing .. -. ...__.... . _............ EH-17 Local Tsunami Warnings Wire System • • Ongoing *As funding permits ENVIRONMENTAL HAZARDS x IMPLEMENTATION PROGRAM MATRIX CITY OF HUNTINGTON BEACH GENERAL PLAN E H