IV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY/SOILS
|
|
- Mervyn Long
- 6 years ago
- Views:
Transcription
1 IV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY/SOILS Except where otherwise noted, the following Section is based on the Preliminary Geotechnical Investigation, Proposed Medical Office Buildings and Mixed-Use Development, Olympic Boulevard and 1901 to 1933 Bundy Drive, Los Angeles, California (the Preliminary Geotechnical Investigation ) prepared by Geotechnologies, Inc., dated February 7, In addition, this Section is also based on a more recent report entitled Geotechnical Engineering Investigation, Proposed Medical Park Olympic Boulevard and 1901 to 1903 Bundy Drive, Los Angeles, California (the Geotechnical Investigation ). A copy of both reports can be found as Appendix D to this Draft EIR. ENVIRONMENTAL SETTING Geologic Conditions and Topography The project site is located in the extreme southern end of the Transverse Ranges Geomorphic Province, characterized by roughly east-west trending mountains with northern and southern boundaries formed by faults. Within the Transverse Ranges, the project site is located in the Los Angeles Basin, which is generally located at the northern end of the Peninsular Ranges Geomorphic Province. The basin is bounded to the east and southeast by the Santa Ana Mountains and San Joaquin Hills, and to the northwest by the Santa Monica Mountains. Previous reports observed the project site s topographic elevation to be approximately 162 feet above mean sea level (msl) with a slight south southwesterly slope. 1 The United States Geological Survey (USGS) topographic quadrangle for the region shows the project site elevation sloping southwest from approximately 160 to 155 feet above mean sea level (msl). 2 The nearest open body of water to the project site is the Pacific Ocean, which is located approximately 2.5 miles west of the project site. Soil Conditions As part of the Preliminary Geotechnical Investigation, two exploratory borings were drilled at the project site to a depth of 30 and 50 feet, respectively. Results of these borings show that, up to a depth of 1.0 to 1.5 feet below ground surface (bgs), the project site is underlain by fill materials including clayey silt and clayey sand which are brown to dark brown; moist; medium dense to medium stiff; fine grained; and contain occasional gravel. Beneath the fill materials are native soils consisting of silt, clay, and sand, ranging from light gray to brown, moist to wet, medium dense to very dense, and containing varying 1 2 Environmental Resources Management, Phase I Environmental Site Assessment, Westside Medical Park, 1901, 1925, 1933 South Bundy Drive, Los Angeles, California, September United States Department of the Interior, United States Geological Survey, Beverly Hills Quadrangle, California-Los Angeles Co, 7.5 Minute Series (Topographic), Page IV.E-1
2 amounts of gravel. These native soils are underlain by younger alluvial materials. Similar soil conditions were discovered during exploration conducted as part of previous Phase II subsurface investigations which involved drilling up to approximately 40 feet bgs (see Section IV.F, Hazards and Hazardous Materials, and Appendix E to this Draft EIR). These previous borings also showed the project site to be underlain by alternating layers of silty to clayey sands and sands with gravel to a depth of approximately 35 to 40 feet bgs, at which depth a confining layer of clayey silt was encountered. 3 These soils are underlain by marine and non-marine terrace deposits of the Lakewood Formation. 4 Groundwater and Stormwater During the exploratory borings conducted as part of the Preliminary Geotechnical Investigation, groundwater was encountered at a maximum depth of approximately 37 feet bgs. This is consistent with previous borings conducted at the project site, which encountered groundwater at depths ranging between approximately 33 and 44 feet bgs. 5,6 Based on mapping provided by the U.S. Geological Survey, the historical high groundwater level in the project area is between 30 and 40 feet bgs. 7 The project site is almost entirely covered with impermeable surfaces. Storm water from the project site is gravity-fed via a man-made engineered slope which drains towards the south, where stormwater enters catch basins within a paved surface parking lot and is directed to off-site City of Los Angeles municipal storm drains in Bundy Drive. 8 Seismic Hazards The entire Southern California area is considered to be a seismically active region. The region has numerous active, potentially active, and inactive faults. According to California Division of Mines and Environmental Resources Management, Phase II Site Investigation Report, Westside Medical Park, West Los Angeles, California, September 9, Environmental Resources Management, Phase I Environmental Site Assessment, Westside Medical Park, 1901, 1925, 1933 South Bundy Drive, Los Angeles, California, September Ibid. Environmental Resources Management, Phase II Site Investigation Report, Westside Medical Park, West Los Angeles, California, September 9, U.S. Geological Survey, Historical Highest Ground Water Contours and Borehole Log Data Locations, Beverly Hills Quadrangle, 30 x 60 minute series, Environmental Resources Management, Phase II Site Investigation Report, Westside Medical Park, West Los Angeles, California, September 9, Page IV.E-2
3 Geology, now known as California Geologic Survey (CGS), an active fault is defined as a fault that has had a surface displacement within Holocene times (about the last 11,000 years). A potentially active fault is a fault that has demonstrated surface displacement of Quaternary age deposits (within the last 1.6 million years). Buried thrust faults are faults without a surface expression but are a significant source of seismic activity. Due to the buried nature of these thrust faults, there existence is usually not known until they produce an earthquake. However, the seismic risk of these buried faults is believed to be low. According to the City of Los Angeles Safety Element, the project site is not located within an Alquist- Priolo Special Study Zone Area or Fault Rupture Study Area. However, the project site is located immediately adjacent to an identified Fault Rupture Study Area located east of Bundy Drive and south of Olympic Boulevard. 9 According to the Geotechnical Investigation the South Branch of the Santa Monica Fault underlies the project site near Olympic Boulevard and may underlie the project site near Building D. While some geologists consider the Santa Monica Fault to be active, it has not been designated as an active fault by the State of California. Surface Fault Rupture Ground rupture is defined as surface displacement which occurs along the surface trace of the causative fault during an earthquake. According to the Geotechnical Investigation, no known active or potentially active faults underlie the project site. In addition, the project site is not located within an active Alquist- Priolo Earthquake Fault Zone. Therefore, the potential for surface ground rupture at the project site is considered to be low. Ground Shaking The Preliminary Geotechnical Investigation included modeling to determine the potential for seismicrelated ground motion at the project site. The deterministic model showed that the largest estimated earthquake acceleration experienced at the project site would be a magnitude 6.6 event along the Santa Monica Fault. Ground Failure and Liquefaction Liquefaction is a process by which water-saturated unconsolidated sediments lose their strength due to increased pore pressure during or after an earthquake. Liquefaction potential is greatest where the groundwater level is shallow, and loose, fine sands occur within a depth of about 50 feet. Liquefaction potential decreases as grain size and clay and gravel content increase. Liquefaction potential increases as ground acceleration and shaking increases during earthquakes. According to the City of Los Angeles 9 City of Los Angeles, Safety Element of the General Plan, Exhibit A: Alquist-Priolo Special Study Zones & Fault Rupture Study Areas in the City of Los Angeles, March Page IV.E-3
4 Safety Element, the project site is not located within a liquefaction hazard area. 10 However, CGS shows approximately the southern half of the project site within a liquefaction area. 11 Based on this designation and because the historic high groundwater level at the project site is approximately 30 feet below grade, a liquefaction analysis was conducted as part of the Geotechnical Investigation. This analysis showed that soils underlying the project site would not be considered prone to liquefaction during the ground motion expected during the design based earthquake. Earthquake-induced volumetric strain and dissipation of pore pressure in saturated silts and sands after liquefaction can result in settlement. Soil settlement is most likely after a major earthquake when a site is underlain by dry, loose, sandy soils. The Geotechnical Investigation concluded that the medium dense to very dense clay, silt, and sand underlying the project site would not be considered prone to dynamic settlement. Soil Stability (Landslide, Spreading, Subsidence, Liquefaction, or Collapse) Landslides may occur when a site is located on or in the vicinity of hillside areas. Similarly, free-faces or slopes generally contribute to lateral spreading. The project site is not mapped by the City of Los Angeles as within a Landslide Inventory or Hillside Area. 12 The USGS shows the project site elevation sloping southwest from approximately 160 to 155 feet above msl. 13 This is confirmed by visual observation of the project site which shows it to be generally flat and, furthermore, not located in the vicinity of any hills or slopes. Subsidence is a localized mass movement that involves the gradual downward settling or sinking of the ground, resulting from the extraction of mineral resources, subsurface oil, groundwater, or other subsurface liquids, such as natural gas. The project site is not located within a City-designated oil field or oil drilling area, or a City-designated Mineral Resource Zone 2 Area (MRZ-2). 14 Furthermore, research shows that the project site was primarily used for agriculture from as early as 1902 through the late City of Los Angeles Department of City Planning, Safety Element of the General Plan, Exhibit B: Areas Susceptible to Liquefaction in the City of Los Angeles, State of California, Division of Mines and Geology, Seismic Hazard Zone Map, Beverly Hills Quadrangle, (See Geotechnical Investigation provided as Appendix D to this Draft EIR.) City of Los Angeles Department of City Planning, Safety Element of the General Plan, Exhibit C: Landslide Inventory and Hillside Areas in the City of Los Angeles, June United States Department of the Interior, United States Geological Survey, Beverly Hills Quadrangle, California-Los Angeles Co, 7.5 Minute Series (Topographic), City of Los Angeles Department of City Planning, Safety Element of the General Plan, Exhibit E: Oil Fields and Oil Drilling Areas in the City of Los Angeles, May Page IV.E-4
5 1940s/early 1950s when the existing on-site manufacturing and office structures were constructed. The project site is not known to have been used historically for extraction of mineral resources, subsurface oil, groundwater, natural gas, or other subsurface liquids. 15,16 The nearest open body of water to the project site is the Pacific Ocean, which is located approximately 2.5 miles west of the project site. Liquefaction is most likely after a major earthquake when the groundwater level is shallow and loose, fine sands occur at a site. As discussed previously, the project site is not identified by the City to be located within a liquefaction hazard area. 17 However, the State has indicated that approximately half of the project site is within a liquefaction area. 18 Nonetheless, the liquefaction analysis conducted for the project site showed that soils underlying the project site would not be considered prone to liquefaction. Collapse of structures could occur if a proposed development were not constructed in accordance with local and State building standards, as well as other site-specific recommendations. Applicable building requirements include the 2001 California Building Code with City of Los Angeles Amendments, the City s Planning and Zoning Code (Chapter I of the Los Angeles Municipal Code), as well as site-specific recommendations of the City s Department of Building and Safety. Conditions affecting the stability of a proposed development may include the proposed depth of excavation, nature of soils underlying a proposed development site, and proximity of adjacent structures. Expansive Soils Soils in the project area consist of sandy loams and loamy sands, which have a low to moderate expansion hazard potential. The Geotechnical Investigation included an analysis of soils at the project site which showed soils to be in the very low to low expansion range Environmental Resources Management, Phase I Environmental Site Assessment, Westside Medical Park, 1901, 1925, 1933 South Bundy Drive, Los Angeles, California, September 2004; Glenfos, Inc., Preliminary Site Assessment Report, West Olympic Boulevard and 1901, 1925 & 1933 Bundy Drive, AGI Properties, Inc., Los Angeles, CA 90064, June 26, (See Appendix E to this Draft EIR.) Christopher A. Joseph & Associates, Historic Report, December (See Appendix B to this Draft EIR.) City of Los Angeles Department of City Planning, Safety Element of the General Plan, Exhibit B: Areas Susceptible to Liquefaction in the City of Los Angeles, State of California, Division of Mines and Geology, Seismic Hazard Zone Map, Beverly Hills Quadrangle, (See Geotechnical Investigation in Appendix D.) Page IV.E-5
6 ENVIRONMENTAL IMPACTS Thresholds of Significance In accordance with Appendix G to the State CEQA Guidelines, a project would have a significant effect if it would: (a) Expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving: i) Rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo Earthquake Fault Zoning Map or based on other substantial evidence of a known fault? ii) Strong seismic ground shaking? iii) Seismic-related ground failure, including liquefaction? iv) Landslides? (b) Result in substantial soil erosion or the loss of topsoil? (c) Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on- or off-site landslide, lateral spreading, subsidence, liquefaction, or collapse? (d) Be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994), creating substantial risks to life or property? (e) Have soils incapable of adequately supporting the use of septic tanks or alternative waste water disposal systems where sewers are not available for the disposal of waste water? As discussed in Section IV.A (Impacts Less Than Significant) of this Draft EIR, the proposed project would have no impact with respect to Thresholds (a)(iv), (b), and (e) listed above. As such, no further analysis of these topics is required. Based on the City of Los Angeles L.A. CEQA Thresholds Guide, the proposed project would also result in a significant geotechnical impact if it exceeds any of the following thresholds: (a) It would cause or accelerate geologic hazards which would result in substantial damage to structures or infrastructure, or expose people to substantial risk of injury; (b) It would constitute a geologic hazard to other properties by causing or accelerating instability from erosion; Page IV.E-6
7 (c) It would accelerate natural processes of wind and water erosion and sedimentation, resulting in sediment runoff or deposition which would not be contained or controlled on-site; or (d) One or more distinct and prominent geologic or topographic features would be destroyed, permanently covered or materially and adversely modified. Such features may include, but are not limited to, hilltops, ridges, hillslopes, canyons, ravines, rock outcrops, water bodies, streambeds and wetlands. As the proposed project was determined to have no soil erosion and loss of topsoil impact under Threshold (b) from Appendix G to the State CEQA Guidelines (see Section IV.A of this Draft EIR), the proposed project would likewise have no erosion impacts with respect to Thresholds (b) and (c), above, from the L.A. CEQA Thresholds Guide. As discussed in Section IV.A, the project site does not contain any geologic resources such as rock outcroppings. Furthermore, and as described in the Environmental Setting of this Section, the project site does not contain and is not nearby any hilltops, ridges, hillslopes, canyons, ravines, water bodies, streambeds or wetlands. As such, the proposed project would have no impact with respect to Threshold (d), above. Geologic hazards (i.e., Threshold (a), above) are discussed throughout the Project Impacts discussion on the following pages. Project Impacts Seismic Hazards Surface Fault Rupture The project site is located in the seismically active region of Southern California. Numerous active and potentially active faults with surface expressions (fault traces) have been mapped adjacent to, within, and beneath the City of Los Angeles. As discussed previously in this Section, the project site is not located within an Alquist-Priolo Special Study Zone Area or Fault Rupture Study Area. The South Branch of the Santa Monica Fault underlies the project site near proposed Building D; however, this fault is not considered to be active by the State of California. Moreover, the proposed project would comply with local and State regulations regarding seismic design, including the CGS Special Publications 117, Guidelines for Evaluating and Mitigating Seismic Hazards in California (1997), which provides guidance for the evaluation and mitigation of earthquake-related hazards. Therefore, as the potential for surface fault rupture at the project site is remote and the proposed project would be constructed in accordance with standard seismic requirements, the proposed project would result in a less-than-significant impact with respect to exposure of people or property to hazardous conditions resulting from rupture of a known earthquake fault. Ground Shaking The principal seismic hazard to the proposed project is strong ground shaking from earthquakes produced by local faults. Modern, well-constructed buildings are designed to resist ground shaking through the use Page IV.E-7
8 of shear walls and reinforcements. The proposed construction would be consistent with all applicable provisions of the City of Los Angeles Building Code, as well as the seismic design criteria contained within the Uniform Building Code. Although the project site is located within approximately 2.1 miles of the active Santa Monica Fault, and is within 60 miles of several other active faults on a regional level, the potential seismic hazard to the proposed project site would not be higher than in most areas of the City of Los Angeles or elsewhere in the region. Therefore, as the proposed project would be constructed in accordance with standard seismic requirements, the proposed project would result in a less-thansignificant impact with respect to exposure of people or property to hazardous conditions resulting from strong seismic ground shaking. Ground Failure and Liquefaction As discussed previously in this Section, the project site is not located within an area prone to liquefaction. Furthermore, an analysis of soils at the project site showed that these soils would not be prone to liquefaction. Therefore, the proposed project would result in a less-than-significant impact with respect to exposure of people or property to hazardous conditions resulting from liquefaction during a seismic event. The Geotechnical Investigation concluded that the medium dense to very dense clay, silt, and sand at the project site would not be considered prone to dynamic settlement during an earthquake. Therefore, the proposed project would result in a less-than-significant impact with respect to exposure of people or property to hazardous conditions resulting from dynamic settlement during a seismic event. Soil Stability (Landslide, Spreading, Subsidence, Liquefaction, or Collapse) With respect to landslides, the topography at the project site is relatively flat and the site is not located near any foothills or mountains. Therefore, the possibility of landslides occurring on the project site is minimal. Since the project site does not contain free-faces or slopes, the potential for lateral spreading to occur is low. As the project site is not known to have been used for extraction of mineral resources, subsurface oil, groundwater, natural gas, or other subsurface liquids, there is low potential for subsidence at the project site. As stated previously, an analysis of soils at the project site showed that these soils would not be prone to liquefaction. Therefore, the proposed project would not result in a significant soil stability impact with respect to any of the following: landslides, lateral spreading, subsidence, or liquefaction. With respect to collapse, based on the explorations, laboratory testing, and research conducted, the Geotechnical Investigation concluded that the proposed project would be feasible from a geotechnical standpoint. However, several conditions present at the project site may influence the proposed construction, such as the presence of fill materials from 1.0 to 1.5 feet bgs that would need to be removed prior to new construction, and the proposed depth of excavation (i.e., approximately 15 feet in vertical height), nature of on-site soils, and proximity of adjacent structures that may demand shoring measures in the proposed excavations. As such, prior to mitigation, the proposed project could result in a potentially significant soil stability impact related to collapse. Page IV.E-8
9 The proposed project would be required to be constructed in accordance with City of Los Angeles building regulations including the 2001 California Building Code with City of Los Angeles Amendments, the City s Planning and Zoning Code (Chapter I of the Los Angeles Municipal Code), as well any sitespecific recommendations of the City s Department of Building and Safety. In addition, to ensure the stability and safety of the proposed development, the Geotechnical Investigation (see Appendix D to this Draft EIR) includes site-specific construction recommendations including, but not limited to, those pertaining to: soil compaction requirements, reuse of soil and use of import materials, construction of retaining walls, disposal of stormwater, allowable bearing values, allowable friction coefficients, concrete slab design, shoring and lagging measures, and monitoring by a competent professional. Conformance with standard City building requirements along with the implementation of all recommendations set forth in the Geotechnical Investigation for the proposed project, as re-stated in the mitigation measures identified in this Section, would ensure that any project impacts related to collapse would be reduced to a less-than-significant level. Expansive Soils The Geotechnical Investigation included an analysis of soils at the project site, which were shown to be in the very low to low expansion range. The Geotechnical Investigation concluded that conformance with the minimum City of Los Angeles reinforcement requirements for foundations and slabs would adequately address this level of expansiveness. As such, impacts associated with expansive soils would be less than significant. CUMULATIVE IMPACTS Construction of the identified related projects and other future development may introduce new sitespecific hazards to the project area including those related to seismic events (e.g., surface fault rupture, ground-shaking, liquefaction, landslides) as well as soil conditions (e.g., erosion, expansiveness, subsidence, lateral spreading, collapse). Such impacts would be directly related to the conditions present at each individual related project site and the specific characteristics of each related project. Therefore, impacts would not generally combine between related projects nor combine with impacts of the proposed project. Furthermore, like the proposed project, the development of each of the related projects would be subject to uniform City and State construction standards designed to protect public safety as well as structures. Therefore, the proposed project would not combine with the related projects to create a cumulative impact to geology or soils and cumulative impacts would be less than significant. MITIGATION MEASURES The following mitigation measures are recommended to address the proposed project s geology and soils impacts with respect to soil stability: (E-1) Construction of the proposed project shall comply with recommendations set forth in the Preliminary Geotechnical Investigation, Proposed Medical Office Buildings and Mixed-Use Page IV.E-9
10 Development, Olympic Boulevard and 1901 to 1933 Bundy Drive, Los Angeles, California prepared by Geotechnologies, Inc., dated February 7, 2007 and the Geotechnical Engineering Investigation, Proposed Medical Park Olympic Boulevard and 1901 to 1933 Bundy Drive, Los Angeles, California prepared by Geotechnologies, Inc., dated May 23, 2008 (see also Appendix D to this Draft EIR) to the extent feasible. LEVEL OF SIGNIFICANCE AFTER MITIGATION The proposed project s impacts associated with geology and soils (soil instability) would be less than significant with the implementation of the mitigation measures listed above. The proposed project would not result in substantial adverse effects related to seismic hazards or expansive soils and, therefore, would have less-than-significant impacts. Page IV.E-10
IV. ENVIRONMENTAL IMPACT ANALYSIS G. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS G. GEOLOGY AND SOILS The following section is a summary of the geotechnical report conducted for the proposed project. The Report of Geotechnical Investigation Proposed
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY AND SOILS The following section is a summary of the geotechnical report conducted for the Proposed Project. The Geotechnical Engineering Investigation (the
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY AND SOILS The following analysis is based on the Geotechnical Investigation Report, Proposed Mid-Rise Multi- Family Residential Development Project Wetherly
More informationGEOLOGY AND SOILS. This chapter summarizes geologic and geotechnical aspects of the site as they relate to the Project.
9 GEOLOGY AND SOILS INTRODUCTION This chapter summarizes geologic and geotechnical aspects of the site as they relate to the Project. This chapter utilizes information from the following reports prepared
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY AND SOILS INTRODUCTION This section evaluates potential impacts related to geology, including seismicity, and soils associated with development of the proposed
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY/SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY/SOILS The following discussion is based upon information contained in the Hollywood Redevelopment Plan Amendment EIR and a letter prepared by Geotechnologies,
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS C. GEOLOGY/SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS C. GEOLOGY/SOILS The following section is a summary of the preliminary geotechnical consultation conducted for the Proposed Project. The Report of Geotechnical Engineering
More informationIV. Environmental Impact Analysis D. Geology
IV. Environmental Impact Analysis D. Geology 1. Introduction This section evaluates potential geologic hazards and soil conditions associated with the proposed project, including fault rupture, ground
More informationGEOLOGY, SOILS, AND SEISMICITY
4.9 GEOLOGY, SOILS, AND SEISMICITY 4.9.1 Introduction Information about the geological conditions and seismic hazards in the study area was summarized in the FEIR, and was based on the Geotechnical Exploration
More informationImpact : Changes to Existing Topography (Less than Significant)
4.2 Land Resources 4.2.1 Alternative A Proposed Action Impact 4.2.1-1: Changes to Existing Topography (Less than Significant) Development of the project site would involve grading and other earthwork as
More information9. GEOLOGY, SOILS, AND MINERALS
June 28, 2018 Page 9-1 9. GEOLOGY, SOILS, AND MINERALS This EIR chapter describes the existing geological, soil, and mineral conditions in the planning area. The chapter includes the regulatory framework
More informationSetting MOUNTAIN HOUSE NEIGHBORHOODS I AND J INITIAL STUDY 5. ENVIRONMENTAL CHECKLIST 6. GEOLOGY AND SOILS. Issue
Issue Less Than Significant or No Impact Potential Significant Impact Adequately Addressed in MEIR MEIR Required Additional Review: No Significant Impact Less Than Significant Impact Due to Mitigation
More information5.11 Geology and Soils
5.11 Geology and Soils 5.11 GEOLOGY AND SOILS This section evaluates the geologic and seismic conditions within the City of Azusa and evaluates the potential for geologic hazard impacts associated with
More information3E. Geology and Soils
INTRODUCTION The purpose of this chapter is to evaluate the proposed project s impacts on local geological features and whether it would expose people or structures to adverse geological impacts. Potential
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS G. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS G. GEOLOGY AND SOILS INTRODUCTION The information and analysis in this section is based primarily on the following report, which is included in Appendix IV.G of this EIR:
More informationIV. Environmental Impact Analysis D. Geology and Soils
IV. Environmental Impact Analysis D. Geology and Soils 1. Introduction This section evaluates geologic and soils hazards that could potentially result due to implementation of the proposed project. Geologic
More information3.4 GEOLOGY AND SOILS Environmental Setting
3.4 GEOLOGY AND SOILS This section discusses the existing geologic and soils conditions and evaluates the potential impacts related to geology and soils as a result of the proposed project. This section
More information4.5 GEOLOGY AND SOILS
4.5 GEOLOGY AND SOILS This section addresses the project site geology and soils and analyzes potential changes that would result from development of the Wye Specific Plan project. 4.5.1 Environmental Setting
More information4.5 GEOLOGY AND SEISMICITY
4.5 GEOLOGY AND SEISMICITY INTRODUCTION This section identifies the potential for geologic and seismic hazards to occur on or near the proposed project site. Issues of concern include suitability of soil
More information5. Environmental Analysis
5.3 GEOLOGY AND SOILS The potential geology and soils impacts associated with development within The Platinum Triangle have been fully analyzed in two previous EIRs, including: Anaheim Stadium Area Master
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY/SEISMIC HAZARDS
IV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY/SEISMIC HAZARDS 1. ENVIRONMENTAL SETTING The following analysis of geology and seismic hazards for the Middle School Project is based on the Report of Geotechnical
More informationConverse Consultants Geotechnical Engineering, Environmental & Groundwater Science, Inspection & Testing Services
Converse Consultants Geotechnical Engineering, Environmental & Groundwater Science, Inspection & Testing Services Ms. Rebecca Mitchell Mt. San Antonio College Facilities Planning & Management 1100 North
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS G. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS G. GEOLOGY AND SOILS The following section is based upon the City of El Segundo General Plan and General Plan EIR and addresses the following geologic issues: soil erosion,
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS E. GEOLOGY AND SOILS INTRODUCTION This section of the (Draft EIR) evaluates potential geology and soils impacts associated with development of the proposed (proposed Project
More informationC.Y. Geotech, Inc. Soil Engineering Investigation Victory Boulevard, Van Nuys, California. August 31, Ibid.
E. SOILS AND GEOLOGY The purpose of this section is to assess impacts related to geologic resources resulting from construction and development of the proposed project and adjacent Add Area, such as seismically
More information3.8 Geology/Soils. Environmental Setting. Topography. Geology and Soils
3.8 Geology/Soils This section examines whether implementation of the 2004 Land Use Mobility Elements, Zoning Code Revisions, and Central District Specific Plan the will expose people or structures to
More information4.5 GEOLOGY AND SOILS
4.5.1 Setting 4.5 GEOLOGY AND SOILS a. Regional Geology. The is located in the south central Santa Cruz Mountains in the heart of the Central Coast ranges of California. This is a seismically active region
More information4.6 GEOLOGY AND SOILS
The analysis in this Subsection is based, in part, on information contained in four (4) reports prepared by Southern California Geotechnical that assessed the existing surface and subsurface geologic conditions.
More informationSection 4.6 Geology and Soils Introduction
4.6 invisible_toc_marker County of Kern Section 4.6 Geology and Soils 4.6.1 Introduction As described in Chapter 2 of this Supplemental EIR (SEIR), an EIR was previously certified for the Alta Oak Creek
More informationGeology, Soils, and Seismicity
Section 3.8 Geology, Soils, and Seismicity Introduction This section generally evaluates the effects of the alternatives analyzed in this Supplemental DEIS with regard to geology, soils and seismicity.
More informationCOMMUNITY DEVELOPMENT DEPARTMENT POLICY & PROCEDURE
COMMUNITY DEVELOPMENT DEPARTMENT POLICY & PROCEDURE Policy No: DSP-OO3 Release Date: January 1, 2014 Effective Date: January 1, 2014 Revision Date: March 1, 2018 TITLE: The City Policy for Site Specific
More information4.5 GEOLOGY, SOILS AND SEISMICITY
4.5 This section summarizes information on geology, soils and seismic hazards, and mineral resources in the Truckee area, as well as potential area-wide geologic hazards and regional seismic characteristics
More information4.L GEOLOGY, SOILS, AND SEISMICITY 4.L.1 INTRODUCTION
4.L GEOLOGY, SOILS, AND SEISMICITY 4.L.1 INTRODUCTION This section addresses potential environmental effects of the proposed TOD Plan for Downtown Inglewood and Fairview Heights related to geology, soils,
More information4.5 GEOLOGY AND SOILS
4.5 GEOLOGY AND SOILS This section discusses the proposed project s potential impacts relating to geologic hazards. This section is partially based on the Preliminary Soil Engineering and Geologic Hazards
More information5.9 Geology and Soils
5.9 Geology and Soils 5.9 GEOLOGY AND SOILS This section evaluates the geologic and seismic conditions within the City of Azusa and evaluates the potential for geologic hazard impacts associated with
More information3.3 GEOLOGY AND SOILS Environmental Setting Geologic Conditions
3.3 GEOLOGY AND SOILS This section describes existing geologic and soil conditions, such as faults or unstable soils, and analyzes potential impacts that could pose hazards for the Fountain Valley Crossings
More information3.0 SUMMARY OF POTENTIAL GEOTECHNICAL IMPACTS AND MITIGATION MEASURES
3.0 SUMMARY OF POTENTIAL GEOTECHNICAL IMPACTS AND MITIGATION MEASURES This section summarizes the principal geotechnical conditions that occur in the project area. The potential impact that each condition
More information5. Environmental Analysis
5.4 This section of the Draft Environmental Impact Report (DEIR) evaluates the potential for implementation of the San Gorgonio Pass Campus Master Plan to impact geological and soil resources. The analysis
More information4.9 GEOLOGY AND SOILS
4.9 GEOLOGY AND SOILS 4.9.1 EXISTING CONDITIONS TOPOGRAPHY AND RELIEF Zone 40 is located in the central portion of Sacramento County. The topography of the county is represented by three physiographic
More information3.1.3 Geology and Soils
3.1.3 Geology and Soils This section addresses the potential geology and soils impacts associated with implementation of The Villages Escondido Country Club Project (Project). The section describes the
More information3.18 GEOLOGY AND SOILS
3.18 GEOLOGY AND SOILS This section discusses geologic resource concerns as they relate to the environment, public safety, and project design both during construction and after completion of the project.
More informationSLOPE STABILITY EVALUATION AND ACCEPTANCE STANDARDS
INFORMATION BULLETIN / PUBLIC - BUILDING CODE REFERENCE NO.: LABC 7006.3, 7014.1 Effective: 01-01-2017 DOCUMENT NO.: P/BC 2017-049 Revised: 12-21-2016 Previously Issued As: P/BC 2014-049 SLOPE STABILITY
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS F. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS F. GEOLOGY AND SOILS INTRODUCTION This section of the DEIR evaluates potential impacts to the project site s geologic environment that may result from implementation of
More information3.10 GEOLOGY AND SOILS
3.10 GEOLOGY AND SOILS This section evaluates the potential impacts of the proposed project on geology, soils, and seismic hazards. This evaluation is based on the Preliminary Geotechnical Investigation
More information4.4 GEOLOGY AND SOILS Existing Conditions
4.4 GEOLOGY AND SOILS This section evaluates the direct, indirect, short-term, and long-term effects of the proposed Cypress College Facilities Master Plan (proposed project) on geology, soils, and exposure
More information4.6 GEOLOGY AND SOILS
4.6 GEOLOGY AND OIL 4.6.1 ummary able 4.6-1 summarizes the identified environmental impacts, proposed mitigation measures, and residual impacts of the proposed project with regard to geology and soils.
More information3.4 Geology/Soils/Paleontological Resources
Section 3.4 Geology, Soils, and Paleontological Resources This section evaluates potential geology and soils impacts, and also paleontological impacts. The analysis is based on a preliminary geotechnical
More informationPRELIMINARY WORKING DRAFT Work in Progress
IV. ENVIRONMENTAL IMPACT ANALYSIS H. MINERAL RESOURCES 1.0 INTRODUCTION This section addresses the potential impacts of the Proposed Project on mineral resources (i.e., sand, gravel and petroleum). The
More information3.5 Geology and Soils
3.5 GEOLOGY AND SOILS The following reports have been prepared to analyze the geological impacts of the proposed project and are included in their entirety in Appendices F1 through F7 of this Draft Environmental
More informationSLOPE STABILITY EVALUATION AND ACCEPTANCE STANDARDS
INFORMATION BULLETIN / PUBLIC - BUILDING CODE REFERENCE NO.: LAMC 98.0508 Effective: 1-26-84 DOCUMENT NO. P/BC 2002-049 Revised: 11-1-02 Previously Issued As: RGA #1-84 SLOPE STABILITY EVALUATION AND ACCEPTANCE
More informationENVIRONMENTAL IMPACT ANALYSIS C. GEOLOGY AND SOILS
IV. ENVIRONMENTAL IMPACT ANALYSIS The following analysis of geology, soils and seismic hazards is based primarily upon the technical report Geotechnical Engineering Investigation Proposed Fashion Square
More information2. Initial Summary of Preliminary Expert Opinion of Converse and Psomas Reports
UNITED WALNUT TAXPAYERS PRELIMINARY REVIEW OF NEGATIVE GEOTECHNICAL AND GEOLOGICAL ASPECTS OF CONSTRUCTING EARTHFILL PAD FOR A SOLAR FARM ON THE WEST PARCEL - DRAFT 1. Introduction A licensed Engineering
More information4.5 Geology, Soils and Seismicity Environmental Setting Impacts and Mitigation Measures References...4.
TABLE OF CONTENTS 4.5 Geology, Soils and Seismicity...4.5-1 4.5.1 Environmental Setting...4.5-1 4.5.2 Impacts and Mitigation Measures...4.5-6 4.5.3 References...4.5-9 FIGURES Figure 4.5-1 Active and Potentially
More information3.5 GEOLOGY Introduction Environmental Setting
3.5 GEOLOGY 3. Affected Environment and Environmental Analysis 3.5 GEOLOGY 3.5.1 Introduction This section provides information about the geologic conditions of the project site and surrounding area, and
More informationENVIRONMENTAL IMPACT ANALYSIS C. GEOLOGY
IV. ENVIRONMENTAL IMPACT ANALYSIS C. GEOLOGY This section summarizes the results of a geotechnical evaluation conducted for the proposed project by Jerry Kovacs and Associates, Inc. in August 1996. The
More information5.5 GEOLOGY/SOILS EXISTING CONDITIONS. Regulatory Setting
5.5 GEOLOGY/SOILS This section describes existing environmental conditions related to geology and soils in the project area, including W-19, the disposal site, and beach placement sites proposed as part
More information5.3 GEOLOGY AND SOILS
5.3 GEOLOGY AND SOILS SUMMARY The impact analysis presented in this section evaluates project impacts related to geologic hazards. The geotechnical analyses prepared for the project concluded that the
More information3.10 GEOLOGY/SOILS/SEISMIC/TOPOGRAPHY
3.10 GEOLOGY/SOILS/SEISMIC/TOPOGRAPHY The information in this section is based on the Geotechnical Final Report (January 2010) and Geotechnical Memorandum for the northern portion of the Study Area (Department
More information3.5 GEOLOGY Introduction Environmental Setting
3.5 GEOLOGY 3. Affected Environment and Environmental Analysis 3.5 GEOLOGY 3.5.1 Introduction This section provides information about the geologic conditions of the project site and surrounding area, and
More information4.6 GEOLOGY, SOILS, AND MINERAL RESOURCES
Ascent Environmental 4.6 GEOLOGY, SOILS, AND MINERAL RESOURCES This section of the EIR describes the existing geology, soils, and mineral resources at and in the vicinity of the project site and analyzes
More informationPierce County Department of Planning and Land Services Development Engineering Section
Page 1 of 7 Pierce County Department of Planning and Land Services Development Engineering Section PROJECT NAME: DATE: APPLICATION NO.: PCDE NO.: LANDSLIDE HAZARD AREA (LHA) GEOLOGICAL ASSESSMENT REPORT
More information4.6 GEOLOGY AND SOILS
LSA ASSOCIATES, INC. MARCH 2008 FINAL ENVIRONMENTAL IMPACT REPORT YUCCA VALLEY RETAIL SPECIFIC PLAN The purpose of the Geology and Soils section is to evaluate whether the proposed project would create
More informationGuidelines for Site-Specific Seismic Hazard Reports for Essential and Hazardous Facilities and Major and Special-Occupancy Structures in Oregon
Guidelines for Site-Specific Seismic Hazard Reports for Essential and Hazardous Facilities and Major and Special-Occupancy Structures in Oregon By the Oregon Board of Geologist Examiners and the Oregon
More informationNovember 16, 2016 Revised August 15, 2017 File No Trammell Crow Company 2221 Rosecrans Avenue, Suite 200 El Segundo, California 90245
November 16, 2016 Revised August 15, 2017 File No. 21338-01 Trammell Crow Company 2221 Rosecrans Avenue, Suite 200 El Segundo, California 90245 Attention: Karen Shorr Subject: Geotechnical Assessment Site
More informationCOMMENT CARD RESPONSES (SEISMIC)
COMMENT CARD 1 1. Please explain once and for all why the original route isn t an option while it s safer and cheaper, instead of going under the high school? Response: Please refer to the November Community
More informationDate: April 2, 2014 Project No.: Prepared For: Mr. Adam Kates CLASSIC COMMUNITIES 1068 E. Meadow Circle Palo Alto, California 94303
City of Newark - 36120 Ruschin Drive Project Draft Initial Study/Mitigated Negative Declaration Appendix C: Geologic Information FirstCarbon Solutions H:\Client (PN-JN)\4554\45540001\ISMND\45540001 36120
More information8.0 GEOLOGY AND SOILS
This section describes the current geologic and soil conditions at each of the Dollar General project sites and analyzes issues related to geology and soils. Geotechnical studies have been prepared for
More information5.5 Geology and Soils
5.5 Geology and Soils The analysis in this section of the EIR addresses the potential impacts associated with geology and soils that may occur due to implementation of the proposed Collier Park Renovations
More information5.6 GEOLOGY, SOILS, AND SEISMICITY
This section discusses the geology of the Project area and general vicinity and analyzes hazards related to geology and soils, such as potential exposure of people and property to geologic hazards, landform
More informationSection 3.5 Geology and Soils ENVIRONMENTAL SETTING GEOLOGIC SETTING
Section 3.5 Geology and Soils This section discusses the environmental setting, existing conditions, regulatory context, and potential impacts of the project in relation to geology and soils. The information
More information5.5 GEOLOGY, SOILS, AND SEISMICITY
5.5 GEOLOGY, SOILS, AND SEISMICITY This section of the environmental impact report (EIR) describes the existing geology and soils conditions in the Project area and analyzes the potential for impacts associated
More information4.4 GEOLOGY AND SOILS
4.4 GEOLOGY AND SOILS SUMMARY This section describes the existing geologic and soils conditions on the project site, and the potential for geotechnical hazards to affect the Via Princessa East Extension
More informationIV. ENVIRONMENTAL IMPACT ANALYSIS K. GEOLOGIC AND SEISMIC HAZARDS
IV. ENVIRONMENTAL IMPACT ANALYSIS K. GEOLOGIC AND SEISMIC HAZARDS 1. ENVIRONMENTAL SETTING This section provides an analysis of seismic hazards such as fault rupture, ground shaking, land sliding, and
More informationENGINEER S CERTIFICATION OF FAULT AREA DEMONSTRATION (40 CFR )
PLATTE RIVER POWER AUTHORITY RAWHIDE ENERGY STATION BOTTOM ASH TRANSFER (BAT) IMPOUNDMENTS LARIMER COUNTY, CO ENGINEER S CERTIFICATION OF FAULT AREA DEMONSTRATION (40 CFR 257.62) FOR COAL COMBUSTION RESIDUALS
More information5.4 GEOLOGY AND SOILS
5.4 GEOLOGY AND SOILS INTRODUCTION This section describes the geology and soils of the project site and analyzes issues such as potential exposure of people and future improvements to geologic and seismic
More informationCHAPTER GEOLOGICALLY HAZARDOUS AREAS Applicability Regulations.
CHAPTER 19.07 GEOLOGICALLY HAZARDOUS AREAS 19.07.010 Applicability. Geologically hazardous areas may pose a threat to the health and safety of citizens when incompatible development is sited in areas of
More information5.5 Geology, Soils and Seismicity
5.5 Geology, Soils and Seismicity 5.5.1 Introduction Information and recommendations presented in this section were taken from the original East Lake Specific Plan Environmental Impact Report (EIR) [State
More informationThe primary native soil types in the San Gabriel Mountains are silt loam and sand (SCAG, 2004).
4.4 GEOLOGY AND SOILS 4.4.1 Existing Setting 4.4.1.1 Regional Geology and Soils The Master Plan study area is a 1-mile wide corridor along 58 river miles of the San Gabriel River in southern California,
More informationIV. Environmental Impact Analysis F. Geology and Soils
IV. Environmental Impact Analysis F. Geology and Soils 1. Introduction This section addresses potential geologic and soils hazards attributable to the Proposed Project. This section is based, in part,
More information4.5 GEOLOGY AND SOILS
4.5 GEOLOGY AND SOILS INTRODUCTION This section describes the existing geological and soil resources within the City, identifies the regulatory framework with respect to regulations that address geological
More informationAPPENDIX IV.A Geotechnical Study
City of Los Angeles February 2014 APPENDIX IV.A Geotechnical Study Technical Appendices Museum Square Office Building Draft Environmental Impact Report February 8, 2013 File No. 20477 5757 Wilshire, LLC
More information4.5 GEOLOGY AND SOILS
4.5 GEOLOGY AND SOILS Geologic and soil conditions on campus are generally as described in the 1989 LRDP EIR. Relevant information from the Earth Resources section (pages 147-157) in Volume I of that document
More informationSURFACE GEOLOGY AND LIQUEFACTION SUSCEPTIBILITY IN THE INNER RIO GRANDE VALLEY NEAR ALBUQUERQUE, NEW MEXICO
SURFACE GEOLOGY AND LIQUEFACTION SUSCEPTIBILITY IN THE INNER RIO GRANDE VALLEY NEAR ALBUQUERQUE, NEW MEXICO Keith I. Kelson, Christopher S. Hitchcock, and Carolyn E. Randolph William Lettis & Associates,
More informationAppendix 6A Geologic Information about the Project Area prepared by Ninyo & Moore October 2008
Appendix 6A Geologic Information about the Project Area prepared by Ninyo & Moore October 2008 Appendix 6A: Geologic Information about the Project Area 6A-1Existing Geologic and Subsurface Conditions
More information4.5 GEOLOGY, SOILS, AND SEISMICITY
4.5 GEOLOGY, SOILS, AND SEISMICITY 4.5 GEOLOGY, SOILS, AND SEISMICITY INTRODUCTION The Geology, Soils, and Seismicity chapter of the EIR describes the geologic and soil characteristics of the (proposed
More information3.12 Geology and Topography Affected Environment
3 Affected Environment and Environmental Consequences 3.12 Geology and Topography 3.12.1 Affected Environment 3.12.1.1 Earthquakes Sterling Highway MP 45 60 Project Draft SEIS The Kenai Peninsula is predisposed
More information(THIS IS ONLY A SAMPLE REPORT OR APPENDIX OFFERED TO THE USERS OF THE COMPUTER PROGRAM
C A U T I O N!! (THIS IS ONLY A SAMPLE REPORT OR APPENDIX OFFERED TO THE USERS OF THE COMPUTER PROGRAM EQLique&Settle2. THE AUTHOR IS HEREBY RELEASED OF ANY LIABILITY FOR ANY INCORRECT USE OF THIS SAMPLE
More information4.5 Geology and Soils
Environmental Impact Analysis Geology and Soils 4.5 Geology and Soils This section assesses potential impacts related to geologic and soil hazards. 4.5.1 Setting a. Topography and Geology San Leandro is
More information4.5 GEOLOGY AND SOILS
4.5.1 INTRODUCTION This resource section evaluates the potential environmental effects related to geology and soils from implementation of. The analysis includes a review of regional geology, seismicity
More informationSacramento Modesto Roseville Pleasanton September 19, 2013 Marcia Medina GHD Inc. 417 Montgomery Street, Suite 700 San Francisco, CA Subject: GE
Sacramento Modesto Roseville Pleasanton September 19, 2013 Marcia Medina GHD Inc. 417 Montgomery Street, Suite 700 San Francisco, CA 94104 Subject: GEOTECHNICAL REPORT AMENDMENT Stonybrook Creek Crossings
More information4.5 GEOLOGY AND SOILS
4.5 GEOLOGY AND SOILS This section discusses the Project s potential impacts relating to geologic hazards. This section is partially based on the Geotechnical Engineering Report included in Appendix E.
More information3.6 Geology, Soils, and Seismicity
0 0... Existing Conditions... Regulatory Setting Federal There are no federal laws, regulations, or standards related to geology and soils that are applicable to the Proposed Project. State Alquist-Priolo
More informationExecutive Summaries for the Century City Area Tunneling Safety Report and Fault Investigation Report
` Executive Summaries for the Century City Area Tunneling Safety Report and Fault Investigation Report Prepared for: Prepared by: October 19, 2011 Executive Summaries for the Century City Area Tunneling
More information3.1 GEOLOGY AND SOILS Introduction Definition of Resource
3.1 GEOLOGY AND SOILS 3.1.1 Introduction 3.1.1.1 Definition of Resource The geologic resources of an area consist of all soil and bedrock materials. This includes sediments and rock outcroppings in the
More informationRoy Pyle March 24, 2017 Chief Facilities Planner Contra Costa Community College District 500 North Court Street Martinez, CA 94533
State of California Natural Resources Agency Edmund G. Brown Jr., Governor Department of Conservation John G. Parrish, Ph.D., State Geologist California Geological Survey 801 K Street MS 12-31 Sacramento,
More information3.6 GEOLOGY AND SOILS
3.6 GEOLOGY AND SOILS This section of the EIR examines the regional and local geologic and soil characteristics of the project site and surrounding area. For the lagoon enhancement component, the analysis
More information3.5 Geology, Soils, and Paleontology
3.5 Geology, Soils, and Paleontology Overview of Impacts The analytical approach taken by this Subsequent EIR is described in Section 3.0 (Introduction to Environmental Analysis). The following section
More information4.6 GEOLOGY AND SOILS
4.6 GEOLOGY AND SOILS The purpose of the Geology and Soils section is to evaluate whether the proposed project would expose people or structures to major geotechnical hazards or substantially contribute
More informationJ. Paul Guyer, P.E., R.A.
J. Paul Guyer, P.E., R.A. Paul Guyer is a registered mechanical engineer, civil engineer, fire protection engineer and architect with over 35 years experience in the design of buildings and related infrastructure.
More informationJ.H. Campbell Generating Facility Pond A - Location Restriction Certification Report
J.H. Campbell Generating Facility Pond A - Location Restriction Certification Report Pursuant to: 40 CFR 257.60 40 CFR 257.61 40 CFR 257.62 40 CFR 257.63 40 CFR 257.64 Submitted to: Consumers Energy Company
More information