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HomeMy WebLinkAboutItem 4.1 GHAD FV Revised Eng RptSTAFF REPORT DISTRICT CLERK FALLON VILLAGE File #360 -60 GEOLOGIC HAZARD ABATEMENT DISTRICT DATE: July 16, 2013 TO: Honorable President and Board of Directors FROM: Joni Pattillo City of Dublin City Manager""'', " SUBJECT: Approval and Adoption of a Revised Plan of Control and Revised Engineer's Report for the Fallon Village Geologic Hazard Abatement District Prepared by Andrew Russell, Dublin City Engineer EXECUTIVE SUMMARY: The Fallon Village Geologic Hazard Abatement District was formed in December 2007 and began collecting assessments in fiscal year 2008 -2009, in order to cover the expenses of maintaining and operating the District improvements. Fallon Village includes a habitat preserve that was required under State and Federal species protection laws. Following formation of the District, a conservation easement was established which will require the District to pay for annual conservation easement management and may require the District to pay an endowment to the easement manager, Agricultural - Natural Resources Trust of Contra Costa County. The Fallon Village developer, Braddock & Logan, has submitted to the District, a revised Plan of Control and revised Engineer's Report to address the conservation easement management activities and the associated costs. The revised Plan of Control and revised Engineer's Report do not require an increase to the maximum assessment rates allowed within the District. FINANCIAL IMPACT: The District assessment funds District activities, which will include the management of the conservation easement. In order to avoid increasing the maximum assessment rate and to account for the cost of conservation easement management and a potential conservation easement endowment, the time period for building District reserves increased from three years to six years. During this three year extension, expenses that would have been District costs were instead paid for by the Fallon Village developer. The buildup of reserves for an additional three years offsets the annual expense for conservation easement management and provides reserve funds in the event a conservation easement endowment is needed. RECOMMENDATION: Staff recommends that the Board adopt the Resolution approving and adopting the Revised Plan of Control and approving and adopting the Revised Engineer's Report for the Fallon Village Geologic Hazard Abatement District. Page 1 of 3 ITEM NO. 4.1 K +e a Submit ed By Interim District Manager DESCRIPTION: wh / Vi Submitted By Interim District Treasurer YYY G// Reviewed y Assistant City Manager The Fallon Village Vesting Tentative Map 7586 ( "Project "), was approved by the Dublin Planning Commission on November 8, 2005. The Project conditions of approval required both the formation of a geologic hazard abatement district and the establishment of a conservation easement over a portion of property that would be owned by the geologic hazard abatement district. On November 6, 2007, the Dublin City Council was presented with a petition for the formation of the Fallon Village Geologic Hazard Abatement District ( "District "). The petition included the "Plan of Control for Fallon Village Geologic Hazard Abatement District, Dublin, California," dated May 8, 2007 and revised October 4, 2007, by Engeo Incorporated ( "Plan of Control "). The Plan of Control identifies the District's responsibilities, which include maintenance of open space, including areas subject to a conservation easement. On December 4, 2007, the Dublin City Council established the District with adoption of City Council Resolution 216 -07. On February 5, 2008, the District Board of Directors authorized assessments within the District for the 2008 -2009 fiscal year and subsequent years. The assessment amounts were apportioned according to the "Engineer's Report for Fallon Village Geologic Hazard Abatement District, Dublin, California," dated May 29, 2007 and revised December 13, 2007, by Engeo Incorporated ( "Engineer's Report "). The initial maximum annual assessment was established at $488 for residential units. The maximum assessment is adjusted annually to reflect the percent change in the San Francisco - Oakland -San Jose Consumers Price Index (CPI) for All Urban Consumers. For fiscal year 2012 -13, the maximum assessment was $541.48 for residential units. In accordance with the Project conditions of approval, the Fallon Village developer, Braddock & Logan, established a 172 -acre conservation easement by granting a Conservation Easement Deed to Agricultural - Natural Resources Trust of Contra Costa County (ANRT) in September 2011. ANRT is currently managing the conservation easement through an interim agreement with Braddock & Logan. Once the District takes control of the District improvements from Braddock & Logan, the District will be responsible for expenses associated with conservation easement management. Staff has prepared a separate report to the Board related to ANRT's long -term conservation easement management once the District takes control of the property. Revised Plan of Control and Revised Engineer's Report: The 2007 Plan of Control and 2007 Engineer's Report did not explicitly detail the activities and costs associated with conservation easement management, because the details of the Conservation Easement Deed and ANRT's costs were not known in 2007. Once Braddock & Logan understood the activities and costs, they approached staff to discuss how the District would handle conservation easement management (see also Conservation Easement Costs below). Through discussions with staff and Engeo Incorporated, Braddock & Logan decided to extend the period of time that Braddock & Logan would be responsible for owning and Page 2 of 3 maintaining District improvements. This was done instead of increasing the maximum assessment in part because Proposition 218 requires a majority vote of District property owners in order to increase the maximum assessment beyond the annual CPI adjustment. Braddock & Logan hired Engeo to analyze the additional time it would take for the District reserves to build up, such that the cost of conservation easement management would be covered. Engeo determined that increasing the time period, from three years to six years, would allow the District reserves to build up and cover the conservation easement maintenance costs. The time period adjustment from three years to six years and the annual expense for conservation easement management require that both the Plan of Control and the Engineer's Report be revised. Engeo has revised both documents and submitted them for Board consideration. Staff has reviewed the revised reports and recommends that the Board approve and adopt the revised Plan of Control and the revised Engineer's Report. Conservation Easement Costs: ANRT, as holder of the Conservation Easement Deed, is responsible in for the management of the conservation easement. ANRT's fee for managing the conservation easement is $10,000 per year. The fee is to be adjusted annually to reflect the percentage change in the San Francisco - Oakland -San Jose Consumers Price Index for All Urban Consumers. The Engineer's Report budget (Attachment 3), includes an annual expense for onsite conservation easement activities of $11,097, which represents the $10,000 per year fee plus the cumulative CPI increases of 10.97 %. This is the same percentage that the maximum District assessment has increased since the first assessment in fiscal year 2008 -2009. ANRT, as holder of the Conservation Easement Deed, is required to manage the conservation easement. In the event that the District terminates the agreement with ANRT, then ANRT will needs a $300,000 endowment to fund their continuing obligations. The Engineer's Report budget assumes that the District will pay the annual fee instead of paying a $300,000 endowment. Should an endowment be needed, the District budget reserves would be needed to fund the endowment. The developer has maintained the property, at the developer's cost, in accordance with the Plan of Control for the past six years. The increase of time, from three years to six years, for conveyance to the District has allowed the District reserves to increase, while at the same time the District has not expended funds to maintain the property. The accumulation of funds in the District reserve for the past three years has caused the reserve to grow sufficiently to cover the full potential $300,000 endowment, should the District terminate the agreement with ANRT. The District reserve balance for fiscal year 2012 -2013 was projected to be $633,000. NOTICING REQUIREMENTS /PUBLIC OUTREACH: None required. Copies of staff report provided to both Braddock & Logan and Engeo Inc. ATTACHMENTS: 1. Resolution Approving and Adopting the Revised Plan of Control and Approving and Adopting the Revised Engineer's Report for the Fallon Village Geologic Hazard Abatement District 2. Exhibit "A" to Resolution, Plan of Control 3. Exhibit "B" to Resolution, Engineer's Report Page 3 of 3 FALLON VILLAGE GHAD RESOLUTION NO. - 13 A RESOLUTION OF THE BOARD OF THE FALLON VILLAGE GEOLOGIC HAZARD ABATEMENT DISTRICT APPROVING AND ADOPTING THE REVISED PLAN OF CONTROL AND APPROVING AND ADOPTING THE REVISED ENGINEER'S REPORT FOR THE FALLON VILLAGE GEOLOGIC HAZARD ABATEMENT DISTRICT WHEREAS, this Resolution is adopted pursuant to the provisions of Division 17 (Section 26500 et seq.) of the Public Resources Code, entitled "Geologic Hazard Abatement Districts" ( "the GHAD law "); and WHEREAS, Vesting Tentative Tract Map 7586 was approved by the City of Dublin Planning Commission Resolution 05 -61 on November 8, 2005; and WHEREAS, conditions of approval of Vesting Tentative Tract Map 7586 required the formation of the Fallon Village Geologic Hazard Abatement District ( "District ") to be responsible for ownership and maintenance of property within the subdivision ( "Property "); and WHEREAS, conditions of approval of Vesting Tentative Tract Map 7586 required a conservation easement be offered for dedication over property to be owned by the District; and WHEREAS, state law authorizes Geologic Hazard Abatement Districts to own property, and by inference to be bound by existing easements and obligations on such property; and WHEREAS, on November 6, 2007, the City Council of the City of Dublin was presented with a petition for the formation of the Fallon Village Geologic Hazard Abatement District ( "GHAD Petition ") including the "Plan of Control for Fallon Village Geologic Hazard Abatement District, Dublin, California," dated May 8, 2007 and revised October 4, 2007, by Engeo Incorporated ( "Plan of Control "); and WHEREAS, the Plan of Control describes in detail geologic hazards, their location and the areas affected thereby, and a plan for the prevention, mitigation, and abatement and control of the geologic hazards; and WHEREAS, the Plan of Control describes a three -year period of time between levying of the assessment and incurring expenses related to the prevention, mitigation, and abatement and control of geologic hazards, and said three -year period was to allow the District to accumulate reserve funds without incurring significant expenses; and WHEREAS, on December 4, 2007, the City Council of the City of Dublin adopted City Council Resolution No. 216 -07, approving the formation of the Fallon Village Geologic Hazard Abatement District as described in the GHAD Petition including the Plan of Control; and WHEREAS, on February 5, 2008, the District Board of Directors adopted Resolution No. 01 -08, confirming the assessment and ordering the levy and collection of assessments to pay for the cost and expenses of the maintenance and operations of improvements within the District; and WHEREAS, Resolution No. 01 -08, authorized assessments within the District for the 2008 -2009 fiscal year and subsequent years, the assessment amounts apportioned in accordance with the "Engineer's Report for Fallon Village Geologic Hazard Abatement District, Dublin, California," dated May 29, 2007 and revised December 13, 2007, by Engeo, Incorporated ( "Engineer's Report "); and WHEREAS, the Engineer's Report budget did not include estimated annual expenses for annual conservation easement management expenses or reserve funds for a conservation easement endowment, should one be needed; and WHEREAS, the developer of Vesting Tentative Tract Map 7586, Braddock and Logan, submitted a revised Plan of Control and a revised Engineer's Report for consideration by District; and WHEREAS, the revised Plan of Control extends the period of time between the District levying of assessments and incurring expenses to six years to allow for accumulation of reserves for estimated annual expenses for onsite conservation easement activities and for a conservation easement endowment, should one be needed; and WHEREAS, the revised Engineer's Report budget includes estimated annual expenses for onsite conservation easement activities, and WHEREAS, Braddock and Logan has maintained the Property, including the conservation easement, at no expense to the District, for the past six years to allow for accumulation of District reserves. NOW, THEREFORE, BE IT RESOLVED that the Board of Directors of the Fallon Village Geologic Hazard Abatement District hereby approves and adopts the attached "Plan of Control for Fallon Village Geologic Hazard Abatement District, Dublin California," dated May 8, 2007, revised July 3, 2013, by Engeo Incorporated. BE IT FURTHER RESOLVED that the Board of Directors of the Fallon Village Geologic Hazard Abatement District hereby approves and adopts the "Engineer's Report for Fallon Village Geologic Hazard Abatement District, Dublin, California," dated July 3, 2013, by Engeo Incorporated. BE IT FURTHER RESOLVED that the District Clerk shall certify the adoption of this Resolution. BE IT FURTHER RESOLVED that this Resolution shall take effect immediately upon adoption. PASSED, APPROVED AND ADOPTED this 16th day of July, 2013, by the following vote: AYES: NOES: ABSENT: ABSTAIN: ATTEST: District Clerk Board President S: 9 PLAN OF CONTROL FOR FALLON VILLAGE GEOLOGIC HAZARD ABATEMENT DISTRICT DUBLIN, CALIFORNIA Submitted to: Mr. Jeff Lawrence Braddock & Logan Group 4155 Blackhawk Plaza Circle, Suite 201 Danville, CA 94526 -4668 u F Prepared by: ENGEO Incorporated May 8, 2007 Latest Revision July 3, 2013 Project No: 4663.101.001 ENGEO Expect Excellence May 8, 2007 Latest Revision July 3, 2013 Mr. Jeff Lawrence Braddock & Logan Group 4155 Blackhawk Plaza Circle, Suite 201 Danville, CA 94526 -4668 Subject: Fallon Village Dublin, California PLAN OF CONTROL FOR FALLON VILLAGE GEOLOGIC HAZARD ABATEMENT DISTRICT Dear Mr. Lawrence: GEOTECHNICAL ENVIRONMENTAL WATER RESOURCES CONSTRUCTION SERVICES Project No. 4663.101.001 The attached documents reflect revisions to the Fallon Village Plan of Control for the purpose of updating the Plan of Control to reflect funding of the onsite conservation easement by the Fallon Village Ranch Geologic Hazard Abatement District (GHAD). Sincerely, ENGEO Incorporated Eric Harrell, CEG eh /ue/bvv t1A L G 00 0' NA c�� No. 2189 Exp. 8/31/2013 �c CERTIFIED # �>1 EGEOLOGISTG �P OF CA�\Fo� Uri Eliahu, GE 2010 Crow Canyon Place, Suite 250 • San Ramon, CA 94583 • (925) 866 -9000 • Fax (888) 279 -2698 www.engeo.com Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 TABLE OF CONTENTS Letter of Transmittal 1.0 AUTHORITY AND SCOPE ........................................... ..............................1 6.2 1.1 PROPERTY IDENTIFICATION .......................................... ..............................1 2.0 BACKGROUND .............................................................. ..............................1 CONTROL OF GEOLOGIC HAZARDS ............................. ..............................8 2.1 EXISTING SITE CONDITIONS ........................................... ..............................1 6.3 2.2 PROPOSED DEVELOPMENT ............................................. ..............................1 2.3 OPEN SPACE .......................................................................... ..............................2 6.3.1 Isolated or Remote Slope Instability .............................. ..............................9 2.4 GRAD RESPONSIBILITIES ................................................. ..............................2 3.0 GEOLOGY ....................................................................... ..............................3 3.1 REGIONAL GEOLOGY AND GEOLOGIC MAPS ........... ..............................3 4.0 SLOPE STABILITY CONSIDERATIONS DURING MASS GRADING........................................................................ ..............................3 5.0 GEOLOGIC HAZARDS ................................................ ..............................4 5.1 SLOPE INSTABILITY ........................................................... ..............................4 5.2 SEISMICALLY INDUCED GROUND SHAKING ............. ..............................7 5.3 EXPANSIVE SOILS ................................................................ ..............................8 5.4 COMPRESSIBLE SOILS ....................................................... ..............................8 6.0 AREAS OF DISTRICT RESPONSIBILITY ................ ..............................8 6.1 SCOPE OF ACTIVITIES ....................................................... ..............................8 6.2 PREVENTION, MITIGATION, ABATEMENT AND /OR CONTROL OF GEOLOGIC HAZARDS ............................. ..............................8 6.3 EXCEPTIONS .......................................................................... ..............................9 6.3.1 Isolated or Remote Slope Instability .............................. ..............................9 6.3.2 Single Property ............................................................... ..............................9 6.4 VERTICAL MOVEMENT OR CREEP DUE TO SHRINK SWELL ORSETTLEMENT ................................................................. ..............................9 6.5 PROPERTY NOT ACCEPTED ............................................. ..............................9 6.5.1 Hazard(s) or Failure(s) Resulting From Negligence ..... .............................10 6.6 DISTRICT FUNDING OR REIMBURSEMENT FOR DAMAGED OR DESTROYED STRUCTURES OR SITE IMPROVEMENTS ................10 6.7 NO REIMBURSEMENT OF EXPENSES INCURRED BY PROPERTY OWNERS .......................................................... .............................10 6.8 PROTECTED WILDLIFE HABITAT ................................. .............................10 7.0 FUNDING AND ACCEPTANCE OF RESPONSIBILITY BY THEDISTRICT .............................................................. .............................11 ENGEO Expect Excellence Braddock & Logan Group Plan of Control for Fallon Village GHAD TABLE OF CONTENTS (Continued) 4663.101.001 May 8, 2007 Latest Revision July 3, 2013 7.1 1. ACTIVATION OF ASSESSMENT .................................. .............................11 7.2 2. RESPONSIBILITY FOR GRAD ACTIVITIES ............ .............................11 7.3 3. OWNERSHIP OF THE OPEN SPACE .......................... .............................11 7.4 4. PROCESS FOR TRANSFERRING RESPONSIBILITY FOR GRAD ACTIVITIES .............................................................. .............................11 8.0 GEOTECHNICAL TECHNIQUES FOR MITIGATION OF LANDSLIDE, SOIL CREEP AND EROSION HAZARDS ....................12 8.1 LANDSLIDE NHTIGATION FOR EXISTING DEBRIS FLOWS AND LANDSLIDES ............................................................... .............................12 8.2 GENERAL LANDSLIDE N HTIGATION ............................ .............................14 9.0 BIOTECHNICAL RECOMMENDATIONS FOR PREVENTION AND MITIGATION OF EXISTING OR POTENTIAL EROSION HAZARDS....................................................................... .............................15 10.0 PRIORITY FOR DISTRICT FUNDED REPAIRS ..... .............................16 11.0 MAINTENANCE AND MONITORING SCHEDULE ............................16 12.0 OPEN SPACE OWNERSHIP AND MANAGEMENT ............................17 13.0 RIGHT O&ENTRY ....................................................... .............................19 REFERENCES APPENDIX A: Exhibit A — Limits of the Fallon Village Geologic Hazard Abatement District Exhibit B — Boundaries of the District Area Figure 1— Geotechnical Corrective Grading Plan Figure 2 — Geologic Map Figure 3 — Open Space and Improvements Ownership/Maintenance Plan APPENDIX B: Operations and Maintenance Manual for Bioretention Facilities, Tract 7586 at Fallon Village, prepared by ENGEO Incorporated APPENDIX C: Fallon Village Site Geology ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 1.0 AUTHORITY AND SCOPE The Fallon Village Geologic Hazard Abatement District ( "District ") was formed under authority of the California Public Resources Code, Division 17, commencing with Section 26500. The boundaries of the District comprise a total of approximately 488 acres. For the Fallon Village Project, Condition of Approval (COA) No. 76 requires the formation of a Geologic Hazard Abatement District ( "GHAD "). To satisfy this requirement, the developer of Fallon Village is submitting this Plan of Control to allow the District to permanently monitor and maintain slopes, detention and water quality basins, storm drainage facilities and other improvements within the GHAD as described herein. Development of a Plan of Control is a requirement for formation of a GHAD. Pursuant to Section 26509 of the California Public Resources Code, this Plan of Control was prepared by an Engineering Geologist certified pursuant to Section 7822 of the Business and Professions Code. As required by Section 26509, it describes potential geologic hazards within the proposed District boundaries and provides a plan for the prevention, mitigation, abatement, or control thereof. As used in this Plan of Control, and as provided in Section 26507, "geologic hazard" means an actual or threatened landslide, land subsidence, soil erosion, earthquake, fault movement, or any other natural or unnatural movement of land or earth. 1.1 PROPERTY IDENTIFICATION The proposed District boundary is shown in the District Boundary Map on Exhibit A, and further described in the District Boundary Description on Exhibit B. 2.0 BACKGROUND 2.1 Existing Site Conditions The study area is approximately 488 acres and is located north of Highway 580 in Dublin. Prior to mass grading, site topography consisted of rolling, grass- covered hills generally increasing in elevation to the north. Site drainage is to the south, toward Arroyo Las Positas and the Livermore Valley. Prior to mass grading, most of the study area consisted of open, undeveloped land with local improvements related to agricultural or residential use. These improvements included barns, sheds, and dwellings, as well as roadways, driveways, and utilities. 2.2 Proposed Development The site plan prepared by Mackay and Somps shows 1,043 single - family lots. In addition, the plans show a school site, a neighborhood park site, four bioretention cells (2.4, 0.23, 0.21 and 0.48 acres), roadways and a 4.6 -acre neighborhood square site. A Preliminary Geotechnical -1- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 Exploration report was completed for the site by ENGEO dated February 23, 2003, and revised December 17, 2004. The ENGEO report titled Phase 1 - Corrective Grading Plans serves as a design -level geotechnical exploration report for the project. It is our understanding that bulk grading on the site will occur in four phases. As shown on the MacKay and Somps Grading Plans, they will include Phases 1 and 2 Bulk grading and later each of these areas will be regraded to the final elevations necessary for the construction roadways, building pads and other site improvements. The preliminary proposed site grading includes preparation of level building pads and roadways. As planned, grading will involve cuts and fills up to about 70 feet thick. Also, cut slopes as high as 170 feet are planned and fill slopes up to about 80 feet high are planned. 2.3 Open Space Project Open Space includes approximately 200 acres as shown in Open Space Plan with about 172.2 acres within a conservation easement (Figure 3). Title to the parcels comprising the open space will be conveyed to the GHAD approximately six years after the first residential building permit has been issued within the District. Since long -term maintenance and stability of the GHAD Property will protect the open space, which is an amenity that will benefit all of the current and future property owners, the funding for the GHAD's activities will be shared by all current and future property owners within the GHAD's boundaries. All such activities shall be consistent with this Plan of Control. 2.4 GRAD Responsibilities The GHAD will mitigate, prevent, abate or repair landslide or erosion hazards that could directly affect property within the GHAD boundary, as necessary to implement this Plan of Control. The GHAD will also assume open -space management responsibilities that are required for the Fallon Village project because, as property owner of the open space, the GHAD is obligated to comply with the terms of a Habitat Mitigation and Management Plan approved by the United States Fish & Wildlife Service and the California Department of Fish and Wildlife. These responsibilities will include vegetation management, erosion control, vegetation removal (fire suppression), and selected other maintenance associated with open space. In addition, the responsibility of the GHAD includes maintenance, monitoring and repair of bioretention cells, vegetation control, armoring of channels and desilting of detention basins. The GHAD's responsibilities will include, but may not be limited to, monitoring and maintenance for the following as appropriate. • Four bioretention cells. • Maintenance and repair of EVA and access roads. • Erosion repairs. -2- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 • Revegetation and vegetation control, including fire break mowing, weeding and additional hydroseeding as deemed necessary. • Sediment removal from concrete structures (applies only to open -space catch basins, field inlets, V- ditches and storm drain pipes). • Slope stabilization (includes minor landsliding and debris bench clearing). • Subdrain outfall maintenance. • Open -space storm drain pipe and V -ditch replacement. In addition, the GHAD will have maintenance, monitoring and repair responsibilities for slopes, which will include natural, reconstructed or partially reconstructed landslides as indicated within the referenced ENGEO reports and discussed in Section V. 3.0 GEOLOGY 3.1 Regional Geology and Geologic Maps The site is located within the Coast Ranges geologic province of California, a series of northwest - trending ridges and valleys. Bedrock at the site is mapped as non - marine sedimentary rock of the Tassajara Formation (QTt) (Dibblee, 1980) or as the Livermore Gravels (Graymer et al., 1994) of Late Pliocene to Pleistocene age. The rocks in the site vicinity have been tightly folded such that the bedrock layers (bedding) are generally inclined at a steep angle from the horizontal. Crane (1996) mapped the axes of anticlinal and synclinal folds through the north end of the site. The site is not located within a State of California Earthquake Fault Zone for active faults (CDMG, 1982). The nearest mapped active faults are the Calaveras fault located approximately 5 miles to the southwest and the Greenville fault located approximately 6 miles to the northeast. A more detailed discussion of the site geology is included as Appendix C of this Plan of Control. 4.0 SLOPE STABILITY CONSIDERATIONS DURING MASS GRADING As shown on the Corrective Grading Plans for Fallon Village (May 2006), existing artificial fills within the graded area have been removed and, as required, replaced with subdrained engineered fills (Figure 1). In graded or repaired areas, the unsuitable materials, including alluvium, colluvium and /or landslide debris will be overexcavated to firm undisturbed materials below the unsuitable material as determined by the Geotechnical Engineer or Engineering Geologist at the time of grading. Surface and subsurface drains will be installed to collect the surface and subsurface waters which may have initially caused the instability. The configuration of each subdrainage system will be tailored to the individual area at the time of grading. The Geotechnical Engineer and /or Engineering Geologist will determine the location and depths of -3- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 subdrains at that time. The location and elevation of subdrains and outlets will be surveyed during construction. Each subexcavation will then be reconstructed to final grade by keying and benching below the landslide plane with compacted, drained engineered fill. It is important to note that to preserve the natural topography, wildlife habitat and vegetation of the site, stabilization of landslide masses is currently planned only for landslides that directly threaten the proposed improvements. Slope instability in open -space parcels which does not have the potential to directly affect the GHAD- accepted homesites, roadways, habitat areas or other critical improvements will not be repaired, as provided in Section 6.0. The cuts will be viewed by the project Geologist during grading to provide mitigation schemes for unsuspected slope conditions which could decrease the slope stability. Such conditions include unfavorable bedrock attitudes and seepage conditions. A geology map will be prepared by the project Geologist for use by the GHAD. We expect that the extents of buttressed slopes and associated subdrain systems will be identified on as -built plans following construction. 5.0 GEOLOGIC HAZARDS Geologic hazards identified for the site in the geotechnical exploration reports include the following items. • Slope instability • Seismically induced ground shaking • Expansive soils • Compressible soils These geologic hazards are not expected to be eliminated entirely by site grading. Slope instability is not unique to this project, but is of importance for hillside projects throughout the San Francisco Bay Area. Future stability of these areas depends on various factors, including any introduction of natural or artificial groundwater, future grading and earthquake ground shaking. 5.1 Slope Instability During mapping for the site geotechnical exploration, areas of slope instability were identified throughout the planned development area and within the future open space areas. The geologic hazard map showing the location of each of the debris flows and landslides is included as Figure 2. The table below identifies each of the landslide areas within the development area and the proposed corrective measures. The "Current Designation" column shown on Table 5.1 -1 is the landslide labeling used on the corrective grading plan. The "Previous Designation" column identifies the landslide labeling used in the Geotechnical Exploration Report. Potential District monitoring or maintenance activities for the specific areas listed in the table below are discussed in Section 8.0. -4- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 TABLE 5.1 -1 Mapped Areas of Slope Instabilitv and Proposed Corrective Measures -5- ENGEO Expect Excellence Bulk Grading P1 LANDSLIDE Location I II Proposed Corrective I 1 1 Areas Current I 1 ' Landslide Designation Designation L 1 R25 G2, Earthflow Remove and replace. None Removal and replacement Landslide material may 1-2 Not Labeled G2, Earthflow of landslide material within not be removed downslope the limits of grading. of engineered fill slope. Removal and replacement Landslide material may 1-3 Not Labeled G2, Earthflow of landslide material within not be removed downslope the limits of grading. of engineered fill slope. L4 R13 G1, Earthflow Remove and replace. None L5 R14 G1, Earthflow Remove and replace. None L6 R8 G1, Earthflow Remove and replace. None Removal and replacement landslide material L 7 R7 G1, Earthflow of landslide material within w n will be removed. �� ill no the limits of the roe Buttress fill over lower No removal of landslide L7A Not Labeled G1, Deep seated portion of the landslide. material outside the civil limits of grading. Buttress fill over lower No removal of landslide L7B Not Labeled G1, Deep seated portion of the landslide. material outside the civil limits of grading. L8 R6 G1, Earthflow Remove and replace. None L9 R12 G1, Earthflow Remove and replace. None L10 Rl l G1, Earthflow Remove and replace. None L11 R10 G1, Earthflow Remove and replace. None Excavation of landslide Landslide material not L12 R17 G1, Rotational slump material within 20 feet of removed below 20 feet the pad grade. below the pad grade. Phase 2 Within building pads Landslide material not L12 R17 G1, Rotational slump excavation of landslide removed below 10 feet material within 10 feet of below the pad grade within the pad grade. buildable lots. -5- ENGEO Expect Excellence Braddock & Logan Group Plan of Control for Fallon Village GHAD 4663.101.001 May 8, 2007 Latest Revision July 3, 2013 A number of landslides are located within the open space areas of the District and mitigation is not planned for these areas of slope instability since they do not have the potential to impact the site improvements as discussed in Section 6.0. Since no mitigation is shown on the Corrective Grading Plan, these landslides were not relabeled and retain the designation from the Geotechnical Exploration Report. These landslides are described below and shown on Figure 2. -6- ENGEO Expect Excellence Bulk Grading Mq PW LANDSLIDE Location I II Proposed Corrective 1 1 Areas Current I 1 Landslide Designation Designation Within building pads, Landslide material not L 13 R16 G1, Rotational slump excavation of landslide removed below 20 feet material within 20 feet of below the pad grade within the pad grade. buildable lots. G2, (Lots and a Removal and replacement Landslide material may L 14 R -15 portion of Parcel "E "), of landslide material within not be removed downslope Rotational Slump the limits of grading. of engineered fill slope. G2 (Lots and adjacent Removal and replacement L15 R -19 slope), Slump flow of landslide material within None com lex the limits of grading. L16 R -26 G3, Earth flow Remove and replace. None Removal and replacement Offsite landslide material L 16A R -27 G3, Earthflow of landslide material within will not be removed. the limits of the property. L17 R -24 G2, Earth flow Remove and replace. None L18 R -25 G2, Earth flow Remove and replace. None L19 R -21 G2, Earth flow Remove and replace. None L20 R -22 G2, Earth flow Remove and replace. None L21 R -20 G2, Earth flow Remove and replace. None L22 R28, R -29 and Lots 976 -1004, Remove and replace. None R -30 Rotational Slum Lots 940 -942, 961 - L23 R -31 965 and 1013 -1017, Remove and replace. None Slump Flow Complex. L24 R -34 Lots 829 -831, Earth Remove and replace onsite Offsite portion of the flow landslide material. landslide. A number of landslides are located within the open space areas of the District and mitigation is not planned for these areas of slope instability since they do not have the potential to impact the site improvements as discussed in Section 6.0. Since no mitigation is shown on the Corrective Grading Plan, these landslides were not relabeled and retain the designation from the Geotechnical Exploration Report. These landslides are described below and shown on Figure 2. -6- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 TABLE 5.1 -2 Mapped Areas of Slope Instability Without Proposed Corrective Measures In addition to the landslides listed above, other areas of slope instability or landsliding will likely be identified during the life of the development. Since earth stability is the District's prime geotechnical concern, this section describes several types of slope instability that may be within the District's area of responsibility, subject to Section 6.0 of this Plan of Control. A landslide is defined as a mass of rock, soil and other debris that has been displaced downslope by sliding, flowing or falling. Landslides include cohesive block glides and disrupted slumps that have formed by displacement along a planar slip surface or rotation (displacement along a curved slip surface). Undercutting and erosion of hillside slopes trigger many slope failures. Slope failures are also often triggered by increased pore water pressure due to the infiltration of rainwater. The resulting decrease of shear resistance (internal resistance to deformation by shearing) can cause the slope to move. The level of the groundwater table varies with the amount of rainfall for the area. If rainfall is higher than average during the winter season, the water table will be higher than average on a hillslope and groundwater pressures may become dangerously high. Under these conditions, hillside movement can be activated. Areas of thicker soil cover on the hillslopes are known as colluvium (Qc). Colluvial deposits are typically the result of soil creep and may be in a weak, unconsolidated state, making them susceptible to landsliding if undercut. Colluvium is generally approximately ten to fifteen feet in thickness. Landslides and colluvial deposits located within open space areas are natural landforms that do not require mitigation except where they affect man-made improvements. Potential mitigation and repair measures for District areas near development are discussed in Section 8.0. 5.2 Seismically Induced Ground Shaking As identified in the geotechnical report, an earthquake of moderate to high magnitude generated within the San Francisco Bay Region could cause considerable ground shaking at the site, similar 7- ENGEO Expect Excellence Slide Designation R -1 to R -4 Type of Feature Earth flow Estimated Depth 15 R -5 Slump flow complex 30 R -9 Earth flow 10 R -18 Slump flow complex 40 R -19 Slump flow 30 R -23 Earth flow 15 R -32 and R -33 Earth flow 10 to 15 In addition to the landslides listed above, other areas of slope instability or landsliding will likely be identified during the life of the development. Since earth stability is the District's prime geotechnical concern, this section describes several types of slope instability that may be within the District's area of responsibility, subject to Section 6.0 of this Plan of Control. A landslide is defined as a mass of rock, soil and other debris that has been displaced downslope by sliding, flowing or falling. Landslides include cohesive block glides and disrupted slumps that have formed by displacement along a planar slip surface or rotation (displacement along a curved slip surface). Undercutting and erosion of hillside slopes trigger many slope failures. Slope failures are also often triggered by increased pore water pressure due to the infiltration of rainwater. The resulting decrease of shear resistance (internal resistance to deformation by shearing) can cause the slope to move. The level of the groundwater table varies with the amount of rainfall for the area. If rainfall is higher than average during the winter season, the water table will be higher than average on a hillslope and groundwater pressures may become dangerously high. Under these conditions, hillside movement can be activated. Areas of thicker soil cover on the hillslopes are known as colluvium (Qc). Colluvial deposits are typically the result of soil creep and may be in a weak, unconsolidated state, making them susceptible to landsliding if undercut. Colluvium is generally approximately ten to fifteen feet in thickness. Landslides and colluvial deposits located within open space areas are natural landforms that do not require mitigation except where they affect man-made improvements. Potential mitigation and repair measures for District areas near development are discussed in Section 8.0. 5.2 Seismically Induced Ground Shaking As identified in the geotechnical report, an earthquake of moderate to high magnitude generated within the San Francisco Bay Region could cause considerable ground shaking at the site, similar 7- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 to that which has occurred in the past. Seismic slope stability has been considered in the ENGEO designed geotechnical corrective grading plan; however, seismically generated slope failures could occur in open -space areas outside the development limits. 5.3 Expansive Soils Near - surface soil, colluvium and alluvium at the site could exhibit a moderate to critically high potential for expansion. These potentially expansive soils could impact the planned site development. Expansive soils shrink and swell as a result of moisture changes. This can cause heaving and cracking of slabs -on- grade, pavements and structures founded on shallow foundations. The potential for expansive soils has been identified in previous reports for the property. Shrink and swell of expansive soils on slopes is a portion of the mechanism of creep movement which can result in shallow slope instability. 5.4 Compressible Soils Based on the geotechnical data, it appears that minor settlement of as much as a few inches could result from consolidation of alluvial and colluvial deposits beneath deep fills and from consolidation of deep fills due to their own weight. Based on the proposed grading settlements experienced by site improvements due to design fills are anticipated to be minor. 6.0 AREAS OF DISTRICT RESPONSIBILITY 6.1 Scope of Activities The Fallon Village GHAD, as owner of the open space areas and basins within the site, will assume responsibilities that relate to its position as a GHAD and other duties of a responsible landowner. The GHAD is charged with responsibilities that relate to the prevention, mitigation, abatement, and control of geologic hazards. This includes, but is not limited to, the maintenance of facilities that enhance site stability such as drainage facilities and associated improvements. This may include the monitoring and maintenance of drainage facilities and associated resources which, if subject to improper care, could result in decreased slope stability, the prime concern of the GHAD. In addition, the GHAD will be responsible for maintenance of designated trails planned within the open space area. Improper maintenance of the trail system could facilitate erosion, a prime concern for the GHAD. Funding for conservation activities are described in the Engineer's Report for the Fallon Village GHAD. 6.2 Prevention, Mitigation, Abatement and /or Control of Geologic Hazards Subject to the following exceptions, the primary mission of the District shall be the prevention, mitigation, abatement and /or control of geologic hazards within its boundaries that have damaged, or that pose a significant threat of damage to site improvements within the developed -8- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 areas of the project. As used herein, the term "site improvements" means buildings and outbuildings, roads, sidewalks, improved paths, utilities, improved trails, swimming pools, tennis courts, gazebos, cabanas, geologic stabilization features or similar improvements. 6.3 Exceptions The intent of this Plan of Control is not to require or to create the expectation that the District will take action to address every threatened or actual geologic hazard. The District may decline to prevent, mitigate, abate or control geologic hazards under the following circumstances: 6.3.1 Isolated or Remote Slope Instability The District shall not have responsibility and may place a low priority on its responsibility to monitor, abate, mitigate or control slope instability that does not involve damage to or pose a significant threat to damage site improvements. 6.3.2 Single Property The District will not prevent, mitigate, abate or control geologic hazards which are limited in area to a single parcel of property unless the geologic hazard has damaged, or poses a significant threat of damage, to site improvements located on other property within the District boundaries. This exclusion does not apply to geologic hazards existing on common area property owned by the HOA or within open space owned by the District. 6.4 Vertical Movement or Creep Due to Shrink Swell or Settlement Vertical movement due to shrink -swell of expansive soils or settlement of fills is expected at the site as with many residential developments in the area. Damage to site improvements resulting from shrink swell or settlement of fills is not the responsibility of the GHAD. 6.5 Property Not Accepted The GHAD shall not have responsibility to repair damage, which is situated on a parcel of real property, which the GHAD has not accepted in accordance with Section 7.0. The GHAD, however, may monitor, abate, mitigate or control slope instability on a parcel of real property which the GHAD has not accepted in accordance with Section 7.0, provided that the GHAD responsibility on such parcel shall be limited to the extent necessary to address damage or a significant threat to damage site improvements on a GHAD accepted parcel. Not withstanding the above exceptions from District responsibility, the District may take any action necessary to prevent, mitigate, abate or control damage to property or site improvements for which, in the sole judgment of the District, the District would be legally responsible as a property owner. -9- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 6.5.1 Hazard(s) or Failure(s) Resulting From Negligence The District may decline to prevent, mitigate, abate or control geologic hazards or failures if, in the sole judgment of the District Manager in consultation with geologic or geotechnical professionals as the manager deems necessary, such hazards occur as the result of negligence of a property owner and /or a property owner's contractors, agents or employees in developing, grading, constructing, or maintaining any work on the subject property. 6.6 District Funding or Reimbursement for Damaged or Destroyed Structures or Site Improvements In the event a residence or any other private structure, site improvement or landscape feature is damaged or destroyed as a result of a geologic hazard, the District may fund or reimburse the property owner for the expenses necessary to repair or replace the damaged or destroyed structure, site improvement or landscaping. Unless otherwise authorized by the Board of Directors, the total dollar amount of the District funding or reimbursement paid to all property owners whose property is damaged by the geologic hazard may not exceed ten percent (10 %) of the total costs incurred by the District in actually mitigating, abating or controlling the geologic hazard that causes the damage. In the event the geologic hazard damaged or destroyed a structure, site improvement or landscaping which violated any provisions of the City Building Code or City Code at the time of its installation or improvement, the District may decline to provide any funding, or reimbursement to the property owner for repair or replacement of the damaged structure, improvement or landscaping. 6.7 No Reimbursement of Expenses Incurred by Property Owners The District will not be obligated to reimburse a property owner for expenses incurred for the prevention, mitigation, abatement, or control of a geologic hazard nor for reimbursement for damaged or destroyed structures or site improvements absent a written agreement between the property owner and the District to that effect, which agreement has been executed prior to the property owner incurring said expenses, and following an investigation conducted by the District. 6.8 Protected Wildlife Habitat The GHAD will not prevent, mitigate, abate or control isolated geologic hazards which are limited to mitigation areas and /or protected wildlife habitat unless the geologic hazard has damaged, or poses a significant threat of damage, to site improvements located on property within the GHAD boundaries. The GHAD, as land owner, is responsible for conservation activities as described in the Fallon Village GHAD Engineer's Report. -10- ENGEO Expect Excellence Braddock & Logan Group Plan of Control for Fallon Village GHAD 4663.101.001 May 8, 2007 Latest Revision July 3, 2013 7.0 FUNDING AND ACCEPTANCE OF RESPONSIBILITY BY THE DISTRICT 7.1 1. Activation of Assessment Ultimately an annual assessment shall be levied on all annexed residential or nonresidential parcels with habitable building areas within the Fallon Village development. The assessment shall be levied by the GHAD on each individual parcel beginning the first fiscal year following issuance of a building permit for that parcel. 7.2 2. Responsibility for GRAD Activities The party that, on the date each Final Map is recorded within the GHAD boundaries, owns the developable parcels shown on that Final Map, shall have the responsibility to perform all the activities of the GHAD on property within that Final Map. Such responsibility shall automatically transfer to the GHAD at 9:00 a.m. on the day exactly six years after the first residential building permit is issued by the City of Dublin provided that the items listed under item No. 3 in this section have been completed. This turn-over date may be extended at the sole discretion of the project developer provided that the assessments shall continue to be levied during the extension period and that notice of such extension is delivered to the GHAD Manager at least 30 days prior to the turn-over date. The petitioners for formation of the GHAD intend that the approximately six -year period between the levying of the GHAD assessment and the GHAD becoming responsible to perform activities on property within each Final Map will allow the District to accumulate reserve funds without incurring significant expenses. 7.3 3. Ownership of the Open Space Ownership of the open space will pass from the owner /developers to the District on, or approximately on the date the District commences its activities and becomes responsible for oversight of the actual physical maintenance of the open space as provided in this section. 7.4 4. Process for Transferring Responsibility for GRAD Activities After the Transfer Eligibility Date for parcel(s), the process for transferring responsibility for performing GHAD activities on such parcel(s) shall be as follows: (a) In the calendar year of the Transfer Eligibility Date or in any subsequent year, at its discretion, the developer may apply to the GHAD ( "Transfer Application ") to transfer the responsibility for performing GHAD Activities for parcel(s) to the District. (b) Within 45 days of receiving such notice, a representative of the GHAD shall verify that all the facilities for which the GHAD will have maintenance responsibility have been constructed and maintained according to the City- approved plans and specifications for ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 the individual improvements, and that such facilities are operational and in good working order. (c) Within 15 days of such inspection, the GHAD will send the developer a list ( "Punch list ") of all of the items that need to be constructed, repaired or otherwise modified in order to comply with the City- approved plans and specifications. (d) The developer will notify the GHAD when it has completed the items identified on the Punch list. (e) Within 30 days of receipt of such notice, the GHAD shall verify that all Punch list items have been completed and notify the developer that the District accepts responsibility for performing all future GHAD Activities on the parcel(s). As part of the transfer activities the developer of parcel(s) to be transferred will provide the GHAD, for its use, copies of the applicable geotechnical exploration reports, grading plans, corrective grading plans, improvement plans, field - verified geologic maps, as -built subdrain plans or other pertinent documents as requested by the GHAD. 8.0 GEOTECHNICAL TECHNIQUES FOR MITIGATION OF LANDSLIDE, SOIL CREEP AND EROSION HAZARDS 8.1 Landslide Mitigation for Existing Debris Flows and Landslides For existing debris flows and landslide areas, the following mitigation measures have been proposed and shown on the corrective grading plans. General landslide mitigation measures are shown below. -12- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 TABLE 8.1 -1 Selected District Mitiization and Monitorina Areas Bulk Grading LANDSLIDE Current Previous Location I I 1 1 Areas Potential District Maintenance Designation Designation Landslide 1 or Monitoring Observation of this area during periodic site monitoring events. Landslide material may Higher potential for corrective not be removed work in future if remaining L2 Not Labeled G2, Earthflow downslope of landslide debris experiences engineered fill slope. movement and impacts site improvements. See Section 8.0 for potential landslide mitigation techniques. Observation of this area during periodic site monitoring events. Landslide material may Higher potential for corrective not be removed work in future if remaining L3 Not Labeled G2, Earthflow downslope of landslide debris experiences engineered fill slope. movement and impacts site improvements. See Section 8.0 for potential landslide mitigation techniques. Observation of this area during periodic site monitoring events. Higher potential for corrective Offsite landslide work in future if remaining L7 R7 GI, Earthflow material will not be landslide debris experiences removed. movement and impacts site improvements. See Section 8.0 for potential landslide mitigation techniques. In the event that Landslide L7A experiences movement, drainage in the swale at the toe of the planned fill slope could be partially blocked. To avoid No removal of ponding of water and the L7A Not Labeled GI, Deep seated landslide material associated problems, it may be outside the civil limits necessary to implement measures of grading. to facilitate storm drainage in this area. We anticipate that this type of operation would become the responsibility of the proposed Geologic Hazard Abatement District (GRAD). 13- ENGEO Expect Excellence Braddock & Logan Group Plan of Control for Fallon Village GHAD 4663.101.001 May 8, 2007 Latest Revision July 3, 2013 8.2 General Landslide Mitigation The techniques the District may employ to prevent, mitigate or abate landsliding or adverse erosion damage might include, but are not necessarily limited to: • Removal of the unstable earth mass. • Stabilization (either partial or total) of the landslide by removal and replacement with compacted drained fill. • Construction of structures to retain or divert landslide material or sediment. • Construction of erosion control devices such as gabions, rip rap, geotextiles, or lined ditches. • Placement of drained engineered buttress fill. • Placement of subsurface drainage devices (e.g. underdrains, or horizontal drilled drains). -14- ENGEO Expect Excellence Bulk Grading LANDSLIDE Current I Location I I I 1 1' Potential District Maintenance Designation Designation Landslide 1 or Monitoring Activities Observation of this area during periodic site monitoring events. No removal of Higher potential for corrective landslide material work in future if remaining L7B Not Labeled G1, Deep seated outside the civil limits landslide debris experiences of grading. movement and impacts site improvements. See Section 8.0 for potential landslide mitigation techniques. Observation of this area during periodic site monitoring events. G2, (Lots and a Landslide material may Higher potential for corrective portion of Parcel not be removed work in future if remaining L 14 R -15 "E"), Rotational downslope of landslide debris experiences Slump engineered fill slope. movement and impacts site improvements. See Section 8.0 for potential landslide mitigation techniques. Offsite landslide L 16A R -27 G3, Earthflow material will not be removed. L24 R -34 Lots 829 -831, Earth Offsite portion of the flow ilandslide. 8.2 General Landslide Mitigation The techniques the District may employ to prevent, mitigate or abate landsliding or adverse erosion damage might include, but are not necessarily limited to: • Removal of the unstable earth mass. • Stabilization (either partial or total) of the landslide by removal and replacement with compacted drained fill. • Construction of structures to retain or divert landslide material or sediment. • Construction of erosion control devices such as gabions, rip rap, geotextiles, or lined ditches. • Placement of drained engineered buttress fill. • Placement of subsurface drainage devices (e.g. underdrains, or horizontal drilled drains). -14- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 • Slope correction (e.g. gradient change, biotechnical stabilization, and slope trimming or contouring). Construction of additional surface ditches and /or detention basins, silt fences, sediment traps, or backfill or erosion channels. Potential landslide and erosion hazards can often best be mitigated by controlling soil saturation and water runoff and by maintaining the surface and subsurface drainage system. Maintenance shall be provided for lined surface drainage ditches and drainage terraces including debris catchment structures or drop inlets. The impact of soil creep on site improvements is usually best mitigated by designing structures to resist the forces applied by the creeping soil, since soil creep movement on slopes is typically caused by conditions which are difficult to control on a larger scale, such as the wetting and drying of clays, the growth of roots, burrowing animals and by the downslope movement of saturated ground. Monitoring activities may include observation of saturated ground conditions and burrowing animal populations, which may be controlled by additional drainage or the removal of burrowing animals. 9.0 BIOTECHNICAL RECOMMENDATIONS FOR PREVENTION AND MITIGATION OF EXISTING OR POTENTIAL EROSION HAZARDS Fill slopes within the boundaries of the District are expected to be erodible as will cut slopes in bedrock; therefore, the maintenance of vegetative cover is especially important. Vegetation provides a protective role on soil and exposed rock. It absorbs the impact of raindrops, reduces the velocity of runoff and retards erosion. In many instances, adequate erosion protection for slopes can be accomplished with carefully selected and placed biological elements (plants) without the use of structures (e.g. brush layering and willow waddling). In other areas, biotechnical slope protection may involve the use of mechanical elements or structures in combination with biological elements to provide erosion control and help prevent small -scale slope failures. Locally, crib walls, welded -wire walls, gabion walls, rock walls, riprap and reinforced earth walls used in combination with carefully selected and planted vegetation can provide high quality slope protection. The vegetation may be planted on the slope above a low retaining structure or toe wall, or the interstices of the structure can be planted. -15- ENGEO Expect Excellence Braddock & Logan Group Plan of Control for Fallon Village GHAD 10.0 PRIORITY FOR DISTRICT FUNDED REPAIRS 4663.101.001 May 8, 2007 Latest Revision July 3, 2013 Emergency response and scheduled repair expenditures are to be prioritized by the General Manager, utilizing its discretion, based upon available funds, a prudent reserve and the approved operating budget. Should available funds not be sufficient to undertake all of the identified remedial and preventive stabilization measures; the expenditures shall be prioritized as follows in descending order of priority: A. The prevention, mitigation, abatement or control of geologic hazards that have either damaged or pose a significant threat of damage to residences, critical underground utilities or paved streets. B. The prevention, mitigation, abatement or control of geologic hazards that have either damaged or pose a significant threat of damage to private or community recreation facilities (e.g. pools, spas, etc.). C. The prevention, mitigation, abatement or control of geologic hazards that have either damaged or pose a significant threat of damage limited to loss of landscaping or other similar non - essential amenities. D. The prevention, mitigation, abatement or control of geologic hazards existing entirely on open -space property and which have neither damaged nor pose a significant threat of damage to any site improvements. 11.0 MAINTENANCE AND MONITORING SCHEDULE Geologic features and District- maintained facilities should be inspected on a regular basis. Budget permitting, inspections should be scheduled to occur a minimum of two times per year in normal years and three or more times per year in years of heavy rainfall. The inspections should be scheduled to take place in October, prior to the first significant rainfall; mid - winter as necessary during heavy rainfall years; and in early April at the end of the rainy season. The frequency of the inspections should be increased in years of higher than average rainfall intensity and /or recurrence. • A District Engineer and /or Geologist should inspect the lined surface of concrete -lined drainage ditches within the District boundaries on a regular schedule. If possible, inspections should be scheduled twice each year, budget permitting. One inspection should be in the fall prior to the onset of winter rains. The inspector should check for sedimentation, cracking or shifting of the concrete -lined ditches. Repairs and maintenance should be performed on a regular schedule. Excess silt or sediment in ditches should be removed and cracked or broken ditches should be patched or repaired as required before the beginning of the next rainy season. -16- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 • Several types of debris catchment structures are planned. Repairs and maintenance should be performed on a regular schedule. Excess debris should be removed to allow the structures to maintain adequate catchment area. • Subsurface drain outlets and horizontal drilled drain outlets, if any, should be inspected on a regular schedule. Water flowing from these outlets should be measured and recorded during each inspection. If possible, inspections should be scheduled twice each year, preferably in the fall and spring. Any suspicious interruption in flow should signal a need to unplug or clean by flushing the affected drain. • If installed, piezometers used to measure groundwater levels, or other instruments such as inclinometers and tiltmeters, should be monitored on a regular schedule. • Settlement monitoring devices, if any, should be monitored on a regular schedule. In the event of anomalous readings or excessive settlement, the monitoring frequency should be increased. • Inlets, outfalls or trash racks, if used, must be kept free of debris and spillways maintained. Attention should be given to plantings or other obstructions, which may interfere with access, by power equipment. • The bioretention facilities should be monitored and maintenance in accordance with the Operations and Maintenance Manual for Bioretention Facilities Tract 7586 at Fallon Village. A copy of this manual is provided in Appendix B. The District should review its inspection schedule annually and assess the effectiveness of its preventive maintenance program on a regular basis. District staff should prepare an annual report to the Board of Directors with recommendations for maintenance and /or repair projects. Consultants, if necessary, may be retained to undertake the needed studies. The District Engineer and /or Engineering Geologist retained by the District shall prepare an annual inspection report for presentation to the District Board of Directors. 12.0 OPEN SPACE OWNERSHIP AND MANAGEMENT Ownership, funding sources and maintenance responsibilities shall be as shown on following table. Parcels labels listed on the table below in quotation marks are those from the vesting tentative map. -17- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 TABLE 12.0 -1 Fallon Village Lona -Term Ownershit) and Management Matrix -18 - ENGEO Expect Excellence Tentative Acceptance Facility/Function Maintenance Entity 1 Date Or I Initial 1 L Monitoring Term I. Development Area A. Residential Lots Private Private 2013 Private B. Bioretention Cells (Parcels J, JJ, "EE" and "FF ") 1. Water Quality Facilities GHAD GHAD 2013 GHAD 2. Retaining Walls and GHAD GHAD 2013 GHAD Slopes 3. Landscaping HOA HOA GHAD C. Semi Public Parcel E Braddock and Braddock and Braddock and Logan Logan Logan D. Parcel KK HOA HOA HOA E. Park (Parcel "E) City of Dublin City of Dublin City of Dublin F. Park (Parcel O) City of Dublin City of City of Dublin Dublin Dublin G. School Site (Parcel F -1) Dublin Unified Unified Dublin Unified School District School School District District H. Parkways, Tree Planting HOA HOA City of Dublin Easements and Sidewalks L Multi -Use Trails and HOA HOA City of Dublin Collector Medians Braddock and J. Parcel B and "II" GHAD GHAD Logan (City of Dublin) II. Open Space K. Parcels A, C, D, E -1, K, P, `B ", "C ", "D" and "GG" including conservation GHAD GHAD 2013 GHAD easement funding starting in FY 2013/2014 L. Mitigation Pond (0.83 Land Trust Endowment GHAD Acres) -18 - ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 13.0 RIGHT-OF-ENTRY District officers, employees, consultants, contractors, agents, and representatives shall have the right to enter upon all lands within the District boundary, as shown on Exhibit B, for the purpose of performing the activities described in the Fallon Village Plan of Control. Such activities include, but are not limited to: (1) the inspection, maintenance and monitoring of site improvements including sedimentation basins, maintenance roads, deflection walls, drainage ditches, storm drains, outfalls and pipelines; (2) the monitoring, maintenance and repair of slopes, including repaired or partially repaired landslides; and (3) the management of erosion and geologic hazards within the open space areas shown on Exhibit A. Should the District need to access private residential lots to fulfill its duties under the Plan of Control, the District shall provide the affected landowner and /or resident with 72 hours advanced notice, unless in the reasonable judgment of the District, an emergency situation exists which makes immediate access necessary to protect the public health and safety, in which case no advanced notice is required, but the District shall inform the landowner and /or resident as soon as reasonably possible. The foregoing right -of -entry shall be recorded in the chain of title for all residential parcels and common area lots, and it shall be included in all Covenants, Conditions and Restrictions (CC &Rs) and homebuyer disclosure statements prepared for parcels within the District boundary. -19- ENGEO Expect Excellence Braddock & Logan Group 4663.101.001 Plan of Control for Fallon Village GHAD May 8, 2007 Latest Revision July 3, 2013 REFERENCES California State of, Division of Mines and Geology (CDMG), 1982, Earthquake Fault Hazard Zones Map, Livermore Quadrangle (previously named Special Studies Zones Map). Crane, R., 1996, Geologic Map of the Livermore 7.5- Minute Quadrangle. Dibblee, T. W., Jr., 1980, Preliminary Geologic Map of the Livermore Quadrangle, Alameda and Contra Costa Counties, California, Open File Report 80 -533. Dublin, City of, Resolution 05 -61 including Conditions of Approval for Tract 7586, APNs 985- 0028 -002 and 905- 0002 -003, Dublin, California. Dublin, City of, Development Agreement between the City of Dublin and Dublin RE Investors, L.L.C. for the Fallon Village Project, February 1, 2006. ENGEO, Response to Review Comments, Fallon Village, Dublin, California, May 31, 2006, Proj ect No. 4663.1.010.01. ENGEO, Phase 1 — Corrective Grading Plans, Fallon Village, Dublin, California, March 14, 2006, Project No. 4663.1.009.01. ENGEO, Preliminary Geotechnical Exploration, East Dublin Properties, Dublin, California, February 23, 2003, Revised December 17, 2004, Project No. 4663.1.004.01. ENGEO, Geotechnical Corrective Grading Plan, Fallon Village, Dublin, California, May 2006, Proj ect No. 4663.1.009.01. ENGEO, Review of Preliminary Grading Plans, East Dublin Properties, Tract 7586, Dublin, California, February 8, 2005, Project No. 4663.1.004.01. Graymer, R. W., Jones, D. L. and Brabb, E. E., 1994, Preliminary Geologic Map Emphasizing Bedrock Formations in Alameda County, California: OFR 96 -252. MacKay and Somps, Tentative Map, Fallon Village, Dublin, California, December 5, 2005. MacKay and Somps, Phase 1 Bulk Grading Plan, Tract 7586 - Fallon Village, Dublin, California, Project No. 19319 -1 June 2006. Nilsen, T. H., 1975, Preliminary Photointerpretation Map of Landslide and Other Surficial Deposits of the Livermore 7'/z Quadrangle, Contra Costa County, California, USGS 75- 277 -26. ENGEO Expect Excellence APPENDIX A Exhibits and Figures Exhibit A District Boundary Map Exhibit B District Boundary Description Figure 1 Geotechnical Corrective Grading Plan Figure 2 Geologic Map Figure 3 Open Space and Improvements Ownership/Maintenance Plan . �' J.-.. . �6 Y .. • .. I.. �. A P P E N D I X FMIN 7. 2 5., I R. 1 E. NOTE: BEARINGS AND DISTANCES M Dj9 M WITHOUT AN ASTERISK( *) WERE TAKEN 22 28 ACACIA PARTNERS FROM RECORD OF SURVEY NO. 1005 - - -' - -- 27 i 26 SERIES No. 2005- -037860 ACACIA PARTNERS i APN 905- 0003 - 014-03 SERIES No. 2005 - 037860 ' APN 985 -0028 -001 ~i - POB ________ N89 °40 ®26 "W 1485.76' i ®PARCEL 1 ------- -- ---- __ -_- ----------------------- -r- - -- -� , i PARCEL 2 h� N00009'1 35.961' W 1 1/4 CORNER OF PM 8327 �� ® ®' SECTIONS 26 & 27 I PARCEL 'D' co MUEHLHAUSER D.S.R.S.D.I tK ® PM 9208 �1 SERIES No. 2002 - 090,80 I ____♦ :_---___- APN 905 -- 0003 --012 �. BI{292 bi PG16 -17 w i PARCEL F 313.91± AC. ®: co *NOTE: BEARINGS AND DISTANCES WITH ' TRACT 72533 11 PARCEL A o 1 Bl<.263 M P.73 -78 AN ASTERISK( *) FOR THE NW 1/4 OF No. __ __ °z SECTION 35 WERE TAKEN FROM SERIES No. _-.-- RECORD OF SURVEY NO. 1675* �` 14.66± AC.� 1 27 26 *N88 °43'28 "W 2640.61'* D U B L I N ' 1 PARCEL '0' S -- _® ®® RANCH % o w 34 POB PARCEL 2 - - -- ca � \ CL r ' DUBLIN INVESTORS, LLC ' ► �, , „ SERIES No. 2003 - 108250 * a J ► w r _ 7 I C? I �`! ROS NO. 1675 I co - �� BK25 R.O.S. PG31 -32 � 1 a `w° APN 905 -0002 -003 N1 T L� C: 159.54± AC. w I [if �, ® oa w I2„ w ls__ -_.N b Ln c"I rr \ PARCEL 'C' ' NW 1/4 SECTION 35 ®-i PARCEL 'A' o ( o "> co z z z T. 2 S. R. 1 E. ° I L �c `� , M.D.O. A M. L N89°51'52 "W 2651.00' *N88 °43'19 "W 2631.95'* PARCELS 3 & 4 ®® m_ m_ SEE PAGE 3 FIRST AMERICAN TITLE i CROAK GUARANTEE CO. i SERIES No. 79- 229985 SERIES No. 1998- 3388140 APN 905- 0002 -002 � APN 905 -0027 -006 ; APN 905 - 0002- 002 -01 APN 965 -0027 -007 LEGEND: 0' 500' 1000' 2000' 1 E!!!!!!!i --- Qp 1M1 LIMITS OF FALLON VILLAGE GHO SEE EXHIBIT B FOR DESCTIPTION CITY OF DUBLIN COUNTY OF ALAMEDA CALIFORNIA DRAWN ( DATE I SCALE I JOB NO. AMB 03 -21 -07 1" =1000' 19149 -10 3 -23 -2007 16:41:06 mmcclellon P: \19149 \legols \GRAD- legols- overoll \PLATEXHIBITdwg � ~� ______ � PARCEL F R=291.02' D=49058'40"---,,., '0" ' '/\— N71020'52"E 82,06' TRACT 7253 L=253.85' I I ---~ ^ | N10057'46"VY 95D3' N21032'10"W 88,40' N71006'39"W 99.04' N16041'10"E 51.40'— N17050'10"E 64.191-1 N00044'30"W 120,97'' D U D L| N J" ' PARCEL R A N C H N10047'1 1"W 28883 ` � `^ SERIES No. ~- N49041'57"E 122.85' PARCEL V N58052'28"E 1119.88' N69008'47"E 31.73' goo N53002'51"E 195.67 N90000'00"E 58.47' N75022'09"W 45.89' D= 19007'43" R=OO§OD' D J2,J1'O5� _-_-~_ - 40.06 L=ou2.Vo / \' \ � \ � ` 8"57]4'E(R ` ' -" �-- '52, \ N3O"000OVY 180O5'-_ � |� ` N7O"52'17"YY D.55�^—� .J�' R=OO.00' D=11«47'55"' YY 33.48' L= 16.47' 4---NO3049'18"E 159.00' '-- N03058'13"W 101.75' N10041'42"W 61.76' 0' 250 500^ 1000 wmmmmmmmmmw EXHIBIT "A" PAGE 2 OF 3 LIMITS OF FALLON VILIAGE GEM SEE EXHIBIT B FOR DESCTIPTION CITY OF DUBLIN COUNTY OF ALAMEDA CALIFORNIA N22055'58^YV 83.13' N3304570"W 128.91' N89051'52"VV 2651.00' ' |���ND �����."�^ BOUNDARY LINE MAGUY&SOMPS CIVIL ENGINEERING* LAND PLANNING*LAND SURVEYING Pleasanton, CA (925) — 225-0690 F JOB NO. DRAWN DATE SCAI-E J-2J-2007 16:41:06 mmcckellvn /�\/y/49\leyols\(HAD-legols-overoll\PLA7E/HIBY[dwg CITY OF DUBLIN PARKSITE PARCEL 8 TRACT 7281 (277 M 8288) N60015'10" E 31.43' N60*15'10 f E 8.38' PARCEL 4 REMAINDER OF PARCEL 18 TRACT 7281 (277 M 82-88) 60' EXISTING RIGHT OF WAY EASEMENT FOR FALLON ROAD. AREAS: PARCEL 3=4,645± SF. PARCEL 4=10,082± SF. LEGEND: POB POINT OF BEGINNING ► ► ► ► NO, 0 'A' X01 61, . 0 0 ki R=237.00' A=9020'51 L=38.67' 1 ► I I SCALE: 1"=60' / r ► /it I , No MIBIT 99A91 PAGE 3 OF 3 MACKKAY & SOMPS LIMITS O F F ALLON VILLAGE GHO CIVIL ENGINEERING* LAND PLANNINGoLAND SURVEYING SEE EXHIBIT 8 FOR DESCTIPTION Pleasanton, CA (925) — 225-0690 DRAWN I DATE SCALE JOB N 1. CITY OF DUBLIN, COUNTY OF ALAMEDA, CALIFORNIA I JTM/AMB---1 03-21-07 1"=60' 1 19149-11 3-23 -2007 16:48:21 mmcclellon P.- �19149�legols\GHAD—legols—overcll\GHAOPARCELS1&2.dwg R=800.55' A=3030'34" L=49.04' ► c, POB PARCEL 3 & PARCEL 4 ► ► ► ► ► ► No MIBIT 99A91 PAGE 3 OF 3 MACKKAY & SOMPS LIMITS O F F ALLON VILLAGE GHO CIVIL ENGINEERING* LAND PLANNINGoLAND SURVEYING SEE EXHIBIT 8 FOR DESCTIPTION Pleasanton, CA (925) — 225-0690 DRAWN I DATE SCALE JOB N 1. CITY OF DUBLIN, COUNTY OF ALAMEDA, CALIFORNIA I JTM/AMB---1 03-21-07 1"=60' 1 19149-11 3-23 -2007 16:48:21 mmcclellon P.- �19149�legols\GHAD—legols—overcll\GHAOPARCELS1&2.dwg lYl49-lV 3/23/00 AB Page lof5 ALL THAT CERTAIN REAL PROPERTY SITUATED ON CITY OF DUBLIN, COUNTY OF ALAMEDA, STATE OP CALIFORNIA, BEING ALL UPTHE NORTHWEST 0LD\RTEDOFSECTION 35 AS DESCRIBED IN S6KIBG No. 2UO3 |O8%50` /\LAMBD/\ COUNTY RECORDS, AS WELL AS /\ PORTION OFTHE SOUTH HALF OF SECTION 27 AND A PORTION OF THE NORTH HALF OP SECTION 34, TOWNSHIP 2 SOUTH, RANGE l EAST, K40DNT D}&8[0 BASE AND MERIDIAN, MORE PARTICULARLY DESCRIBED A0FOLLOWS: BEGINNING AT THE COMMON QUARTER CORNER OF SECTIONS 26 AND 27/\GSHOWN ON PARCEL MAP 9208, RECORDED IN BOOK 292 OF MAPS PAGES 16-17, &lAJNRDA COUNTY RECORDS; THENCE ALONG THE SECTION LINE 0P SECTIONS 26 AND 27. SAID SECTION LINE BEING &LSDTFE WESTERLY LINE OFTHE MU8BL|IA USER TRUST, SERIES No. 2OO2-O9748O` /\L&MBD& COUNTY RECORDS, SOUTH 00"48'41" WEST 2`642.65 ROEl` TO THE COMMON SECTION CORNER OF SECTIONS 26,27,34, AND 35; THENCE ALONG THE COMMON SECTION LINE OF SECTIONS 34 AND 35, SAID SECTION LINE BEING ALSO THE WESTERLY LINE OF DUBLIN INVESTORS, LDC, SERIES No. 2003 lO8250` /\LADdBD/\ COUNTY RECORDS, SOUTH 00-44'28" WEST 2.635.93 FEET, IO THE COMMON QUARTER CORNER OF SECTIONS 34 AND 35; THENCE ALONG THE, EAST-WEST QUARTER SECTION LINE BNIBBJN8 SECTION 34, SAID EAST-WEST 0D/kKl6B SECTION LINE BEING ALSO THE NORTHERLY LINE OF FIRST AMERICAN TITLE GUARANTEE CO., 8BDIBS No. 1998-388140, /\iAMED/\ COUNTY RECORDS, NORTH 89"5l'52" WEST 2'651.00FEET; THENCE LEAVING SAID EAST-WEST QUARTER SECTION LINE ALONG THE WESTERLY LINES 0F PARCEL "&~CF SAID PARCEL MAP 92O0, THE FOLLOWING SIX (6)COURSES: |) NORTH 33"45'20"WEST 128.91 FEET; 2) NORTH 22"56'5O"YV2GT83.|3FEET; 3) NORTH l8"4|'42" WEST 6).76FEET; 4) NORTH 03"58'l3"WEST 101,75 FEET; 5) NORTH 03"4V'l8" EAST i59.UOFEET; 6) NORTH 30"35'37" WEST 33.48FEET; THENCE LEAVING SAID WESTERLY LINE OFP/\RCEL^'/\" ALONG THE WESTERLY LINE OF PARCEL ^�A", PER No. LL&___-___8BklB8 No. -/\L&MDD/\ COUNTY D£CORO8T8G F0LLO9/lNGTDID7Y-Y4INB(JV) COURSES: |) SOUTH 66"40'5O" WEST 92.39 FEET T0/\ NON-TANGENT CURVE; 2) THENCE ALONG SAID NON-TANGENT CURVE TO THE LEFT, FROM WHICH THE RADIUS POINT BEARS SOUTH 66"4O'50" WEST, HAVING A RADIUS 0Fl,lO0.00 FEET; THROUGH /\ CENTRAL &N(fLB OF 05"19'52". FOR ANARC DISTANCE OF 102.35 FEET; 19149-10 3/23/2007 AB Page 2 ol'5 3) NORTH 28-39'03" WEST 58.57 FEET TO A POINT OF CURVATURE; 4) THENCE ALONG A TANGENT CURVE TO THE RIGHT HAVING A RADIUS 01, 80.00 FEET, THROUGH A CENTRAL ANGLE OF 11047'55", FOR AN ARC DISTANCE OF 16.47 FEET; TO A POINT OF REVERSE CURVATURE; 5) THENCE ALONG SAID REVERSE CURVE TO THE LEFT HAVING A RADIUS OF 150.00 FEET, THROUGH A CENTRAL ANGLE OF 54001'09", FOR AN ARC DISTANCE OF 141.42 FEET; 6) NORTH 70-5217" WEST 6.55 FEET TO A POINT OF CURVATURE; 7) THENCE ALONG ATANGENT CURVE TO THE LEFT HAVING A RADIUS OF 120.00 FEET, THROUGH A CENTRAL ANGLE OF 1900743", FOR AN ARC DISTANCE OF 40.06 FEET; 8) NORTH 90-00'00" WEST 189.85 FEET TO A NON-TANGENT CURVE; 9) THENCE ALONG SAID NON-TANGENT CURVE TOTHE LEFT, FROM WHICH THE RADIUS POINT BEARS SOUTH 89-57'24" WEST, HAVING A RADIUS OF' 886,00 FEET; THROUGH A CENTRAL ANGLE OF 32-3 1'05", FOR AN ARC DISTANCE OF 502.85 FEET; 10) NORTH 53-02'51" EAST 195.67 FEET; 11) NORTH 28-07'47" EAST 284.00 FEET; 12) NORTH 49 °41'57" EAST 122.85 FEET; TO A POINT OF CURVATURE; 13) THENCE ALONG A TANGENT CURVE TO THE RIGHT HAVING A RADIUS OF 42.00 FEET, I THROUGH A CENTRAL ANGLE OF 59026'40", FOR AN ARC DISTANCE OF 43.58 FEET; 14) SOUTH 70 °51'23" EAST 49.05 FEET; 15) SOUTH 75022'09" EAST 45.89 FEET; 16) NORTH 90-00'00" EAST 58.47 FEET; 17) NORTH 69-08'47" EAST 31.73 FEET; 18) NORTH 58-52'28" EAST 119.88 FEET; 19) NORTH 10 °47'11" WEST 268.63 FEET; 20) NORTH 07-19'39" WEST 250.02 FEET; 21) NORTH 20-43'33" WEST 90.89 FEET; 22) NORTH 12041'35" WEST 30.86 FEET; 23) NORTH 00-44'30" WEST 120.97 FEET; 24) NORTH 17'41'12" WEST 147.19 FEET; 25) NORTH 00-19'22" WEST 106.46 FEET; 26) NORTH 17-5010" EAST 64.19 FEET; J'Al 9149lega I s\(j I I AD-legals-overaffiLF"G A L-OVERALLcloc 19149 -10 3/23/2007 AB Page 3 of 5 27) NORTH 02 °18'30" EAST 81.36 FEET; 28) NORTH 16 °41'10° EAST 51.40 FEET; 29) NORTH 37 °18'42" EAST 65.35 FEET; 30) NORTH 21-23'28" EAST 200.71 FEET; 31) NORTH 71 °06'39" WEST 99.04 FEET; 32) NORTH 50 °42'23" WEST 48.07 FEET; 33) NORTH 21 °32'10" WEST 88.40 FEET; 34) NORTH 14 °25'13" WEST 134.28 FEET; 35) NORTH 10 °57'46" WEST 96.03 FEET; 36) NORTH 00 °39'24" EAST 140.60 FEET TO A POINT OF CURVATURE; 37) THENCE ALONG A TANGENT CURVE TO THE RIGHT HAVING A RADIUS OF 291.02 FEET, THROUGH A CENTRAL ANGLE OF 49 °58'40 ", FOR AN ARC DISTANCE OF 253.85 FEET; 38) NORTH 71 °20'52" EAST 82.06 FEET; 39) SOUTH 52 °39'14" EAST 39.69 FEET; TO THE WESTERLY LINE OF PARCEL "D" OF SAID PARCEL MAP 9208; THENCE ALONG SAID WESTERLY LINE OF PARCEL "D" THE FOLLOWING TWO (2) COURSES: 1) NORTH 48 °46'28" EAST 1,739.56 FEET; 2) NORTH 00 °09'11" WEST 235.96 FEET TO A POINT ON THE QUARTER SECTION LINE OF SECTION 27, SAID SECTION LINE BEING ALSO THE SOUTHERLY LINE OF ACACIA PARTNERS, SERIES No. 2005- 037868, ALAMEDA COUNTY RECORDS, AND THE NORTHERLY LINE OF SAID PARCEL "D"; THENCE ALONG SAID QUARTER SECTION LINE SOUTH 89 °40'26" EAST 1,485.76 FEET; TO THE POINT OF BEGINNING. CONTAINING 328.57 ACRES, MORE OR LESS. PARCEL2 BEGINNING AT THE COMMON CORNER OF SECTIONS 26, 27, 34, AND 35 THENCE ALONG THE SECTION LINE OF SECTIONS 26 AND 35, SAID SECTION LINE ALSO BEING THE SOUTHERLY LINE OF THE MUEHLHAUSER TRUST, RECORDED IN SERIES No. 2002 - 097480, ALAMEDA COUNTY RECORDS, SOU'T'H 88 °43'28" EAST 2640.61 FEET TO THE NORTH QUARTER CORNER OF SECTION 35; THENCE ALONG THE NORTH -SOUTH QUARTER SECTION LINE OF SECTION 35, SAID QUARTER SECTION LINE BEING ALSO THE WESTERLY LINE OF ACACIA PARTNERS, RECORDED IN SERIES No. 2005- 037867, ALAMEDA COUNTY RECORDS, SOUTH 00 °55'27" WEST 2636.26 FEET TO THE CENTER QUARTER CORNER OF SECTION 35; PA] 9149 \legals \GRAD - legals - overall \LEGAL- OVERALL.doc 19149-10 3/23/2007 AB Page 4 of 5 THENCE ALONG THE EAST-WEST QUARTER SECTION LINE OF SECTION 35, SAID QUARTER SECTION LINE BEING ALSO THE NORTHERLY LINE OF CROAK, RECORDED IN SERIES No. 79- 229985,ALAMEDA COUNTY RECORDS; NORTH 88'43'19" WEST 2631.95 FEET TO THE WEST QUARTER CORNER OF SECTION AND 35; THENCE ALONG THE COMMON SECTION LINE OF SECTIONS 34 AND 35, BEING ALSO THE EASTERLY LINE OF PARCELS "C" AND "D" OF PARCEL MAP 9208, BOOK 292 OF MAPS PAGES 16-17, ALAMEDA COUNTY RECORDS; NORTH 00'44'09" EAST 2636.21 FEET TO THE POINT OF BEGINNING. BEARINGS, DISTANCES AND AREA CALCULATION ARE BASED ON RECORD OF SURVEY No. 1675, BOOK 25 RECORD OF SURVEYS PAGES 31-32 ALAMEDA COUNTY RECORDS. CONTAINING 159.54 ACRES, MORE OR LESS. PARCEL3 ALL THAT CERTAIN REAL PROPERTY SITUATED IN THE CITY OF DUBLIN, COUNTY OF ALAMEDA, STATE OF CALIFORNIA, BEING A PORTION OF FALLON ROAD AS SHOWN ON TRACT MAP 7281, FILED SEPTEMBER 3, 2004 IN BOOK 277 OF MAPS PAGES 82-88, AND TRACT MAP 7142 FILED AUGUST 21, 2001 IN BOOK 261 OF MAPS PAGES 5-10, ALAMEDA COUNTY RECORDS, MORE PARTICULARLY DESCRIBED AS FOLLOWS: BEGINNING AT THE NORTHEAST CORNER OF PARCEL 18 AS SHOWN ON SAID TRACT MAP 7281, THENCE ALONG THE NORTHERLY LINE OF SAID PARCEL 18, COINCIDENT WITH THE SOUTHERLY LINE OF FALLON ROAD, ALONG A CURVE TO THE LEFT WITH A RADIUS OF 1360.00 FEET, FROM WHICH THE RADIUS POINT BEARS SOUTH 43°11'36" WEST, THROUGH A CENTRAL ANGLE OF 04006'24", FOR AN ARC DISTANCE OF 97.48 FEET; THENCE LEAVING SAID NORTHERLY LINE, AND ENTERING SAID FALLON ROAD, THE FOLLOWING 4 COURSES: 1) NORTH 60°15'10" EAST 31.43 FEET; 2) ALONG A TANGENT CURVE TO THE LEFT WITH A RADIUS OF 466.00 FEET, THROUGH A CENTRAL ANGLE OF 09005'56" FOR AN ARC DISTANCE OF 74.00 FEET TO THE CENTERLINE OF OLD FALLON ROAD, A 60 FOOT RIGHT OF WAY; 3) THENCE ALONG SAID CENTERLINE ALONG A NON TANGENT CURVE TO THE LEFT WITH A RADIUS OF 800.55 FEET, FROM WHICH THE RADIUS POINT BEARS SOUTH 80-09'45" EAST, THROUGH A CENTRAL ANGLE OF 03-30'34", FOR AN ARC DISTANCE OF 49.04 FEET; 4) THENCE SOUTH 06-19'16" WEST 73.27 FEET TO THE POINT OF BEGINNING. CONTAINING 4,645 SQUARE FEET MORE OR LESS. PARCEL4 ALL THAT CERTAIN REAL PROPERTY SITUATED IN CITY OF DUBLIN, COUNTY OF ALAMEDA, STATE OF CALIFORNIA, BEING PARCEL 18 AS SHOWN ON TRACT MAP 7281, RECORDED IN BOOK 277 OF MAPS PAGES 82-88, ALAMEDA COUNTY RECORDS, EXCEPTING FROM SAID PARCEL 18 THAT PORTION CONVEYED TO THE CITY OF DUBLIN AS DESCRIBED PAJ 9149legals\G I 1AD-legals-overalITEG A L-OVERALL.doc 19149-10 3/23/2007 AB Page 5 of 5 IN SERIES No. ALAMEDA COUNTY RECORDS, MORE PARTICULARLY DESCRIBED AS FOLLOWS: BEGINNING AT THE NORTHEAST CORNER OF PARCEL 18 AS SHOWN ON SAID TRACT MAP 7281, THENCE ALONG THE NORTHERLY LINE OF SAID PARCEL 18, COINCIDENT WITH THE SOUTHERLY LINE OF FALLON ROAD, ALONG A CURVE TO THE LEFT WITH A RADIUS OF 1360.00 FEET, FROM WHICH THE RADIUS POINT BEARS SOUTH 43011'36" WEST, THROUGH A CENTRAL ANGLE OF 04006'24", FOR AN ARC DISTANCE OF 97.48 FEET, TO THE EASTERLY LINE OF THE PORTION CONVEYED TO THE CITY OF DUBLIN IN SERIES No. ALAMEDA COUNTY RECORDS; THENCE LEAVING SAID NORTHERLY LINE AND ALONG SAID EASTERLY LINE THE FOLLOWING FOUR (4) COURSES: 1) SOUTH 60-15'10" WEST 8,38 FEET; TO A TANGENT CURVE; 2) ALONG SAID TANGENT CURVE TO THE LEFT HAVING A RADIUS OF 28.00 FEET, THROUGH A CENTRAL ANGLE OF 85049'59"; FOR AN ARC DISTANCE OF 41.95 FEET; TO A POINT OF REVERSE CURVATURE; 3) ALONG SAID REVERSE CURVE TO THE RIGHT HAVING A RADIUS OF 1,073.00 FEET, THROUGH A CENTRAL ANGLE OF 09 °4I' 1 4", FOR AN ARC DISTANCE OF 181.42 FEET; TO A POINT OF COMPOUND CURVATURE; 4) ALONG SAID COMPOUND CURVE TO THE RIGHT HAVING A RADIUS OF 237.00 FEET, THROUGH A CENTRAL ANGLE OF 09-20'51", FOR AN ARC DISTANCE OF 38.67 FEET, TO THE EASTERLY LINE OF SAID PARCEL 18; THENCE ALONG SAID EASTERLY LINE NORTH 06019'16" EAST 184.91 FEET,, O THE POINT OF BEGINNING. CONTAINING 10,082 SQUARE FEET, MORE OR LESS SEE EXHIBIT A FOR DISTRICT BOUNDARY MAP END OF DESCRIPTION. of sw MACM1 & ASOmps CIVIL ENGINEERING* LAND PLANNINGGLAND SURVEYING 5142 Franklin Drive Suite B, Pleasanton, CA. 94588-3355 (925) 225-0690 P:\19149legals\GHAD-legals-overall\[,,EGAI--OVERALI-,doc IQTt It EXPLANATION Qdf FILL ` APPROXIMATE LOCATION OF TEST PIT SHALLOW EARTHFLOW /DEBRIS FL0W(5- 15'THICK) QOl ALLUVIUM 4#,TP -2 APPROXIMATE LOCATION OF TEST PIT (ENGE02000) MODERATELY DEEP EARTHFLOW /ROTATIONAL SLUMP(15- 30'THICK) QC COLLUVIUM ` DEEP- SEATED ROTATIONAL BEDROCK SLUMP(30'- 60'THICK) QTf TASSA7ARA FORMATION j BEDDING TREND FROM AERIAL PHOTOGRAPHY 55 R -34 LANDSLIDE DESIGNATION � STRIKE AND DIP OF BEDDING B -�$ APPROXIMATE LOCATION OF BORING (ENGEO, 2002) --4,45 STRIKE AND DIP OF SHEER PLANE — - — PROPERTY BOUNDARY C -3 0 - - } - - ANTICLINE APPROXIMATE LOCATION OF CORED TEST 1 BORING (ENGEO, 2(02) B -3J., - - + -- SYNCLINE APPROXIMATE LOCATION OF BORING (ENGEO, 2000) FAULT (r3 (�) APPROXIMATE LOCATION OF CORED TEST BORING (ENGEO, 2000) 0 400 N o 200 BASE MAP SOURCE: ENGEO, INC., GEOTECHNICAL EXPLORATION REPORT, EASE OUBUN PROPERTIES FEBRUARY 2003 E GEOLOGIC MAP eeae — 4663 1010.01 amuxarvo FALCON VILLAGE GHAD 'la MAY 2017 DUBLIN, CALIFORNIA e5': SRP 3 1 ` /' •` �'/ ��� PARCD E -1 AM Rlz I• � I r ,,F, Pnwn_L r 1 ! �A',EL i En- XT0 PAK -L E -, u PA.�cEL. B CEd�I�JC IO –EE1 1 � � � pFEL E y / • , A 1 „ � � BIO– – I 1L Pae nwlai u: PVC -L � P:,RC1 "JJ' \ 11 LEGEND: PARCEL "X" PARCEL NAMES IN QUOTES CORRESPOND TO TENTATIVE MAP 7588 PARCEL NAMES. PARL�EL H PARCEL NAMES WITHOUT QUOTES CORRESPOND TO FINAL MAP PARCELS (PER FM 7853, 7854, AND 7855). —x —_ — FIRE I OPEN SPACE FENCING TO BE MAINTAINED BY GEOLOGIC HAZARDS ABATEMENT DISTRICT. LANDS AND IMPROVEMENTS TO BE OWNED BY CITY OF DUBLIN WITH MASTER HOMEOWNERS ASSOCIATION - MAINTAINING PARKWAY STRIP LANDSCAPING AND TREE PLANTING AND HOMEOWNER OR MASTER HOMEOWNERS ASSOCIATION MAINTAINING SIDEWALK. LANDS AND IMPROVEMENTS TO BE OWNED AND MAINTAINED BY THE CITY OF DUBLIN (PARKS AND COLLECTOR - MEDIANS). COLLECTOR MEDIANS TO BE MAINTAINED VIA THE CITY OF DUBLIN LANDSCAPE MAINTENANCE ASSESSMENT DISTRICT 99-1. LAND AND IMPROVEMENTS TO BE OWNED AND MAINTAINED BY DUBLIN UNIFIED SCHOOL DISTRICT (DUSDI -LANDS AND IMPROVEMENTS TO BE OWNED AND MAINTAINED BY MASTER HOMEOWNERS ASSOCIATION, WITH EXCEPTION OF PUBLIC UTILITIES. (0.83 ±AC.) LANDS TO BE OWNED BY GEOLOGIC HAZARDS ABATEMENT DISTRICT, AND MAINTAINED BY A LAND TRUST. CULVERT FOR CORRIDOR CROSSING WILL BE OWNED AND MAINTAINED BY THE CITY OF DUBLIN. (226.71 AC.) LANDS AND IMPROVEMENTS TO BE OWNED AND MAINTAINED BY A GEOLOGIC HAZARDS ABATEMENT DISTRICT. LANDS TO BE OWNED BY BRADDOCK AND LOOM AND LANDSIIMPROVEMENTS MAINTAINED BY GEOLOGIC HAZARDS ABATEMENT DISTRICT AND DEDICATED TO THE CITY IN THE FUTURE FOR CITY OWNERSHIP AND MAINTENANCE FOR PUBLIC ROADS. A N BASE MAP SOURCE: MACKAY & SOMPS 0 700 E OPEN SPACE AND IMPROVEMENTS rao�ecrNo.: 4663.1.010.01 Rc mExo 0 Meze 350 OWNERSHIP / MAINTENANCE PLAN nn�e; MAY 2007 I N c 0 R P 0 R A T E D FALLON VILLAGE GHAD EXCELLEW—CE SINCE DUBLIN, CALIFORNIA DxAwNSx: SRP Ja By: EH ORIGINAL FIGURE PRINTU 11 COLOR APPENDIX B Operation and Maintenance Manual for Bioretention Facilities Tract 7586 at Fallon Village, Alameda County, California ENGEO Project No. 4663.1.006.04 December 5, 2006, Revised February 8, 2007 A P P E N D I X ' � c ';e V .• a �'� � Lp'- s • .'t a OPERATIONS AND MAINTENANCE MANUAL FOR BIORETENTION FACILITIES TRACT 7586 AT FALLON VILLAGE ALAMEDA COUNTY, CALIFORNIA PREPARED FOR BRADDOCK & LOGAN SERVICES, INC. DANVILLE, CALIFORNIA PREPARED BY ENGEO INCORPORATED PROJECT NO. 4663.1.006.04 DECEMBER 5, 2006 REVISED FEBRUARY 8, 2007 COPYRIGHT © 2007 BY ENGEO INCORPORATED. THIS DOCUMENT MAY NOT BE REPRODUCED IN WHOLE OR IN PART BY ANY MEANS WHATSOEVER, NOR MAY IT BE QUOTED OR EXCERPTED WITHOUT THE EXPRESS WRITTEN CONSENT OF ENGEO INCORPORATED. OPERATIONS AND MAINTENANCE MANUAL FOR BIORETENTION FACILITIES TRACT 7586 AT FALLON VILLAGE ALAMEDA COUNTY CALIFORNIA TABLE OF CONTENTS ENGEO INCORPORATED Page 1.0 INTRODUCTION .............................................................................. ............................... 1 1.1 General Policy and Goals ................................................................. ............................... 1 2.0 FACILITY DESCRIPTIONS ........................................................... ............................... 3 2.1 Bioretention Facilities ...................................................................... ............................... 3 3.0 FACILITY OPERATIONS AND MAINTENANCE ..................... ............................... 4 3.1 Landscape Maintenance/Plant Replacement .................................... ............................... 6 3.2 Debris Control .................................................................................. ............................... 7 3.3 Drainage and Filter Medium Monitoring and Maintenance ............ ............................... 7 3.4 Access Road Monitoring ................................................................ ............................... 10 4.0 MONITORING AND MAINTENANCE SCHEDULE ................ ............................... 11 BIORETENTION FACILITY MONITORING REPORT FORM REFERENCES FIGURES IMPROVEMENT PLANS FOR BIORETENTION CELLS 4663.1.006.04 December 5, 2006 Revised February 8, 2007 ENGEO INCORPORATED 1.0 INTRODUCTION As part of State requirements for obtaining a Clean Water Act Section 401 Water Quality Certification and addressing Alameda County requirements for meeting the NPDES Municipal Stormwater Permit, several bioretention facilities have been designed for implementation at Tract 7586 of Fallon Village (the Project). The goal of this document is to provide the reader with an understanding of how the facilities are designed to operate and to describe a maintenance program that should provide for optimum function of the facilities. This document is required to meet Condition of Approval No. 9 as stated in the Water Quality Certification for the Fallon Village Project from the San Francisco Regional Water Quality Control Board ( RWQCB), dated August 7, 2006. It is anticipated that the facilities will not require extensive maintenance; however, routine monitoring and minor maintenance is necessary since the facilities are part of the Project's storm drain system. 1.1 General Policy and Goals This draft Operations and Maintenance Manual (OMM) is based on the requirements of both the County National Pollution Discharge Elimination System ( NPDES) permit, and the RWQCB Water Quality Certification Condition No. 9. The subject water quality facilities should be maintained with a focus on providing the services needed to accomplish drainage and water quality goals, performance standards and priorities as outlined in this document and in the project Stormwater Management Plan (ENGEO, February 23, 2006). The objectives of this OMM are intended to support NPDES elements and long -term best management practices (BMPs), as well as Project Conditions of Approval by maintaining safe, effective and high - quality water treatment facilities. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 1 ENGEO INCORPORATED The goals for maintenance and monitoring of water quality treatment facilities at the Project are: • Maintain the bioretention facilities as all- season water quality facilities. • Preserve the structural integrity and intended capacity of these facilities. • Monitor these facilities for public safety and proper functioning. • Prepare maintenance and monitoring reports for these facilities. • Provide for any repair work associated with maintenance of these facilities. This OMM provides a structured monitoring and maintenance program including a plan regarding the frequency of monitoring, maintenance triggers and corrective measures. Drainage facility maintenance is an integral part of the process to provide proper function, promote public health and safety, and protect the development improvements from erosion and other natural processes. This document can function as a manual for the Project as it is presently proposed. It may be necessary to amend portions of this document to accommodate land use changes or unforeseen conditions. Modifications must be consistent with the goals and intentions of both the resource and public agencies. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 2 ENGEO INCORPORATED 2.0 FACILITY DESCRIPTIONS 2.1 Bioretention Facilities This Project is located in Alameda County (Figure 1), and includes four water quality features labeled Bioretention Cell No. 1 through Bioretention Cell No. 4 as shown on Figure 2 (also see Improvement Plans). The bioretention facilities require periodic monitoring and maintenance to keep the outlet and inlet structures free of blockage, to remove litter and debris, to ensure proper filtering and drainage, and to maintain the facilities for aesthetics. Facility maintenance should include vegetation pruning, inlet and outlet cleaning and observation of the structural components for structural integrity. The facilities are designed to remain free draining. If standing water is found for an extended period of time (defined as greater than two hours) within any of the facilities during any monitoring event, the facility and /or piping leaving the facility may not be functioning properly. In this case, maintenance may be required so that the facility in question remains self - draining within the time frame noted. The bioretention facilities have been designed for water quality purposes only. These facilities are not intended to be used as a park, playground, recreational area or parking area. The bioretention cells should not be walked or driven on, except when necessary for maintenance reasons. Because the facilities are designed to pond water a depth of six inches, access should also be restricted due to safety reasons. Signs and /or fencing at the perimeter of the bioretention facilities should be installed to prohibit homeowners and /or pedestrians from walking on the bioretention facilities. For example, a sign may read "This bioretention area has been constructed for water quality purposes. For your safety and for the protection of water quality in this neighborhood, please stay out of this area." 4663.1.006.04 December 5, 2006 Revised February 8, 2007 3 ENGEO INCORPORATED 3.0 FACILITY OPERATIONS AND MAINTENANCE Facility function for urban pollutant filtering should be maintained; for this reason, vegetation is planned in the facilities to aid in biological and chemical reactions. Plants are important for proper functioning, but should not be allowed to become so extensive that their root systems clog the subdrains. Pruning, removal and replacement with smaller specimens, as well as normal plant care are anticipated only to the extent that they do not hinder infiltration of water. The bioretention facilities are designed with a veneer of organic material such as well- drained mulch. The consistency of this medium should not be altered during maintenance unless specifically reviewed and accepted by ENGEO. Pesticides and herbicides should generally not be used within the facilities as the chemicals would add significantly to the pollutant load and might cause adverse changes in the biotic mix necessary for proper facility function. Pesticide use should be limited and only applied if absolutely necessary for mosquito control, with input from Alameda County Mosquito Abatement District, applicable resource agencies, and in conformance with all applicable rules and regulations. The following general maintenance activities are considered appropriate for the stormwater quality bioretention elements at Tract 7586 of Fallon Village and will be discussed in more detail in following sections: 1. Landscape Maintenance - The bioretention facilities will require landscape maintenance to control vegetation growth and improve appearance. Maintenance should limit the vegetation height, allow for a neat appearance and provide for adequate surface flow capacity. Maintenance should be in keeping with generally acceptable landscape maintenance practices. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 4 ENGEO INCORPORATED 2. Plant Replacement - All plant replacement materials should be able to tolerate saturated soil conditions for the length of time anticipated in the design storm event (one hour), as well as other anticipated runoff constituents. The bioretention facilities should be planted with vegetation having low water, fertilizer and pesticide requirements. Please refer to the planting palette listed on the Planting Plans for recommended plant types. 3. Debris Control - Litter and debris blocking the bioretention cell filter media could contribute to flooding and should be removed. Regular debris removal should be undertaken. This includes removal of woody vegetation blocking the flow path, removal of debris blocking facility outlets and inlets and removal of general litter from all facilities. 4. Drainage Monitoring — Because the bioretention cells are designed as filters, it is important that the facilities are draining at appropriate rates, and are not experiencing over - saturation or excessive ponding. Drainage monitoring should be used to record long -term changes in the system and highlight any needed maintenance to either surface or subdrainage, including the riser pipes. 5. Filter Medium Monitoring - Replacement of the sand or other media within bioretention cells should not be necessary as part of maintenance activities unless evidence of excessive saturation or ponding is noted during repeated monitoring and the integrity of the discharge piping has been established as functional. The design life of the filter system is generally greater than 50 years (CELSOC, November 2004). Filter medium replacement in such cases would improve aesthetics or repair systems damaged by high pollutant loads or excessive pesticide/herbicide accumulation. The original percentage of native soil in the sandy medium (specified on the Improvement Plans) should be repeated in any new medium placed in the facilities unless specifically approved by ENGEO. 6. Access Road Monitoring — Access roads should be monitored and maintained in a condition suitable for access vehicle travel. Maintenance should include reapplication of gravel or other surfacing as necessary to provide access for service vehicles. As currently planned, the above maintenance will be undertaken by the project Geologic Hazard Abatement District (GHAD). The GHAD will maintain and manage the bioretention facilities' water quality and drainage aspects and related drainage facilities as soon as construction has been completed. The GHAD will provide landscape contracting, maintenance and litter control within common areas, including the bioretention facilities. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 ENGEO INCORPORATED 3.1 Landscape Maintenance /Plant Replacement Vegetation should be planted and allowed to become established in the facilities; however, any planting should be irrigated by low -flow drip emitters only. Plant establishment is important because many of the chemical and biological processes that remove pollutants from the system are enhanced by plant growth. Landscape maintenance should include applicable pruning, light feeding, drip irrigation maintenance and annual mulch replacement. A 2 -inch veneer of organic planting medium such as mulch should be reapplied annually. The consistency of this medium should not be altered from that indicated on the Improvement Plans during landscape maintenance unless specifically reviewed and accepted by the Soil Engineer. The mulch layer is important to the bioretention facilities and serves an important function for metals and bacteria removal. The new layer of mulch can be applied over the older layer from the previous year. As stated previously, the use of pesticides and herbicides should not be used excessively within the bioretention facilities as the chemicals would add significantly to the pollutant load treated in the facilities and might cause adverse changes in the biotic mix necessary for proper facilities function. Stones and hardscape used in landscaping must not be continuous over the surface of the bioretention facilities, but can be incorporated into the landscaping plan with prior approval from ENGEO Incorporated or the Project Engineer. In no case should any portion of the bioretention cell be paved or have any surfacing applied. Access roadways within the facilities are acceptable as long as the road base is freely draining and has an appropriate bearing capacity. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 6 ENGEO INCORPORATED All plant replacement materials should be able to tolerate saturated soil conditions for up to approximately one hour and additionally should have low water, fertilizer and pesticide requirements. A suggested plant palette is shown on the Planting Plans. Plants can be pruned and lightly fed, as well as serviced with drip irrigation as long as the irrigation system is maintained in a proper working condition. Irrigation systems should not be allowed to leak or malfunction such that excess water is allowed to enter the water quality facilities. An observation of continuous flow in the outfall pipes could be an indication of irrigation system malfunction or overwatering and should be followed up with a system check for proper function. In summary, the maintenance and monitoring procedures for landscape maintenance and plant replacement should include • Pruning, mowing, and light feeding as applicable. • Checking for proper irrigation system function. • Annual mulching. • Observation of stressed or dead vegetation. • Scheduling for replacement of stressed or dead vegetation. 3.2 Debris Control Maintenance should include routine removal of litter and debris. This removal is anticipated as part of a routine maintenance program and can be incorporated into the landscape maintenance plan. Maintenance may include trash pick -up and removal, raking and removal of leaves /litter, etc. 3.3 Drainage and Filter Medium Monitoring and Maintenance The facilities are designed with diversion structures (weir boxes) so that higher flow events will by -pass the facilities and remain in the project storm drain system. If standing water or soggy, 4663.1.006.04 December 5, 2006 Revised February 8, 2007 7 ENGEO INCORPORATED saturated soil medium is noted during monitoring, it may be an indication of subdrain or outfall clogging and both the subdrain and outfall should be checked for integrity and proper function. The bioretention inflows, inlet and outfalls must be maintained in working condition, free of obstruction and freely draining. The bioretention facilities should be monitored for proper function and public safety. Of particular importance is maintaining the ability of the facilities to filter stormwater without clogging or becoming saturated. The facilities are designed to filter the 85th percentile runoff event (approximately the first I inch of rainfall runoff) and must function as water quality treatment facilities even if used additionally for aesthetic uses. To this end, the facilities must not be capped with clayey soils, paved or parked on for extended time or covered. Additionally, the bioretention facilities should not be used as recreational areas, and should not be walked or driven on except for maintenance reasons. It is anticipated that the rock aprons for energy dissipation located where water enters the bioretention cells may need periodic maintenance and replacement if there is sediment buildup in this location. The purpose of the rock aprons is to slow the water entering the bioretention cell, and also to trap suspended sediments in the rock prior to the water flowing onto the surface of the bioretention cell. Therefore, sediment buildup is expected on the rock apron and on the filter fabric beneath the rock. If sediment buildup has accumulated on the rock apron such that it appears that the rocks are not trapping sediment/debris or the void spaces between rocks are filled with sediment/debris, this is a trigger for replacement of the rock apron. To replace the rock apron, the filter fabric and rock should be removed and the filter fabric replaced with fresh material equal to that specified on the Improvement Plans. The rock can be reused if not coated with clayey soil. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 8 ENGEO INCORPORATED The surface of the facilities at the inflow locations must be regularly cleared of any excess clayey sediment and leafy material to enable proper flow characteristics. If sediment, leafy material or other debris is accumulating such that it has created a continuous cover over any portion of the bioretention cell, this should trigger the need to remove the buildup. Failure to do so can create the potential for inefficient functioning. The surface drainage and filter medium function should be monitored at least three times yearly, in May, August and November, with additional monitoring within two working days after significant storm events (i.e. 1 inch or more of rainfall in a 24 -hour period) to evaluate the function of the bioretention facilities. A weather forecasting website such as www.accuweather.com can be used to track rainfall amounts. Although the number of major storm events varies from year to year, a rain event of 1 inch or more in a 24 -hour period occurs on average roughly 3.5 times per year, but could be as many as twelve or more times per year. The results of the monitoring will be included in June, September and December monitoring reports. Inflow and outflow structures and subdrain cleanouts should additionally be checked for proper function and condition and repaired or replaced as necessary. As stated above, filter medium functioning should be observed three times yearly and additionally after major storm events. Observations that may indicate filter medium malfunction include but are not limited to excessive ponding, saturation and /or plant mortality. Excessive ponding or saturation should be defined as saturation or ponding of water for more than two consecutive hours. If excess ponding /saturation is observed, it should first be checked that the subdrain system is functioning properly. The subdrain should be evaluated for proper functioning by periodically checking the outfall to note if water is freely draining from the bioretention cell. If it is determined that the subdrain is not clogged or broken, this would warrant the need to replace all or a portion of the filter medium. It is expected that if malfunction of filter medium were to occur, it would most likely occur in the areas where water 4663.1.006.04 December 5, 2006 Revised February 8, 2007 9 ENGEO INCORPORATED immediately enters the bioretention cell, i.e. in the vicinity of the rock aprons. If filter medium is to be replaced, ENGEO should be consulted to confirm the locations of replacement and for observation of replacement activities. The entire depth of the filter medium should be replaced to the depth of the subdrain. In summary, the maintenance and monitoring procedures for the surface, subsurface and medium drainage should include: • Observing inflow, inlet, spillway and outfall locations for function. • Checking for soggy or saturated soil medium. • Repairing broken or blocked piping. • Replacing the inlet rock apron filter fabric as needed if sediment build -up is visible. • Observation of the filter medium for any bare patches or rills on the surface on the bioretention facilities. • Observations of the berms surrounding the bioretention cells for any bare patches, rills or slumping. 3.4 Access Road Monitoring Access roads should be checked annually to determine if the access road is suitable for vehicle access to the bioretention cell. If needed, an application of gravel or other surfacing should be applied to the access road. The access road should be checked for erosion, rills or other problems that may affect the integrity of the access road. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 10 ENGEO INCORPORATED 4.0 MONITORING AND MAINTENANCE SCHEDULE The following schedule for monitoring and maintenance is recommended. The schedule may be modified as needed when conditions change in order to fulfill the overall facility maintenance goals. Monitoring visits can be performed on the following schedule: ITEM SCHEDULE MAINTENANCE /REPAIR 1. Landscape Maintenance Check plant height and health, and prune plants over three feet in height. If needed, plant replacement should be able to I.a. Pruning and light feeding Monthly tolerate saturated soils, and should have low water, fertilizer and pesticide requirements. Please refer to planting palette specified on the Improvement Plans. I.b. Check for proper irrigation Monthly Repair irrigation system as system function needed. Apply 2 -inch mulch layer I.e. Reapply Mulch Yearly yearly. Can be applied over revious layers. 2. Debris Control 2.a. Routine removal of litter Monthly Remove debris /litter as and debris necessary. 3. Drainage and Filter Medium Monitoring and Maintenance Three times yearly (May, August and November) and 3.a. Check for standing water or additionally within two Replace filter medium as soggy, saturated soil medium. working days after storm necessary. events with rainfall exceeding 1 inch in 24 hours. Three times yearly (May, 3.b. Surface of facility at inflow August and November) and locations should be cleared of additionally within two Remove debris as necessary. excess clayey sediment, leaves working days after storm or other debris. events with rainfall exceeding 1 inch in 24 hours. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 11 ENGEO INCORPORATED ITEM SCHEDULE MAINTENANCE/REPAIR 3.c. Check for sediment buildup Remove filter fabric and rock. at rock apron inlet protection. Pearly Clean rock, replace filter fabric as needed. Three times yearly (May, 3.d. Check inflow and outflow August and November) and Clean /repair as necessary. structures for clogging, and additionally within two Repair any broken or blocked check subdrain cleanouts. Forking days after storm i p p g- events with rainfall exceeding 1 inch in 24 hours. 4. Access Road Monitoring 4.a. Check that access road is Pearly Reapply gravel or other suitable for vehicle access surfacing as necessary. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 12 ENGEO INCORPORATED BIORETENTION FACILITY MONITORING PROGRAM MONITORING REPORT FORM Please refer to the improvement plans included in the project Operations and Maintenance Manual for bioretention cell locations. This monitoring report form is being completed for: ❑ Bioretention Cell #1 ❑ Bioretention Cell 92 ❑ Bioretention Cell 93 ❑ Bioretention Cell 94 A separate monitoring form should be completed for each bioretention facility. Reason for inspection: ❑ Scheduled inspection (in May, August or November) ❑ Inspection after major rain event (greater than one inch in 24 hours) Inspector Name: Company: Date of Inspection: Date of Last Inspection: Plant Health (check durine every inspection): Do plants appear to be in generally good health? ❑ Yes ❑ No Are plants over three feet in height (excluding trees)? ❑ Yes ❑ No Does it appear that the top layer of mulch needs to be replaced? ❑ Yes ❑ No Describe Conditions: Corrective Actions (if needed): 4663.1.006.04 December 5, 2006 Revised February 8, 2007 1 Irrigation System Functioning (check during every inspection): Does irrigation system appear to be functioning properly? Describe Conditions: Corrective Actions (if needed): ENGEO INCORPORATED ❑ Yes ❑No Drainage and Filter Medium Monitoring (check in May, August and November, and additionally after large storm events): Is standing water or soggy, saturated soil present in the bioretention cell? Is there a build -up of excess clayey sediment, leaves or other debris at the surface of facility at inflow locations? Is there a sediment build -up at the locations of rock apron inlet protection? Are any of the inflow or outflow structures clogged with sediment/debris? Is water draining freely from the subdrain system? Describe Conditions: Corrective Actions (if needed): Access Road Monitoring (check once per year): Is access road is suitable for vehicle access? 4663.1.006.04 December 5, 2006 Revised February 8, 2007 2 ❑ Yes ❑No ❑ Yes ❑No ❑ Yes ❑No ❑ Yes ❑No ❑ Yes ❑No ❑ Yes ❑No Describe Conditions: Corrective Actions (if needed): Other (check durine every inspection): Is litter /garbage present within the bioretention cells? Describe Conditions: Corrective Actions (if needed): 4663.1.006.04 December 5, 2006 Revised February 8, 2007 ENGEO INCORPORATED ❑ Yes ❑No ENGEO INCORPORATED SELECTED REFERENCES 1. Bedient, Philip and Huber, Wayne; Hydrology and Floodplain Analysis, Third Edition; Prentice -Hall, Inc., © 2002. 2. CELSOC, November 29, 2004, Low Impact Development Workshop by Larry S. Coffman. 3. Contra Costa Clean Water Program, Stormwater C.3 Guidebook, Third Edition, dated October 2006. 4. ENGEO Inc.; Stormwater Quality and Hydrograph Management Plan, Tract 7586 at Fallon Village, Alameda, California; February 23, 2006; Project No. 4663.1.006.01. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 LIST OF FIGURES Figure 1 Site Vicinity Map Figure 2 Site Plan Figure 3 Typical Bioretention Cell Detail 4663.1.006.04 December 5, 2006 Revised February 8, 2007 ENGEO INCORPORATED 0 0 w r a 0 27 ` 28 26 FALLON ILLAGE PROPERT BOUNDARY I SI(ML ''l i ('tip PL r �D ae1�QI r /` e n ��5� � lrJ• , 3 E k L1IFatm I LID CIA ti I� s 26 r r I . 'i I A I ] DR - - •: .. i FRIE f I DR $1 E.B. PAR S L.P ANDERSON _R lip � L PROPERTY LAs PosiTA5 �I� i' µf4t�CiL �.I i • . wlplar n 7' �. 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FALLON VILLAGE O &M MANUAL FOR BIORETENTION DATE: OCTOBER 2006 1 I N C O R P O R A T E D 1 EXCELLENT SERVICE SINCE 1971 DUBLIN, CALIFORNIA DRAWNBY: DLB CHECKED BY: J G: Drafilnq DRAFTING2 —Dwq 4663 006 0_M— Manual 4663100604 -0 —M— Manual- 1VcMap- 1006 .dwq 10 -19 -06 03:33:29 PM ORIGINAI FIOIIPF PPINTF❑ IN C010F it 1 FIRST AMERICAN CROAK EDPO PROP ' 1 TITLE PARCEL BOUNDARY (JORDAN PARCEL) Y RRANAUGH I i1 1 CHEN j RIGHETTI PARCEL J y PROPERTR S r I ILP ' Y CYLLIER CANYON RD I . 'i I A I ] DR - - •: .. i FRIE f I DR $1 E.B. PAR S L.P ANDERSON _R lip � L PROPERTY LAs PosiTA5 �I� i' µf4t�CiL �.I i • . wlplar n 7' �. PL,EASANTON RANCH �' — �ng1c Y u • toNpoy INVESTMENTS GOLF, -- �L arlausE POR3� RH STAPLF3 T.11 _ i ........ ....i. COURSE" T €RMIHr_ LAS POSITAS tr RFprdT PL —.. 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FALLON VILLAGE O &M MANUAL FOR BIORETENTION DATE: OCTOBER 2006 I N C O R P O R A T E D EXCELLENT SERVICE SINCE 1971 DUBLIN, CALIFORNIA DRARINBY: KA CBECKED BY: J G: Dr& lna DRAFTING2 _Dwa 4663 006 0_M— Manual 4663100604 -0 —M— Manual- 2RlocellLocatlon- 1006.dwa 10 -19 -06 03:34:41 PM —1—Al —11- neiuTPn IH --P IMPROVEMENT PLANS FOR BIORETENTION CELLS NO. I — NO. 4663.1.006.04 December 5, 2006 Revised February 8, 2007 ENGEO INCORPORATED .5 5 X / P 532 IR (BY GTxERS> ( ,EE STEEL 23 FOR PLIEREIGE DRAWINGS) / �iXo P Nh �4P a SEE 3 . ) OE (sEEreG o oes ous) (srF xm x�DI) K x) L- xRE fui) 1. DINT zl -sox H � � S y I OW w ?AO OUr <ou w�q 111 b ox CELL woE i'ul:.) EU g s / is (SEE .me .xs sxEE,)`.o xs fsccsuo.e Ere,xs sxcnj exnE, sxioR SSnuo incnreo.) 23 z / ,( E SS£ 'DR IDPI BIORETENTION CELL rote REPS [xt[oRAwi es) TYPICAL SECTION A -A' G SCALE W= GP OF 'A' IO fLL ET a arzFiF ou CELL NOTED «x o Ax a x, x ,i AI /i J �o a aPOA, THE OE 1 11 IRIANI HATTER AID OTHER DELETE""' a I V `� J i' ua _ s TO THE RECIAME. OUT, OvE. aocKS SHALL BE REMOVED FROM All FILL MATERIAL TO THE sATlsrACFiOU of THE GEGTECxx CAL ENGINEER, GGAL AVAILABLE AT xRw,H ��GTLLErePGO �suE � J 5 z �� ✓ / u= 1 (FDO) 22 Mx x TO NOT G GLExG. sMGGTH GGT FNGH sGreFAGE PreGre TG Pax,xG INCORPORATE ORE TGx oo i n z" T sPEG F GAT s DESCRIBED EPARED BY ExCEG. HEALING G GxGEre SECTION z.GS PAre, 2-PRODUCTS x THE GEG,EGHx GAL Gre GE GGxTre Gx PR o \` A - a ^ ISHALL BE CKAPS GEGxE, Tx :Gore APPreGVEG EGrevALLxT N SHALL eS sraPS DSOCOMPOS re ru zzO wrH s oz ABRC ore aw RO V SiD BOLA vaLSHT ' - GRAx ( cviL PL A LOCATION MAP 1 .�qr �• 1`�,vl�`. m\ 9 o . � AND LGC ATO N) JUICTION A o 22 ) ` / u ( o Gis) 10 SCALE P LLP TED 3NE E ALONG S B CAR ac AMID uoT Lcss Cxau TxRSS HoLSS Pc' L R FOGT OF PPe SUBDRnx HOULD E PLAED T A ,x SLOPE MxMUP MY CAL y4 u R�A �A L ne uETE E o �C x / CPcpeoOSV(a.MOeO r r aoL BGARD wcTH LABORATORY TSsr (ASMoazco uirHACUrO Snuc RSSULrs PRro PcSMSUT o vcR oc (UGH AuL D oR u rHE TOP u uLe /� \ ./ / GRADING PLAN - BIORETENTION CELL #1 S S e scnLE. i = sG pt�1111111[1114111 ill 11111 J, _ 9 o so ,00 ,so SECTION 1 -1' oO sso ;oo s:o SCALE. , =zO rnau o�vExsF, l a "` DII SET 11 1 - - -- - - -- -- -- ,x rlMu o so ,OO , :O zoo s:o Boo asO Soo Soo zso sso SECTION 2 -2' _ _ __ ____ __ ____ __ ____ _ ,z �xluu su reau sLOo - -- sos 22 o so ,00 , :o zoo zso SECTION 33' , :o Too <oo Soo sso 00o F o s d1 APRON DIMENSION TABLE Al RAP ,PRO EROM olvEasloN �s reIP RAP o ewreElcNnoN ccu FINISHED GRADE RC RIAIN OILIER RARRIC ELEVATION VIEW (AMOCO ENreoPEx zooDIs 6 OR APPROVED RIP RAP APRON DO SCALE s 111ER1 (EMO re ° „ A� �E1N1=NEO GRACE ER 2' -fi 9Y� `i �j �� 90110M OE 110RE1EMION CELL MIN. m REIUroRCEO CONCRETE RISER FIRE NCENTIIE DETERMINED EIEER SIR ° 111NIA1N OUILE1 Ito =Tare RAIN> =ME a�N _AT =A — 'FILDN'T'AMID 'M —RELAST OR FIELD vouaEO ansE ELEVATION VIEW SECTION A -A' JUNCTION BOX NO SCALE /—#A RUAR wElnEO (1rP.) TRAD WITH E /w, ., r—_ RISER RIPE TRASH RACK GRATE ASSEMBLE DETAIL NO ICILE IL W�a - ao� 23 OE . sNEETS PLAN - DIVERSION STRUCTURE -7-7 :o iL n F/L 0 _/ Fn c SECTION A -A SEC110N B -B NOTE. SEE STORM FRAN DIVERSION STRUCTURAL PLANS By OTHERS FOR STRUCTURAL DETALS ISOMETRIC VIEW - DIVERSION STRUCTURE BIORETENTION CELL 91 - DIVERSION STRUCTURE 91A PLAN VIEW NII SECTION A -A LTI DIVERSION STRUCTURE DESIGN DIMENSIONS AR�I URf F/L "A- F/L -B" F/L S TOP WEIR "o" WEIR WEIR PIP(10 0RL .A N0. ELEV. ELEV ELEV. ELEA LENGTH (TS I TA 56.J6 56.J6 52.J6 52095 4.19 10.0 18" 819 12.19 TB 55.26 55.26 51526 5—P 2.12' 5.0 18" N/A 6.99' NOTE: N/A IN TABLE ABOVE MEANS THAT A DROP OUTLET IS NOT NEEDED FOR THESE DIVERSION STRUCTURES. SECTION B -B NTS ,e'L IL a Cd 3 W1. ISOMETRIC VIEW NTI BIORETENTION CELL #1 - DIVERSION STRUCTURE #113 u R z (BY OTHERS) (SEE SHEET z T R NT1 URa ) HE \s s / Fl, N o G.GvI��� fi NF BE "WAY (SEE BUT'1. SHEET Y1s) PVC OVERFLOW Rs (TYR or z) GETaiL, SHEET I9j (SEE BE_ SHEET t Y_ BIORETEITOR CELL 7 463 MAINOLE ANN w RISER (sBB oBTn1D11111, sn BBTR 2) 46 5 111 D 111 s 111 SIZE ANN EocaT T RAINa PRE AND (TEE iorv) GRADING PLAN - 11ORETENTION CELL #2 N SCALE. , = zo ir !!!llri"fiQYtil1 SECTION 1 -1' �(ourFxcw omc ouu nuo oTSlau cRRL (sec D', I,) cx uorzs. :xis sxse„ sx (MIN.) esT) ocJ k�lS'�soo� R"T�vc couPncnou -9ox To �tDa _Y, sou uore.:xls sxem AsEE vc � RAT (srF 11A.is asxrn).exwc. pD,, NORp �xTissxeflRn.oa. BIORETENTION CELL TYPICAL SECTION A-A' ����xa�al�� xax <xo oeslRx �RO=s_se��o.n x,HM., Mw.) «EE „ xEa, E oMP,,ou iIM °ore, ,xis sx 111 .o .E i� ES.o ELR S SE, ,,Lx �J Pa:S "� ROw . x ;�o., R«x,I R,oR<TEO =MROR<. Pll (,ER BIORETENTION CELLS TYPICAL SECTION B -B' N. STALl BIORETE11ION CELL N.— SHALL BE III SAID. GM All 21- 11 1 oll- WITH LESS EXCAVATED 6N-SITE MATERIAL AILL BE CONSIDERED SUITABLE 11 IT CONTAINS 10 MORE THAI LL �aaaT 2s - EST (o) AS LE CM% WITH .11HIL- 1111R GUIDE 101— 51PEIFICATION5 THE'— BY ENGEO. —DETAL SHEET 19) 480 1GRAID MANHOLE G s ... TV D - 4).AEIGII v 3 %a'P G D14METER HOLES, 3oG s (asT sa. GNT, HIRE COU MIY TEST No COLLECT OlE MEDIA BY HTM(ACTUROZ FILTER ). co�riRM B,H4TTPE uc gzoo =EVE (AITH )a FILTER -1 R sTP(AST -ss) TH e2 (REc Do" NO CONTROL aRD)Uw GRY TESTING RESULTS IRION TO BLAGEMENT or THE ToB LAYER 0. 'ECETAT OF MULCH ADD S 9 7 A P. z a u Z �o Cawoz z� Q Q ai 19 DI ERSIDN STRDC,MRE FROM L 11 1 PLAN VIEW STORMDRAN PIPE FROM RIP RAP APRON OIVLRSIOM STRDL.DRL— s LS RIP RAP EINISxED B' AB' �-- UROET RIIN WITH FILTER FABRIC ELEVATION VIEW (AMOCOEPRCPEY 2016 OR APPROVED RIP RAP APRON NO IC111 INSTALL 8-1 RANCOR 1. HE' 5469 5 20l ID `RN BRAIN ORALLOU 1 FAT A COMPACTED TO 92% RELATIVE COMPACTION IS WALL Loris PIPE <ct D sic LETAIL. THIS SHEET OVERFLOW RISER DETAIL DO SCALE O aLOwuME of V -DITCH ED 4-1 A' IF 'AT COMPACTED TO szr. aEUnvE CDMPAEnoM ne�sic cETAIL Txls SHEET BORETENTIO1 CELL CONCRETE V -DITCH EMERGENCY SPILLWAY DETAIL �A REDAR „L. STEEL , /S" BE T RISER PIPE TRASH RACK GRATE ASSEMBLY DETAIL DO SCALE DIATE 5 1 r — P ISFIRISHED DAADIE SHEERiSER -R" #rlL Lx" " W/ / / /// R M4 , COMCEMTRC RISER MARNOLE SLAD R m EXACT HEIGHT ERM r, °� DET . — � 9MRDRAIR PIPE CENI.Em 1. EASE E, PRECA5T OR FIELD ELEVATION VIEW JUNCTION BOX 10 SCALE ---1 I _E MESn SECTION A-A' CONCRETE V -DITCH DETAIL �3 a W U V O � Fez¢ u QP"�a Owl 9 EEZFIT s EOWE c' (�o «e "LEA -LOPS Z, W =� - D I �D WEIR I • ai W c7 Oq�l s I ISOMETNR..IsC . VIEW PLArvN . .sVIEW ens �. \ ,r SEE aEFaxcoFxr CONSTRU -01N DETULS. TxesE wxs waFoa U >6 �z }t fit` W 6� zwWq L 2azF ai 5 Q 3 � u L— wEie FEr`NiloN 1 Ell � oN� a - 9 Ea � o� rn � /�.A a CELL NOTE: SEEBTORMDRWND.lR .N8TRUCTURAL ISOMETRIC VIEW PlAN8 BY O'DIER8 FDR 81RUDTURAL DETAILS SECTION C -C SECTION D -D nl,rs wrs. � BIORETENTION CELL #2 - DIVERSION STRUCTURE #2 g uo SCALE 4 p[8 B 1 21 a 2a s LC ETENT ON S ° DIVER51ON E OTHERS) (SEE SHEET 3. F0 R NGS) 441L,fIN: / - uLCH /NONRas, AND 20 -30x TOISOIL NITH LESS THAI 5% C­ MAXIMUM NOT EXCEEI "' 94 E A 5 , o °N. NT w� THE. 03 M RE';E M' N o - o � TOE: „E A SEacr °N °E THE GE °iEONNCALENGNEER. ° "`NaErea` I(� / ° LEG r N �uESS DN��E. EAIIA EIC Z,� _AI TI ARRreD EG EGGAE. '.UII INTO TOP 6 LAYER 01 585 588.7 rl�� SOIL III. our ORIOX TE ITH RHrore�o "IT I L cEHOUS ELEND. �� s �N°�° (s E Er 2) a of 41LGNH 74,3 7V me cwrwnNicac eume coMream sPeoiFwarious Preeaareeo er eNCw A+ -ILL IDI 15 D a TESTS n HA BE SEARS IN 270 OR ARRROVED EDDAL. �zJ 6 zi V s oscc ACi�i� °KLAN Tore / N I o.6Sa �4 / #'s o GnsiMRO ao3sge PU orevc�ica oNS. vcaEOrenoo"P PESSxnz Q W Ere oi' D� '� ETa LS R �Oa6 Y,1 SCORE N�N�NDN. T GE R�RE. SU—N SHOULD BE PLACED AT A z P.642. re;� °oF F °�, R °M„ GNE�� r „Ar GN N�E G °� ENi a GuE' o EF'La R PER��°T ” NED�A U, E LANE nN GGNR�'I 'HA' w IERC NN EASSING.oz°° SIEVE�(asrN °<zz-E3> DOES NGr EXCEED zsx.� �7 q �sE °r' LAN; z° °w N' aGMET a TEST sA TM G<zz_G,r THAT ca, cGNTENT oE,a DUE E DOES D; °P WARE;o UA;EE�,E. °� o °,�E °;o 111 Ha AP °Mic °R%1.E ° Q �RENA�ERr=.7or E VEGETATION. I GRADING PLAN - BIGRETENTIGN CELL #3 cre uncu cEU RELATIVE IT SOIL "�' T s -sox EN SCALE , = zO �(sc�c HGRaoiuc vuu nuoEOESwN Caoss- sccTiONS) � —NDLcH (SEE Noics, THIS SHEET) / [—U"TI1 11 BELL Gs VERS oH WITH RSER )RIPE RIORETENTION CELL DrvERSIGH ks FIT GAP A SHEET 11 —SUBDRIII (SEE NOTES. THIS 5­1)_ SECTION I.V o ix (sE "EEr) ! HiuiNUu ( Nnsi.) z.ls CLASS z REaNEaELE Na m _ i�u= ..uF�D- sD OT ° (SEE NOTE, THIS SHEET) uAS ENSSUECreno ,iF�„ uorE, rHis sN (SEE EEr) (SEED o THIS SHEET AND o re ° EU, AND EccAr DU) BIORETENTION CELL 62C TYPICAL SECTION A -A' 61B NO SCALE BGo ME :.............. FROM DIVERSION STRUGIU Z RAP ]SROE RIP RAP RIOREiEUTION CELL RD RLFIN WITH FILTER ROVED ELEVATION VIEW (AMOCO — ENreoPEx zois OR aPPreovcD RIP RAP APRON T w c �o o� zu 6 O w SECTIONAL PLAN VIEW lu sza.ss i �i kNOUOUne� ripe (m.)NLe SECTIONAL ELEVATION VIEW JUNCTION BOX / OVERFLOW PIPE 2 WELDED (,.P, � —Al RISER PIPE s w= Lu � iD° TRASH RACK GRATE z� ASSEMBLY DETAIL W= T w c �o o� zu 6 O w SECTIONAL PLAN VIEW lu sza.ss i �i kNOUOUne� ripe (m.)NLe SECTIONAL ELEVATION VIEW JUNCTION BOX / OVERFLOW PIPE 2 x Apps i� vn'a Al] Lu a�y PLAN - DIVERSION STRUCTURE F W �D Q � A i 0 � Q 3 SEMON A -A SEMON B-B s' 6 � U >_. € \ SEE sTaucTUxaL axo crnL 1-5. roa NOTE. N/A IN TABLE ABOVE MEANS THAT A DROP coxsTaucriox oeTaLS. OUTLET IS NOT NEEDED FOR THESE i DIVERSION STRUCTURES. - % 90.Wq ac�wwc soucc rs�cr�r u+o mwas E 9 y: BIORETEI ION CELL #3- DIVERSION STRUCTURE #3 F s s IROJECT 10. DIVERSION STRUCTURE DESIGN DIMENSIONS STRUCTURE N6. F/L �A' e�ev. F/L "B e�ev F/L "C e�ev TOP WEIR "D' e�ev WEIR Hr. WEIR �ENmH plPE �O llLL � � 3 638.80 638.60 638.60 640.04 144' a.p' DIE' RSION. ;ar O EreF sa(s reEE 'oreE E ory cE c E_ �re � ��" �= � �I o �w° — 25%. SOIL S O'RA ry E a,wE u=Ery =rv.�� reavE rE �EFa,o ow NO THEIR =,s.a ,2 r CiLL INArereaL ro rue sAnsCAen or rive OCarecervlcAL CINCwCCR, IN MULCHns a ec�Fieo naovL. ory ROCKS SOL SIR oeceoAR BARK Ore APPROVeo eouALL. AvA� -FLe AT W= (see erwil "ems 1 5765 55.6 5 - xe vaooucrs e. .rani aus cos INTO eous eLervow 01 ELI O 5 9 586 m Flrv�srv(BSURFACE Pre oR rO Purvnrvc s OIL 5765 z¢� P 4. orECBry AL INoE EorvrB E, sPE E Arlorvs FreEFABEO B. z II ors LE P�LreP rvAr: F : P ore AFPreOVEO EouAL. H0ACL BE sx Orrv_,7a 0M 57, 576b 7,9 P.550 W Q HALL BE s S OBOCOINPOSINE rry zza wnR B Oz FABRIC OR APPROV EQUIVALENT. — ry q Q n �o I APO re o I I oNSUBO�, N: u rb IreEEk ArvredLE w R� re FereroRa,eo sueoRAlry sw,a Be BereFORA,eo vvc soup wALL soR ss E (SEE a PLAIN P (see Der �ASrM o- .,o3aq. FL,CE FEre.ore11 —C oowrv. ALL e�FE ,o rv.s rvALL z u ILS >" 86 PEa ATIOINS. PErePOre TEA ME o O sneer z 5 9IX� 5 1 EF 3IA- E PIPE rvsreauLO SPLACEO R L E '��y - I I are I __ __ 1 — 1 - - - -L —J 6'w'�a HAVE a MIUIMUU o Pc AIN INor LESS rreAIN A' D _ rex N"NFlmuIN� FIRE, su o O , 576.5 LINns Or BIO L PLC or nLr R MIx oINrireu, rrvAr arewINlc coINrcINr �, CDl 552 ,k 576 576 _ NEOA Br Lurve (ASTry OrzBra). cONFIrery THAT �+ 78 `ses`Nr`e.c`ee's�°A PePORITC LA�z —Br> Does INor e.ceeo �sx. 578.51 &1 FIre M." r sAS, Oa -c3, rIN Q ro`:NC awocB II RREOIONAL wATEreoOUAUT.ECONTreOL rveonre of wiTaRlueoreATOrer TESnN a ON C vecernnorv. T PaCEINErv, of THE ,o L <vE OE MULCH Arvo OPE Il INOL TOSIN N M M M E. IGRADING PLAN - BIORETENTION CELL 94 N SECTION 1 -1' isEIE "u�xo OAN ..o ozs�c. clws�sECno.+s� LETRC) �P o rvuLCx aEE .a.ES, .ws zzo L sz n"xT sx (u.i su-11 is`o,e. ,xis sx c�,� °.0 �s`iEUxo M-11A, 1sie1 u1 ,1,Ei4ls slLie � onus Boa size AND Loc.��ou� � W BIORETENTION CELL oaC <no TYPICAL SECTION A -A' SHEET aeP CELL o SCALE LOCAT.O. iuu NO SEA. rt.1 LOT NO rya........... L al..fi.....e.aria :: . reiP reap arreou �s "m s.oa�noan1. 111E reo 'All I ELEVATION VIEW EaHOCOEareoEx axis are iAPRR _ RIP RAP APRON A �4 REaare STaaP '� re1sEre PIPE TRASH RACK GRATE ASSEMBLY DETAIL oN., o1u° Ato rc 0 l it 3 ? .o w.LL m11 � i� \2reo PO 1—Ii — « o s �,•,• ,�au�. ,xis sxeeeisee JUNCTION BOX / OVERFLOW RISER �a a� u Fez¢ u ww�04 0 ca Ca 2 0E 3 SHE— B �a Qa ' F/L C s A �Lu PLAN - DIVERSION STAUCEEM F Q W ` a aW E7 ulR F w € NOTE. N/A IN TABLE ABOVE MEANS THAT A DROP .� zu RA o OUTLET IS NOT NEEDED FOR THESE a, Oaz DIVERSION STRUCTURES., Cam 0 ro ! TEL I/L .a. F/ . F� o_ IELL SEMONA -A SHCHONB B _ E r T3 \J � see sTaucTU11 —`=' xD DE S. roa coxsTaucriox DeTULS. _ EE, 3��a 3� BIORETENTION CELL #4 - DIVERSION STRUCTURE #4 F 3 s E DIVERSION STRUCTURE DESIGN DIMENSIONS SiRU iURE F/L "A' F/L "B" F/L "C' TOP N0. ELEV. ELEV. ELEV. WEIR "D" ELEV. WEIR Hi. WEIR LENGiH PiPE�Ip ECfLL (DIA) "F" "H" 4 5]].00 5]].OU 5]].OU 5]8.88 1.88 5.0' 15" N/A 5DU APPENDIX C Fallon Village Site Geology _ 1 •! r I.. 'i L �. A P P E N D I X C ENGEO Expect Excellence— Site Geology The geologic units mapped on the site include bedrock and surficial deposits consisting of artificial fill, alluvium, colluvium and landslides that are described below. The geologic units described below are adapted from reports completed by ENGEO Incorporated for the site. Geologic Units Artificial Fill. Artificial fill encountered on the site is associated with some of the roadways and other areas in the project including a quarry area. The fill materials were described as a mixture of clay and rock fragments. Surficial Soils. The surface of the site is typically mantled with 3 to 4 feet of dark gray -brown clay derived from weathering of the underlying parent material consisting of weak bedrock or alluvium. The gradational contact at the base of the desiccated surficial soil layer typically exhibited a zone of discontinuous slickensided shear planes that we interpret to be the result of seasonal shrinking and swelling of the clay soil. The above - described features are typical of highly expansive clay soils. Plasticity Index (PI) from 30 to 51 were reported from samples of the surficial soil, indicating that the surface soils should be considered very highly plastic and critically expansive. Colluvium. Mantling the bedrock and filling swales of the site are colluvial deposits. These sediments are derived from weathering of the underlying bedrock and consist mostly of a silty clay matrix with sand and rock fragments. In general, the deposits of colluvium in site swales should be expected to range from 5 to 25 feet thick. Laboratory testing indicates that the colluvium is overconsolidated and moderately compressible. Where colluvium is located on sloping ground, it may be characteristically unstable. Within swales, the colluvial deposits tend to be relatively thicker and may be subject to flow or slip downslope. Landslides. Landslide deposits consist of masses of unconsolidated material and /or bedrock that have moved downslope by sliding, falling, or flowing. Landslides ranging in size from very small to relatively large occur along the northern edge of the site. The landslides include soil slips, earth flows, debris slides, areas of shallow slumps and gullying, large predominantly rotational slumps, and translational slides. Alluvium. Alluvium underlies the wider portions of valley floors on the subject property. Alluvial soils in the site vicinity typically consist of very stiff silty clay with minor amounts of interbedded gravelly clay. On the southwest portion of the property alluvium may be as much as 100 feet in depth. Laboratory testing indicates that the site alluvium is overconsolidated and relatively non - compressible. 4663.101.001 May 8, 2007 Latest Revision July 3, 2013 1 ENGEO Expect Excellence— Bedrock. Bedrock at and north of the site was identified during subsurface explorations during site studies as weak clayey siltstone and claystone, with relatively minor amounts of interbedded friable sandstone. Bedrock was described in the boring and exploratory test pit logs as having shearing is interpreted to be the result of the regional folding of the bedrock formations. In general, bedding was described as striking to the north - northwest. The fine- grained rocks including claystone and clayey siltstone should be considered highly to very highly plastic and critically expansive. Gmunduinter At the time of subsurface work, groundwater was encountered between 14 to 40 feet below the ground surface in the exploratory boring where it was encountered. Fluctuations in groundwater levels may occur seasonally and over a period of years because of precipitation, changes in drainage patterns, irrigation and other factors. Future irrigation may cause an overall rise in groundwater levels. Seismic Sources No active faults are known to pass through the property, according to published geologic maps (Dibblee, 1980; Crane, 1995; Graymer, et al. 1994). The nearest State -of- California- zoned, active' faults are the Calaveras fault located approximately 5 miles to the southwest and the Greenville fault located about 6 miles northeast of the site. A "blind" thrust fault has been mapped traversing the southern portion of the property by Dibblee (1980), Crane, (1995) and Graymer, et al., (1996), at the northern edge of the Livermore Valley. This mapped thrust fault is not considered active by the State of California or by local geotechnical consultants. While the probability of ground rupture is considered low, as described in the ENGEO Geotechnical Reports, there is a high probability that the site and any improvements will be subject to strong ground shaking during the lifetime of the project. 1 An active fault is defined by the State Mining and Geology Board as one that has had surface displacement within Holocene time (about the last 10,000 years) (Hart, 1994). The State of California has prepared maps designating zones for special studies that contain these active earthquake faults. 4663.101.001 May 8, 2007 Latest Revision July 3, 2013 2 for VILLAGE FALLON t HAZARD 'r DISTRICT DUBLIN, c r c July 3, 2013 "` 'GE0 uuuuuuuuuui Expect � xcefience Page CERTIFICATION OF FILING ................................................................................................... I I. INTRODUCTION ................................................................................................................ 3 11. BACKGROUND ................................................................................................................... 3 111. GEOLOGIC HAZARD ABATEMENT DISTRICT BOUNDARIES .............................3 IV. SERVICE LEVELS ............................................................................................................. 4 V. DESCRIPTION OF THE IMPROVEMENTS MAINTAINED BY THE GHAD .........5 VI. ASSESSMENT METHOD .................................................................................................. 5 VII. ASSESSMENT - BUDGET ................................................................................................. 6 EXHIBIT A - LEGAL DESCRIPTION EXHIBIT B - GHAD BOUNDARY EXHIBIT C — FALLON VILLAGE GHAD BUDGEI 4663.101.001 July 3, 2013 uuuuuuuuuui """'GE0 Expect � rrceher)ce GEOLOGIC HAZARD ABATEMENT DISTRICT- FALLON VILLAGE (Pursuant to the Public Resources Code of the State of California, Section 26500 et seq.) In N 111,41 The Geologic Hazard Abatement District ( "GHAD ") provides monitoring and maintenance of improvements related to geologic hazard management and other responsibilities as a land owner, within the Fallon Village GHAD and levies and collects assessments in order to perform its activities. The improvements, which are the subject of this report, are defined as any activity necessary or incidental to the prevention, mitigation, abatement, or control of a geologic hazard, construction, maintenance, repair, or operation of improvement; or the issuance and servicing of bonds issued to finance any of the foregoing (Section 26505). This report consists of seven parts, as follows: I'. ' 1` 1 4663.101.001 July 3, 2013 -1- uuuuuuuuuui ""GEO Expect � rrceher)ce The undersigned respectfully submits the enclosed Engineer's Report. Date: July 3, 2013 By: ENGEO Incorporated , GE Uri Eliahu I HEREBY CERTIFY that the enclosed Engineer's Report was filed on the 16th day of July 2013. Caroline P. Soto Cleric of the Board Fallon Village Geologic Hazard Abatement District Dublin, California I HEREBY CERTIFY that the enclosed Engineer's Report was approved and confirmed by the GHAD Board on the 16th day of July 2013. Tim Sbranti President of the Board Fallon Village Geologic Hazard Abatement District Dublin, California 4663.101.001 July 3, 2013 -2- uuuuuuuuuui ""GE0 for HAZARD FALLON VILLAGE GEOLOGIC ABATEMENT DISTRICT for a FISCAL YEAR 2012/2013 UPDATE The Dublin City Council formed the Fallon Village Geologic Hazard Abatement District ( "GHAD" or "District ") on December 4, 2007, under authority of the California Public Resources Code (Division 17, commencing with Section 26500). Included within the District were 1,043 single - family residences and adjacent open spaces within the Fallon Village development (Subdivision 7586). The Dublin City Council members act as the Board of Directors of the Fallon Village CHAD. This report updates the budget information provided in the May 27, 2007 (with latest revision December 13, 2007) Fallon Village GHAD Engineer's Report ( "Initial Engineer's Report "). On February 5, 2008, the Board of Directors accepted the Initial Engineer's Report that included an assessment limit for each of the parcels within the CHAD. The Board of Directors also imposed assessments on the properties within the GHAD to fund the improvement, monitoring and improvements described in the GHAD Plan of Control in accordance with the provisions of Proposition 218. The budget in this Engineer's Report is within the assessment limit approved by the GHAD Board of Directors; therefore, no increase is anticipated in the approved inflation - adjusted assessment limit. For the Fallon Village Project, City of Dublin Condition of Approval No. 76 required the formation of a Geologic Hazard Abatement District ( "GHAD "). The developer of Fallon Village submitted a Plan of Control to allow the District to permanently monitor and maintain GHAD improvements. The establishment of an assessment level to fund the GHAD responsibilities is described in the Initial Engineer's Report for the Fallon Village CHAD. �1�C17iCIZl7 [�7`I_�7I_ : 1 1/ ► 1 `71 Y:iC : 11/1►117 - \':il �f. The boundaries for the GHAD are shown in the legal description and diagram attached hereto as Exhibits A and B. 4663.101.001 July 3, 2013 -3- uuuuuuuuuui ""GE0 Expect � rrceher)ce r The GHAD's activities are those that are necessary or incidental to the prevention, mitigation, abatement, or control of geologic hazards including construction, maintenance, repair, or operation of any improvement; and the issuance and servicing of bonds issued to finance any of the foregoing. The GHAD provides for the administration and review of facilities within the budgeted limits, including the following services: 1. Oversight of GHAD operations. 2. In conjunction with the County Assessor's Office, setting the annual levying of assessments on the property tax rolls. 3. Engagement of technical professionals to perform the monitoring duties as described in the GHAD Plan of Control. 4. Performance of GHAD maintenance activities in accordance with the GHAD Plan of Control. These maintenance activities include: • Four bioretention cells. • Maintenance and repair of EVA and access roads. • Erosion repairs. • Revegetation and vegetation control, including fire break mowing, weeding and additional hydroseeding as deemed necessary. • Maintenance of wetlands, drainages and habitat within the conservation easement area. • Sediment removal from concrete structures (applies only to open -space catch basins, field inlets, V- ditches and storm drain pipes). • Slope stabilization (includes minor landsliding and debris bench clearing). • Subdrain outfall maintenance. • Open -space storm drain pipe and V -ditch replacement. 4663.101.001 July 3, 2013 -4- uuuuuuuuuui ""GEO Expect � rrceher)ce 5. The GHAD will also have maintenance, monitoring and repair responsibilities for slopes, which will include natural, reconstructed or partially reconstructed landslides. 6. Preparation of annual GHAD budgets. The CHAD- maintained improvements are described in the adopted Fallon Village Plan of Control. In general, these improvements include water quality facilities; debris benches; drainage systems, including concrete v- ditches in open space and on the hillsides; open -space storm drain inlets and outlets; subdrains in open space and creels corridors; reconstructed slopes within the open space area; and access roadways. In addition, the GHAD has responsibilities as a land owner and for conservation easement activities because, as property owner of the open space, the GHAD is obligated to comply with the terms of a Habitat Mitigation and Management Plan approved by the United States Fish & Wildlife Service and the California Department of Fish and Wildlife. As provided in the Initial Engineer's Report, the CHAD- maintained improvements described in Section V are distributed within the Fallon Village boundaries. Maintenance and protection of these improvements provide a special benefit to all residential or non - residential property owners within the Fallon Village CHAD. There is no benefit for properties outside of the district. The Engineer made a finding that these properties within the GHAD receive approximately equal special benefit from the work and improvements within the CHAD. As a result, the GHAD assessment is distributed among all owners of parcels, with residential and non - residential structures. Single - family residential lots are assessed as one unit. Non - residential buildings are assessed per square foot of habitable area. The total number of residential units and non - residential area within the District is then divided into the annual District budget to develop the annual assessment amount. A financial analysis was performed to provide a framework for an operating budget for the on -going abatement, mitigation, prevention and control of geologic hazards within the GHAD boundaries. In preparation of the budget, several factors were considered including: • Site Geology • Proposed Remedial Grading • Proximity of Geologic Hazards to Proposed Residences, Improvements or Structures 4663.101.001 July 3, 2013 -5- uuuuuuuuuui """'GEO Expect � rrceher)ce • Site Access Considerations • Elements Requiring Routine Maintenance, including: 1. Surface Drainage Facilities 2. Graded Slopes 3. Detention Basins 4. Bioretention and other Water Quality Facilities 5. Trails, Fire Breaks and Fences Based on the estimated expenses for on -going operations established in 2007, allowing for a larger (approximately $1,110,000 in current dollars) geologic event at 10 -year intervals and a prudent reserve, a budget was prepared for the purpose of estimating initial assessment levels. In order to establish a reasonable reserve in the early years of the Fallon Village CHAD, there is an initial deferral of GHAD expenses as described in Plan of Control for the Fallon Village development. To allow for the funding of conservation easement activities as shown in Exhibit C, the initial deferral period has been extended from three years to six years. As described in the Plan of Control, the start of the deferral period was triggered after the first residential building permit was issued by the City of Dublin. The first building permit for the Fallon Village GHAD was issued in 2007. For the 2007 /2008 fiscal year, the Engineer recommended and the GHAD Board of Directors approved an annual assessment limit for the Fallon Village development of $488 per detached single - residential unit. The proposed initial assessment level of $488 for detached single - family units has been adjusted annually to reflect the percentage change in the San Francis co- Oaldand -San Jose Consumers Price Index (CPI) for All Urban Consumers. The assessment for the 2012/2013 fiscal year is $541.48, as shown in Exhibit C. The residential and non - residential assessments are levied in conjunction with the issuance of a Final Map for the area containing the non - residential building. 4663.101.001 July 3, 2013 -6- 1 WN no I F9.11"., 4663.101.001 July 3, 2013 HIIIIIIIIIIIIIIIIIIII T. 2 S.,: R. 1 E. NOTE: BEARINGS AND DISTANCES M D i B M WITHOUT AN ASTERISK(*) WERE TAKEN 22 23 FROM RECORD OF SURVEY NO. 1005 ACACIA PARTNERS 27 26 SERIES No. 2DO5-037368 ACACIA PARTNERS APN 905-OOD3-014-03 SERIES No. 2005-037868 APN 985-0028-001 POB .76': GHAD ----- ---- -- -- --- -------- - - - --- N89040'26*W 1485aK --- ! AD- PARCEL - 1 ------- T ---- PARCEL 2 1 N0000911 I"W 1/4 CORNER OF PM 8327 235.96' SECTIONS 26 & 27 BK.298 PM P 14-17 PARCEL 'D' MUEHLHAUSER ---------- N �4>e D,S.R.S.D." if PM 9208 1 SERIES No, 2002-097480 BK292 M PG 16 -17 w APN 905-0003-012 PARCEL B 313.91± AC. No. LLA 07-D1 1: 601 *NOTE: BEARINGS AND DISTANCES WITH SERIES No. 11 �r I PARCEL A CD 1D : SECTION 35 WERE TAKEN FROM AN ASTERISK(*) FOR THE NW 1/4 OF 2007-200946 No. LLA 07-01 SERIES No. 2007-200946 RECORD OF SURVEY NO. 1675* 14.66± AC. D U B L I N *N88043'28"W 2640.61 26® - - -- - - PARCEL 'B' 21 5 1 ,% , 34 3 POB GHAD PARCEL 2 R A N C H GHAD PARCEL I DUBLIN INVESTORS, LLC SERIES No. 2003-108250 m 14 c V) ROS NO. 1675 V) m 25 -c' BK25 R.O.S. PG31-32 C.6 CID, I 'co, APN 905-0002-003 1 C'j 159.54± AC. 0 % 0 GHAD PARCEL 2 Ln �` ` c; 0 PARCEL 'C' C:� b �n b NW 1/4 SECTION 35 U-) z T. 2 S. R. I E. j af PARCEL 'A' > M.D. B. & M. u cwn GHAD PARCEL 5 SEE PAGE 4 N89051'52"W 2651.00- -N88-43'1TW 2631.95'* 1 ____j ----- FIRST AMERICAN TITLE CROAK GUARANTEE CO. SERIES No, 79-229935 SERIES No. 1998-388140 i APN 905-0002-002 1 APN 985-DO27-006 i APN 905-0002-002-01 APN 985-DO27-007 __GHAD PARCELS 3 & 4 I LEGEND: SEE PAGE 3 BOUNDARY LINE. 0' 500' 1000' 2000' - - - - - - - - - - - EXISTING LOT UNE POB POINT OF BEGINNING LOT NE U I NE I BEG E=ff "A" PAGE 1 OF 4 NNNG MACUT & comps MOTS OF FaWN VH1AGE GHO CIVIL ENGINE ERI NG# LAND PtANNING*LAND SURVEYING Pleosanton, CA (925) - 225 -069© SEE EXHIBIT B FOR DESCRIPTION - CITY OF DUBLIN COUNTY OF ALAMEDA CALIFORNIA DRAWN DATE semi I JOB NO. v mw 1 07-13-07 1 r=low 1 1 49 _10 7-13-2007 13:08.130 mwehber P. \ 19149 \Iegols \ CHAD- legals- o veroll \PLA 7EXH181 T. dwg °----- - - - - -- - ----------------------- N39 21-56"W(R) PARCEL B N52039'14"W 39.69' No. LLA07-01 8=291.02' D=49'58'40"---,,_/ SERIES No. L=253.85' N71020'52"E 82.06' 2007-200946 N00039'24"E 140.60'--A N10057'46"W 96.0Y I N14025'13"W 134.28' i N50042'23"W 48,07' N21 °32`1 0 "W 88.40' N71006'39"W 99,04' ! PM 9208 N2 10 23'28" E 2003 1' 1 BK 292 M PG 16-17 313.91± AC, U7° 18'42"E 65.35' N1604110E 51.40' N02018'30" E 81.36' N 17050'10" E 64.19'��-' I - T NOT I 9'22"W 106.46'4 i PARCEL V N17041'12"W 14T 19' N00044'30"W 120.97 N12041'35 W M86'-j- DUBLIN N20D43'33"W 90.89"�� PARCEL A NOT19'39"W 250.02 No. LLA 07-01 R A N C H N10°47'1 1 "W 268.63 SERIES No. 2007-200946 N70051'23"W 49.05' 14.66± AC. R=42.00' D=59'26'40" -- L=43.58' 6 N49041'57'E 122.85' PARCEL V N28007'47"E 284.00' N58052'28"E 11§.88' N53002'51"E 195.67' N69008�4j�'E 31.73" N90000'00"E 58,47' N75022'09"W 45.89' N57°26' 19" E (R) - R= 120.00' PARCEL 'A' D= 19°07'43" R=886.00' D=32031'05" ��% \ L- 40.06' 06' R=150.00' D=54001'09" L=502.85' L= 141.42' N89'57'24" E(R)II N28039'03"W 58.57' N90000'00"W 189,85' R=1100.00' D=5019'52" N70'52'17"W 6.55' L= 102.35' R=80,00' D =11 °47'55" L= 16.47' N30035'37'W 33.48' -N03049'18"E 159.00' ---N22-56'58-W 83.13' -N33045'20"W 128.91' N89051'52"W 2651.00' LEGEND: BACKAY & SOMPS CIVIL ENGINEERING- LAND PLANNING*LAND SURVEYING Pleasanton, CA (92 5) - 225-0690 WN I DATE SCALE I " I 7- I3 -2007 13.1 08'. 30 mwehber P: \19149\legols\GHAD-tegols-overoll\PLATEXHIRIT.dwg =500, 1 19149-10 acid N60°15 1Cr E 31,43' �g N60* 15'1 Cdr* E 8.38' PARCEL 3 c'q o w co %I PARCEL 4 REMAINDER OF PARCEL 18 TRACT 7281 (277 M 82-88) CITY OF DUBLIN 00 PARKSITE PARCEL 8 TRACT 7281 R=237.00' (277 M 82-88) A=9'20'51* 60' EXISTING RIGHT L=38.67' OF WAY EASEMENT FOR FALLON ROAD. AREAS: PARCEL 3=4,645± SK PARCEL 4=10,082± SF. LEGEND: POEI POINT OF BEGINNING V !Lo I U-i SCALE. 1'=60' Nao-679, W 1 45 rq I m E=IT "A" PAGE 3 OF 4 MAGInflu"AY & SOMPS LDM OF FALLON VILLAGE GHAD CIVIL ENCINEERINGo LAND PLANNING&LAND SURVEYING SEE EXHIBIT B FOR DESCTIPTION Pleasonton, CA (925) - 225-0690 DRAWN I DATE scu I JOB No. CITY OF DUBLIN, COUNTY OF ALAMEDA, CALIFORNIA JTM/AM8 1 03-21-07 1 1'=60' 1 19144 -11 7- IJ-2007 IJ.-57.•JJ mwehber P:\fP149\legols\GHAD-legols-overoll\GHADPARCELS1&2.dwg i R=800.55' A=3°30'34- J' L=49.04' W POB PARCEL 3 & PARCEL 4 C:� oco 1-5 co QC13 I m E=IT "A" PAGE 3 OF 4 MAGInflu"AY & SOMPS LDM OF FALLON VILLAGE GHAD CIVIL ENCINEERINGo LAND PLANNING&LAND SURVEYING SEE EXHIBIT B FOR DESCTIPTION Pleasonton, CA (925) - 225-0690 DRAWN I DATE scu I JOB No. CITY OF DUBLIN, COUNTY OF ALAMEDA, CALIFORNIA JTM/AM8 1 03-21-07 1 1'=60' 1 19144 -11 7- IJ-2007 IJ.-57.•JJ mwehber P:\fP149\legols\GHAD-legols-overoll\GHADPARCELS1&2.dwg EXHIBIT "Apt n 992wsmilmome ol 25, 50' 100, SCALE: 1'=50' ull 1.0 \ 19 70 -,- 3 rh 20 21 22 m LEGEND: POB POINT OF BEGINNING A - — -- — -- N2�13 55*W 24.09' GHAD PARCEL 5 LOA 4,5821 SQ. Fr. .a s 11 AC.) 70 3> Ell) 01 Fn 8 010 h!87O02 Er IKRj FIRST AFRICAN TITLE Rr GUARANTY COMPANY APN 985-0027-007 -- E���o / DOC# 1998-388140 (JORDAN RANCH) 0, col E)MIBFr "A" PAGE 4 OF 4 a Vav limonAl & sumps LEMITS OF FALLON MI AGE GRAD CIVIL ENGINEERING• LAND PLANNINGoLAND SURVEYING SEE EXHIBIT B FOR DESCRIPTION Pleosonton, CA (925) - 225-0690 CITY OF DUBLIN, COUNTY OF ALAMEDA, CALIFORNIA DATE �� JOB ' No. 9 WHW I I =50' 1 19149-10 7-13-2007 14:16:02 -.ehbw A \19149\ehbits\19149-10-CXHIBIrS\,Aordon-AGWT-exhibils\EXHIBIF-E-FirstAmerican-to-C)rY OF DUNLWdwg IMINI Fffii �1� 4663.101.001 July 3, 2013 HIIIIIIIIIIIIIIIIIIII lip . u 0 19149 -10 7/13/2007 MW Page I of 6 ALL THAT CERTAIN REAL PROPERTY SITUATED IN CITY OF DUBLIN, COUNTY OF ALAMEDA, STATE OF CALIFORNIA, BEING ALL OF THE NORTHWEST QUARTER OF SECTION 35 AS DESCRIBED IN SERIES No. 2003 - 108250, ALAMEDA COUNTY RECORDS, AS WELL AS A PORTION OF THE SOUTH HALF OF SECTION 27 AND A PORTION OF THE NORTH HALF OF SECTION 34, TOWNSHIP 2 SOUTH, RANGE 1 EAST, MOUNT DIABLO BASE AND MERIDIAN, MORE PARTICULARLY DESCRIBED AS FOLLOWS: BEGINNING AT THE COMMON QUARTER CORNER OF SECTIONS 26 AND 27 AS SHOWN ON PARCEL MAP 9208, RECORDED IN BOOK 292 OF MAPS PAGES 16 -17, ALAMEDA COUNTY RECORDS; THENCE ALONG THE SECTION LINE OF SECTIONS 26 AND 27, SAID SECTION LINE BEING ALSO THE WESTERLY LINE OF THE MUEHLHAUSER TRUST, SERIES No. 2002- 097480, ALAMEDA COUN'T'Y RECORDS, SOUTH 00 °48'41" WEST 2,642.65 FEET, TO THE COMMON SECTION CORNER OF SECTIONS 26, 27, 34, AND 35; THENCE ALONG THE COMMON SECTION LINE OF SECTIONS 34 AND 35, SAID SECTION LINE BEING ALSO THE WESTERLY LINE OF DUBLIN INVESTORS, LLC, SERIES No. 2003 - 108250, ALAMEDA COUNTY RECORDS, SOUTH 00 °44'28" WEST 2,635.93 FEET, TO THE COMMON QUARTER CORNER OF SECTIONS 34 AND 35; THENCE ALONG THE EAST -WEST QUARTER SECTION LINE ENTERING SECTION 34, SAID EAST -WEST QUARTER SECTION LINE BEING ALSO THE NORTHERLY LINE OF FIRST AMERICAN TITLE GUARANTEE CO., SERIES No. 1998 - 388140, ALAMEDA COUNTY RECORDS, NORTH 89 °51'52" WEST 2,651.00 FEET; THENCE LEAVING SAID EAST -WEST QUARTER SECTION LINE ALONG THE WESTERLY LINES OF PARCEL "A" OF SAID PARCEL MAP 9208, THE FOLLOWING SIX (6) COURSES: 1) NORTH 33 °45'20" WEST 128.91 FEET; 2) NORTH 22 °56'58" WEST 83.13 FEET; 3) NORTH 10 °41'42" WEST 61.76 FEET; 4) NORTH 03 °58'13" WEST 101.75 FEET; 5) NORTH 03 °49'18" EAST 159.00 FEET; 6) NORTH 30 °35'37" WEST 33.48 FEET; THENCE LEAVING SAID WESTERLY LINE OF PARCEL "A" ALONG THE WESTERLY LINE OF PARCEL "A ", PER No. LLA 07 -01 SERIES No. 2007 - 200946, ALAMEDA COUNTY RECORDS THE FOLLOWING THIRTY -NINE (39) COURSES: 1) SOUTH 66 °40'50" WEST 92,39 FEET TO A NON - TANGENT CURVE; 2) THENCE ALONG SAID NON - TANGENT CURVE TO THE LEFT, FROM WHICH THE RADIUS POINT BEARS SOUTH 66 040'50" WEST, HAVING A RADIUS OF 1,100.00 FEET; THROUGH A CEN'T'RAL ANGLE OF 05 019'52 ", FOR AN ARC DISTANCE OF 102.35 FEET; PAI 9149\3 e gal stGH AD -1 e gal s -o vemll\LEGAL -O V ERAI,I„ doe 19149-10 7/13/2007 MW Page 2 of 6 3) NORTH 28-39T3' WEST 58.57 FEET TO A POINT OF CURVATURE; 4) THENCE ALONG A TANGENT CURVE TO THE RIGHT HAVING A RADIUS OF 80.00 FEET, THROUGH A CENTRAL ANGLE OF 1104755", FOR AN ARC DISTANCE OF 16.47 FEET; TO A POINT OF REVERSE CURVATURE; 5) THENCE ALONG SAID REVERSE CURVE TO THE LEFT HAVING A RADIUS Of 150.00 FEET, THROUGH A CENTRAL ANGLE OF 54001'09", FOR AN ARC DISTANCE OF 141.42 FEET; 6) NORTH 70-5217" WEST 6.55 FEET TO A POINT OF CURVATURE; 7) THENCE ALONG A TANGENT CURVE TO THE LEFT HAVING A RADIUS OF 120.00 FEET, THROUGH A CENTRAL ANGLE OF 19-07'43", FOR AN ARC DISTANCE OF 40.06 FEET; 8) NORTH 90'00'00" WEST 189.85 FEET TO A NON-TANGENT CURVE, 9) THENCE ALONG SAID NON-TANGENT CURVE TO THE LEFT, FROM WHICH THE RADIUS POINT BEARS SOUTH 89057'24" WEST, HAVING A RADIUS OF 986.00 FEET; THROUGH A CENTRAL ANGLE OF 32 °31'05 ", FOR AN ARC DISTANCE OF 502.85 FEET; 10) NORTH 53 '02'5 1 " EAST 195.67 FEET; 11) NORTH 28-07'47" EAST 284.00 FEET; 12) NORTH 49-4 F57" EAST 122.85 FEET-, TO A POINT OF CURVATURE; 13) THENCE ALONG A TANGENT CURVE TO THE RIGHT HAVING A RADIUS OF 42.00 FEET, THROUGH A CENTRAL ANGLE OF 59-26'40", FOR AN ARC DISTANCE OF 43.58 FEET, 14) SOUTH 70 °51'23" EAST 49.05 FEET; 15) SOUTH 75-22'09" EAST 45.89 FEET; 16) NORTH 90'00'00" EAST 58.47 FEET; 17) NORTH 69-08'47" EAST 31.73 FEET; 18) NORTH 58-52-28" EAST 119.88 FEET-, 19) NORTH 10-47'11" WEST 268.63 FEET; 20) NORTH 07 °19'39" WEST 250.02 FEET; 21) NORTH 20-43'33" WEST 90.89 FEET; 22) NORTH 12 °41'35" WEST 30.86 FEET; 23) NORTH 00-44'30" WEST 120.97 FEET; 24) NORTH 17 °41' 1 2" WEST 147.19 FEET; 25) NORTH 00-19-22" WEST 106,46 FEET; 26) NORTH 17'50'10" EAST 64.19 FEET; P:U9 149legals\GHAD-legals-overall\LEGAL-OVERALL.doe 19149-10 7/13/2007 MW Page 3 of 6 27) NORTH 02-18'30" EAST 81.36 FEET; 28) NORTH 16.4I'10" EAST 51.40 FEET; 29) NORTH 37 °18'42" EAST 65.35 FEET; 30) NORTH 21-23'28" EAST 200.71 FEET; 31) NORTH 71-06'39" WEST 99.04 FEET; 32) NORTH 50-42'23" WEST 48.07 FEET; 33) NORTH 21 °32'10" WEST 88.40 FEET; 34) NORTH 14-25'13" WEST 134.28 FEET; 35) NORTH 10-5746"WEST 96.03 FEET; 36) NORTH 00-39'24" EAST 140.60 FEET TO A POINT OF CURVATURE; 37) THENCE ALONG A TANGENT CURVE TO THE RIGHT HAVING A RADIUS OF 291.02 FEET, THROUGH A CENTRAL ANGLE OF 49-5840", FOR AN ARC DISTANCE OF 253.85 FEET; 38) NORTH 71-20-52" EAST 82.06 FEET; 39) SOUTH 52-39-14" EAST 39.69 FEET; TO THE WESTERLY LINE OF PARCEL "D" OF SAID PARCEL " 9208; THENCE ALONG SAID WESTERLY LINE OF PARCEL "D" THE FOLLOWING TWO (2) COURSES: 1) NORTH 48-46-28" EAST 1,739.56 FEET; 2) NORTH 00-09'11" WEST 235.96 FEET TO A POINT ON THE QUARTER SECTION LINE OF SECTION 27, SAID SECTION LINE BEING ALSO THE SOUTHERLY LINE OF ACACIA PARTNERS, SERIES No. 2005-037868, ALAMEDA COUNTY RECORDS, AND THE NORTHERLY LINE OF SAID PARCEL "D"; THENCE ALONG SAID QUARTER SECTION LINE SOUTH 89-40'26" EAST 1,485.76 FEET, TO THE POINT OF BEGINNING, CONTAINING 328.57 ACRES, MORE OR LESS. PARCEL BEGINNING AT THE COMMON CORNER OF SECTIONS 26, 27, 34, AND 35 THENCE ALONG THE SECTION LINE OF SECTIONS 26 AND 35, SAID SECTION LINE ALSO BEING THE SOUTHERLY LINE OF THE MUEHLHAUSER TRUST, RECORDED IN SERIES No. 2002-097480, ALAN EDA COUNTY RECORDS, SOUTH 88-43'28" EAST 2640.61 FEET TO THE NORTH QUARTER CORNER OF SECTION 35; THENCE ALONG THE NORTH-SOUTH QUARTER SECTION LINE OF SECTION 35, SAID QUARTER SECTION LINE BEING ALSO THE WESTERLY LINE OF ACACIA PARTNERS, RECORDED IN SERIES No. 2005-037867, ALAN4EDA COUNTY RECORDS, SOUTH 00155'27" WEST 2636.26 FEET TO THE CENTER QUARTER CORNER OF SECTION 35; PAI 9 149\1 egals\GHAD-1 c gal 9-overall\LEGAL-0VTRALL, do c 19149-10 7/13/2007 mw Page 4 of 6 THENCE ALONG THE EAST-WEST QUARTER SECTION LINE OF SECTION 35, SAID QUARTER SECTION LINE BEING ALSO THE NORTHERLY LINE OF CROAK, RECORDED IN SERIES No. 79- 229985,ALAI,,EDA COUNTY RECORDS; NORTH 88'43'19" WEST 2631.95 FEET TO THE WEST QUARTER CORNER OF SECTION AND 35; THENCE ALONG THE COMMON SECTION LINE OF SECTIONS 34 AND 35, BEING ALSO THE EASTERLY LINE OF PARCELS "C" AND "D" OF PARCEL MAP 9208, BOOK 292 OF MAPS PAGES 16-17, ALAMEDA COUNTY RECORDS; NORTH 00'44'09" EAST 2636.21 FEET TO THE POINT OF BEGINNING. BEARINGS, DISTANCES AND AREA CALCULATION ARE BASED ON RECORD OF SURVEY No. 1675, BOOK 25 RECORD OF SURVEYS PAGES 31-32 ALAMEDA COUNTY RECORDS. CONTAINING 159.54 ACRES, MORE OR LESS. PARCEL ALL THAT CERTAIN REAL PROPERTY SITUATED IN THE CITY OF DUBLIN, COUNTY OF ALAMEDA, STATE OF CALIFORNIA, BEING A PORTION OF FALLON ROAD AS SHOWN ON TRACT MAP 7281, FILED SEPTEMBER 3, 2004 IN BOOK 277 OF MAPS PAGES 92-88, AND TRACT MAP 7142 FILED AUGUST 21, 2001 IN BOOK 261 OF MAPS PAGES 5-10, ALAMEDA COUNTY RECORDS, MORE PARTICULARLY DESCRIBED AS FOLLOWS: BEGINNING AT THE NORTHEAST CORNER OF PARCEL 18 AS SHOWN ON SAID TRACT MAP 7281, THENCE ALONG THE NORTHERLY LINE OF SAID PARCEL 18, COINCIDENT WITH THE SOUTHERLY LINE OF FALLON ROAD, ALONG A CURVE TO THE LEFT WITH A RADIUS OF 1360.00 FEET, FROM WHICH THE RADIUS POINT BEARS SOUTH 43-11'36" WEST, THROUGH A CENTRAL ANGLE OF 04006'24", FOR AN ARC DISTANCE OF 97.48 FEET; THENCE LEAVING SAID NORTHERLY LINE, AND ENTERING SAID FALLON ROAD, THE FOLLOWING 4 COURSES: 1) NORTH 60-15'10" EAST 31.43 FEET, 2) ALONG A TANGENT CURVE TO THE LEFT WITH A RADIUS OF 466.00 FEET, THROUGH A CENTRAL ANGLE OF 09005'56" FOR AN ARC DISTANCE OF 74.00 FEET TO THE CENTERLINE OF OLD FALLON ROAD, A 60 FOOT RIGHT OF WAY; 3) THENCE ALONG SAID CENTERLINE ALONG A NON TANGENT CURVE TO THE LEFT WITH A RADIUS OF 800.55 FEET, FROM WHICH THE RADIUS POINT BEARS SOUTH 80009'45" EAST, THROUGH A CENTRAL ANGLE OF 03030'34", FOR AN ARC DISTANCE OF 49.04 FEET; 4) THENCE SOUTH 06-19'16" WEST 73.27 FEET TO THE POINT OF BEGINNING. CONTAINING 4,645 SQUARE FEET MORE OR LESS. PARCEL ALL THAT CERTAIN REAL PROPERTY SITUATED IN CITY OF DUBLIN, COUNTY OF ALAMEDA, STATE OF CALIFORNIA, BEING PARCEL 18 AS SHOWN ON TRACT MAP 7281, RECORDED IN BOOK 277 OF MAPS PAGES 82-88, ALAMEDA COUNTY RECORDS, EXCEPTING FROM SAID PARCEL 18 THAT PORTION CONVEYED TO THE CITY OF DUBLIN AS DESCRIBED IN SERIES No. ALAMEDA COUNTY RECORDS, P:\l 9149\legalskGHAD-legals-overall\LF-GAL-OVPBALL. doe 19149-10 7/13/2007 MW Page 5 of 6 PARCEL 4 BEING MORE PARTICULARLY DESCRIBED AS FOLLOWS: BEGINNING AT THE NORTHEAST CORNER OF PARCEL 18 AS SHOWN ON SAID TRACT MAP 7281, THENCE ALONG THE NORTHERLY LINE OF SAID PARCEL 18, COINCIDENT WITH THE SOUTHERLY LINE OF FALLON ROAD, ALONG A CURVE TO THE LEFT WITH A RADIUS OF 1360.00 FEET, FROM WHICH THE RADIUS POINT BEARS SOUTH 43011'36" WEST, THROUGH A CENTRAL ANGLE OF 04006'24", FOR AN ARC DISTANCE OF 97.48 FEET, TO THE EASTERLY LINE OF THE PORTION CONVEYED TO THE CITY OF DUBLIN IN SERIES No. ALAMEDA COUNTY RECORDS; THENCE LEAVING SAID NORTHERLY LINE AND ALONG SAID EASTERLY LINE THE FOLLOWING FOUR (4) COURSES: 1) SOUTH 60-15'10" WEST 8.38 FEET; TO A TANGENT CURVE; 2) ALONG SAID TANGENT CURVE TO THE LEFT HAVING A RADIUS OF 28.00 FEET, THROUGH A CENTRAL ANGLE OF 85049'59"; FOR AN ARC DISTANCE OF 41.95 FEET; TO A POINT OF REVERSE CURVATURE; 3) ALONG SAID REVERSE CURVE TO THE RIGHT HAVING A RADIUS OF 1,073,00 FEET, THROUGH A CENTRAL ANGLE OF 09041'14", FOR AN ARC DISTANCE OF 181.42 FEET-, TO A POINT OF COMPOUND CURVATURE; 4) ALONG SAID COMPOUND CURVE TO THE RIGHT HAVING A RADIUS OF 237.00 FEET, THROUGH A CENTRAL ANGLE OF 09020'51", FOR AN ARC DISTANCE OF 38.67 FEET, TO THE EASTERLY LINE OF SAID PARCEL 18; THENCE ALONG SAID EASTERLY LINE NORTH 06019'16" EAST 184.91 FEET, TO THE POINT OF BEGINNING. CONTAINING 10,082 SQUARE FEET, MORE OR LESS PARCEL., 5 ALL THAT CERTAIN REAL PROPERTY SITUATED IN THE CITY DUBLIN, COUNTY OF ALAMEDA, STATE OF CALIFORNIA, BEING A PORTION OF THE PROPERTY OF FIRST AMERICAN TITLE GUARANTY COMPANY, A CALIFORNIA CORPORATION, UNDER HOLDING AGREEMENT No. 592930, AS DESCRIBED AND RECORDED IN SERIES NO. 1999-388140, ALAMEDA COUNTY RECORDS AND BEING MORE PARTICULARLY DESCRIBED AS FOLLOWS: BEGINNING AT THE NORTHWESTERLY CORNER OF SAID FIRST AMERICAN PROPERTY, THENCE ALONG THE NORTHERLY LINE OF SAID PROPERTY, SOUTH 89'51'52" EAST 86,66 FEET; THENCE LEAVING SAID NORTHERLY LINE AND ENTERING SAID PROPERTY, SOUTH 22021,461, WEST 136.08 FEET TO A POINT ON THE WESTERLY LINE OF SAID FIRST AMERICAN PROPERTY; THENCE ALONG SAID WESTERLY LINE THE FOLLOWING TWO (2) COURSES: 1) ALONG A NON-TANGENT CURVE TO THE LEFT, WITH A RADIUS OF 199.76 FEET, FROM WHICH THE RADIUS POINT BEARS NORTH 87"02'08" WEST; THROUGH A CENTRAL ANGLE OF 31 -1 P45", FOR AN ARC DISTANCE OF 108.76 FEET: 2) NORTH 28-13'53" WEST 24.09 FEET; TO THE POINT OF BEGINNING P:\19149'legals\GH AD -legal s-ovrrall\LEGAL-OVERALL.doe 19149-10 7/13/2007 MW Page 6 of 6 CONTAINTNG 4,582 SQUARE FEET, MORE OR LESS. 07109��� END OF DESCRIPTION. MACIQY & SOMPS CML ENGINEERING• LAND PLANNING • LAND SURVEYING 5142 Franklin Drive Suite B, Pleasanton, C& 94588-3355 (925) 225-0690 PAI 9149\legal s\CTRAD-legals-overall\LEGA.L-OVERALL.doc IMINI Fallon Village GHAD Budget 4663.101.001 July 3, 2013 HIIIIIIIIIIIIIIIIIIII Expec� Ex(.,(:0(3iu,,e EXHIBIT C Fallon Village Geologic Hazard Abatement District Budget — July 3, 2013 ASSUMPTIONS uuuouuuuuui uui1 \ E'yepe P I'�' Total No. of Single Family Residential Units 1,043 Annual Assessment per Unit (FY 2012/2013 $) $541.48 Approximate Total Non - Residential Building Area (square feet) 30,500 Annual Assessment for Non - Residential ($ /square feet) $0.0555 Annual Adjustment in Assessment (estimated) 3.0% Inflation (estimated) 3.0% Investment Earnings (estimated) 5.5% Frequency of Large -Scale Repair (years) 10 Cost of Large -Scale Repair (current $) $1,109,660 ESTIMATED ANNUAL EXPENSES IN 2012/2013 DOLLARS Administration and Accounting $ 73,959 Professional Services $ 15,535 Onsite Conservation Easement Activities' $ 11,097 Maintenance and Operation $ 41,057 Slope Stabilization and Erosion Protection $ 61,031 Bioretention Cell Maintenance and Repair $ 78,786 Capital Improvements $ 50,711 Major Repair (Annualized) $110,966 Miscellaneous & Contingency (10 %) $ 43,205 TOTAL 486 347 1 Not included in Initial Engineer's Report. Added as an expense in 2013 to fund conservation easement and maintenance agreement activities. 4663.101.001 July 3, 2013