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Home My WebLink AboutStaff Report 2512-5620CITY OF PALO ALTO CITY COUNCIL Special Meeting Monday, June 15, 2026 Council Chambers & Hybrid 5:30 PM Agenda Item 16.PUBLIC HEARING / QUASI-JUDICIAL. 929 Laurel Glenn Dr [25PLN-00005]: Adoption of a Record of Land Use Action Approving a Major Site and Design Application for the Construction of a New 6,581-Square-Foot Single-Family Residence and Associated Site Improvements on a Vacant 4.23-Acre Site. CEQA Status: Exempt Per CEQA Guidelines Section 15303. Zoning District: Open Space (OS). City Council Staff Report From: City Manager Report Type: CONSENT CALENDAR Lead Department: Planning and Development Services Meeting Date: June 15, 2026 Report #:2512-5620 TITLE PUBLIC HEARING / QUASI-JUDICIAL. 929 Laurel Glenn Dr [25PLN-00005]: Adoption of a Record of Land Use Action Approving a Major Site and Design Application for the Construction of a New 6,581-Square-Foot Single-Family Residence and Associated Site Improvements on a Vacant 4.23-Acre Site. CEQA Status: Exempt Per CEQA Guidelines Section 15303. Zoning District: Open Space (OS). RECOMMENDATION Staff recommend the City Council: 1. Consider the project exempt pursuant to CEQA Guidelines Section 15303; and 2. Adopt the Record of Land Use Action approving the Major Site and Design Review application for a New Single-Family Residence and Associated Site Improvements on a Vacant lot (Attachment B). EXECUTIVE SUMMARY The applicant requests approval of a Major Site and Design Review application for a new two- story residence on a vacant 4.23-acre site in the Open Space (OS) zoning district. Site and Design Review1 provides a process to evaluate development in environmentally and ecologically sensitive areas, ensuring that projects are harmonious with surrounding uses, compatible with environmental objectives, and consistent with the Palo Alto Comprehensive Plan. Single-family residences in the OS district are reviewed by the Planning and Transportation Commission (PTC), which forwards a recommendation to the City Council. On February 11, 2026, the PTC recommended approval of the project, with conditions, as detailed further in this report. The project is exempt from the California Environmental Quality Act pursuant to CEQA Guidelines Section 15303. 1 More information about Site and Design reviews is available online from the City’s published zoning code regulations: https://codelibrary.amlegal.com/codes/paloalto/latest/paloalto_ca/0-0-0-79449 BACKGROUND 3,4 The PTC’S motion included the following recommendations: 5 (Note: The Bird-Friendly Design Ordinance was approved by Council on March 16, 2026, and, following the second reading, became effective May 7, 2026). DISCUSSION 3 Link to February 11, 2026 PTC meeting staff report: https://recordsportal.paloalto.gov/WebLink/DocView.aspx?id=85394&dbid=0&repo=PaloAlto 4 Link to February 11, 2026 PTC meeting summary minutes: https://cityofpaloalto.primegov.com/Public/CompiledDocument?meetingTemplateId=19282&compileOutputType=1 5 Bird-Friendly Design Ordinance: https://www.paloalto.gov/Departments/Planning-Development-Services/Current- Planning/Ordinances-Maps-Guidelines-Standards/Bird-Friendly-Design-Ordinance guidelines for this area. Overall staff finds that the project is consistent with these requirements, as detailed further below. The project is consistent with Policies N-1.1, N-1.2, and N-1.3 because development is clustered on the flattest portion of the site, substantial areas of private open space are retained, and removed trees are replaced with native oak species in accordance with the City’s Tree Technical Manual, supporting habitat value, ecological continuity and wildlife habitat. The project is consistent with Policies N-1.4, N-1.5, and N-1.6, the residence is sited more than 500 feet from Arastradero Creek, outside riparian corridors, and avoids direct disturbance to creek resources and special-status habitats. Project review ensures construction and operation would not adversely affect sensitive biological resources. The project aligns with Policies N-1.8 and N-1.9 addressing the natural character of the foothills. The residence is located away from ridgelines and hilltops, oriented parallel to Laurel Glen Drive, and set back approximately 74 feet from the roadway. Building massing follows natural topography, grading is minimized, and access is provided via a rural-style permeable concrete and concrete driveway, reducing visual prominence and impervious surface area. Exterior materials and colors are subdued, exterior lighting is low-intensity and shielded, and existing vegetation, including protected trees, is retained to the extent feasible to ensure the project visually blends with its surroundings. development is designed to minimize environmental impacts and maintain compatibility with the surrounding natural setting. As detailed in Attachment C, staff finds the proposed project consistent with the applicable development standards of the OS zoning district, including allowable land use, site design, and environmental performance criteria. Exterior Colors and Visual Camouflage: The PTC recommended that the applicant work with neighboring property owners to ensure that exterior colors are sufficiently subdued to reduce the building’s visual prominence. Following further coordinate and feedback from the neighbor in response to the PTC’s recommendation, the applicant revised the proposed stucco palette to incorporate muted earth-tone colors designed to blend with the surrounding topography and vegetation. Lighting Ordinance Compliance: The PTC recommended compliance with the recently adopted Ordinance No. 5692 and consideration of interior light spillage. The applicant has revised the lighting plan to include fully shielded, downward-directed fixtures and reduced lumen outputs consistent with the new lighting ordinance requirements. Bird-Safe Design Measures: The PTC recommended incorporation of bird-safe design measures consistent with the intent of the draft Bird-Friendly Building Ordinance. In particular, the PTC identified large, uninterrupted glass surfaces (e.g., windows W15 and W10, and doors D1, D5, and D6) as potential bird hazards and recommended treatment to reduce reflectivity and transparency. The Commission also emphasized avoiding “fly- through” conditions, particularly at building corners and guardrail locations. Glass guardrails were noted as a higher-risk feature, and the PTC encouraged consideration of alternative materials or bird-friendly treatments, such as cable railings or patterned glazing. In response, the applicant has revised the project to incorporate bird-safe glazing treatments at identified hazard locations (corners) and provided details for guardrail materials that are consistent with bird-safe design principles. Staff finds that the proposed modifications to the plan to revise the color scheme address the PTC’s recommendation. Though adherence to the lighting and bird safe design ordinances is not required by code as the project was deemed complete prior to adoption, the applicant has modified the lighting in compliance with the City’s recently adopted lighting ordinance9 and incorporated bird-safe treatments on identified hazard areas in response to the PTC’s recommendations. Because these changes were incorporated into the revised plan sets, staff has not incorporated these as conditions of approval. FISCAL/RESOURCE IMPACT Processing of this application has no fiscal impact on the City, as the applicant is responsible for all staff and consultant costs through the deposit-based cost recovery program. The project would be required to pay applicable Development Impact Fees, which are currently estimated at $148,650.61. Public art fees and housing impacts fees do not apply as single-family residences are exempt from these fees. STAKEHOLDER ENGAGEMENT The Palo Alto Municipal Code requires notice of this public hearing be published in a local paper and mailed to owners and occupants of property within 600 feet of the subject property at least ten days in advance. Notice of a public hearing for this project was published in the Daily Post and postcard mailing occurred on June 5, 2026, which is 10 days in advance of the meeting. Public Comments As of the date of this report, no additional public comments on the proposed project have been received beyond those submitted prior to the PTC’s February 11, 2026 hearing (Attachment D). 9 Ordinance 5692 is available online at: https://recordsportal.paloalto.gov/WebLink/DocView.aspx?id=85311&dbid=0&repo=PaloAlto ENVIRONMENTAL REVIEW The project has been evaluated in accordance with the California Environmental Quality Act (CEQA), the State CEQA Guidelines, and City environmental regulations. The project qualifies for a Class 3 Categorical Exemption (CEQA Guidelines Section 15303). None of the exceptions listed in CEQA Guidelines Section 15300.2 apply. ATTACHMENTS Attachment A: Location Map Attachment B: Draft Record of Land Use Action Attachment C: Zoning Comparison Table Attachment D: Public Comments Attachment E: Applicant’s Project Description and Supporting Documents Attachment F: Project Plans and CEQA APPROVED BY: Jonathan Lait, Planning and Development Services Director L A U R E L GLEN DR I V E920 928 925 950 954 936 945 930 937 933 931 920 1691 938 928 928 925 925 950 950 954 936 936 930 930 945 937 937 933 933 931 931 3000 920 928 925 950 954 936 929 945 930 937 933 931 920 1691 938 928 928 925 925 950 950 954 936 936 930 930 945 937 937 933 933 931 931 3000 This map is a product of the City of Palo Alto GIS This document is a graphic representation only of best available sources. Legend abc Easement (CG) abc Address Label (AP) 0'114' ATTACHMENT A LOCATION MAP 929 LAUREL GLEN DRIVE CITYOF PALOALTO I NC O R P O R A TED CALIFORNIA P a l o A l t o T h e C i t y o f APRIL 1 6 1894 The City of Palo Alto assumes no responsibility for any errors. ©1989 to 2016 City of Palo Alto kpaulau, 2026-01-05 10:12:26 (\\cc-maps\Encompass\Admin\Meta\View.mdb) Parcel 99 1199 11 OS RE Page 1 ATTACHMENT B DRAFT APPROVAL NO. ____-2026 RECORD OF THE COUNCIL OF THE CITY OF PALO ALTO LAND USE ACTION FOR 929 LAUREL GLEN DRIVE: SITE & DESIGN [FILE NO. 25PLN-00005] On __________, the City Council held a duly noticed public hearing and, after considering all of the evidence presented, approved the Site and Design Application to allow construction of 6,581-square-foot single-family residence and associated site improvements on a vacant 4.23-acre site located at 929 Laurel Glen Drive, making the following findings, determination, and declarations: SECTION 1. BACKGROUND. The City Council of the City of Palo Alto (“City Council”) finds,determines, and declares as follows: A. On January 8, 2025, Daniel Hruby, on behalf of VRchitects, Inc, applied for a Site and Design application to allow construction of a new 6,581-square-foot single-family residence and associated site improvements on a vacant 4.23-acre site. (“The Project”). B. Staff has determined that the proposed project is in compliance with the applicable Open Space development standards per Palo Alto Municipal Code (PAMC) Section 18.28.050. C. Following staff review, the Planning and Transportation Commission (Commission) reviewed the project design on February 11, 2026, and recommended approval with recommendations. D. On June 15, 2026, the City Council reviewed the project design. After hearing public testimony, the Council voted to ____________ the project subject to the conditions set forth in Section 4 of this Record of Land Use Action. SECTION 2. ENVIRONMENTAL REVIEW. In conformance with the California Environmental Quality Act (CEQA) Class 3 Categorical Exemption Pursuant to Section 15303, the Project is exempt from CEQA and none of the Exceptions to the Categorical Exemption Listed in CEQA Guidelines Section 15300.2 apply to the proposed project. SECTION 3. SITE AND DESIGN OBJECTIVES. The design and architecture of the proposed improvements, as conditioned, complies with the Site and Design Objectives, as required per PAMC Section 18.30(G).060. A. Objective (a): To ensure construction and operation of the use in a manner that will be orderly, harmonious, and compatible with existing or potential uses of adjoining or nearby sites. Page 2 The proposed use is a single-family house in the Open Space (OS) zoning district, on a vacant lot adjacent to other existing single-family residential uses. The proposed construction, as conditioned, complies with the development standards of the OS District in addition to all Municipal Code requirements that help to maintain order and compatibility with surrounding uses, including, but not limited to, noise, parking, and fire safety regulations. Therefore, construction and operation of the use will be orderly, harmonious, and compatible with existing or potential uses of adjoining or nearby sites. B. Objective (b): To ensure the desirability of investment, or the conduct of business, research, or educational activities, or other authorized occupations, in the same or adjacent areas. The proposed single-family residential use is a permitted use in the OS zoning district that complies with all applicable development standards of the district, similar to the surrounding residential uses. Therefore, the project will not affect the desirability of adjacent areas. C. Objective (c): To ensure that sound principles of environmental design and ecological balance shall be observed. The Open Space (OS) zoning district requires that development observe sound principles of environmental design and ecological balance. The proposed project is consistent with these objectives by preserving existing vegetation and landforms to the maximum extent feasible, minimizing grading through the use of natural site contours, limiting development to less densely vegetated areas, and employing earth-toned colors and materials that are compatible with the surrounding natural environment. The residence is sited to reduce visual prominence, with views from public areas largely screened by existing mature vegetation, and the residence is designed to avoid adverse privacy impacts. Architectural materials include wood siding, wood-clad openings, and subdued finishes that blend with the landscape. In addition, the building location and retention of slopes and mature vegetation provide natural buffers that help protect wildlife habitat, particularly in proximity to the nearby creek corridor. D. Objective (d): To ensure that the use will be in accord with the Palo Alto Comprehensive Plan. This property is located within the Open Space/Controlled Development land use designation which allows single-family uses at the proposed density. The intention of this designation in this location is to protect, preserve, and permit the reasonable use of open space land. The new residence is located on a vacant parcel on an existing cul-de-sac with full paved street access and existing utilities. Although the site is located near a creek, the creek corridor is located a substantial distance from the proposed residence. The house is situated on a relatively flat portion of the site. The project proposes no changes in use that would affect its conformance with the Comprehensive Plan. Page 3 SECTION 4. OPEN SPACE REVIEW CRITERIA. The following criteria shall be considered in the Site and Design review of all development of land in the OS district, as outlined in the Natural Environment Element of the Comprehensive Plan: 1. The development should not be visually intrusive from public roadways and public parklands. As much as possible, development should be sited so it is hidden from view. The proposed structure is located in a naturally low, flatter portion of the property. The development will be hidden from view of Laurel Glen Drive, which has a higher elevation, due to the grade differential and substantial setback from the roadway. The house is also hidden from Arastradero Creek Trail by both elevation and mature trees. 2. Development should be located away from hilltops and designed to not extend above the nearest ridgeline. The residence is located on a lower portion of the property, away from hilltops, and does not extend above the nearest ridgeline. The design follows the natural slope and, together with existing trees, ensures the building remains visually subordinate to the surrounding topography. 3. Site and structure design should take into consideration impacts on privacy and views of neighboring properties. The residence is designed and sited to minimize impacts on neighboring privacy and preserve views. Upper-level windows and decks are oriented away from adjacent homes, and existing trees and landscaping provide additional screening to reduce potential privacy or view impacts. 4. Development should be clustered, or closely grouped, in relation to the area surrounding it to make it less conspicuous, minimize access roads, and reduce fragmentation of natural habitats. The proposed development is proposed for a small section of the overall 4.23-acre site. One driveway/access road will provide access to the residence and is located near existing development on neighboring residential properties. The project does not propose multiple buildings and is concentrated to a single area on the site, avoiding densely vegetated areas. 5. Built forms and landscape forms should mimic the natural topography. Building lines should follow the lines of the terrain, and trees and bushes should appear natural from a distance. The residence and hardscape are designed to follow the natural slope of the site, with building lines stepped to align with existing contours. Retained and new trees and landscaping are placed to appear natural from a distance, integrating the development with the surrounding topography. 6. Existing trees with a circumference of 37.5 inches, measured 4.5 feet above the ground Page 4 level, should be preserved and integrated into the site design. Existing vegetation should be retained as much as possible. The project preserves existing trees wherever feasible, including all trees with a circumference of 37.5 inches or greater that are not proposed for removal to allow for construction on the most suitable development area of the site. The arborist report surveyed 63 trees within the project vicinity. A total of 15 trees are proposed for removal, including 14 protected Coast Live Oaks and Blue Oaks. To offset these removals, 30 replacement Coast Live Oak and Blue Oak trees will be planted on site, and the remaining 30 replacement trees will be satisfied through payment of in-lieu fees in accordance with the City’s Tree Technical Manual. All remaining trees within the project area will be protected during construction with tree protection fencing in accordance with City standards, maintaining the natural character of the property. 7. Cut is encouraged when it is necessary for geotechnical stability and to enable the development to blend into the natural topography. Fill is generally discouraged and should never be distributed within the driplines of existing trees. Locate development to minimize the need for grading. The project minimizes grading by following the site’s natural slope and avoiding unnecessary cut or fill. Limited grading is proposed only where needed for geotechnical stability, and no fill will be placed within the driplines of existing trees, allowing the development to blend with the natural topography. 8. To reduce the need for cut and fill and to reduce potential runoff, large, flat expanses of impervious surfaces should be avoided. The project minimizes impervious surfaces by limiting hardscape to essential areas and retaining natural site contours. The design avoids large, flat expanses, reducing grading and potential stormwater runoff while preserving the site’s natural drainage patterns. 9. Buildings should use natural materials and earth tone or subdued colors. The residence uses natural materials, including wood siding and decking, and incorporates earth-toned, subdued colors. These design choices ensure the building blends with the surrounding landscape and minimizes visual impact. 10. Landscaping should be native species that require little or no irrigation. Immediately adjacent to structures, fire retardant plants should be used as a fire prevention technique. Landscaping immediately adjacent to the residence will consist of fire-resistant species consistent with wildfire protection requirements. 11. Exterior lighting should be low-intensity and shielded from view so it is not directly visible from off-site. All exterior lighting will be low-intensity, directed downward, and shielded to prevent visibility from off-site. This approach minimizes light spill and preserves the natural character of the surrounding open space area. Page 5 12. Access roads should be of a rural rather than urban character. (Standard curb, gutter, and concrete sidewalk are usually inconsistent with the foothills environment). The new access driveway is designed to follow the natural topography and minimize grading. Permeable concrete is used to maintain a rural character, reduce runoff, and blend the driveway with the surrounding foothills environment. 13. For development in unincorporated areas, ground coverage should be in general conformance with Palo Alto's Open Space District regulations. The project is within Palo Alto City limits, not in an unincorporated area. SECTION 5. Conditions of Approval. PLANNING DIVISION 1. CONFORMANCE WITH PLANS. Construction and development shall conform to the approved plans entitled, "929 Laurel Glen Drive, Palo Alto, CA 94304” uploaded to the Palo Alto Online Permitting Services Citizen Portal on May 21, 2026, as modified by these conditions of approval. 2. BUILDING PERMIT. Apply for a building permit and meet any and all conditions of the Planning, Fire, Public Works, and Building Departments. 3. BUILDING PERMIT PLAN SET. A copy of this Record of Land Use Action and conditions of approval shall be printed on the second page of the plans submitted for building permit. 4. PROJECT MODIFICATIONS. All modifications to the approved project shall be submitted for review and approval prior to construction. If during the Building Permit review and construction phase, the project is modified by the applicant, it is the responsibility of the applicant to contact the Planning Division/project planner directly to obtain approval of the project modification. It is the applicant’s responsibility to highlight any proposed changes to the project and to bring it to the project planner’s attention. 5. UTILITY LOCATIONS. In no case shall utilities be placed in a location that requires equipment and/or bollards to encroach into a required parking space. In no case shall a pipeline be placed within 10 feet of a proposed tree and/or tree designated to remain. 6. NOISE PRODUCING EQUIPMENT. All noise producing equipment shall be located in accordance with PAMC Section 9.10.030. No person shall produce, suffer or allow to be produced by any machine, animal or device, or any combination of same, on residential property, a noise level more than six dB above the local ambient at any point outside of the property plane. 7. LIGHT AND GLARE. Exterior lighting shall be low-intensity and shielded from view, so it is not directly visible from off-site. The light emitted from skylights shall be minimal during the Page 6 night hours. Utilizing treatments such as translucent glass, shading systems, and interior light placement can reduce the night glare. Skylights shall not use white glass. a. To reduce interference with wildlife, outdoor lighting shall be limited to Correlated Color Temperature of 2700 Kelvin or less. b. No outdoor lighting shall be on after 11pm, except to the minimum required for safety. 8. PROJECT ARBORIST. The property owner shall hire a certified arborist to ensure the project conforms to all Planning and Urban Forestry conditions related to landscaping/trees. 9. LANDSCAPE PLAN. Plantings shall be installed in accordance with the approved plan set and shall be permanently maintained and replaced as necessary. 10. ARBORIST FOLLOW UP. A follow-up arborist and/or landscape report shall be required five years after the final sign-off of the project completion. This report shall evaluate the health of trees and significant landscape that were required for screen planting or and/or were designated as protected plantings on the approved plans for the project. Any subsequent owner(s) shall also be obligated to replace any trees that die with trees of the same size and species stated on the approved planning and building permit plans. 11. TREE PROTECTION FENCING. Tree protection fencing shall be required for all trees and shrubs proposed to be maintained as identified in the Arborist Report. 12. FENCES. Fences and walls shall comply with the applicable provisions of Chapter 16.24, Fences, of the Palo Alto Municipal Code (PAMC). Heights of all new and existing fencing must be shown on the Building Permit plans. a. Where the existing fence is located off the subject property and/or where the existing fence is failing, a new Code compliant fence shall be constructed. 13. ESTIMATED IMPACT FEE. Development Impact Fees, currently estimated in the amount of $148,650.51, shall be paid prior to the issuance of the related building permit or may be deferred in accordance with PAMC Section 16.64.030 with a lien on the property. 14. IMPACT FEE 90-DAY PROTEST PERIOD. California Government Code Section 66020 provides that a project applicant who desires to protest the fees, dedications, reservations, or other exactions imposed on a development project must initiate the protest at the time the development project is approved or conditionally approved or within ninety (90) days after the date that fees, dedications, reservations or exactions are imposed on the Project. Additionally, procedural requirements for protesting these development fees, dedications, reservations and exactions are set forth in Government Code Section 66020. IF YOU FAIL TO INITIATE A PROTEST WITHIN THE 90-DAY PERIOD OR FOLLOW THE PROTEST PROCEDURES DESCRIBED IN GOVERNMENT CODE SECTION 66020, YOU WILL BE BARRED FROM CHALLENGING THE VALIDITY OR REASONABLENESS OF THE FEES, DEDICATIONS, RESERVATIONS, AND EXACTIONS. If these requirements constitute fees, taxes, Page 7 assessments, dedications, reservations, or other exactions as specified in Government Code Sections 66020(a) or 66021, this is to provide notification that, as of the date of this notice, the 90-day period has begun in which you may protest these requirements. This matter is subject to the California Code of Civil Procedures (CCP) Section 1094.5; the time by which judicial review must be sought is governed by CCP Section 1094.6. 15. PLANNING FINAL INSPECTION. A Planning Division Final inspection will be required to determine substantial compliance with the approved plans prior to the scheduling of a Building Division final. Any revisions during the building process must be approved by Planning, including but not limited to; materials, fenestration and hard surface locations. Contact your Project Planner at the number below to schedule this inspection. 16. PERMIT EXPIRATION. The project approval shall be valid for a period of two years from the original date of approval. Application for a one-year extension of this entitlement may be made prior to expiration, by emailing Planning Support Staff at Planner@PaloAlto.gov. If a timely extension is not received, or the project has already received an extension and the applicant still wishes to pursue this project, they must first file for a new Planning application and pay the associated fees. This new application will be reviewed for conformance with the regulations in place at that time. 17. INDEMNITY. To the extent permitted by law, the Applicant shall indemnify and hold harmless the City, its City Council, its officers, employees and agents (the “indemnified parties”) from and against any claim, action, or proceeding brought by a third party against the indemnified parties and the applicant to attack, set aside or void, any permit or approval authorized hereby for the Project, including (without limitation) reimbursing the City for its actual attorneys’ fees and costs incurred in defense of the litigation. The City may, in its sole discretion, elect to defend any such action with attorneys of its own choice. URBAN FORESTRY 18. For 30 unplanted 24" box replacement trees, an Urban Forestry in-lieu fee of $37,500 (at $1250/unplanted tree) will be invoiced at the building permit phase prior to permit issuance. 19. The applicant's proposed location of the SFR located nearest to Laurel Glen Drive and situated in a pre-existing clearing on the property constitutes the least environmentally impactful location for the structure with respect to tree removals. 20. The applicant must provide an updated Arborist report which references PAMC 8.10.092 and subsequently the applicable City and State regulations regarding defensible space in the wildland urban interface area to justify that proposed tree removals are in conformance with City of Palo Alto and State Fire Regulations and as reflected in zone 0 and zone 1 of the Fire Department Site Plan sheet A1.3 of the C3 submittal of permit 25PLN-00005. Page 8 21. The proposed fifteen coast live oak tree removals in zone 0 and zone 1 will be adequately replaced by planting 30 new 24" box trees and providing an in-lieu fee of 30 24" box trees at $1250 per tree to satisfy the no-net-loss of canopy requirement. Page 9 compliance action pursuant to PAMC 8.10.080. The required protective fencing shall remain in place until the final landscaping or Urban Forestry inspection of the project is completed. 28. NO NET LOSS OF CANOPY. In order to comply with the City’s no net loss of canopy policy (PAMC 8.10.055; Urban Forest Master Plan Goals 6.A, 6.B, & 6.C; Comprehensive Plan, Natural Environment Chapter Goal N-2) all trees 4 inches DBH and larger are subject to replacement to avoid a loss of canopy at the neighborhood level. Replacement ratios are determined by table 3-1 in the Tree and Landscape Technical Manual, Section 3.02. New landscape tree plantings (24 inch box or larger) count towards the replacement total. Screening trees may also count toward the total depending on size and species selected. If unable to plant the required number of trees on site (our preferred solution) there is the option of paying in-lieu fees per each 24 inch box tree into the forestry fund. [Note: A replacement at ratio of 1:1 for trees listed as exempt species under PAMC 8.10.020 is recommended. Exempt trees may require full replacement on parcels zoned other than R1, RE, R-2, or RMD]. 29. PLAN CHANGES. Revisions and/or changes to plans before or during construction shall be reviewed and responded to by the (a) project site arborist, or (b) landscape architect with written letter of acceptance before submitting the revision to Planning and Development Services Department for review by Planning, Public Works, or Urban Forestry. 30. PLAN SET REQUIREMENTS. The final Plans submitted for a building permit shall include the location, DBH, canopy drip-line, and TPZ of all trees 4 inches DBH or greater as well as the following information and notes on relevant plan sheets: a. T-1 SHEET SET, The building permit plan set will include the City’s full-sized, T-1 Sheet Set (Tree Protection-it's Part of the Plan!), available on the Development Center website. A certified arborist shall complete and sign the Tree Disclosure Statement. b. TREE PRESERVATION REPORT (TPR), if indicated by Tree Disclosure Statement, All sheets of the Applicant’s TPR approved by the City for full implementation by Contractor, shall be printed on numbered T-1 Sheets (T-3, T-4, etc.) and added to the sheet index. c. TREE PROTECTION FENCING, The Plan Set (esp. site, demolition, grading & drainage, foundation, irrigation, tree disposition, utility sheets, etc.) must delineate/show the correct configuration of Type I, Type II or Type III fencing around each Protected Tree, using a bold dashed line enclosing the Tree Protection Zone (CPA Standard Detail #605). UTL WGW ENGINEERING The following comments are required to be addressed prior to any future related permit application such as a Building Permit, Excavation and Grading Permit, Certificate of Compliance, Street Work Permit, Encroachment Permit, etc. These comments are provided as a courtesy and are not required to be addressed prior to the Planning entitlement approval: 31. At building permit the applicant shall submit a completed water-gas-wastewater service connection application - load sheet for the City of Palo Alto Utilities. The applicant must provide all the information requested for utility service demands (water in fixture Page 10 units/g.p.m., gas in b.t.u.h, and sewer in fixture units/g.p.d.). The applicant shall provide the existing (prior) loads, the new loads, and the combined/total loads (the new loads plus any existing loads to remain). 32. At building permit the applicant shall submit improvement plans for utility construction. The plans must show the size and location of all underground utilities within the development and the public right of way including meters, backflow preventers, fire service requirements, sewer mains, sewer cleanouts, sewer lift stations, and any other required utilities. 33. At building permit, the applicant must show on the site plan the existence of any auxiliary water supply, (i.e. water well, gray water, recycled water, rain catchment, water storage tank, etc). 34. The applicant shall be responsible for installing and upgrading the existing utility mains and/or services, laterals as necessary to handle anticipated peak loads. This responsibility includes all costs associated with the design and construction for the installation/upgrade of the utility mains and/or services/laterals. 35. An approved reduced pressure principle assembly (RPPA backflow preventer device) is required for all existing and new water connections from Palo Alto Utilities to comply with requirements of California administrative code, title 17, sections 7583 through 7605 inclusive. The RPPA shall be installed on the owner's property and directly behind the water meter within 5 feet of the property line. RPPA’s for domestic service shall be lead free. Show the location of the RPPA on the plans. 36. An approved reduced pressure detector assembly (RPDA backflow preventer device, STD. WD-12A or STD. WD-12B) is required for all new fire service connections from Palo Alto Utilities to comply with requirements of California administrative code, title 17, sections 7583 through 7605 inclusive. The RPDA shall be installed on the owner's property and directly behind the City fire service, within 5’ (feet) of the property line or City Right of Way. 37. All backflow preventer devices shall be approved by the WGW engineering division. Inspection by the city inspector is required for the supply pipe between the meter and the assembly. 38. The applicant shall pay the capacity fees and connection fees associated with new utility service/s or added demand on existing services. The approved relocation of services, meters, hydrants, or other facilities will be performed at the cost of the person/entity requesting the relocation. 39. If a new water service line installation for fire system usage is required, show the location of the new water service on the plans. The applicant shall provide to the engineering Page 11 department a copy of the plans for fire system including all fire department's requirements. 40. Each unit or building shall have its own water meter and gas meter shown on the plans. Each parcel shall have its own water and gas service and sewer lateral connection shown on the plans. 41. All existing water, and gas. and wastewater services/laterals that will not be reused shall be abandoned at the main per the latest WGW utilities standards. 42. Utility vaults, transformers, utility cabinets, concrete bases, or other structures cannot be placed over existing water, gas, or wastewater mains/services. Maintain 2’ horizontal clear separation from the vault/cabinet/concrete base to existing utilities as found in the field. If there is a conflict with existing utilities, Cabinets/vaults/bases shall be relocated from the plan location as needed to meet field conditions. 43. Trees may not be planted within 10 feet of existing water, gas, and wastewater mains/laterals/water services/or meters unless otherwise approved by Waste-Gas-Water and Urban Forestry. New water or wastewater services/laterals/meters may not be installed within 10’ of existing trees unless otherwise approved by Waste-Gas-Water. Maintain 10’ between new trees and new water and wastewater services/laterals/meters unless otherwise approved by Waste-Gas-Water. UTL ELECTRICAL ENGINEERING 44. On Sheet A1.2 the following items have to be addressed: a. Electric trench is subject to change per CPAU requirements. b. Required number of conduits for trench to be determined by CPAU during estimate which begins after BLD approval and non-refundable advanced fee. c. Electric line will need to maintain required CPAU clearances and go around storm drainhttps://www.paloalto.gov/files/assets/public/v/1/utilities/utilities- engineering/electrical/2.-electrical-requirements/1003-dt-ss-u-1003-rev-10.pdf d. Electric line will need to maintain required CPAU clearances and go around storm drainhttps://www.paloalto.gov/files/assets/public/v/1/utilities/utilities- engineering/electrical/2.-electrical-requirements/1003-dt-ss-u-1003-rev-10.pdf e. Meter elevation drawing will need to be provided showing exact clearances on BLD submittal. f. Review City of Palo Alto standard drawing SR-MT-E-1012. If the meter location is not compliant with current standards, it will not be energized. BUILDING DIVISION 45. Submit a soil report at time of the building permit submittal. 46. All design plans and calculation shall meet the 2025 CA Building Standards Code as amended by the CITY. Include compliance to the 2025 CA Wildland-Urban Interface Code. Page 12 47. Refer to the latest building permit Submittal checklist for additional requirements. PUBLIC WORKS ENGINEERING DIVISION 48. PUBLIC WORKS STANDARD CONDITIONS SHEET. The Department of Public Work’s full-sized "Standard Conditions" sheet shall be included in the improvement plans and the applicant shall comply with all conditions listed in the sheet. The sheet can be obtained from a staff member of Public Works Engineering Services or at the following link under “Public Works Plan Review Documents”: https://www.paloalto.gov/Departments/Public- Works/Engineering-Services/Forms-and-Permits 49. SIDEWALK, DRIVEWAY, CURB & GUTTER. The applicant shall meet with a Public Works inspector by calling 650-496-6929 to determine portions of sidewalk, curb, gutter, and driveway approaches that shall be replaced along the project frontage. These portions shall be indicated on the site improvement plans. In addition, a Site Inspection Directive sheet shall be completed, signed by the inspector, and scanned onto the plan set. The sheet can be obtained from a staff member of Public Works Engineering Services or at the following link: https://www.paloalto.gov/files/assets/public/public-works/engineering- services/webpages/forms-and-permits/other-guidelines/pwe-site-inspectiondirective_rev- 2021.pdf 50. DRIVEWAY APPROACHES. The applicant shall comply with all regulations in PAMC Chapter 12.08 for driveway approaches. 51. STORM WATER POLLUTION PREVENTION SHEET. The City's full-sized "Pollution Prevention - It's Part of the Plan" sheet shall be included in the improvement plans. The sheet can be obtained from a staff member of Public Works Engineering Services or at the following link under “Public Works Plan Review Documents”: Forms and Permits – City of Palo Alto, CA 52. IMPERVIOUS SURFACE AREA WORKSHEET. The applicant shall fill out the Impervious Area Worksheet for Land Developments at the link below. The sheet shall be both emailed to pwecips@cityofpaloalto.org and included with the building permit submittal: impervious- area-worksheet-fillable.pdf 53. GRADING & DRAINAGE PLAN. The improvement plans shall be compliant with the “Grading & Drainage Guidelines for Residential Developments”. The sheet can be obtained from a staff member of Public Works Engineering Services or at the following link under “Public Works Plan Review Documents”: Forms and Permits – City of Palo Alto, CA 54. C.3 STORMWATER REGULATIONS. This project creates or replaces over 2,500 square feet of impervious surface area. The applicant shall implement one or more of the following site design measures on improvement plans: Direct roof runoff into cisterns or rain barrels for reuse. Direct roof runoff onto vegetated areas. Page 13 Direct runoff from sidewalks, walkways, and/or patios onto vegetated areas. Direct runoff from driveways and/or uncovered parking lots onto vegetated areas. Construct sidewalks, walkways, and/or patios with permeable surfaces. Construct driveways, and/or uncovered parking lots with permeable surfaces. 55. STREETWORK PERMIT. All improvement plans shall include the following note adjacent to proposed work in the public right-of-way. “Any construction within the public right-of-way requires an approved Streetwork Permit from Public Works Engineering”. 56. DEMOLITION PLAN. The following note shall be placed adjacent to all affected trees on the Demolition Plan: “Excavation and trenching is restricted within the Tree Protection Zone (refer to T-1 Tree Protection Sheet) or as approved by the Urban Forestry Division at 650- 496-5953. Any changes shall be approved by the same”. 57. CONSTRUCTION STAGING. All improvement plans shall include the following note on the Site Plan and the Grading & Drainage Plan. “All construction materials and equipment shall be staged, stored, and stockpiled onsite and not on any public street”. 58. EXCAVATION & GRADING PERMIT. An Excavation and Grading Permit shall be obtained per PAMC Chapter 16.28 prior to building permit approval. The permit application and all required documents shall be submitted to Public Works Engineering. The application can be obtained from a member of Public Works Engineering Services or at the following link: https://www.paloalto.gov/Departments/Public-Works/Engineering-Services/Forms-and- Permits 59. CIVIL ENGINEER CERTIFICATION. Upon completion of the rough grading work and at the final completion of the work, applicant shall provide an as graded grading plan prepared by the civil engineer that includes original ground surface elevations, as-graded ground surface elevations, lot drainage patterns and locations and elevations of all surface and subsurface drainage facilities. The civil engineer shall certify that the work was done in accordance with the final approved grading plan (per PAMC 16.28.250). 60. SOILS ENGINEER CERTIFICATION. Upon completion of the rough grading work and at the final completion of the work, applicant shall provide a soil grading report prepared by the soils engineer, including locations and elevation of field density tests, summaries of field and laboratory tests and other substantiating data, and comments on any changes made during grading and their effect on the recommendations made in the soils engineering investigation report. The soils engineer shall certify as to the adequacy of the site for the intended use (PAMC 16.28.250). SECTION 6. Term of Approval. Site and Design Approval. The project approval shall be valid for a period of two years from the original date of approval. In the event a building permit(s), if applicable, is not secured for the project within the time limit specified above, the approval shall expire and be Page 14 of no further force or effect. Application for extension of this entitlement may be made prior to the two year expiration. PASSED: AYES: NOES: ABSENT: ABSTENTIONS: ATTEST: City Clerk Mayor APPROVED AS TO FORM: APPROVED: __________________________ ____________________________ Senior Assistant City Attorney Director of Planning and Development Services 1 7 6 ATTACHMENT C 929 Laurel Glen Drive 25PLN-00005 Table 1a: COMPARISON WITH CHAPTER 18.28 (OS DISTRICT) OS Residential Development Standards Regulation Required Existing Proposed Minimum Site Area, Width and Depth Area: 10 acres Width: No standard Depth: No standard Area: 4.23 acres (184,201 square feet) Width: varies, 500-564 feet Depth: varies, 278-372 feet No change Front Yard 30 feet N/A 74.28 feet Street Side Yard 30 feet N/A N/A Rear Yard 30 feet, and 20 feet from creek top of bank N/A 266.82 feet Interior Side Yard 30 feet N/A Right: approx. 73.59 feet Left: approx. 338.3 feet Max. Building Height 25 feet N/A 24.85 feet Maximum Impervious Coverage 4.385 % (8,077 square feet) N/A 4.234 % (7,799.05 square feet: 3,462.92 sf building, 4,336.13 sf hardscape) Max. Total Floor Area Ratio 4.385 % (8,077 square feet) N/A 3.58% (6,580.82 square feet) Maximum Number of Stories 2 N/A 2 Table 1b: CONFORMANCE WITH CHAPTER 18.52 (Off-Street Parking and Loading) Single Family Residential Uses (Tandem Parking Allowed) Type Required Existing Proposed Vehicle Parking 4 spaces, of which at least one must be covered N/A 3 covered spaces, 1 uncovered space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etter of Application Date: 01.30.2026 Dear Planning Staꢀ, This letter is submitted in support of our proposed residential project located within the OS Palo Alto Comprehensive Plan and Open Space Development Criteria adopted on October 20, 1986. 1. Consistency with the Palo Alto Comprehensive Plan The proposed development is consistent with the following goals and policies from the Land Use Policy L-6.4 (Protection of Open Space Areas): The project is sited and designed to preserve the open hillside setting. In conjunction with Natural Environment Policy N-1.2 (Environmental Stewardship): Native, ﬁre resistant and drought-tolerant landscaping is incorporated to enhance Design & Built Environment Goal L-6 (Context-Sensitive Design): The home maintains a low proﬁle from the public right-of-way, uses earth-toned materials, 908 Industrial Ave, Palo Alto CA 94303 | (833) 262-2208 | dan@spacial.io | www.spacial.io Page | 1 Mobility Goal T-5 (Minimizing Impacts): The driveway utilizes permeable concrete to reduce runoꢀ, and parking is accommodated 2. Compliance with the 10 Open Space Development Criteria 1. Preservation of Natural Character: The design minimizes grading by following the natural slope. The lower level is terraced to 2. Views and Vistas: The structure is sited downslope from the street, protecting public view corridors. Upper 3. Environmental Quality: Permeable surfaces, drought-resistant planting, and rooftop solar panels are included. 4. Use Compatibility: The proposed single-family residential use is consistent with the passive, low-density intent 908 Industrial Ave, Palo Alto CA 94303 | (833) 262-2208 | dan@spacial.io | www.spacial.io Page | 2 5. Access and Circulation: Site access is via a single, existing driveway. Circulation is limited and unobtrusive. The beneﬁt. 6. Facility Design: The architecture is modern and modest in scale, with low pitched roofs and earth-tone 7. Vegetation and Landscaping: Landscaping uses ﬁre resistant, native species to preserve habitat value and minimize 8. Public Beneﬁt: While this is a private residence, the design preserves the open character of the land, 9. Maintenance and Management: As a private residence, all maintenance is the responsibility of the homeowner. Long-term 10. Mitigation: All development impacts have been minimized through sensitive design and site planning. A ꢀects. 908 Industrial Ave, Palo Alto CA 94303 | (833) 262-2208 | dan@spacial.io | www.spacial.io Page | 3 Conclusion We believe this project aligns with the vision of the Palo Alto Comprehensive Plan and fulﬁlls all requirements under the OS Development Criteria. The proposed design is a sensitive, sustainable addition to Palo Alto’s open space community fabric and reﬂects a strong commitment to environmental stewardship and contextual design. Thank you for your consideration. Sincerely, Daniel Hruby, Architect 908 Industrial Ave, Palo Alto CA 94303 | (833) 262-2208 | dan@spacial.io | www.spacial.io Page | 4 Moki Smith Arborist mokismitharborist@gmail.com 11/20/2024 LicensedArborist - W. M. Smith Arborist Report Site Address - Laurel Canyon Drive, Palo Alto 94304 Licensed arborist William Smith visited the property located at Laurel fected by development on the subject property. The trees included in this tree inventory are coast live oak (Quercus ), blue oak (Quercus douglasii), Bay laurel (Laurus nobilis) and Valley oak (Quercus lobata). Within this report you will find key data pertaining to each individual tree, their conditions, and locations. Respectfully Submitted, Table of Contents Introduction ————————————————————————Page 1 Report Contents: 1. Tree Survey Data: ◦Tag numbers, species, trunk diameters (DBH), approximate tree heights, approximate canopy spreads, and overall conditions. ◦ 2. Protected TreeAnalysis: ◦Analysis to determine the number of trees that are considered protected. 3. Tree Protection Plan: ◦Outline of preservation measures for trees that will remain on-site during development. ◦Assessment of development impacts on the trees that are protected under Project Location: The project site consists of the parcel of land located north of Laurel Glen Drive. This Quercus agrifolia), Valley Oak (Quercus lobata), and Blue Oak Quercus douglasii). Survey Methods: The tree survey and inventory were conducted by ISAcertified arborist W. M. Smith The following data was collected for each tree: •Trunk Diameter: Measured at 54 inches above grade (DBH). Tree Species: Identified based on observed characteristics. Tree Height: Approximate measurements taken visually. Canopy Spread: Approximate measurements taken visually. General Condition: Based on a visual assessment - no coring, lab testing, or Tree Condition and Structure: Avisual assessment of health and structure were used to assign a general condition rating Refer to the following scale for general condition: Good: 75%-100% healthy foliage, free of major defects, good form and function for the location. Fair: 35-75% healthy foliage, moderate defects that may compromise the function or form of the tree overtime if left un-treated. Poor: Less than 35% of healthy foliage and significant defects resulting in a low life expectancy. This assessment includes 63 trees, with the majority rated in Fair condition due to both Poor condition, showing significant decline Good condition rating, defects. These trees represent the best preservation candidates, as they are expected to Tree Structure: Good: Minor structural flaws that may be corrected through pruning. Tree has an upright Fair: Some structural flaws not correctable through pruning. Tree may have more than Poor: Significant structural flaws not correctable through pruning. Significant dead wood Inventory Results: Moki SmithArborist surveyed a total of 63 trees across the parcels that are included in Quercus douglasii), eighteen coast live oaks (Quercus agrifolia), and four valley oaks (Quercus lobata). Protected trees are noted in the Suitability for Preservation: In assessing the trees’suitability for preservation, several factors were considered: 1. Health: Healthy trees are better equipped to tolerate development impacts, such as soil compaction and changes in moisture. 2. Structural Integrity: Trees with significant decay or structural defects increase 3. Species Response: Certain species, such as those accustomed to the native 4. Age and Longevity: Older trees may be less adaptable to development impacts The suitability for preserving the 63 trees located on this development site in PaloAlto Additionally, several of the oaks exhibit moderate decay on their main stems, a result of To ensure the longevity and structural integrity of the oak trees slated for preservation, maintaining its ecological and aesthetic value. Proper pruning should adhere toANSI Some of the oak trees on the site exhibit signs of fungal diseases affecting their foliage The majority of the trees located on the subject property are native Coast live oaks Quercus agrifolia), Blue oaks (Quercus Douglasii), and Valley oaks (Quercus lobata) Protected Trees: PaloAlto Tree Ordinance 8.10.010 Purpose. The purpose of this chapter is to protect specified trees located on private property within the city, and establish standards for removal, maintenance, and planting of trees and landscaping. In establishing these procedures and standards, the city recognizes that trees and landscaping are an essential part of the city's infrastructure. Their benefits include promoting the health, safety, welfare, and quality of life of the residents of the city; addressing climate change by sequestering carbon and providing a cooling effect; reducing air, water, and noise pollution; preventing soil erosion and stormwater runoff; providing wildlife habitat; and enhancing the aesthetic environment. It is the city's intent to encourage both the preservation of trees and the proactive incorporation of trees and their benefits within development. “Protected” tree includes the three species that were already protected as well as additional native tree species and Species Updat Previ Ordin Ordin Coast live oak 11.5 inches 11.5 inches Valley oak Coast redwood 11.5 inches California black oak Others except invasive species 8.10.050 Removal of protected trees. It shall be a violation of this chapter for anyone to remove or cause to be removed a protected tree, except pursuant to a protected tree removal permit issued under Section 8.10.140 consistent with the following: (a) In the absence of proposed development: (1) Aprotected tree shall not be removed unless the urban forester grants a protected tree removal permit, or on parcels zoned other than single-family (R-1) or low density residential (RE, R-2, or RMD), the director of planning and development services authorizes the removal through staff level architectural review pursuant to Section 18.76.020(b)(3), having determined, on the basis of a tree report prepared by a designated arborist and other relevant information, that treatments or corrective practices are not feasible, and that the tree should be removed because any of the following apply: (i) It is dead, is hazardous, or constitutes a public nuisance under Section 8.04.050 of this code. (iii) It is at risk for retrenchment or other tree decline coping processes or does not conform with right tree in the right place principles. (iv) It is impacting the foundation or eaves of a residence, or any covered parking required under Title 18 of this code. (2) In the event a protected tree is removed pursuant to a protected tree removal permit granted under this subsection (a), a temporary moratorium on development of the subject property may be issued by the urban forester for up to twenty-four months or by, the director of planning and development services, in consultation with the urban forester, for up to thirty-six months, from the date the tree removal occurred. Completion of required mitigation measures included in the tree removal permit does not remove or shorten any such moratorium.A moratorium may be terminated early with approval of the urban forester or director of planning, and development services, as applicable, and may require additional mitigation measures. Mitigation measures included in the protected tree removal permit and any additional mitigation measures required to shorten a moratorium shall be imposed as a condition of any subsequent permits for development on the subject property. (b) In the case of any development on a single-family (R-1) or low density (RE, R-2, or RMD) residential zoned parcel, other than in connection with a subdivision, a protected tree shall not be removed unless the tree is proposed for removal to accommodate anADU constructed pursuant to Section 18.09.030, or because removal is necessary to allow anADU constructed pursuant to Section 18.09.040 to achieve the minimum standards set forth in state law, or it is determined by the urban forester, on the basis of a tree report prepared by a designated arborist and other relevant information, that any of the following apply: (1) The tree is so close to the proposed development that construction would result in the death of the tree, and there is no financially feasible design alternative that would permit preservation of the tree, where financially feasible means an alternative that preserves the tree unless retaining the tree would increase project cost by more than twice the reproduction cost of the tree or ten percent of the given project valuation, whichever is greater. (2) Retention of one or more trees would result in reduction of the otherwise-permissible buildable area of the lot by more than twenty-five percent, and there is no financially feasible design alternative that would allow for preservation of the tree(s). For the purposes of this subsection (a)(2), a financially feasible design alternative means a design alternative that preserves the tree(s) and would not increase the project cost by more than twice the reproduction cost of the tree(s) or ten percent of the given project valuation, whichever is greater.All tree protection zones impacting buildable area are included in the reduction of buildable area calculation. (3) The tree could be removed due to the conditions listed in Section 8.10.050(a)(1)(i), (ii), or (iii) and treatments or corrective practices are not feasible. (c) In the case of development involving a proposed subdivision of land into two or more parcels, a protected tree shall not be removed unless determined by the urban forester, on the basis of a tree report prepared by a designated arborist and other relevant information, that either of the following apply: (1) Removal is unavoidable due to restricted access to the property or deemed necessary to repair a geologic hazard (landslide, repairs, etc.), in which case only the protected tree or trees necessary to allow access to the property or repair the geologic hazard may be removed. (2) The tree could be removed due to the conditions listed in subsection (a)(1)(i), (ii), or (iii) and treatments or corrective practices are not feasible. (d) In the case of development requiring planning approval under Title 18, and not included under subsections (b) or (c), a protected tree shall not be removed unless determined by the urban forester, on the basis of a tree report prepared by a designated arborist and other relevant information, that any of the following apply: (1) Retention of one or more trees would result in reduction of the otherwise-permissible buildable area of the lot by more than twenty-five percent, and there is no financially feasible design alternative that would permit preservation of the tree(s), where financially feasible means an alternative that preserves the tree(s) unless retaining the tree(s) would increase project cost by more than twice the reproduction cost of the tree or ten percent of the given project valuation, whichever is greater.All tree protection zones impacting buildable area are included in the reduction of buildable area calculation. (2) The tree should be removed because it is dead, hazardous, or constitutes a public nuisance under Section 8.04.050. In such cases, the tree protection zone of the removed tree, or an equivalent area on the site, shall be preserved for mitigation purposes from development of any structure. (3) Discretionary development review determines that the final project follows right tree in the right place principles and would result in a net tree canopy increase on the property within fifteen years, and replacement of trees, shrubs, and plants either: (i) Is consistent with Urban Forest Master Plan Goal 2: "Re-generated native woodland and riparian landscapes as the key ecological basis of the urban forest with focus on native species and habitat," or (ii) Uses climate adaptive, drought tolerant species. (e) In any circumstance other than those described in subsections (a), (b), (c), or (d), a protected tree shall not be removed unless determined by the urban forester, on the basis of a tree report prepared by a designated arborist and other relevant information, that the tree is dead, is hazardous, or constitutes a public nuisance under Section 8.04.050. 8.10.055 Tree replacement. (a) In the event a protected tree is removed pursuant to Section 8.10.050(a)(1)(i), mitigation for the removed tree, replacement tree ratio, in lieu fees, or a combination thereof shall be determined by the urban forester, based on factors including but not limited to the species, size, location, and specific reason for removal of the protected tree, in accordance with the standards and specifications in the Tree and Landscape Technical Manual. (b) In the event a protected tree is removed pursuant to Section 8.10.050 (a)(1)(ii), (iii), or (iv), (b), (c), (d), or (e), the tree removed shall be replaced in accordance with the standards and specifications in the Tree and Landscape Technical Manual, including but not limited to prioritization of locally native species, satisfaction of right tree in the right place principles, and incorporation of a secondary goal of net tree canopy increase on the property within fifteen years. The urban forester shall approve the number, species, size, and location of replacement trees. Indigenous species: The following trees are considered indigenous: Coast live oak, Valley oak, Coast redwood, Big leaf maple, Blue oak, California Potential Impacts: The proposed development will necessitate the removal of several oak trees located Prepared by: W. M. Smith (ISACertifiedArborist #WE 13625A) Moki Smith Arborist 408-722-8942 Mokismitharborist@gmail.com Tree Inventory Table Tree Common Name Species D.B.H.Hei Cro Condit Protecte 1 Blue Oak Quercus 19 38 30 Fair Yes Blue Oak Quercus Coast Live Oak Querc 19/17/1 agrifol 4 Blue Oak Quercus 15 45 20 Fair Yes Coast Live Oak Querc 13/15 Good agrifol 6 Blue Oak Quercus 24 45 40 Fair Yes Blue Oak Quercus 15/11/1 Coast Live Oak Querc 19 9 Coast Live Oak Querc 50 35 Fair Yes 10 Querc lobata 11 Blue Oak Quercus 21 55 30 Poor Yes Coast Live Oak Querc 29/23 agrifol 13 Coast Live Oak Querc 14/11 30 25 Fair Yes Querc 7 agrifol 15 Coast Live Oak Querc 22 45 35 Fair Yes Querc Fair Querc Good agrifol 18 Coast Live Oak Querc 8/18/17 50 50 Fair Yes agrifol 19 Coast Live Oak Querc 7/20/9 40 45 Fair Yes Querc Querc 14 agrifol 22 Blue Oak Quercus 16 30 30 Fair Yes Quercus Quercus 22 Querc 10/13 lobata 26 Coast Live Oak Querc 14 30 35 Fair Yes Querc 11/15/1 agrifol / 12 28 Blue Oak Quercus 21 45 40 Fair Yes Quercus 30 Blue Oak Quercus 20 11/14 45 30 Fair Yes Quercus Lau 7 33 Blue Oak Quercus 14 35 25 Poor Yes Quercus Quercus Quercus Fair 37 Valley Oak Querc 28 55 50 Fair Yes lobata 38 Blue Oak Quercus 14 35 35 Fair Yes Quercus 40 Blue Oak Quercus 15 40 40 Fair Yes Quercus Quercus Quercus 11/10 Yes Quercus 9 15 20 13 11 6 Quercus Yes Quercus Quercus Quercus Quercus No Quercus 15 Yes 51 Blue Oak Quercus 13 40 35 Fair Yes Coast Live Oak Querc agrifol 53 Blue Oak Quercus 11 25 20 Fair No Quercus Yes Quercus 56 Valley Oak Querc 15/13 40 45 Fair Yes lobata 57 Blue Oak Quercus 14 35 30 Fair Yes Quercus Quercus Quercus Quercus 62 Blue Oak Quercus 11 35 25 Fair No Coast Live Oak Querc Good Yes agrifol Assessment and Observations Tree Tag# 1 This tree has a moderate lean in the southern direction due to competition for light. Mistletoe noted in the Tree Tag# 2 This tree has a significant lean in the southern direction due to competition for light with neighboring oak Tree Tag# 3 This tree has a significant lean in the southern direction due to competition for light with neighboring oak Tree Tag# 4 Minor fungal damage noted on the foliage of this tree. This tree has a moderate south eastern lean due to Tree Tag# 5 This tree has two co-dominant uprights emerging from the first main crotch located approximately 24 Tree Tag# 6 This tree has a slight southern lean due to competition for light with neighboring oak trees. Decay cavity Tree Tag# 7 Fungal damage noted on the foliage of this tree. Moderate die back noted in the upper canopy. This tree Tree Tag# 8 This tree has evidence of a boring winged beetle noted on the southern side of the main stem frass located Tree Tag# 9 This tree has two co-dominant uprights emerging from a first main crotch located approximately 40 Tree Tag# 10 This tree has a significant western lean at approximately 20 feet above grade. Cavity noted on the Tree Tag# 11 This tree has a south eastern lean. Fungal damage noted on the foliage. Moderate/significant die back Tree Tag# 12 This tree has two co-dominant uprights emerging from a subterranean first main crotch. One of the Tree #12 is located on the adjacent property approximately 10 feet from the property boundary Tree Tag# 13 This tree has two co-dominant uprights emerging from a first main crotch located approximately 6 inches Tree Tag# 14 This tree has a significant southern lean. Tree Tag# 15 This tree has a moderate southern lean noted, due to competition for light with neighboring oaks. Tree Tag# 16 This tree has a significant southern lean due to competition for light with neighboring trees Tree Tag# 17 This tree has a slight southern lean on the main stem due to competition for light. Tree Tag# 18 This tree has two large co-dominant uprights emerging from the first main crotch located approximately Tree Tag# 19 This tree has two large co-dominant uprights emerging from the first main crotch located approximately Tree Tag# 20 This tree has a significant northern lean due to competition for light with neighboring oak trees. Tree Tag# 21 Evidence of boring insect, entrance wounds on the southern side of the main stem up to approximately 10 Tree Tag# 22 This tree has a very significant western lean. Tree Tag# 23 This tree has the majority of its canopy comprised on the western side of the tree. Fungal fruiting bodies Tree Tag# 24 This tree has moderate die back noted in the canopy. Minor fungal damage noted in the canopy. Multiple Tree Tag# 25 This tree has two co-dominant uprights emerging from a subterranean first main crotch, included bark Tree Tag# 26 This tree has a minor northern lean due to competition for light with neighboring oak tree. Fungal damage Tree Tag# 27 This tree has multiple co-dominant uprights emerging from a first main crotch located approximately 6 Tree Tag# 28 This tree has moderate die back noted in the upper canopy. Multiple dead lateral limbs noted. Tree Tag# 29 This tree has moderate die back noted in the canopy. Fungal disease noted on the foliage of this tree. Tree Tag# 30 This tree has lost multiple limbs in the canopy due to fungal disease. Moderate die back noted in the Tree Tag# 31 This tree has two co-dominant uprights emerging from the first main crotch located approximately 24 Tree Tag# 32 This tree has multiple decay wounds on the main stem majority of the canopies, comprise the secondary Tree Tag# 33 This tree has a moderate southern lean due to competition for light with neighboring oak trees. Galls Tree Tag# 34 This tree has a slight southern lean. Fungal damage noted on the foliage of this tree. Minor decay cavities Tree Tag# 35 This tree has a slight southern lean due to competition for light with neighboring oaks. Fungal damage Tree Tag# 36 This tree has moderate die back noted in the upper canopy. Canopy has a slight southwestern lean. Tree Tag# 37 This tree has two co-dominant uprights emerging from the first main crotch located approximately 8 feet Tree Tag# 38 This tree has a moderate north-eastern lean. Moderate die back noted in the canopy. Fungal damage noted Tree Tag# 39 The canopy of this tree has a slight southern lean due to competition for light. Fungal damage noted on Tree Tag# 40 Canopy of this tree has a slight western lean. Fungal damage noted on the foliage. Moderate die back Tree Tag# 41 This tree has a moderate south eastern lean. Fungal damage noted on the foliage of this tree. Moderate die Tree Tag# 42 This tree has a moderate northern lean on the main stem. Fungal damage noted on the foliage. Minor die Tree Tag# 43 This tree has two co-dominant uprights emerging from the first main crotch located approximately 40 Tree Tag# 44 This tree extends in the eastern direction at approximately 15 feet above grade due to competition for Tree Tag# 45 This tree has fungal damage noted on the foliage. This tree has lost multiple lateral limbs. Moderate die Tree Tag# 46 This tree has a moderate southern lean. Two co-dominant upright emerged from the first main crotch Tree Tag# 47 This tree has a moderate eastern lean due to competition for light with neighboring oak trees. This tree Tree Tag# 48 This tree has a minor eastern lean. Fungal damage noted on the foliage. Moderate die back in the canopy. Tree Tag# 49 Fungal damage noted on the foliage of this tree. Minor die back noted in the canopy. Tree Tag# 50 This tree has a minor southern lean. Fungal damage noted on the foliage. Moderate die back noted in the Tree Tag# 51 This tree has a minor southern lean due to competition for light. Fungal damage noted on the foliage. Tree Tag# 52 This tree has a moderate southern lean. Minor die back noted in the canopy. Tree Tag# 53 Moderate die back noted in the canopy of the tree. Fungal damage noted on the foliage of this tree. Tree Tag# 54 This tree has a minor south eastern lean. Moderate die back noted in the canopy. Tree Tag# 55 Minor die back noted in the canopy of this tree. Fungal damage noted on the foliage. Tree Tag# 56 This tree has two co-dominant uprights emerging from a first main crotch located approximately 18 Tree Tag# 57 This tree has minor fungal damage noted on the foliage. Minor die back noted in the canopy. Minor decay Tree Tag# 58 This tree has a minor south eastern lean on the main stem. Decay wound noted on the main stem on the Tree Tag# 59 This tree has fungal damage noted on the foliage and minor die back in the canopy. Tree Tag# 60 This tree has a decay cavity noted on the main stem of approximately 6 feet above grade up to Tree Tag# 61 This tree has two co-dominant uprights emerging from the first main crotch located approximately 11 feet Tree Tag# 62 This tree has a minor eastern lean. Fungal damage noted on the foliage of this tree. Minor die back noted Tree Tag# 63 This tree has a minor northern lean. Site Map Tree Protection Measures for construction • Avoid root damage through grading, trenching, compaction, etc., at least within • Construct a temporary fence as far from the tree stem (trunk) as possible, and at • Do not allow vehicles, equipment, pedestrian traffic; building materials or • Trees that will be impacted by construction may benefit from fertilization, ideally • Individual trees likely to suffer significant impacts may require specific, more Protective tree fencing shall specify the following: (1) Size and materials. Six (6) foot high chain link fencing, mounted on two-inch diameter (2) Area type to be fenced. Type I: Enclosure with chain link fencing of either the entire drip- (4) Warning sign. Each tree fence shall have prominently displayed an 8.5 x 11-inch sign stating: (5) Prior to the commencement of construction, install the fence at the drip-line, around any tree (6) Prohibit all construction activities within the TPZ, including but not limited to: excavation, (7) Prohibit disposal or depositing of oil, gasoline, chemicals or other harmful materials within (10)Retain the services of a certified or consulting arborist who shall serve as the project arborist Tree Removal Plan PaloAlto Tree Removal and Replacement Ordinances 8.10.050 Removal of protected trees. It shall be a violation of this chapter for anyone to remove or cause to be removed a protected tree, except pursuant to a protected tree removal permit issued under Section 8.10.140 consistent with the following: (a) In the absence of proposed development: (1) A protected tree shall not be removed unless the urban forester grants a protected tree removal permit, or on parcels zoned other than single-family (R-1) or low density residential (RE, R-2, or RMD), the director of planning and development services authorizes the removal through staff level architectural review pursuant to Section 18.76.020(b)(3), having determined, on the basis of a tree report prepared by a designated arborist and other relevant information, that treatments or corrective practices are not feasible, and that the tree should be removed because any of the following apply: (i) It is dead, is hazardous, or constitutes a public nuisance under Section 8.04.050 of this code. (iii) It is at risk for retrenchment or other tree decline coping processes or does not conform with right tree in the right place principles. (iv) It is impacting the foundation or eaves of a residence, or any covered parking required under Title 18 of this code. (2) In the event a protected tree is removed pursuant to a protected tree removal permit granted under this subsection (a), a temporary moratorium on development of the subject property may be issued by the urban forester for up to twenty-four months or by, the director of planning and development services, in consultation with the urban forester, for up to thirty-six months, from the date the tree removal occurred. Completion of required mitigation measures included in the tree removal permit does not remove or shorten any such moratorium.Amoratorium may be terminated early with approval of the urban forester or director of planning, and development services, as applicable, and may require additional mitigation measures. Mitigation measures included in the protected tree removal permit and any additional mitigation measures required to shorten a moratorium shall be imposed as a condition of any subsequent permits for development on the subject property. (b) In the case of any development on a single-family (R-1) or low density (RE, R-2, or RMD) residential zoned parcel, other than in connection with a subdivision, a protected tree shall not be removed unless the tree is proposed for removal to accommodate an ADU constructed pursuant to Section 18.09.030, or because removal is necessary to allow an ADU constructed pursuant to Section 18.09.040 to achieve the minimum standards set forth in state law, or it is determined by the urban forester, on the basis of a tree report prepared by a designated arborist and other relevant information, that any of the following apply: (1) The tree is so close to the proposed development that construction would result in the death of the tree, and there is no financially feasible design alternative that would permit preservation of the tree, where financially feasible means an alternative that preserves the tree unless retaining the tree would increase project cost by more than twice the reproduction cost of the tree or ten percent of the given project valuation, whichever is greater. (2) Retention of one or more trees would result in reduction of the otherwise-permissible buildable area of the lot by more than twenty-five percent, and there is no financially feasible design alternative that would allow for preservation of the tree(s). For the purposes of this subsection (a)(2), a financially feasible (3) The tree could be removed due to the conditions listed in Section 8.10.050(a)(1)(i), (ii), or (iii) and treatments or corrective practices are not feasible. (c) In the case of development involving a proposed subdivision of land into two or more parcels, a protected tree shall not be removed unless determined by the urban forester, on the basis of a tree report prepared by a designated arborist and other relevant information, that either of the following apply: (1) Removal is unavoidable due to restricted access to the property or deemed necessary to repair a geologic hazard (landslide, repairs, etc.), in which case only the protected tree or trees necessary to allow access to the property or repair the geologic hazard may be removed. (2) The tree could be removed due to the conditions listed in subsection (a)(1)(i), (ii), or (iii) and treatments or corrective practices are not feasible. (d) In the case of development requiring planning approval under Title 18, and not included under subsections (b) or (c), a protected tree shall not be removed unless determined by the urban forester, on the basis of a tree report prepared by a designated arborist and other relevant information, that any of the following apply: (1) Retention of one or more trees would result in reduction of the otherwise-permissible buildable area of the lot by more than twenty-five percent, and there is no financially feasible design alternative that would permit preservation of the tree(s), where financially feasible means an alternative that preserves the tree(s) unless retaining the tree(s) would increase project cost by more than twice the reproduction cost of the tree or ten percent of the given project valuation, whichever is greater.All tree protection zones impacting buildable area are included in the reduction of buildable area calculation. (2) The tree should be removed because it is dead, hazardous, or constitutes a public nuisance under Section 8.04.050. In such cases, the tree protection zone of the removed tree, or an equivalent area on the site, shall be preserved for mitigation purposes from development of any structure. (3) Discretionary development review determines that the final project follows right tree in the right place principles and would result in a net tree canopy increase on the property within fifteen years, and replacement of trees, shrubs, and plants either: (i) Is consistent with Urban Forest Master Plan Goal 2: "Re-generated native woodland and riparian landscapes as the key ecological basis of the urban forest with focus on native species and habitat," or (ii) Uses climate adaptive, drought tolerant species. (e) In any circumstance other than those described in subsections (a), (b), (c), or (d), a protected tree shall not be removed unless determined by the urban forester, on the basis of a tree report prepared by a designated arborist and other relevant information, that the tree is dead, is hazardous, or constitutes a public nuisance under Section 8.04.050. (Ord. 5612 § 2 (part), 2024: Ord. 5557 § 4 (part), 2022: Ord. 5494 § 3, 2020: Ord. 4826 § 4, 2004: Ord. 8.10.055 Tree replacement. (a) In the event a protected tree is removed pursuant to Section 8.10.050(a)(1)(i), mitigation for the removed tree, replacement tree ratio, in lieu fees, or a combination thereof shall be determined by the urban forester, based on factors including but not limited to the species, size, location, and specific reason for removal of the protected tree, in accordance with the standards and specifications in the Tree and Landscape Technical Manual. (b) In the event a protected tree is removed pursuant to Section 8.10.050 (a)(1)(ii), (iii), or (iv), (b), (c), (d), or (e), the tree removed shall be replaced in accordance with the standards and specifications in the Tree and Landscape Technical Manual, including but not limited to prioritization of locally native species, satisfaction of right tree in the right place principles, and incorporation of a secondary goal of net tree canopy increase on the property within fifteen years. The urban forester shall approve the number, species, size, and location of replacement trees. (Ord. 5612 § 2 (part), 2024: Ord. 5557 § 4 (part), 2022) Tree Replacement Plan This plan outlines the measures to compensate for the removal of eight native oak trees, seven of Overview of Tree Removal •Total Trees to Be Removed: 15 native oak trees Tags: 7, 11, 21, 37, 38, 39, 40, 56, 57, 58, 59, 60, 61, 62, 63 These trees are either directly within the proposed building footprint or need to be removed due to •Protected Trees: 14 trees are protected under PaloAlto City Ordinance. Replacement Details 60 native oaks• NOTE: In accordance with the CEQA Categorical Exemption Report dated February 2026, replacement trees shall ﬁed environmentally sensitive areas of the site, which is natural habitat of the ﬂower Scrub. The remaining area of the site is only sufﬁcient to plant 30 replacement trees. As •Species: Replacement trees will be either: Quercus agrifolia)◦ ◦Blue Oak (Quercus douglasii) Quercus lobata) •Container Size: All replacement trees will be planted in 24-inch box containers to Planting Locations: Replacement trees will be distributed across the property in suitable Replacement trees shall not be planted in the environmentally sensitive areas of the site as identiﬁed in the CEQA Categorical Exemption Report dated February 2026. Planting Guidelines •Soil Preparation: Planting holes will be amended with native soil and organic material Irrigation: Temporary irrigation systems or manual watering will be provided for the Mulching: A3-4 inch layer of mulch will be applied around the base of each tree to conserve moisture and regulate soil temperature. Maintenance and Monitoring Plan •Health Inspections: Bi-annual or quarterly health inspections are recommended to be conducted by a certified arborist during the first two years. •MaintenanceActions: ◦Deadwood and damaged branches will be pruned as needed. Fire Defensible Zones The subject property is located within Palo Alto’s Wildland-Urban Interface fire area, where defensible space is PAMC 8.10.092 Tree Removal in Wildland-Urban Interface Area Tree removal and relocation in the wildland-urban interface (WUI) area, as defined in Section 15.04.150, shall be PAMC 15.04.150 Definitions Wildland-urban interface fire area is a geographical area identified by the State of California as a hazard in CCR 1299.03 Defensible Space Defensible space is required to be maintained at all times whenever flammable vegetative conditions exist. One (a) Zone 1 Requirements (1) Remove all dead or dying grass, plants, shrubs, trees, branches, leaves, weeds, and pine needles from the zone, (2) Remove dead tree or shrub branches that overhang roofs, are below or adjacent to windows, or are adjacent to (3) Relocate exposed firewood piles outside of Zone 1 unless they are completely covered in a fire-resistant (4) Remove flammable vegetation and items that could catch fire which are adjacent to or under combustible (b) Zone 2 Requirements (1) In this zone, create horizontal and vertical spacing among shrubs and trees using the “Fuel Separation” (2) In both the Fuel Separation and Continuous Tree Canopy methods, the following standards apply: (a) Dead and dying woody surface fuels and aerial fuels shall be removed. Loose surface litter, normally (b) Cut annual grasses and forbs down to a maximum height of four inches (4 in.). (c) All exposed wood piles must have a minimum of ten feet (10 ft.) of clearance, down to bare mineral soil, in all Fire Defensible Zones - Site Map 1Job#5573 May 8th, 2026 Drainage Calculations 929 Laurel Glen Drive, Palo Alto Conveyable Flow Rate (Manning’s Equation)1.49 푛 2 1푄 = 퐴 × () × 푅3 × 푆 2 1 푓푡2퐴6−ꢀꢂ푐ℎ 푃푉퐶 = (휋 × 3 ꢁ푛.2 ) × = 0.196푓푡2144 ꢁ푛21 푓푡푃 = (2 × 휋 × 3 ꢁ푛) × = 1.57푓푡푊푒푡푡푒푑 푃푒푟ꢀ푚푒푡푒푟 12 ꢁ푛 퐴 0.196 푓푡2푅퐻푦푑푟푎푢푙ꢀ푐 푅 푎푑ꢀ푢푠 === 0.125푓푡푃 1.57 푓푡 1.49 2 1푄6ꢀꢂ 푃푉퐶 @ 2% = 0.196푓푡2 × () × 0.125푓푡3 × 0.0220.012 푓푡3푄6ꢀꢂ 푃푉퐶 @ 2% = 0.860 (max 푓푙표푤 푟푎푡푒 푐표푛푣푒푦푎푏푙푒)푠푒푐 Captured Area Site Runoff (Rational Method) 푄 = 퐶 × 퐴 × 퐼10− 푀ꢀꢂꢀꢂ퐼10−푀ꢀꢂ = 2.42 (10-Year storm event – NOAA Atlas 14 Vol. 6 Ver. 2)ℎ푟ꢁ푛 1 푎푐푟푒 1 푎푐푟푒푄 = 2.42 × [(0.3 × 11,433푓푡2 × ) + (0.9 × 8,628푓푡2 × )]ℎ푟 43560푓푡2 43560푓푡2 푓푡3푄푀푎푥 퐶푎푝푡푢푟푒푑 = 0.622 푠푒푐 Conveyance Sizing 푓푡3 푓푡30.622 < 0.860푠푒푐 푠푒푐 The runoff captured in the system (for a 10-year storm event and 10-min Time of City of Palo Alto Public Works Engineering IMPERVIOUS AREA WORKSHEET Phone: 650/329-2151 FAX: 650/329-2240 Applicants for all projects creating or replacing 500 square feet or more of impervious surface must fill out 929 Laurel Glen Dr, Palo Alto 182 013Property Address________________________________________________________APN_______-___5_4___-_________ 1_8_4__,2_0_1_______ 05-08-2026 Ken NgaiApplicant Name________________________________________________________ Title of Dwg. used to calculate revised impervious area_____5_5_7_3_-_9_2_9___P_G__P_._d_w_g___________ Land Use (Circle one):Residential Commercial Industrial Roadway For residential uses Þ Number of living units (Circle one):1 2 3 or more Project Type (Circle one):New Development Watershed (Circle one):San Francisquito Matadero Barron Adobe SF Bay (see attached watershed map) Purpose of Worksheet The City of Palo Alto is collecting information on impervious surfaces created by land development projects in order to meet the Every developed land parcel in the City of Palo Alto is assessed a monthly Storm Drainage Fee. The fee is based upon the relative “Impervious surface” means that part of a developed parcel that has been modified to reduce the land’s natural ability to absorb and hold IMPERVIOUS AREA SUMMARY 184,201 ____________(a) Lot size (sq. ft.) 0 0Existing impervious surface (sq. ft.)____________(b)Existing percent impervious [line (b)¸ line (a)] (%) _______(c) Area of impervious surface to be constructed (sq. ft.)_____8,628 ___(d) Ratio of newly constructed impervious surface to existing impervious surface [line (d) ¸ line (b)] (%)____________N_/_A___________(e) Approximate area of land disturbance during construction (sq. ft.) 8,628 ____(g) __1_1_,_8_6_5____(f) Revised percent impervious [line (g) ¸ line (a)] (%) __4.68%____(h) (From “Impervious Area Calculation”, see back side.) STAFF ONLY Building Permit #________________ Building Permit Application Date________________Reviewer__________________ 16April02 Impervious Area Worksheet IMPERVIOUS AREA CALCULATION (Select one of the following methods and provide the required information) METHOD 1 METHOD 2 Calculate the area of impervious surface by measuring all Calculate the area of impervious surface by subtracting the Sq. ft.Sq. ft. 3,473 +__________(1)Buildings Total area of parcel +__________(7) (from Assessor’s Book) 2,478 +__________(2) Parking/storage areas Pervious Areas Walkways Landscaping -___________(8)1055+_____(3) 1,508Patios and courtyards +__________(4)Undisturbed areas Other (specify_W__a_l_l,_F_e_n_c_e_,._..________ ) +__114__Other (specify_____________________) -__________(10) Total impervious area (sum #1 thru 5)Total impervious area (sum #7 thru 10) ___________(11) METHOD 3 Calculate the area of impervious surface by adding (or Existing impervious area +_________(12) Buildings +_________(13) Parking/storage areas Walkways +_________(15) Patios and courtyards Other (specify______________________) +_________(17) Buildings -__________(18) Parking/storage areas Walkways -__________(20) Patios and courtyards Other (specify_____________________) -__________(22) Total impervious area (sum #12 thru 22) ___________(23) 16April02 Impervious Area Worksheet Instructions for Impervious Area Worksheet Beginning May 1, 2002, applicants for all projects creating or replacing 500 square feet or more of Impervious Area Worksheet and submit it to the Building Inspection If you have questions about the form or the requested data, please consult with Public Works Engineering staff at the Development Center. Line -by -Line Instructions Property Address:Insert the street name and address for the subject property. Insert the Assessor’s Parcel Number (APN) for the subject property. Applicant Name: Title of Drawing:Insert the name or number of the plan drawing used to calculate the impervious surface Drawing Date:Insert the date of the drawing used to calculate the impervious surface information. Circle the appropriate land use for the subject property. If the property use is residential, Project Type:Circle the appropriate project type. For purposes of this form, “new development” is Watershed:Circle the appropriate storm drain watershed for the subject property. Use the map on the Insert the amount of impervious surface (in square feet )currently on the subject property Impervious Surface: (or on the property prior to any recent demolition). See the “Purpose of Worksheet” section Area of Impervious Insert the total amount of impervious surface (in square feet) to be constructed as part of Surface to be the subject project (both construction of new impervious surface over existing pervious Approximate Area Insert the approximate area (in square feet) to be disturbed by construction operations Final Impervious Insert the amount of impervious surface (in square feet) that will be on the subject property 16April02 Impervious Area Worksheet San Francisco Bay Watershed M i d d l e f i e l d Ro a d Adobe Creek Watershed San Francisquito Creek Watershed A l m a S t r e e t Barron CreekSTANFORD UNIVERSITY Matadero Creek This map is a product of the Storm Drain Watersheds within the City of Palo Alto 6 T h e C i t y o f P a l o A l t o 0'3500' mraschk, 2002-05-22 10:55:43 This document is a graphic representation only of best available sources. Soils and Foundation Investigation for Laurel Glen Drive. Palo Alto, CA 94303 Lot 2 Track 6723 448 Book 48-51 Farshad Safaian 12193 Brookglen Dr. Sarataga, CA 95070 Project Number: 1392 Copies to: Mr Ken Ngai 1 Subject:Soils and Foundation Investigation of Laurel Glen Drive. PaloAlto, CA 94303 Dear Mr. Ken Ngai Address: Laurel Glen Drive. Palo Alto, CA 94303 In response to your request and authorization, we have completed a soil and foundation Based on our findings, it is our professional opinion that the site is suitable for the proposed New We appreciate the opportunity to be of service to you. If you have any questions concerning our Respectfully Submitted, Farshad Safaian, P.E. Copies to Mr. Mr Ken Ngai 2 TABLE OF CONTENTS PAGE Cover page ………………………………………………………………1 Cover letter ……………………………………………………………...2 1.0 Introduction ……………………………………………………………. 4 2.0 Site Location and Description …………………………………………. 4 3.0 Proposed construction …………………………………………………. 5 4.0 Field Investigation ……………………………………………………...6 5.0 Soil Conditions ………………………………………………………... 6 6.0 Laboratory Testing ……………………………………………………. 9 7.0 Geologic Setting & Faults ……………………………………...…….....7 8.0 Potential Geologic Hazards Evaluation ………………………… …….9 9.0 References ………………………………………………….…….. …..17 10.0 Conclusion & Recommendations………………………..……… ……..18 10.1 General ……………………………………..………....…..18 11.0 Construction Observation ………………………………………......26 Investigation Limitation ……………………………………….........27 Appendix I Consist of: 2. Faults Maps 3. Earthquake Hazard Coefficient by Location 6.Borings Log. Earthquake Coefficients 3 1.0 INTRODUCTION In accordance with your authorization our company has completed a soil and foundation This soil report is not to perform Geology Hazard and Fults Rupture and lifelines This soil report was made from a geotechnical engineering point of view and limited The scope of our work included the following: 1. Site reconnaissance by Professional Engineer. The purpose of this investigation was to evaluate the surface and subsurface soils at the site and Our findings indicate that the proposed above building is feasible from a geotechnical standpoint 2.0 SITE LOCATION & DESCRIPTION The site is rectangular in shape and located as APN 18254013 Lot 13 Laurel Drive Palo Alto CA The above description is based on a site reconnaissance by the Soil Engineer. 4 3.0 PROPOSED CONSTRUCTION This soil report is not to perform Geology Hazard and Fults Rupture and lifelines This soil report was made from a geotechnical engineering point of view and limited The proposed project is a new Single-Family House, Latitude = 37.373765°N, Vicinity Map 5 Vicinity Map 4.0 FIELD INVESTIGATION The field investigation was performed on 12/3/2023 (couldn’t soil sampling because of raining On boring B1 during drilling soil sampling excavation encountered bedrock at 2’ ft (this area B2 encountered rocks at 12’ ft and drilled to the depth of B3 encountered rocks at 12’ ft and drilled to the depth of 15’ ft, and in B4 encountered rocks at 10’ ft and drilled to the depth of 3’ ft. Visual classifications were made from the samples in the field. As the excavation proceeded, 5.0 SOIL CONDITIONS AND DATA The soil conditions were derived from our site reconnaissance and the information and samples obtained from drilled borehole below the new building and between building and Laurel Glen Drive. Visual classifications were made from cutting and the samples in the field. Classifications made in the field were verified in the laboratory after further examination and testing. The results are shown on the Logs of Test Boring. 6 Borehole B-1 – 30 ft from the Laurel Glen Drive: - Topsoil 0” to 24”, vegetated, dark greyish brown, sandy silty clay, very moist, firm. - 2’ to 5’, brownish yellow, encountered bedrock at 2’, silt/sandstone, moist, SPT 20/30/46. - 5’ to 8’, yellow, weathered rock, silt/sandstone, SPT 30/50 for 6”. - Stopped drilling at 8 ft. - No water encountered. Borehole B-2 - 60 ft from the Laurel Glen Drive: - Topsoil 0” to 24”, vegetated, dark greyish brown, sandy silty clay, very moist, firm. -2’ to 5’, yellowish brown, sandy silty clay, moist, SPT 5/7/12. -5’ to 10’, yellowish brown, sandy silty clay, moist, SPT 10/12/20. -10’ to 15’, yellowish brown, sandy silty clay, moist, encountered weathered rock at 12 ft SPT 16/20/30. -15’ to 20’, brownish yellow, weathered rock, moist, SPT 30/32/35. - Stopped drilling at 20 ft. - No water encountered. Borehole B-3 - under the main building area: - Topsoil 0” to 24”, vegetated, dark brown, sandy silty clay, very moist, medium stiff, SPT 4/5/7. -2’ to 6’, yellowish brown, sandy silty clay, moist, firm, SPT 5/7/13. -6’ to 10’, brownish yellow, silty clayey, sand, very moist, SPT 9/15/21. -10’ to 15’, yellowish brown, sandy silty clay, moist, encountered weathered rock at 12 ft SPT 34/43/50 for 5”. - Stopped drilling at 15 ft. Borehole B-4 - under the garage area: - Topsoil 0” to 24”, vegetated, dark brown, sandy silty clay, very moist, stiff, SPT 5/7/10. - Stopped drilling at 15 ft. Soil Data – Typical Properties of Compacted Soils from 0’ to 12’ A): Soil Specification on Top: Soil Classification, SC-SM, Silty Clayey Sandy between 0’ to 12’. 1- Maximum dry density ϒd=120 PCF with optimum moisture Woptimum=13%, ϒt=136PCF 2- Cohesion as saturated C’=300 PSF. 3- Effective stress envelope ϕ’=33 degrees. 4- Coefficients of active pressure, Ka=0.30 and passive pressure, Kp=3.40 for flat backfill 7 5- Modulus of Subgrade Reaction Ks=100 PCI 6- Sieve analysis in boring #3 B-3 at 2ft, Gravel G=1%, Sand S=51%, Fine F=48%. 7- Sieve analysis in boring #4 B-4 at 2’ to 6’ft, Gravel G=1%, Sand S=62%, Fine 8- To get started grading first remove the top 12 inches containing fill soil and vegetation 9- Stripping depth of 12 inches and five (5’) feet beyond the building lines. Scarifying 8” 10- The setback of piers from the slope should be minimum 10 ft (in flattened areas). 11- The minimum piers depth in the rock is 12 ft therefore total depth of piers are 24’ ft. 12- Actual required piers are 18” in diameter and should be minimum 23’ ft and minimum 12 feet in the rock. 13- Allowable foundation pressure 2000 PSF, Lateral Bearing below natural grade 150 PCF 100 PSF. 14- Piers skin friction will be 350 PSF. 15- The lateral sliding coefficient of friction is 0.25. 16- Design Lateral Soil Load for at-rest pressure is 100 PCF. 8 Borings Location 6.0 LABORATORY TESTING All samples were visually classified in accordance with the Unified Soil Classification System -The moisture and density per ASTM D-2937 7.0 GEOLOGIC SETTING & FAULTS Geologic Setting: Generally, the site area is located on the North American Plate just northeast of plate boundary, 9 channels. The Quaternary age-old alluvium consists of inter-layered, poorly sorted gravel, sand, silt, Geologic Map of California Kjf Rocks Franciscan Complex, Cretaceous and Jurassic sandstone with smaller amounts of shale, chert, Mzv Rocks Undivided Mesozoic volcanic and Metavolcanic Rocks. Andesite and rhyolite flow rocks, greenstone, volcanic breccia, and other pyroclastic rocks, in part strongly metamorphosed. Includes volcanic rocks of Franciscan Complex: basaltic pillow lava, diabase, greenstone, and minor pyroclastic rocks. -The geologic formation underlying this site and its vicinity has been mapped by USGS geologic Faults: According to published maps, the site is located at east of the active San Andreas Fault with Earthquake Magnitudes and Los Altos Hills, California Maximum Magnitude (Mw) Earthquakes Historical Estimated MagnitudeFault San Andreas 7.9 1989 Loma Prieta 6.9 1865 N. of 1989 Loma Prieta Earthquake 6.5 1836 East of Monterey 6.5 Hayward 7.1 1868 Hayward 6.8 1984 Morgan Hill 6.2 San Gregorio 7.3 1926 Monterey Bay 6.1 10 8.0 POTENTIAL GEOLOGIC HAZARDS Landslides: We observed some evidence of landslides on the site area during our site reconnaissance, of course Fault Rupture: Seismic Shaking: The site is in the seismically active San Francisco Bay Area. Several major earthquakes, which have TABLE 1.1 ASCE7-16 SEISMIC DESIGN PARAMETERS Parameter Site Class SS Values D 2.573 CBC Reference Section 1613.2.2 MCER ground motion (period=0.2s) S1 0.908 MCER ground motion Site Coefficient, Fa 1.2 Table 1613.2.3(1) Site Class Modified MCER Spectral Response 3.088 Site-modified spectral SDS 2.058 Numeric seismic design value SD1 null Numeric seismic design value 5% Damped Design Spectral Response null Peak Ground Acceleration for this site is 1.059 g. 11 Liquefaction: Soils, which are most susceptible to liquefaction, are saturated loose, fine-grained, uniformly 1- Liquefaction Potential: Soils, which are most susceptible to liquefaction, are saturated loose, fine-grained, uniformly graded, Lateral Spreading & Differential Compaction: Although the soils are generally silty sandy clay and siltstone, and because of the presence of Settlement Estimated settlement. The total settlement of an individual foundation will vary, depending upon the plan dimensions total settlement due to structural loads of zero. Differential settlement is anticipated to be on the order of about zero. Earthquake Zone of Requierd Investigation Landslide Zone- This area is in Landslide Zone Landslide Zone- This area is in Landslide Zone 13 Fault Activity Map: San Andereas, Hayward, Calaveras, and Monte Vista Faults Distance to San Andreas Fault = 2.0 mi 14 Distance to Hayward Fault = 16.5 mi Distance to Calaveras Fault = 21.0 mi Quaternary Fault (age undifferentiated) Site is located between San Andreas and 15 San Andreas and Hayward/Calaveras faults are quaternary fault age undifferentiated, and San This area is close to Monte Vista Fault and has landslide. Kjf Rocks Geologic Map of California Kjf Rocks Franciscan Complex, Cretaceous and Jurassic sandstone with smaller amounts of shale, Mzv Rocks Undivided Mesozoic volcanic and Metavolcanic Rocks. Andesite and rhyolite flow rocks, greenstone, volcanic breccia, and other pyroclastic rocks, in part strongly metamorphosed. Includes volcanic rocks of Franciscan Complex: basaltic pillow lava, diabase, greenstone, and minor pyroclastic rocks. 16 Mzv Rocks 9.0 REFERENCES 9.1 Geologic Map of California 9.5 maps.conservation.ca.gov/geologichazards/ 17 10.0 CONCLUSIONS AND RECOMMENDATIONS 10.1 GENERAL 10.1.1 The site is suitable for the proposed New two-story Single-Family House, if provided 10.1.2 After the plans have been developed, we recommend that these plans be reviewed by our 10.1.3 Field observation and testing during the grading and foundation excavation operation 10.2 GRADING Site Clearing & Preparation: 10.2.1 After flattening the slope, the site should be cleared of all obstructions and deleterious (actually the building line or piers shall have 10 ft setback from the top of slope to have enough resistance force). Then we estimate stripping depth of 12 inches and 10.2.2 At the completion of the clearing, flattening, and stripping operations, all fill areas shall be (shall be determined by soil engineer as needed). 10.2.3 Soft areas encountered shall be excavated to firm base prior to commence of fill operation. On-Site & Import Material: 10.2.4 All on-site material having an organic content of less than 1% by volume and free from other 10.2.5 Any import fill which is predominately granular in nature and with plasticity index of 12 or 18 less than 25, % Passing Sieve #200 between 10% and 20% and maximum Rock size three (3) Compaction: 10.2.6 After preparation of the native ground soils, the site may be brought to the desired finish 6” inches for hand operated 8” inches for heavy equipment compactors in twenty-four (24”) inches of the sub-grade and the aggregate base rock should be compacted to a minimum None-Uniform Soil (Cut/fill): 10.2.8 It is highly emphasized that uniform soil conditions are provided underneath all fill Surface and Subsurface Drain: 10.2.9 All surface water should be collected by a drain system (i.e., catch basin and a solid drain 10.2.10 Studying and preparing this report for Surface and Subsurface Drainage is not part of this Observation & Testing: 10.2.11 Quality, density, and geometry of construction stages in the field should be performed by 19 10.3 DEEP FOUNDATIONS This area is located next to San Andreas and Calaveras Faults and has landslides and (This soil report was made from a geotechnical engineering point of view and limited to our recommendations in the above-mentioned soil report. 10.3.1 DEEP FOUNDATION The piers’ setback from the top of slope should be minimum 10 ft. (on the 1. Due to proximity to the San Andreas fault, steep slopes at the project site and setback from the top of slope should be minimum 10 ft. (on the flattened area) 18” inches that extend 12 feet into hard bedrock, the actual length of piers from the existing 23’ feet. For piers located within 10 ft from the top 10-foot daylight line. The actual length of piers shall be determined by geotechnical engineer at the time of 300 psf for dead plus live load with 1/3 increase allowable for transient wind or seismic, 5 feet not be considered to provide any support. Creep pressure is 56 pcf Inverted EFW (ie. 0 psf at the base of the soils, native stiff soil (5’) feet. passive equivalent fluid pressure of 360 pcf, acting on 1.6 times the width of the pier, for the length embedded in bedrock only. 9. Passive pressure in the upper clayey soils shall be ignored and replaced with an active pressure of 56 pcf, due to soil creep. 20 10. -All exterior piers and interior piers (No Exceptions) should be tied together with three (3) piers diameters is maintained between piers, no Factor of safety for design of deep foundation for downward loads for permanent piers 3. Retaining Walls Retaining walls are incorporated into the structural new building and landscaping 1-Landscaping’s walls should be designed to resist lateral pressures equivalent to those exerted by a medium having an equivalent fluid weight active pressure 60 pcf for flat backfill, and active pressure 75 pcf for backfill with gradients up to 2:1 (H:V). In addition to any pressures exerted during compaction of backfill and all pressures due to any surcharge loads and seismic. 2-Retaining walls those are part of building foundation of structural building should be designed as at-rest lateral soil load equal to equivalent fluid weight of 100 PCF (pound per square foot per foot) 3- Garage Retaining Walls walls should be designed to resist lateral pressures equivalent to those 100 pcf for flat backfill. In addition to any pressures exerted If garage is constructed over empty spaces or rooms, uniform surcharge 100 shall be considered. 21 4- Basement Retaining Walls walls should be designed to resist lateral pressures equivalent to those at-rest design lateral soil load equivalent 100 pcf for flat backfill. In addition to any pressures exerted 5-Seismic force on retaining walls Following parameters are our recommendation to calculate seismic -Any retaining walls incorporated into the two-story new building and landscaping should be designed to resist lateral pressures from seismic forces. Mononobe-Okabe relationship proposed by Seed and Whitman (1970). ∆P ~ (⅓) K γH2AEh where ∆PAE is the dynamic component, Kh is the horizontal ground horizontal peak ground acceleration = 1.059g); γ is the total soil density (136 pcf); and H is the 0.6H from the base of the wall. For retaining walls shorter than 6 ft seismic loads does not need to be Retaining Wall Sub-Drains 10.The above criteria are based on fully drained conditions. It is imperative that all walls be fully drained. 11. In order to achieve fully drained conditions, a drainage filter blanket must be placed behind the wall. The blanket should be a minimum of 12 22 similar). A 4-inch perforated drainpipe should be installed in the bottom of 2 inches of 12.Damp-proofing of the basement walls (such as Miradrain 2000 or 6000) should be included in areas where wall dampness and 13.The drainage pipe used below the basement pad and behind the retaining walls should be 4” schedule 40 perforated pipe to collect the . No flexible pipes are acceptable. 23 FARSHAD SAFAIAN Structural & Geotechnical Services 12193 Brookglen Dr. Saratoga, CA 95070 Cell # (408)505-3165 10.4 Slab-on-grade (interior, exterior, sidewalk, flatwork) Surface soils in the site have potential for volume change due to change in moisture content. This slabs should be moisture 6 inch of the subgrade non-expansive fill material (such as ¾” clean crushed rock), Soil Engineer will determine the thickness of replacement on site. Moisture below slabs can Moisture penetration through the slab can be reduced by placing a 6-inch-thick layer of 3/4 (recycled crushed rock is not acceptable) and should be placed on the compacted subgrade instead of 6 inches soil replacement mentioned in the previous paragraph. The rock should be compacted in-place a plastic vapor barrier, at least 15-mil thick, We have no load information and data for the above building so thickness and detail of interior concrete slab-on-grade will be determined by structural engineer, and we are not responsible for it. Exterior Concrete slab-on-grade floors and exterior sidewalk flatwork shall be at least 4 inches in The drain rocks or gravel shall meet the gradation requirement. Table Free-Draining Drain Rocks or Gravel Gradation Requirement Sieve Size Percentage Passing Sieve 100 90-100 0-10 No. 200 0-3 24 Foundation Clearances From Slopes Foundation Clearances From Slopes 10.5 GENERAL CONSTRUCTION REQUIREMENTS Surface Drainage & Irrigation 10.5.1 All finish grades should provide a positive gradient to an adequate discharge point to provide rapid removal of surface water runoff away from all foundation and retaining wall. No ponding of water should be allowed on the pad or adjacent to the foundations. These lot slopes should be provided to aid in the removal of water from the pads and to reduce the amount of water which may seep beneath the building. Surface drainage should be provided as designed by the project engineer or project civil engineer and always maintained by the property owner after work. 10.5.2 Consideration should be given to grading the crawl space under the building (raised floor, shallow foundation system) and to provide an outlet to remove any water trapped under the building. 10.5.3 All finish grade drainage swales must be cut into compacted finish grade. Construction of 25 10.5.6 Any utility trenches extending under the building areas should be backfilled with native on- City of Palo Alto, City of Palo Alto, Department of Public Works. Trench Shoring & Temporary Slopes: 10.5.10 Applicable safety standards require that trenches more than 5 feet must be properly shored 11. CONSTRUCTION OBSERVATION The performance of any project is dependent upon the construction procedures and quality. This will enable us to note any subsurface conditions different than those forming the basis of Therefore, construction observation should be provided during clearing, demolition, 26 base rock placement and all other construction operations referred to in the report or the 12.0 INVESTIGATION LIMITATIONS -Our services consist of professional opinions and recommendations made in accordance with -This report has been prepared to assist in the evaluation of the property and to assist the Standard maintenance should be expected after the initial construction has been completed. 27 APPENDIX Project Name: Laurel Glen Ave. Palo Alto, CA 94303 Owner: Mr. Mr. Mr Ken Ngai Ordered by: Mr. Mr Ken Ngai Owner Address: Laurel Glen Ave. Palo Alto, CA 94303 28 Sieve #Passing % #8 94.75 #16 89.42 #30 82.54 #50 75.86 #100 72.35 70.00 Gravel = 1.5%Sand = 25.75% Fine = 70.99% LL=36.8%, PL=15.4% and PI=21.4 Soil Classification: CL, Lean Clay with Sand Boring B1-Sieve Analysis at depth 2 ft. 29 Boring B1-Sieve Analysis at depth 2 ft. 30 Boring B1-Plasticity Index at depth 2 ft. 31 Sieve #Passing % #8 96.47 #16 88.55 #30 77.57 #50 65.99 #100 55.96 49.02 Gravel = 1%Sand = 51% Fine = 48% LL=41.3%, PL=21.8%, and PI=19.5 Soil Classification: SC-SM, Silty Clayey Sand Boring B3-Sieve Analysis at depth 2 ft. 32 Boring B3-Sieve Analysis at depth 2 ft. 33 Boring B3-Plasticity Index at depth 2 ft. 34 Sieve #Passing % #8 97.85 #16 92.63 #30 81.44 #50 65.22 #100 48.84 37.51 Gravel = 1%Sand = 62% Fine = 37% Soil Classification: SC-SM, Silty Clayey Sand Boring B4-Sieve Analysis at depth 2’ to 6’ ft. 35 Boring B4-Sieve Analysis at depth 2’ to 6’ ft. Faults Map 37 38 Earthquake Coefficients, PGA=1.059 39 Map of expected levels of shaking from future earthquakes based on http://www.consrv.ca.gov/cgs/rghm/psha/index.htm Map of expected levels of shaking 40 San Andreas Fault 41 Ground motion (10% probability of being exceeded in 50 years) in fraction of g 42 Dated drilling: 2/21/2024 Boring: B-1 Figure No. Laurel Glen Ave. Logged by: Farshad Lot 13 SOIL DESCRIPTION Topsoil 12”- vegetated mixed yell, grey, 1 CL 17 120 2’ to 5’ - yellow, weathered bed rock, 76 4 Continued drilling to 8 ft. no changing. - No water encountered.7 ---------------------- ϕ ’ =33o 14 -Dry unit weight ϒdry =120 PCF, ϒtotal=136 Exploratory Boring B-1 43 Dated drilling: 2/21/2024 Boring: B-2 Figure No. Laurel Glen Ave. Logged by: Farshad Lot 13 SOIL DESCRIPTION Topsoil 0” to 24”- vegetated mixed dark 1 CL 16 120 -2’ to 5”- Hard, yellowish brown, sandy silty 19 4 5’ to 10’ - yellowish brown, at 5’ weathered 7 10’ to 15’ - yellowish brown, at 12’ hit weathered rock, sand/siltstone, SPT 16/20/30 10 15’ to 20’ - brownish yellow, weathered 15 Stopped drilling at 20 ft. - Effective stress envelope ϕ’ =33o -weathered rock, siltstone -Dry unit weight ϒdry =120 PCF, ϒtotal=136 PCF, Optimum moisture Wopt=18%. Exploratory Boring B-2 44 Dated drilling: 4/29/2024 Boring: B-3 Figure No. Laurel Glen Ave. Logged by: Farshad Lot 13 SOIL DESCRIPTION Topsoil 0” to 24”- dark brown, sandy silty 21 2 12 SM 22 110 -6’ to 10’, brownish yellow, silty clayey 36 18 110 8 10’ to 15’, yellowish brown, sandy silty clay,10 Stopped drilling at 15ft. 15 ---------------------- ϕ ’ =33o ϒ dry =120 PCF, ϒtotal=136 Exploratory Boring B-3 45 Dated drilling: 4/29/2024 Boring: B-4 Figure No. Laurel Glen Ave. Palo Alto Logged by: Farshad Lot 13 SOIL DESCRIPTION -Topsoil 0” to 24”, vegetated, dark brown, 2 17 -2’ to 6’, yellowish brown, silty clayey sand,SC- 28 110 37 22 110 -6’ to 10’, brownish yellow, silty clayey,6 100 15 10 -10’ to 15’, yellowish brown, sandy silty 43/50 15 -Stopped drilling at 15 ft. At depth 3ft Effective stress envelope ϕ’ =33o Gravel G=1%, Sand S=62%, Fine F=37% ϒ dry =120 PCF, ϒtotal=136 Exploratory Boring B-4 46 GROUP MAJOR DIVISIONS SYMBOLS SOIL DESCRIPTION GW Well Graded Gravels, Gravel-Sand Mixtures, little or COARSE CLEAN GRAVEL GP Poorly Graded Gravels or Gravel- (More than 50 %GRAVEL With Fines (More than 12% fines) GM Silt, Gravels, Gravel-Sand-Silt Mixtures, Non-Plastic More than half Clayey Gravels, Gravel-Sand-Clay SANDS CLEAN SAND SW Well Graded Sands, Gravelly Sands, Little or No Poorly Graded Sands or Gravelly Sands, Little or No(More than 50 % SAND SM Salty Sands, Sand-Silt Mixtures, Non-Plastic Fines With Fines (More than 12% SC Clayey Sands, Sand-Clay Mixtures, Plastic Fines. ML Inorganic Silts, Sandy or Clayey Silts, FINE SILTS & CLAYS GRAINED Liquid Limit is less than 50%CL Inorganic Clay, Sandy or Silty Clay, Low to Medium Organic Silt or Organic Silty Clay, Low to Medium Inorganic Silts, Diatomaceous or Micaceous, Fine SILTS & CLAYS Liquid limit is greater than 50%CH Inorganic Clays of High Plasticity, Fat Clays Organic Clays of Medium to High Plasticity, Organic HIGHLY ORGANIC SOILS PT Peat and Other Highly Organic Soils PARTICLE SIZE LIMITS (Sieve Openings in mm.).074 .425 2.00 4.17 19.0 75.0 300.0 COBBLES BOULDERSGRAVELSAND MEDIUM # 40 FINE COARSE # 10 FINE COARSE (U.S. Standard sieve Sizes)# 200 # 4 3 in 12 in RELATIVE DENSITY CONSISTENCY SANDS, GRAVELS AND BLOWS/FOOT*CLAYS AND PLASTIC SILTS STRENGTH +BLOWS / VERY LOOSE LOOSE DENSE 0 - 4 4 - 8 8 - 16 16 - 32 OVER 32 VERY SOFT SOFT MEDIUM STIFF STIFF VERY STIFF HARD 0 - 1/ 4 1/4 - 1/2 1/2 - 1 1 - 2 2 - 4 OVER 4 0 – 2 2 – 4 4 – 8 8 – 16 16 – 32 OVER 32 ENSE * Numbers of blows of 140 pound hammer falling 30 inches to drive a 2-inch O.D. (1 – 3 / 8 inch I. D.) split spoon (ASTM D -1586). + Unconfined compressive strength in tons/sq. ft. as determined by laboratory testing or approximated by the Standard Key to Exploratory Boring Logs 47 CityꢀofꢀPaloꢀAltoꢀ FireꢀDepartmentꢀ ꢀ ꢀꢀ 10/22/2025 Greetings Zoltan, The Palo Alto Fire Department conducted a flow test for 929 Laurel Glen Drive on 10/3/25. Static- 80psi Please confirm with our Fire Plans Examiners that this data is acceptable for your project. Shannon Ford 250 Hamilton Avenue 6th Floor, Palo Alto CA 94301 Ph: (650) 329-2184 / Fax: (650) 327-6951 fire@cityofpaloalto.org Attachment F Project Plans In order to reduce paper consumption, a limited number of hard copy project plans are provided to Architectural Review Board members for their review. The same plans are available to the public, at all hours of the day, via the following online resources. Directions to review Project plans and environmental analysis online: 1. Go to: paloalto.gov/PermitView 2. Scroll down to find “929 Laurel Glen Drive” and open the record by clicking on the orange dot 3. Review the record details on the left side and open the “more details” option 4. Use the “Records Info” drop down menu and select “Attachments” 5. You will find links to the project plans and other important information Direct Link to Project Webpage: https://www.paloalto.gov/Departments/Planning-Development-Services/Current-Planning/Projects/929- Laurel-Glen-Drive