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02. TM-2006-07 Scott Kelly CITY OF CUPERTINO 10300 Torre Avenue, Cupertino, California 95014 DEPARTMENT OF COMMUNITY DEVELOPMENT REPORT FORM Application: Applicant: Property Owner: Property Location: TM-2006-07, EA-2006-08 Scott Kelly Charles Varian Trust 10114 Crescent Court Agenda Date: July 11, 2006 Application Summary: Tentative Map to subdivide a 2.4 acre parcel into five parcels ranging from 10,254 sq. ft. to 13,176 sq. ft. and a remainder parcel equaling 37,073 sq. ft. to be dedicated to the Santa Clara Valley Water District. The parcel is located in a R1-10 zoning district RECOMMENDATION: Staff recommends that the Planning Commission approve the tentative map, file number TM-2006-07 and EA-2006-08, in accordance with the model resolution. Project Data: General Plan Designation: Zoning Designation: Acreage (gross): Density: Residential Low 1-5 DU/Gross Acre RI-10 104,974 sq. ft. 3.21 du/gr. acre Project Consistency with: General Plan: Zoning: Yes Yes Mitigated Negative Declaration Environmental Assessment: BACKGROUND: The project is located on 10114 Crescent Court and is surrounded by single-family residential uses to the west and south, by the 6.3 acre Varian Park to the north and by Stevens Creek to the east. Currently the site is developed with one single-family residence (see Exhibit A). The home is not considered historic nor is it listed on the City's General Plan Historic Resources List. The home was constructed in 1951 based on the County's database. The residence will be demolished as part of the final map process. DISCUSSION: Site Analysis The project is located in an RI-I0 zoning district with a minimum lot size requirement of 10,000 square feet. The proposed lots range from 10,254 to 13,176 square feet and conform to the minimum lot widths (measured at the front setback line) of 60 feet. The residential density at 3.21 d.u'; gross acre is also consistent with the general plan land use designation (Low Density Residential, 1-5 DU/gr. Acre). At this time, the applicant has not submitted architectural and site plans for the future homes proposed on the lots. However, setback lines have been provided on the map to conceptually show development envelopes in which the future homes could be constructed. J-f TM-2006-07 Page 2 July 11, 2006 The applicant is also making an irrevocable offer of dedication of 37,073 square feet along the creek to either the Santa Oara Valley Water District or the City of Cupertino. The Water District occasionally uses an existing unfinished walkablef drivable path that leads down to the creek for access to conduct maintenance. This dedication is contingent upon the City of Cupertino and the Santa Clara Valley Water District signing a joint use agreement for allowing the future option to use the land for recreational purposes. In the event the two agencies cannot reach an agreement, the dedication of land will revert to the City of Cupertino. This dedication is in conformance with the City's General Plan's Environmental ResourcesjSustainability Element's Goal of "Protection of Special Areas of Natural Vegetation and Wildlife Habitation as Integral Parts of the Sustainable Environment." Policy 5-9: Development Near Sensitive Areas Encourage the clustering of new development away from sensitive areas such as riparian corridors, wildlife habitat and corridors, public open space preserves and ridgelines. New developments in these areas must have harmonious. landscaping plans approved prior to development. Policy 5-11: Natural Area Protection Preserve and enhance the existing natural vegetation, landscape features and open space when new development is proposed. Policy 5-14: Recreation and Wildlife Trails Provide open space linkages within and between properties for both recreational . and wildlife activities, most specifically for the benefit of wildlife that is threatened, endangered or designated as species of special concern. Storm water runoff from the subdivision shall be collected in a new storm water system and conveyed to the existing public storm drainage facilities. No additional drainage shall occur toward the creek thus preserving the existing natural vegetation and landscape features. Private Road Access to the project is by a 22-foot wide private roadway widening to a 28-foot wide roadway (cul-de-sac) from a roadway easement off of Crescent Court. A 28-foot private road provides sufficient room for two l1-foot travel lanes and a six-foot parking lane on the side of the street. "No Parking" signs shall also be posted on the 22-foot wide portions of the private roadway so that the fire lane is kept clear. Staff recommends that the private road be paved with semi-pervious stone pavers or similar interlocking pavers to enhance the storm water quality of the project and to also help preserve the root systems of existing mature trees. This is consistent with other subdivisions that have been approved in single-family neighborhoods. Examples are TM-2004-05, the three lot subdivision on Greenleaf Drive on the CA Water Service property, TM-2004-09, the five lot subdivision on South Stelling Road and more recently a four lot subdivision on Alcazar Avenue, TM-200S-13. ;2-;2 TM-2006-07 Page 3 July 11, 2006 Covenants, Conditions & Restrictions (CC&R) and a private road maintenance agreement shall be submitted to the City for review and approval ensuring that the individual property owners will properly maintain the roadway and' the streetlights. The CC&R will also record a public access easement on the private roadways. Tree Removal The City's Arborist prepared a tree report on the portions of the site that are to be developed (Exhibit B). The report identified 31 trees on-site and 8 trees off-site (identified as # 21, 22 and 34 on Exhibit B). A total of 19 trees are proposed for removal as part of this project (Exhibit C). Out of these trees, ten are coast live oaks of which two trees are considered specimen size (Tree # 4 & 5). Most of the trees removed are either located in the roadway, in building pads, are in poor health, or removal is necessary to keep other trees healthy. The applicant is proposing the removal of the two specimen sized trees on Lot 1 since there are several oak trees in the future rear yard overcrowding the more mature oaks. Staff, with direction from the Environmental Review Committee, recommends that either one or both of the two specimen sized trees be saved if it is possible to prune the oaks without irreparable damage. Staff also recommends that trees #14 and #26, both coast live oaks, be retained as protected trees since they do not interfere with roadways or building pads and are in good health. The City's Consultant Arborist has prepared a report to determine the replacement strategy for the tree removal proposed (Exhibit C). He has provided the replacement value of each of the trees and the average cost of planting different sizes of oak trees. Staff recommends that 60-inch box oak trees be planted in high visibility areas to replace the value of trees being removed. In addition, staff will determine the location of the new oaks being planted prior to the recordation of final map. Geotechnical Review A Geotechnical Report has been prepared for the project by Murray Engineers Inc. The City's Consultant Geologist has reviewed this report and concurs with the findings and recommendations in the report (Exhibit D). The Geologists agree that the cliff is stable and recommend that the buildings and associated improvements on lots 4 and 5 (the two lots closest to the cliff) be set back 25 feet from the top of the cliff and that the residence on lot 5 be supported on drilled piers. Staff recommends that a slope easement be recorded for lots 4 & 5, prohibiting accessory structures, i?cluding porches, including guesthouses, detached garages and swimming pools within 25 feet from the top of the cliff, unless measures to stabilize the cliff are incorporated into the design and construction. The applicant is required to record the condition that the residence on lot 5 shall be supported on drilled piers in the CC&R's for the subdivision. Additionally, two conditions with regard to the Geotechnical requirements need to be recorded in the CC&R's. The conditions require a Geotechnical Plan Review and a Geotechnical Field ;2-.3 TM-2006-07 Page 4 July 11, 2006 Inspection prior to the issuance of building permits as recommended by the City's Geologist. ConshucHonA1anag~ent Since this site is located off a sub-standard right of way and near Stevens Creek, a comprehensive construction operation plan must be submitted to the City for review and approval prior to issuance of grading addressing the following: . Staging area . Tree protection . Construction hours and limits . Construction vehicle and truck routes . Dust and erosion control . Garbage and debris container location and pick up schedule . Signage advising contractors of the restrictions Prepared by: Piu Ghosh, Assistant Planner ,~> Approved by: Steve Piasecki, Director of Community Developm~.-<.......( Enclosures: Model Resolution Plan Set Exhibit A: Location Map Exhibit B: Arborist's report qated April 13, 2006 Exhibit C: Tree Replacement Strategy . Exhibit p: City's Geologist Report . Exhibit E: Recommendation of Environrilental Committee . . . G: \ Planning\PDREPORT\pcTMreports \ TM-2006-07.doc )-/f TM-2006-07 CITY OF CUPERTINO 10300 Torre Avenue Cupertino, California 95014 RESOLUTION NO. OF THE PLANNING COMMISSION OF THE CIlY OF CUPERTINO RECOMMENDING APPROVAL OF A TENT A TIVE PARCEL MAP TO SUBDIVIDE A 2A-ACRE PARCEL INTO FIVE SINGLE F AMIL Y RESIDENTIAL PARCELS WITH AN AVERAGE LOT SIZE OF 11,329 SQ. FT. IN A R1-10 ZONING DISTRICT AND ONE 37,073 SQ. FT. PARCEL TO BE DEDICATED TO THE SANTA CLARA VALLEY WATER DISTRICT LOCATED AT 10114 CRESCENT COURT SECTION I: FINDINGS WHEREAS, the Planning Commission of the City of Cupertino received an application for a Use Permit, as described in Section II of this Resolution; and WHEREAS, the necessary public notices have been given in accordance with the Procedural Ordinance of the City of Cupertino, and the Planning Commission has. held one or more public hearings on this matter; and WHEREAS, the applicant has met the burden of proof required to support said application; and has satisfied the following requirements: 1) The proposed use, at the proposed location, will not be detrimental or injurious to property or improvements in the vicinity, and will not be detrimental to the public health, safety, general welfare, or convenience; and 2) The proposed use will be located and conducted in a manner in accord with the Cupertino Comprehensive General Plan and the purpose of this title. NOW, THEREFORE, BE IT RESOLVED: That after careful consideration of maps, facts, exhibits, testimony and other evidence submitted in this matter, the application for Use Permit is hereby recommended for approval, subject to the conditions which are enumerated in this Resolution beginning on Page 2 thereof; and That the subconclusions upon which the findings and conditions specified in this resolution are based and contained in the public hearing record concerning Application No. TM-2006-07 as set forth in the Minutes of the Planning Commission Meeting of July 11,2006, and are incorporated by reference as though fully set forth herein. SECTION II: PROTECT DESCRIPTION Application No.: TM-2006-07 Applicant: Scott Kelly (Nancy Fedders and Charles Varian) Location: 10114 Crescent Court ~-5 Resolution Page 2 TM-2006-07 July 11, 2006 SECTION III: CONDITIONS ADMINISTERED BY THE COMMUNITY DEVELOPMENT DEPT. 1. APPROVED EXHIBITS The recommendation of approval is based on Exhibit titled: "Tentative Tract Map, 10114 Crescent Court, Cupertino, CA," consisting of 1 pages stamped June 16, 2006, except as may be amended by the Conditions contained in this Resolution. 2. IRREVOCABLE OFFER OF DEDICATION The applicant shall make an irrevocable offer of dedication to the Santa Clara Valley Water District subject to the requirement that the City of Cupertino and the Water District sign a Joint Use Agreement. If the City and the Water District are unable to reach an agreement, the offer of dedication shall revert to the City of Cupertino. 3. PRIVATEROADWAYMATERIAL The private roadway shall be paved with interlocking permeable pavers or similar material on sand. 4. NO PARKING ZONE The portion of the roadway that is 22 feet wide shall have 'No Parking' signs-' posted per City standards. 5. NEW RETAINING WALL ALONG ROADWAY The retaining waIl alongthe roadway shall be no taller than 2 feet and shall be clad in attractive materials such as stone veneer or natural stone.' , 6. PUBLIC ACCESS EASEMENT Applicant shall record a public easement access over the private roadway. The agreement shall be recorded in conjunction with recordation of the final map, and shall be subject to prior approval as to form and content by the City Attorney. 7. TREE REMOV AL No trees other than those shown being removed on the Tentative Map or fruit trees have been approved for removal as part of this subdivision. The trees to be protected shall also be recorded as outlined in condition #11 below. In the event that any of the protected trees must be removed due to reasons deemed appropriate by the Director of Community Development, then comparable diameter replacement tree(s) must be planted at the same location or at locations visible to the public. The applicant shall also save the two specimen sized oaks proposed for removal on Lot 1. The applicant may in consultation with the City's approved Arborist thin out and shape the oaks. If the arborist determines that this is not possible without significant damage to the tree, the trees may be removed, with approval from the Director of Community Development, and replaced by two 60-inch box or field grown oak trees. A revised Tentative Map shall be submitted showing d.--1o Resolution Page 3 TM-2006-07 July 11, 2006 protected prior to application of the Architectural and Site Approval application for the new homes. The applicant shall plant coast live oaks, in numbers deemed appropriate by the Director of Community Development and in places visible to the public subject to an arborist's report, for the trees that are being removed excluding the two specimen sized oaks mentioned above. 8. TREE PROTECTION As part of the demolition or building permit drawings, a tree protection plan shall be prepared by a certified arborist for the trees to be retained and trees on neighboring properties but identified by the arborist as being at risk during construction. In addition, the following measures shall be added to the protection plan: a. For trees to be retained, chain link fencing and other root protection shall be installed around the drip line of the tree prior to any project site work. b. No parking or vehicle traffic shall be allowed under root zones, unless using buffers approved by the Project Arborist. c. No trenching within the critical root zone area is allowed. If trenching is needed in the vicinity of trees to be retained, the City's consulting arborist shall be consulted before any trenching or root cutting beneath the drip line of the tree. d. Tree protection conditions shall be posted on the tree protection barriers. e. Retained tree shall be wCltered according to the requirements of the tree to maintain them in good health. The tree protection measures shall be inspected and approved by the certified arborist prior to issuance of building permits. The City's consulting arborist shall inspect the trees to be retained and shall provide reviews prior to issuance of demolition, grading or building permits. A report ascertaining the good health of the trees mentioned above shall be provided prior to issuance of final occupancy. 9. TREE PROTECTION BOND The applicant shall provide a tree protection bond in the amount of $60,000 to ensure protection of 14 oak trees, 1 Colorado Spruce tree on the site prior to issuance of grading, demolition or building permits. The bond shall be returned after completion of construction, subject to a letter from the City arborist indicating that the trees are in good condition. 10. COVENANTS, CONDITIONS & RESTRICTIONS (CC&R's). Covenants, Conditions and Restrictions (CC&Rs) that address the following shall be recorded: a. Roadway Maintenance Agreement: A reciprocal maintenance agreement shall be required for all parcels that share a common private drive or private roadway with one or more other parcels within the tract. '. ;1-'1 Resolution Page 4 TM-2006-07 July 11, 2006 b. Protected Trees: Trees to be retained are: #1, 2, 3, 4, 5, 8, 13, 14, 16, 18, 20, 23, 26, 28, 29 and 30. New trees are to be planted the location of which shall be reviewed and approved by the Director of Community Development and recorded in the CC&R's. c. Slope Easement: A slope easement shall be recorded at the rear of lots 4 and 5 of the subdivision for a 25-foot easement from the top of the cliff. The top of the cliff does not coincide with the property line. d. Future Trail: A note shall be recorded that informs future homeowners that the City of Cupertino owns land around the subdivision and there might be future trails along Stevens Creek. e. Lot 5 Foundation: The residence on Lot 5 shall be supported on drilled pIers. f. Geotechnical Plan Review: The applicant's Geotechnical consultant should review and approve all Geotechnical aspects of the development plans (i.e., site preparation and grading, site drainage improvements and design parameters for foundation and retaining walls) to ensure that their recommendations have been properly incorporated. The results of the Geotechnical plan review should be submitted by the Geotechnical consultant in a letter and submitted to the City for review and approval by City Staff prior to approval of building permits. g. Geotechnical Field Inspection: The Geotechnical consultant should inspect, test (as needed), and approve all Geotechnical aspects of the project construction. The inspections should included, but not necessarily be limited to: site preparation and grading, site surface and subsurface drainage improvements and excavations for foundation and retaining walls prior to the placement of steel and concrete. The results of these inspections and the as-built conditions should be described by the Geotechnical consultant in a letter and submitted to the City Engineer for review prior to final project approval. The CC&R's shall be recorded in conjunction with recordation of the final map, and shall be subject to prior approval as to form and content by the City Attorney. 11. CONSTRUCTION MANAGEMENT PLAN A construction management plan shall be prepared by the applicant and approved by staff prior to issuance of building permits. Staging of construction equipment shall riot occur within 20 feet of any residential property or within 25 feet of the top of cliff on lots 4 & 5. 12. NOTICE OF FEES, DEDICATIONS, RESERVATIONS OR OTHER EXACTIONS The Conditions of Project Approval set forth herein may include certain fees, dedication requirements, reservation requirements, and other exactions. Pursuant to Government Code Section 66020(d) (1), these Conditions constitute written notice of a statement of the amount of such fees, and a description of the dedications, reservations, and other exactions. You are hereby further notified ;l~) Resolution Page 5 TM-2006-07 July 11, 2006 that the 90-day approval period in which you may protest these fees, dedications, reservations, and other exactions, pursuant to Government Code Section 66020(a), has begun. If you fail to file a protest within this 90-day period complying with all of the requirements of Section 66020, you will be legally barred from later challenging such exactions. SECTION IV: CONDITIONS ADMINISTERED BY THE PUBLIC WORKS DEPARTMENT 13. STREET WIDENING Street widening, improvements and dedications shall be provided in accordance with City Standards and specifications and as required by the City Engineer. 14. ROAD SITE IMPROVEMENTS Curbs and gutters, sidewalks, retaining walls and related structures shall be installed in accordance with grades and standards as specified by the City Engineer. 15. STREET LIGHTING INSTALLATION - , Street lighting shall be installed and shall be as approved by the City Engineer. Lighting fixtures shall be positioned so as to. preclude glare and other formsQf! , visual. interference to adjoining properties, :and . shall be no higher than. the . . . ". I _ ' " . c maximum heighfpermitted by the zone in which the site is located. ' 16. FIRE HYDRANT .' . . Fire hydrants shall be located as requi,red by the City, Santa Clara County, Fire and San Jose Water Company, as needed. 17. GRADING Grading shall be as approved and required by the City Engineer in accordance with Chapter 16.08 of the Cupertino Municipal Code. 401 Certifications and 404 permits maybe required. Please contact Army Corp of Engineers and/ or Regional Water Quality Control Board as appropriate. 18. DRAINAGE Drainage shall be provided to the satisfaction of the City Engineer. Development in all other zoning districts shall be served by on site storm drainage facilities connected to the City storm drainage system. If City storm drains are not available, drainage facilities shall be installed to the satisfaction of the City Engineer. * Pre and Post Development Calculations are required to determine if additional storm drain facilities shall be required. 19. FIRE PROTECTION Fire sprinklers shall be installed in any new construction to the approval of the City and Santa Clara County Fire, as needed. 20. UNDERGROUND UTILITIES The developer shall comply with the requirements of the Underground Utilities ;l-CJ Resolution Page 6 TM-2006-07 July 11, 2006 Ordinance No. 331 and other related Ordinances and regulations of the City of Cupertino, and shall coordinate with affected utility providers for installation of underground utility devices. The developer shall submit detailed plans showing utility underground provisions. Said plans shall be subject to prior approval of the affected Utility provider and the City Engineer. 21. IMPROVEMENT AGREEMENT The project developer shall enter into a development agreement with the City of Cupertino providing for payment of fees, including but not limited to checking and inspection fees, storm drain fees, park dedication fees and fees for under grounding of utilities. Said agreement shall be executed prior to issuance of construction permits. Fees: a. Checking & Inspection Fees: $2,130.00 min. b. Grading Permit: $ 5% of Road Site Improvement Costs or $ 6% of Site Improvement Costs or $2,000.00 min. c. Development Maintenance Deposit: $ 3,000.00 d. Storm Drainage Fee: $3,096.00 e. Power Cost: ** f. Map Checking Fees: $ 6,750.00 g. Park Fees: $ 63,000.00 h. Street Tree By Developer ** Based on the latest effective PG&E rate schedule approved by the Public Utility Commission (P.U.c.) Bonds: a. Faithful Performance Bond: 100% of Road Site improvements b. Labor & Material Bond: 100% of Road Site improvements c. Grading Bond: 100% of site improvements -The fees described above are imposed based upon the current fee schedule adopted by the City Council. However, the fees imposed herein may be modified at the time of recordation of a final map or issuance of a building permit in the event of said change or changes, the fees changed at that time will reflect the then current fee schedule. 22. TRANSFORMERS Electrical transformers, telephone vaults and similar above ground equipment enclosures shall be screened with fencing and landscaping or located underground such that said equipment is not visible from public street areas. 23. DEDICATION OF WATERLINES The developer shall dedicate to the City all waterlines and appurtenances installed to City Standards and shall reach an agreement with San Jose Water for water service to the subject development. ~....,D Resolution Page 7 TM-2006-07 July 11, 2006 24. AMENDED DEVELOPMENT BEST MANAGEMENT PRACTICES (BMPt REQUIREMENTS The applicant must include the use and maintenance of site design, source control and stormwater treatment BMP's, which must be designed per approved numeric sizing criteria. The property owners with treatment BMPs will be required to certify on-going operation and maintenance. Also, the applicant and the City shall enter into a recorded agreement and covenant running with the land for perpetual BMP maintenance by the property owners(s). In addition, the owner(s) and the City shall enter into a recorded easement agreement and covenant running with the land allowing City access at the site for BMP inspection. 25. NPDES CONSTRUCTION GENERAL PERMIT The applicant must obtain a notice of intent (NOI) from the State Water Resources Control Board, which encompasses a preparation of a Storm Water Pollution Prevention Plan (SWPPP), use of construction Best Management Practices (BMP' s) to control storm water runoff quality and BMP inspection and maintenance. 26. EROSION CONTROL PLAN The developer must provide an approved erosion control plan by a Registered Civil Engineer. This plan should include all erosion control measures used to retain materials on-site. Erosion Control notes shall be stated on the plans. 27. LETTERS OF APPROVAL ." The developer must gain will serve letters from all utility companies prior to issuance of final map. In addition, the applicant must obtain written authorization from the Santa Clara Valley Water District (SCV\ND) and all other applicable agencies prior to issuance of final map. CITY ENGINEER'S CERTIFICATE OF ACCEPTANCE OF ENGINEERING/SURVEYING CONDITIONS (Section 66474.18 of the California Government Code) I hereby certify that the engineering and surveying conditions specified in Section IV. Of this resolution confonn to generally accepted engineering practices Ralph Qualls, Director of Public Works City Engineer CA License 22046 PASSED AND ADOPTED this 11th day of July 2006, at a Regular Meeting of the Planning Commission of the City of Cupertino, State of California, by the following roll call vote: J-{I EVALUATION OF TREES AT KELL Y GORDON DEVELOPMENT, 10114 CRESCENT COURT. CuPERTINO 2 Assignment I was asked by Mrs. Ciddy Wordell, City of Cupertino, to evaluate the existing trees located at 10114 Crescent Court, Cupertino. The plan provided for this evaluation is the Tentative Tract Map prepared by Nelsen Engineering, Sheet 1, dated March 2006. Summary A total of39 trees are included in this inventory. Of these 39 trees, 31 are located on this property. and 8 are located on adjacent properties. All of the 38 trees are identified and given condition ratings. Some trees and/or circumstances concerning them are briefly described here. Of the total 39 trees, Trees # 1.3.4.5.8. 13, 18.20.24.29.30. and 34 are protected by city regulation. Of these 12 protected trees. Trees # 4,5,8, 18, and 24 are proposed to be removed by the current plan. Procedures are recommended here to help presezve those "Specimen Trees" planned to be retained in their present locations. Observations There are 39 trees included in this tree survey. Trees # 1-20 and # 23-33 are located on this site. Tree # 21 (representing 3 specimens). Tree # 22 (representing 4 specimens). and Tree # 34 are located on neighboring properties. These neighboring trees are located near the property boundary and may be exposed to damage by trenching, excavation, or soil compaction. For this reason, these neighboring trees are included. The attached map shows the locations of all 39 trees and their approximate canopy dimensions. Numbered metal labels have been affixed to only the trees that are located on this property for field reference. No labels were affixed to the trees on neighboring properties. The 39 trees are classified as follows: Trees # 1-5. 7-14, 18,20,24,26,28.29.30.34 - Coast live oak (Quercus agrifolia) Tree # 6 - Acacia (Acacia species) Tree # 15 - Avocado (Persea Americana) Trees # 16. 17 - Colorado blue spruce (Picea pungens glauca) Tree # 19 - Silk tree (A/biziajulibrissin) Tree # 21 - Juniper species (Juniperus species), representing 3 topiary trees Tree # 22 - Italian cypress (Cupressus sempervirens), representing 4 essentially identical specimens Tree # 23 - Coast redwood (Sequoia sempervirens) Tree # 25 - Carolina Laurel Cherry (Pnmus caroTiniana) Tree # 27 - California pepper (Shinus molle) Tree # 31 - Eucalyptus (Eucalyptus species) Tree # 32 - Bailey's Acacia (Acacia bai/eyana) Tree # 33 - Bronze loquat (Eriobotrya deflexa) Prepared by: Michael L. Bench, Consulting Arborist April131b, 2006 :2 -I f.c EVALUATION OF 1REES AT KELLY GORDON DEVELOPMENT, 10114 CRESCENT COURT, CUPERTINO 3 The particulars about these 39 trees (species. trunk diameter. height. spread, and structure) are included in the attachments that follow this text. In addition to these 39 trees. there are also approximately 25 fruit trees oflow quality primarily on the Lots # 1,2. and 3. There are also numerous trees located on the steep slope toward the south side of Lots # 4 and 5. None of these trees are included in this survey. The health and structure of each specimen is mted on a scale of 1-5 (Excellent - Extremely poor) on the data sheets attached to this text. Based on these health and structure ratings combined, I have given each tree an overall condition rating as follows: Excellent S cimens 1,3,714. 16'17.20, 21,22,28, 29, 33 Good S cimens 2, 8, 13.23, 26 27.30, 34 Fair S cimens 4,5,6.9. 10. 11. 12 18, 25.31 Poor S ecimens 24,32. Extremely Poor S imens 15, 19 Methods The trunk measurements of the existing trees are taken using a standard measuring tape at 4 ~ feet above soil grade. This is referred to as DBH (Diameter at Breast Height). The height and canopy spread of each tree is estimated using visual references only. The estimated shape of the canopy relative to the other nearby trees has been added to the attached map. Comments about Specific Trees Trees # 4, 5. and 18, all coast live oaks (Q. agrifolia). are stump sprout specimens. This means that the original leader had been damaged or removed. The new leaders, usually several, growing from the stump are poorly attached and highly prone to splitting out. This poor structural condition does not significantly improve as the tree matures. Trees # 9. 10, 11. and 12, all coast live oaks (Q. agrifolia), have been "topped". As a result, they win always have weak: branching structures where the topping had occurred. Tree # 19, a Silk tree (Albiziaju/ibrissin). is actively splitting in half. I suggest this tree be removed regardless of construction. Tree # 23, a coast redwood (S. sempervirens) has a wire tied around one leader to support the existing wood fence. This wire is girdling the leader and should be removed. Another method would have to be used to support the fence. Tree # 24, a coast live oak: (Q. agrifolia) has grown through an existing chain link fence. The interlocking wire goes completely through the trunk at about 4 feet above grade. This often results in a weak: trunk structure. Prepared by: Michael L. Bench. Consulting Arborist April 13th, 2006 /),1 EVALUATION OF TREES AT KELLY GORDON DEVELOPMENT. 10114 CRESCENT COURT. CUPERTINO 4 Protected Trees The City of Cupertino (Chapter 14.18 )" finds that the preservation of specimen and heritage trees on private and public property, and the protection of all trees during construction, is necessary for the best interests of the City and of the citizens and the public thereof." The ' City "finds it is in the public interest to enact regulations controlling the care and removal of specimen and heritage trees..." A "Heritage Tree" means "any tree or grove of trees which, because of factors, but not limited to, its historic value, unique quality, girth, height or species, has been found by the Architectural and Site Approval Committee to have a special significance to the community." A "Specimen tree" means any of the following: Species Measurement from Single Trunk Multi-Trunk Natural Grade Diameter/Circwnference Diameter/Circumference Oak trees~ 4 '12 feet 10 inches (31 inches C) 20 inches D (63 inches C) California Buckeye Big Leaf 4 '12 feet 12 inches (38 inches C ) 25 inches D (79 inches C) Maple~ Deodar Cedar; Blue Atlas Cedar The "Specimen Trees" at this site are: Trees # 1,3,4,5,8, 13, 18,20,24,29,30, and 34. Should construction occur as proposed, the following "Specimen Trees" would be removed: Trees # 4, 5, 8, 18, and 24. Risks to Trees by Proposed Construction The management of materials and equipment, often as part of the staging area(s), commonly poses a risk to existing trees. Protective fencing is the primary defense for existing trees. Prevention is key to tree protection, because repair or remediation is usually ineffective. The trees at this site would likely be at risk of damage by construction or construction procedures that are common to most construction sites. These procedures may include the dumping or the stockpiling of materials over root systems, may include the trenching across the root zones for utilities or for landscape irrigation, or may include construction traffic across the root system resulting in soil compaction and root die back. If underground utilities are installed, it would be essential that the location of the trenches must be planned prior to construction, and that the trenches be located at the exact locations . . as shown on the proposed plans. . Currently chain link fencing is in place protecting coast live oak Tree # 34. Should this fence or a portion of this fence be removed for construction of the new roadway, Tree # 34 may be exposed to risk of damage on its west side. Prepared by: Michael L. Bench, Consulting Arborist April 131h,2oo6 ~-1B EV ALUA nON OF TREES AT KELL Y GOROON DEVELOPMENT. 10114 CRESCENT COURT. CUPERTINO 5 Also, there is an open space on the east side of the existing driveway across from Trees # 6 and 7. Should this be used as a staging area, Tree # 34 may also be as risk of materials and equipment parked or piled inside its dripline, if the existing fence were removed. Although Trees # 21(representing 3 topiary junipers) and # 22 (representing 4 Italian cypress trees) are not protected by the city ordinance, it is likely that these trees are important to the neighbor. If grading were to occur to the west side property boundary, these 7 trees may suffer serious root damage. If grading were to be a minimum of 6 feet from the west side property boundary, these 7 trees should not be damaged. Recommendations 1. I recommend that protective fencing be provided during the construction period to protect those trees that are to be preserved This fencing must protect a sufficient portion of the root zone to be effective. The recommended locations of protective fencing are provided on the attached map. Occasionally it may be essential to have a certified arOOrist make decisions about the location(s) of protective fencing at the project site. I recommend that protective fencing must: . Consist of chain link fencing and having a minimum height of 6 feet. . Be mounted on steel posts driven approxiritately 2 feet into the soil. . Fencing posts must be located no further than 10 feet apart. . Protective fencing must be installed prior to the arrival of materials, vehicles, or equipment. . Protective fencing must not be moved, even temporarily, and must remain in place until all construction is completed. 2. There must be no grading, trenching, or surface scraping inside the driplines of protected trees, unless specifically described in another section of this report. I recommend that there be no grading within 6 feet of the west side property boundary in relation to Trees # 21 and 22. 3. Trenches for any utilities (gas, electricity, water, phone, TV cable, etc.) must be located outside the driplines of protected trees~ unless approved by a certified arborist. 4. If Trees # 16 and 23 are preseIVed, they must be irrigated throughout the entire construction period during the dry months (any month receiving less than 1 inch of rainfall). Irrigate a minimum of 10 gallons for each inch of trunk diameter every two weeks. A soaker hose or a drip line is preferred for this purpose. - 5. Materials must not be stored, stockpiled, dumped, or buried inside the driplines of protected trees. 6. Excavated soil must not be piled or dumped, even temporarily~ inside the driplines of protected trees. 7. Any pruning must be done by an arborist certified by the ISA (International Society Prepared by: Michael L. Bench. Consulting Arborist April13tb, 2006 a -Ie, EVALUATION OF TREES AT KELt Y GOROON DEVELOPMENT, 10114 CRESCENT COURT. CUPER'IDlO 6 of Arboriculture) and according to IS~ Western Chapter Standards, 1998. 8. Any pathways or other hardscape inside the driplines of protected trees must be constructed completely on top of the existing soil grade without excavation. Fill soil may be added to the edge of finished hardscape for a maximum distance of approximately 2 feet from the edges to integrate the new hardscape to the natural grade. 9. The sprinkler irrigation must not be designed to strike the trunks of trees. 10. Landscape irrigation trenches must be a minimum distance of 10 times the trunk diameter from the trunks of protected trees. II. Landscape materials (cobbles, decorative bark, stones; fencing; etc.) must not be installed directly in contact with the bark of trees because of the risk of serious disease infection. 12. The plants that are planted inside the driplines of oak trees must be of species that are compatible with the environmental and cultural requirements of oaks trees. A publication about plants compatible with California native oaks can be obtained from the California Oak Foundation, 1212 Broadway; Suite 810, Oakland, 94612. Respec~~ltt ~ -~.,. .. ~ - Michael L. Bench, Associate 'IJ.~ BeD. Coate; Principal MLB/sh Enclosures: Assumptions and Limiting Conditions Map Tree Chart Prepared by: Michael L. Bench. Consulting Arborist April 131h,2006 ;L - :;Lo BARRIE D. COATE and ASSOCIATES 14001353-1052 nsns..Uoad llII ~CA 95030 Plant Name Tree # 1 Coast Live Oak --------- ------------------~-~------------ Quercus agrifolia 2 Coast Live Oak _________ ___________~w____________________ 3 Coast Live Oak --------- ----------------~---------------- --------------------------------- 4 Coast Live Oak --------- -------------------------------~- --------------------------------- 5 Coast Live Oak --------- --------------------------------- --------------------------------- 6 Acacia --------- --------------------------------- Acada spedes 7 Coast Live Oak --------- --------------------------------- 8 Coast Live Oak --------- --------------------------------- 9 Coast Live Oak --------- --------------------------------- 10 Coast Live Oak --------- -______________________M_________ ~ \ ~ Measurements Condition ! : ! , , , , , , I , . : I : , , , , , 1 , ....... o ..... , C'l - : I . . ! I- W W I- 0 u.. 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I 1 -----~----+---~---.--_._-~---- , J I ~ , I I I ~ ~ I J t I I It. I . I . I 1 f I I . 1 J -----;----t---1r-~-t------t---- I I I I , : ! !! ! , I . I . I I I I I I I I I . -----~-___.___~___4-_____.---- . I . I I . I I I I I I I I I , , , , , , , I , ---t---~---i---. , , , ! ~ ! ii, I , , ---:---~--~--_.. . , , . , , , , , 1 , , , , , , , , ---t---~---i---. , , . ! ! ! , , I , , f , , t ---.---~---~--- , , , , , . , , I : : i , I , ---t---~---i---. , I , : : : , , , , , , , , , ---1---~---,---- , , , , I , --- .......... ---. ....... 1 = Best, 5 = Worst Page 1 of 4 BARRIE D:COATE and ASSOCIATES 1400, 353-1052 23m s..il Road 1M Catos, CA 95030 Tree # Plant Name 11 Coast Live Oak --------- ---------------------~----------- 12 Coast Live Oak --------- ---------.._--------------------- 13 Coast Live Oak .~-~~--~- ~~.._---------------------~------ 14 Coast Live Oak ----~---- --._----------------------------- 15 Avocado --------- -------------------.~._---------- . Persea americana ---~~--- ~~~~~~~~-~~!!_~~~~--._---- Picea pungens glauca 17 Colorado Blue Spruce 18 Coast Live Oak 19 Silk Tree Albizia julibriss;n 20 Coast Live Oak ~ .& Measurements ! ! ; ! , , , , , , ! Condition ! ! - o I- .- W N ~ tJ@fa (9 ~ ~!q:~ '9~ ..: ,:::!: C'l ~::= ~ <( @H~ @i= ~ U7 ~ zO:: "" ',(/) ." .... w.... ',>- 0:: W w ~,::> 0 I- IU? w I- 0 I; I- F ~ IF, tJ a L5 ~! g 0 <( ,...J I I J: ~ _ 0::: <( I 0::: z _PI co co <( W,o. WII- 0 o ;~: 0 0 : (5 I I (f) I I en U ; ,: ; .; ;; l 7. , , , .15,15 1, 4, , ----f--~---~----i---~---~--- ~---~--.~----+--- I I 'Ii I I I '" : : ; . ~ : ~ ~!: I I . I .. ... 7' , , , '12' 15 l' 4' , I I I I I I I I I ----.--~___~____4-_-~-__~___ ____~___~___.--~ . , . I I I I I I . , . . I I I I I I I , . . I I I I ; : : : :: ::: 13' , , , · 25' 20 l' 3' , ----~--~---~----i---~---~--- ---~---~---f--- , I I . 'I I I I t. I I J I I I , ~ I I I t I ... ,. I . .. .. I 6 I: I : 115; 15 1; 1; : ----&--~---~____.___~___~___ ___~___J____6___ . .. I I I' It.. I I I . .. I f I , t I . I I J'. ; ~ i ; : ~ 21' , , , , 10' 15 ~----~--~---~----~---~---~--- I . . 1- I , I . . , I , . I t I I . I I . . I . 14 1 : I : 125: 15 ~----t--~---_r----~-~-lr---~--- I I J I I , ! I . I I . ! !!!! 11 20;20 ~ ~ ~ 3' 5' · ----~---~---~--- , , , , , , , , , , , , 1 : 1: : ----~---1----t---. , , , , , , ! 1 ! : ! ! ! I 12: ..J: 12! 11/! 30130 I ! 8: l : ! l ! 13 20 30 1 4 ; ! :J 9 Iv i ! , , ; ; ; 8 1 5 ! , 11 ! ..J: 9 ! , , I : : ! 12 15 25 1 1 : ; ; Job Name: Kelly Gordon Development, 10114 Crescent Court, Cupertino Job #: 04-06-075 Date: April 13th, 2006 Pruning/Cabling Needs ! , , - C'l .- , "o:t - l- I (9 ~ ~ (f) 0 -,Z <('w 0:::1 ~l~ 0:::= O:::'W ulo::: ~ o W o W W Z 00, W, ...J I co: <(' u: , C> Z ~ ; I ; ; : : I . I I , , ---f----~---~----~---~---f--- . , I I . I ~ ; : : : ! I . . . I . t , . I I I f I I I , . -~-.---~---~----~---~---.--- .. I . 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I I.., t ~ I r I I r ! ~: t i : i : :! ! Ii!!! I 'I I . I 1 I I I r :.. r I 1 r r r I t . J I I 1 , , , , ! ~ . , I I I ! i ~ ; : : I I I , , ~ , , ~ , , ~ : i ; : Status ---. ...... ("- LU W 0::: I- UJ C) j:!: 0::: W I ("- W W a::: ..... o W I- U W ..... o 0:: a. -~-- +........ ---- ...... ---- ....... ..ofIIIo__ ........ ...--.. ....... 1 = Best, 5 = Worst Page 2 of 4 Tree # 21 22 23 BARRIE D. COATE and ASSOCIATES (400) 3S} 1052 23535 ..it Road l.e5 Calos, CA 9503l1 Plant Name 24 Juniper Juniperus species Italian Cypress Cupmssussempennrens Coast Redwood Sequoia sempennrens Coast Live Oak ~.~.~~~~~..~~Y!.!:l!.g.~!~.............._ Prunus carofiniana 26 Coast Live Oak 25 ___?~___ ~~~!Qn)l~_!:~JP~!______________ Shinus mofle 28 Coast Live Oak --------- --------------------------------- 29 Coast Live Oak --------- ---------------------------~----- 30 Coast Live Oak ~ ~ \3J Measurements ! ! l! 1 t- W W U. ~ ..... , , ''''''' '<:t...::; Q\'w v;t- o:;en wl>- t-:U? w,- ;:!:'t- <(I-l -p c.;:!: . I- W W 11- 'N @ 0: w I- W I :2: III,<( OjB o W I- <( ::!: i= en w o i1i 0::: W a. I,(/) o w ~ :a: I- en w l- I C) I 101 5 ! ; 1 . 40; 6 , , . ! ! 80j35 ! I , , , 15115 i 1 i : I ; 8' · , , '15' 15 ............ ~._~. n~.. ~+. ......;....... ...;........ ;..... .... ~........ I I 4 I I , . . ~ , I , I I I . I I Condition ! ! 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I 1 , , I . , =It Ql ~ I- I I I "...' ("')1 I I , pj - "<t ~ "- ~ 0 '<:t II Q) OJ 10 <tl -- a.. 0 Q) CO II ..... 0 c: "E Q) Q. ::J 0 -e :J 0 0 - c: B (() Q) '- 0 v ..... ..... 0 ..- -- C Q) E c. 0 Q) > Q) 0 c 0 "2 ~ 0 C>ll) 0 N ~" ~ ~9 - M ..8 ..- Q)-.t 'C Eo Q. co <( z:i:t ~ .c.c 0 0 m ...., ...., 0 ;2'J-tf BARRIE D. COATE and ASSOCIATES Hor1it:Ulural Consultarlls 23535 Summit Road Los Gatos, CA 95033 4081353-1052 1. Any legal description provided to the appraiser/consultant is assumed to be correct. No responsibility is assumed for matters legal in character nor is any opinion rendered as to the quality of any title. 2. The appraiser/consultant can neither guarantee nor be responsible for accuracy of information provided by others. 3. The appraiser/consultant shall not be required to give testimony or to attend court by reason of this appraisal unless subsequent written arrangements are made, including payment of an additional fee for services. 4. Loss or removal of any part of this report invalidates the entire appraisal/evaluation. 5. Possession of this report or a copy thereof does not imply right of publication or use for any purpose by any other than the person(s) to whom it is addressed without written consent of this appratser/consultant. 6. This report and the values expressed herein represent the opinion of the appraiser/consultant, and the appraiser's/consultant's fee is in no way contingent upon the reporting of a specified value nor upon any finding to be reported. 7. Sketches, dlagrams, graphs, photos, etc., in this report, being intended as visual aids, are not necessarily to scale and should not be construed as engineering reports or surveys. 8. This report has been made in conformity with acceptable appraisal/evaluation/diagnostic reporting techniques and procedures, as recommended by the International Society of Arboriculture. 9. When applying any pesticide, fungicide, or herbicide, always follow label instructions. 10. No tree described in this report was climbed, unless otherwise stated. We cannot take responsibility for any defects which could only have been discovered by climbing. A full root collar inspection, consisting of excavating the soil around the tree to uncover the root collar and major buttress roots. was not performed, unless otherwise stated. We cannot take responsibility for any root defects which could only have been discovered by such an inspection. Arborists are tree specialists who use their education, knowledge, training, and experience to examine trees, recommend measures to enhance the beauty and health of trees, and attempt to reduce risk of living near trees. Clients may choose to accept or disregard the recommendations of the arborist, or to seek additional advice. Arborists cannot detect every condition that could possibly lead to the structural failure of a tree. Trees are living organisms that fail in ways we do not fully understand. Conditions are often hidden within trees and below ground. Arborists cannot guarantee that a tree will be healthy or safe under all circumstances, or for a specified period of time. Likewise, remedial treatments, like medicine, cannot be guaranteed. Trees can be managed, but they cannot be controlled. To live near trees is to accept some degree of risk. The only way to eliminate all risk associated with trees is to eliminate all trees. rfiahJUe ~ t; ~ Barrie D. Coate ISA Certified Arborist Horticultural Consultant ;}.'::15 Assignment EXHIBIT C I have been asked by Piu Gosh, Planner, City of Cupertino, to provide a replacement strategy for the trees that would be removed at the Kelley-Gordon Development Project, 10114 Crescent Court, Cupertino. The trees planned to be removed, for which a replacement strategy is requested, are Trees # 4,5,6,7,9, 10, 11, 12, 14, 15, 17, 19,24,25,26,27,31,32, and 33. Replacement Strategy It has been our practice to recommend replacements based on the appraised value of the trees planned to be removed. The values of the trees for this project are addressed according to ISA (International Society of Arboriculture) standards, 9th Edition, Trunk formula method. The trunk formula method is based on an individual tree's trunk diameter (or diameters in the case of multi-stem specimens), but includes adjustments for the following elements:. . Species performance in this climate area . The species rate of growth (this is related to growth rates of nursery stock and the cost to produce them; the cost per square inch of trunk diameter addresses the fact that slower growing plants are more costly to produce) . The tree's overall current condition . The tree's location (this factors in an impression of the general condition of the area, the contribution that this tree has provided to the site, and the importance of that contribution relative to other specimens on site) Using the trunk formula method as designed by the ISA, I have applied it to the Microsoft Excel spreadsheet program in order to complete the calculations. By this process, the appraised values are as follows: Tree # 4 - Coast live oak- Tree # 5 - Coast live oak- Tree # 6 - Acacia species - Tree # 7 - Coast live oak- Tree # 9 - Coast live oak- Tree # 10 - Coast live oak - Tree # 11 - Coast live oak - Tree # 12 - Coast live oak - Tree # 14 - Coast live oak- Tree # 15 - Persea Americana- Tree # 17 - Picea pungens 'Glauca' - Tree # 19 - Albizia julibrissin - Tree # 24 - Coast live oak- Tree # 25 - Prunus caroliniana - $ 2530.00 $ 1770.00 $ 360.00 $ 1850.00 $ 540.00 $ 540.00 $ 730.00 $ 730.00 $ 900.00 $ 170.00 $ 1570.00 $ 90.00 $ 720.00 $ 680.00 J.. -:21 Tree # 26 - Coast live oak - Tree # 27 - Schinus malle- Tree # 31 - Eucalyptus species - Tree # 32 - Acacia baileyana- Tree # 33 - Eriobotryia deflexa- $ 840.00 $ 2600.00 $ 200.00 $ 40.00 $ 4250.00 Total Appraised Value $ 21,110.00 A copy of the Excel spreadsheet calculations, including factored percentages impact on value, can be provided upon request. In terms of replacements trees, I recommend that native species nursery stock specimens be used, such as coast live oak (Quercus agrifolia). I suggest any combination ofthe following sizes approximately equal to the above total value: boxed specimen - average cost planted 24 inch box - $ 375 36 inch box - $ 1000 48 inch box - $ 2125 54 inch box - $ 2650 60 inch box - $ 3500 72 inch box - # 10,000 Respectfully submitted, MLB/BDC :L -'.216 SCALE, 1" ~ 20' FOUNQ,.3/4"IP.ON PIPE PR S4)'10'4S"E ---:- :;.<.':~, i.;:-~' ---- >- , '" _'" 'f"-- ~ -f- I} h l..~T-:2. ~ ~ ~ 10,49 $G, r:T. b on I " I I I I I '" :" p4~ "-'-: 1''' 0" on " I I L_________ 148 it> " " " r;---------- - , L.;OT-S 10,'0' SQ. FT. 'I I , I I I I I I . I EX, ~OT UNE iC ~E :;.;~ k';j\Tt~ N4117'17"W 150.32' ------a:::-- .., o o ",0 <Co; u0 <C ~~ "'0 '" on :;; i" '" N "- I' o '" z 150 I I I \ \ \ \ -' I I I I / ' --- ---Ii - . =0 N-1'2foo"W 5, CENTERLINE ROAD EL=lD1.81 FlOWIJ~E CUP.B ffi~1 01.36 23 1~. MULTI TRUNK ~ED'MJOO , ~;P""" " .... ~2.5Y; HORTICULTURAL CONSULTANTS CONSULTING ARBORISTS BARRIE D. com and ASSOCIA rES ~00)3\~1a;2 2353SSaIIlIlUoad lo5Ga1.os,CA m30 Evaluation of trees at 1I1e Kelly Gordon Development Project .. INSTALL CONC, CUR8. CUTTER PER CITY ST^NDARDS (SEE DETAil) 8 IN, CLASS 2 A,S OVER PROPERLY COMPACTED SUE GRADE 10114 Crescent Court, Cupertino. EXIST. GRA~ Requested by: Giddy Wordell, GItl, of Cupertino \ Prepared by. Michael L. Bench, Consulting Arborist Tn:>Cl nllmhono ....................^....1 t... ........1.._.:__ _1..._"'_ Date: ril13th, 2006 Job # 04-06-075 I.OIIPOIMT""'.IMl_ ra.... COTTON, SHIRES & ASSOCIATES, INC. ... CONSULTING ENGINEERS AND GEOLOGISTS RECEIVED JUN 2 3 2006 June 21, 2006 C0036A TO: Ciddy Wordell Cupertino City Planner CITY OF CUPERTINO 10300 Torre Avenue Cupertino, California 95014 EXHIBIT D SUBJECT: RE: Supplemental Geologic and Geotechnical Peer Review Kelly, Proposed Subdivision 10114 Crescent Court At your request, we have completed a supplemental geologic and geotechnical peer review of the subject application for a proposed subdivision using the following documents: . Geotechnical Investigation (report) prepared by Murray Engineers, Inc., dated June 13, 2006. In addition to our review of the above referenced documents, we have reviewed pertinent technical data from our office files and have had discussions with the Project Geotechnical Engineer. DISCUSSION The applicant proposes to subdivide the existing property into 6 parcels. We understand that one parcel will be donated to the Santa Clara Valley Water District and the remaining 5 are proposed for future residential development. A new extension from the east end of Crescent Court would be constructed for access to the parcels. An existing residence will be demolished to accommodate the subdivision. An existing unimproved access road to Stevens Creek would become part of Water District property. Portions of the property are within State defined Earthquake Induced Landslide and Liquefaction Zones. It is our understanding that sanitary sewer effluent of future proposed residences would be piped to the sanitary sewer pipeline in Crescent Court. In our previous review report, dated April 12, 2006, we recommended that an engineering geologic investigation be performed to address the long-term stability of the terrace embankment on Lots 4 and 5, characterize the site seismic setting, and provide appropriate geologic recommendations for residential development. In addition, we recommended that supplemental geotechnical engineering recommendations be provided. CONCLUSIONS AND RECOMMENDED ACTION Based . upon our review of the referenced document, it appears that Murray Engineers, Inc. (ME!) has assumed the role of Project Geologist and Project Geotechnical Northern California Office 330 Village Lane Los Gatos, CA 95030-7218 (408) 354-5542 . Fax (408) 354-1852 e-mail: losgatos@cottonshires.com www.cottonshires.com Central California Office 6417 Dogtown Road San Andreas, CA 95249-9640 (209) 736-4252 · Fax (209) 736-1212 e-mail: cottonshires@starband.net J, -;ltl Ciddy Wordell Page 2 June 21, 2006 C0036A Engineer. MEI has performed a geologic and geotechnical investigation of the site, including the excavation of two additional exploratory boreholes, and has performed analyses of the potential for geologic hazards to adversely impact the proposed lots. They conclude that the steep embankment of Stevens Creek has the potential to constrain development on portions of Lots 4 and 5, but if appropriate setbacks are incorporated, and pier-supported foundations are utilized where recommended, then the site is suitable for the proposed subdivision. Based upon our review of the slope stability analysis performed on the steep embankment adjacent to Lot 4, it appears that MEI has utilized regional shear strength data tabulated for the Cupertino Quadrangle by the California Geologic Survey. It is our opinion that site specific data is generally more appropriate than the regional data, which is intended as more of a guideline than for site specific use. By correlating the on-site blow count data to shear strength parameters (friction angles), we have evaluated the slope stability analysis performed by MEI where regional shear strength parameters have been used, and conclude that their analysis may overestimate the factor of safety by 10 to 15 percent. Since ME!' s seismic slope stability screening analysis resulted in a factor of safety of 1.16, the 10% to 15% difference could still result in a factor of safety of greater than 1.0. Consequently, it is our opinion that MEI's recommended 25-foot setback appears justified. If it is desired to extend portions of the development into the 25-foot setback zone, then , recommendations for deep, reinforced concrete piers should be provided. . Consequently, we recommend approval of the Tentative Tract Map from a geologic and geotechnical standpoint. The following should be performed prior to building permit approval: 1. Geotechnical Plan Review - The applicant's geotechnical corumltant should review and approve all geotechnical aspects of the development plans (i.e., site preparation and grading, site drainage improvements and design parameters for foundations and retaining walls) to ensure that their recommendations have been properly incorporated. The results of the geotechnical plan review should be summarized by the geotechnical consultant in a letter and submitted to the City for review and approval by the City Staff prior to approval of building permits. 2. Geotechnical Field Inspection - The geotechnical consultant should inspect, test (as needed), and approve all geotechnical aspects of the project construction. The inspections should include, but not necessarily be limited to: site preparation and grading, site surface and subsurface drainage improvements and excavations for foundations and retaining walls prior to the placement of steel and concrete. The results of these inspections and the as-built conditions of the project should be described by the geotechnical consultant in a letter and submitted to the City Engineer for review prior to final project approval. COTTON, SHIRES & ASSOCIATES, INC. ;2.-:0 Ciddy Wordell Page 3 June 21, 2006 C0036A LIMITATIONS This peer review has been performed to provide technical advice to assist the City with discretionary permit decisions. Our services have been limited to review of the documents previously identified, and a visual review of the property. Our opinions and conclusions are made in accordance with generally accepted principles and practices of the geotechnical profession. This warranty is in lieu of all other warranties, either expressed or implied. Respectfully submitted, COlTON, SHIRES AND ASSOCIATES, INC. CITY GEOTECHNI AL CONSULTANT \\ Jo M. Wallace Associate Engin~ering Geologist CEG 1923 ~.'J ::> Patrick 0, Shires Principal Geotechnical Engineer GE 770 JMW:POS:st COTTON, SHIRES & ASSOCIATES, INC. ;2-3, EXHIBIT E CITY OF CUPERTINO RECOMMEND A TION OF ENVIRONMENTAL REVIEW COMMITTEE June 28, 2006 As provided by the Environmental Assessment Procedure, adopted by the City Council of the City of Cupertino onMay 27, 1983, as amended, the following described project , was reviewed by the Environmental Review Committee of the City of Cupertino on June 28, 2006. PROTECT DESCRIPTION AND LOCATION Application No.: Applicant: Location: TM-2006-07 (EA-2006-08) Scott Kelly (Kelly Gordon Developement) 10114 Crescent Court DISCRETIONARY ACTION REQUEST Tentative Map to subdivide a 2.4 acre property into five parcels, with parcel sizes greater than 10,000 square feet and an approximately 35,000 square foot parcel for creek dedication FINDINGS OF THE ENVIRONMENTAL REVIEW COMMITTEE The Environmental Review Committee recommends the granting of a Mitigated Negative Declaration finding that the project is consistent with the General Plan and has no si . icant~~.rozironmental impacts. c" . C '-,- I ...:- / 1 \ '.>'1.-H.,/(- > Steve PiaseckI Director of Community Development g/ercfREC EA-2006-08 c2 -3~ ,O'JeO.EPU8UC S.I.NIlAA~ SE:\IO: (.l.&:\IDlT ,.." lClJ:U rOUND 3/4"IRON ?IPE PROJECT UNFORMATION APPIJCJ/iT: K!:llY GORDON DE\lELOPNENT CORP, 12241 SARAToGA SUNNYVALE RD. SARATOGA CAUFORNIA 95070 408-873-8n4 ENCINEER: ~--- _ ~,~.~Fm~~ ==fi'=" PfI:: r.AS J loNOWA1EIIUNfS OrNER: THE FEDDERS VARIAN UVlNG TRUST 10114 CRESCENT COURT CUPERTINO CAUFORNlA 95014 408-255-0980 ---..lal .~lFflET_GllIIU ......... \~to(~~ ~j.2A-= ~T~ / $6- I -..., I----.!P---- I~-~~t-~ \ ~ e. . I / ! j LOT~iAAYS(~.~f / \ , 10,592 SQ. FT. Y ~~ ~~~O" /~-~'\: (\ / " \ L 1 // IC~4-.l2~ -. -K ~_~~=-~..-~~_______________Il S411Tll'"<: r--------~--~~~-----=fl'f. Wl.l',J co I" FO!l(,l, WT ,,, I PROVll:EI'R(lP(IItNT~ ~ 11 '" .....-'1 i. S- I .:r I \ ~~ TC.I47.'\8~. , \ 'I" J 1 I \ 4 / I.. . \\' \ ...~~tEDBlUESPRI,ICf/!- '---K. I J ~148_ LOT-2 \/ ,I, 10,254 SQ. FT. 1\ L---~_----~t~:---------_J '~.7T 1 PROPOSED NUJ/BER OF LOTS: 5 '5.I.IULT1~KCAK MARIUS E. NELSEN, R.C.E. 20597, EXP. 9/07 NElSEN ENGINEERING 21 BDl 5TEVENS CREEK BOULEVARD CUPERTINO, CAUFORNIA, 95014- TEL ('lOB) 257-6452 FAX; (408) 257-6821 PI/OPEI/TY AlJDRESS AND APN: 10114 CRESCENT CT. 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