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HomeMy WebLinkAbout1 LEGOLAND DR; ; CB072878; PermitCity of Carlsbad 1635 Faraday Av Carlsbad, CA 92008 12-05-2007 Retaining Wall Permit Permit No CB072878 Building Inspection Request Line (760) 602-2725 Job Address 1 LEGOLAND DR CBAD Permit Type RETAIN Status ISSUED Parcel No 2111000900 Lot# 0 Applied 11/16/2007 Valuation $11,05200 Construction Type NEW Entered By LSM Reference # Plan Approved 12/05/2007 Issued 12/05/2007 Project Title LOST KINGDOM-BUILD 614 SF Plan Check# KEYSTONE RETAINING WALL Inspect Area Applicant Owner TERRY MONTELLO LEGOLAND CALIFORNIA INC <LF> PLAY U S ACQUISITI 4715 60TH ST ONE LEGOLAND DR SAN DIEGO 92115 CARLSBAD, CA 92008 6199945557 Building Permit $12555 Add'l Building Permit Fee $0 00 Plan Check $81 61 Add'l Plan Check Fee $0 00 Strong Motion Fee $111 Renewal Fee $0 00 Add'l Renewal Fee $0 00 Other Building Fee $0 00 Additional Fees $0 00 TOTAL PERMIT FEES $208 27 Total Fees $20827 Total Payments To Date $8161 Balance Due $12666 •BUILDING PLANS ~^-IN STORAGE ATTACHED FINAL APPROVAL Inspector (C*-H3*SSS*^~ Date //fW/tf Clearance NOTICE Pleaso take NOTICE that approval of your project includes the Imposition of fees dedications, reservations, or other exactions hereafter collectively referred to as lees/exactions You have 90 days from the date this permit was issued to protest imposition of these fees/exactions If you protest them you must follow the protest procedures set forth in Government Code Section 66020(a) and file the protest and any other required information with the City Manager for processing in accordance with Carlsbad Municipal Code Section 3 32 030 Failure to timely follow that procedure will bar any subsequent legal action to attack reviow sot aside void or annul their imposition You are hereby FURTHER NOTIFIED that your right to protest the specified fees/exactions DOES NOT APPLY to water and sewer connection fees and capacity changes nor planning zoning grading or other similar application processing or service fees in connection with this project NOR DOES IT APPLY to any Iocs/exactions of which you have previously been given a NOTICE similar to this, or as to which the statute of limitations has previously otherwise expired City of Carlsbad 1635 Faraday Ave , Carlsbad, CA 92008 760-602-2717 / 2718/2719 Fax 760-602-8558 Building Permit Application Plan Check No. G£8 Est. Value I \, O Plan Ck. Deposit SI.I Date U \ JOB ADDRESS .' Ct/PROJECT * DESCRIPTION OF WOR | SUITE#/SPACE#/UNIT# PHASE*! fSOF UNITS" # BEDROOMS TSBATHROOMS TENANT BUSINESS NAME I Kfl^Vymwwq \NO\\ CONSTR TYPE I OCC GROUP bl ^ (Sec 7031 5 Business and Professions Code Any City or County which requires a permit to construct, alter, improve demolish or repair any structure, prior to its issuance, also requires the applicant for such permit to fie a signed statement that he is licensed pursuant to the provisions of the Contractor s License Law {Chapter 9 commending with Section 7000 of Division 3 of the Business and Professions Code} or that he is exempt therefrom, and the basis for the alleged exemption Any violation of(SlicSection 703 1 5 by any applicant for a permit subjects the applicant to a civil penalty of not more than five hundred dollars {$500}) Workers' Compensation Declaration / hereby affirm under penalty ofpequry one of the following declarations I I have and will maintain a certificate of consent to self insure for workers compensation as provided by Section 3700 of the Labo' Code for the performance of the work for which this permit is issued L3 I have and will maintain workers' compensation as required by Section 3700 of the Labor Code, for the performance of the work for which this permit is issued My workers compensation insurance carrier and policy number are Insurance Co »3A<tNc.Y 6 pQRO'eV <-*- Policy No W^"3° ' ofe I°OT Expiration Date _2/ This section need not be completed if the permit is for one hundred dollars ($100) or less I Certificate of Exemption I certify that in the performance of the work for which this permit is issued I shall not employ any person in any manner so as to become subject to the Workers Compensation Laws of California WARNING Failure to secure workers' compensation coverage is unlawful, and shall subject an employer to criminal penalties and civil fines up to one hundred thousand dollars (&1 00,000), in addition to the cost of compensation, damages as provided for in Section 3706 of the Labor code, interest and attorney's fees i^ CONTRACTOR SIGNATURE DATE / hereby affirm that I am exempt from Contractor s License Law for the following reason n I as owner of the property or my employees with wages as their sole compensation will do the work and the structure is not intended or offered for sale (Sec 7044 Business and Professions Code The Contractor s License Law does not apply to an owner of property who builds or improves thereon and who does such work himself or through his own employees provded that such improvements are not intended or offered for sale If however the building or improvement is sold within one year of completion the owner builder will have the burden of proving that he did not build or improve for the purpose of sale) n I as owner of the property am exclusively contracting with licensed contractors to construct the project (Sec 7044 Business and Professions Code The Contractor s License Law does not apply !o an owner of property who builds or improves thereon and contracts for such projects with contractors) licensed pursuant IP the Contractor s License Law) l~l I am exempt under Section Business and Professions Code for this reason 1 I personally plan to provide the major labor and materials for construction of the proposed property improvement il Yes CI No 2 I (have / have not) signed an application fo< a building permit for the proposed work 3 I have contracted with the following person (firm) to provide the proposed construction (include name address / phone / contractors' license number) 4 I plan to provide portions of the work but I have hired the following person to coordinate supervise and provide the major work (include name / address / phone / contractors license number) 5 I will provide some of tho wo.fi< bul I two contracted (hired) (ho fol!owmg pevsnns to provide the worl< indicated (include name / address / phone / type of work) >€$VROPERTY OWNER SIGNATURE DATE Is the applicant or future building occupant reguired to submit a business plan acutely hazardous materials registration form or risk management and prevention program under Sections 25505 25533 or 25534 of the Presley Tanner Hazardous Substance Account Act' O Yes fl No Is the applicant or future building occupant required to obtain a permit from Ihe air pollution control district or air quality management district" D Yes d No Is the facility to be constructed within 1 000 feet of the outer boundary of a school site7 D Yes G No IF ANY OF THE ANSWERS ARE YES, / EMERGENCY SERVICES AND THE AIR POLLUTION CONTROL DISTRICT I I hereby affirm that there is a construction lending agency for the performance of the work this permit is issued (Sec 3097 (i) Civil Code) Lenders Name Lenders Address I I certify that I have read the application and state that the above information is correct and that the information on the plans is accurate I agree to comply with all City ordinances and State laws relating to building construction thereby authorize representative of the City of Carlsbad to enter upon the above mentioned property for inspection purposes I ALSO AGREE TO SAVE INDEMNIFY AND KEEP HARMLESS THE CITY OF CARLSBAD AGAINST ALL LIABILITIES JUDGMENTS COSTS AND EXPENSES WHICH MAY IN ANY WAY ACCRUE AGAINST SAID CITY IN CONSEQUENCE OF THE GRANTING OF THIS PERMIT OSHA An OSHA permit is required for excavations over 5 0 deep anekfeniolition or construction of structures over 3 stones in height EXPIRATION Every permit issued by the Building Official under rjWprovisWlt of this Code shall expire by limitation and become null and void if the building or work authonzed by such permit is not commenced within 180 days from the date of such permit or if the builtaj orwodbau^orayyyBuch permit is suspended or abandoned at any time after the work is commenced for a penod of 180 days (Section 106 4 4 Uniform Building Code) ^APPLICANT'S SIGNATURE f\^i'f//'\/f^J^^ DATE EsGil Corporation In Partnership with government for Quitting Safety DATE 12/4/07 JURISDICTION City of Carlsbad a PLAN REVIEWER Q FILE PLAN CHECK NO O72878 SET II PROJECT ADDRESS Legoland Dr. PROJECT NAME Keystone Retaining Walls The plans transmitted herewith have been corrected where necessary and substantially comply with the jurisdiction's building codes Xj The plans transmitted herewith will substantially comply with the jurisdiction's building codes when minor deficiencies identified below are resolved and checked by building department staff The plans transmitted herewith have significant deficiencies identified on the enclosed check list and should be corrected and resubmitted for a complete recheck The check list transmitted herewith is for your information The plans are being held at Esgil Corporation until corrected plans are submitted for recheck The applicant's copy of the check list is enclosed for the jurisdiction to forward to the applicant contact person The applicant's copy of the check list has been sent to XI Esgil Corporation staff did not advise the applicant that the plan check has been completed Esgil Corporation staff did advise the applicant that the plan check has been completed Person contacted Telephone # Date contacted (by ) f/1/ Fax # Mail Telephone Fax In Persoij XI REMARKS 1 City to approve the/social inspection program 2 No revised plan needed By David Yao / Enclosures Esgil Corporation D GA n MB D EJ n PC log 9320 Chesapeake Drive, Suite 208 *• San Diego, California 92123 + (858)560-1468 * Fax (858) 560-1576 EsGil Corporation In (Partners Hip with government for Quitting Safety DATE 11/29/07 CUAPPHCANT (OJURIS__J> JURISDICTION City of Carlsbad a PLAN REVIEWER a FILE PLAN CHECK NO 072878 SET I PROJECT ADDRESS Legoland Dr. PROJECT NAME Keystone Retaining Walls The plans transmitted herewith have been corrected where necessary and substantially comply with the jurisdiction's building codes The plans transmitted herewith will substantially comply with the jurisdiction's building codes when minor deficiencies identified below are resolved and checked by building department staff The plans transmitted herewith have significant deficiencies identified on the enclosed check list and should be corrected and resubmitted for a complete recheck X The check list transmitted herewith is for your information The plans are being held at Esgil Corporation until corrected plans are submitted for recheck ~^\ The applicant's copy of the check list is enclosed for the jurisdiction to forward to the applicant contact person XI The applicant's copy of the check list has been sent to Terry Montello 4715 60th St San Diego, CA 92115 Esgil Corporation staff did not advise the applicant that the plan check has been completed XI Esgil Corporation staff did advise the applicant that the plan check has been completed Person contacted Terry Mentello Telephone # 619-994-5557 Date contacted///Z^/^?(by/^0) Fax # 619-229-0642 Mail Telephone Fax y/ln Person REMARKS By David Yao Enclosures Esgil Corporation D GA D MB D EJ D PC 11/20 9320 Chesapeake Drive, Suite 208 *• San Diego, California 92123 + (858)560-1468 *• Fax (858) 560-1576 City of Carlsbad 072878 11/29/O7 GENERAL PLAN CORRECTION LIST JURISDICTION City of Carlsbad PROJECT ADDRESS Legoland Dr. DATE PLAN RECEIVED BY ESGIL CORPORATION 11/20 REVIEWED BY David Yao PLAN CHECK NO O72878 DATE REVIEW COMPLETED 11/29/07 FOREWORD (PLEASE READ): This plan review is limited to the technical requirements contained in the Uniform Building Code, Uniform Plumbing Code, Uniform Mechanical Code, National Electrical Code and state laws regulating energy conservation, noise attenuation and disabled access This plan review is based on regulations enforced by the Building Department You may have other corrections based on laws and ordinances enforced by the Planning Department, Engineering Department or other departments The following items listed need clarification, modification or change All items must be satisfied before the plans will be in conformance with the cited codes and regulations Per Sec 106 4 3, 1997 Uniform Building Code, the approval of the plans does not permit the violation of any state, county or city law • To facilitate rechecking, please identify, next to each item, the sheet of the plans upon which each correction on this sheet has been made and return this sheet with the revised plans • Please indicate here if any changes have been made to the plans that are not a result of corrections from this list If there are other changes, please briefly describe them and where they are located on the plans Have changes been made not resulting from this list9 Yes No City of Carlsbad 072878 11/29/07 Important Notice Regarding the 2007 CBC If you are an architect, engineer, designer or contractor that performs work within the State of California, please be advised that a new building code will take effect on January 1, 2008 The new building code is based on the 2006 International Building Code (IBC) and it is significantly different than the Uniform Building Code (UBC) All plan review applications submitted after December 31. 2007 will be required to comply with the new code The 2007 CBC is currently available for purchase directly from the International Code Council, at www iccsafe org 1 Please make all corrections, as requested in the correction list Submit three new complete sets of plans for commercial/industrial projects (two sets of plans for residential projects) For expeditious processing, corrected sets can be submitted in one of two ways 1 Deliver all corrected sets of plans and calculations/reports directly to the City of Carlsbad Building Department, 1635 Faraday Ave , Carlsbad, CA 92008, (760) 602-2700 The City will route the plans to EsGil Corporation and the Carlsbad Planning, Engineering and Fire Departments 2 Bring one corrected set of plans and calculations/reports to EsGil Corporation, 9320 Chesapeake Drive, Suite 208, San Diego, CA 92123, (858) 560-1468 Deliver all remaining sets of plans and calculations/reports directly to the City of Carlsbad Building Department for routing to their Planning, Engineering and Fire Departments NOTE Plans that are submitted directly to EsGil Corporation only will not be reviewed by the City Planning, Engineering and Fire Departments until review by EsGil Corporation is complete 2 When special inspection is required, the architect or engineer of record shall prepare an inspection program which shall be submitted to the building official for approval prior to issuance of the building permit Please review Section 106 3 5 Please complete the attached form 3 Provide a letter from the soils engineer confirming that the foundation plan, grading plan and specifications have been reviewed and that it has been determined that the recommendations in the soils report are properly incorporated into the construction documents (page 6 of the soil report( 10/26/07)) 4 The jurisdiction has contracted with Esgil Corporation located at 9320 Chesapeake Drive, Suite 208, San Diego, California 92123, telephone number of 858/560-1468, to perform the plan review for your project If you have any questions regarding these plan review items, please contact David Yao at Esgil Corporation Thank you f City of Carlsbad O72878 11/29/07 i City of Carlsbad Bu i Idi ng ;D,epa:rtm^nts BUILDING DEPARTMENT NOTICE OF REQUIREMENT FOR SPECIAL INSPECTION i Do Not Remove From Plans Plan Check No O72878 l Job Address or Legal Description Legoland Dr. Owner Address You are hereby notified that in addition to the inspection of construction provided by the Building Department, an approved Registered Special Inspector is required to provide continuous inspection during the performance of the phases of construction indicated on the reverse side of this sheet t The Registeied Special;Inspector shall be approved by the City of Carlsbad Building Department prior to the- issuance of the building permit Special Inspectors having a current certification from the City of San Diego, Los Angeles, or ICBO are approved as Special Inspectors for the type of construction for which they are certified The inspections by a Special Inspector do not change the requirements for inspections by personnel of the City of Carlsbad building department. The inspections by a Special Inspector are m addition to the inspections normally required by the County Building Code !ii The Special Inspector is not authorized to inspect and approve any work other than that for which he/she is specifically assigned! to inspect The Special Inspector is not authorized to accept alternate materials, structural changes, or any requests for plan changes The Special Inspector is required to submit written leports to the City of Carlsbad building department of all work that he/she inspected and approved The final inspection approval will not be given until all Special Inspection reports have been received and approved by the City of? Carlsbad building departmenti Please submit the names of the inspectors who will perform the special inspections on each of the items indicated on the reverse side of this sheet (over) too d 91SI 099 898 TIDS3 09 80 <LOOZ-eO-D3Q 900 d 1V10J, City of Carlsbad 0,72878 11/29/07 ; SPECIAL INSPECTION PROC5RAM ADDRESS OR LEGAL DESCRIPTION: PLAN CHECK NUMBER: Ol OWNER'S NAME. I, as the owner, or agent of the owner (contractors may not employ the special inspector), certify that 1, or the architect/engineer of record, will be responsible for employing the special mspector(s) as required by Uniform Buildma Code (UBC) Section 1701 1 for the construction project located at the site listed above UB<E Sectiort 106.3.5 Signed I, as the engineer/architect of record, certify that 1 have prepared the following special inspection program as required by UBC Section: 106 3.5 for the construction project located at the site listed above Signed !i 1 List of work requiring special inspection: G Soils CompliancejPrior to Foundation Inspection H Structural Concrejte Over 2500 PS! _ Prestressed Concrete _ Structural Masonry C] Designer Specified I 2. Name(s) of individual(s) or firm(s) responsible for the special inspections listed above: f • A. QlAJ KteYL^ 'AChgTJ'f /r^gQ"T<FC.rl-/oi CA-t, <f37Of7 » <z>fl cnfr&IL . A? D Field Welding D High Strength Bolting Q Expansion/Epoxy Anchors Sprayed-On Fireproofing Other 3. Duties of the special inspectors for the work listed above LC Special inspectors shall check m with the City and present their credentals for approval cnorjto beginning work on the job site SOO d 9iST 099 898 dHOO 1ISS3 og so City of Carlsbad O72878 11/29/07 VALUATION AND PLAN CHECK FEE JURISDICTION City of Carlsbad PLAN CHECK NO 072878 PREPARED BY David Yao DATE 11/29/07 BUILDING ADDRESS Legoland Dr. BUILDING OCCUPANCY TYPE OF CONSTRUCTION BUILDING PORTION retaining Walls Air Conditioning Fire Sprinklers TOTAL VALUE Jurisdiction Code AREA (Sq Ft) 614 cb RIHn Pprmil- FPP hv Orrimanrp "V Valuation Multiplier 1774 By Ordinance Reg Mod VALUE ($) 10,892 10,892 $117 15 Plan Check Fee by Ordinance Type of Review LTl Repetitive FeeRepeats Complete Review D Other •—i Hourly Structural Only Hour Esgil Plan Review Fee $7615 $6560 Comments Sheet 1 of 1 macvalue doc PLANNING/ENGINEERING APPROVALS PERMIT NUMBER CB DATE }\-\°\-'=t- ADDRESS I LgQO RESIDENTIAL TENANT IMPROVEMENT RESIDENTIAL ADDITION MINOR « $10,000.00) PLAZA CAMINO REAL CARLSBAD COMPANY STORES VILLAGE FAIRE COMPLETE OFFICE BUILDING OTHER PLANNER DATE ENGINEER DATE 7 Docs/Mlsforms/Ptannmg Engineering Approvals f - Leighton and Associates, inc. A I £[Gt-lQS< ftpCI'P -£>>, PAV*! December 4, 2007 Project No 960151-025 To Legoland California One Lego Drive Carlsbad, California 92008 Attention Mr Chris Romero Subject Geotechmcal Review of Keystone Retaining Wall Plans, Proposed Lost Kingdom Attraction, Legoland Theme Park, Carlsbad, California In accordance with your request and authorization, we have performed a geolechmcal review of the Keystone retaining wall plans and calculations prepared by Red One Engineering, Inc (Red One Engineering, 2007a and 2007b) Based on our review of these plans and project geotechmcal reports (Leighton 2007a and 2007b), the plans have been prepared in general accordance with the project geotechmcal recommendations Limitations The conclusions and recommendations in this report are based m part upon data that were obtained from a limited number of observations, site visits, excavations, samples, and/or tests Such information is by necessity incomplete The nature of many sites is such that differing geotechmcal or geological conditions can occur within small distances and under varying climatic conditions Changes in subsurface conditions can and do occur over time Therefore, the findings, conclusions, and recommendations presented in this report can be relied upon only if Leighton has the opportunity to observe the subsurface conditions during grading and construction of the project, in order to confirm that our preliminary findings are representative for the site 3934 Murphy Canyon Road, Suite B205 s San Diego, CA 92123-4425 8582928030 a Fax 858 292 0771 a www leiqhtonqeo com 960151-025 If you have any questions regarding our report, please contact this office We appreciate this opportunity to be of service Respectfully submitted, LEIGIITON AND ASSOCIATES, INC Sean Colorado, GE 2507 Principal Engineer Attachments Appendix A - References Distribution (1) Addressee (1) R W Apel, Attention Mr Richard Apel (1) Red One Engineering, Attention Mr MattMerritt (1) Roel Construction, Attention Mr Sean Mitchell Leighlcn 960151-025 APPENDIX A REFERENCES Leighton and Associates, Inc, 2007a, Update Geotechmcal Report, Proposed Adventurer's Attraction, Lego land California, Carlsbad, California, Project No 960151-026, dated September 12, 2007, revised October 19, 2007 , 2007b, Grading Recommendations and Geotechmcal Review of Precise Grading and Foundation Plans for Proposed Lost Kingdom Attraction, Legoland Theme Park, Carlsbad, California, Project No 960151-025, dated October 19, 2007 Red One Engineering, Inc, 2007a Keystone Retaining Wall Structural Calculations, Lost Kingdom, City of Carlsbad, California, W O #337-094, dated November 12,2007 -, 2007b Lost Kingdom, City of Carlsbad, California, Sheets 1 — 3, dated December 3, 2007 A-l Leighton and Associates, Inc. A LEIGHTON GROUP COMPANY July 25, 2007 Revised October 26, 2007 Project No 960151-026 i:. To Legoland California. Inc One Legoland Drive Carlsbad, California 92008 Attention Mr Chris Romero Subject Preliminary Geotechmcal Design Recommendations Report, Proposed Seahfe Center. Legoland California, Carlsbad, California References Leighton and Associates, Inc, 1999, Final As-Graded Report of Rough'-Grading, LEGO Family Park, Carlsbad, California , 2004, Geotechmcal Investigation, Proposed Dino Island Attraction, Legoland Theme Park, Carlsbad, California, Project No. 960151-021, dated February 23, 2004 R W Apel, Seahfe Center, Sheets 3, 6, 8, dated July 6, 2007 Introduction Leighton and Associates is pleased to present this Preliminary Geotechmcal Recommendations letter report for the proposed foundations at the site of the Sealife Center We have reviewed previous geotechmcal and grading reports for the project area as well as other published and unpublished literature and sources Below is a summary of our findings followed .cby recommendations Findings and Recommendations Based on review of the as-graded report,'the site of the proposed area of Seahfe Center is situated across a cut to fill transition Along the westerly portion of the proposed building; shallow compacted fills were placed during the original site mass grading Quaternary Terrace Deposits 3934 Murphy Canyon Road, Suite B205 « San Diego, CA 92123-4425 858.292 8030 a Fax 858 292.0771 E www leightongeo com 960151-026 (Qt) underlie the fill materials and were mapped within the easterly portion of the site during mass grading (Leighton, 1998) The Terrace deposits consist of orange to reddish brown, damp to moist, medium dense to dense, silty fine to medium grained sand and overhe Tertiary Santiago Formation Top 3 ft to 5 ft of Terrace deposits that were weathered and/or disturbed by agriculture was removed and replaced by compacted fill during grading operations (Leighton, 1998) Per the as-graded report, the Artificial Fill was compacted to a minimum of 90 percent relative compaction (ASTM D1557) The onsite materials are not considered liquefiable It is noted that the as-graded maps show a storm dram pipe below the west wall of proposed structure Storm dram pipe backfill was placed as uncontrolled fill during mass grading and may require remedial measures It is further noted that undocumented fills may also overhe portions of the site that have been raised above the mass graded elevations for landscape contouring purposes The site is suitable for the proposed development provided undocumented fills and cut/fill transitional conditions are addressed Further review of planned site grading and foundation elevations is needed to develop remedial measures The following design parameters may be used in the design of the structure foundations Allowable Soil Pressure (Spread) = 2,500 psf (one Allowable Soil Pressure (Mat) = 1,500 psf (one Modulus of Subgrade Reaction = 250 pci Coefficient of Friction = 035 Passive Pressure (Level Ground) = 300 psf/ft Active Retaining Pressure = 35 pcf At-Rest Retaining Pressures - 55 pcf Lateral Surcharge (Traffic) = 75 psf Lateral Surcharge (Uniform Pressure) = 0 35q Seismic Zone Factor, Z -= 4 Soil Profile Type = Sc Seismic Coefficient, Ca ==0 40Na Seismic Coefficient, Cv =0 56Na Near Source Factor, Na =10 Near Source Factor, Nv =11 Seismic Source Type = B -third increase for short-term loading) -third increase for short-term loading) (3,000 psf max) (level backfill) (level backfill) (auto traffic surcharge) where q is the uniform pressure (Table 16-1, 2001CBC) (Table 16-J, 2001 CBC) (Table 16-Q, 2001 CBC) (Table 16-R, 2001 CBC) (Table 16-8,2001 CBC) (Table 16-T, 2001 CBC) (Table 16-U, 2001 CBC) Spread footings should be at least 18 inches below lowest adjacent soil Reinforcement should be designed by the structural engineer Continuous footings should contain at least 2 No 5 bars, top and bottom Slabs should be at least 5 inches thick reinforced with No 3 bars at 18 inches on center, each way Slabs designed to carry structural loads may require increased thickness and reinforcing Slab underlayment should be designed by the project architect We recommend a minimum horizontal setback distance from the face of slopes for all structural footings and settlement-sensitive structures This distance is measured from the outside edge of the -2- Leiqhton 960151-026 footing, horizontally to the slope face (or to the face of a retaining wall) and should be a minimum of 7 feet We should note that the soils within the structural setback area possess poor lateral stability, and improvements (such as retaining walls, sidewalks, fences, pools, pavement, underground utilities, etc) constructed within this setback area may be subject to lateral movement and/or differential settlement Foundations should be deepened as needed to attain an embedment below 1 1 plane from adjacent utility trenches If segmental walls are utilized, granular soils with a <|>=320 should be provided for wall backfill Wall designs should include a wall profile that shows all blocks and their relation to planned geognd Wall design should conform to current NCMA Guidelines The recommendations contained in this report are preliminary recommendations and should be verified at the completion of site grading If you have any questions regarding this update letter, please contact this office We appreciate this opportunity to be of service Respectfully submitted, LEIGHTON AND ASSOCIATES, INC MikeD Jensen, CEG 2457 Project Geologist Distribution Sean Colorado, GE 2507 Director of Engineering (1) Addressee (1) J R Miller & Associates, Inc , Attn Mr James Yost -3-Leighton Leighton and Associates, inc A LEIGHTON GROUP COMPANY October 26, 2007 Project No 960151-026 To Lcgoland California One Lego Drive Carlsbad, California 92008 Attention Mr Chris Romero Subject Grading Recommendations and Geotechnical Review of Grading and Foundation Plans for Proposed Seahfe Center, Legoland Theme Park, Carlsbad, California Introduction In accordance with your request and authorization, this report has been prepared to provide grading recommendations and to provide foundation plan review relative to the proposed Seahfe Center located at Legoland California in grading and Carlsbad, California Proposed Development Based on our review of the (JRM&A, 2007a) grading plans and foundation plans (JRM&A, 2007b), we understand the Seahfe Center improvements will include the construction of the Sealife Center, retaining walls, landscaping, sidewalks and utilities The proposed structures have a slab- on-grade with spread footings, or be supported on mat foundations Findings and Conclusions In October 2007, a representative of Leighton and Associates performed a site visit to observe the existing geotechmcal conditions of the site Based on our site visit and review of the project as- graded geotechmcal report (Leighton, 1998, the following items were noted " The location of the proposed structures and improvements appears to consist of an undocumented of fill and topsoil (that are both associated with utilities and landscaping grading activities) winch are underlain by sandy Quaternary-aged terrace deposits 3934 Murphy Canyon Road, Suite B205 » San Diego, CA 92123-4425 858.292.8030^ Fax 858 292,0771 • www leightongeo com 960151-026 • The anticipated grade differences across the proposed improvements appear to be less than 10 feet Minor grading will be required to construct the proposed improvements • Based on our professional experience on sites in the general vicinity, our review of the project As-graded report (Leighton, 1998) and the investigation for the adjacent Dmo Coaster (Leighton, 2004), the on-site soils possess a very low to low expansion potential and a negligible soluble sulfate content Laboratory testing upon completion of fine grading operations for the Seahfe pad is recommended to determine actual expansion potential of finish grade soil at the site • Ground water was not encountered during the investigation of the adjacent Dmo Coaster nor was any observed during our current evaluation If seepage conditions are encountered during site grading, recommendations will be made so that ground water does not impact site development In conclusion, it is our opinion that the Seahfe Center site located at Legoland Theme Park, California is suitable intended use provided the recommendations presented herein are incorporated into the design and construction of the proposed improvements Recommendations The following recommendations should be followed during the design and construction* of the proposed improvements We anticipate that earthwork on the site will consist of demolition and removal of the existing improvements in preparation for construction of the proposed Seahfe Center and associated improvements We recommend that earthwork on the site be performed in accordance with the following recommendations, the City of Carlsbad grading requirements, and the General Earthwork and Grading Specifications of Rough-Grading included m Appendix B In case of conflict, the following recommendations shall supersede those in Appendix B 1) Site Preparation We recommend that in the areas of proposed development the surficial soils be removed to a minimum depth of 12 inches, moisture-conditioned to optimum or above moisture content and' compacted to a minimum 90 percent relative compaction (based on ASTM Test Method D1557) The areas to receive structural fill or engineered structures should be cleared of subsurface obstructions, potentially compressible material (such as loose landscaping soils and undocumented fill) and stripped of vegetation prior to grading Vegetation and debris should be removed and properly disposed of offsite Holes resulting form removal of buried obstructions that extend below finish site grades should be replaced with suitable compacted fill material Areas to receive fill and/or other surface improvements should be scanfiecHo a minimum depth of 12 inches, brought to optimum or above optimum moisture condition, and -2- Letgmon 960151-026 recompacted to at least 90 percent relative compaction (based on ASTM Test Method D1557) 2) Excavations Excavations of the on-site materials may generally be accomplished with conventional heavy- duty earthwork equipment It is not anticipated that blasting will be required, or that significant quantities of oversized rock (i e , rock with maximum dimensions greater than 6 inches) will be generated during future grading However, if oversized rock is encountered, it should be hauled offsite, or placed in non-structural or landscape areas Excavation of utility trenches should be performed in accordance with the project plans, specifications and all applicable OSHA requirements The contractor should be responsible for providing the "competent person" required by OSHA standards Contractors should be advised that sandy soils and/or adversely oriented bedrock structures can make excavations particularly unsafe if not all safety precautions are taken. Spoil piles due to the excavation and construction equipment should be kept away from and on the down slope side of the trench 3) Fill Placement and Compaction The on-site soils are generally suitable for use as compacted fill provided they are free of organic material, debris, and rock fragments larger than 6 inches in maximum dimension All fill soils should be brought to optimum or above optimum moisture conditions and compacted in uniform lifts to at least 90 percent relative compaction based on the laboratory maximum dry density (ASTM Test Method D1557) Where footings will be supported, retaining wall backfill (e g mat adjacent to LSS tank retaining wall), that backfill should be compacted to 95 percent relative compaction The optimum lift thickness required to produce a uniformly compacted fill will depend on the type and size of compaction equipment used In general, fill should be placed in lifts not exceeding 4 to 8 inches in compacted thickness Placement and compaction of fill should be performed in general accordance with the current City of Carlsbad grading ordinances, sound construction practices, and the General Earthwork and Grading Specifications of Rough-Grading presented in Appendix B 4) Removal of Unsuitable Soils All unsuitable soils including undocumented fill soils, topsoil, and Weathered Terrace Deposits should be removed before placement of additional till or surficial improvements ^Removals made in these areas should extend to competent Terrace Deposits or documented fill. The existing fills that are present above the mass graded elevations (Leighton, 1998) should be removed and recompacted prior to placement of additional fills The estimated removal depth of the unsuitable soils ranges from approximately 1 to 10 feet After the fill soils are placed, a -3- Leighton 960151-026 standard conventional foundation system can be constructed Removal and relocation of the existing underground utility lines is anticipated where the lines will be located beneath the proposed structure 5) Seahfe Center Overexcavation From review of the site plan (JRM&A, 2007a and 2007b), cuts and fills are anticipated to fine grade the building pad footprint areas We recommend the Seahfe Center pad areas be overexcavated to an elevation of 349 (mean sea level) Where attainable, overexcavations should laterally extend at least 3 feet beyond the limits of the building slab 6) Cut Slopes Based on review of the current site plan (JRM&A, 2007), proposed cut slopes are anticipated along the east-west trending berm in southwestern portion of the site The proposed 'cut slope is expected to be on the order of approximately 8 feet in height The 2 1 (horizontal to vertical) cut slopes are anticipated to expose undocumented fill soils We -recommend geotechmcal consultant geologically map cut slopes during grading to substantiate geologic conditions and competency of undocumented fill Additional investigation and stability analysis may be required if unanticipated or adverse conditions are encountered during site grading 7) Slab Subgrade Moisture Conditioning The slab subgrade soils underlying the conventional foundation system should be presoaked in accordance with the recommendations presented in Table 1 prior to placement of the moisture barrier and slab concrete The subgrade soil moisture content should be checked by a representative of Leighton and Associates prior to slab construction Table 1 Presoaking Recommendations Based on Finish Grade Soil Expansion Potential Expansion Potential (CBC 18-I-B) Very Low to Low Presoaking Recommendations Optimum moisture content to a depth of at least 12 inches -4- >Leighton 960151-026 8) Cement Type for Construction Concrete in direct contact with soil or water that contains a high concentration of soluble sulfates can be subject to chemical deterioration commonly known as "sulfate attack" We anticipate that the on-site soils should possess a negligible potential to attack normal concrete As a result, the onsite concrete design mix can be designed for a negligible potential of sulfate attack and follow the recommendations presented in Table 19-A-4 of the 2001 edition of the CBC Laboratory testing of the actual finish grade soils on the lot upon completion of the grading operations should be performed to confirm the sulfate attack potential 9) Concrete Flatwork In order to reduce the potential for differential movement or cracking of driveways, sidewalks, patios, other concrete flatwork, 6x6-6/6 welded-wire mesh reinforcement or No 3 rebar on 18 inch centers, each way, is suggested along with keeping pad grade soils at an elevated moisture content Additional control can be obtained by providing thickened' edges and 4 or 6 inches of granular base or clean sand, respectively, below the flatwork Reinforcement should be placed midheight in concrete Even though the slabs are reinforced, some expansive-soil- related movement (i e, both horizontal to vertical differential movement, etc) should be anticipated due to the nature of the expansive soils A uniform moisture content on the site should be maintained throughout the year to reduce differential heave of flatwork such as sidewalks, flatwork, etc 10) Control of Surface Water and Drainage Control Positive drainage of surface water away from structures is-very important No water should be allowed to pond adjacent to buildings Positive drainage may be accomplished by providing drainage away from buildings at a gradient of at least 2 percent for a distance of at least 5 feet, and further maintained by a swale or drainage path at a gradient of at least 1 percent Have gutters, with properly connected downspouts to appropriate outlets, are recommended to reduce water infiltration into the subgrade soils 1) Construction Observation and Testing and Plan Review The geotechnical consultant should perform construction observation and testing during the grading operations, future excavations, and foundation or retaining wall construction at the site Additionally, footing excavations should be observed and moisture determination tests of the slab subgrade soils should be performed by the geotechnical consultant prior to the-pounng of -5- 960151-026 concrete Retaining wall calculations for keystone wall design should be reviewed by geolechnical consultant prior to construction Grading and Foundation Plan Review As part of our update evaluation we have reviewed the grading plans and the foundation plans prepared by J R Miller and Associates (JRMA&A, 2007a and 2007b) Based-on oun review of these plans and project geotechnical report (Leighton, 1998 and 2007),. the -plans''have been prepared in general accordance with the project geotechnical recommendations with the exceptions of the following comments • Sheet No CO 2, Grading Notes 36 should replace referenced report with this document and referenced Preliminary Geotechnical Design Recommendations, Proposed Sealife Center, dated July 25 (revised October 25, 2007) • Sheet No C3 2. Detail F Retaining walls should have a subdram per Appendix B • Sheet C3 2, Detail E Segmental walls should be designed in accordance with NCMA Guidelines Recommendations we provided in the Preliminary Geotechnical Recommendation Letter (Leighton, 2007) • Sheet SI 1, Foundations should reference Report No 960151-026, dated July 25, 2007, revised October 26, 2007, Allowable Bearing Pressure should be 3,000 psf • Sheet SI 1, Foundations The current version of ASTM D1557 is dated 2002, not 1994 • Sheet SI 1, Design Loads Near Source Factor Nv should read 1 1 and not 1 0 (Leighton, 2007) • Sheet S2 1, The LSS tank wall should be designed for surcharge from the adjacent mat foundation (Reference Column Line E between 3 and 4) • Sheet SD2 5, Reservoir Tank, Detail 5 The detail^should have a subdram behind wall per Appendix B Limitations The conclusions and recommendations in this report are based in part upon data that were obtained from a limited number of observations, site visits, excavations, samples, and/or tests. Such information is by necessity incomplete The nature of many sites is such that differing geotechnical or geological conditions can occur within small distances and under varying climatic conditions Changes in subsurface conditions can and do occur over time Therefore, the -6- Leighton 960151-026 APPENDIX A REFERENCES Leighton and Associates, Inc , 1995, Preliminary Geotechnical Investigation, Lego Family Park and Pointe Resorts, Lots 17 and 18 of the Carlsbad Ranch, Carlsbad, California, Project No 950294-001, dated October 5, 1998 —• , 1996, Supplemental Geotechnical Investigation, Lego Family Park, Carlsbad, Ranch, Carlsbad, California, Project No 960151-001, dated July 23, 1996 , 1998, Final As-Graded Report of Rough-Grading, LEGO Family Park, Carlsbad, California, Project No 960151-003, dated February 10, 1998 , 2004, Geotechnical Investigation, Proposed Dmo Island Attraction, Legoland Theme Park, Carlsbad, California, Project No 960151-021, dated February 23, 2004 , 2007, Update Preliminary Geotechnical Design Recommendations, Proposed Seahfe Center, Legoland California, Carlsbad, Project No 960151-026, dated July 25, 2007, revised October 26, 2007 J R Miller & Associates, Inc , 2007a, Seahfe Center, Sheets CO 1, CO 2, Cl 1, Cl 2, C2 1, C3 2, dated September 24,2007 , 2007b, Seahfe Center, Sheets, SI 1, S2 1, SD1 4, SD1 2, SD1 3, SD1 4, and SD1 5, dated August 16,2007 A-l Leighlon and Associates, Inc GENERAL EARTHWORK AND GRADING SPECIFICATIONS Page 1 of6 LEIGHTON AND ASSOCIATES, INC GENERAL EARTHWORK AND GRADING SPECIFICATIONS FOR ROUGH GRADING 1 0 General 1 1 Intent These General Earthwork and Grading Specifications are for the grading and earthwork shown on the approved grading plan(s) and/or indicated in the geotechnical report(s) These Specifications are a part of the recommendations contained in the geotechnical report(s) In case of conflict, the specific recommendations in the geotechnical report shall supersede these more general Specifications Observations of the earthwork by the project Geotechnical Consultant during the course of grading may result in new or revised recommendations that could supersede these specifications or the recommendations in the geotechnical report(s) 1 2 The Geotechnical Consultant of Record Prior to commencement of work, the owner shall employ the Geotechnical Consultant of Record (Geotechnical Consultant) The Geotechnical Consultants shall be responsible for reviewing the approved geotechnical report(s) and accepting the adequacy of the preliminary geotechnical findings, conclusions, and recommendations prior to the commencement of the grading Prior to commencement of grading, the Geotechnical Consultant shall review the "work plan" prepared by the Earthwork Contractor (Contractor) and schedule sufficient personnel to perform the appropriate level of observation, mapping, and compaction testing During the grading and earthwork operations, the Geotechnical Consultant shall observe, map, and document the subsurface exposures to verify the geotechnical design assumptions If the observed conditions are found to be significantly different than the interpreted assumptions during the design phase, the Geotechnical Consultant shall inform the owner, recommend appropriate changes in design to accommodate the observed conditions, and notify the review agency where required Subsurface areas to be geotechmcally observed, mapped, elevations recorded, and/or tested include natural ground after it has been cleared for receiving fill but before fill is placed, bottoms of all "remedial removal" areas, all key bottoms, and benches made on sloping ground to receive fill The Geotechnical Consultant shall observe the moisture-conditioning and processing of the subgrade and fill materials and perform relative compaction testing of fill to determine the attained level of compaction The Geotechnical Consultant shall provide the test results to the owner and the Contractor on a routine and frequent basis 3030 1094 Leighton and Associates, Inc GENERAL EARTHWORK AND GRADING SPECIFICATIONS Page 2 of6 1 3 The Earthwork Contractor The Earthwork Contractor (Contractor) shall be qualified, experienced, and knowledgeable in earthwork logistics, preparation and processing of ground to receive fill, moisture-conditioning and processing of fill, and compacting fill The Contractor shall review and accept the plans, geotechmcal report(s), and these Specifications prior to commencement of grading The Contractor shall be solely responsible for performing the grading in accordance with the plans and specifications The Contractor shall prepare and submit to the owner and the Geotechmcal Consultant a work plan that indicates the sequence of earthwork grading, the number of "spreads" of work and the estimated quantities of daily earthwork contemplated for the site prior to commencement of grading The Contractor shall inform the owner and the Geotechmcal Consultant of changes in work schedules and updates to the work plan at least 24 hours in advance of such changes so that appropriate observations and tests can be planned and accomplished The Contractor shall not assume that the Geotechmcal Consultant is aware of all grading operations The Contractor shall have the sole responsibility to provide adequate equipment and methods to accomplish the earthwork in accordance with the applicable grading codes and agency ordinances, these Specifications, and the recommendations in the approved geotechmcal report(s) and grading plan(s) If, in the opinion of the Geotechmcal Consultant, unsatisfactory conditions, such as unsuitable soil, improper moisture condition, inadequate compaction, insufficient buttress key size, adverse weather, etc, are resulting in a quality of work less than required in these specifications, the Geotechmcal Consultant shall reject the work and may recommend to the owner that construction be stopped until the conditions are rectified 2 0 Preparation of Areas to be Filled 2 1 Clearing and Grubbing Vegetation, such as brush, grass, roots, and other deleterious material shall be sufficiently removed and properly disposed of in a method acceptable to the owner, governing agencies, and the Geotechmcal Consultant The Geotechmcal Consultant shall evaluate the extent of these removals depending on specific site conditions Earth fill material shall not contain more than 1 percent of organic materials (by volume) No fill lift shall contain more than 5 percent of organic matter Nesting of the organic materials shall not be allowed If potentially hazardous materials are encountered, the Contractor shall stop work in the affected area, and a hazardous material specialist shall be informed immediately for proper evaluation and handling of these materials prior to continuing to work in that area As presently defined by the State of California, most refined petroleum products (gasoline, diesel fuel, motor oil, grease, coolant, etc ) have chemical constituents that are considered to be hazardous waste As such, the indiscriminate dumping or spillage of these fluids onto the ground may constitute a misdemeanor, punishable by fines and/or imprisonment, and shall not be allowed 3030 1094 Leighton and Associates, Inc GENERAL EARTHWORK AND GRADING SPECIFICATIONS Page 3 of6 2 2 Processing Existing ground that has been declared satisfactory for support of fill by the Geotechmcal Consultant shall be scarified to a minimum depth of 6 inches Existing ground that is not satisfactory shall be overexcavated as specified in the following section Scarification shall continue until soils are broken down and free of large clay lumps or clods and the working surface is reasonably uniform, flat, and free of uneven features that would inhibit uniform compaction 2 3 Overexcavation In addition to removals and overexcavations recommended in the approved geotechmcal report(s) and the grading plan, soft, loose, dry, saturated, spongy, organic-rich, highly fractured or otherwise unsuitable ground shall be overexcavated to competent ground as evaluated by the Geotechmcal Consultant during grading 2 4 Benching Where fills are to be placed on ground with slopes steeper than 5 1 (horizontal to vertical units), the ground shall be stepped or benched Please see the Standard Details for a graphic illustration The lowest bench or key shall be a minimum of 15 feet wide and at least 2 feet deep, into competent material as evaluated by the Geotechmcal Consultant Other benches shall be excavated a minimum height of 4 feet into competent material or as otherwise recommended by the Geotechmcal Consultant Fill placed on ground sloping flatter than 5 1 shall also be benched or otherwise overexcavated to provide a flat subgrade for the fill 2 5 Evaluation/Acceptance of Fill Areas All areas to receive fill, including removal and processed areas, key bottoms, and benches, shall be observed, mapped, elevations recorded, and/or tested prior to being accepted by the Geotechmcal Consultant as suitable to receive fill The Contractor shall obtain a written acceptance from the Geotechmcal Consultant prior to fill placement A licensed surveyor shall provide the survey control for determining elevations of processed areas, keys, and benches 30 Fill Material 3 1 General Material to be used as fill shall be essentially free of organic matter and other deleterious substances evaluated and accepted by the Geotechmcal Consultant prior to placement Soils of poor quality, such as those with unacceptable gradation, high expansion potential, or low strength shall be placed in areas acceptable to the Geotechmcal Consultant or mixed with other soils to achieve satisfactory fill material 3 2 Oversize Oversize material defined as rock, or other irreducible material with a maximum dimension greater than 8 inches, shall not be buried or placed in fill unless location, materials, and placement methods are specifically accepted by the Geotechmcal Consultant Placement operations shall be such that nesting of oversized material does not occur and such that oversize material is completely surrounded by compacted or densified fill Oversize material shall not be placed within 10 vertical feet of finish grade or within 2 feet of future utilities or underground construction 3030 1094 Leighlon and Associates, Inc GENERAL EARTHWORK AND GRADING SPECIFICATIONS Page 4 of6 3 3 Import If importing of fill material is required for grading, proposed import material shall meet the requirements of Section 3 1 The potential import source shall be given to the Geotechmcal Consultant at least 48 hours (2 working days) before importing begins so that its suitability can be determined and appropriate tests performed 4 0 Fill Placement and Compaction ' 4 1 Fill Layers Approved fill material shall be placed in areas prepared to receive fill (per Section 3 0) in near-horizontal layers not exceeding 8 inches in loose thickness The Geotechmcal Consultant may accept thicker layers if testing indicates the grading procedures can adequately compact the thicker layers Each layer shall be spread evenly and mixed thoroughly to attain relative uniformity of material and moisture throughout 4 2 Fill Moisture Conditioning Fill soils shall be watered, dried back, blended, and/or mixed, as necessary to attain a relatively uniform moisture content at or slightly over optimum Maximum density and optimum soil moisture content tests shall be performed in accordance with the American Society of Testing and Materials (ASTM Test Method D1557-91) 4 3 Compaction of Fill After each layer has been moisture-conditioned, mixed, and evenly spread, it shall be uniformly compacted to not less than 90 percent of maximum dry density (ASTM Test Method D1557-91) Compaction equipment shall be adequately sized and be either specifically designed for soil compaction or of proven reliability to efficiently achieve the specified level of compaction with uniformity 4 4 Compaction of Fill Slopes In addition to normal compaction procedures specified above, compaction of slopes shall be accomplished by backrollmg of slopes with sheepsfoot rollers at increments of 3 to 4 feet in fill elevation, or by other methods producing satisfactory results acceptable to the Geotechmcal Consultant. Upon completion of grading, relative compaction of the fill, out to the slope face, shall be at least 90 percent of maximum density per ASTM Test Method D1557-91 4 5 Compaction Testing Field tests for moisture content and relative compaction of the fill soils shall be performed by the Geotechmcal Consultant Location and frequency of tests shall be at the Consultant's discretion based on field conditions encountered Compaction test locations will not necessarily be selected on a random basis Test locations shall be selected to verify adequacy of compaction levels in areas that are judged to be prone to inadequate compaction (such as close to slope faces and at the fill/bedrock benches) 4 6 Frequency of Compaction Testing Tests shall be taken at intervals not exceeding 2 feet in vertical rise and/or 1,000 cubic yards of compacted fill soils embankment In addition, as a guideline, at least one test shall be taken on slope faces for each 5,000 square feet of slope face and/or each 10 feet of vertical height of slope The Contractor shall assure that fill construction is such that the testing schedule can be accomplished by the Geotechmcal Consultant The Contractor shall stop or slow down the earthwork construction if these minimum standards are not met 3030 1094 Leighton and Associates, Inc GENERAL EARTHWORK AND GRADING SPECIFICATIONS Page 5 of6 4 7 Compaction Test Locations The Geotechnical Consultant shall document the approximate elevation and horizontal coordinates of each test location The Contractor shall coordinate with the project surveyor to assure that sufficient grade stakes are established so that the Geotechnical Consultant can determine the test locations with sufficient accuracy At a minimum, two grade stakes within a horizontal distance of 100 feet and vertically less than 5 feet apart from potential test locations shall be provided 5 0 Subdram Installation Subdram systems shall be installed in accordance with the approved geotechmcal report(s), the grading plan, and the Standard Details The Geotechnical Consultant may recommend additional subdrams and/or changes in subdram extent, location, grade, or material depending on conditions encountered during grading All subdrams shall be surveyed by a land surveyor/civil engineer for line and grade after installation and prior to burial Sufficient time should be allowed by the Contractor for these surveys 6 0 Excavation Excavations, as well as over-excavation for remedial purposes, shall be evaluated by the Geotechnical Consultant during grading Remedial removal depths shown on geotechmcal plans are estimates only The actual extent of removal shall be determined by the Geotechnical Consultant based on the field evaluation of exposed conditions during grading Where fill-over-cut slopes are to be graded, the cut portion of the slope shall be made, evaluated, and accepted by the Geotechnical Consultant prior to placement of materials for construction of the fill portion of the slope, unless otherwise recommended by the Geotechnical Consultant 3030 1094 Leigliton and Associates, Inc GENERAL EARTHWORK AND GRADING SPECIFICATIONS Page 6 of 6 7 0 Trench Backfills 7 1 The Contractor shall follow all OHSA and Cal/OSHA requirements for safety of trench excavations 7 2 All bedding and backfill of utility trenches shall be done in accordance with the applicable provisions of Standard Specifications of Public Works Construction Bedding material shall have a Sand Equivalent greater than 30 (SE>30) The bedding shall be placed to 1 foot over the top of the conduit and densified by jetting Backfill shall be placed and densified to a minimum of 90 percent of maximum from 1 foot above the top of the conduit to the surface 7 3 The jetting of the bedding around the conduits shall be observed by the Geotechmcal Consultant 7 4 The Geotechmcal Consultant shall test the trench backfill for relative compaction At least one test should be made for every 300 feet of trench and 2 feet of fill 7 5 Lift thickness of trench backfill shall not exceed those allowed in the Standard Specifications of Public Works Construction unless the Contractor can demonstrate to the Geotechmcal Consultant that the fill lift can be compacted to the minimum relative compaction by his alternative equipment and method 3030 1094 FILL SLOPE PROJECTED PLANE 1 TO 1 MAXIMUM FROM TOE OF SLOPE TO APPROVED GROUND COMPACTED: EXISTING GROUND SURFACE BENCH HEIGHT (4' TYPICAL) REMOVE UNSUITABLE MATERIAL 2 MIN KEY DEPTH LOWEST BENCH (KEY) FILL-OVER-CUT SLOPE EXISTING GROUND SURFACE HEIGHT (41 TYPICAL) REMOVE UNSUITABLE MATERIAL CUT-OVER-FILL SLOPE -CUT FACE SHALL BE CONSTRUCTED PRIOR TO FILL PLACEMENT TO ASSURE ADEQUATE GEOLOGIC CONDITIONS EXISTING- GROUND SURFACE OVERBUILD AND TRIM BACK PROJECTED PLANE 1 TO 1 MAXIMUM FROM TOE OF SLOPE TO APPROVED GROUND :UT FACE SHALL BE CONSTRUCTED PRIOR TO FILL PLACEMENT REMOVE UNSUITABLE MATERIAL LBENCH HEIGHT (41 TYPICAL) FOR SUBDRAINS SEE STANDARD DETAIL C 2' MIN—1 KEY DEPTH LOWEST BENCH (KEY) BENCHING SHALL BE DONE WHEN SLOPE'S ANGLE IS EQUAL TO OR GREATER THAN 5 1 MINIMUM BENCH HEIGHT SHALL BE 4 FEET AND MINIMUM FILL WIDTH SHALL BE 9 FEET KEYING AND BENCHING GENERAL EARTHWORK AND GRADING SPECIFICATIONS STANDARD DETAILS A FINISH GRADE SLOPE FACE * OVERSIZE ROCK IS LARGER THAN 8 INCHES IN LARGEST DIMENSION * EXCAVATE A TRENCH IN THE COMPACTED FILL DEEP ENOUGH TO BURY ALL THE ROCK ' BACKFILL WITH GRANULAR SOIL JETTED OR FLOODED IN PLACE TO FILL ALL THE VOIDS * DO NOT BURY ROCK WITHIN 10 FEET OF FINISH GRADE * WINDROW OF BURIED ROCK SHALL BE PARALLEL TO THE FINISHED SLOPE GRANULAR MATERIAL TO BE' DENSIFIED IN PLACE BY FLOODING OR JETTING DETAIL ^-JETTED OR FLOODED GRANULAR MATERIAL TYPICAL PROFILE ALONG WINDROW OVERSIZE ROCK DISPOSAL GENERAL EARTHWORK AND GRADING SPECIFICATIONS STANDARD DETAILS B EXISTING GROUND SURFACE BENCHING REMOVE UNSUITABLE MATERIAL SUBDRAIN TRENCH SEE DETAIL BELOW CALTRANS CLASS 2 PERMEABLE OR #2 ROCK (9FT~3/FT) WRAPPED IN FILTER FABRIC FILTER FABRIC (MIRAFI 140N OR APPROVED EQUIVALENT)* WIN BEDDING COLLECTOR PIPE SHALL BE MINIMUM 6" DIAMETER SCHEDULE 40 PVC PERFORATED PIPE SEE STANDARD DETAIL D FOR PIPE SPECIFICATIONS SUBDRAIN DETAIL DESIGN FINISH GRADE NONPERFORATED 6"0 MIN PERFORATED 6' 0MIN PIPE FILTER FABRIC (MIRAFI 140N OR APPROVED EQUIVALENT) CALTRANS CLASS 2 PERMEABLE OR #2 ROCK (9FT"3/FT) WRAPPED IN FILTER FABRIC DETAIL OF CANYON SUBDRAIN OUTLET CANYON SUBDRAINS GENERAL EARTHWORK AND GRADING SPECIFICATIONS STANDARD DETAILS C 15 WIN OUTLET PIPES 4 0 NONPERFORATEO PIPE. 100' MAX OC HORIZONTALLY. 30 MAX 0 C VERTICALLY BACK CUT 1 1 OR FLATTER •SEE SUBDRAIN TRENCH DETAIL LOWEST SUBDRAIN SHOULD BE SITUATED AS LOW AS POSSIBLE TO ALLOW SUITABLE OUTLET [±} \ .MMmm^S^^^^i x^^i^~~--^~=y?7?^3: -TsauiHETTif^:::::;:;:i^ -KEY DEPTH (2' MIN ) KEY WIDTH AS NOTED ON GRADING PLANS (15' MIN )12' MIN OVERLAP — FROM THE TOP HOG RING TIED EVERY 6 FEET CALTRANS CLASS II PERMEABLE OR #2 ROCK (3 FT~3/FT) WRAPPED IN FILTER FABRIC -4" 0 NON-PERFORATED OUTLET PIPE PROVIDE POSITIVE SEAL AT THE JOINT T-CONNECTION FOR COLLECTOR PIPE TO OUTLET PIPE 6' MIN COVER 4' 0 PERFORATED PIPE FILTER FABRIC ENVELOPE (MIRAFI 140 OR APPROVED EQUIVALENT) -4 MIN BEDDING SUBDRAIN TRENCH DETAIL SUBDRAIN INSTALLATION - subdroin collector pipe sholl be installed with perforation down or unless otherwise designated by the geotechnicol consultant Outlet pipes shall be non-perforoted pipe The subdroin pipe shall hove ot least 8 perforations uniformly spaced per foot Perforation shall be 1/4" to 1/2 if drill holes ore used All subdroin pipes sholl have a gradient of ot least 27, towards the outlet SUBDRAIN PIPE - Subdroin pipe shall be ASTM D2751. SDR 235 or ASTM D1527. Schedule 40. or ASTM D3034. SDR 235 Schedule 40 Polyvmyl Chloride Plastic (PVC) pipe All outlet pipe shall be placed in a trench no wide thon twice the subdrain pipe Pipe shall be m soil of SE >/=30 jetted or flooded in place except for the outside 5 feet which shall be native soil backfill BUTTRESS OR REPLACEMENT FILL SUBDRAINS GENERAL EARTHWORK AND GRADING SPECIFICATIONS STANDARD DETAILS D SOIL BACKFILL. COMPACTED TO 90 PERCENT RELATIVE COMPACTION BASED ON ASTM 01557 RETAINING WALL— -^ fALL WATERPROOFING — — ER ARCHITECT'S ^"\ PECIFICATIONS \ FINISH GRADE •— ^ "-"-"-"-"-"-"-"-"-"- "-"-"-COMP ACTED FILL. """ """" — ~" \ ^mm n^Trp • 6" WIN ' ' OVERLAP o • »' I o ° -o '•• °°o | 1 WIN I o • o • -Vrj o . • h°;x i^YrV-Joj0 o*— X — L. ,l_ — d •:-:-: 32" f YP :-:-:-:->- I-.-.-.-.-:-: FILTER FABRIC ENVELOPE -~-~-~y*^*~~~~(M\Rff\ 140N OR APPROVED ~-^i EQUIVALENT)*' -"-"-"-" ^/4" TO 1 1/9" PI FAN HRA <-:<- -4" (MIN ) DIAMETER PERFOR/ ---^'^ PVC PIPE (SCHEDULE 40 OR -:-:-:-: EQUIVALENT) WITH PERFORAI ~^>. ORIENTED DOWN AS DEPICTE -:-:-:-: MINIMUM i PERCENT GRADiEh -:-:-:-: TO SUITABLE OUTLET ^^ 3' MIN WALL FOOTING COMPETENT BEDROCK OR MATERIAL AS EVALUATED BY THE GEOTECHNICAL CONSULTANT NOTE UPON REVIEW BY THE GEOTECHNICAL CONSULTANT. COMPOSITE DRAINAGE PRODUCTS SUCH AS MIRADRAIN OR J-DRAIN MAY BE USED AS AN ALTERNATIVE TO GRAVEL OR CLASS 2 PERMEABLE MATERIAL INSTALLATION SHOULD BE PERFORMED IN ACCORDANCE WITH MANUFACTURER'S SPECIFICATIONS RETAINING WALL DRAINAGE DETAIL GENERAL EARTHWORK AND GRADING SPECIFICATIONS STANDARD DETAILS E