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1881 EAST POINTE AVE; ; CBR2023-3526; Permit
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lan Check Est. Value PC Deposit Date Job Address Unit: APN: CT/Project #: Lot #: Year Built: BRIEF DESCRIPTION OF WORK: PROPERTY OWNER Name: Address: State: Zip: City: State: Zip: Phone: APPLICANT;WZ/DZzKEddͿ Name: Address: City: Phone: Email: Email: DESIGN PROFESSIONAL CONTRACTOR OF RECORD Name: Business Name: Address: City: State: Zip: Phone: Email: Architect StateLicense: Address: City: State: Zip: Phone: Email: CSLBLicense #: Class: Carlsbad Business License # (Required): APPLICANT CERTIFICATION: I certify that I have read the application and state that the above information is correct and that the information of the plans is accurate. I agree to comply with all City ordinances and State laws relating to building construction. NAME (PRINT): DATE: 1635 Faraday Ave Carlsbad,CA 92008 SIGN: Ph:ϰϰϮͲϯϯϵ-2719 Email:Building@carlsbadca.gov 1 REV. New SF : Living SF, _ Deck SF, Patio SF, Garage SF Is this to create an Accessory Dwelling Unit? Y N New Fireplace? Y N , if yes how many? _________ Solar:KW, Modules,Mounted: Roof Ground, Tilt: Y N, RMA: Y N, Battery: Y N, Panel Upgrade: Y N Other: Additional Gas or ElectricalFeatures?AddiPool/Spa:SF Is the area a conversion or change ofuse? Y N Remodel:SF of affectedarea ůĞĐƚƌŝĐDĞƚĞƌŶƵŵďĞƌ͗ͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ 1881 EAST POINTE AVE 207-383-08-00 8 1985 1) PROPOSED POOL/SPA 290ft² 5' MAX DEPTH 2) PROPOSED CITY STANDARD RETAINING WALL: 116LF 5'-4"' MAX HEIGHT 290 N RETAINING WALL 116LF JENNIFER RASMUSSEN BALLARD RESIDENCE 6469 PANEL CT 1881 EAST POINTE AVE SAN DIEGO CA 92122 CARLSBAD CA 92008 (619) 729-1198 INFO@SWIFT-PERMITS.COM CUSTOM CREATIONS WEST INC 630 Alta Vista Dr. STE 203 VISTA CA 92084 (760) 451-8912 MMEAD@CUSTOMCREATIONSWEST.COM 1066828 B, C53 07/18/2023JENNIFER RASMUSSEN THIS PAGE REQUIRED AT PERMIT ISSUANCE PLAN CHECK NUMBER: __________________ A BUILDING PERMIT CAN BE ISSUED TO EITHER A STATE LICENSED CONTRACTOR OR A PROPERTY OWNER. IF THE PERSON SIGNING THIS FORM IS AN AGENT FOR EITHER ENTITY AN AUTHORIZATION FORM OR LETTER IS REQUIRED PRIOR TO PERMIT ISSUANCE. (OPTION A): LICENSED CONTRACTOR DECLARATION: I herebyaffirmunderpenaltyofperjurythat I amlicensedunderprovisionsofChapter 9 (commencingwithSection7000)ofDivision3 oftheBusinessandProfessionsCode,andmylicenseisin full forceand effect. I alsoaffirmunderpenaltyofperjuryoneofthe following declarations (CHOOSE ONE): I have and will maintain a certificate of consent to self-insure for workers’ compensation provided by Section 3700 of the Labor Code, for the performance of the work which this permit is issued. PolicyNo. -OR- I have and will maintain worker’s compensation, as required by Section 3700 of the Labor Code, for the performance of the work for which this permit is issued. Myworkers’ compensation insurance carrierand policynumberare:InsuranceCompany Name: Policy No. _____________________________________________________________ Expiration Date: -OR- 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 $100,000.00, in addition the to the cost of compensation, damages as provided for in Section 3706 of the Labor Code, interest and attorney’s fees. CONSTRUCTION LENDING AGENCY, IF ANY: 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). Lender’s Name: Lender’s Address: CONTRACTOR CERTIFICATION: The applicant certifies that all documents and plans clearly and accurately show all existing and proposed buildings, structures, access roads, and utilities/utility easements. All proposed modifications and/or additions are clearly labeled on the site plan. Any potentially existing detail within these plans inconsistent with the site plan are not approved for construction and may be required to be altered or removed. The city’s approval of the application is based on the premise that the submitted documents and plans show the correct dimensions of; the property, buildings, structures and their setbacks from property lines and from one another; access roads/easements, and utilities. The existing and proposed use of each building as stated is true and correct; all easements and other encumbrances to development have been accurately shown and labeled as well as all on-site grading/site preparation. All improvements existing on the property were completed in accordance with all regulations in existence at the time of their construction, unless otherwise noted. NAME (PRINT): SIGNATURE: DATE: Note: If the person signing above is an authorized agent for the contractor provide a letter of authorization on contractor letterhead. (OPTION B): OWNER-BUILDER DECLARATION: I hereby affirm that I am exempt from Contractor’s License Law for the following reason: 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, provided 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). -OR- 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 to an owner of property who builds or improves thereon, and contracts for such projects with contractor(s) licensed pursuant to the Contractor’s License Law). -OR- I am exempt under Business and Professions Code Division 3, Chapter 9, Article 3 for this reason: AND, FORM B-61 “Owner Builder Acknowledgement and Verification Form” is required for any permit issued to a property owner. By my signature below I acknowledge that, except for my personal residence in which I must have resided for at least one year prior to completion of the improvements covered by this permit, I cannot legally sell a structure that I have built as an owner-builder if it has not been constructed in its entirety by licensed contractors.I understandthat a copyoftheapplicablelaw,Section7044oftheBusinessandProfessionsCode,isavailableuponrequestwhenthisapplicationis submitted orat thefollowing Website: http://www.leginfo.ca.gov/calaw.html. OWNER CERTIFICATION: The applicant certifies that all documents and plans clearly and accurately show all existing and proposed buildings, structures, access roads, and utilities/utility easements. All proposed modifications and/or additions are clearly labeled on the site plan. Any potentially existing detail within these plans inconsistent with the site plan are not approved for construction and may be required to be altered or removed. The city’s approval of the application is based on the premise that the submitted documents and plans show the correct dimensions of; the property, buildings, structures and their setbacks from property lines and from one another; access roads/easements, and utilities. The existing and proposed use of each building as stated is true and correct; all easements and other encumbrances to development have been accurately shown and labeled as well as all on-site grading/site preparation. All improvements existing on the property were completed in accordance with all regulations in existence at the time of their construction, unless otherwise noted. NAME (PRINT): SIGN:DATE: Note: If the person signing above is an authorized agent for the property owner include form B-62 signed by property owner. 1635 Faraday Ave Carlsbad,CA 92008 Ph:ϰϰϮ-ϯϯϵ-2719 Email:Building@carlsbadca.gov 2 REV.ϬϰͬϮϮ -OR- ce at the time of their construction, unl tt f th i ti tt JENNIFER RASMUSSE 7/18/2023 ('cityof Carlsbad OWNER-BUILDER ACKNOWLEDGEMENT FORM B-61 Development Services Building Division 1635 Faraday Avenue 442-339-2719 www.carlsbadca.gov OWNER-BUILDER ACKNOWLEDGMENT FORM Pursuant to State of California Health and Safety Code Section 19825-19829 To: Property Owner An application for construction permit(s) has been submitted in your name listing you as the owner-builder of the property located at: Site Address I i (( I The City of Carlsbad ("City") is providing you with this Owner-Builder Acknowledgment and Verification form to inform you of the responsibilities and the possible risks associated with typical construction activities issued in your name as the Owner-Builder. The City will not issue a construction permit until you have read and initialed your understanding of each provision In the Property Owner Acknowledgment section below and sign the form. An agent of the owner cannot execute this notice unless you, the property owner, complete the Owner's Authorized Agent form and It Is accepted by the Qty of Carlsbad. INSTRUCTIONS: Please read and initial each statement below to acknowledge your understanding and verification of this information by signature at the bottom of the form. These are very Important construction related acknowledgments designed to inform the property owner of his/her obligations related to the requested permit activities. I. CB I understand a frequent practice of unlicensed contractors is to have the property owner obtain an "Owner• •Builder" building permit that erroneously implies that the property owner is providing his or her own labor and material personally. I, as an Owner-Builder, may be held liable and subject to serious financial risk for any Injuries sustained by an unlicensed contractor and his or her employees while working on my property. My homeowner's insurance may not provide coverage for those injuries. I am willfully acting as an Owner-Builder and am aware of the limits of my insurance coverage for Injuries to workers on my property. ii. ~I understand building permits are not required to be signed by property owners unless they are responsible for the construction and are not hiring a licensed contractor to assume this responsibility. Ill. C..6 I understand as an •owner-Builder'" I am the responsible party of record on the permit, I understand that I may protect myself from potential financial risk by hiring a licensed contractor and having the permit filed In his or her name instead of my own. IV. ~I understand contractors are required by law to be licensed and bonded In California and to list their llcense numbers on permits and contracts. V. ~I understand if I employ or otherwise engage any persons, other than California licensed contractors, and the total value of my construction is at least five hundred dollars ($500), Including labor and materials, I may be considered an "employer" under state and federal law. 1 REV.a!,/22 Scanned with Ca ·mScanner Owner-Builder Acknowledgement Continued VI. ~I understand if I am considered an "employer" under state and federal law, I must register with the state and federal government, withhold payroll taxes, provide workers' compensation disability insurance, and contribute to unemployment compensation for each "employee." I also understand my failure to abide by these laws may subject me to serious financial risk. VII. ffi I understand under California Contractors' State License Law, an Owner-Builder who builds single-family residential structures cannot legally build them with the intent to offer them for sale, unless all work is performed by licensed subcontractors and the number of structures does not exceed four within any calendar year, or all of the work is performed under contract with a licensed general building contractor. VIII. ~ I understand as an Owner-Builder if I sell the property for which this permit is issued, I may be held liable for any financial or personal Injuries sustained by any subsequent owner(s) which result from any latent construction defects In the workmanship or materials. IX. CB I understand I may obtain more information regarding my obligations as an "employer" from the Internal Revenue Service, the United States Small Business Administration, the California Department of Benefit Payments, and the California Division of Industrial Accidents. I also understand I may contact the California Contractors' State License Board (CSLB) at 1-800-321-CSLB (2752) or www.cslb.ca.gov for more information about licensed contractors. X. fil._1 am aware of and consent to an Owner-Builder building permit applied for in my name, and understand that I am the party legally and financially responsible for ,proposed construction activity at the following address: l<;:~1 e. fc,,~:b@... Av<'< (uy/sbo..J,) CA: 41.oos XI. -'=!l._1 agree that, as the party legally and financially responsible for this proposed construction activity, I will abide by all applicable laws and requirements that govern Owner-Builders as well as employers. XII. CE...1 agree to notify the issuer of this form immediately of any additions, deletions, or changes to any of the information I have provided on this form. Licensed contractors are regulated by laws designed to protect the public. If you contract with someone who does not have a license, the Contractor's State License Board may be unable to assist you with any financial loss you may sustain as a result of a complaint. Your only remedy against unlicensed Contractors may be in civil court. It Is also Important for you to understand that If an unlicensed Contractor or employee of that individual or firm is Injured while working on your property, you may be held liable for damages. If you obtain a permit as Owner- Builder and wish to hire contractors, you will be responsible for verifying whether or not those contractors are properly licensed and the status of their workers' compensation coverage. Befort! a building permit can be issued, this form must b~ completed, signed by the property owner and returned to the City of Carlsbad Building Division. I d«Jart1 under Pffla/ty of ~rJIIT'/ that I havtt rttid and underJtand all of the Information provlckd on this form and that my respons~. Including my authority to sign this form, Is true and corfffl. I am aware that I have the option to consult with legal counsel prior to signing this form. and I h~ dhef (t} consult«J with legal counsel prior to signing this f°"!J or (2) have waJv«J this right In signing this form without t:M advk:~ of 1tt9a/ counsel. Property Owner Name (PRINT) Property Owner Signature 3 REV.~/22 Scanned with CamScanner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ermit Number APN Address City/State/Zip The following document is missing from this file: B-1 B-10 B-15 This file was printed on: ______________________________________________________ CBR2023-3526 2073830800 1881 EAST POINTE AVE CARLSBAD, CA 92008-3773 True North Comments Missing 6/10/25 ✔ 23 February 2024 Mr. Chase Ballard Job No. 23-14471 1881 East Pointe Avenue Carlsbad, CA 92008 Subject: Response to City of Carlsbad Comments Ballard Pool 1881 East Pointe Avenue Carlsbad, California Dear Mr. Ballard: Per your request and as required by the City of Carlsbad reviewer, we are responding to the following comments presented in the geotechnical report review project ID- CRB2023-3526 dated February 12, 2024, for the site. Comment No. 1: Please provide the appropriate laboratory testing to substantiate the values for bearing capacity, passive pressure, coefficient of friction, and active/at- rest earth pressure that are presented in the report for the proposed swimming pool/spa and raised bond beam (max. 5’ deep swimming pool with max. 64” raised bond-beam) and site retaining walls. If presumptive values are being recommended by the consultant, please state the reference and use values consistent with the appropriate soil type in Tables 1806.2 and 1610.1 of the 2022 California Building Code. Provide justification for the soil type (Class) and parameters in Tables 1806.2 and 1601.1 that are being recommended for use. If soil parameters other than soil class 5 in Table 1806.2 or clay in Table 1610.1 are provided, please justify the soil type by laboratory testing. Repeat comment-the results of strength testing (direct shear) of the Old Paralic Deposits and Santiago Formation are not provided in the “Response to City of Carlsbad…” report. In the absence of strength testing and with the responses provided by the geotechnical consultant in the “Response to City of Carlsbad…” report in mind, please provide laboratory testing and/or specific tables/charts from the NAVFAC and calculations that justify the values for passive pressure, friction, and active pressure for swimming pool and retaining wall (raised bond beam) design. Please also provide a statement attesting that the content of the NAVFAC document (1982) remains appropriate for use in geotechnical design of the project with respect to the current standard of practice.) Ballard Pool Job No. 23-14471 Carlsbad, California Page 2 GEI Response: Based on our subsurface investigation and recent laboratory testing, we performed strength testing (direct shear testing) and expansion testing on a bulk sample of the Old Paralic Deposits and were able to confirm the recommended modified soil design values for bearing capacity, passive pressure, coefficient of friction and active/at-rest earth pressure included in our original report. As previously stated, the swimming pool site is underlain by a very thin layer of silty sand fill soil (SM) over silty sandstone formational material (SM) and clayey sand formation (SC). The results of our laboratory shear test resulted in a friction angle of 32 degrees and cohesion of 345, and a second shear test yielded a friction angle of 34 degrees and cohesion of 346. The expansion test determined the sandy on- site soils have a very low expansion potential with an expansion index of 4 and the clayey on-site soils in the pool area on top of Santiago Formation have a medium expansion potential with an expansion index of 76. Refer to Appendix A for logs and lab. Comment No. 2: With respect the slope stability analysis provided in Appendix B of the recent “Response to City of Carlsbad…” report and the absence of strength testing, please provide the laboratory testing and specific table/charts from NAVFAC and calculations that justify the shear strength values (Cohesion and friction angle) used in the slope stability analysis for the Old Paralic Deposits (Cohesion=200 and Friction angle=32) and Santiago Formation (Cohesion=300 and Friction angle=30). GEI Response: Based on our recent laboratory testing, we have revised the slope stability analysis using the updated values for cohesion and friction angle. As such, we have determined that the proposed temporary slope will have a factor of safety at least 1.25 for the maximum height of 10.3 feet. The final slope stability will not be impacted by the proposed project. Refer to Appendix B (attached) for our slope stability calculations. Comment No. 3: As the swimming pool is backed by an ascending slope and excavation into the slope appears to be proposed to construct the proposed swimming pool/spa (5’ deep max.) and 5.3’ high raised bond-beam, please provide recommendations (maximum height of vertical and/or inclination of temporary slope, slot cuts, etc.) for temporary backcuts associated with the swimming pool/spa and raised bond-beam construction. Please provide recommendations that address the up to approximately 10.3’ high cut into the ascending slope that will apparently be required to construct the proposed swimming pool/spa and raised bond-beam and site walls. GEI Response: Based on a review of the pool plan set, the pool/spa construction will require removal of the existing 5-foot-high retaining wall, resulting in a 5.3-foot vertical cut into the dense formational sandstone. The swimming pool/spa excavation will then continue an additional 5 feet below the top of pool, resulting in a maximum vertical cut of approximately 10.3 feet adjacent to the ascending slope. Based on Ballard Pool Job No. 23-14471 Carlsbad, California Page 3 our recent laboratory testing (direct shear test results) and our revised slope stability analysis, it is our opinion that the temporary vertical cut will be stable in the pool excavation and can be made continuously the length of the pool to a maximum height of 10.3 feet. The shallow end of the pool will result in a vertical cut of approximately 8.8 feet. No temporary slot cuts will be required. This is a very common practice during pool/spa construction and that is one reason the pool industry is exempt from OSHA requirements specially if slope stability calculations are provided by the geotechnical consultant. As always, our firm will make observations of the pool/spa excavation and temporary cuts during construction. LIMITATIONS The findings and opinions presented herein have been made in accordance with generally accepted principles and practice in the field of geotechnical engineering within the City of Carlsbad. No warranty, either expressed or implied, is made. If you have any questions regarding this letter, please contact our office. Reference to our Job No. 23-14471 will help expedite a response to your inquiry. Respectfully submitted, GEOTECHNICAL EXPLORATION, INC. _______________________________ ______________________________ Jaime A. Cerros, P.E. Jay K. Heiser R.C.E. 34422/G.E. 2007 Senior Project Geologist Senior Geotechnical Engineer _______________________________ Leslie D. Reed, President C.E.G.999/P.G.3901 APPENDIX A Exploratory Logs and Lab Results i i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igure No. IVb JOB NAME: Ballard Pool SITE LOCATION: 1881 East Pointe Avenue, Carlsbad, CA DIRECT SHEAR JOB NUMBER: 23-14471 U.S.C.S.SILTY SAND (SM) Cohesion (psf)345.6 Symbol Source of Material HP-2 Depth 2 feet Friction Angle ಶ (degrees)32.4 Test Method ASTM D3080, Unsaturated Peak, Remolded to 90% 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 0 500 1000 1500 2000 2500 3000 3500 4000 4500 Sh e a r S t r e n g t h ( p s f ) Normal Load (psf) Standard Test Method for Direct Shear Tests of Soils APPENDIX B Slope Stability Analysis Calculations i i 1.400 1.951 2.018 1.682 2.033 1.809 1.400 250.00 lbs/ft2 1.400 1.951 2.018 1.682 2.033 1.809 1.400 Material Name Color Unit Weight (lbs/Ō3)Strength Type Cohesion (psf) Phi (deg) Water Surface Ru EXISTING FILL (Qaf)120 Mohr-Coulomb 150 28 None 0 VERY OLD PARALIC DEPOSITS (Qvop12)120 Mohr-Coulomb 345 32 None 0 SANTIAGO FORMATION (Tsa)120 Mohr-Coulomb 346 34 None 0 Project SummaryBALLARD SWIMMING POOLGLOBAL SLOPE STABILITYR.A.C.G.E.I.1/10/2024, 10:10:37 AMSECTION A-A.BISHOP SIMP. PROPOSED POOL TAMARACK AVENUE EXISTINGRESIDENCE Safety Factor 0.250 0.500 0.750 1.000 1.250 1.500 1.750 2.000 2.250 2.500 2.750 3.000 3.250 3.500 3.750 4.000 4.250 4.500 4.750 5.000 5.250 5.500 5.750 6.000+ 30 0 28 0 26 0 24 0 22 0 20 0 -40 -20 0 20 40 60 80 100 120 Analysis Description GLOBAL SLOPE STABILITY Company G.E.I.Scale 1:200Drawn By R.A.C. File Name JOB NO. 23-14471_S(A)_01.slimDate1/10/2024, 10:10:37 AM Project BALLARD SWIMMING POOL SLIDEINTERPRET 6.039 6(&7,21$$ 6WDWLFFLUFXODUDQDO\VLV RIWKHYHUWLFDOZLWKRXW DQ\WHPSRUDU\FXWVRU VKRULQJXVLQJRXU ODERUDWRU\GLUHFWVKHDU YDOXHV 1.822 2.361 2.225 2.291 1.928 1.991 2.055 1.822 250.00 lbs/ft2 572.00 lbs/ft2 0.00 lbs/ft2 1.822 2.361 2.225 2.291 1.928 1.991 2.055 1.822 Material Name Color Unit Weight (lbs/Ō3)Strength Type Cohesion (psf) Phi (deg) Water Surface Ru EXISTING FILL (Qaf)120 Mohr-Coulomb 150 28 None 0 VERY OLD PARALIC DEPOSITS (Qvop12)120 Mohr-Coulomb 345 32 None 0 SANTIAGO FORMATION (Tsa)120 Mohr-Coulomb 346 34 None 0 Project SummaryBALLARD SWIMMING POOLGLOBAL SLOPE STABILITYR.A.C.G.E.I.1/10/2024, 11:08:48 AMSECTION A-A.BISHOP SIMP. PROPOSED POOL TAMARACK AVENUE EXISTINGRESIDENCE Safety Factor 0.250 0.500 0.750 1.000 1.250 1.500 1.750 2.000 2.250 2.500 2.750 3.000 3.250 3.500 3.750 4.000 4.250 4.500 4.750 5.000 5.250 5.500 5.750 6.000+ 30 0 28 0 26 0 24 0 22 0 20 0 -40 -20 0 20 40 60 80 100 120 Analysis Description GLOBAL SLOPE STABILITY Company G.E.I.Scale 1:200Drawn By R.A.C. File Name JOB NO. 23-14471_S(A)_02.slimDate1/10/2024, 11:08:48 AM Project BALLARD SWIMMING POOL SLIDEINTERPRET 6.039 SFI 6(&7,21$$ 6WDWLFFLUFXODUDQDO\VLV RIWKHVORSHZLWKDODWHUDO WULDQJXODUDFWLYHHDUWK SUHVVXUHRISFIWR VXSSRUWWKHYHUWLFDOFXW IRUWKHSRROVKHOO /DERUDWRU\GLUHFWVKHDU WHVWYDOXHVZHUHXVHGIRU WKLVDQDO\VLV 1.220 1.328 1.566 1.400 1.399 1.749 1.220 250.00 lbs/ft2 572.00 lbs/ft2 0.00 lbs/ft2 1.220 1.328 1.566 1.400 1.399 1.749 1.220 Material Name Color Unit Weight (lbs/Ō3)Strength Type Cohesion (psf) Phi (deg) Water Surface Ru EXISTING FILL (Qaf)120 Mohr-Coulomb 150 28 None 0 VERY OLD PARALIC DEPOSITS (Qvop12)120 Mohr-Coulomb 200 32 None 0 SANTIAGO FORMATION (Tsa)120 Mohr-Coulomb 345 32 None 0 Project SummaryBALLARD SWIMMING POOLGLOBAL SLOPE STABILITYR.A.C.G.E.I.1/10/2024, 11:16:40 AMSECTION A-A.BISHOP SIMP. PROPOSED POOL TAMARACK AVENUE EXISTINGRESIDENCE 0.15 Safety Factor 0.250 0.500 0.750 1.000 1.250 1.500 1.750 2.000 2.250 2.500 2.750 3.000 3.250 3.500 3.750 4.000 4.250 4.500 4.750 5.000 5.250 5.500 5.750 6.000+ 30 0 28 0 26 0 24 0 22 0 20 0 -40 -20 0 20 40 60 80 100 120 Analysis Description GLOBAL SLOPE STABILITY Company G.E.I.Scale 1:200Drawn By R.A.C. File Name JOB NO. 23-14471_S(A)_02w_0.15gSHAKE.slimDate1/10/2024, 11:16:40 AM Project BALLARD SWIMMING POOL SLIDEINTERPRET 6.039 6(&7,21$$ 6HLVPLFFLUFXODUDQDO\VLV RIWKHVORSHZLWKDODWHUDO WULDQJXODUDFWLYHHDUWK SUHVVXUHRISFIWR VXSSRUWWKHYHUWLFDOFXWSFI GEOTECHNICAL REPORT REVIEW __________________________________________________________ DATE: February 29, 2024 TO: City of Carlsbad Land Development Engineering 1635 Faraday Avenue Carlsbad, CA 92008 Attention: Jason Geldert/Shay Glass PROJECT ID: CBR2023-3526 GRADING PERMIT NO.: - SUBJECT: Swimming Pool & Raised Bond-Beam, 1881 East Pointe Avenue (3rd review) Items Submitted by Applicant Items Being Returned to Applicant x “Response to City of Carlsbad Comments, Ballard Pool, 1881 East Pointe Avenue, Carlsbad, California,” by Geotechnical Exploration, Inc., dated February 23, 2024. x x “Response to City of Carlsbad Comments, Ballard Pool, 1881 East Pointe Avenue, Carlsbad, California,” by Geotechnical Exploration, Inc., dated January 19, 2024. x x “Preliminary Recommendations for Swimming Pool, Ballard Swimming Pool, 1881 East Pointe Avenue, Carlsbad, California,” by Geotechnical Exploration, Inc., dated October 30, 2023. x GEOTECHNICAL COMMENTS: 1. Based on the review of the geotechnical reports for the proposed project prepared by Geotechnical Exploration, Inc., referenced above, there are no additional geotechnical related comments at this time. 2. Note to City Staff: The geotechnical consultant has indicated in the “Response to City of Carlsbad Comments…” that they should observe the temporary cuts for the swimming pool/spa during the excavation process. The city Building/Grading inspector for the project should confirm that all necessary observations and recommendations of the temporary cuts are performed by the geotechnical consultant to ensure a safe and stable working condition. 30 October 2023 Mr. Chase Ballard Job No. 23-14471 1881 East Pointe Avenue Carlsbad, CA 92008 Subject: Preliminary Recommendations for Swimming Pool Design Ballard Swimming Pool 1881 East Pointe Avenue Carlsbad, California Dear Mr. Ballard: In accordance with your request, and as required by the pool engineer, we are providing pertinent soil design parameters for the calculation of soil static and earthquake design forces acting on the swimming pool shell in compliance with the 2022 California Building Code (CBC), Section 1802. We have not performed a geotechnical investigation at the site, however, we observed the proposed new pool area. A representative of our firm will have to visit the property at the time the pool excavation is completed to confirm that the soil design parameters recommended herein are suited for the encountered conditions. The conventional pool is being built in the southwest rear yard area adjacent to an ascending slope. Our scope of services to date has been limited to a site visit, discussion of conceptual pool plans and preparation of this letter. Based on our conversation, we understand that the proposed pool engineering plans are for a conventional pool shell that will include seismic and static soil pressures. We should review the project plans before Ballard Swimming Pool Job No. 23-14471 Carlsbad, California Page 2 construction to verify their adequate conformance with our recommendations. Additional or modified recommendations may be provided as warranted. Based on review of the referenced building code, a geotechnical report is required, including lateral pressures due to earthquake motions, if: 1. The pool is deeper than 6 feet, or 2. Any portion of the pool is located less than 10 feet from the top of a slope (3.0:1.0, horizontal to vertical slope gradient, or steeper and greater than 20 feet in height), or 3. The pool requires a deep foundation (piers or pilings), or 4. The clear distance between the pool wall and an adjacent habitable building foundation is less than the pool depth in the area near the building foundation, or 5. The pool is less than 3 feet from the property line. If one or more of these conditions exist, the pool designer should submit design calculations including static lateral soil pressures and dynamic soil pressures due to earthquake motions in compliance with the 2022 CBC, Section 1802. As such, we present soil design parameters for static soil pressures and increment seismic loading applicable to the site. SEISMIC SOIL LOADING and OTHER RECOMMENDATIONS These soil design parameters are based on our site observations where the new swimming pool will be built in the southwest rear yard adjacent to an ascending slope. We understand the pool will have a depth of 3.5 to 5 feet with a 64-inch raised bond beam on the southwest side. Based on our observations of the soil conditions in the vicinity, we assume the exposed soils encountered at the bottom of the proposed Ballard Swimming Pool Job No. 23-14471 Carlsbad, California Page 3 swimming pool should be silty/clayey sand fill soil or dense formation. It is likely that the pool shell will be founded entirely in dense formation or properly compacted fill. Our firm should verify if a transition between cut and fill exists under the proposed pool excavation. If a transition exists, the pool bottom soils should be undercut to provide a properly compacted all-fill layer supporting the pool shell. The differential in fill thickness under the pool should not exceed 5 feet to reduce differential soil settlement under the pool. We recommend that for low to medium expansive soils, the retaining pool shell should be designed with 45 pcf for level backfill static loading and 62 pcf for any sloping backfill from the adjacent ascending slope. For a pool built on properly compacted fill or dense natural soils, use an allowable soil bearing capacity of 2,000 psf. If soil seismic loads are included for a non-yielding pool shell, an additional triangular pressure should be used starting at the top of the wall with zero pressure, with the maximum value at the bottom, increasing at a rate of 13 pcf. The resultant increment of dynamic soil pressure should be added to the static loading. The resultant seismic increment in soil pressure should be applied at one-third of the height measured from the bottom. The resultant static load of the soil pressure should be applied one-third the height from the bottom of the pool. Considering the requirements of the 2022 CBC and ASCE 7-16, the site can be classified, based on the anticipated bearing soils for the proposed pool, as Site Class D- Stiff Soil, with coordinates -117.3171 and 33.1545. Based on this classification, the following recommendations apply for the pool design: 1. The design of the structure and foundations may be based on Seismic Design Category D, Risk Factor II. Ballard Swimming Pool Job No. 23-14471 Carlsbad, California Page 4 2. The structural seismic design, when applicable, should be based on the following values that are based on the site location, soil characteristics, and seismic maps by USGS and ASCE 7-16, as required by the 2022 CBC. The soil seismic design parameters have been determined with the ATC Hazards by Location Tool, which is based on the USGS Seismic Design Maps and ASCE 7- 16. The summarized seismic soil values by ATC are presented below in Table I, and a complete printout is presented as Appendix A. TABLE I Mapped Spectral Acceleration Values and Design Parameters Ss S1 Fa Fv Sms Sm1 Sds Sd1 1.012g 0.369g 1.095 1.93 1.108g 0.712g 0.739g 0.474g 3. Pool and foundation excavations should be inspected by a representative of our firm as required by the 2022 CBC in Section 1705 before steel reinforcement or forms are placed. 4. All soil-related recommendations presented in this letter are applicable unless superseded or modified in writing by our firm, based on additional information from upcoming site observations. 5. New or loose fill soils to support a planned pool deck should be properly moisture-conditioned and compacted prior to steel and concrete placement. Any fills to support the pool shell should also be properly compacted. 6. Any new fill and/or backfill soils should also be properly compacted to at least 90 percent of Maximum Dry Density determined per ASTM D1557-12. Any fill or backfill soils to be recompacted should be tested at least every 2 feet in thickness as it is being placed and recompacted. Ballard Swimming Pool Job No. 23-14471 Carlsbad, California Page 5 7. The recommended allowable soil bearing capacity of the on-site, properly compacted fill soils or dense natural soil is 2,000 psf. The allowable soil friction coefficient is 0.35. A static active equivalent fluid weight of at least 45 pcf should be used for the pool wall with level backfill using low to medium expansive soil and 62 pcf for any sloping backfill from the adjacent ascending slope. The soil seismic increment of 13 pcf presented previously should be included in the pool shell design for a pool wall over 6 feet. Surcharge loads applied within a distance equal to the pool depth from the pool wall should be considered by converting the uniform vertical load to uniform horizontal load using a conversion factor of 0.47. If highly expansive soils are encountered, the soil pressures above should be increased by a factor of 1.8. 8. Proper drainage with area drains should be provided in the pool deck area and should be built on properly compacted fill. The pool deck slab should be at least 4 inches thick and be reinforced with at least No. 3 bars every 18 inches apart unless designed as a structural slab (which might require still more reinforcing) with supports properly spaced to span the design distances. Adequate spaced control joints should be placed by the contractor and sealed with elastomeric joint sealant. Joint spacing should not exceed 12 feet apart. Joints should also be placed at re-entrant corners. The control joints should be placed within 12 hours after concrete placement and penetrate at least one- quarter the thickness of the slab. All joints should be sealed with elastomeric joint sealant. Drainage on and around the pool deck should be positive to drain away from the deck’s perimeter and slope top, and directed toward area drains. Proper drainage should be provided behind any raised bond beam. Ballard Swimming Pool Job No. 23-14471 Carlsbad, California Page 6 9. Areas with clayey soils to receive flatwork concrete should be verified for soil moisture content at least 3 percent over optimum and proper compaction within 48 hours prior to concrete placement. Any fill soils deeper than 2 feet in thickness should be tested as they are being placed. If expansive soils are encountered, water soluble sulfate tests should be performed and the structural engineer should specify type of cement and water-cement ratio to be used. The findings, opinions, and recommendations presented herein have been made in accordance with current generally accepted principles and practice in the field of geotechnical engineering in the City of Carlsbad. No warranty, either expressed or implied, is made. This report is valid for a period of two (2) years and is subject to review by our firm after that time. This opportunity to be of service is sincerely appreciated. Should you have any questions regarding this matter, please contact the undersigned. Reference to our Job No. 23-14471 will help to expedite a response to your inquiries. Respectfully submitted, GEOTECHNICAL EXPLORATION, INC. _______________________________ ______________________________ Jay K. Heiser Jaime A. Cerros, P.E. Senior Project Geologist R.C.E. 34422/G.E. 2007 Senior Geotechnical Engineer This is a beta release of the new ATC Hazards by Location website. Please contact us with feedback. The ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why. Hazards by Location Search Information Coordinates:33.1545, -117.3171 Elevation:234 ft Timestamp:2023-10-30T19:42:48.359Z Hazard Type:Seismic Reference Document:ASCE7-16 Risk Category:II Site Class:D Basic Parameters Name Value Description SS 1.012 MCER ground motion (period=0.2s) S1 0.369 MCER ground motion (period=1.0s) SMS 1.108 Site-modified spectral acceleration value SM1 * null Site-modified spectral acceleration value SDS 0.739 Numeric seismic design value at 0.2s SA SD1 * null Numeric seismic design value at 1.0s SA * See Section 11.4.8 Additional Information Name Value Description SDC * null Seismic design category Fa 1.095 Site amplification factor at 0.2s Fv * null Site amplification factor at 1.0s CRS 0.898 Coefficient of risk (0.2s) CR1 0.909 Coefficient of risk (1.0s) PGA 0.443 MCEG peak ground acceleration FPGA 1.157 Site amplification factor at PGA PGAM 0.513 Site modified peak ground acceleration TL 8 Long-period transition period (s) SsRT 1.012 Probabilistic risk-targeted ground motion (0.2s) SsUH 1.127 Factored uniform-hazard spectral acceleration (2% probability of exceedance in 50 years) SsD 1.5 Factored deterministic acceleration value (0.2s) S1RT 0.369 Probabilistic risk-targeted ground motion (1.0s) S1UH 0.406 Factored uniform-hazard spectral acceleration (2% probability of exceedance in 50 years) S1D 0.6 Factored deterministic acceleration value (1.0s) PGAd 0.5 Factored deterministic acceleration value (PGA) * See Section 11.4.8 The results indicated here DO NOT reflect any state or local amendments to the values or any delineation lines made during the building code adoption process. Users should confirm any output obtained from this tool with the local Authority Having Jurisdiction before proceeding with design. Please note that the ATC Hazards by Location website will not be updated to support ASCE 7-22. Find out why. Disclaimer Hazard loads are provided by the U.S. Geological Survey Seismic Design Web Services. While the information presented on this website is believed to be correct, ATC and its sponsors and contributors assume no responsibility or liability for its accuracy. The material presented in the report should not be used or relied upon for any specific application without competent examination and verification of its accuracy, suitability and applicability by engineers or other licensed professionals. ATC does not intend that the use of this information replace the sound judgment of such competent professionals, having experience and knowledge in the field of practice, nor to substitute for the standard of care required of such professionals in interpreting and applying the results of the report provided by this website. Users of the information from this website assume all liability arising from such use. Use of the output of this website does not imply approval by the governing building code bodies responsible for building code approval and interpretation for the building site described by latitude/longitude location in the report. 234 ft234 ft Map data ©2023 Google, INEGI Report a map error D 1.93 0.474 $33(1',;$ GEOTECHNICAL REPORT REVIEW __________________________________________________________ DATE: November 24, 2023 TO: City of Carlsbad Land Development Engineering 1635 Faraday Avenue Carlsbad, CA 92008 Attention: Nichole Fine PROJECT ID: CBR2023-3526 GRADING PERMIT NO.: - SUBJECT: Swimming Pool & Raised Bond-Beam, 1881 East Pointe Avenue (1st review) Items Submitted by Applicant Items Being Returned to Applicant x “Preliminary Recommendations for Swimming Pool, Ballard Swimming Pool, 1881 East Pointe Avenue, Carlsbad, California,” by Geotechnical Exploration, Inc., dated October 30, 2023. x Written report review comments. x Swimming pool plans and details, Ballard Residence, 1881 East Pointe Avenue, Carlsbad, CA, by Swift Permits, Inc. and Pool Engineering, Inc. x Based on our review of the submitted geotechnical report, we are providing the following comments that should be addressed prior to the next submittal. Please provide complete and thorough written responses to all comments. GEOTECHNICAL COMMENTS: 1. The “Preliminary Recommendations for Swimming Pool Design…” report by GEI provides geotechnical parameters and recommendations for the proposed project without any subsurface exploration, etc., to substantiate the parameters and recommendations. With the above in mind, the following comments are provided that should be addressed prior to the next submittal. 2. Please provide subsurface exploration as necessary to investigate and evaluate the soil/geologic conditions underlying the proposed swimming pool/spa. The degree of subsurface exploration performed should be dependent on the topography and anticipated underlying geologic conditions at the subject site, with the exploration consisting at a minimum of an exploratory excavation (test pit/boring) to at least the depth of the proposed swimming pool/spa and/or adequate depth to determine the underlying geologic conditions for the proposed improvement. CBR2023-3526 November 24, 2023 Page 2 of 3 3. Please investigate and evaluate the potential for a transition condition (fill/bedrock) at the location of the proposed swimming pool/spa and provide recommendations to address as necessary. 4. Please provide the appropriate laboratory testing to substantiate the values for bearing capacity, passive pressure, coefficient of friction, and active/at-rest earth pressure that are presented in the report for the proposed deep swimming pool/spa and raised bond-beam (max. 5’ deep swimming pool with max. 64” raised bond-beam) and site retaining walls. If presumptive values are being recommended by the consultant, please state the reference and use values consistent with the appropriate soil type in Tables 1806.2 and 1610.1 of the 2022 California Building Code. Provide justification for the soil type (Class) and parameters in Tables 1806.2 and 1610.1 that are being recommended for use. If soil parameters other than soil class 5 in Table 1806.2 or clay in Table 1610.1 are provided, please justify the soil type by laboratory testing. 5. Please provide justification for the active pressure of 45 pcf (level) and 62 pcf (sloping) that are provided for the swimming pool/spa (5’ deep max.) and 5.3’ high (max.) raised bond beam and site retaining wall design (see comment #4 above). Please address any geologic surcharge on the swimming pool/spa and raised bond beam and site walls as necessary. 6. Soluble sulfate testing is not provided in the reviewed geotechnical report. Consequently and in the absence of testing, please provide recommendations for sulfate resistant concrete (compressive strength, w/c ratio, type cement) consistent with the 2022 California Building Code and ACI 318, Tables 4.2.1 and 4.3.1 assuming a “Severe” (S2) exposure class (or provide laboratory testing to support a different sulfate exposure classification). 7. Please provide a discussion addressing the composition (fill slope, cut slope, etc.) of the approximate 32’ high ascending slope backing the area of the proposed swimming pool/spa and raised bond-beam and site walls, and the soil/geologic conditions associated with the slope. Please discuss the thickness/quality of fill and/or geologic structure (direction and dip of bedding, fracturing, etc., for bedrock) for the slope as applicable. 8. Please discuss the gross and surficial stability of the ascending slope backing the area of the proposed swimming pool/spa and raised bond-beam and site walls, and the potential impact of the slope on the proposed project and visa-versa. 9. As the swimming pool is backed by an ascending slope and excavation into the slope appears to be proposed to construct the proposed swimming pool/spa (5’ deep max.) and 5.3’ high raised bond-beam, please provide recommendations (maximum height of vertical and/or inclination of temporary slope, slot cuts, etc.) for temporary backcuts associated with swimming pool/spa and raised bond-beam construction. Please provide recommendations that address the up to approximately 10.3’ high cut into the ascending slope that will apparently be required to construct the proposed swimming pool/spa and raised bond-beam and site walls. 10. Please provide recommendations (retaining wall freeboard, etc.) as necessary to address and mitigate potential adverse impacts from any potential surficial instability within the ascending slope backing the area of the proposed swimming pool/spa and raised bond- beam. CBR2023-3526 November 24, 2023 Page 3 of 3 11. Please provide a “Geotechnical Map” map utilizing the most current revision of the site plan for the project as the base map and at a sufficiently large scale to clearly show (at a minimum): a) existing site topography and ascending slope, b) proposed swimming pool/spa and raised bond-beam and other improvements, c) proposed finished grades and TW elevation, d) geologic units, and e) the locations of subsurface exploration. 12. Please provide a geologic cross-section (oriented generally east/west and perpendicular to the existing ascending slope) based on the requested “Geotechnical Map” and scale/legibility comments requested above in comment #11. 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