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Home My WebLink About_2025-02-19-05A GeoTechnical Plan Review #4 (GeoSolutions #SL13552-1)_v1 (1) GEOTECHNICAL PLAN REVIEW #4 – Lot 24 Hansen Lane Dear Vellum Inc., This report presents the results of our geotechnical review of the project plans for the proposed single-family residence to be located on Lot 24, Hansen Lane within The Enclave - Phase III of Tract 3063, San Luis Obispo, California. The purpose of our review was to evaluate the proposed plans for with respect to geotechnical recommendations provided in the referenced reports and with known site conditions. Our review was conducted for the sheets listed in Table 1 below. Table 1: List of Sheets Reviewed Title Date Sheet Prepared By Cover Sheet February 10, 2025 C1.0 Walsh Engineering Notes February 10, 2025 C2.0 Walsh Engineering Grading and Drainage Plan February 10, 2025 C3.0 Walsh Engineering Site Cross Sections February 10, 2025 C5.0 Walsh Engineering Details February 10, 2025 C6.0 Walsh Engineering Retaining Wall Plan & Profile February 10, 2025 RW1.0 Walsh Engineering Legends February 2, 2025 S-000 FTF Engineering, Inc. General Notes 1 February 2, 2025 S-001 FTF Engineering, Inc. First Floor/Foundation Plan February 2, 2025 S-200 FTF Engineering, Inc. Second Floor Framing Plan February 2, 2025 S-201 FTF Engineering, Inc. Concrete Details 1 February 2, 2025 S-300 FTF Engineering, Inc. Foundation Details February 2, 2025 S-310 FTF Engineering, Inc. CMU Wall Details February 2, 2025 S-400 FTF Engineering, Inc. It is our opinion that the proposed plans (as listed in Table 1) are in general conformance with the recommendations presented in the referenced reports. If subsequent changes are made to the reviewed plans, GeoSolutions, Inc. must be notified of said changes to verify continued compliance with the referenced reports. ADDITIONAL GEOTECHNICAL SERVICES It is assumed that GeoSolutions, Inc. will be retained to perform construction inspections and testing as required including, but not limited to, stripping, grading, over-excavating, subdrain placement, compaction, retaining wall backfill placement, imported materials, and foundation excavation. LIMITATIONS Our review was performed in accordance with the usual and current standards of the profession, as they relate to this or similar localities. No other warranty, expressed or implied, is made as to the conclusions and professional advice included in this plan review. It should be noted that it is the responsibility of the owner or his/her representative to notify GeoSolutions, Inc. a minimum of 72 hours before any stripping, grading, or foundation excavations can commence at this site. DATE: February 12, 2025 PROJECT NUMBER: SL13552-1 CLIENT: Vellum Inc. 3590 Broad Street Ste 130 San Luis Obispo, CA 93401 PROJECT NAME: Lot 24 Enclave Hansen Lane San Luis Obispo California Enclave Phase III, Plan Review #4 February 12, 2025 Project SL13552-1 2 In addition to the construction inspections listed above, section 1705.6 of the 2022 CBC (CBC, 2022) requires the following inspections by the Soils Engineer for controlled fill thicknesses greater than 12 inches as shown in Table 2: Required Verification and Inspections of Soils: Table 2: Required Verification and Inspections of Soils Verification and Inspection Task Continuous During Task Listed Periodically During Task Listed 1. Verify materials below footings are adequate to achieve the design bearing capacity. - X 2. Verify excavations are extended to proper depth and have reached proper material. - X 3. Perform classification and testing of controlled fill materials. - X 4. Verify use of proper materials, densities and lift thicknesses during placement and compaction of controlled fill. X - 5. Prior to placement of controlled fill, observe sub-grade and verify that site has been prepared properly. - X The recommendations of this review are based upon the assumption that the soil conditions do not deviate from those disclosed during the soil engineering study. Should any variations or undesirable conditions be encountered during the development of the Site, GeoSolutions, Inc. will provide supplemental recommendations as dictated by the field conditions. This review is issued with the understanding that it is the responsibility of the owner or his/her representative to ensure that the information and recommendations contained herein are brought to the attention of the architect and engineer for the project. The owner or his/her representative is responsible to ensure that the necessary steps are taken to see that the contractor and subcontractors carry out such recommendations in the field. As of the present date, the findings of this review are valid for the property studied. With the passage of time, changes in the conditions of a property can occur whether due to natural processes or to the works of man on this or adjacent properties. Therefore, this review should not be relied upon after a period of one year without our subsequent review nor should it be used or is it applicable for any properties other than those studied. However, many events such as floods, earthquakes, grading of the adjacent properties and building and municipal code changes could render this review invalid in less than a year. Thank you for the opportunity to have been of service in preparing this report. If you have any questions or require additional assistance, please feel free to contact the undersigned at (805) 543-8539. Sincerely, GeoSolutions, Inc. Kraig R. Crozier, PE Principal, C61361 \\192.168.1.100\s\SL13500-SL13999\SL13552-1 - Enclave Various Lots\Construction\SL13552-1 Enclave Lot 34 Plan Review #3.doc Enclave Phase III, Plan Review #4 February 12, 2025 Project SL13552-1 3 References Soils Engineering Report Update, Orcutt Area Expansion Specific Plan, Including APN: 004-705-008; 004-706-002, 006, -007, -008, and -009; 004-707-001; and 053-061-024, San Luis Obispo City and County, California, by GeoSolutions, Inc., Project No. SL07509-10, dated January 8, 2019. Field Grading Report #8 – Tract 3063, Phase III – Rough grading, Orcutt Area Expansion Specific Plan, Phase III, Tract 3063, San Luis Obispo, California, by GeoSolutions, Inc., Project No. SL07509-10, dated February 24, 2021 (revised). Soils Engineering Report Update, The Enclaves, Lots 1, 6, 22-26, and 34, Off Orcutt Road, San Luis, California, by GeoSolutions, Inc., Project No. SL13552-1, dated September 11, 2023. Geotechnical Plan Review #1, The Enclaves, Lot 25, 1415 Hanson Lane, San Luis, California, by GeoSolutions, Inc., Project No. SL13552-1, dated December 4, 2023. Geotechnical Plan Review #2, The Enclaves, Lot 26, 1421 Hanson Lane, San Luis, California, by GeoSolutions, Inc., Project No. SL13552-1, dated December 19, 2023. Geotechnical Plan Review #3, The Enclaves, Lot 34, 1469 Hanson Lane, San Luis, California, by GeoSolutions, Inc., Project No. SL13552-1, dated December 13, 2024. Geotechnical Plan Review #3 Revised, The Enclaves, Lot 34, 1469 Hanson Lane, San Luis, California, by GeoSolutions, Inc., Project No. SL13552-1, dated December 13, 2024, Revised January 14, 2025.