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HomeMy WebLinkAboutPD 2022-0022; CANTOR GARAGE ADDITION; FINAL SOILS REPORT; 2025-08-18Josh Cantor EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC 10925 HARTLEY ROAD, SUITE "I" SANTEE, CALIFORNIA 92071 TEL. 619-258-7901 4215 Hillside Drive Carlsbad, California 92008 Subject: Final A~Graded Soil Report for Proposed Detached Garage 4269 Hillside Drive Carlsbad, California 92008 Project No. PD2022-0022, Grading Permit No. GR2022-0031 References: • See Attached Dear Mr. Cantor: August 18, 2025 Project No. 21-1106G7 In accordance with your request, this report has been prepared as a final as-graded soils report for the proposed detached garage and retaining wall located at 4269 Hillside Drive, in the City of Carlsbad, California. Based on our field observations and attached Reports of Field Density Tests (References 2 and 4), it is our opinion that the soil engineering and engineering geologic aspects of the site grading are in accordance with the referenced geotechnical reports (References 5, 6 and 7), local grading ordinances and the project grading plans. In addition, the footing excavations, soil expansion characteristics and soil bearing capacity are in conformance with the approved plans and specifications. This opportun.ity to be of service is appreciated. If you have any questions, please do not hesitate to call or contact us. Respectfully Submitted, . RCE 54071, GE 2704 Final As-Graded Soil Report for Proposed Detached Garage 4269 Hillside Drive Carlsbad, California 92008 REFERENCES August 18, 2025 Project No. 21-1106G7 1. "Observation of Footing Excavation for Proposed Retaining Wall, 4269 Hillside Drive, Carlsbad, California 92008", Project No. PD2022-0022, Grading Permit No. GR2022-003 l, Project No. 21- ll06G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated January 8, 2024. 2. "Report of Field Density Tests During Backfill of Retaining Wall, 4269 Hillside Drive, Carlsbad, California 92008", Project No. PD2022-0022, Grading Permit No. GR2022-003 l, Project No. 2 l- l l 06G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated April 22, 2024. 3. "Observation of Footing Excavation for Proposed Retaining Wall, 4269 Hillside Drive, Carlsbad, California 92008", Project No. PD2022-0022, Grading Permit No. GR2022-003 l, Project No. 21- 1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated January 8, 2024. 4. "Report of Field Density Tests for Proposed Detached Garage, 4269 Hillside Drive, Carlsbad, California 92008", Project No. PD2022-0022, Grading Permit No. GR2022-003 l, Project No. 2 l- ll 06G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 30, 2023. 5. "2nd Response to Geotechnical Review for Proposed Garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 30, 2023. 6. "Response to Geotechnical Review for Proposed Garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-ll06G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated December 20, 2022. 7. "Geotechnical Investigation for Proposed Garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-l 106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated June 28, 2021. EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Josh Cantor EAST COUNTY son, CONSULTATION AND ENGINEERING, INC. 10925 HARTLEY ROAD, SUITE "I" SANTEE, CALIFORNIA 92071 TEL. 619-258-7901 4215 Hillside Drive Carlsbad, California 92008 April22,2024 Project No. 21-l 106G7 Subject: Reference: Report of Field Density Tests During Backfill of Retaining Wall 4269 Hillside Drive Carlsbad, California 92008 Project No. PD2022-0022, Grading Permit No. GR2022-0031 See Attached Dear Mr. Cantor: This report presents the results of field density tests performed during the backfill of the retaining wall for the proposed detached garage at the subject site. Backfill was conducted between March 21 and April 10, 2024 under the observation and testing of a representative of East County Soil Consultation & Engineering Inc. Backfill soils consisting of on-site silty sand were placed in 6 to 8-inch-thick lifts, moisture- conditioned over the optimum moisture content and compacted in excess of 90 percent relative compaction. Compaction was achieved with the aid of a hand whacker. In-place field density tests were performed on the compacted fill in accordance with ASTM D1556 (Sand Cone Method). The results of the field density tests and fill compaction values are presented on Table 1, Field Density Test Results. Results of a laboratory maximum density test of the fill soils are presented on Table 2, Laboratory Maximum Density Test Results. The approximate field density test locations are shown on Figure 1. Report of Field Density Tests During Backfill of Retaining Wall 4269 Hillside Drive Carlsbad, California 92008 Pagel April 22, 2024 Project No. 21-1106G7 Based on our field observations and field density test results, it is our opinion that the grading and backfill compaction were performed in accordance with the referenced geotecbnical reports and local grading ordinances. 1his opportunity to be of service is appreciated. If you have any questions, or we can be of further service, please do not hesitate to call or contact us. Mamadou Saliou Diallo, P.E. RCE 54071, GE 2704 Attachments: Tables 1, 2 and Figure 1 EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Report of Field Density Tests During Backfill of Retaining Wall 4269 Hillside Drive Carlsbad, California 92008 TABLE 1 FIELD DENSITY TEST RESULTS TEST SOIL FILL FIELD FIELD MAXIMUM NO. TYPE DEPTH MOISTURE DRY DRY (FEET) CONTENT DENSITY DENSITY (%) (PCF) (PCF) 1 1 2 10.7 124.7 127.0 2 1 2 13 .3 124.2 127.0 3 1 4 11.8 121.8 127.0 4 1 4 10.3 118.6 127.0 5 1 FG 11.6 121.2 127.0 6 1 FG 11.4 116.7 127.0 FG = FINISHED GRADE TABLE2 Page3 April 22, 2024 Project No. 21-1106G7 FILL COMPACTION (%) 98 98 96 93 95 92 LABO RA TORY MAXIMUM DENSITY TEST RESULTS ASTMD1557 SOIL SOIL MAXIMUM OPTIMUM TYP DESCRIPTION DRY DENSITY MOISTURE E (PCF) CONTENT (%) 1 DARK BROWN, SILTY SAND 127.0 9.5 EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Report of Field Density Tests During Backfill of Retaining Wall 4269 Hillside Drive Carlsbad, California 92008 FIGURE 1 LOCATIONS OF FIELD DENSITY TESTS ,----- Page4 April 22, 2024 Project No. 21-1106G7 r EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Report of Field Density Tests During Backfill of Retaining Wall 4269 Hillside Drive Carlsbad, California 92008 REFERENCES Page 5 April 22, 2024 Project No. 21-1106G7 1. "Observation of Footing Excavation for Proposed Retaining Wall, 4269 Hillside Drive, Carlsbad, California 92008", Project No. PD2022-0022, Grading Permit No. GR2022- 0031 , Project No. 21-1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated January 8, 2024. 2. "Report of Field Density Tests for Proposed Detached Garage, 4269 Hillside Drive, Carlsbad, California 92008", Project No. PD2022-0022, Grading Permit No. GR2022- 003 l, Project No . 21-1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 30, 2023 . 3. "2nd Response to Geotechnical Review for Proposed Garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 30, 2023 . 4. "Response to Geotechnical Review for Proposed Garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated December 20, 2022. 5. "Geotechnical Investigation for Proposed garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated June 28, 2021. EAST COUNrY SOIL CONSULTATION AND ENGINEERING, INC. EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Josh Cantor 4215 Hillside Drive Carlsbad, California 92008 10925 HARTLEY ROAD, SUITE "I" SANTEE, CALIFORNIA 92071 TEL. 619-258-7901 December 12, 2023 Project No. 21-1106G7 Subject: Report of Field Density Tests for Proposed Detached Garage 4269 Hillside Drive Carlsbad, California 92008 Project No. PD2022-0022, Grading Permit No. GR2022-0031 References: See Attached Dear Mr. Cantor: This report presents the results of field density tests performed on the building pad for the proposed detached garage at the subject site. Site grading was conducted between December 1 and 4, 2023 under the observation and testing of a representative of East County Soil Consultation & Engineering Inc. The surface soils within the building area for the proposed garage and to a distance of at least 5 feet outside building limits were removed and replaced with compacted fill to depths of2 to 3 feet. Fill soils consisting of on-site silty sand were placed in 6 to 8-inch-thick lifts, moisture- conditioned mostly over the optimum moisture content and compacted in excess of 90 percent relative compaction. Compaction was achieved with the aid of a loader. In-place field density tests were performed on the compacted fill in accordance with ASTM D1556 (Sand Cone Method). The results of the field density tests and fill compaction values are presented on Table 1, Field Density Test Results. Results of a laboratory maximum density test of the fill soils are presented on Table 2, Laboratory Maximum Density Test Results. The approximate field density test locations are shown on Figure 1. Report of Field Density Tests for Proposed Detached Gara2e 4269 Hillside Drive Carlsbad, California 92008 Pare2 December 12, 2023 Project No. 21-1106G7 Based on our field observations and field density test results, it is our opinion that the grading and fill compaction were performed in accordance with the referenced geotecbnical report and local grading ordinances. This opportunity to be of service is appreciated. If you have any questions, or we can be of further service, please do not hesitate to call or contact us. Mamadou Saliou Diallo, P.E. RCE S4071. GE 2704 Attachments: Tables land 2, Figure 1 and References EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Report of Field Density Tests for Proposed Detached Garage 4269 Hillside Drive Carlsbad, California 92008 TABLE 1 FIELD DENSITY TEST RESULTS TEST SOIL FILL FIELD FIELD MAXIMUM NO. TYPE DEPTH MOISTURE DRY DRY (FEET) CONTENT DENSITY DENSITY (%) (PCF) (PCF) 1 1 1 12.1 119.4 127.0 2 1 1.5 11.1 119.5 127.0 3 1 3FG 10.7 115.0 127.0 4 1 2FG 8.8 120.3 127.0 FG = FINISHED GRADE TABLE2 Page3 December 12, 2023 Project No. 21-1106G7 FILL COMPACTION (%) 94 94 91 95 LABORATORY MAXIMUM DENSITY TEST RESULTS ASTM Dl557 SOIL SOIL MAXIMUM OPTIMUM TYP DESCRIPTION DRY DENSITY MOISTURE E (PCF) CONTENT (%) 1 DARK BROWN, SILTY SAND 127.0 9.5 EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Report of Field Density Tests for Proposed Detached Garage 4269 Hillside Drive Carlsbad, California 92008 FIGURE 1 LOCATIONS OF FIELD DENSITY TESTS ,#''(,,~ \\\.---- ; \~ 1/ . •• "I: ·' . Page4 December 12, 2023 Project No. 21-1106G7 EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Report of Field Density Tests for Proposed Detached Garage 4269 Hillside Drive Carlsbad, California 92008 REFERENCES Pages December 12, 2023 Project No. 21-1106G7 1. "2nd Response to Geotechnical Review for Proposed Garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 30, 2023 . 2. "Response to Geotechnical Review for Proposed Garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-1106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated December 20, 2022. 3. "Geotechnical Investigation for Proposed garage and Retaining Walls, 4269 Hillside Drive, Carlsbad, California 92008", Project No. 21-l 106G7, Prepared by East County Soil Consultation and Engineering, Inc., Dated June 28, 2021 . EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC.