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Home My WebLink AboutCDP 2020-0027; MATTHEW RESIDENCE; FINAL SOILS REPORT; 2025-08-21EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC 10925 HARTLEY ROAD, SUITE "I" SANTEE, CALIFORNIA 92071 TEL.619-258-7901 Arvin & Sepideh Matthew 215 Montclair Drive Danville, California 94526 Subject: References: Final As--Graded Soil Report for Proposed Two-Story, Single-Family Residence 5511 Los Robles Drive Carlsbad, CA 92008 See Attached Dear Mr. & Mrs. Matthew: August 21, 2025 Project No. 20-1126G3 In accordance with your request, this report has been prepared as a final as-graded soils report for the proposed two-story, single-family residence located at 5511 Los Robles Drive, in the City of Carlsbad; California Based on our field observations and attached Report of Field Density Tests (See Reference 2), it is our opinion that the soil engineering and engineering geologic aspects of the site grading are in accordance with the referenced geotechnical report (See Reference 5), local grading ordinances and the project grading plans. In addition, the footing excavations, soil expansion characteristics and soil bearing capacity are all in conformance with the approved plans and specifications. This opportunity to be of service is appreciated. If you have any questions, please do not hesitate to call or contact us. Respectfully Submitted, Mamadou Saliou iallo, P.E. RCE 54071, GE 2704 Attachment: References Final As-Graded Soil Report for Proposed Two-Story, Single-Family Residence 551 I Los Robles Drive Carlsbad, California 92008 REFERENCES Page2 August 21, 2025 Project No. 20-1126G3 1. "Observation of Foundation Excavations for Proposed Two-Story, Single-Family Residence, 5511 Los Robles Drive, Carlsbad, California 92008", Project No. 20-1106E6, Prepared by East County Soil Consultation and Engineering, Inc., Dated May 31, 2022. 2. "Report of Fill Compaction Tests for Proposed Two-Story, Single-Family Residence, 5511 Los Robles Drive, Carlsbad, California 92008", Project No. 20-1106E6, Prepared by East County Soil Consultation and Engineering, Inc., Dated April 13, 2022. 3. "Review of Foundation Drawings, Plans and Details for Proposed Two-Story, Single- Family Residence, 5511 Los Robles Drive, Carlsbad, California 92008", Project No. 20- 1106E6, Prepared by East County Soil Consultation and Engineering, Inc., Dated July 27, 2021. 4. "Response to Third-Party Geotechnical Review for Proposed Two-Story, Single-Family Residence, 5511 Los Robles Drive, Carlsbad, California 92008", Project No. 20-1106E6, Prepared by East County Soil Consultation and Engineering, Inc., Dated July 27, 2021. 5. "Geotechnical Investigation for Proposed Two-Story, Single-Family Residence, 5511 Los Robles Drive, Carlsbad, California 92008", Project No. 20-112603, Prepared by East County Soil Consultation and Engineering, Inc., Dated February 10, 2020. EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Arvin & Sepideh Matthew 215 Montclair Drive Danville, California 94526 EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. 10925 HARTLEY ROAD, SUITE "I" SANTEE, CALIFORNIA 92071 TEL. 619-258-7901 April 13, 2022 Project No. 20-l 126G3 Subject: Report of Fill Compaction Tests for Proposed Two-Story, Single-Family Residence 5511 Los Robles Drive Carlsbad, CA 92008 References: See Attached Dear Mr. & Mrs. Matthew: This report presents the results of fill compaction tests performed on the building pad for the proposed single-family r.esidence at the subject site. Site grading was conducted between March 14 and April 4, 2022 under the observation and testing of a representative of East County Soil Consultation & Engineering Inc. The subgrade soils within the building areas and to a distance of at least 5 feet outside building limits of the proposed single-family residence were removed to a depth of 2 feet and replaced with compacted fill . Fill soils consisting of on-site and imported silty sand were placed in 6 to 8-inch-thick lifts, moisture-conditioned to near optimum moisture content and compacted in excess of 90 percent relative compaction. Compaction was achieved with the aid of vibratory sheepsfoot roller. 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, Fill Compaction Test Results. Results of laboratory maximum density tests of the fill soils are presented on Table 2, Laboratory Maximum Density Test Results. The approximate field density/fill compaction test locations are shown on Figure 1. Report of Fill Compaction Tests for Proposed Two-Story, Single-Family Residence 5S11 Los Robles Drive Carlsbad, California 92008 Page2 April 13, 2022 Project No. 20-1126G3 Based on our field observations and fill compaction test results, it is our opinion that the grading and fill compaction were performed in accordance with the referenced geotechnical report (Reference No. 3) 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. , it-'.'· ou s_ a 1<<<' ~t E 2704 J J.,. J t-2 Mamadou Saliou Diallo, P.E. RCE 54071, GE 2704 MSD/md Attachments: Tables 1, 2 and Figure 1 and References EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Report of Fill Compaction Tests for Proposed Two-Story, Single-Family Residence 5511 Los Robles Drive Carlsbad, California 92008 TABLE 1 FILL COMPACTION TEST RESULTS TEST SOIL FILL FIELD FIELD MAXIMUM NO. TYPE DEPTH MOISTURE DRY DRY (FEET) CONTENT DENSITY DENSITY (%) <PCF) <PCF) 1 1 1 5 9.0 126.3 132 0 2 1 1.5 7.8 128.8 132.0 3 1 1.5 8.9 120.6 132.0 4 1 1.5 8.7 121.9 132.0 5 1 2FG 7.9 125.8 132.0 6 2 3 FG 5.7 128.7 135.0 7 2 3 FG 6.1 129.8 135.0 8 2 3 FG 4.2 125.2 135.0 FG = FINISHED GRADE TABLE 2 PageJ April 13, 2022 Project No. 20-1126G3 FILL COMPACTION (%) 96 98 91 92 95 95 96 93 LABORATORY MAXIMUM DENSITY TEST RESULTS ASTM D1557 SOIL SOIL MAXIMUM OPTJMUM TYP DESCRIPTION DRY DENSITY MOISTURE E (PCF) CONTENT (%) 1 DARK REDDISH BROWN, SILTY SAND 132.0 8.0 2 GRAY, SILTY SAND (IMPORT) 135.0 7.0 EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. Report of Fill Compaction Tests for Proposed Two-Story, Single-Family Residence 5511 Los Robles Drive Carlsbad, California 92008 FIGURE 1 Page 4 April 13, 2022 Project No. 20-1126G3 LOCATIONS Of FIELD DENSITY/FILL CO1\1PACTION TESTS EAST COUNTY SOIL CONSULTATION AND ENGINEERING, Th C. Report of Fill Compaction Tests for Proposed Two-Story, Single-Family Residence 5511 Los Robles Drive Carlsbad, California 92008 REFERENCES Pages April 13, 2022 Project No. 20-1126G3 1. "Review of Foundation Drawings, Plans and Details for Proposed Two-Story, Single- Family Residence, 5511 Los Robles Drive, Carlsbad, California 92008", Project No. 20- 1106E6, Prepared by East County Soil Consultation and Engineering, Inc., Dated July 27, 2021. 2. "Response to Third-Party Geotechnical Review for Proposed Two-Story, Single-Family Residence, 5511 Los Robles Drive, Carlsbad, California 92008", Project No. 20-1106E6, Prepared by East County Soil Consultation and Engineering, Inc., Dated July 27, 2021 . 3. "Geotechnical Investigation for Proposed Two-Story, Single-Family Residence, 5511 Los Robles Drive, Carlsbad, California 92008", Project No. 20-1126G3 , Prepared by East County Soil Consultation and Engineering, Inc., Dated February 10, 2020 . EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC.