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HomeMy WebLinkAboutCT 2018-0005; VILLAGE WALK; FINAL FOILS REPORT; 2021-07-18 STRATA-TECH, INC. 310. 968. 2999 G E O C O N S U L T A N T S stratatech@yahoo.com July 18, 2021 W.O. 284018 TMS Highland Investments, LLC Tony Sfreddo 29250 Paseo Sedano San Juan Capistrano, California tsfreddo@icloud.com Subject: Final As-Built Compaction Report, Multifamily Residential Development 341- 347 Oak Avenue, Carlsbad, California Reference: STRATA-TECH, INC., “Preliminary Geotechnical Engineering Investigation, Proposed Multi Family Residential Development, 341-347 Oak Avenue Drive, Carlsbad, California, W.O. 284018.1, 8 Dec 2020” Mr. Sfreddo: Submitted herewith is the Final As-Built Compaction Report for the subject site. The grading construction was conducted between March 16, 2020 and June 24, 2021, utilizing the recommendations of the referenced report. Observations of the grading were provided by STRATA-TECH, Inc. PLACEMENT OF STRUCTURAL FILL Compacted fill was placed on the subject site to provide adequate support for the proposed multifamily building. Once foundations were poured and as retaining walls built walls were water proofed, subdrains installed and backfilled with on site native soils. OBSERVATIONS DURING GRADING Preparation for placement of compacted fill included excavation to semi-subterranean pad grade and recompaction of two feet below 5-feet beyond the building foundation to provide a minimum TMS Highland Investments, LLC W.O. 284018 Final As-Built Compaction Report July 18, 2021 2 of 2 feet of compacted fill under the footings of the proposed building. Prior to placement of fill, the bottom was made level, scarified, watered and compacted. Subsequent fills were placed in 6 to 8 inch loose lifts and compacted to a minimum of 90 percent. IMPROVMENTS Utility services Water service May 2020 Sewer main and water installed in June – May-June2020. Fire water line in August 2020. Gas service line installed in April 2021. Street improvements in June 24, 2021 Interior utilities Sewer and water were backfilled with birds eye/ pea gravel to avoid damage from mechanical compaction. Foundations Foundations were excavated per plan and penetrate the bearing soils a min of 24”. Building foundations were observed before pouring of concrete with capillary break, 15mill visqueen, sand and steel ready for pour. Foundations were installed May-June 2020. TESTING Maximum density optimum moisture relationship determinations were performed for each soil type encountered during grading operations. Test results were as follows: Laboratory Standard: (ASTM: D-1557) 4-inch dia. mold; 1/30 cu.ft.vol.; 5 layers-25 blows per layer; 10 lb. hammer dropped 18 inches STRATA-TECH,INC. GE □C □NSULTANTS TMS Highland Investments, LLC W.O. 284018 Final As-Built Compaction Report July 18, 2021 3 Soil Type Classification Optimum Moisture % Max. Dry Density lbs/ft3 I Sand fn, silty, orange 10.3 127.0 Compaction tests were performed a minimum of every 2 feet and/or 500 cubic yards of compacted fill soils placed. These tests were performed in accordance with ASTM: D-2922 (nuclear gauge) or ASTM: D-1557 (sand cone) test methods. The test results are summarized in Table I. The approximate test locations are shown on Plate A. Areas not tested were probed to show adequate compaction. The observations and testing performed were the result of scheduling by the developer. REGULATORY COMPLIANCE All cuts, fills or processing of original ground under the purview of this report have been completed under the observation of and with selective testing by STRATA-TECH, Inc., and found to be in compliance with the Grading Code of the City of Carlsbad. The completed work has been observed by STRATA-TECH, Inc., and is considered adequate for the development. Our findings were made and recommendations prepared in accordance with generally accepted professional engineering practices, and no further warranty is implied nor made. This report is subject to review by the controlling authorities for this project. We appreciate this opportunity to be of service to you. Roland Acuña, PG Larry Finley, PE Principal RCE 46606 STRATA-TECH,INC. GE □C □NSULTANTS Respectfully submitted: STRATAwTECH, INC. TMS Highland Investments, LLC W.O. 284018 Final As-Built Compaction Report July 18, 2021 4 COMPACTION TEST RESULTS Test No. Location Below Proposed Grade (ft) Moisture Content % Dry Unit Weight (Lbs/ft3) Soil Type % Relative Compaction Date 1 Building Pad 1 9.8 118.0 I 91.5% 3-25-20 2 Building Pad 1 10.1 117.7 I 91.2% “ 3 Building Pad 2 10.1 119.2 I 92.4% 4 Building Pad 2 10.0 116.9 I 92.1% 3-26-20 5 Building Pad R.G. 9.4 119.3 I 92.5% 6 Building Pad R.G. 9.8 119.3 I 92.5% “ 7 See plan 2.5 9.7 112.0 I 90.3 6-20 8 “ 6.0 10.1 117.4 I 92.4 9 “ 3.5 11.0 116.9 I 92.1 10 “ 2 9.8 119.4 I 94.0 9-15-20 11 “ 6.5 10.8 118.7 I 93.6 12 “ 4 8.9 121.9 I 96.0 13 “ 2 11.5 123.4 I 97.2 14 “ 6 11.4 120.0 I 94.4 15 “ 4 9.7 121.9 I 96.1 16 “ 2 10.2 123.1 I 96.9 17 “ 1 9.3 122.0 I 96.0 18 “ SG 10.5 121.5 I 95.6 19 “ SG 9.9 120.9 I 95.2 20 “ SG 9.8 121.0 I 95.3 21 “ SG 11.1 121.5 I 95.6 22 “ SG 11.2 12O.8 I 95.1 23 “ SG 10.7 121.9 I 96. 24 “ SG 10.3 121.0 I 95.2 25 “ SG 10.6 122.0 I 96.0 R. G.: rough grade FG: finish grade G: gas W: water F: fore line S: sewer D: drive CG: curb gutters SG: subgrade STRATA-TECH,INC. GE □C □NSULTANTS STRATA-TECH, INC. 310. 968. 2999 G E O C O N S U L T A N T S stratatech@yahoo.com STRATA-TECH, INC. 310. 968. 2999 G E O C O N S U L T A N T S stratatech@yahoo.com July 18, 2021 W.O. 284018 TMS Highland Investments, LLC Tony Sfreddo 29250 Paseo Sedano San Juan Capistrano, California tsfreddo@icloud.com Subject: Final As-Built Compaction Report, Multifamily Residential Development 341- 347 Oak Avenue, Carlsbad, California Reference: STRATA-TECH, INC., “Preliminary Geotechnical Engineering Investigation, Proposed Multi Family Residential Development, 341-347 Oak Avenue Drive, Carlsbad, California, W.O. 284018.1, 8 Dec 2020” Mr. Sfreddo: Submitted herewith is the Final As-Built Compaction Report for the subject site. The grading construction was conducted between March 16, 2020 and June 24, 2021, utilizing the recommendations of the referenced report. Observations of the grading were provided by STRATA-TECH, Inc. PLACEMENT OF STRUCTURAL FILL Compacted fill was placed on the subject site to provide adequate support for the proposed multifamily building. Once foundations were poured and as retaining walls built walls were water proofed, subdrains installed and backfilled with on site native soils. OBSERVATIONS DURING GRADING Preparation for placement of compacted fill included excavation to semi-subterranean pad grade and recompaction of two feet below 5-feet beyond the building foundation to provide a minimum TMS Highland Investments, LLC W.O. 284018 Final As-Built Compaction Report July 18, 2021 2 of 2 feet of compacted fill under the footings of the proposed building. Prior to placement of fill, the bottom was made level, scarified, watered and compacted. Subsequent fills were placed in 6 to 8 inch loose lifts and compacted to a minimum of 90 percent. IMPROVMENTS Utility services Water service May 2020 Sewer main and water installed in June – May-June2020. Fire water line in August 2020. Gas service line installed in April 2021. Street improvements in June 24, 2021 Interior utilities Sewer and water were backfilled with birds eye/ pea gravel to avoid damage from mechanical compaction. Foundations Foundations were excavated per plan and penetrate the bearing soils a min of 24”. Building foundations were observed before pouring of concrete with capillary break, 15mill visqueen, sand and steel ready for pour. Foundations were installed May-June 2020. TESTING Maximum density optimum moisture relationship determinations were performed for each soil type encountered during grading operations. Test results were as follows: Laboratory Standard: (ASTM: D-1557) 4-inch dia. mold; 1/30 cu.ft.vol.; 5 layers-25 blows per layer; 10 lb. hammer dropped 18 inches STRATA-TECH,INC. GE □C □NSULTANTS TMS Highland Investments, LLC W.O. 284018 Final As-Built Compaction Report July 18, 2021 3 Soil Type Classification Optimum Moisture % Max. Dry Density lbs/ft3 I Sand fn, silty, orange 10.3 127.0 Compaction tests were performed a minimum of every 2 feet and/or 500 cubic yards of compacted fill soils placed. These tests were performed in accordance with ASTM: D-2922 (nuclear gauge) or ASTM: D-1557 (sand cone) test methods. The test results are summarized in Table I. The approximate test locations are shown on Plate A. Areas not tested were probed to show adequate compaction. The observations and testing performed were the result of scheduling by the developer. REGULATORY COMPLIANCE All cuts, fills or processing of original ground under the purview of this report have been completed under the observation of and with selective testing by STRATA-TECH, Inc., and found to be in compliance with the Grading Code of the City of Carlsbad. The completed work has been observed by STRATA-TECH, Inc., and is considered adequate for the development. Our findings were made and recommendations prepared in accordance with generally accepted professional engineering practices, and no further warranty is implied nor made. This report is subject to review by the controlling authorities for this project. We appreciate this opportunity to be of service to you. Roland Acuña, PG Larry Finley, PE Principal RCE 46606 STRATA-TECH,INC. GE □C □NSULTANTS Respectfully submitted: STRATAwTECH, INC. TMS Highland Investments, LLC W.O. 284018 Final As-Built Compaction Report July 18, 2021 4 COMPACTION TEST RESULTS Test No. Location Below Proposed Grade (ft) Moisture Content % Dry Unit Weight (Lbs/ft3) Soil Type % Relative Compaction Date 1 Building Pad 1 9.8 118.0 I 91.5% 3-25-20 2 Building Pad 1 10.1 117.7 I 91.2% “ 3 Building Pad 2 10.1 119.2 I 92.4% 4 Building Pad 2 10.0 116.9 I 92.1% 3-26-20 5 Building Pad R.G. 9.4 119.3 I 92.5% 6 Building Pad R.G. 9.8 119.3 I 92.5% “ 7 See plan 2.5 9.7 112.0 I 90.3 6-20 8 “ 6.0 10.1 117.4 I 92.4 9 “ 3.5 11.0 116.9 I 92.1 10 “ 2 9.8 119.4 I 94.0 9-15-20 11 “ 6.5 10.8 118.7 I 93.6 12 “ 4 8.9 121.9 I 96.0 13 “ 2 11.5 123.4 I 97.2 14 “ 6 11.4 120.0 I 94.4 15 “ 4 9.7 121.9 I 96.1 16 “ 2 10.2 123.1 I 96.9 17 “ 1 9.3 122.0 I 96.0 18 “ SG 10.5 121.5 I 95.6 19 “ SG 9.9 120.9 I 95.2 20 “ SG 9.8 121.0 I 95.3 21 “ SG 11.1 121.5 I 95.6 22 “ SG 11.2 12O.8 I 95.1 23 “ SG 10.7 121.9 I 96. 24 “ SG 10.3 121.0 I 95.2 25 “ SG 10.6 122.0 I 96.0 R. G.: rough grade FG: finish grade G: gas W: water F: fore line S: sewer D: drive CG: curb gutters SG: subgrade STRATA-TECH,INC. GE □C □NSULTANTS