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Home My WebLink AboutCT 13-02; COASTAL 10; REPORT OF FIELD DENSITY TESTS; 2016-10-06EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. 10925 HARTLEY ROAD, SUITE "I" SANTEE, CALIFORNIA 92071 (619) 258-7901 Fax 258-7902 Mr. Briqn Merritt Diversified Development 7668 El Camino Real, 104-280 Carlsbad, California 92009 October 6, 2016 Project No. 12-1 147G1 Report of Field Density Tests Retaining Wall Backfill & Driveway Proposed 10-Unit Residential Development (Coastal Living 10) Lot 40 of La Costa South, Unit No. 1 Navarra Drive, Carlsbad, California 92009 See Attached Dear Mr. Merritt- This report presents the results of field density tests performed on the retaining wail backfill and the subgrade of the private driveway for the proposed residential development at the subject site In accordance with your request, in-place field density tests were performed in accordance with ASTM 1)1556 (Sand Cone Method). Backfill and grading were conducted between March 20, 2015 and February 24, 2016 under the observation and testing of a representative of East County Soil Cdnsultation and Engineering, Inc. The results of the field density tests are presented on Page T-1 under "Table of Test Results". The laboratory determinations of the maximum dry densities and optimum moisture contents of the fill 1soils are set forth on Page L-1 under "Laboratory Test Results". The approximate test locations are shown on Plate No. 1. fill soils primarily consisting of silty sand were placed in thin lifts and compacted in excess )f minimum of 90 percent relative compaction while maintaining a moisture content y around optimum. Compaction was achieved with the use of a hand whacker and a eel roller.. DIVE1SIFjtED DEVELOPMENT! COASTAL LIVING 10 PROJECTNO. 12-1147G1 If we can be of further assistance, please do not hesitate to contact our office. Pages Til, L4, Plate No. I and References Are attached. RespectIully Submitted, GE 2704 EXR / A 1* Mamadu Saliou Diallo, P.E RCE 5471, GE 2704 2 DIVERSJ ED DEVELOPMENT! COASTAL LIVING 10 FROJECTNO. 12-1147G1 PAGE T-1 TABLE OF TEST RESULTS ASTM D1556 DEPTH FIELD DRY MM DRY TEST SOIL OF FILL $IOISTURE DENSITY DENSITY PERCENT NO TYPE IN FEET 'ODRY 'NT. P.C.F. P.C.F COMPACTION 1 1 2 10.5 127.5 132.0 97 2 2 2 8.4 121.5 130.0 93 3 1 4 7.0 120.3 132.0 91 4 1 4 7.3 124.8 132.0 95 5 1 6 8.0 129.4 132.0 98 6 1 6 9.8 126.7 132.0 96 7 2 2 7.1 126.8 130.0 98 8 2 4 7.4 126.5 130.0 97 9 1 4 8.5 127.9 132.0 97 10 2 4FG 8.8 126.1 130.0 97 11 2 8 10.1 120.8 130.0 93 12 2 8 9.4 121.8 130.0 94 13 2 10FG 10.7 123.4 130.0 95 14 2 10FG 9.6 122.2 130.0 94 15 1 FSG 6.8 126.8 132.0 96 16 2 FSG 9.6 124.7 130.0 96 17 1 FSG 9.7 126.4 132.0 96 18 1 FSG 10.0 131.3 132.0 99 FG = FIIt4ISH GRADE FSG = FINISH SUBGRADE DlVERSIIIED DEVELOPMENT! COASTAL LIVING 10 PROJECTNO. 12-1147G1 PAGE 1-,1 LABORATORY TEST RESULTS RESULTS OF MAXIMUM DENSITY AND OPTIMUM MOISTURE The maimum dry densities and optimum moisture contents of the fill materials as determined by ASTM D1557, Procedures A and B which use 25 blows of a 10-pound slide hammer falling from a height of 18 inches on each of 5 equal layers in t44nch diameter 1/30 cubic foot compaction cylinder and Procedure C which uses 56 blows of a 10-pound slide hammer falling from a height of 18 inches on each of 5 equal layers Inca 6-inch diameter 1/13.3 cubic foot compaction cylinder are presented as follows: •- •'• -. f Lv.LW I I 7 4 i•*. b EAST COUNTY SOIL CONSULTATION - 10925 RDSIflThLSANTEE. CA 92071 (6I.~ ARTLEY 258-7901 Fax (619) 258-7902 10OWg4) 4F /Lt tf31/77J' 7S7 '• T II / DIVERSIFIED DEVELOPMENT! COASTAL LIVING 10 PROJECTNO. 12-i 147G1 REFERENCES Pervious Concrete Paver Section Recommendations, Proposed 10-Unit Residential Development (Coastal Living 10), Units 6 and 7, Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-1 147G1, Prepared by East County Soil Consultation and Engineering, Inc., Dated November 19,2015. 'Foundation Excavation Observation, Proposed 10-Unit Residential Development (Coastal Living 10), Units 6 and 7, Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project 1(o. 12-1147(31, Prepared by East County Soil Consultation and Engineering, Inc., Dated May 6, 2015. 'Foundation Excavation Observation, Proposed 10-Unit Residential Development (Coastal Living 10), Units 8 Through 10, Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-1147G1, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 31, Foundation Excavation Observation, Proposed 10-Unit Residential Development (Coastal Living 10), Units 1 Through 5, Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-1147(31, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 31, 015. . 'Caisson Foundation Excavation Observation, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12- 147(31, Prepared by East County Soil Consultation and Engineering, Inc., Dated February 26, 2015. 1Foundation Excavation Observation, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-1147(31, Prepared by East County Soil Consultation and Engineering, Inc., Dated February 5, 2015. 'Report of Field Density Tests, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of Costa South, Unit No. I, Navarra Drive, Carlsbad, California 92009", Project No. 12-1147G1, Prepared by East County Soil Consultation and Engineering, Inc., Dated February 5, 2015. "Permanent Shoring Excavation Observation, Proposed 10-Unit Residential Development (Coastal Living JIO), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12- 1147G1, Prepared by East County Soil Consultation and Engineering, Inc., Dated November 14, 2014. j'Foundation Plans and Details Review, Proposed 10-Unit Residential Development (Coastal Living 10), tot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-1147(31, IPrepared by East County Soil Consultation and Engineering, Inc., Dated July 15, 2014. 10 "Shoring Design, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-1147G I, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 19, 2014. Ii. "Limited Geotechnical Investigation, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-1147(31, Prepared by East County Soil Consultation and Engineering, Inc., Dated January 10, 2013. 5 EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC. 10925 HARTLEY ROAD, SUITE "I" SANTEE, CALIFORNIA 92071 (619) 258-7901 Fax 258-7902 Mr. Brian Merritt February 5, 2015 Diversified Development Project No. 12-1 147G1 7668 El Camino Real, 104-280 Carlsbad, California 92009 Subject: Report of Field Density Tests Proposed 10-Unit Residential Development (Coastal Living 10) Lot 40 of La Costa South Unit No. I Navarra Drive, Carlsbad, California 92009 References: See Attached Dear Mr. Merritt: This report presents the results of field density tests performed on the buildi n g p a d s f o r t h e proposed residential development at the subject site. In accordance with your request, in-place field density tests were performed in accord a n c e w i t h ASTM D1556 (Sand Cone Method). Grading was conducted between August 1, 2014 and February 4, 2015 under the observation and testing of a representative of E a s t C o u n t y S o i l Consultation and Engineering, Inc. The results of the field density tests are presented on Page T-1 under "Table of T e s t R e s u l t s " . The laboratory determinations of the maximum dry densities and optimum moi s t u r e c o n t e n t s o f the fill soils are set forth on Page L-1 under "Laboratory Test Results". The a p p r o x i m a t e t e s t locations are shown on Plate No. 1. Following clearing and grubbing, i.e. the removal of vegetation and delete r i o u s m a t e r i a l s , subgrade soils were overexcavated at least 4 feet below proposed fmished pad gr a d e s . T h e bottom of the excavation was scarified to a depth of approximately 6 inches , m o i s t u r e conditioned and recompacted. On-site fill soils predominantly consisting of silty sand with gravel were placed in t h i n l i f t s a n d compacted to a minimum of 90 percent relative compaction while maintaining a m o i s t u r e c o n t e n t generally over optimum. Compaction was achieved with the use of a Caterpill a r 9 6 6 G l o a d e r and a Caterpillar DH tractor. DIVERSIFIED DEVELOPMENT/ COASTAL LIVING 10 PROJETNO. 12-1]47G1 Based on our field observations and density test results, it is our opinion that the gr a d i n g operation for the proposed residential development was performed in accordance with the referenced geotechnical report (Reference No 4) and local grading ordinances If we can be of further assistance, please do not hesitate to contact our office. Pages T- 1, L-1 and Plate No. 1 are attached. Respectfully Submitted, Mamadou Saliou Diallo, P.R. RCE 54071, GE 2704 MSD/md 2 DIVERSIFIED DEVELOPMENT! COASTAL LIVING JO PROJECTNO. 12-1147G1 PAGE T-1 TABLE OF TEST RESULTS ASTM D1556 DEPTH FIELD DRY MAXIMUM DRY TEST SOIL OF FILL MOISTURE DENSITY DENSITY PERCENT TYPE IN FEET %DRY WT. P.C.F. P.C.F COMPACTION 1 1 2 7.6 129.5 132.0 98 2 1 2 8.3 122.2 132.0 93 3 1 2 8.0 123,9 132.0 94 4 1 2 9.1 124.8 132.0 95 5 1 2 9.8 128.3 132.0 97 6 1 3 7.9 123.8 132.0 94 7 1 2 8.1 121.8 132.0 92 8 1 4 9.2 123.8 132.0 94 9 1 6 10.7 124.5 132.0 94 10 1 4 7.8 126.3 132.0 96 11 1 2 6.0 121.6 132.0 92 12 2 2 9.0 124.3 130.0 96 13 2 2 8.2 119.3 130.0 92 14 1 2 11.2 125.2 132.0 95 15 2 2 11.0 120.1 130.0 92 16 1 2 7.2 123.7 132.0 94 17 1 4FG 9.6 123.4 132.0 93 18 2 4FG 10.2 122.7 130.0 94 19 1 4FG 11.2 122.5 132.0 93 20 1 4FG 9.4 121.4 132.0 92 REMARKS 3 DIVERSIFIED DEVELOPMENT! COASTAL LIVING JO PROJECTIVO. 12-I147GJ PAGE T-1 (Continued) TABLE OF TEST RESULTS ASTM D1556 DEPTH FIELD DRY MAXIMUM DRY TEST SOIL OF FILL MOISTURE DENSITY DENSITY PERCENT NO. TYPE IN FEET %DRY WT. P.C.F. P.C.F COMPACTION 21 2 4FG 9.9 121.7 130.0 94 22 2 4FG 10.7 119.8 130.0 92 23 1 8FG 9.4 121.5 132.0 92 24 1 6FG 9.1 124.3 132.0 94 25 3 2 13.8 115.8 127.0 91 26 3 2 12.8 119.0 127.0 94 27 1 2 8.9 121.3 132.0 92 28 3 2 12.1 117.9 127.0 93 29 3 4FG 12.9 120.4 127.0 95 30 3 4FG 12.6 120.0 127.0 94 31 3 4FG 14.2 114.5 127.0 90 REMARKS FG = FINISH GRADE DIVERSIFIED DE VELOPMEWT/ COASTAL LIVING 10 PROJECT NO. I2-I147G1 PAGE L-1 LABORATORY TEST RESULTS RESULTS OF MAXIMUM DENSITY AND OPTIMUM MOISTURE The maximum dry densities and optimum moisture contents of the fill materials as determined by ASTM D1557, Procedures A and B which use 25 blows of a 10-pound slide hammer falling from a height of 18 inches on each of 5 equal layers in a 4-inch diameter 1/30 cubic foot compaction cylinder and Procedure C which uses 56 blows of a 10-pound slide hammer falling from a height of 18 inches on each of 5 equal layers in a 6-inch diameter 1/13.3 cubic foot compaction cylinder are presented as follows OPTIMUM MAXIMUM MOISTURE SOIL TYPE! DRY DENSITY CONTENT PROCEDURE DESCRIPTION LB/ CU. FT. % DRY WT. 1/C REDDISH BROWN SILTY SAND 132.0 7.8 WITH GRAVEL 2/A TAN! REDDISH BROWN SILTY SAND 130.0 8.3 3/A TAN BROWN SILTY SAND 127.0 103 WITH A TRACE OF CLAY 5 -;-••_ RRAD _ 46 - Me 1iV6(7Y77 EAST COUNTY SOIL CONSULTATION & ENGINEERING, INC. 10925 HARTLEY RD., SUITE I. SANTEE. CA 92071 (619) 259.7901 Fax (619) 258.7902 - i? 4-7 lV*7 77 • Z3. DIVERSIFIED DEVELOPMENT! COASTAL LIVING 10 PROJECT NO. 12-1147G1 REFERENCES "Permanent Shoring Excavation Observation, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-114701, Prepared by East County Soil Consultation and Engineering, Inc., Dated November 14, 2014. "Foundation Plans and Details Review, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-114701, Prepared by East County Soil Consultation and Engineering, Inc., Dated July 15,2014. "Shoring Design, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-114701, Prepared by East County Soil Consultation and Engineering, Inc., Dated March 19, 2014 "Limited Geoteôhnical Investigation, Proposed 10-Unit Residential Development (Coastal Living 10), Lot 40 of La Costa South, Unit No. 1, Navarra Drive, Carlsbad, California 92009", Project No. 12-1147G1, Prepared by East County Soil Consultation and Engineering, Inc., Dated January 10, 2013. 19