HomeMy WebLinkAboutCDP 2018-0019; SNYDER RESIDENCE; FINAL SOILS REPORT; 2020-10-01Final As-Graded Soil Report for Proposed Single-Famil)' Residence
1781 Skimmer Court
Carlsbad, California 92008
REFERENCES
Page 2
October 1, 2020
Project No. 18-1127E5
1. "Foundation Excavation Observation, Proposed Single-Family Residence, 1781 Skimmer Court,
Carlsbad, California 92011", Project No. 18-l 127E5, Prepared by East County Soil Consultation and
Engineering, Inc., Dated September 3, 2019.
2. "Report of Field Density Tests, Proposed Single-Family Residence, 1781 Skimmer Court, Carlsbad,
California 92011", Project No. 18-l 127E5, Prepared by East County Soil Consultation and
Engineering, Inc., Dated July 30, 2019.
3. "Response to City of Carlsbad Issues of Concern, Proposed Single-Family Residence, 178 l Skimmer
Court, Carlsbad, California 92011", Project No. 18-1127£5, Prepared by East County Soil
Consultation and Engineering, Inc., Dated February 26, 2019.
4. "Foundation Plan and Details Review, Proposed Single-Family Residence, 1781 Skimmer Court,
Carlsbad, California 92011"', Project No. 18-1127E5, Prepared by East County Soil Consultation and
Engineering, Inc., Dated April 4, 2018.
5. "Limited Gcotcchnical Investigation, Proposed Single-Family Residence, 1781 Skimmer Court,
Carlsbad, California 92011", Project No. 18-l 127E5, Prepared by East County Soil Consultation and
Engineering, Inc., Dated March 1, 2018.
EAST COUNTY SOIL CONSULTATION AND ENGINEERING, INC.
James M. Snyder
I 0612 Prospect A venue
Santee, California 92071
EAST COUNTY SOIL CONSULTATION
AND ENGINEERING, INC.
10925 HARTLEY ROAD, SUITE "I"
SANTEE, CALIFORNIA 92071
(619) 258-7901
Fax 258-7902
Subject: Report of Field Density Tests
Proposed Single-Family Residence
1781 Skimmer Court
Carlsbad, California 92011
References: See Attached
Dear Mr. Snyder:
July 30, 2019
Project No. 18-1127E5
This is to present the results of field density tests performed on the building pad for the proposed
two-story, single-family residence at the subject site.
In accordance with your request, in-place field density tests were performed in accordance with
ASTM Dl556 (Sand Cone Method). Grading was conducted between July 16 and 26, 2019
under the observation and testing of a representitive of East County Soil Consultation &
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 soils are set forth on Page L-1 under "Laboratory Test Results". The approximate test
locations are shown on Plate No. 1.
Following clearing and grubbing, i.e. the removal of vegetation, concrete waste and debris from
the demolition of the existing slab, subgrade soils were overexcavated to a depth of
approximately 3 feet below existing grade. The bottom of the excavation was scarified and
compacted. In addition, the fill slope on the east side of the building was was properly keyed
and benched during grading.
On-site and imported fill soils cons1stmg of silty sand were placed in thin lifts, moisture-
conditioned around optimum and compacted in excess of 90 percent relative compaction.
Compaction was achieved with the use of a John Deere 755 K trackloader.
DEPTH
TEST SOIL OFFILL
NO. TYPE IN FEET
1 1 1.5
2 1 1.5
3 1 1.5
4 l l.5
5 1.5
6 2
7 1 4
8 1 6FG
9 2 3 FG
10 2 3 FG
11 2 3 FG
12 2 3 FG
James M. Snyder! 1781 Skimmer Court/ Carlsbad Project No. 18-1127£5
PAGE T-1
TABLE OF TEST RESULTS
ASTMD1556
MAXIMUM
FIELD DRY DRY
MOISTURE DENSITY DENSITY
%DRY WT. P.C.F. P.C.F
16.2 106.1 115.0
16.4 110.6 115.0
13.3 111 .9 115.0
13.2 109.7 115.0
14.6 110.2 115.0
11.3 108.7 115.0
15.5 11 l.7 115.0
14.2 110.6 115.0
6.8 112.6 118.0
7.3 114.6 118.0
7.0 113.6 118.0
6.6 112.6 118.0
FG = FINISH GRADE
3
PERCENT
COMPACTION
92
96
97
95
96
95
97
96
95
97
96
95
REMARKS
James M Snyder/ 1781 Skimmer Court/ Carlsbad Project No. 18-1127£5
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
D 1557, 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 I 0-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/A LIGHT BROWN SILTY SAND I 15.0 12.0
2/A REDDISH BROWN SIL TY SAND 118.0 9.5
(IMPORT)
4
James M Snyder! 1781 Skimmer Court/ Carlsbad Project No. 18-1 I 27£5
REFERENCES
1. "Response to City of Carlsbad Issues of Concern, Proposed Single-Family Residence, 1781
Skimmer Court, Carlsbad, California 9201 I", Project No. 18-1127E5, Prepared by East County
Soil Consultation and Engineering, Inc., Dated February 26, 2019.
2. "Foundation Plan and Details Review, Proposed Single-Family Residence, 1781 Skimmer Court,
Carlsbad, California 92011", Project No. 18-l 127E5, Prepared by East County Soil Consultation
and Engineering, Inc., Dated April 4, 2018.
3. "Limited Geotechnical Investigation, Proposed Single-Family Residence, 1781 Skimmer Court,
Carlsbad, California 92011 ", Project No. 18-l 127E5, Prepared by East County Soil Consultation
and Engineering, Inc., Dated March I, 2018.
5