HomeMy WebLinkAboutPD 2018-0031; HUELSEBUSCH RESIDENCE; FINAL SOILS REPORT; 2019-10-29EAST COUNTY SOIL CONSULTATION
AND ENGINEERING, INC.
10925 HARTLEY ROAD, SUITE "I"
SANTEE, CALIFORNIA 92071
(619) 258-7901
Fax 258-7902
Melody Huelsebusch October 29, 2019
Project No. 18-1106E4 l 33 l Knowles A venue
Carlsbad, California 92008
Subject: Report of Field Density Tests
Proposed Single-Family Residence
I 33 l Knowles A venue
City of Carlsbad, California 92008
References: I. "Foundation Plan and Details Review, Proposed Single-Family Residence, 1331
Knowles A venue, City of Carlsbad, California 92008", Project No. 18-1106E4,
Prepared by East County Soil Consultation and Engineering, Inc., Dated October
11 ,2019.
2. "Limited Geotechnical Investigation, Proposed Single-Family Residence, 133 l
Knowles Avenue, City of Carlsbad, California 92008", Project No. 18-1106E4,
Prepared by East County Soil Consultation & Engineering Inc., Dated July 12,
2018.
Dear Ms. Huelsebusch:
This report presents the results of field density tests perfonned on the building pad for the
proposed 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 October 15 and 18, 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 residence, subgrade soils were overexcavated to a depth of
approximately 3 feet below existing grade. The bottom of the excavation was scarified and
compacted.
Melody Huelsebusch./1331 Knowles Avenue/ Carlsbad Project No. 18-1106E4
On-site soils consisting of silty sand were placed in thin lifts and compacted in excess of 90
percent relative compaction while maintaining a moisture content around optimum. Compaction
was achieved with the use of a Caterpillar 963B tractor.
Based on our field observations and density test results, it is our op1mon that the grading
operation for the proposed single-family residence was performed in accordance with the
referenced geotechnical report and local grading ordinances.
If we can be of further assistance, please do not hesitate to contact our office.
Page T-1 , L-1 and Plate No. I are parts of this report.
Respectfully Submitted,
2
TEST SOIL
NO. TYPE
2
3 I
4 2
5 2
6
7 2
8
9
A,fe/ody H11elseb11sch.ll 33 J Knowles Avenue/ Carlsbad Project No. /8-1106E4
DEPTH
OFFILL
IN FEET
I
1.5
2
2
2.5
3.5 FG
3.5 FG
3.5 FG
PAGE T-1
TABLE OF TEST RESULTS
ASTMD1556
MAXIMUM
FIELD DRY DRY
MOISTURE DENSITY DENSITY
%DRY WT. P.C.F. P.C.F
8.5 127.3 133.0
8.5 130.6 133.0
8.1 123.8 133 .0
7.7 123.1 130.0
7.7 124.6 130.0
8.5 125.5 133.0
7.8 122.4 130.0
8.3 130.0 133.0
7.3 126.3 133.0
FG = FINISH GRADE
3
PERCENT
COMPACTION
96
98
93
95
96
94
94
98
95
REMARKS
Melody Hue/sebusch./133 I Knowles Avenue/ Carlsbad Project No. 18-1106E4
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
DI557, Procedures A and 8 which use 25 blows of a IO-pound slide hammer falling from a height of 18
inches on each of 5 equal layers in a 4-inch diameter I /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. ¾DRY WT.
I/A REDDISH BROWN SILTY SAND 133 .0 8.5
2/A DARK BROWN SIL TY SAND 130.0 9.0
4
EAST COUNTY SOIL CONSULTATION
& ENGTh"EERING. INC.
10925 HARTLEY RD., SUITE I
S,UITEE, CA92071
GEOTECHNICAL ENGINEERING
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