HomeMy WebLinkAboutCDP 2016-0005; KLOVANISH RESIDENCE; FINAL SOILS REPORT; 2021-07-30
Project No 165564-1,4
Date: July 30, 2021
To: Crystal Hollins and Steve Klovanish
4422 Adams Street
Carlsbad, California 92023
Re: Proposed New Residence to be located at 4422 Adams Street, Carlsbad, California.
Subject: Final Summary Letter
Grading Plan Drawing No. 503-9A
Ref:
1. Geotechnical Investigation & Foundation Recommendations Proposed New Residence to be Located at
Adams Street (APN 206-180-4100), Carlsbad, California 92008, prepared by Engineering Design Group,
dated March 25th, 2016.
2. Plan Review Letter, prepared by Engineering Design Group, dated January 24, 2018.
3. Compaction report, prepared by Engineering Design Group, dated March 13, 2018
4. Plan Review Letter, prepared by Engineering Design Group, dated April 2, 2018
5. New Retaining Wall Letter, Prepared by Engineering Design Group, dated December 6, 2019
6. Footing Observation Letter, prepared by Engineering Design Group, dated September 5, 2019.
7. Compaction Report-Retaining Wall Backfill, Prepared by Engineering Design Group, dated October 30,
2019
8. Driveway Letter, prepared by Engineering Design Group, dated November 6, 2019
9. Pool Recommendations Letter, Prepared by Engineering Design Group, dated December 3, 2019
We have prepared this revised final summary letter, as requested by City of Carlsbad as part of project completion.
Onsite quality control services, provided by Engineering Design Group, are summarized in the above referenced
reports and inspections summaries. In our opinion the geotechnical conditions of the project summarized above,
are in general conformance with the recommendations of the project soils report, referenced above.
Respectfully Submitted,
ENGINEERING DESIGN GROUP
Steve Norris Erin E. Rist
GE #2590 RCE #65122
Attachments:
1. Compaction Report with Test Results and Figures
2. Compaction Report – Retaining Wall Backfill with Test Results and Figures
ENGINEERING
DESIGN GROUP
www.designgroupca.com
2121 Montiel Road, San Marcos, CA 92069
760.839.7302
Date: March 13, 2018
To: Crystal Hollins and Steve Klovanish
1635 Sandalwood Lane
Carlsbad, CA 92008
Re: Proposed new residence to be located at 4422 Adams Street, Carlsbad, California.
Ref: City of Carlsbad, Grading Plan 503-9A
Subject: Compaction Report – Rough Grade
INTRODUCTION
In accordance with your request and authorization we have provided limited earthwork observation and
compaction testing services during the rough grading at the above referenced site.
The results of our limited quality control and compaction testing operations performed to date are
summarized below. We understand the proposed improvements include the construction of a new
single family residence to be founded on deepened foundation systems and typical landscape and
hardscape improvements.
GRADING OPERATIONS
The scope of rough grading operations includes the creation of the building pad area as well as the
driveway and cut slope along Adams Street. The proposed structure is proposed with raised wood
floors, with concrete slabs on grade limited to the garage pad. In general rough grading for the building
pad consisted of; a cut to daylight at the rear portion of the building with foundations for the project
designed to consist of foundations deepened to competent material; the formation of an equipment
access pad area was created to allow drilling equipment to access the front portions of the house as part
of rough grading. trenching for electrical and cable service lines at the property to the north.
In the area of the main building pad, grading included the removal of fill and weathered soil profiles to
competent sandstone. In the area of the proposed new garage slab on grade floors, loose fill and
weathered profiles were removed and the cut portion of the slab was undercut to a depth of
approximately 1 foot. Removal bottom in the area of the garage pad was ripped and moisture
conditioned and new fill material recompacted to slab subgrade. In the area of the equipment access
pad, a keyway was extended into competent sandstone material approximately 2 feet at the toe of the
new slope; the keyway was canted inward and scarified to a depth of 12-18 inches and moisture
conditioned. Onsite fills were placed and recompacted for the creation of the new equipment access
pad.
Onsite soils were utilized as graded fill and trench backfill. Prior to recompaction, soils were generally
cleaned of vegetative and other debris and moisture conditioned. Onsite soil consisted of a range of
2121 Montiel Road, San Marcos, CA 92069
760.839.7302
light brown to brown to grey, loose to medium dense, silty sands, sandy silts and clayey sands. Based
upon our visual observation onsite soils possess potential for expansion in the low to medium range.
Soil was moisture conditioned with a fire hose and placed utilizing a combination of Kamatsu HB 215
Excavator, TX 650 Loader and a CAT CP-323C with sheep foot roller.
ADDITIONAL RECOMMENDATIONS
At the time of preparation of this report, we understand potential design changes have been proposed
for the lower portion of the site in the area of the equipment access pad. Additional recommendations
may be necessary upon review of these changes.
FIELD AND LABORATORY TESTING
Limited field density tests were performed in accordance with D2922 (Nuclear Gauge Method). Our test
results indicate that, in the locations tested, soils have been compacted to at least 90% relative
compaction, as determined by ASTM D1557, (Procedure A). The reported test results are representative
of the soil conditions at the locations tested. Our observation and field density testing methods are in
accordance with normally accepted procedures. The accuracy of the relative compaction values is
subject to the precision limitations of the ASTM test methods. The accuracy of the maximum dry density
determination (ASTM D1557) is discussed in the Annual Book of ASTM Standards, Section 4, Volume
04.08, entitled, Soil and Rock; Building Stones. Variations of relative compaction values should be
expected, laterally and vertically, from actual test locations.
TESTING SUMMARY
In general, it is our opinion, based on the placement procedure and the test data collected, the fill soils
tested, at the locations tested, were compacted to a minimum of 90% relative compaction (based on
ASTM D1557, Procedure A).
If you have any questions regarding this report, or if we can be of further service, please do not hesitate
to contact us. We hope the report provides you with the necessary information to continue with the
development of the project.
Sincerely,
ENGINEERING DESIGN GROUP
Erin Rist Steven B. Norris
California RCE# 65122 California GE# 2590
Attachments:
1) Table 1 & 2: “Laboratory and Field Test Results”
2) Figure 1: “Approximate Location of Compaction Tests”
LABORATORY AND FIELD TEST RESULTS
TABLE NO. 1
Laboratory Test Results
SOIL
TYPE
(#)
SOIL TYPE
MAXIMUM DENSITY
(PCF)
OPTIMUM
MOISTURE
(%)
U.S.C.S.
CLASSIFICATION
1
Dark Reddish Brown
Silty Sand - ONSITE 125.8 9.7 SM-SW
2
Dark Brown to Grey
Clayey Sand-ONSITE 114.9 14.4 SC-SM
TABLE NO. 2
TEST
NO.
DATE ELEVATION SOIL
TYPE
(#)
DRY
DENSITY
(PCF)
FIELD
MOISTURE
(%)
RELATIVE
COMPACTION
(%)
COMMENT
1 3/1/2018 98' 2 102.7 19.5 89 RETEST 2
2 3/1/2018 98' 2 105.4 18.7 92
3 3/1/2018 98' 2 107.1 17.2 93
4 3/2/2018 100' 2 104.5 16.2 91
5 3/2/2018 100' 2 103.9 16.1 90
6 3/2/2018 100' 2 108.2 16.4 94
7 3/5/2018 102.5' 2 108.4 17.0 94
8 3/5/2018 102.5' 2 117.1 6.9 91
9 3/5/2018 102.5' 2 113.2 15.1 99
10 3/5/2018 118' 1 119.5 14.9 95
11 3/5/2018 118' 1 118.0 14.8 94
12 3/5/2018 104' 2 103.0 16.0 90
13 3/5/2018 104 2 99.3 14.2 86 RETEST 14
14 3/5/2018 104' 2 105 14 91
15 3/5/2018 FP 1 116.1 10.4 92
16 3/5/2018 FP 1 115.2 9.2 92
17 3/6/2018 105' 2 105.3 15.2 92
TEST
NO.
DATE ELEVATION SOIL
TYPE
(#)
DRY
DENSITY
(PCF)
FIELD
MOISTURE
(%)
RELATIVE
COMPACTION
(%)
COMMENT
18 3/6/2018 105' 2 104.4 19 91
19 3/7/2018 FG 1 115.2 8 92
20 3/7/2018 FG 1 118.1 9.2 94
21 3/9/2018 +2 F/BTM 1 111.3 6.7 88 RETEST 22
22 3/9/2018 +2 F/BTM 1 114.7 11.6 91
23 3/9/2018 +2 F/BTM 1 122.0 9.2 97
24 3/9/2018 +3.5 F/BTM 1 120.6 13 96
25 3/9/2018 +3.5 F/BTM 1 108.7 10.3 86 RETEST 26
26 3/9/2018 +3.5 F/BTM 1 116.3 8.8 93
FIGURE 1
Approximate Location of Compaction Test
Project: Hollins –Klovanish Residence
Address: Adams Avenue, Carlsbad, California
EDG Project No:165564-1
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NOT TO SCALE
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●9
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●6 ●14
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ENGINEERING
DESIGN GROUP 2121 Montiel Road, San Marcos, CA 92069
760.839.7302
... ____ _,,,.-"'
ARC.eL PM 79
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NOTTO SCALE
FIGURE 1
Approximate Location of Compaction Test
Project: Hollins –Klovanish Residence
Address: Adams Avenue, Carlsbad, California
EDG Project No:165564-1
NOT TO SCALE
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●23
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ENGINEERING
DESIGN GROUP
www.designgroupca.com
2121 Montiel Road, San Marcos, CA 92069
760.839.7302
EDG Project No. 165564-1,4
Date: October 30, 2019
To: Crystal Hollins and Steve Klovanish
4422 Adams Street
Carlsbad, California 92008
Re: Proposed new residence to be located at 4422 Adams Street, Carlsbad, California.
Subject: Compaction Report – Retaining Wall Backfill
INTRODUCTION
In accordance with your request and authorization we have provided limited earthwork observation and
compaction testing services during the backfill of the new retaining wall located west of new building
pad at the above referenced site.
The results of our limited quality control and compaction testing operations are summarized below. We
understand the proposed improvements include the construction of a new residence with typical
landscape and hardscape improvements.
BACKFILL OPERATIONS
The scope of retaining wall backfill operations for this project consisted of backfilling and compaction of
onsite soils for the newly constructed retaining wall located to the west of new building pad. Backfill
operations were conducted during October 2019. Back fill operations also consisted of backfilling and
compaction of onsite and import material as part of slope reconstruction between retaining wall and top
of slope.
Onsite and import soil materials were utilized as fill. Prior to compaction, soils were generally cleaned of
rocks in excess of 6” in diameter, vegetative and other debris and moisture conditioned. Onsite soil
consisted of a range of light brown to brown to grey silty sands, sandy silts and clayey sands. Based upon
Import soils consisted of brown to light brown, silty sands, sandy silts and clayey sands. Based on our
visual observation and experience, import soils possess potential for expansion in the low range. Soil
was moisture conditioned with a fire hose and placed utilizing a loader and compacted using a Bomag
roller and motor driven wacker.
ENGINEERING
DESIGN GROUP
www.designgroupca.com
2121 Montiel Road, San Marcos, CA 92069
760.839.7302
EDG Project No. 165564-1,4
FIELD AND LABORATORY TESTING
Limited field density tests were performed in accordance with D2922 (Nuclear Gauge Method). Our test
results indicate that, in the locations tested, soils have been compacted to at least 90% relative
compaction, as determined by ASTM D1557, (Procedure A). The reported test results are representative
of the soil conditions at the locations tested. Our observation and field density testing methods are in
accordance with normally accepted procedures. The accuracy of the relative compaction values is
subject to the precision limitations of the ASTM test methods. The accuracy of the maximum dry density
determination (ASTM D1557) is discussed in the Annual Book of ASTM Standards, Section 4, Volume
04.08, entitled, Soil and Rock; Building Stones. Variations of relative compaction values should be
expected, laterally and vertically, from actual test locations.
TESTING SUMMARY
In general, it is our opinion, based on the placement procedure and the test data collected, the fill soils
tested, at the locations tested, were compacted to a minimum of 90% relative compaction (based on
ASTM D1557, Procedure A).
If you have any questions regarding this report, or if we can be of further service, please do not hesitate
to contact us. We hope the report provides you with the necessary information to continue with the
development of the project.
Sincerely,
ENGINEERING DESIGN GROUP
Erin Rist Steven B. Norris
California RCE# 65122 California GE# 2590
Attachments:
1) Table 1 & 2: “Laboratory and Field Test Results”
2) Figures 1 & 2: “Approximate Location of Compaction Tests”
EDG Project No. 165564-1,4
LABORATORY AND FIELD TEST RESULTS
TABLE NO. 1
Laboratory Test Results
SOIL
TYPE
(#)
SOIL TYPE
MAXIMUM DENSITY
(PCF)
OPTIMUM
MOISTURE
(%)
U.S.C.S.
CLASSIFICATION
1
Brown Silty Clayey Sand
ONSITE 114.9 14.9 SM - SC
2
Light Brown Silty Clayey
Sand
IMPORT
129.6 9.2 SM - SC
TABLE NO. 2
Field Test Results
TEST
NO. DATE ELEVATION
SOIL
TYPE
(#)
DRY
DENSITY
(PCF)
FIELD
MOISTURE
(%)
RELATIVE
COMPACTION
(%)
COMMENT
1 10/3/2019 99' 1 109.8 16.1 96
2 10/3/2019 99' 1 111.0 14.9 97
3 10/3/2019 99' 1 107.6 15.6 94
4 10/4/2019 101' 1 107.1 13.1 93
5 10/4/2019 101' 1 103.1 13.6 90
6 10/4/2019 101' 1 109.9 14.1 96
7 10/9/2019 103' 1 106.0 12.6 92
8 10/9/2019 103' 1 110.7 12.0 96
9 10/9/2019 103' 1 117.4 11.7 102
10 10/10/2019 105' 1 105.5 9.4 92
11 10/10/2019 105' 1 109.7 11.1 95
12 10/10/2019 105' 1 104.0 12.6 91
13 10/11/2019 FG 2 116.5 11.1 90
14 10/11/2019 FG 2 116.2 9.6 90
FIGURE 1
Approximate Location of Compaction Test
Project: Hollins –Klovanish Residence
Address: 4422 Adams Avenue, Carlsbad, California
EDG Project No:165564-1,4
●1
●3
●5 ●2 ●4
NOT TO SCALE
●13
●12 ●11 ●10
●9
●8 ●7
●6
●14
ENGINEERING
DESIGN GROUP
www.designgroupca.com
2121 Montiel Road, San Marcos, CA 92069
760.839.7302
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NOTTO St L