HomeMy WebLinkAboutTract Map 3883 Lot 544 Field Density Testing
REPORT of OBSERVATION
and FIELD DENSITY TESTING
for RESIDENTIAL GRADING
l
Lot 544; TR 3883
Temecula, CA
August 21, 2000
Prepared for:
Mr. and Mrs. Joe Viselli
30845 Avenida Del Reposa
Temecula, California 92591
(909) 506-1177
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Prepared by:
Gunvant Thakkar, P.E.
45712 Classic Way
Temecula, California 92592
(909) 676-7541
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GUNVANT THAKKAR,
PROFESSIONAL ENGINEER
45712 Classic Way, Temecula, California 92592 909)676-7541
August 21, 2000
Mr. and Mrs. Joe Viselli
30845 Avenida Del Reposa
Temecula, California 92591
909/506-1177
Project:
Compaction Testing & Report
Lot 544; TR 3883
Dear Mr. Viselli:
In accordance with your request, we have prepared this compaction report for the subject property.
The report represents a summary of the observations and compaction testing of the fill placed on
the proposed grading pad. Field testing and observations indicate the compaction and grading of
the soil was performed properly. The soil should perform satisfactorily for the expected usage. The
included findings and recommendations have been derived in accordance with generally accepted
professional principles and practices in the fields of soil mechanics and foundation engineering.
This warranty is in lieu of all other warranties, either expressed or implied.
2.
INTRODUCTION
In accordance with your request, tests have been performed on the fill placed on the rough graded
residential pad and utility building pad. The excavation, fill placement, compaction and testing
associated with this phase of the grading was performed during July 11 through July 28, 2000. This
report presents a summary of the testing services provided.
PROJECT DESCRIPTION
The site will have a single family residence with a detached garage constructed on it, as well as a
utility building with attached garage, with associated landscaping and access drives. This structure
could consist of a one or two story, wood framed residence founded on a continuous perimeter
footings foundation system.
GRADING PROCEDURES
The observations and test results indicated that the grading was performed in the method
consistent with the U.B.C. All areas to receive fill were stripped and cleared of vegetation and soft
soil prior to placement of soil fill.
The minimum acceptable degree of compaction was 90 percent of the maximum density.
FIELD DENSITY TESTING
Field density testing was performed in accordance with ASTM D1556-64 (Sand Cone Method). The
results of the field density tests are presented in Table I of this report. The approximate location of
the tests are shown on the Plot Plan, Plate 1.
MAXIMUM DENSITY DETERMINATIONS
Maximum density 1 optimum moisture determinations were made from representative samples of
on-site soils used in the fill operations. The tests were performed in accordance with ASTM D1557-
78 Method.
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LIMITATIONS
The findings and recommendations of this report were prepared in accordance with contemporary
principles and practices in the field of geotechnical engineering. No other warranty or guarantee is
either expressed or implied. Only a portion of the subsurface soils and conditions were evaluated or
observed and the conclusions are based upon an interpretation of the soils conditions encountered
in the field tests. Conclusions are also based on the assumption that these findings do not vary
appreciably in the adjacent areas. However, minor variations may occur: should soil conditions
significantly different be encountered in the future, an assessment of the impact on subsequent
recommendations should be made.
All future grading and fill placement should be performed under the inspection and testing of a
registered civil engineer.
SUMMARY
Our description of grading and backfill operations, as well as testing services, were limited to those
grading operations performed during July 11 through July 28, 2000. The conclusions and
recommendations contained herein have been based upon our observation and testing as noted.
To the best of my knowledge, the work within my area of responsibility is in accordance with
applicable provisions of U.B.C.
Due to periodic site inspections and testing, footing excavations should be inspected by a registered
civil engineer prior to concrete placement to verify proper embedment entirely into competent soils.
RECOMMENDATIONS
1. A minimum of three-feet over-excavation has been performed five feet outside proposed building
limits to ensure a uniform blanket of a minimum of 90 percent compaction under structures.
2. A safe allowable bearing value for foundations embedded a minimum of 12" below lowest
adjacent grade into competent ground is 1,500 psf. Continuous footings should have a minimum
width of 12 inches. The isolated column footings should have a minimum embedment of 18
inches below lowest soil grade.
3. All concrete slabs on grade should be 4" thick. They should be underlain by 3" of sand or gravel.
Areas that are to be carpeted or tiled, or where the intrusion of moisture is objectionable, should
be underlain by 6 mil visqueen properly protected from puncture with an additional 1 " of sand
over it. This arrangement of materials would result in a profile downward of concrete, 1" of sand,
6 mil visqueen, 3" of sand and subgrade soil. Contractors should be advised that, when pouring
during hot or windy weather conditions, they should provide large slabs with sufficiently deep
weakened plane joints to inhibit the development of unsightly and irregular cracks.
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4. All footings for single story construction shall be a minimum of 12" in width and 12" in depth,
measured below the lowest adjacent compacted or firm grade. For two story construction, the
footings shall be a minimum of 15" in width and 18" in depth. All footings shall incorporate a
minimum of one # 4 bar running continuously through the footings. The bars shall be lapped a
minimum of 30 bar diameters and shall be placed approximately 3" from the bottom. All footings
shall be extended to a depth sufficient to provide a minimum setback from the bottom of the
footings to the daylight in any adjacent slope in accordance with U.B.C.
5.
$
GUNVANT THAKKAR, PROFESSIONAL ENGINEER
45712 Classic Way, Temecula, California 92592 (909) 676-7541
Mr. Viselli
Maximum Density Optimum Moisture Content
(oct) (%)
131.0 9.0
Eleva-
Tion
(Feet)
Max.Dry
Density
(pcf)
Water
Content
(%)
Dry
Density
(pcf)
Relative Method
Compac-
tion (%)
1. 1215 131 9.2 120.5 92 SC
2. 1209 131 9.5 121.8 93 SC
3. 1218 131 9.2 120.5 92 SC
4. 1221 131 9.5 119.2 91 SC
5. 1224 131 9.4 121.8 93 SC
6. 1223 131 9.7 120.5 92 SC
7. 1224 131 10.1 121.8 93 SC
8. 1227 131 10.2 123.1 94 SC
9. 1229 131 9.8 120.5 92 SC
10. 1233 131 9.5 119.2 91 SC
11. 1237 131 9.6 120.5 92 SC
12. 1239 131 9.7 121.8 93 SC
13. 1246 131 9.8 120.5 92 SC
14. 1247 131 9.6 119.2 91 SC
15. 1245 131 9.7 120.5 92 SC
16. 1220 131 9.6 120.5 92 SC
17. 1205 131 9.7 119.2 91 SC
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DATE:
SITE LOCATION PLAN
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