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HI
EXPLORATION
•
COMPANY, INC.
Soil Engineering, Environmental Engineering, Materials Testing, Geology
August 13, 2019
Project No. Digitexc-23
TO: Dig It Exc.
7670 Concord Ave.
Fontana, CA 92336
SUBJECT: Report of Laboratory and Field Density Test Results, Swimming Pool Backfill, 1900
7th Place, Arcadia, California 91006
Introduction
We have prepared this report containing results of field density and laboratory testing and limitation of our
work performed during backfill of the swimming pool at the subject site: V
Summary of Work Performed
Swimming pool area backfill was performed by Dig It Exc. of Fontana,California. Backfill was performed on.
We understand that punching of holes at the bottom of the pool prior to start of backfill was observed and
approved by the City inspector.
Imported soils classified as light brown silty sand (USCS "SM") were utilized for the backfill. Backfill was
performed and compacted by a bobcat.Water was applied by water hose.
Compacted Fills
Fills were placed in 6-to-8-inch loose lifts, moisture conditioned, mixed and compacted. Tests results
indicate a minimum 90 percent compaction relative to the maximum dry density. Maximum dry density was
determined in accordance with ASTM D1557-09 Test Method (5 layers).
Field Density Tests
Field density testing for the pool backfill was provided on an on-call basis on August 13 and 14, 2019. Field
density tests were performed by the Nuclear Gage (ASTM 2922)+Method. Laboratory tests and summary of
field density test results are presented in Appendix A.
Closure
If you should have - „Rg16e clad, garding this report, please do not hesitate to contact our office. We
•appreciate this 0..4,1•V q s '.'ce.
Very truly your• Z �.2
Soil Exploratio 534 7
EXP, T3
•
Gene K. Luu, PE 534,47oFGq�`Fo��
Project Engineer `
7535 Jurupa Ave., Unit C Riverside, CA 92504 . Tel: (951) 688-7200'. Fax: (951) 688-7100
soilexploration@yahoo.com www.soilexp.com
S ,
1900 7th PI. •
Project No. Digitexc-23
Arcadia, California August 13, 2019
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Swimming Pool Backfill
1900 7th Place
Arcadia, California
FIELD DENSITY TEST RESULTS
Test Soil Elev./ Moisture Relative Test
Location Dry Density (pcfj
No. Type Depth (%) Compaction Remarks
Date
Method
Field Maximum Field Opt.
1 8/13/19 " See Plan Attached . 1 -4.0' 116.5 124.0. 12.9 11.0 94 N
2 8/14/19 . 1 -2.0' Bik0 " I Ip " 4h N
3 8/14/19 1 0 1 S%3 " !. 1
RT-Denotes Retest N-Denotes Nuclear Gauge FG—Finish Grade S-Denotes Sand Cone
LABORATORY TEST RESULTS
SAMPLE DESCRIPTION MAXIMUM OPTIMUM
DENSITY MOISTURE
(pcf) (%)
1 Silty Sand: Light brown, fine to medium grained . 124.0 11.0
MAXIMUM DRY DENSITY TESTS .
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Soil Exploration Co., Inc. Appendix A
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