HomeMy WebLinkAboutPD 2020-0049; HOPE ELEMENTATRY SCHOOL; FINAL SOILS REPORT PH 2; 2023-10-06
GEOTECHNICAL
MATERIALS
SPECIAL INSPECTION DVBE SBE SDVOSB SLBE
4373 Viewridge Avenue, Suite B San Diego, CA 92123 P: 858.292.7575
usa-nova.com 944 Calle Amanecer, Suite F San Clemente, CA 92673 P: 949.388.7710
Carlsbad Unified School District October 6, 2023
Mr. Brian Litchfield NOVA Project No. 1023075
6225 El Camino Real
Carlsbad, CA 92009
Subject: Report
As-Graded Geotechnical Conditions
Hope Elementary School Modernization Phase 2
3010 Tamarack Avenue, Carlsbad, California 92010
DSA No.: 04-118734
Dear Mr. Litchfield:
This report presents the geotechnical observations and the results of testing performed by NOVA
Services, Inc. (NOVA) during grading for the above-referenced project. This report addresses only the
geologic and geotechnical considerations associated with the project’s construction.
The services described herein were performed by NOVA for Carlsbad Unified School District. NOVA
is retained by Carlsbad Unified School District as Geotechnical Engineer-of-Record (GEOR) for this
work.
Based on the observations and testing reported herein, NOVA certifies that the soil engineering and
engineering geologic aspects of the grading are in compliance with the approved geotechnical reports
and the grading plans provided by FPL and Associates, Inc. (Drawing No. 528-2A).
Affected in part by civil redesigns, the entire modernization project was completed over a period of
about three years, in distinct construction efforts denoted herein as ‘Phase 1’ and ‘Phase 2’. The
principal elements of work for each of the phases are abstracted below.
• Phase 1. Completed over the period July 2020 to September 2021, and provided earthwork
related to the construction of pads for a series of new classrooms, a classroom addition,
utilities, a playground area, and new pavements.
• Phase 2. Completed over the period June 21, 2023 to August 17, 2023, and provided
earthwork for new storm drains, water treatment ponds, playground equipment areas, new
pavements, and walkways.
This report addresses Phase 2 only. Reporting related to Phase 1 is submitted under separate cover.
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
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BACKGROUND
Location
The subject site (hereinafter, ‘the site’) is located within the Hope Elementary campus, comprising one
area on the north side of the campus and one area on the south. The school campus is nominally
located at 3010 Tamarack Avenue in Carlsbad, California. The site on the north part of the campus is
bounded by natural slopes on the north and east, classroom buildings to the south, and Tamarack
Avenue to the east. The site on the south part of the campus is bounded by natural slopes to the west
and south, classroom buildings to the north, and Tamarack Avenue to the east. Figure 1 depicts the
approximate areas where Phase 2 construction efforts took place.
Figure 1. Vicinity Map Before Phase 2 Construction (source: Google Earth 2023)
Project Description
The purpose of the earthwork was to change the existing ground form and provide compacted
subgrade soils for the construction of two water treatment ponds, playground equipment areas, tree
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
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wells, and a lunch shelter. Associated improvements include underground storm drain utilities, asphalt
pavements, walkways, and landscaping.
Plate 1: As-Graded Geotechnical Map presents the site layout.
Permitted Design Documentation
Geotechnical
The design basis geotechnical report is Report, Geotechnical and Geohazard Investigation, Hope
Elementary School Modernization, 3010 Tamarack Avenue, Carlsbad, California, NOVA Services Inc.,
Project No. 2019157, September 5, 2019 (hereinafter, ‘NOVA 2019’).
Construction
Permitted construction drawings addressing earthwork are provided in Grading Plans For: Hope
Elementary School, FPL and Associates, Inc., Project Number PD2020-0049, October 15, 2019
(hereinafter, ‘FPLA 2019).
OBJECTIVES AND SCOPE OF NOVA’S SERVICES
Objectives
The objective of the work reported herein was twofold, namely: (i) to observe geologic conditions
encountered during grading, and (ii) to document that earthwork/grading was completed in
conformance with the requirements of the design documentation listed above.
Scope
In order to accomplish the above objectives, NOVA undertook the scope of services abstracted below
during the period of relevant construction, June 21, 2023 to August 17, 2023.
1. Observation and Testing. NOVA performed observation and testing as requested by the
contractor during grading (removals and compaction) and post-grading (pavements and
utilities) operations. Quality Assurance (QA) in-place density testing of soils placed as
compacted fills and backfills was performed after ASTM D6938 (‘In-Place Density and Moisture
by Nuclear Methods’). The density of the asphaltic wearing surface of pavements was
determined after ASTM D2950 (‘Standard Test Method for Density of Bituminous Concrete by
Nuclear Methods’).
The approximate locations of the density tests conducted for this work are shown on the
attached Plates. The laboratory test results are presented in Table I. The field in-place density
test results are summarized in Table II.
2. Laboratory Testing. The field density testing was supported by laboratory testing of
representative samples of soils utilized for fills, backfills, and pavement materials in
accordance with ASTM D1557. The test results are presented in Table I. The indications of
this testing are the basis for NOVA’s judgments regarding the relative compaction of the fills
placed.
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
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3. Technical Support. NOVA provided technical support in response to geotechnical-related
issues that arose during construction.
4. Reporting. NOVA provided reporting during the conduct of the work. Preparation of this report
completes NOVA’s scope of services.
OBSERVED SOIL AND GEOLOGIC UNITS
General
The adequacy of earthwork was determined in part by observation of earthwork operations by NOVA
staff familiar with the requirements for earthwork in the Carlsbad area and familiar with both the
specific intent and specific requirements of this project. This observation was the basis for selection
by NOVA of locations for testing of density and for recovery of samples for laboratory testing.
The following subsections provide discussion regarding NOVA’s observations of the geologic units.
Engineered Artificial Fill Placed by NOVA (af)
During grading for the subject development, previously placed fills and excavated Santiago Formation
were removed and replaced as compacted engineered fill after ASTM D6938 (‘In-Place Density and
Moisture by Nuclear Methods’). All of this earthwork was the object of QA observation, testing, and
technical support by NOVA, as described above.
Santiago Formation (Tsa)
As reported in NOVA 2019 and encountered during grading operations in the field, the site is underlain
by medium to very dense formational sandstones of the Santiago Formation. These deposits generally
consisted of white to light gray silty sandstones.
CONSTRUCTION SUMMARY
General
NOVA provided part-time observation of earthwork operations, as requested by the contractor. The
description of earthwork operations provided in the following subsections reflects observations by
NOVA during its presence on-site and may not reflect all work by the contractor.
Construction of relevance to this report was completed during the period June 21, 2023 to August 17,
2023.
The contractor was Lusardi Construction Co. The specialty earthwork subcontractor was Pratt
Construction. Storm drain line utilities were installed by Trinity Construction, Inc. Installment of
pavements and pavement materials was completed by RAP Engineering, Inc.
Site Preparation
Prior to earthwork operations, debris, topsoil, and vegetation in the areas being improved were
removed and disposed of off-site.
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
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Operations
The grading subcontractor utilized a variety of medium to heavy-duty equipment to perform the
earthwork. Equipment included: tracker dozers, wheel loaders, backhoes, tracked excavators, rollers,
and sheepsfoot compaction wheels. Manually operated reciprocating hammers were used where
access to larger equipment was limited.
Lunch Canopy Structure Foundations
NOVA observed soils exposed during excavation for the isolated foundations for the support of the
lunch shelter. The foundation excavations were observed by NOVA to be properly dimensioned and
embedded into proper bearing strata.
Water Treatment Ponds
NOVA observed the construction of two water treatment ponds throughout the site. Earthwork for the
basins primarily consisted of cutting to grade; however, fill was placed around the ponds to achieve
finished grade for grass field and landscaping areas. Fill placed in these areas was placed in loose
lifts of typically 8 to 10 inches and densified to at least 90% relative compaction at near optimum
moisture content after ASTM D1557 (the ‘Modified Proctor’) in accordance with the project
specifications. NOVA was not requested to observe any soil media placed within the BMPs.
Figure 2 depicts the earthwork operations for a water treatment pond.
Figure 2. Grading Operations for Water Treatment Pond B (July 7, 2023)
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
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Tree Well Basin
NOVA observed construction of a tree well basin on the northwest side of the site. Earthwork for the
basins primarily consisted of cutting to grade; however, fill was placed around the basins to achieve
finished grade for the grass field landscaping areas. Fill placed in these areas was placed in loose lifts
of typically 8 to 10 inches and densified to at least 90% relative compaction at near optimum moisture
content after ASTM D1557 (the ‘Modified Proctor’) in accordance with the project specifications. NOVA
was not requested to observe any soil media placed within the BMPs.
Figure 3 depicts fill being placed and compacted on the outer edges of the tree well basin.
Figure 3. Grading Operations for the Tree Well Basin (June 29, 2023)
Post Grading
Storm Drain Utility Lines and Structures
NOVA observed backfilling operations for several storm drain utility line trenches. Characteristically
sandy utility backfill was moisture conditioned to near optimum moisture content and compacted to at
least 90% relative compaction after ASTM D1557 using manually operated reciprocating hammers
and a sheepsfoot wheel attached to tracked excavators. Figure 4 depicts the compaction of the
utilities.
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
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Figure 4. Compaction of Backfill for Storm Drain Structure (July 5, 2023)
Flexible Pavements
Construction of flexible pavement sections for recreation use and for walkways between structures
included the sequence of operations described below.
1. Step 1, Subgrade Preparation. Subgrade preparation for construction of paved areas
consisted of removing 2 feet of existing soils and scarifying the surficial soils, moisture
conditioning, and densification of the bottoms of removals. Where Santiago Formation was
exposed during removals, over-excavation to 2 feet was not required. In either case, soils
were then replaced and densified to a depth of 12 inches to at least 95% relative compaction
after ASTM D1557.
2. Step 2, Base Course. An approximately 4 to 6.5-inch-thick layer of recycled class II
aggregate base for driveways, recreational areas, and walkways was densified to at least
95% of the material’s maximum density.
3. Step 3, Wearing Surface. An approximately 3 to 4-inch-thick asphaltic wearing surface was
spread in loose lifts and densified by static rolling.
Figure 5 depicts Step 3 of the above-described paving operations.
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
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Figure 5. Paving Operations for Area Surrounding Playground (August 13, 2021)
Flatwork
Flatwork subgrade preparation consisted of performing excavations of approximately 12 inches of
soils from the planned finished grade elevations or to contact with Santiago Formation, whichever
occurred first. Exposed soils were then scarified, moisture conditioned, and densified to a depth of 12
inches to at least 90% relative compaction after ASTM D1557. Thereafter, soil was moisturized to near
optimum moisture content and then spread in loose lifts of typically 4 to 8 inches. Soils were then
densified to at least 90% relative compaction after ASTM D1557 in accordance with the project
specifications.
CONCLUSIONS AND LIMITATIONS
Observed Geologic and Soil Conditions
Based on the observations and testing reported herein, NOVA certifies that the soil engineering and
engineering geologic aspects of the grading are in compliance with the approved geotechnical report
(NOVA 2019) and the grading plans provided by FPL and Associates, Inc (Drawing No. 528-2A).
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
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Limitations
Testing and Observation
This report presents opinions, information, and data relative to the earthwork at the subject site.
Representatives of NOVA conducted testing and made observations per the request of the general
contractor during the progress of the construction to evaluate conformance with the project
requirements. The testing by NOVA indicates that the earthwork observed conforms with the project
requirements for placement and densification.
Results presented herein are only representative of the samples and areas tested. As with any
manufactured product, there are statistical variations in the uniformity of an earth fill and in the
accuracy of the test used to measure its qualities. As compared with other manufactured products,
earthwork usually has wider fluctuations in both the product and the test results. Variations in material
properties are inherent in any earthwork operation and should be expected at this site.
Survey
References to elevations and locations herein were based on surveyors or grade checker stakes in
the field and from the project grading plans prepared by FPL and Associates, Inc (FPLA 2019). NOVA
did not provide construction surveying services. NOVA has no opinion regarding the accuracy of the
elevations or surface geometry with respect to the approved plans.
Supervision
The presence of NOVA personnel during the work progress did not involve any direct supervision of
the contractor or their work forces. Professional and technical advice and recommendations were
provided to the owner during the conduct of the work, based upon NOVA’s observations and
evaluations.
CLOSURE
Should you have any questions regarding this letter or other matters, please do not hesitate to contact
the undersigned at 858.292.7575 x 409.
Respectfully submitted,
NOVA Services, Inc.
_______________________ _______________________
Wail Mokhtar John F. O’Brien, PE, GE Senior Project Manager Principal Geotechnical Engineer
Attachments: Attachment 1: Tables I and II Attachment 2: As-Graded Geotechnical Maps Plates
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
ATTACHMENT 1
TABLES
As-Graded Geologic and Geotechnical Conditions
Hope Elementary School Modernization Phase 1 3010 Tamarack Avenue, Carlsbad, California 92010 DSA No.: 04-118734
Hope Elementary School Modernization Ph. 2
Carlsbad, California
October 2023
NOVA Project No. 1023075
Maximum Optimum
Dry Density Moisture
Material ID Material Description (pcf)(%)
A Light Brown Silty Sand 123.8 10.6
B Gray Silty Sand 126.3 8.8
C Light Brown Silty Sand 123.5 8.9
D Class II Base 122.3 8.0
E Class II Recycled Base 122.5 10.5
F Class II Recycled Base (Martin Marietta, Miramar Recycle)121.6 11.6
G Class II Recycled Base (Moody's, El Corazon Recycling)116.0 13.4
Laboratory Maximum Density (ASTM D1560)
Maximum
Wet Density
Material ID Material Description (pcf)
AC-1 10-232 3C2 (Superior Ready Mix, Plant #41)151.0
Abbreviation Description of Terms
SD Storm Drain Line Trench
MG Mass Grading
SG Subgrade
FG Finished Grade
CG Curb and Gutter
SW Sidewalk Subgrade
B Aggregate Base
AC Asphalt Concrete
TABLE I
DESCRIPTION OF TERMS
Laboratory Maximum Density (ASTM D1557)
Hope Elementary School Modernization Ph. 2
Carlsbad, California
October 2023
NOVA Project No. 1023075
Test Test Soil Rel.Pass/
Date Number Type Test Location Elevation ID (pcf)(%)(pcf)(%)Comp.Fail
6/23/23 1 SD Storm Drain Line Trench 215.0 B 126.3 8.8 119.1 10.6 94%Pass
2 SD Storm Drain Line Trench 215.0 B 126.3 8.8 122.0 10.5 97%Pass
3 SD Storm Drain Line Trench 219.0 C 123.5 8.9 118.0 10.9 96%Pass
6/26/23 4 SD Storm Drain Line Trench 220.0 C 123.5 8.9 115.6 10.1 94%Pass
5 SD Storm Drain Line Trench 220.0 C 123.5 8.9 116.9 10.0 95%Pass
6 SD Storm Drain Line Trench 220.0 C 123.5 8.9 115.4 10.5 93%Pass
7 SD Storm Drain Line Trench 220.0 C 123.5 8.9 118.9 9.7 96%Pass
8 SD Storm Drain Line Trench 220.0 C 123.5 8.9 114.3 10.1 93%Pass
9 SD Storm Drain Line Trench 220.0 C 123.5 8.9 113.9 10.6 92%Pass
10 SD Storm Drain Line Trench 216.0 A 123.8 10.6 111.8 11.1 90%Pass
11 SD Storm Drain Line Trench 217.0 A 123.8 10.6 112.3 10.3 91%Pass
12 SD Storm Drain Line Trench 218.0 A 123.8 10.6 111.8 9.6 90%Pass
13 SD Storm Drain Line Trench 217.0 A 123.8 10.6 112.8 10.5 91%Pass
14 SD Storm Drain Line Trench 219.0 A 123.8 10.6 112.6 9.6 91%Pass
15 SD Storm Drain Line Trench 220.0 A 123.8 10.6 113.5 10.2 92%Pass
6/27/23 16 SD Storm Drain Line Trench 221.0 C 123.5 8.9 116.4 8.4 94%Pass
17 SD Storm Drain Line Trench 223.0 C 123.5 8.9 116.8 9.7 95%Pass
18 SD Storm Drain Line Trench 222.0 C 123.5 8.9 117.6 9.8 95%Pass
19 SD Storm Drain Line Trench 223.0 C 123.5 8.9 118.2 10.9 96%Pass
20 SD Storm Drain Line Trench 216.0 A 123.8 10.6 114.3 10.1 92%Pass
21 SD Storm Drain Line Trench 218.0 A 123.8 10.6 113.9 9.7 92%Pass
6/28/23 22 SD Storm Drain Line Trench 221.0 C 123.5 8.9 117.5 10.1 95%Pass
6/29/23 23 MG Tree Well Basin 222.0 C 123.5 8.9 117.1 10.8 95%Pass
24 MG Tree Well Basin 222.0 C 123.5 8.9 118.0 9.1 96%Pass
25 MG Tree Well Basin 222.0 C 123.5 8.9 116.4 10.8 94%Pass
26 MG Tree Well Basin 222.0 C 123.5 8.9 116.6 10.0 94%Pass
27 SG Lunch Area SG D 122.3 8.0 120.0 10.0 98%Pass
28 SG Lunch Area SG D 122.3 8.0 120.6 9.5 99%Pass
29 SG Lunch Area SG D 122.3 8.0 121.3 9.2 99%Pass
7/5/23 30 SD Storm Drain Line Trench 222.0 C 123.5 8.9 116.2 10.0 94%Pass
31 SD Storm Drain Line Trench 224.0 C 123.5 8.9 115.6 9.6 94%Pass
7/6/23 32 SD Storm Drain Line Trench 222.0 C 123.5 8.9 113.6 9.9 92%Pass
7/7/23 33 SD Storm Drain Line Trench 224.0 C 123.5 8.9 114.9 8.8 93%Pass
34 MG Water Treatment Pond B 225.0 C 123.5 8.9 114.6 10.6 93%Pass
35 MG Water Treatment Pond B 225.0 C 123.5 8.9 113.6 8.6 92%Pass
36 MG Water Treatment Pond B 225.0 C 123.5 8.9 113.8 8.1 92%Pass
7/17/23 37 MG Water Treatment Pond B 222.0 A 123.8 10.6 114.2 9.6 92%Pass
38 MG Water Treatment Pond B 222.0 A 123.8 10.6 113.6 9.6 92%Pass
39 FG Bike Rack Area FG A 123.8 10.6 112.1 9.6 91%Pass
40 FG Bike Rack Area FG A 123.8 10.6 114.5 10.6 92%Pass
41 CG Curb and Gutter SG A 123.8 10.6 113.8 9.9 92%Pass
42 CG Curb and Gutter SG A 123.8 10.6 112.6 10.8 91%Pass
43 SD Storm Drain Line Trench 215.0 C 123.5 8.9 111.9 10.6 91%Pass
44 SD Storm Drain Line Trench 217.0 C 123.5 8.9 114.4 8.9 93%Pass
45 SD Storm Drain Line Trench 215.0 C 123.5 8.9 111.0 10.1 90%Pass
46 SD Storm Drain Line Trench 217.0 C 123.5 8.9 112.4 9.9 91%Pass
7/18/23 47 MG Tree Well Basin 224.0 C 123.5 8.9 111.6 10.1 90%Pass
48 MG Landscape Area 227.0 C 123.5 8.9 117.1 10.2 95%Pass
Laboratory Field
SUMMARY OF FIELD IN-PLACE DENSITY AND MOISTURE TEST RESULTS
TABLE II
Hope Elementary School Modernization Ph. 2
Carlsbad, California
October 2023
NOVA Project No. 1023075
Test Test Soil Rel.Pass/
Date Number Type Test Location Elevation ID (pcf)(%)(pcf)(%)Comp.Fail
Laboratory Field
SUMMARY OF FIELD IN-PLACE DENSITY AND MOISTURE TEST RESULTS
TABLE II
49 MG Landscape Area 227.0 C 123.5 8.9 116.3 8.3 94%Pass
50 MG Landscape Area 227.0 C 123.5 8.9 113.6 9.6 92%Pass
51 SD Storm Drain Line Trench 217.0 C 123.5 8.9 112.0 10.6 91%Pass
52 SD Storm Drain Line Trench 216.0 C 123.5 8.9 111.5 10.1 90%Pass
53 SD Storm Drain Line Trench 217.0 C 123.5 8.9 111.0 10.6 90%Pass
7/19/23 54 SD Storm Drain Line Trench 217.0 C 123.5 8.9 118.0 9.7 96%Pass
55 SD Storm Drain Line Trench 217.0 C 123.5 8.9 117.9 10.3 95%Pass
56 SW Sidewalk FG C 123.5 8.9 117.2 10.6 95%Pass
57 CG Curb and Gutter SG E 122.5 10.5 119.5 10.6 98%Pass
58 CG Curb and Gutter SG E 122.5 10.5 122.0 10.1 100%Pass
7/20/23 58A SD Storm Drain Line Trench 217.0 C 123.5 8.9 115.3 10.0 93%Pass
7/21/23 59 MG Asphalt Paving Area 223.0 C 123.5 8.9 115.5 8.6 94%Pass
60 MG Asphalt Paving Area 223.0 C 123.5 8.9 116.1 8.4 94%Pass
61 MG Tree Well Basin 224.0 C 123.5 8.9 111.1 10.6 90%Pass
62 CG Curb and Gutter 223.0 C 123.5 8.9 111.6 10.4 90%Pass
63 CG Curb and Gutter 223.0 C 123.5 8.9 112.3 9.6 91%Pass
64 CG Curb and Gutter 222.0 C 123.5 8.9 119.1 9.7 96%Pass
65 CG Curb and Gutter 222.0 C 123.5 8.9 120.3 8.2 97%Pass
66 CG Curb and Gutter 222.0 C 123.5 8.9 120.6 10.3 98%Pass
67 MG Asphalt Paving Area 224.0 C 123.5 8.9 117.6 8.9 95%Pass
68 MG Asphalt Paving Area 224.0 C 123.5 8.9 119.5 9.2 97%Pass
69 MG Asphalt Paving Area 224.0 C 123.5 8.9 119.9 9.1 97%Pass
70 MG Asphalt Paving Area 224.0 C 123.5 8.9 117.8 9.4 95%Pass
71 MG Asphalt Paving Area 224.0 C 123.5 8.9 118.0 9.0 96%Pass
72 MG Asphalt Paving Area 224.0 C 123.5 8.9 117.9 10.2 95%Pass
7/24/23 73 SD Storm Drain Line Trench 220.0 C 123.5 8.9 111.1 8.1 90%Pass
74 SD Storm Drain Line Trench 220.0 C 123.5 8.9 111.6 8.9 90%Pass
75 SD Storm Drain Line Trench 220.0 C 123.5 8.9 111.9 9.1 91%Pass
76 SD Storm Drain Line Trench 221.0 C 123.5 8.9 112.6 10.1 91%Pass
77 MG Asphalt Paving Area 223.0 C 123.5 8.9 118.1 9.7 96%Pass
78 MG Asphalt Paving Area 223.0 C 123.5 8.9 118.8 8.1 96%Pass
79 MG Asphalt Paving Area 223.0 C 123.5 8.9 118.8 8.1 96%Pass
80 MG Asphalt Paving Area 223.0 C 123.5 8.9 118.0 8.6 96%Pass
81 MG Asphalt Paving Area 223.0 C 123.5 8.9 119.3 10.2 97%Pass
82 MG Asphalt Paving Area 223.0 C 123.5 8.9 119.1 10.3 96%Pass
83 MG Asphalt Paving Area 223.0 C 123.5 8.9 118.1 9.2 96%Pass
84 MG Asphalt Paving Area 223.0 C 123.5 8.9 119.6 9.7 97%Pass
85 MG Asphalt Paving Area 223.0 C 123.5 8.9 119.9 10.1 97%Pass
86 MG Asphalt Paving Area 223.0 C 123.5 8.9 118.0 10.6 96%Pass
87 CG Curb and Gutter 222.0 C 123.5 8.9 117.9 8.1 95%Pass
88 CG Curb and Gutter 222.0 C 123.5 8.9 118.1 9.3 96%Pass
89 CG Curb and Gutter 222.0 C 123.5 8.9 118.6 8.6 96%Pass
7/25/23 90 CG Curb and Gutter SG F 121.6 11.6 119.1 10.6 98%Pass
91 CG Curb and Gutter SG F 121.6 11.6 120.0 11.1 99%Pass
92 CG Curb and Gutter SG F 121.6 11.6 119.6 11.9 98%Pass
93 CG Curb and Gutter SG F 121.6 11.6 120.3 11.6 99%Pass
7/26/23 94 CG Curb and Gutter SG F 121.6 11.6 119.2 11.6 98%Pass
95 CG Curb and Gutter SG F 121.6 11.6 120.1 11.1 99%Pass
7/27/23 96 CG Curb and Gutter SG F 121.6 11.6 116.0 11.1 95%Pass
97 CG Curb and Gutter SG F 121.6 11.6 117.6 11.6 97%Pass
Hope Elementary School Modernization Ph. 2
Carlsbad, California
October 2023
NOVA Project No. 1023075
Test Test Soil Rel.Pass/
Date Number Type Test Location Elevation ID (pcf)(%)(pcf)(%)Comp.Fail
Laboratory Field
SUMMARY OF FIELD IN-PLACE DENSITY AND MOISTURE TEST RESULTS
TABLE II
7/28/23 98 FG Sidewalk FG C 123.5 8.9 111.9 9.5 91%Pass
99 FG Sidewalk FG C 123.5 8.9 112.1 10.3 91%Pass
100 B Sidewalk B F 121.6 11.6 114.5 12.5 94%Pass
101 B Sidewalk B F 121.6 11.6 116.3 11.9 96%Pass
7/31/23 102 B Sidewalk B F 121.6 11.6 119.1 12.8 98%Pass
103 B Sidewalk B F 121.6 11.6 119.6 11.5 98%Pass
104 B Sidewalk B F 121.6 11.6 117.6 11.3 97%Pass
105 SD Storm Drain Line Trench 222.0 C 123.5 8.9 119.6 10.9 97%Pass
106 SD Storm Drain Line Trench 223.0 C 123.5 8.9 111.3 8.9 90%Pass
8/2/23 107 B Sidewalk B F 121.6 11.6 116.9 12.2 96%Pass
108 B Sidewalk B F 121.6 11.6 118.6 13.1 98%Pass
109 B Sidewalk B F 121.6 11.6 117.9 13.0 97%Pass
110 B Sidewalk B F 121.6 11.6 118.2 12.9 97%Pass
8/3/23 111 B Asphalt Paving Area B F 121.6 11.6 118.3 12.4 97%Pass
112 B Asphalt Paving Area B F 121.6 11.6 117.8 13.6 97%Pass
113 B Asphalt Paving Area B F 121.6 11.6 118.3 13.4 97%Pass
114 B Asphalt Paving Area B F 121.6 11.6 117.6 12.4 97%Pass
115 B Asphalt Paving Area B F 121.6 11.6 119.8 13.0 99%Pass
116 B Asphalt Paving Area B F 121.6 11.6 116.6 12.7 96%Pass
117 B Asphalt Paving Area B F 121.6 11.6 117.6 12.6 97%Pass
118 B Asphalt Paving Area B F 121.6 11.6 113.4 12.8 93%Pass
8/4/23 119 FG Grass Field FG C 123.5 8.9 118.1 9.0 96%Pass
120 FG Grass Field FG C 123.5 8.9 117.2 8.4 95%Pass
121 FG Grass Field FG C 123.5 8.9 117.6 7.9 95%Pass
122 FG Grass Field FG C 123.5 8.9 115.3 10.1 93%Pass
123 FG Grass Field FG C 123.5 8.9 115.3 9.9 93%Pass
124 FG Grass Field FG C 123.5 8.9 115.9 9.3 94%Pass
8/5/23 125 B Playground Area B G 116.0 13.4 112.5 12.2 97%Pass
126 B Playground Area B G 116.0 13.4 110.2 14.7 95%Pass
127 B Playground Area B G 116.0 13.4 111.9 13.2 96%Pass
8/7/23 128 B Aggregate Base B F 121.6 11.6 119.2 10.9 98%Pass
129 B Aggregate Base B F 121.6 11.6 118.9 10.7 98%Pass
130 B Aggregate Base B F 121.6 11.6 119.6 12.8 98%Pass
AC-1 AC Asphalt Paving Area FS AC-1 151.0 N/A 150.2 N/A 99%Pass
AC-2 AC Asphalt Paving Area FS AC-1 151.0 N/A 143.7 N/A 95%Pass
AC-3 AC Asphalt Paving Area FS AC-1 151.0 N/A 148.9 N/A 99%Pass
AC-4 AC Asphalt Paving Area FS AC-1 151.0 N/A 143.4 N/A 95%Pass
AC-5 AC Asphalt Paving Area FS AC-1 151.0 N/A 146.0 N/A 97%Pass
AC-6 AC Asphalt Paving Area FS AC-1 151.0 N/A 145.6 N/A 96%Pass
AC-7 AC Asphalt Paving Area FS AC-1 151.0 N/A 145.6 N/A 96%Pass
AC-8 AC Asphalt Paving Area FS AC-1 151.0 N/A 146.6 N/A 97%Pass
AC-9 AC Asphalt Paving Area FS AC-1 151.0 N/A 148.4 N/A 98%Pass
AC-10 AC Asphalt Paving Area FS AC-1 151.0 N/A 146.6 N/A 97%Pass
AC-11 AC Asphalt Paving Area FS AC-1 151.0 N/A 147.8 N/A 98%Pass
AC-12 AC Asphalt Paving Area FS AC-1 151.0 N/A 146.2 N/A 97%Pass
AC-13 AC Asphalt Paving Area FS AC-1 151.0 N/A 143.7 N/A 95%Pass
AC-14 AC Asphalt Paving Area FS AC-1 151.0 N/A 147.4 N/A 98%Pass
AC-15 AC Asphalt Paving Area FS AC-1 151.0 N/A 143.5 N/A 95%Pass
AC-16 AC Asphalt Paving Area FS AC-1 151.0 N/A 143.9 N/A 95%Pass
AC-17 AC Asphalt Paving Area FS AC-1 151.0 N/A 145.6 N/A 96%Pass
Hope Elementary School Modernization Ph. 2
Carlsbad, California
October 2023
NOVA Project No. 1023075
Test Test Soil Rel.Pass/
Date Number Type Test Location Elevation ID (pcf)(%)(pcf)(%)Comp.Fail
Laboratory Field
SUMMARY OF FIELD IN-PLACE DENSITY AND MOISTURE TEST RESULTS
TABLE II
AC-18 AC Asphalt Paving Area FS AC-1 151.0 N/A 144.3 N/A 96%Pass
AC-19 AC Asphalt Paving Area FS AC-1 151.0 N/A 145.1 N/A 96%Pass
AC-20 AC Asphalt Paving Area FS AC-1 151.0 N/A 145.3 N/A 96%Pass
Report of As-Graded Geotechnical and Geologic Conditions Hope Elementary School Modernization Phase 2, Carlsbad, CA NOVA Project No. 1023075
October 6, 2023
ATTACHMENT 2
PLATE 1
As-Graded Geologic and Geotechnical Conditions
Hope Elementary School Modernization Phase 1 3010 Tamarack Avenue, Carlsbad, California 92010 DSA No.: 04-118734
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944 Calle Amanecer, Suite FSan Clemente, CA 92673P: 949.388.7710
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SPECIAL INSPECTION
DVBE
www.usa-nova.com
PROJECT NO.:
DRAWN BY:
REVIEWED BY:
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DJ
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SCALE:1"=30'
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GEOTECHNICAL
MATERIALS
SPECIAL INSPECTION
DVBE
www.usa-nova.com
PROJECT NO.:
DRAWN BY:
REVIEWED BY:
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DRAWING TITLE:
SCALE:1"=30'
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APPROXIMATE LOCATION OFIN-PLACE DENSITY TESTS130
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944 Calle Amanecer, Suite FSan Clemente, CA 92673P: 949.388.7710
NOVA
GEOTECHNICAL
MATERIALS
SPECIAL INSPECTION
DVBE
www.usa-nova.com
PROJECT NO.:
DRAWN BY:
REVIEWED BY:
1023075
DJ
DRAWING TITLE:
SCALE:1"=30'
PLATE NO.4 OF 4
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