B08 IFB Atch 16 - SIP_Reach I Contract 1 Stockpile Information Report.pdf

20173678.001A/SAC21L123757_R1 Page 1 of 4 March 26, 2021

© 2021 Kleinfelder

KLEINFELDER 2882 Prospect Park Dr., Suite 200, Rancho Cordova, CA 95670 p | 916.366-1701

March 26, 2021 Project No.: 20173678.001A

Mr. John Bassett, PE

SAFCA

1007 7th Street, 7th Floor Sacramento, California 95814

Subject: Borrow Evaluation – Reach I Contract 1 Stockpile B

Natomas Basin Project Reach A Garden Highway

Sacramento County, California

Dear Mr. Bassett:

Kleinfelder has performed a preliminary investigation of the Reach I Contract 1 Stockpile B located along Garden Highway in Sacramento County, California. It is understood that Stockpile B is being considered as a potential borrow site for the United States Army Corps of Engineers (USACE) Natomas Basin Project levee improvements. This work included field and laboratory investigation programs and the preparation of this memorandum.

BACKGROUND INFORMATION

Stockpile B is in the southwest corner of the Natomas Basin in Sacramento County just east of the Interstate 80 crossing the Sacramento River as shown on Figure 1. Stockpile B is located between Garden Highway to the south and Wheelhouse Drive to the north across from Sand Cove Park. The site is currently situated in an area of undeveloped land south of a residential neighborhood along Wheelhouse Avenue. The stockpile encompasses approximately 500 feet by 200 feet and is approximately 18 feet in height with 3 horizontal to 1 vertical (3H:1V) slopes as shown on Figure 2.

Stockpile B consists of excavated trench spoils from the approximately 50-foot deep slag cement-cement-bentonite (SCCB) cutoff wall installed within the levee between Northgate Boulevard and Gateway Oaks Drive for the USACE Reach I Contract 1 project. During construction of the cutoff wall, the SCCB slurry was pumped into the trench throughout the excavation and maintained within 2 feet of the top of the trench. The trench was excavated using a bucket with a hole to drain as much excess slurry as possible before the excavated material was placed into haul trucks and transported to the stockpile. The excavated material was placed on the stockpile, spread into thin lifts, moisture conditioned, and compacted. As required by Reach I Contract 1 project specifications the material was moisture conditioned, as needed, to between 3 percentage points above and 1 percentage point below the optimum moisture content, placed in no greater than 6-inch loose lifts, and compacted to a minimum of 90 percent of the maximum dry density per ASTM D698.

SCOPE OF WORK

The scope of work included a field investigation of the potential borrow site, geotechnical laboratory testing of samples obtained during the field investigation, and preparation of this

20173678.001A/SAC21L123757_R1 Page 2 of 4 March 26, 2021

KLEINFELDER 2882 Prospect Park Dr., Suite 200, Rancho Cordova, CA 95670 p | 916.366-1701 letter. This letter has been prepared consistent with the authorized scope of services contained in our proposal dated December 7, 2020. Results of the field and laboratory investigation and preliminary conclusions are included in this letter.

FIELD INVESTIGATION

The subsurface conditions at Stockpile B were explored on December 23, 2020 by excavating five test pits to a depth of 12 feet below existing grade from the top of the stockpile and collecting six surface samples from the slope base around the perimeter of the site as shown on Figure 2.

Test pits were excavated by Hardcore Construction Services of Grass Valley, California using a Deere 310 backhoe. A Kleinfelder staff professional maintained a log of each test pit, visually identified and classified soils encountered in general accordance with ASTM D2488 and obtained disturbed bulk samples of the subsurface soils that were encountered at the site. Soil samples obtained from the test pits were labeled and sealed to prevent moisture loss before being transported to Kleinfelder’s Sacramento laboratory for geotechnical testing. Upon completion of geotechnical laboratory testing, soil classifications were updated in general accordance with ASTM D2487 and are presented on the Test Pit Logs (Attachment A).

After the test pits were completed, they were backfilled with excavated test pit material and compacted using a compaction wheel. Latitude and longitude of each test pit was obtained from Google Earth using a cellular phone. Information on each test pit is included in Table 2 below.

Table 2 Stockpile Borrow Site Exploration

Test Pit Number Site Depth (feet) Latitude

(WGS84)1

Longitude

(WGS84)1

RCI-TP-1 Stockpile 12 38.60080 -121.54417

RCI-TP-2 Stockpile 12 38.60072 -121.54402

RCI-TP-3 Stockpile 12 38.60092 -121.54393

RCI-TP-4 Stockpile 12 38.60101 -121.54351

RCI-TP-5 Stockpile 12 38.60113 -121.54355

1. World Geodetic System 1984 geographic coordinate system

The Test Pit Logs are included in Attachment A on Figures A-3 through A-7. Information on ASTM D2487 is presented on Figure A-1 and a key to the Test Pit Logs is presented on Figure A-2.

GEOTECHNICAL LABORATORY TESTING

Geotechnical laboratory tests were performed on selected samples to aid in soil classification and to evaluate engineering properties of the soils. A description of each geotechnical laboratory test performed for this study is presented below. A summary of all the geotechnical

20173678.001A/SAC21L123757_R1 Page 3 of 4 March 26, 2021

KLEINFELDER 2882 Prospect Park Dr., Suite 200, Rancho Cordova, CA 95670 p | 916.366-1701 laboratory tests performed on the two borrow sites is presented on the Figures B-1 through B-7 in Attachment B and shown on the Test Pit Logs in Attachment A.

Moisture Content

Moisture content was evaluated in general accordance with ASTM Test Method D2216. Test results are presented on the Test Pit Logs and are summarized on the Laboratory Test Result Summary (Figure B-1).

Atterberg Limits

Atterberg Limits tests were performed to aid in soil classification and to evaluate the plasticity characteristics of the material. Tests were performed in general accordance with ASTM Test Method D4318. Results of these tests are presented on the Test Pit Logs and are summarized on Figure B-1. In addition, plasticity charts summarizing the results of these tests are presented on Figures B-2 and B-3.

Sieve Analysis

Full sieve analyses were performed to evaluate the gradational characteristics of the material and to aid in soil classification. Tests were performed in general accordance with ASTM Test Method D6913. Results of these tests are presented on the Test Pit Logs and are summarized on Figure B-1. In addition, particle-size distribution curves summarizing the results of the sieve analysis tests are presented on Figures B-4 through B-7.

SUBSURFACE CONDITIONS

Based on the site investigation and laboratory testing results, the upper 8 feet of the stockpile soils generally consist of fat and lean clays with sand and elastic silts with sand. The liquid limits of these soils are generally greater than 45 with a plasticity index between 20 to 23. Test Pit RCI-TP-3 encountered a silty gravel with 45 percent plastic fines. These upper soils were generally underlain by sandy silt and silt with sand that have a plastic index and liquid limit ranging from 7 to 15 and 34 to 38, respectively. An estimated up to 10 percent cobbles a maximum of 5 inches in length were encountered below 9 feet at Test Pit RCI-TP-2. Cobbles and boulders up to 18 inches in length were encountered in Test Pit RCI-TP-4 at a depth of about 11 feet. Grab samples collected at the base of Stockpile B were classified in the field as lean clay with sand and one sample that was tested had a plasticity index of 11 and liquid limit of 31.

The moisture content of the sampled soils was generally between 18 percent and 25 percent with a few silt and elastic silt samples between 30 percent and 45 percent.

Trace detritus material consisting of plastic sheeting, rootlets, bricks, and fragments of asphalt concrete were encountered at depth within all test pit locations.

SCCB from the SCCB cutoff wall was found throughout the stockpile and was observed as blue and white pieces ranging from fine sand-size up to 18 inches in maximum dimension. The percentage of SCCB was visually estimated to be up to approximately 10 percent to 20 percent by volume. Cementation of the excavated soils was not observed. The SCCB pieces within the soil matrix were estimated to be moderately to strongly cemented. According to ASTM D2488, 20173678.001A/SAC21L123757_R1 Page 4 of 4 March 26, 2021

KLEINFELDER 2882 Prospect Park Dr., Suite 200, Rancho Cordova, CA 95670 p | 916.366-1701 moderate cementation will crumble or break with considerable finger pressure and strong cementation will not break or crumble with finger pressure.

The Test Pit Logs presented in Attachment A provide more detailed information on the soil conditions encountered in the test pits.

Groundwater was not encountered, but It should be noted that groundwater levels will fluctuate in response to seasonal changes, irrigation practices, nearby levels of the Sacramento River and ditches, precipitation, and groundwater recharge. Evaluation of these factors was beyond the scope of this study.

LIMITATIONS

Results contained in this report are based on our field observations, subsurface explorations completed by Kleinfelder, laboratory tests, and our present knowledge of the existing site conditions. It is possible soil conditions could vary between or beyond the points explored.

This report may be used only by the Client and only for the purposes stated, within a reasonable time from its issuance. Land use, site conditions (both on site and off site), or other factors may change over time and additional work may be required with the passage of time. Any party other than the Client who wishes to use this report shall notify Kleinfelder of such intended use.

Based on the intended use of the report, Kleinfelder may require that additional work be performed and that an updated report be issued. Non-compliance with any of these requirements by the Client or anyone else will release Kleinfelder from any liability resulting from the use of this report by any unauthorized party.

We appreciate the opportunity to work with you on this project. If you have any questions regarding this report, please contact us.

Respectfully submitted, KLEINFELDER, INC.

Meredith Beswick, PE, PG Rebecca L. Money, PE, GE Senior Professional Principal Geotechnical Engineer

ATTACHMENTS

Figures 1 Site Vicinity Map 2 Test Pit Location Map

Attachments A Test Pit Logs B Geotechnical Laboratory Test Results

FIGURES

© OpenStreetMap (and) contributors, CC-BY-SA

Copyright:(c) 2018 Garmin

SITE LOCATION MAP

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

20173678.001A

C. Scudder

The information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information.

PROJECT NO.

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www.kleinfelder.com

The information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information.

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EXPLORATION LOCATION MAP

20173678.001A

01/04/2021

C. Scudder

D. Ross

FIGURE

Borrow Evaluation - Reach I

Contract 1 Stockpile

Sacramento, California

APPROXIMATE SCALE: 1 inch =

80 feet

40 8080

© 2018 Microsoft Corporation © 2018 DigitalGlobe ©CNES (2018) Distribution Airbus DS © 2018 HERE bing

LEGEND

Approximate Test Pit Location

Approximate Grab Sample Location

(Stockpile Base)

AutoCAD SHX Text N

ATTACHMENT A

A-1

FIGURE

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

The report and graphics key are an integral part of these logs. All data and interpretations in this log are subject to the explanations and limitations stated in the report.

Lines separating strata on the logs represent approximate boundaries only. Actual transitions may be gradual or differ from those shown.

No warranty is provided as to the continuity of soil or rock conditions between individual sample locations.

Logs represent general soil or rock conditions observed at the point of exploration on the date indicated.

In general, Unified Soil Classification System designations presented on the logs were based on visual classification in the field and were modified where appropriate based on gradation and index property testing.

Fine grained soils that plot within the hatched area on the Plasticity Chart, and coarse grained soils with between 5% and 12% passing the No.

200 sieve require dual USCS symbols, ie., GW-GM, GP-GM, GW-GC, GP-GC, GC-GM, SW-SM, SP-SM, SW-SC, SP-SC, SC-SM.

ABBREVIATIONS

WOH - Weight of Hammer WOR - Weight of Rod

CL

CL-ML

GM

GC

GW

GP

GW-GM

GW-GC

CH

CLAYEY GRAVELS,

GRAVEL-SAND-CLAY MIXTURES

GRAVELS

WITH >

12%

FINES

Cu 4 and 1 Cc 3

Cu 6 and/ or 1 Cc 3

SILTY SANDS, SAND-GRAVEL-SILT

MIXTURES

CLAYEY SANDS,

SAND-GRAVEL-CLAY MIXTURES

SW-SM

CLAYEY SANDS, SAND-SILT-CLAY

MIXTURES

Cu 6 and 1 Cc 3

SC-SM

Cu 4 and 1 Cc 3

ORGANIC SILTS & ORGANIC SILTY CLAYS OF

LOW PLASTICITY

SILTS AND CLAYS

(Liquid Limit less than 50)

WELL-GRADED SANDS,

SAND-GRAVEL MIXTURES WITH

LITTLE OR NO FINES

POORLY GRADED SANDS,

SAND-GRAVEL MIXTURES WITH

LITTLE OR NO FINES

MH

OH

ML

GC-GM

C O

A R

S E

G R

A

IN

E D

S O

IL

S

M or e th an h al f o f m at er ia l i s la rg er th an th e

#2 s ie ve

UNIFIED SOIL CLASSIFICATION SYSTEM (ASTM D 2487)

Cu 6 and 1 Cc 3

GP-GM

GP-GC

INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY, GRAVELLY

CLAYS, SANDY CLAYS, SILTY CLAYS, LEAN CLAYS

GRAPHICS KEY

CLEAN

SANDS

WITH

<5%

FINES

G R

A V

E L

S

M or e th an h al f o f c oa rs e fr ac tio n is la rg er th an th e

#4 s ie ve

Cu 6 and/ or 1 Cc 3>

SANDS

WITH

5% TO

12%

FINES

SANDS

WITH >

12%

FINES

WELL-GRADED SANDS,

SAND-GRAVEL MIXTURES WITH

LITTLE FINES

Cu 4 and/ or 1 Cc 3>

CLEAN

GRAVEL

WITH

<5%

FINES

GRAVELS

WITH

5% TO

12%

FINES

OL

SP

SP-SM

SP-SC

SM

SC

WELL-GRADED GRAVELS,

GRAVEL-SAND MIXTURES WITH

LITTLE OR NO FINES

POORLY GRADED GRAVELS,

GRAVEL-SAND MIXTURES WITH

LITTLE OR NO FINES

WELL-GRADED GRAVELS,

GRAVEL-SAND MIXTURES WITH

LITTLE FINES

WELL-GRADED GRAVELS,

GRAVEL-SAND MIXTURES WITH

LITTLE CLAY FINES

POORLY GRADED GRAVELS,

GRAVEL-SAND MIXTURES WITH

LITTLE FINES

POORLY GRADED GRAVELS,

GRAVEL-SAND MIXTURES WITH

LITTLE CLAY FINES

SILTY GRAVELS, GRAVEL-SILT-SAND

MIXTURES

CLAYEY GRAVELS,

GRAVEL-SAND-CLAY-SILT MIXTURES

WELL-GRADED SANDS,

SAND-GRAVEL MIXTURES WITH

LITTLE CLAY FINES

POORLY GRADED SANDS,

SAND-GRAVEL MIXTURES WITH

LITTLE CLAY FINES

SW

SW-SC

POORLY GRADED SANDS,

SAND-GRAVEL MIXTURES WITH

LITTLE FINES

Cu 4 and/ or 1 Cc 3>

INORGANIC SILTS AND VERY FINE SANDS, SILTY OR

CLAYEY FINE SANDS, SILTS WITH SLIGHT PLASTICITY

ORGANIC CLAYS & ORGANIC SILTS OF

MEDIUM-TO-HIGH PLASTICITY

INORGANIC CLAYS OF HIGH PLASTICITY, FAT

CLAYS

INORGANIC SILTS, MICACEOUS OR

DIATOMACEOUS FINE SAND OR SILT

INORGANIC CLAYS-SILTS OF LOW PLASTICITY, GRAVELLY

CLAYS, SANDY CLAYS, SILTY CLAYS, LEAN CLAYS

STANDARD PENETRATION SPLIT SPOON SAMPLER

(2 in. (50.8 mm.) outer diameter and 1-3/8 in. (34.9 mm.) inner diameter)

CALIFORNIA SAMPLER

(3 in. (76.2 mm.) outer diameter)

MODIFIED CALIFORNIA SAMPLER

(2 or 2-1/2 in. (50.8 or 63.5 mm.) outer diameter)

BULK / GRAB / BAG SAMPLE

SAMPLER AND DRILLING METHOD GRAPHICS

SHELBY TUBE SAMPLER

AUGER CUTTINGS

PUSH TYPE SAMPLER

HAND AUGER

SONIC CONTINUOUS SAMPLER

HQ CORE SAMPLE

(2.500 in. (63.5 mm.) core diameter)

F

IN

E G

R A

IN

E

D S

O

IL

S (H al f o r m or e of m at er ia l i s sm al le r th an th e #2 s ie ve

SILTS AND CLAYS

(Liquid Limit 50 or greater)

S A

N D

S

H al f o r m or e of c oa rs e fr ac tio n is s m al le r th an th e

#4 s ie ve

NOTES

GROUND WATER GRAPHICS

OBSERVED SEEPAGE

WATER LEVEL (level after exploration completion)

WATER LEVEL (level where first observed)

WATER LEVEL (additional levels after exploration)

DRAWN BY: DR

CHECKED BY: MB

DATE: 2/9/2021

REVISED: -

PROJECT NO.: 20173678

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CALIFORNIA

SAMPLER

(# blows/ft)

MODIFIED CA

SAMPLER

(# blows/ft)

SPT-N60

(# blows/ft)

A-2

FIGURE

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

> 50

Medium (M)

High (H)

RELATIVE

DENSITY

APPARENT

DENSITY

30 - 50

10 - 30

4 - 10

<4

>60

35 - 60

12 - 35

5 - 12

<4

>70

40 - 70

15 - 40

5 - 15

CONSISTENCY

<2

Moist

The thread is easy to roll and not much time is required to reach the plastic limit. The thread cannot be rerolled after reaching the plastic limit. The lump or thread crumbles when drier than the plastic limit.

It takes considerable time rolling and kneading to reach the plastic limit. The thread can be rerolled several times after reaching the plastic limit. The lump or thread can be formed without crumbling when drier than the plastic limit.

30 - 50

DESCRIPTION

Strongly

FIELD TEST

Alternating layers of varying material or color with the layer less than 1/4-in. thick, note thickness.

FIELD TEST

Absence of moisture, dusty, dry to the touch

Moderately

Will not crumble or break with finger pressure

Pocket Pen (tsf)

Term of

Use

<5%

With

Modifier

5 to <15%

15%

Trace <15%

15 to <30%

30%

AMOUNT

>30

Very Soft

SOIL DESCRIPTION KEY

DESCRIPTION

Damp but no visible water

Boulders

Cobbles coarse fine Gravel

Sand

Fines

GRAIN SIZE

>12 in. (304.8 mm.)

3 - 12 in. (76.2 - 304.8 mm.) Fist-sized to basketball-sized

3/4 -3 in. (19 - 76.2 mm.) Thumb-sized to fist-sized

0.19 - 0.75 in. (4.8 - 19 mm.) Pea-sized to thumb-sized

0.079 - 0.19 in. (2 - 4.9 mm.)#10 - #4

0.017 - 0.079 in. (0.43 - 2 mm.)

#200 - #40 coarse fine medium

SIEVE SIZE APPROXIMATE SIZE

Larger than basketball-sized>12 in. (304.8 mm.)

3 - 12 in. (76.2 - 304.8 mm.)

3/4 -3 in. (19 - 76.2 mm.)

#4 - 3/4 in. (#4 - 19 mm.)

Rock salt-sized to pea-sized

#40 - #10 Sugar-sized to rock salt-sized

0.0029 - 0.017 in. (0.07 - 0.43 mm.) Flour-sized to sugar-sized

Passing #200 <0.0029 in. (<0.07 mm.) Flour-sized and smaller

DESCRIPTION

Secondary Constituent is Fine Grained

Secondary Constituent is

Coarse Grained

SPT - N60

(# blows / ft)

Soft

Stiff

Very Stiff

Hard

2 - 4

4 - 8

8 - 15

15 - 30

Weakly Crumbles or breaks with handling or slight finger pressure

Crumbles or breaks with considerable finger pressure

UNCONFINED

COMPRESSIVE

STRENGTH (Qu)(psf)

VISUAL / MANUAL CRITERIA

<500

0.5 PP <1

1 PP <2

2 PP <4

4 PP >8000

4000 - 8000

500 - 1000

1000 - 2000

2000 - 4000

Rounded

Subrounded

Dry

Wet Visible free water, usually soil is below water table

Thumb will penetrate more than 1 inch (25 mm). Extrudes between fingers when squeezed.

Thumb will penetrate soil about 1 inch (25 mm).

Remolded by light finger pressure.

Thumb will penetrate soil about 1/4 inch (6 mm).

Remolded by strong finger pressure.

Can be imprinted with considerable pressure from thumb.

Thumb will not indent soil but readily indented with thumbnail.

Thumbnail will not indent soil.

Particles have nearly plane sides but have well-rounded corners and edges.

Angular Particles have sharp edges and relatively plane sides with unpolished surfaces.

DESCRIPTION

Fissured

Slickensided

Blocky

Lensed

CRITERIA

Stratified

Laminated

Fracture planes appear polished or glossy, sometimes striated.

Alternating layers of varying material or color with layers at least 1/4-in. thick, note thickness.

Breaks along definite planes of fracture with little resistance to fracturing.

Cohesive soil that can be broken down into small angular lumps which resist further breakdown.

Inclusion of small pockets of different soils, such as small lenses of sand scattered through a mass of clay; note thickness.

Subangular

Particles have smoothly curved sides and no edges.

Particles are similar to angular description but have rounded edges.

None

Weak

Strong

No visible reaction

DESCRIPTION CRITERIA

A 1/8-in. (3 mm.) thread cannot be rolled at any water content.

NPNon-plastic

The thread can barely be rolled and the lump or thread cannot be formed when drier than the plastic limit.

< 30Low (L)

85 - 100

65 - 85

35 - 65

15 - 35

<5 0 - 15

Very Dense

Dense

Medium Dense

>50

Loose

Very Loose

FROM TERZAGHI AND PECK, 1948

LLDESCRIPTION FIELD TEST

Some reaction, with bubbles forming slowly

Violent reaction, with bubbles forming immediately

DESCRIPTION FIELD TEST

PP < 0.25

Medium Stiff

0.25 PP <0.5

PLASTICITYAPPARENT / RELATIVE DENSITY - COARSE-GRAINED SOIL

MOISTURE CONTENTSECONDARY CONSTITUENT CEMENTATION

CONSISTENCY - FINE-GRAINED SOIL

FROM TERZAGHI AND PECK, 1948; LAMBE AND WHITMAN, 1969; FHWA, 2002; AND ASTM D2488

REACTION WITH

HYDROCHLORIC ACID

ANGULARITYSTRUCTURE

GRAIN SIZE

DRAWN BY: DR

CHECKED BY: MB

DATE: 2/9/2021

REVISED: -

PROJECT NO.: 20173678

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Lean CLAY with Sand (CL): high plasticity, reddish brown, trace fine sand, fine to coarse subrounded to subangular gravel up to 3 in., brick and asphalt pieces up to 5 in. in length, sticks and roots up to 1/2 in. diameter, blue and white angular SCCB pieces sized from fine sand up to 5 in., geotextile pieces color change to dark olive brown and olive brown mottling

Sandy SILT (ML): reddish brown, fine sand, fine to coarse subangular gravel up to 2 in., blue and white angular SCCB pieces sized from fine to coarse sand

The test pit was terminated at approximately 12 ft. below ground surface from the top of an approximately 18 ft. high stockpile. The test pit was backfilled with excavated material on December 23, 2020.

Bulk samples were collected from 0-4 ft., 4-8 ft., and 8-12 ft.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during excavation or after completion.

GENERAL NOTES:

Grab samples collected from each foot of excavation, 12 total.

CL

CL

ML

23.0

21.1

20.3

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-3

TEST PIT LOG RCI-TP-1

TEST PIT LOG RCI-TP-1

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Bare Earth

Not Available

Hardcore - #82774Excavation Co.-Lic.#:

Excavation Equip.:

12/23/2020

Foggy

Excav. Dimensions:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Excavation Crew:

310 Backhoe

1.5 x 18 ft

C. Scudder

Plunge: N/A degrees

S. Jensen

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

_K

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/2 2/

:2

P

M B

Y

G G om ez

S am pl e

T yp e

Lean CLAY with Sand (CL): high plasticity, reddish brown, fine to medium sand, trace fine to coarse subangular to subrounded gravel, trace subrounded cobbles up to 6 in., trace red brick debris, rootlets up to 1/4 in. diameter, angular SCCB pieces sized from fine sand up to 5 in.

Sandy SILT (ML): low to medium plasticity, mottled reddish brown and olive brown, trace asphalt detritus, angular SCCB pieces sized from fine sand up to 5 in.

increase in gravel and cobbles up to 5 in.

The test pit was terminated at approximately 12 ft. below ground surface from the top of an approximately 18 ft. high stockpile. The test pit was backfilled with excavated material on December 23, 2020.

Bulk samples were collected from 0-4 ft., 4-8 ft., and 8-12 ft.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during excavation or after completion.

GENERAL NOTES:

Grab samples collected from each foot of excavation, 12 total.

CL

ML

ML

24.0

45.3

23.7

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-4

TEST PIT LOG RCI-TP-2

TEST PIT LOG RCI-TP-2

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Bare Earth

Not Available

Hardcore - #82774Excavation Co.-Lic.#:

Excavation Equip.:

12/23/2020

Foggy

Excav. Dimensions:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Excavation Crew:

310 Backhoe

1.5 x 18 ft

C. Scudder

Plunge: N/A degrees

S. Jensen

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/2 2/

:2

P

M B

Y

G G om ez

S am pl e

T

Silty GRAVEL with Sand (GM): light brown and olive brown, low to medium plasticity fines, trace fine to coarse subrounded to rounded gravel, blue and white angular SCCB pieces sized from fine sand up to 6 in., rootlets up to 1/8 in. diameter

Sandy SILT (ML): low to medium plasticity, olive brown, trace fine sand, rootlets up to 1/8 in. diameter, geotextile and plastic trash detritus, angular SCCB pieces sized from fine sand up to 6 in.

brown with reddish brown mottling, decrease in SCCB pieces sized from fine sand up to 6 in.

The test pit was terminated at approximately 12 ft. below ground surface from the top of an approximately 18 ft. high stockpile. The test pit was backfilled with excavated material on December 23, 2020.

Bulk samples were collected from 0-4 ft., 4-8 ft., and 8-12 ft.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during excavation or after completion.

GENERAL NOTES:

Grab samples collected from each foot of excavation, 12 total.

GM

ML

ML

25.0

18.7

19.0

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-5

TEST PIT LOG RCI-TP-3

TEST PIT LOG RCI-TP-3

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Bare Earth

Not Available

Hardcore - #82774Excavation Co.-Lic.#:

Excavation Equip.:

12/23/2020

Foggy

Excav. Dimensions:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Excavation Crew:

310 Backhoe

1.5 x 18 ft

C. Scudder

Plunge: N/A degrees

S. Jensen

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/2 2/

:2

P

M B

Y

G G om ez

S am pl e

T

Fat CLAY with Sand (CH): high plasticity, trace fine sand, trace fine to coarse rounded to subrounded gravel, asphalt detritus up to 12 in., blue and white angular SCCB pieces sized from fine sand up to 4 in.

Sandy Elastic SILT (MH): low to medium plasticity, fine to coarse sand, blue and white angular SCCB pieces sized from fine sand up to 18 in.

fine sand

SILT with Sand (ML): medium plasticity, fine sand, blue and white angular SCCB pieces sized from fine sand up to 18 in.

Sandy Lean CLAY (CL): low to medium plasticity, fine sand, trace fine to coarse subrounded gravel, trace cobbles and boulders up to 18 in., blue and white angular SCCB pieces sized from fine sand up to 18 in.

The test pit was terminated at approximately 12 ft. below ground surface from the top of an approximately 18 ft. high stockpile. The test pit was backfilled with excavated material on December 23, 2020.

Bulk samples were collected from 0-4 ft., 4-8 ft., and 8-12 ft.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during excavation or after completion.

GENERAL NOTES:

Grab samples collected from each foot of excavation, 12 total.

CH

MH

ML

25.4

33.8

24.1

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-6

TEST PIT LOG RCI-TP-4

TEST PIT LOG RCI-TP-4

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Bare Earth

Not Available

Hardcore - #82774Excavation Co.-Lic.#:

Excavation Equip.:

12/23/2020

Foggy

Excav. Dimensions:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Excavation Crew:

310 Backhoe

1.5 x 18 ft

C. Scudder

Plunge: N/A degrees

S. Jensen

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/2 2/

:2

P

M B

Y

G G om ez

S am pl e

T

Lean CLAY with Sand (CL): medium plasticity, brown, fine sand, trace fine to coarse rounded to subangular gravel, blue and white angular SCCB pieces sized from fine sand up to 6 in., rootlets up to 1/4 in. diameter

SILT with Sand (ML): low to medium plasticity, mottling of light and dark brown, fine sand, blue and white angular SCCB pieces sized from fine sand up to 6 in.

wood and geotextile detritus, 1/8 in. diameter rootlets

Sandy SILT (ML): low to medium plasticity, trace fine sand, trace fine to coarse subrounded gravel, asphalt detritus, increase in blue and white angular SCCB pieces sized from fine sand up to 10 in.

The test pit was terminated at approximately 12 ft. below ground surface from the top of an approximately 18 ft. high stockpile. The test pit was backfilled with excavated material on December 23, 2020.

Bulk samples were collected from 0-4 ft., 4-8 ft., and 8-12 ft.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during excavation or after completion.

GENERAL NOTES:

Grab samples collected from each foot of excavation, 12 total.

CL

ML

ML

24.0

29.1

21.9

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-7

TEST PIT LOG RCI-TP-5

TEST PIT LOG RCI-TP-5

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Bare Earth

Not Available

Hardcore - #82774Excavation Co.-Lic.#:

Excavation Equip.:

12/23/2020

Foggy

Excav. Dimensions:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Excavation Crew:

310 Backhoe

1.5 x 18 ft

C. Scudder

Plunge: N/A degrees

S. Jensen

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/2 2/

:2

P

M B

Y

G G om ez

S am pl e

T

100 75Lean CLAY with Sand (CL): fine sand, trace fine to coarse subangular to subrounded gravel up to 1 in. diameter, rootlets up to 1/8

in. diameter

The sample was terminated at approximately

0.5 ft. below ground surface. The sample was backfilled with soil on December 23, 2020.

31 11

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during drilling or after completion.

GENERAL NOTES:

Sample collected approximately 1 ft. above the toe of the stockpile.

CL 18.6

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-8

SAMPLE LOG RCI-SLOPE-1

SAMPLE LOG RCI-SLOPE-1

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Straw and Hydroseed Earth

Not Available

NADrilling Company:

Drilling Method:

Drilling Equipment:

12/23/2020

Sunny Sample Diameter:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Drill Crew:

Trowel

C. Scudder

Hand digPlunge: -90 degrees

NA

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

R ec ov er y (N

R

N o

R ec ov er y)

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/0 9/

:5

A

M B

Y

D R os s

S am pl e

T

Lean CLAY with Sand (CL): fine sand, trace gravel up to 1 in. diameter, rootlets up to 1/8

in. diameter

The sample was terminated at approximately

0.5 ft. below ground surface. The sample was backfilled with soil on December 23, 2020.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during drilling or after completion.

GENERAL NOTES:

Sample collected approximately 1 ft. above the toe of the stockpile.

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-9

SAMPLE LOG RIC-SLOPE-2

SAMPLE LOG RIC-SLOPE-2

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Straw and Hydroseed Earth

Not Available

NADrilling Company:

Drilling Method:

Drilling Equipment:

12/23/2020

Sunny Sample Diameter:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Drill Crew:

Trowel

C. Scudder

Hand digPlunge: -90 degrees

NA

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

R ec ov er y (N

R

N o

R ec ov er y)

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/0 9/

:5

A

M B

Y

D R os s

S am pl e

T gravel up to 1 in. diameter, rootlets up to 1/8

in. diameter

The sample was terminated at approximately

0.5 ft. below ground surface. The sample was backfilled with soil on December 23, 2020.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during drilling or after completion.

GENERAL NOTES:

Sample collected approximately 1 ft. above the toe of the stockpile.

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-10

SAMPLE LOG RIC-SLOPE-3

SAMPLE LOG RIC-SLOPE-3

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Straw and Hydroseed Earth

Not Available

NADrilling Company:

Drilling Method:

Drilling Equipment:

12/23/2020

Sunny Sample Diameter:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Drill Crew:

Trowel

C. Scudder

Hand digPlunge: -90 degrees

NA

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

R ec ov er y (N

R

N o

R ec ov er y)

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/0 9/

:5

A

M B

Y

D R os s

S am pl e

T gravel up to 1 in. diameter, rootlets up to 1/8

in. diameter

The sample was terminated at approximately

0.5 ft. below ground surface. The sample was backfilled with soil on December 23, 2020.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during drilling or after completion.

GENERAL NOTES:

Sample collected approximately 1 ft. above the toe of the stockpile.

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-11

SAMPLE LOG RIC-SLOPE-4

SAMPLE LOG RIC-SLOPE-4

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Straw and Hydroseed Earth

Not Available

NADrilling Company:

Drilling Method:

Drilling Equipment:

12/23/2020

Sunny Sample Diameter:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Drill Crew:

Trowel

C. Scudder

Hand digPlunge: -90 degrees

NA

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

R ec ov er y (N

R

N o

R ec ov er y)

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/0 9/

:5

A

M B

Y

D R os s

S am pl e

T gravel up to 1 in. diameter, rootlets up to 1/8

in. diameter

The sample was terminated at approximately

0.5 ft. below ground surface. The sample was backfilled with soil on December 23, 2020.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during drilling or after completion.

GENERAL NOTES:

Sample collected approximately 1 ft. above the toe of the stockpile.

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-12

SAMPLE LOG RIC-SLOPE-5

SAMPLE LOG RIC-SLOPE-5

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Straw and Hydroseed Earth

Not Available

NADrilling Company:

Drilling Method:

Drilling Equipment:

12/23/2020

Sunny Sample Diameter:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Drill Crew:

Trowel

C. Scudder

Hand digPlunge: -90 degrees

NA

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

R ec ov er y (N

R

N o

R ec ov er y)

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_B O

R

IN

G /T

E S

T P

IT

S

O

IL

L O

G

P

LO

T T

E D

/0 9/

:5

A

M B

Y

D R os s

S am pl e

T gravel up to 1 in. diameter, rootlets up to 1/8

in. diameter

The sample was terminated at approximately

0.5 ft. below ground surface. The sample was backfilled with soil on December 23, 2020.

GROUNDWATER LEVEL INFORMATION:

Groundwater was not observed during drilling or after completion.

GENERAL NOTES:

Sample collected approximately 1 ft. above the toe of the stockpile.

LABORATORY RESULTS

Lithologic Description

PAGE:

FIELD EXPLORATION

FIGURE

A-13

SAMPLE LOG RIC-SLOPE-6

SAMPLE LOG RIC-SLOPE-6

D ry

U ni t W t.

(p cf

P as si ng

P as si ng

Surface Condition: Straw and Hydroseed Earth

Not Available

NADrilling Company:

Drilling Method:

Drilling Equipment:

12/23/2020

Sunny Sample Diameter:

Logged By:

Date Begin - End:

Hor.-Vert. Datum:

Weather:

Drill Crew:

Trowel

C. Scudder

Hand digPlunge: -90 degrees

NA

A dd iti on al T es ts

R em ar ks

Li qu id L im it

P la st ic ity I nd ex

(N P

N on P la st ic

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

D ep th fe et

G ra ph ic al L og

S am pl e

N um be r

R ec ov er y (N

R

N o

R ec ov er y)

U S

C S

S ym bo l

W at er C on te nt

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

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ATTACHMENT B

RCI-TP-1 1.0 2 LEAN CLAY WITH SAND (CL) 23.0 100 96 72 46 24 22

RCI-TP-1 7.0 8 LEAN CLAY WITH SAND (CL) 21.1 100 99 78 41 22 19

RCI-TP-1 10.0 11 SANDY SILT (ML) 20.3 96 90 64 38 25 13

RCI-TP-2 2.0 3 LEAN CLAY WITH SAND (CL) 24.0 100 99 80 45 24 21

RCI-TP-2 6.0 7 SANDY SILT (ML) 45.3 95 92 55 47 36 11

RCI-TP-2 9.0 10 SILT WITH SAND (ML) 23.7 100 99 79 42 27 15

RCI-TP-3 0.0 1 SILTY GRAVEL WITH SAND (GM) 25.0 84 69 45 54 33 21

RCI-TP-3 8.0 9 SANDY SILT (ML) 18.7 100 99 64 34 27 7

RCI-TP-3 11.0 12 SANDY SILT (ML) 19.0 100 96 55 34 24 10

RCI-TP-4 3.0 4 FAT CLAY WITH SAND (CH) 25.4 100 99 79 50 28 22

RCI-TP-4 6.0 7 SANDY ELASTIC SILT (MH) 33.8 100 99 60 65 43 22

RCI-TP-4 10.0 11 SILT WITH SAND (ML) 24.1 100 100 72 35 28 7

RCI-TP-5 2.0 3 LEAN CLAY WITH SAND (CL) 24.0 100 100 84 47 24 23

RCI-TP-5 5.0 6 SILT WITH SAND (ML) 29.1 100 99 83 49 29 20

RCI-TP-5 9.0 10 SANDY SILT (ML) 21.9 100 97 64 37 29 8

RCI-SLOPE-1 0.0 LEAN CLAY WITH SAND (CL) 18.6 100 100 75 31 20 11

LABORATORY TEST

RESULT SUMMARY

B-1

P as si n g

/4

Sieve Analysis (%)

P as si n g

P as si n g

P la st ic it y

In d ex

Sample No.

Depth (ft.)

Atterberg Limits

L iq u id

L im it

Sample Description

P la st ic

L im it

W at er C o n te n t

D ry

U n it W t.

p cf

Exploration ID Additional Tests

Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above.

NP = NonPlastic NA = Not Available

FIGURE

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California gINT FILE: Klf_gint_master_2017 PROJECT NUMBER: 20173678.001C OFFICE FILTER: SACRAMENTO gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2017.GLB [LAB SUMMARY TABLE - SOIL] PLOTTED: 02/09/2021 11:07 AM BY: DRoss

CHECKED BY: MB

DRAWN BY: DR

REVISED: -

DATE: 2/9/2021

PROJECT NO.: 20173678

0 10 20 30 40 50 60 70 80 90 100 110

ATTERBERG LIMITS

LL PL PIPassing #200

B-2

Exploration ID Depth (ft.)

CL-ML

LIQUID LIMIT (LL)

P

LA

S T

IC

IT

Y I

N D

E X

P

I)

CL or O L

"U " L

IN

E

ML or OL4

MH or OH

"A " L

IN

E

CH or O H

Sample Number Sample Description

RCI-TP-1

RCI-TP-1

RCI-TP-1

RCI-TP-2

RCI-TP-2

RCI-TP-2

RCI-TP-3

RCI-TP-3

RCI-TP-3

RCI-TP-4

RCI-TP-4

RCI-TP-4

RCI-TP-5

RCI-TP-5

RCI-TP-5

LEAN CLAY with SAND (CL)

LEAN CLAY with SAND (CL)

SANDY SILT (ML)

LEAN CLAY with SAND (CL)

SANDY SILT (ML)

SILT with SAND (ML)

SILTY GRAVEL with SAND (GM)

SANDY SILT (ML)

SANDY SILT (ML)

FAT CLAY with SAND (CH)

SANDY ELASTIC SILT (MH)

SILT with SAND (ML)

LEAN CLAY with SAND (CL)

SILT with SAND (ML)

SANDY SILT (ML)

FIGURE

Testing performed in general accordance with ASTM D4318.

NP = Nonplastic NA = Not Available NM = Not Measured

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

Chart Reference: ASTM D2487

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

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K lf_ gi nt _m as te r_

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S A

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A M

E N

T O gI N

T T

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_A T

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G

A S

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/0

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A M

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R os s

For classification of fine-grained soils and fine-grained fraction of coarse-grained soils.

0 10 20 30 40 50 60 70 80 90 100 110

ATTERBERG LIMITS

LL PL PIPassing #200

B-3

Exploration ID Depth (ft.)

2075NA0

CL-ML

LIQUID LIMIT (LL)

P

LA

S T

IC

IT

Y I

N D

E X

P

I)

CL or O L

"U " L

IN

E

ML or OL4

MH or OH

"A " L

IN

E

CH or O H

Sample Number Sample Description

RCI-SLOPE-1 31 11LEAN CLAY with SAND (CL)

FIGURE

Testing performed in general accordance with ASTM D4318.

NP = Nonplastic NA = Not Available NM = Not Measured

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

Chart Reference: ASTM D2487

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

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A M

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T O gI N

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A N

D A

R D

_G

IN

T _L

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R

A R

Y _2

LF

_A T

T E

R B

E R

G

A S

T M

P

LO

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/0

9/

:0

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R os s

For classification of fine-grained soils and fine-grained fraction of coarse-grained soils.

0.0010.010.1110100

3/8 3 10024 16 301 2006 10

Sample Number Sample Description LL PL PI

%SiltCu %ClayCcExploration ID Depth (ft.)

B-4

SIEVE ANALYSIS

HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS

1403 4 20 40

B O

U L

D E

R

6 601.5 8

D60 D30 D10D100 Passing

3/4" Passing

#4 Passing

#200

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

Exploration ID Depth (ft.)

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

GRAIN SIZE IN MILLIMETERS

medium fine

GRAVEL SAND

COBBLE

coarse coarse

CLAYSILT

fine

Coefficients of Uniformity - Cu = D60 / D10

Coefficients of Curvature - CC = (D30) 2 / D60 D10

D60 = Grain diameter at 60% passing

D30 = Grain diameter at 30% passing

D10 = Grain diameter at 10% passing

RCI-TP-1

RCI-TP-1

RCI-TP-1

RCI-TP-2

RCI-TP-2

RCI-TP-1

RCI-TP-1

RCI-TP-1

RCI-TP-2

RCI-TP-2

NM

NM

NM

NM

0.095

LEAN CLAY with SAND (CL)

LEAN CLAY with SAND (CL)

SANDY SILT (ML)

LEAN CLAY with SAND (CL)

SANDY SILT (ML)

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

FIGURE

143/4 1/212

Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422.

NP = Nonplastic NA = Not Available NM = Not Measured

NM

NM

NM

NM

NM

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

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F

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S A

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A M

E N

T O gI N

T T

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_S T

A N

D A

R D

_G

IN

T _L

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LF

_S

IE

V E

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A

LY

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D6913.

B-5

1403 4 20 40

B O

U L

D E

R

6 601.5 8

D60 D30 D10D100 Passing

3/4" Passing

#4 Passing

#200

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

Exploration ID Depth (ft.)

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

GRAIN SIZE IN MILLIMETERS

medium fine

GRAVEL SAND

COBBLE

coarse coarse

CLAYSILT

fine

Coefficients of Uniformity - Cu = D60 / D10

Coefficients of Curvature - CC = (D30) 2 / D60 D10

D60 = Grain diameter at 60% passing

D30 = Grain diameter at 30% passing

D10 = Grain diameter at 10% passing

RCI-TP-2

RCI-TP-3

RCI-TP-3

RCI-TP-3

RCI-TP-4

RCI-TP-2

RCI-TP-3

RCI-TP-3

RCI-TP-3

RCI-TP-4

NM

0.681

NM

0.099

NM

SILT with SAND (ML)

SILTY GRAVEL with SAND (GM)

SANDY SILT (ML)

SANDY SILT (ML)

FAT CLAY with SAND (CH)

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

FIGURE

143/4 1/212

Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422.

NP = Nonplastic NA = Not Available NM = Not Measured

NM

NM

NM

NM

NM

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

E M

P

LA

T E

E

:K

LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_S

IE

V E

A N

A

LY

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D

R os

B-6

1403 4 20 40

B O

U L

D E

R

6 601.5 8

D60 D30 D10D100 Passing

3/4" Passing

#4 Passing

#200

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

Exploration ID Depth (ft.)

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

GRAIN SIZE IN MILLIMETERS

medium fine

GRAVEL SAND

COBBLE

coarse coarse

CLAYSILT

fine

Coefficients of Uniformity - Cu = D60 / D10

Coefficients of Curvature - CC = (D30) 2 / D60 D10

D60 = Grain diameter at 60% passing

D30 = Grain diameter at 30% passing

D10 = Grain diameter at 10% passing

RCI-TP-4

RCI-TP-4

RCI-TP-5

RCI-TP-5

RCI-TP-5

RCI-TP-4

RCI-TP-4

RCI-TP-5

RCI-TP-5

RCI-TP-5

NM

NM

NM

NM

NM

SANDY ELASTIC SILT (MH)

SILT with SAND (ML)

LEAN CLAY with SAND (CL)

SILT with SAND (ML)

SANDY SILT (ML)

NM

NM

NM

NM

NM

NM

NM

NM

NM

NM

FIGURE

143/4 1/212

Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422.

NP = Nonplastic NA = Not Available NM = Not Measured

NM

NM

NM

NM

NM

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

T F

IL

E

K lf_ gi nt _m as te r_

O

JE

C

T N

U M

B E

R

.0

F

IC

E

F

IL

T E

R

S A

C R

A M

E N

T O gI N

T T

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P

LA

T E

E

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LF

_S T

A N

D A

R D

_G

IN

T _L

IB

R

A R

Y _2

LF

_S

IE

V E

A N

A

LY

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IS

P

LO

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D

R os

B-7

1403 4 20 40

B O

U L

D E

R

6 601.5 8

D60 D30 D10D100 Passing

3/4" Passing

#4 Passing

#200

2031 11NA

NM NM0 100100150 NM

Exploration ID Depth (ft.)

P E

R C

E N

T F

IN

E

R B

Y W

E

IG

H T

GRAIN SIZE IN MILLIMETERS

medium fine

GRAVEL SAND

COBBLE

coarse coarse

CLAYSILT

fine

Coefficients of Uniformity - Cu = D60 / D10

Coefficients of Curvature - CC = (D30) 2 / D60 D10

D60 = Grain diameter at 60% passing

D30 = Grain diameter at 30% passing

D10 = Grain diameter at 10% passing

0RCI-SLOPE-1

RCI-SLOPE-1 NM

LEAN CLAY with SAND (CL)

NM NM

FIGURE

143/4 1/212

Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422.

NP = Nonplastic NA = Not Available NM = Not Measured

75 NM

Borrow Evaluation - Reach I Contract 1 Stockpile

Sacramento, California

DATE: 2/9/2021

DRAWN BY: DR

REVISED: -

PROJECT NO.: 20173678

CHECKED BY: MB

gI N

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