Amendment 02 Attachment Gibb Wash Test Pit Sieve Tests.pdf

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Attached to
GAOA Gibb Wash Bridge Replacement, Coronado National Forest
Solicitation number
127EAX26Q0022
Issued by

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This document comprises laboratory test reports for soil sample analysis conducted by ConformaTECH, Inc. The reports detail mechanical sieve analysis, Atterberg limits testing, and moisture content determination for silty sand with gravel samples collected from the Gibb's Wash location as part of a Quality Control project (Job No. 18-8985, dated 10/25/2018).

The first sample (Lab No. 8709, Test Point 1) yielded a Unified Soil Classification System (USCS) classification of SP-SM with 43.6% gravel, 45.8% sand, and 10.6% fines, with a moisture content of 7.6%. Atterberg limits testing resulted in non-values (NV) for liquid limit and plastic limit, with non-plastic (NP) plasticity index. The second sample (Lab No. 8710, Test Point 2) produced an USCS classification of SM with 30.7% gravel, 51.7% sand, and 17.6% fines, with a moisture content of 13.9%. This sample exhibited measurable Atterberg limits: liquid limit of 30, plastic limit of 26, and plasticity index of 4. Both samples were analyzed following AASHTO T27/T11, T89 & T90, and T265 standards, with results reviewed and certified by ConformaTECH laboratory personnel.

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Attachment 1 - Solicitation GAOA Gibb Wash Bridge Replacement.pdf PDF
Attachment 2 - SOI Gibb Wash Bridge Replacement.xlsx XLSX spreadsheet

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ConformaTECH

PROJECT:

LOCATION:

MATERIAL:

SAMPLE SOURCE:

Qual ity Control

Gibb's Wash

Silty Sand with Gr avel

T. P . 1

JOB NO:

LAB NO:

DATE SAMPLED:

SIEVE ANALYSIS OF COARSE AND FINE AGGREGATE (AASHTO T27/T11)

DETERMINING PLASTIC LIMIT AND PLASTICITY INDEX OF SOILS (AASHTO T89 & T90) (DRY PREP)

MOISTURE CONTENT (AASHTO T265)

MECHANICAL ANALYSIS

SIEVE SIZE

6 in/ 152mm

4 in/ 100mm

3 in/ 75mm

2 in/ 50mm

1 1/2 in/ 37.5mm

Conform aTech, Inc.

1425 East Apache P ark P l ace

Tucson, Arizona 85714

Tel.: (520) 573-2045

Fax: (520) 573-0528

1 1 /4 in / 32 mm

1 in/ 25 mm

3/4 in/ 19 mm

1/2 in/ 12.5 mm

3/8 in / 9.5 mm

1/4 in/ 6.4 mm

#4, 4.75mm

#8, 2.36mm

#10, 2.00mm

#16, 1.18mm

#30, 0.60mm

#40, .425mm

#50, .300mm

#100, .150mm

#200, .075mm

% PASSING

.59

Reviewed by:

ATTERBERG

LIMITS

LL: NV

PL: NV

Pl: NP uses:

% Gravel

% Sand

% Fines

Moisture Content:

SP-SM

43.6

45.8

10.6

7.6%

18-8985

10/25/2018

Attachment 2

File details come from the government source that posted it. Updated .