839CM3028_3030 SPECS Culpeper Bk05.pdf

02 30 10 2020 Geotechnical Memo -

FOR REFERENCE ONLY

Corporate HQ: 3015 Dumbarton Road Richmond, Virginia 23228 T 804.264.2701 F 804.264.1202 www.fandr.com

A Minority-Owned Business

Report of Geotechnical Study

Culpeper National Cemetery 305 US Avenue

Culpeper, Virginia F&R Project No. 74S-0126

Prepared For:

KCI Engineering of New York, PC 255 East Avenue

Suite 302 Rochester, New York 14604

Prepared By:

10909 Houser Drive Fredericksburg, Virginia 22408

December 22, 2014

20 30 20 2015 Geotechnical Report

- FOR REFERENCE ONLY

FROEHLING & ROBERTSON, INC.

Engineering Stability Since 1881

10909 Houser Drive

Fredericksburg, Virginia 22408 T 804-264-2701 I F 804-264-7862

Corporate HQ: 3015 Dumbarton Road Richmond, Virginia 23228 T 804.264.2701 F 804.264.1202 www.fandr.com

A Minority-Owned Business

-0126 December 22, 2014

Mr. Case Smeenk KCI Engineering of New York, PC 255 East Avenue Suite 302 Rochester, New York 14604

Reference: Culpeper National Cemetery 305 US Avenue Culpeper, Virginia

Dear Mr. Smeenk:

The purpose of this study is to present the final results of the subsurface exploration program and geotechnical engineering evaluation undertaken by Froehling & Robertson, Inc. (F&R) in connection with the Culpeper National Cemetery in Culpeper, Virginia. Our services were performed in general accordance with F&R Proposal No. 1574-00073 dated July 24, 2014 as authorized by you. The attached report presents our understanding of the project, reviews our exploration procedures, describes existing site and general subsurface conditions, and presents our geotechnical evaluations and recommendations.

We have enjoyed working with you on this project, and we are prepared to assist you with the recommended quality assurance monitoring and testing services during construction. Please contact us if you have any questions regarding this report or if we may be of further service.

Sincerely, FROEHLING & ROBERTSON, INC.

Jolie A. Erickson, E.I.T. Caleb M. Lange, P.E.

Staff Engineer Geotechnical Engineer

Reviewed by: Donald J. Sipher, P.E.

Senior Geotechnical Engineer

F&R File No. 74S-0126 December 22, 2014

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Site Vicinity Map (Drawing No. 1) Boring Location Plan (Drawing No. 2)

Key to Soil Classification Unified Soil Classification Chart Boring Logs

ASFE Document “Important Information about Your Geotechnical Engineering Report”

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This Executive Summary is provided as a brief overview of our geotechnical engineering evaluation for the project and is not intended to replace more detailed information contained elsewhere in this report. As an overview, this summary inherently omits details that could be very important to the proper application of the provided geotechnical design recommendations. This report should be read in its entirety prior to implementation into design and construction

The site was explored by four soil test borings performed on November 19, 2014. Site subsurface conditions generally consist of surficial soils underlain by residual soils.

We recommend that a maximum allowable bearing pressure of 1,500 pounds per square foot (psf) be used for support of any structures.

Subsurface water was not encountered at any of the borings performed for this subsurface exploration.

Auger refusal was not encountered within any of the borings performed at the site.

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The purpose of the subsurface exploration and geotechnical engineering evaluation was to explore the subsurface conditions in the area of the new crypt field at Culpeper National Cemetery and provide geotechnical engineering design and construction recommendations.

F&R’s scope of services included the following:

Completion of four soil test borings to a depth of 15 feet below the existing ground surface;

Perform infiltration testing at each of the four locations to a depth of 7 feet below the existing ground surface;

Preparation of typed Boring Logs;

Performing a geotechnical engineering evaluation of the subsurface conditions with regard to their suitability for excavation and grading purposes;

Preparation of this geotechnical report.

Our scope of services did not include a survey of the boring location, quantity estimates, preparation of plans or specifications, or the identification and evaluation of wetland or other environmental aspects of the project site.

Culpeper National Cemetery is located at 305 US Avenue in Culpeper, Virginia (Drawing 1, Appendix I). The project site consists of a landscaped, grassy area on the west side of the south section of the existing cemetery. The site topography generally slopes down from east to west.

Project information was provided by email and phone and included the design proposal dated May 23, 2014. We understand the geotechnical exploration is to be performed in support of the design required for the 3,000 pre-placed crypt conversion for Culpeper National Cemetery in Culpeper, Virginia. The plan for development includes burial crypt field installation within a 2½ acre area inside the cemetery.

Construction will include grading of the site as necessary for crypt installation and surrounding surface drainage. Subsurface information presented herein includes soil types, soil drainage capability, soil expansive qualities, and suitability of excavated onsite soil for reuse as fill.

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The exploration program was performed on November 19, 2014 and consisted of four soil test borings designated B-1 through B-4. The borings were drilled to a depth of 15 feet below existing site grades. The boring locations were provided by the client and staked in the field by F&R personnel by measuring from existing site features as the provided plan indicated. The approximate locations of the borings are shown on the attached boring location plan (Drawing No.

2, Appendix I). In consideration of the methods used in their determination, the boring locations shown on the attached boring location plan should be considered approximate.

The soil test borings were performed in accordance with generally accepted practice using a truck-mounted CME-55 rotary drill rig, equipped with an automatic hammer. Hollow-stem augers were advanced to pre-selected depths, the center plug was removed, and representative soil samples were recovered with a standard split-spoon sampler (1 3/8 in. ID, 2 in. OD) in general accordance with ASTM D 1586, the Standard Penetration Test. For these tests, a weight of 140 pounds is freely dropped from a height of 30 inches to drive the split-spoon sampler into the soil. The number of blows required to drive the split-spoon sampler three consecutive 6-inch increments is recorded, and the blows of the last two increments are summed to obtain the Standard Penetration Resistance (N-value). The N-value provides a general indication of in-situ soil conditions and has been correlated with certain engineering properties of soils.

An automatic hammer was used to perform the Standard Penetration Test (SPT) on this project.

Research has shown that the Standard Penetration Resistance (N-value) determined by an automatic hammer is different than the N-value determined by the safety hammer method. Most correlations that are published in the technical literature are based on the N-value determined by the safety hammer method. This is commonly termed N60 as the rope and cathead with a safety hammer delivers about 60 percent of the theoretical energy delivered by a 140-pound hammer freely falling 30 inches. Several researchers have proposed correction factors for the use of hammers other than the safety hammer to correct the values to be equivalent to the safety hammer SPT N60-values. The correction is made using the following equation:

N60 = Nfield x CE

Nfield is the value recorded in the field and CE is the energy ratio for the hammer utilized in the field. The guidelines provided in the Performance and Use of the Standard Penetration Test in Geotechnical Engineering Practice manual, published by the Center for Geotechnical Practice and Research at the Virginia Polytechnic Institute and State University, recommend that a correction