PSI Geotechnical Report - Bid Room

March 28, 2011

Mr. Steve Peterie Mr. Curt McNay O'Reilly Auto Parts 233 South Patterson Road PO Box 1156 Springfield, Missouri 65802

RE: Geotechnical Exploration and Engineering Report Proposed O'Reilly Auto Parts Store 901 Division Street Parkersburg, Wood County, West Virginia PSI Project No. 0130327

Gentlemen:

In compliance with your instructions, Professional Service Industries, Inc. (PSI) has developed a geotechnical engineering report for the referenced project. The results of this exploration, together with our recommendations, are presented in the accompanying report, a copy of which is being transmitted herewith.

PSI appreciates the opportunity to provide geotechnical engineering and consulting services for your project and looks forward to working with you. PSI provides additional consulting services, which include construction materials testing and observation services, environmental services, roof consulting and observation services, pavement and asphalt testing services and specialty engineering and testing. If you have any questions regarding this report, or if we may be of further service, please feel free to contact this office at your convenience.

Respectfully,

PROFESSIONAL SERVICE INDUSTRIES, INC.,

Timothy M. Kerby Branch Manager

Paul S. Hundley, P.E. Regional Engineer

Professional Service Industries, Inc. 153 Williams Highway Parkersburg, WV 26105 Phone 304-295-1016 Fax 304-295-9658

GEOTECHNICAL EXPLORATION AND ENGINEERING REPORT

FOR THE: PROPOSED O'REILLY AUTO PARTS STORE

901 DIVISION STREET PARKERSBURG, WOOD COUNTY, WEST VIRGINIA

PREPARED FOR: O'REILLY AUTO PARTS 233 SOUTH PATTERSON ROAD

PO BOX 1156 SPRINGFIELD, MISSOURI 65802

PREPARED BY: PROFESSIONAL SERVICE INDUSTRIES, INC.

1532 WILLIAMS HIGHWAY PARKERSBURG, WEST VIRGINIA

MARCH 28, 2011 PSI PROJECT NO. 0130327

TABLE OF CONTENTS

PROJECT INFORMATION........................................................................................................... 1

PROJECT AUTHORIZATION...........................................................................................................1 PROJECT DESCRIPTION ..............................................................................................................1 PURPOSE AND SCOPE OF SERVICES............................................................................................1

SITE AND SUBSURFACE CONDITIONS ..................................................................................... 2

SITE LOCATION AND DESCRIPTION ..............................................................................................2 FIELD EXPLORATION AND LABORATORY TESTING.........................................................................2 SUBSURFACE CONDITIONS..........................................................................................................3 GROUNDWATER INFORMATION ....................................................................................................3 SITE SEISMIC CLASSIFICATION ....................................................................................................4

EVALUATION AND RECOMMENDATIONS ............................................................................... 4

SITE PREPARATION.....................................................................................................................4 FOUNDATION RECOMMENDATIONS ..............................................................................................5 FLOOR SLAB...............................................................................................................................6 PAVEMENT SECTION RECOMMENDATIONS ...................................................................................7 DUMPSTER PAD FOUNDATIONS ....................................................................................................9

CONSTRUCTION CONSIDERATIONS ..................................................................................... 10 DRAINAGE AND GROUNDWATER CONSIDERATIONS ....................................................................10 EXCAVATION SAFETY CONSIDERATIONS ....................................................................................10

REPORT LIMITATIONS .............................................................................................................11

APPENDIX

Figure 1 ? Site Vicinity Map Figure 2 ? Boring Location Diagram Test Boring Logs (B-1 through B-6) Soil Classification Chart PSI General Notes

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GEOTECHNICAL EXPLORATION AND ENGINEERING REPORT PROPOSED O'REILLY AUTO PARTS STORE 901 DIVISION STREET

PARKERSBURG, WOOD COUNTY, WEST VIRGINIA

PROJECT INFORMATION

Project Authorization

This report presents the results of our geotechnical engineering exploration performed relative to the proposed construction of an O'Reilly Auto Parts store to be located at 901 Division Street in Parkersburg, Wood County, West Virginia. This exploration was performed for O'Reilly Auto Parts.

The services for this project were performed in accordance to the O'Reilly Auto Parts Work Order Form, dated December 30, 2010. The Work Order included a proposed scope of services, Boring Location Plan and time schedule. Authorization to perform this exploration and analysis was in the form of a Master Services Agreement between PSI and O'Reilly Auto Parts, dated March 08, 2011.

Project Description

PSI understands that it is envisioned to construct a new O'Reilly Auto Parts Store along the west side of 901 Division Street in Parkersburg, Wood County, West Virginia. The structure will be a single-story, steel-frame structure with a concrete slab-on-grade and will encompass approximately 9,000 square feet in plan area that will be generally located along the western side of the project site (near the middle of the property).

Based on the structural loads from similar projects, we anticipate the proposed store will require foundations to support individual column and bearing wall loads of up to 30 kips and 1 kip per linear foot, respectively. Ground surface elevations at the boring locations ranged from about 637 to 639 ft. MSL. As such, "cuts" and "fills" less than 2 feet are expected in order to achieve the design grades. If any of the information noted above is incorrect or has changed, PSI must be informed immediately so that the recommendations may be reviewed and revised as necessary.

Purpose and Scope of Services

The purpose of this exploration was to evaluate the subsurface conditions at the site and to develop geotechnical design criteria for support of foundations and pavements for the planned project. The scope of the exploration and analysis included a reconnaissance of the project site, completion of six (6) soil borings, field and laboratory testing of recovered samples and an engineering analysis and evaluation of the subsurface materials encountered.

The scope of services did not include an environmental assessment for determining the presence or absence of wetlands or hazardous or toxic materials in the soil, bedrock, surface water, groundwater or air on, below or around this site. Any statements in this report or on the boring logs regarding odors, colors or unusual or suspicious items or conditions are strictly for the information

PSI Project No. 0130327

Proposed O'Reilly Auto Parts Store Parkersburg, Wood County, West Virginia

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of O'Reilly Auto Parts. A Phase 1 Environmental Site Assessment was conducted by Commonwealth Environmental Associates, Inc. and the report is dated February 17, 2011. The report indicates that no evidence of environmental conditions which could have an impact on this project was discovered.

As directed by the scope of work provided by O'Reilly Auto Parts, PSI did not provide any service to investigate or detect the presence of moisture, mold or other biological contaminates in or around any structure, or any service that was designed or intended to prevent or lower the risk of the occurrence or the amplification of the same. O'Reilly Auto Parts acknowledges that mold is ubiquitous to the environment with mold amplification occurring when building materials are impacted by moisture. O'Reilly Auto Parts further acknowledges that site conditions are outside of PSI's control, and that mold amplification will likely occur, or continue to occur, in the presence of moisture. As such, PSI cannot and shall not be held responsible for the occurrence or recurrence of mold amplification.

SITE AND SUBSURFACE CONDITIONS

Site Location and Description

The project site is located along the east side of Division Street in Parkersburg, West Virginia. Specifically, the site is located at 1901 Division Street. The site consists of a total of approximately 0.757 acres. The site is occupied by a gravel parking lot. Concrete fragments were also noted to be observed across the site.

The surface of the site is relatively flat with surface drainage on the site appearing to trend toward catch basins within the existing parking lot. The surface of the site was relatively firm at the time of field operations and the truck-mounted drilling equipment experienced little difficulty in moving between boring locations.

Field Exploration and Laboratory Testing

The site subsurface conditions were determined by completion of six (6) soil test borings advanced to depths of approximately 15 feet below existing grade. The boring locations and depths were established by O'Reilly Auto Parts and provided to PSI on a drawing titled "Parkersburg, West Virginia", dated March 7, 2011. The test borings were located in the field by PSI using conventional measuring procedures referencing existing site features. The approximate boring locations are depicted on the Boring Location Diagram included in the Appendix. Ground surface elevations at the boring locations were interpolated from a drawing entitled "ALTA/ACSM Land Title/Topographic/Tree Survey" which was prepared by Bayer Becker dated February 11, 2011.

The borings were completed by means of a truck-mounted drilling rig equipped with a rotary head, utilizing 3? inch, hollow-stem augers to advance the boreholes. Representative samples were recovered employing split-barrel sampling procedures in general accordance with "Penetration Test and Split-Barrel Sampling of Soils" (ASTM D1586). After completion of the test borings, the drill holes were backfilled with the excavated soils.

PSI Project No. 0130327

Proposed O'Reilly Auto Parts Store Parkersburg, Wood County, West Virginia

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Free groundwater level measurements were recorded in each test boring during and after completion of drilling operations and removal of the augers. Groundwater levels are noted on the boring logs that are presented in the Appendix. Seasonal variations may influence the depths to the groundwater, and groundwater quantities and flow volumes will largely depend on the permeability of the soil profile.

In addition to the field exploration, a laboratory-testing program was conducted to evaluate engineering characteristics of the subsurface materials. The laboratory-testing program included visual classification of all samples and moisture content tests on selected samples. Unconfined compressive strengths for selected cohesive samples were estimated using a calibrated spring penetrometer. All phases of the laboratory-testing program were conducted in general accordance with applicable ASTM specifications. The results of these tests are to be found on the boring logs that are included in the Appendix.

Subsurface Conditions

At the time of our field exploration, the ground surface at the boring locations was generally covered with about 3 to 10 inches of gravel and concrete fragments. At Boring B-6, a broken section of concrete slab (having a thickness of 5 inches) was encountered below the uppermost 3 inches of gravel.

Below the surficial gravel and concrete fragments, old fill materials were encountered (at Boring B-1 only) which extend to a depth of approximately 5'8" below the surface grade. The natural soil profile consists of brown and gray silty clay and clayey silt which extends through the termination depths of the borings. The silty clay / clayey silt soils possess firm to stiff consistencies (as evidenced by Standard Penetration Test values which range between 4 and 13 blows per foot) throughout the explored depth.

The above subsurface descriptions are of a generalized nature, and are provided to highlight the major soil strata encountered. The boring logs included in the Appendix should be reviewed for specific information as to individual boring locations. The stratification shown on the boring logs represent the conditions only at the actual boring locations. Variations may occur and should be expected between boring locations. The stratification represents the approximate boundary between subsurface materials; however, the actual transition may be gradual, abrupt, or not clearly defined. In the absence of foreign substances, it is difficult to distinguish between native soils and clean fill soil.

Groundwater Information

Groundwater was encountered in three (3) of the borings at a depth of about 8 to 9 feet below existing grade both during and upon completion of the drilling operations. The groundwater observations presented in this report represent conditions at the time of the field activities. Groundwater levels on this site are likely to vary as a result of seasonal conditions, and fluctuations should be anticipated. It is recommended that the contractor determine the actual groundwater levels at the time of the construction to evaluate groundwater impact on construction procedures.

PSI Project No. 0130327

Proposed O'Reilly Auto Parts Store Parkersburg, Wood County, West Virginia

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Site Seismic Classification

Please note that the project site is located in a municipality that employs the International Building code (IBC), 2006 edition. As part of this code, the design of structures must consider dynamic forces resulting from seismic events. These forces are dependent upon the magnitude of the earthquake event as well as the properties of the soils that underlie the site.

Part of the IBC code procedure to evaluate seismic forces requires the evaluation of the Seismic Site Class, which categorizes the site based upon the characteristics of the subsurface profile within the upper 100 feet of the ground surface.

To define the Seismic Site Class for this project, we have interpreted the results of our soil test borings drilled within the project site. Based upon our evaluation, it is our opinion that the subsurface conditions within the site are consistent with the characteristics of the Specific Site Class E as defined in Table 1613.5.2 of the building code.

EVALUATION AND RECOMMENDATIONS

Site Preparation

Old fill (as encountered at Boring B-1) will generally undergo high and variable volume changes when subjected to loads, resulting in detrimental performance of pavements, floor slabs, structural fills and shallow foundations placed on them. It is recommended that all uncontrolled fills and any existing pavements or other subsurface structures be stripped from the construction areas and wasted or stockpiled for later use. The thickness of these materials is likely to vary throughout the site and other, possibly more extensive, deposits could be encountered during the sitework activities. The exact depth of removal of these soils should be determined by PSI during the stripping activities.

The following Table depicts the approximate stripping depths at each site in order to encounter suitable, natural soils:

Boring No.

Approximate Minimum Stripping Depth To Encounter Suitable Natural Soils (ft.)*

B-1

5'8"

B-2

1

B-3

1

B-4

1

B-5

1

B-6

1

*As measured below existing grade.

After the old fill has been removed from the areas of construction and any cut sections are performed, the upper 12 inches of the exposed subgrade must be compacted to 95 percent of the maximum dry density as determined in accordance with ASTM Method D-698 (Standard

PSI Project No. 0130327

Proposed O'Reilly Auto Parts Store Parkersburg, Wood County, West Virginia

____________________________________________________________________________ 5

Proctor). Any unsuitable areas must be removed and replaced with engineered fill or stabilized using other suitable methods prior to backfilling the excavation.

After the subgrade has been compacted and stabilized, any engineered fill required to achieve the planned finished soil subgrade may then be placed. Engineered fill should consist of inert material that is hard, durable, free from organic matter, surface coatings and deleterious materials. The fill should have a maximum particle size of 2 inches, a maximum liquid limit of 40 percent and a maximum plasticity index of less than 20 percent, as per ASTM D-4318. The fill should have a standard Proctor maximum dry density greater than 112 pounds per cubic foot (pcf). Samples of the proposed fill materials should be tested and evaluated by PSI prior to placement.

Proper control of the placement and compaction of engineered fills should be monitored by PSI. The new materials should be free of organic matter and placed in individual lifts not exceeding 8 inches in loose thickness. Each lift is to be compacted to 95 percent of the maximum dry density within three (3) percent of the optimum moisture content as determined in accordance with ASTM Method D-698 (Standard Proctor). A sufficient number of in-place density tests should be performed on each lift of the fill. The tests should be performed in accordance with appropriate ASTM procedures.

Considering that previous structures have occupied the site, it is possible that areas of fill and/or buried topsoil deposits that were not identified by the boring program could be encountered at this site. Additionally, it is possible that buried demolition debris and rubble may be encountered. Where any organic, soft or otherwise unsuitable soils (including old fill and debris materials) are identified, they should be completely removed and replaced with engineered fill. Any non-organic fill soils that are encountered should be characterized with respect to the structural application that they will be subjected to before they are utilized as fill or allowed to remain in place. Additional soil borings and/or test pits may be required to evaluate uncontrolled fill soils.

Foundation Recommendations

Considering the site subsurface conditions, recommended site preparation activities, and the proposed construction, it is recommended that the proposed O'Reilly Auto Parts store be founded on conventional spread and continuous wall footings founded on the native silty clay / clayey silt soils (which have been recompacted as described below) encountered below the old fills in the soil borings. Estimated total settlements should be less than 1 inch with differential settlement of ? of the total settlement provided the following design and construction details are incorporated.

Footings should bear on the native silty clay / clayey silt soils which have been recompacted or on newly placed and compacted engineered fill placed used to replace any deleterious fill (or buried topsoil) encountered below the foundation bearing elevation. Based on the information obtained in the soil borings, it is anticipated that the old fill soils will be completely removed during excavation for the foundation elements. Any undocumented fill and buried debris must be removed from below foundation elements prior to foundation installation. Interior and exterior continuous wall and column footings may be proportioned for a net allowable soil bearing pressure of up to 2,000 pounds per square foot where they bear directly on native soils or on

PSI Project No. 0130327

Proposed O'Reilly Auto Parts Store Parkersburg, Wood County, West Virginia

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