Geotechnical Exploration Report The Freese Center State Route 598 Galion, Ohio 44833 Prepared for Galion Port Authority P.O. Box 761 Galion, Ohio 44833 Daniel E Karch, E.I. Project Manager Prepared by Professional Service Industries, Inc. 4960 Vulcan Avenue Columbus, Ohio 43228 Paul S. Hundley, P.E. July 31, 2020 Geotechnical Dept. Manager/Principal Consultant PSI Project No. 01021746 PSI Project Number: 01021746 The Freese Center July 21, 2020 TABLE OF CONTENTS 1 PROJECT INFORMATION ....................................................................................................................... 1 1.1 PROJECT AUTHORIZATION ............................................................................................................... 1 1.2 PROJECT DESCRIPTION ..................................................................................................................... 1 1.3 PURPOSE AND SCOPE OF SERVICES ................................................................................................. 2 2 SITE AND SUBSURFACE CONDITIONS .................................................................................................... 4 2.1 SITE LOCATION AND DESCRIPTION .................................................................................................. 4 2.2 SITE GEOLOGY .................................................................................................................................. 4 2.3 SUBSURFACE CONDITIONS .............................................................................................................. 5 2.4 WATER LEVEL MEASUREMENTS ...................................................................................................... 6 2.5 LABORATORY TEST RESULTS ............................................................................................................ 6 3 GEOTECHNICAL EVALUATION ............................................................................................................... 8 3.1 GEOTECHNICAL DISCUSSION ........................................................................................................... 8 4 GEOTECHNICAL RECOMMENDATIONS ................................................................................................ 10 4.1 SITE PREPARATION ......................................................................................................................... 10 4.2 FOUNDATION RECOMMENDATIONS ............................................................................................. 12 4.2.1 SHALLOW FOUNDATIONS ............................................................................................ 12 4.2.2 INTERMEDIATE FOUNDATION SYSTEM – AGGREGATE PIERS OR CONTROLLED MODULUS COLUMNS .................................................................................................. 13 4.2.3 ACIP PILES .................................................................................................................... 14 4.3 EARTHQUAKE AND SEISMIC DESIGN CONSIDERATION ................................................................. 15 4.4 FLOOR SLAB RECOMMENDATIONS ................................................................................................ 16 4.5 UTILITIES TRENCHING .................................................................................................................... 17 4.6 PAVEMENT DESIGN RECOMMENDATIONS .................................................................................... 17 4.7 PAVEMENT DRAINAGE AND MAINTENANCE ................................................................................. 19 4.8 SILTATION CONTROL ...................................................................................................................... 19 5 CONSTRUCTION CONSIDERATIONS ..................................................................................................... 20 5.1 MOISTURE SENSITIVE SOILS/WEATHER RELATED CONCERNS ....................................................... 20 5.2 DRAINAGE AND GROUNDWATER CONSIDERATIONS .................................................................... 20 5.3 EXCAVATIONS ................................................................................................................................ 20 6 GEOTECHNICAL RISK .......................................................................................................................... 22 7 REPORT LIMITATIONS ........................................................................................................................ 23 APPENDIX - Site Location Map Boring Location Plan Profile Boring Logs Laboratory Test Results USGS Seismic Design Maps Physiographic Regions of Ohio Karst Mapping General Notes Unified Soil Classification Chart (USCS) www.intertek.com/building PSI Project Number: 01021746 The Freese Center July 31, 2020 Page 1 1 PROJECT INFORMATION 1.1 PROJECT AUTHORIZATION The following table summarizes, in chronological order, the Project Authorization History for the services performed and represented in this report by Professional Service Industries, Inc. (PSI). DOCUMENT AND REFERENCE DATE REQUESTED/PROVIDED BY Request for Proposal 06/22/2020 Mr. Eric Kent of Galion Port Authority Daniel Karch, Paul Hundley & Michael Mazzoli of PSI Proposal No.: 0145-304995 06/24/2020 PSI, Inc. Project Authorization 06/25/2020 Mr. Chad Miller of Galion Port Authority 1.2 PROJECT DESCRIPTION According to the provided information and documents, the project involves the proposed 1-story new building, parking lot, stormwater management areas, basketball courts, and soccer field in Galion, Ohio. The following table lists the material and information provided for this project: DESCRIPTION OF MATERIAL PROVIDER/SOURCE DATE 200709_Updated boring reference Galion Port Authority 07/12/2020 Map_2020.0712 (dated 07/12/2020) Galion Port Authority 07/12/2020 Freese Site Survey-drawing (PDF version; Galion Port Authority 07/02/2020 dated 06/17/2020) Freese Site Survey-model (DWG version) Galion Port Authority 07/02/2020 The following table lists the structural loads and site features that are estimated for the design basis for the conclusions of this report: www.intertek.com/building PSI Project Number: 01021746 The Freese Center July 31, 2020 Page 2 STURCTURAL LOAD/PROPERTY REQUIREMENT/REPORT BASIS BUILDINGS R* B* Maximum Column Loads 150 kips Maximum Wall Loads 2-3 kips/foot Finish Floor Elevations and type Slab-on-grade (~1145’ – 1147’) Maximum Floor Loads and size 100 psf Settlement Tolerances I’’ Total, ¾” Differential PAVEMENTS Standard automobile and light truck Traffic for Pavement Design traffic GRADING Planned grade variations at site, feet ± 5 ft Utility Depths N/A *“R” = Requirement indicates specific design information was supplied. “B” = Report Basis indicates specific design information was not supplied; therefore, this report is based on this parameter. The geotechnical recommendations presented in this report are based on the available project information for the proposed Freese Center project located along State Route 598 in Galion, Crawford County, Ohio, and the subsurface materials described in this report. If any of the information noted above is incorrect, please inform PSI in writing so that we may amend the recommendations presented in this report, if necessary. PSI will not be responsible for the implementation of its recommendations when it is not notified of changes in the project. 1.3 PURPOSE AND SCOPE OF SERVICES The purpose of this study was to explore the subsurface conditions at the site to prepare recommendations for foundations for the proposed construction. PSI’s contracted scope of services included drilling thirteen (13) soil test borings at the site to depths ranging from 10 to 20 feet below the ground surface, select laboratory testing, and preparation of this geotechnical report. This report briefly outlines the testing procedures, presents available project information, describes the site and subsurface conditions, and presents recommendations regarding the following: • A general assessment of area geology based on our local knowledge and study of available geological literature; • Site preparation as needed for support of foundations and slabs; • Foundation system evaluations and the assessment of the feasibility of utilizing shallow or intermediate foundations; • General location, description of materials encountered in the borings which may interfere with construction progress or structure performance, including existing fills, cobbles/boulders, or organic soils; • Design parameters required for the foundation system, including allowable bearing pressure, minimum foundation width, and foundation bearing levels; • Identification of water levels encountered at the time of drilling; • If odors, soil staining, or other visually evident indications of possible contamination are found while drilling, the client will be notified, and the conditions will be reported on the boring logs; • Identify the swell potential of surface soil based on the laboratory tests, and provide recommendations, if any, for potentially swelling soils; www.intertek.com/building PSI Project Number: 01021746 The Freese Center July 31, 2020 Page 3 • Recommendation of modulus of subgrade reaction, and analysis of the swell potential of surface soil based on index tests; • Recommendations for fill including the selection of materials for use and procedures for placement; • This report incorporating the design parameters and recommendations, with attachments including