This report presents the findings of the subsurface exploration concerning the design of the taxiway rehabilitation. Description

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1 September 22, 2016 American Infrastructure Development, Inc Northdale Boulevard, Suite 170 Tampa, Florida Attn: Mr. Mohsen Mohammadi, Ph.D., P.E. Senior Consultant Mob: (813) Re: Geotechnical Engineering Services SRQ Airport Runway Incursion Mitigation 6000 Airport Circle Manatee County, Florida Project Number: HC Dear Dr. Mohammadi: Terracon Consultants, Inc. (Terracon) has completed the geotechnical engineering services for the above referenced project. This study was performed in general accordance with Terracon Proposal No. PHC165021, Revision 1 which was incorporated into a Letter Agreement (AID) dated June 30, This report presents the findings of the subsurface exploration concerning the design of the taxiway rehabilitation. 1.0 PROJECT INFORMATION 1.1 Project Description Item Proposed Construction Grading Description The existing Taxiway A5 and paved area adjacent to the north of Taxiway A5 are to be demolished We have assumed site grades are to remain relatively unchanged 1.2 Site Location and Description Location Item Description The Sarasota-Bradenton International Airport located at 6000 Airport Circle in Manatee County, Florida Terracon Consultants, Inc Vico Court, Unit B Sarasota, Florida P [941] F [941] terracon.com

2 Geotechnical Engineering Report SRQ Airport Runway Incursion Mitigation Manatee County, Florida September 22, 2016 Terracon Project No. HC Item Existing improvements Current ground cover Existing topography Description An airport with asphalt paved taxiways and runways Asphalt Pavement Based on the USGS Topographic Map for Bradenton, FL, dated 1994, the site appears to be at an elevation of approximately +25 feet-ngvd. 2.0 SUBSURFACE CONDITIONS 2.1 Soil Survey The Soil Survey of Manatee County, Florida (i.e. Soil Survey), issued April 1983 and published by the Soil Conservation Service (U.S. Department of Agriculture), was reviewed to determine the surficial soil map units at this site. The soil survey, which is shown on Exhibit A-2 in Appendix A, indicates the site is mapped with Soil Unit 20, EauGallie fine sand. EauGallie fine sand is comprised of nearly-level, poorly drained soil in broad areas of flatwoods. The typical soil profile consists of fine sand to a depth of 42 inches and underlain by loamy fine sand to a depth of 65 inches. Additionally, there is a layer of black, organic coated fine sand with an organic content of 2 to 8 percent at depths ranging from 28 to 42 inches bgs. Under natural (pre-development) conditions, the Seasonal High Groundwater Table (SHGWT) is reported to lie at a depth of less than 10 inches below the land surface (bgs) for 2 to 4 months of the year. It should be noted that the Soil Survey is not intended as a substitute for site-specific geotechnical exploration; rather it is a useful tool in planning a project scope in that it provides information on soil types likely to be encountered. 2.2 Field Exploration Description The subsurface conditions of the site were explored with four (4) asphalt pavement cores and subsequent hand auger borings. The asphalt was cored using an electric machine with a 6-inch diameter barrel. Asphalt cores retrieved from the barrel were labeled and transported to our laboratory for thickness measurements. The core holes were drilled to a maximum depth of about 4 ½ feet bgs using hand turned bucket-type augering equipment. Grab samples of the pavement base and subgrade materials were collected from the auger bucket, placed in labeled glass jars, and transported to our laboratory for visual-manual classification by a geotechnical engineer. The boreholes were backfilled with soil cuttings and capped with about 6-inches of cold mix asphalt patch. Responsive Resourceful Reliable 2

3 Geotechnical Engineering Report SRQ Airport Runway Incursion Mitigation Manatee County, Florida September 22, 2016 Terracon Project No. HC The locations of the borings are indicated on the Boring Location Plan as Exhibit A-3. Conditions encountered at each boring location are indicated on the boring logs shown on Exhibits A-4 through A-7 and photographs of the pavement cores are shown on Exhibits A-8 and A Pavement Cores The pavement core thicknesses are summarized in the table below: Boring No. Asphalt Thickness (inches) Base Thickness (inches) Stabilized Subgrade Thickness (inches) C-1 4 ¼ 17 ¾ (limerock base) 12 C-2 2 ¾ - 9 ¼ C ½ (sand-asphalt base) 7 C-4 2 ⅜ 2 (sand-asphalt base) 5 ⅝ Photographs of the cores are provided on Exhibits A-8 and A Typical Profile Based on the results of the borings, subsurface conditions on the project site can be generalized as follows: Stratum Approximate Depth to Bottom of Stratum Material Description AC 2 ⅜ to 4 ¼ inches Asphaltic Concrete B 1.8 feet Limerock base AB 0.4 to 0.7 feet Sand-asphalt base to 2.8 feet 2, to 4.7 feet Slightly silty fine SAND, with limerock and shell fragments (SP-SM) (Stabilized Subgrade) Fine SAND with trace to slight amounts of silt, sometimes with organic staining (SP, SP-SM) Conditions encountered at each boring location are indicated on the individual boring logs. Stratification boundaries on the boring logs represent the approximate location of changes in soil types; in-situ, the transition between materials may be gradual. Details for the borings can be found on the boring logs as Exhibits A-4 through A-7. Responsive Resourceful Reliable 3

4 Geotechnical Engineering Report SRQ Airport Runway Incursion Mitigation Manatee County, Florida September 22, 2016 Terracon Project No. HC Groundwater The depth to the groundwater was measured in the borings during drilling and was at about 4 feet bgs. It should be noted that the groundwater measurements can be influenced by the drilling process and ambient weather conditions which have been seasonably wet. A shallow water table condition should be considered for general planning, design, and construction purposes. 3.0 GENERAL COMMENTS The information presented in this report is based upon the data obtained from the boring performed at the indicated locations and from other information discussed in this report. This report does not reflect variations that may occur between borings, across the site, or due to the modifying effects of construction or weather. The nature and extent of such variations may not become evident until during or after construction. If variations appear, we should be immediately notified so that further evaluation and supplemental recommendations can be provided. The scope of services for this project does not include either specifically or by implication any environmental or biological (e.g., mold, fungi, and bacteria) assessment of the site or identification or prevention of pollutants, hazardous materials or conditions. If the owner is concerned about the potential for such contamination or pollution, other studies should be undertaken. This report has been prepared for the exclusive use of our client for specific application to the project discussed and has been prepared in accordance with generally accepted geotechnical engineering practices. No warranties, express or implied, are intended or made. Site safety, excavation support, and dewatering requirements are the responsibility of others. In the event that changes in the nature, design, or location of the project as outlined in this report are planned, the conclusions and recommendations contained in this report shall not be considered valid unless Terracon reviews the changes and either verifies or modifies the conclusions of this report in writing. Responsive Resourceful Reliable 4

SITE SCALE 1:24 000 1.5 0 KILOMETERS 1 2 1000 0 METERS 1000 2000 1.

6 SITE SCALE 1: KILOMETERS METERS MILES N CONTOUR INTERVAL: 5 FEET NATIONAL GEODETIC VERTICAL DATUM OF 1929 BRADENTON, FL MINUTE SERIES (TOPOGRAPHIC) Project Mngr: Drawn By: Checked By: Approved By: JJ DV JJ DD Project No. HC TOPOGRAPHIC VICINITY MAP GEOTECHNICAL ENGINEERING REPORT SRQ AIRPORT RUNWAY INCURSION MITIGATION EXHIBIT Scale: AS-SHOWN File No. Consulting Engineers and Scientists HC Date: 8260 VICO COURT, UNIT B SARASOTA, FL SARASOTA-BRADENTON INTERNATIONAL AIRPORT A PH. (941) FAX. (941) MANATEE COUNTY, FLORIDA

SITE 20 SCALE 1" = 160' 80 0 80 160 240 320 400 480 560 640 720 800 U.S.D.A. SOIL SURVEY FOR MANATEE COUNTY, FLORIDA ISSUED: APRIL 1983 N SOIL LEGEND 20 EAUGALLIE FINE SAND Project Mngr: Drawn By: Checked By: Approved By: JJ DV JJ DD Project No.

7 SITE 20 SCALE 1" = 160' U.S.D.A. SOIL SURVEY FOR MANATEE COUNTY, FLORIDA ISSUED: APRIL 1983 N SOIL LEGEND 20 EAUGALLIE FINE SAND Project Mngr: Drawn By: Checked By: Approved By: JJ DV JJ DD Project No. Scale: File No. Date: HC AS-SHOWN HC Consulting Engineers and Scientists 8260 VICO COURT, UNIT B SARASOTA, FL PH. (941) FAX. (941) SOILS MAP GEOTECHNICAL ENGINEERING REPORT SRQ AIRPORT RUNWAY INCURSION MITIGATION SARASOTA-BRADENTON INTERNATIONAL AIRPORT MANATEE COUNTY, FLORIDA EXHIBIT A-2

N C-1 C-4 C-2 C-3 SOURCE: GOOGLE EARTH PRO C-1 APPROXIMATE LOCATION OF PAVEMENT CORE AND HAND AUGER BORING Project Mngr: Drawn By: Checked By: Approved By: JJ DV JJ DD Project No. Scale: File No.

8 N C-1 C-4 C-2 C-3 SOURCE: GOOGLE EARTH PRO C-1 APPROXIMATE LOCATION OF PAVEMENT CORE AND HAND AUGER BORING Project Mngr: Drawn By: Checked By: Approved By: JJ DV JJ DD Project No. Scale: File No. Date: HC SCALE IN FEET BORING LOCATION PLAN GEOTECHNICAL ENGINEERING REPORT SRQ AIRPORT RUNWAY INCURSION MITIGATION EXHIBIT AS-SHOWN Consulting Engineers and Scientists HC VICO COURT,UNIT B SARASOTA, FL SARASOTA-BRADENTON INTERNATIONAL AIRPORT A PH. (941) FAX. (941) MANATEE COUNTY, FLORIDA

9 PROJECT: SRQ Airport Runway Incursion Mitigation BORING LOG NO. C-1 American Infrastructure CLIENT: Development, Inc. Page 1 of 1 THIS BORING LOG IS NOT VALID IF SEPARATED FROM ORIGINAL REPORT. GEO SMART LOG-NO WELL HC SRQAIRPORT.RUNWAYINCURSIONMITIGATION.GPJ TERRACON2015.GDT 9/22/16 SITE: GRAPHIC LOG LOCATION DEPTH ASPHALTIC CONCRETE Airport Circle Manatee County, Florida LIMEROCK BASE, light brown SLIGHTLY SILTY FINE SAND (SP-SM) (Stabilized Subgrade), with limestone and shell fragments, fine grained, dark gray-brown SAND WITH TRACE AMOUNTS OF SILT (SP), fine grained, brown to light brown Boring Terminated at 4 Feet Stratification lines are approximate. In-situ, the transition may be gradual. Advancement Method: HAND AUGER See Exhibit A-3 Latitude: Longitude: Abandonment Method: Borings backfilled with soil cuttings upon completion. WATER LEVEL OBSERVATIONS Groundwater initially observed at a depth of 4.0 feet bgs 8260 Vico Ct Unit B Sarasota, FL Tampa, Florida Notes: Boring Started: 9/16/2016 Drill Rig: Project No.: HC Boring Completed: 9/16/2016 Driller: JD Exhibit: A-4 DEPTH (Ft.) WATER LEVEL OBSERVATIONS SAMPLE TYPE

10 THIS BORING LOG IS NOT VALID IF SEPARATED FROM ORIGINAL REPORT. GEO SMART LOG-NO WELL HC SRQAIRPORT.RUNWAYINCURSIONMITIGATION.GPJ TERRACON2015.GDT 9/22/16 PROJECT: SRQ Airport Runway Incursion Mitigation SITE: GRAPHIC LOG LOCATION DEPTH ASPHALTIC CONCRETE 0.2 SLIGHTLY SILTY FINE SAND (SP-SM) (Stabilized Subgrade) (SP-SM), with limestone and shell fragments, fine grained, dark gray Airport Circle Manatee County, Florida SLIGHTLY SILTY FINE SAND (SP-SM), fine grained, gray to light brown Boring Terminated at 4 Feet Stratification lines are approximate. In-situ, the transition may be gradual. Advancement Method: HAND AUGER See Exhibit A-3 Latitude: Longitude: Abandonment Method: Borings backfilled with soil cuttings upon completion. WATER LEVEL OBSERVATIONS Groundwater initially observed at a depth of 3.9 feet bgs BORING LOG NO. C Vico Ct Unit B Sarasota, FL American Infrastructure CLIENT: Development, Inc. Tampa, Florida Notes: Boring Started: 9/16/2016 Drill Rig: Project No.: HC Driller: JD Page 1 of 1 Boring Completed: 9/16/2016 Exhibit: A-5 DEPTH (Ft.) WATER LEVEL OBSERVATIONS SAMPLE TYPE

11 THIS BORING LOG IS NOT VALID IF SEPARATED FROM ORIGINAL REPORT. GEO SMART LOG-NO WELL HC SRQAIRPORT.RUNWAYINCURSIONMITIGATION.GPJ TERRACON2015.GDT 9/22/16 PROJECT: SRQ Airport Runway Incursion Mitigation SITE: GRAPHIC LOG LOCATION DEPTH ASPHALTIC CONCRETE Airport Circle Manatee County, Florida SAND-ASPHALT BASE SLIGHTLY SILTY FINE SAND (SP-SM) (Stabilized Subgrade) (SP-SM), with limestone and shell fragments, fine grained, dark gray-brown SLIGHTLY SILTY FINE SAND (SP-SM), trace roots, fine grained, gray-brown to gray Boring Terminated at 4 Feet Stratification lines are approximate. In-situ, the transition may be gradual. Advancement Method: HAND AUGER See Exhibit A-3 Latitude: Longitude: Abandonment Method: Borings backfilled with soil cuttings upon completion. WATER LEVEL OBSERVATIONS Groundwater initially observed at a depth of 3.6 feet bgs BORING LOG NO. C Vico Ct Unit B Sarasota, FL American Infrastructure CLIENT: Development, Inc. Tampa, Florida Notes: Boring Started: 9/16/2016 Drill Rig: Project No.: HC Driller: JD Page 1 of 1 Boring Completed: 9/16/2016 Exhibit: A-6 DEPTH (Ft.) WATER LEVEL OBSERVATIONS SAMPLE TYPE

THIS BORING LOG IS NOT VALID IF SEPARATED FROM ORIGINAL REPORT. GEO SMART LOG-NO WELL HC165021.SRQAIRPORT.RUNWAYINCURSIONMITIGATION.GPJ TERRACON2015.

12 THIS BORING LOG IS NOT VALID IF SEPARATED FROM ORIGINAL REPORT. GEO SMART LOG-NO WELL HC SRQAIRPORT.RUNWAYINCURSIONMITIGATION.GPJ TERRACON2015.GDT 9/22/16 PROJECT: SRQ Airport Runway Incursion Mitigation SITE: GRAPHIC LOG LOCATION DEPTH ASPHALTIC CONCRETE 0.2 SAND-ASPHALT BASE 0.4 SLIGHTLY SILTY FINE SAND (SP-SM) (Stabilized Subgrade) (SP-SM), with limestone and shell fragments, fine grained, dark gray Airport Circle Manatee County, Florida SLIGHTLY SILTY FINE SAND (SP-SM), fine grained, gray to dark gray SLIGHTLY SILTY FINE SAND (SP-SM), organic stained, fine grained, dark gray to dark brown Boring Terminated at 4.7 Feet Stratification lines are approximate. In-situ, the transition may be gradual. Advancement Method: HAND AUGER See Exhibit A-3 Latitude: Longitude: Abandonment Method: Borings backfilled with soil cuttings upon completion. WATER LEVEL OBSERVATIONS Groundwater not encountered BORING LOG NO. C Vico Ct Unit B Sarasota, FL American Infrastructure CLIENT: Development, Inc. Tampa, Florida Notes: Boring Started: 9/16/2016 Drill Rig: Project No.: HC Driller: JD Page 1 of 1 Boring Completed: 9/16/2016 Exhibit: A-7 DEPTH (Ft.) WATER LEVEL OBSERVATIONS SAMPLE TYPE

Geotechnical Engineering Report SRQ Airport Runway

Core #2 photo shows 2 ¾ of asphalt pavement.

13 Geotechnical Engineering Report SRQ Airport Runway Incursion Mitigation Manatee County, Florida September 22, 2016 Terracon Project No. HC Core #1 photo shows 4 ¼ of asphalt pavement. Core #2 photo shows 2 ¾ of asphalt pavement. Core #3 photo shows 3 of asphalt pavement and 5 ½ of sand-asphalt base. Core #4 photo shows 2 ⅜ of asphalt pavement and 2 of sand-asphalt base. Responsive Resourceful Reliable Exhibit A-8

14 Geotechnical Engineering Report SRQ Airport Runway Incursion Mitigation Manatee County, Florida September 22, 2016 Terracon Project No. HC Overview of Cores C-1 through C-4 Responsive Resourceful Reliable Exhibit A-9

April 7, Webster Street Sub-Surface Stormwater Storage System Bid No Bid Date: 4/13/17 ADDENDUM NO 1

April 7, Webster Street Sub-Surface Stormwater Storage System Bid No Bid Date: 4/13/17 ADDENDUM NO 1 PUBLIC WORKS DEPARTMENT David A. Jones, P.E., Director April 7, 2017 Webster Street Sub-Surface Stormwater Storage System Bid No. 2017-022 Bid Date: 4/13/17 ADDENDUM NO 1 Please make the following changes