15-Terracon ESA Standard Report - Tract 13.pdf

Phase I Environmental Site Assessment

Erv’s Vacuum

1800 East Santa Fe Street

Olathe, Johnson County, KS

September 26, 2025 | Terracon Project No. 02237230

Prepared for:

HNTB Corporation

6300 Sprint Parkway, Suite 300

Overland Park, KS

Prepared by:

Terracon Consultants, Inc.

Lenexa, Kansas

15620 W 113th St

Lenexa 66219-5102

P 913-492-7777

F 913-492-7443

Terracon.com

September 26, 2025

HNTB Corporation

6300 Sprint Parkway, Suite 300

Overland Park, KS 66211

Attn: Mr. Zach Jarchow

E: zjarchow@hntb.com

Re: Phase I Environmental Site Assessment

Erv’s Vacuum

1800 East Santa Fe Street

Olathe, Johnson County, Kansas

Terracon Project No. 02237230

Dear Mr. Jarchow:

Terracon Consultants, Inc. (Terracon) is pleased to submit the enclosed Phase I

Environmental Site Assessment (ESA) report for the above-referenced subject property

(hereinafter known as the ‘site’). This assessment was performed in accordance with

HNTB Corporation subconsultant agreement dated August 7, 2024.

We appreciate the opportunity to be of service to you on this project. In addition to ESA services, our professionals provide other environmental, geotechnical, construction materials, and facilities services on a wide variety of projects locally, regionally, and nationally. For more detailed information on all of Terracon’s services please visit our website at www.terracon.com. If there are any questions regarding this report or if we may be of further assistance, please do not hesitate to contact us.

Sincerely, Terracon Consultants, Inc.

Nidia Lazos Tracie A. Ragland

Assistant Scientist Senior Scientist

Attachments

Tracie Ragland mailto:zjarchow@hntb.com http://www.terracon.com/

Erv’s Vacuum | Olathe, KS

Facilities | Environmental | Geotechnical | Materials

Table of Contents

Executive Summary .......................................................................................... i

Findings and Opinions ................................................................................ i

Significant Data Gaps ................................................................................. v

Conclusions .............................................................................................. v

Recommendations..................................................................................... vi

1.0 Introduction

1.1 Site Description

1.2 Scope of Services

1.3 Standard of Care

1.4 Additional Scope Limitations, ASTM Deviations, and Data Gaps

1.5 Reliance

1.6 Client Provided Information

2.0 Physical Setting

3.0 Historical Use Information

3.1 Historical Topographic Maps, Aerial Photographs, and Sanborn Maps

3.2 Historical City Directories

3.3 Site Ownership

3.4 Title Search

3.5 Environmental Liens and Activity and Use Limitations

3.6 Interviews Regarding Current and Historical Site Uses

3.7 Prior Report Review

4.0 Records Review

4.1 Federal and State/Tribal Databases

4.2 Local Agency Inquiries

5.0 Site Reconnaissance

5.1 General Site Information

5.2 Overview of Current Site Occupants

5.3 Overview of Current Site Operations

5.4 Site Observations

Facilities | Environmental | Geotechnical | Materials

6.0 Adjoining Property Reconnaissance

7.0 Additional Services

8.0 Declaration

Appendices

APPENDIX A Exhibit 1: Topographic Map, Exhibit 2: Site Diagram

APPENDIX B Site Photographs

APPENDIX C Historical Documentation and User Questionnaire

APPENDIX D Environmental Database Information

APPENDIX E Credentials

Facilities | Environmental | Geotechnical | Materials i

Executive Summary

This Phase I Environmental Site Assessment (ESA) was performed in accordance with

HNTB Corporation subconsultant agreement dated August 7, 2024, and was conducted consistent with the procedures included in ASTM E1527-21, Standard Practice for

Environmental Site Assessments: Phase I Environmental Site Assessment Process. The purpose of this ESA was to assist the client in developing information to identify

Recognized Environmental Conditions (RECs) in connection with the site as reflected by the scope of this report. The ESA was conducted under the supervision or responsible charge of Tracie A. Ragland, Environmental Professional. Nidia Lazos performed the site reconnaissance on July 9, 2025.

Findings and Opinions

A summary of the findings is provided below. It should be recognized that details were not included or fully developed in this section, and the report must be read in its entirety for a comprehensive understanding of the items contained herein.

Site Description and Use

According to the Johnson County Tax Assessor, site observations, and information provided by the Client, the site consists of approximately 0.51 acres identified as KS

Uniform Parcel #0460893004006001000 and Tax Property ID #DP57900001 0001 located at 1800 East Santa Fe Street in Olathe, Kansas. The site consists of a commercial building (vacuum sales and repair), a storage shed, green spaces, a portion of North Rogers Road (west portion of site), and a paved parking lot. Please refer to

Exhibit 2 in Appendix A for a diagram of the site.

Historical Information

Based on the review of historical information, the site was undeveloped until around the early-1900s. By 1937, a residential property was apparent on the site and from 1948 to

1970, a barn was visible on the northeast corner followed by an access road. In 1975, the previously mentioned residential property and barn were no longer apparent. The site consisted of a commercial property followed by a paved parking lot and green spaces. The Johnson County AIMS website indicated that the site building was constructed in 1972. Carl’s Mobil Station was identified in the City Directory in 1975, located at 1800 East Santa Fe Street (onsite). The potential impact to the site from the former onsite fueling station, with the potential for releases of petroleum products and/or hazardous substances during a timeframe prior to stricter regulations requiring notification and/or registration of the use of tanks and/or hazardous substances, is considered a REC. The site remained generally unchanged until 1996, when construction of a road was apparent on the south and west portions of the site. Based on the City

Facilities | Environmental | Geotechnical | Materials ii

Directory, onsite fueling stations were identified onsite from 1979 to 1989 (Bailey’s Mobil and Texaco Service Station gas sta). The potential impact to the site from the former onsite fueling stations, are considered a REC and are further discussed in Section 4.1.

The road was visible by 2002, and the paved parking lot was updated in 2005. The site has remained generally unchanged since.

Surrounding properties consisted of undeveloped land from at least the late-1800s to the early-1900s. To the north, agricultural land was apparent from 1937 to 1943, with a storage shed being visible in 1948. By 1955, a farmstead was apparent followed by a barn, storage sheds, and an unimproved road. Buildings are developed and demolished between 1962 and 1975. By 1975, areas to the north consisted of grass and tree-covered land. From 1981 to 1991, a commercial property was apparent followed by a paved parking lot. The commercial property is no longer apparent in 1996. The commercial property to the north consisted of restaurants, based on the City Directory.

By 2002, areas to the north consist of a vacant grass-covered lot. The area has remained relatively unchanged since.

To the east, a farmstead is apparent from 1937 to 1970 with several associated features including barns, storage sheds, unimproved roads, a small home orchard, and silos. The structures associated with the farmstead are no longer apparent by 1975, and the site consists of grass and tree-covered land. Since 1981, commercial properties and paved parking lots have been apparent to the east and northeast.

To the south, a road was mapped running in an east to west orientation in 1887, and a structure was mapped by 1935. From 1937 to 1962, a residential property and storage shed were apparent and in 1955, the road went under construction. In 1966, a commercial property occupied with four structures was apparent to the southwest followed by a paved parking lot. By 1970, the residential property was no longer apparent and instead a gas station was visible. Based on the City Directory and EDR

Regulatory Report, this facility appears to be associated with Larry’s Skelly, located at

1801 East Santa Fe Street. Based on the distance across East Santa Fe Street

(approximately 145 feet from the site) and apparent cross to down-gradient position, this facility does not represent a REC and is further discussed in Section 4.1 of this report. In 1975, a commercial property was apparent to the southeast (generally occupied by grocery stores and a hardware store, based on the City Directory) and southwest (general banking operations since 1989, based on the City Directory) and by

1981, the previously mentioned gas station was no longer visible and the area remained a paved parking lot. A new commercial property was also apparent to the southwest in

1981. In 1986 an additional commercial property was apparent. In 2002, the south adjoining road and parking lot to the southwest were updated and the area has remained generally unchanged since.

To the west, from 1937 to 1956, agricultural land was apparent followed by a residential property and access road. By 1959, a new road was apparent, and the previously mentioned residential property was no longer apparent. From 1981 to 1991, commercial

Facilities | Environmental | Geotechnical | Materials iii properties and paved parking lots were apparent. The commercial properties were no longer apparent by 1996, when the construction of on/off ramps for the highway were visible. The construction of the on/off ramps were completed by 2002, and the area to the west has remained relatively unchanged since.

Records Review

Selected federal and state environmental regulatory databases as well as responses from state and local regulatory agencies were reviewed. The site was identified in the

EDR Historic Auto facility, Recovered Government Archive (RGA) Leaking Underground

Storage Tank (LUST), Facility Index System/Facility Registry System (FINDS), AIRS, Kansas Environmental Information Management System (KEIMS), Underground Storage

Tank (UST), UST FINDER, UST FINDER RELEASE, and LUST regulatory databases as the

Baileys Mobil and Texaco facilities.

Baileys Mobil was listed as an EDR Historic Auto facility. EDR has searched selected national collections of business directories and has collected listings of potential gas station/filling station/service station sites that were available to EDR researchers.

Baileys Mobil operated as a “Gasoline Service Stations” facility from 1975 to 1986.

The KS RGA LUST regulatory database lists Texaco at 1800 E Santa Fe from 1996 to

2012. Texaco is listed within the UST FINDER, KS UST, KS AIRS, FINDS, and KS KEIMS databases for the five closed USTs:

◼ Two approximate 10,000-gallon gasoline fuel USTs, installed on January 1, 1986, removed on August 15, 1992.

◼ An approximate 10,000-gallon diesel fuel UST, installed on January 1, 1986, removed on August 15, 1992.

◼ An approximate 12,000-gallon gasoline fuel UST, installed on January 1, 1986, removed on August 15, 1992.

◼ An approximate 550-gallon used oil UST, installed on January 1, 1971, removed in 1987 (based on records provided by the KDHE).

Two separate gasoline releases were discovered on November 19, 1987 and January 24, 1992 resulting in two separate LUST incidences. The regulatory database comments for the first LUST listing discovered on November 19, 1987 included the following:

◼ “subsurface investigation indicates confirmed contam. abandoned tank farm & distribution system suspected cause. soil tph 68-1100ppm. Water samples benzene 56-600ppb. 03/92: gw recovery w/air stripping & soil vac is operating.

benzene 56-600 ppb. remedial pump and treat system in operation.”

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The regulatory database comments for the second LUST listing discovered on January

24, 1992 included the following:

◼ “4 gas usts removed. ~ 1168 yds3 contam material removed to forest view landfill. water from ust basin removed & properly treated or discharged. no remaining impact from ust systems documented. no apparent remaining impact of groundwater related to subject usts. groundwater remediation on site (from former ust system) is ongoing.”

Both LUST regulatory listings are noted with a “closed” status.

The KDHE KEIMS Online Database Mapper identified “Texaco 54 098 036”, located at

1800 E Santa Fe. Two evaluations were identified, in 1991 and 1994 for the “TANKS-

BER- Storage Tanks” program. The program type was listed as “BER-Tanks-Buried Tank

Leak Assessment (BTLA)”. Violations were not identified. Terracon requested tank closure reports for this facility, and the KDHE provided Terracon with a closure letter and other documents associated with the USTs. The following was stated in the closure letter, “Site remediation consisting of combined soil vapor extraction (SVES) and groundwater recovery/treatment has been ongoing since early 1992. Gasoline-range compound concentrations in groundwater have declined to below Kansas Action Levels (KALs) in all monitoring and recovery point”. However, without the latest groundwater monitoring well report, Terracon cannot confirm which hazardous substances and/or petroleum products were analyzed or whether detected contamination levels comply with current regulatory standards; therefore, the listings associated with these facilities are considered a REC to the site.

The remaining facilities listed in the database report do not appear to represent RECs to the site at this time based upon regulatory status, apparent topographic gradient, and/or distance from the site.

A review of the Kansas Geological Survey (KGS) Water Well Completion Records (WWC5) database did not reveal water or monitoring wells on the site. However, a “monitoring well/observation/piezometer” well was plotted to the northeast of the site approximately

330 feet from the site. The owner of this well is Texaco Refining and Marketing, Inc. and it has the status of “plugged”. The completion date is listed as November 11, 1996. It is possible that this well is associated with the former onsite Texaco Facility. The former onsite Texaco Facility is a REC and is discussed further above and in Section 4.1 of this report.

Site Reconnaissance

The following items were observed at the time of the site reconnaissance: an air compressor, an HVAC system, an outdoor AC unit, a water heater, an unlabeled five-

Facilities | Environmental | Geotechnical | Materials v gallon container, several small containers of general cleaning products, three sewer drains, a non-PCB labeled pole-mounted transformer, de minimis staining on pavement or similar surface, and a trash dumpster.

RECs were not observed at the site during the site reconnaissance.

Adjoining Properties

The site is bordered by the following:

Adjoining Properties

Direction Description

North An access road followed by a grass-covered lot.

East A paved parking lot utilized by a vacant building followed by a paved parking lot utilized by Aposento Alto Church.

South East Santa Fe Street followed by a paved parking lot utilized by Casa

Sol and former Westlake Ace Hardware.

West On/off ramps associated with Interstate 35 followed by green spaces.

RECs associated with the site originating from current off-site operations were not identified.

Significant Data Gaps

Significant data gaps (SDGs) were not identified.

Additional Services

Per the agreed scope of services specified in the proposal, the following additional service was conducted concurrently with the Phase I ESA: Asbestos Survey (prior to demolition). The results of the Asbestos Survey are discussed under separate cover.

Conclusions

We have performed a Phase I ESA consistent with the procedures included in ASTM

Practice E1527-21 at 1800 East Santa Fe Street, Olathe, Johnson County, Kansas, the site. The following REC was identified in connection with the site:

◼ Without the latest groundwater monitoring well report (for the former onsite fueling station facilities), Terracon cannot confirm which hazardous substances and/or petroleum products were analyzed or whether detected contamination levels comply with current regulatory standards; therefore, the listings associated

Facilities | Environmental | Geotechnical | Materials vi with these facilities (former onsite Carl’s Mobil Station, Baileys Mobil, and Texaco) are considered a REC to the site.

Recommendations

Based on the scope of services, limitations, and conclusions of this assessment, Terracon recommends the following additional actions:

◼ Additional Investigation: Terracon recommends conducting additional investigation to evaluate subsurface conditions associated with the identified

RECs.

◼ Additionally, if future use of the site includes redevelopment activities that will disturb soil at the site (such as demolition of building(s), construction of new buildings, building additions, excavations, road improvements, or replacement of parking surfaces), contractors should be made aware of potential environmental impacts to subsurface media associated with the onsite petroleum product and/or hazardous substances regulatory facilities. At such time, a multi-media management plan may be necessitated for proper and safe handling of subsurface media, along with contact/coordination with the KDHE.

◼ Terracon recommends that the blowdown (moisture) collected from the onsite 60-gallon air compressor be disposed of in accordance with local regulations (please refer to Section 5.4 for additional information). Terracon can assist the client and/or site tenant operator with regulatory compliance if desired.

Facilities | Environmental | Geotechnical | Materials 1

1.0 Introduction

1.1 Site Description

Site Name Erv’s Vacuum

Site Location/Address 1800 East Santa Fe Street, Olathe, Johnson County, Kansas

Parcel Number KS Uniform Parcel #0460893004006001000 and Tax

Property ID #DP57900001 0001

Land Area Approximately 0.51 acres

Site Improvements Commercial building (vacuum sales and repair), a storage shed, green spaces, and a paved parking lot

Anticipated Future Site

Use Redevelopment for mixed use

Reason for the ESA Redevelopment of the site

The location of the site is depicted on Exhibit 1 of Appendix A, which was reproduced from a portion of the United States Geological Survey (USGS) 7.5-minute series topographic map. The site and adjoining properties are depicted on the Site Diagram, which is included as Exhibit 2 of Appendix A.

1.2 Scope of Services

This Phase I Environmental Site Assessment (ESA) was performed in accordance with

HNTB Corporation subconsultant agreement dated August 7, 2024 and was conducted consistent with the procedures included in ASTM E1527-21, Standard Practice for

Environmental Site Assessments: Phase I Environmental Site Assessment Process. The purpose of this ESA was to assist the client in developing information to identify RECs in connection with the site as reflected by the scope of this report. Recognized environmental conditions are defined by ASTM E1527-21 as “(1) the presence of hazardous substances or petroleum products in, on, or at the subject property due to a release to the environment; (2) the likely presence of hazardous substances or petroleum products in, on, or at the subject property due to a release or likely release to the environment; or (3) the presence of hazardous substances or petroleum products in, on, or at the subject property under conditions that pose a material threat of a future release to the environment.” This ESA includes consideration of the movement of hazardous substances and petroleum products in any form, including migration of vapor in the subsurface. A de minimis condition is not a recognized environmental condition.

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This purpose was undertaken through user-provided information, a regulatory database review, historical and physical records review, interviews (including local government inquiries, as applicable), and a visual noninvasive reconnaissance of the site and adjoining properties. Limitations, ASTM deviations, and significant data gaps (if identified) are noted in the applicable sections of the report.

Review of Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS)

PFAS are a family of compounds which are considered emerging contaminants of concern due to their mobility and longevity in the environment. PFAS has been used in many products, including but not limited to fire-fighting foam, anti-stick coatings, stain and water-repellent coatings, electroplating, and paper products, among others. On July 8, 2024, US EPA designated two PFAS compounds, perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), including their salts and structural isomers, as hazardous substances under CERCLA; accordingly, PFOA and PFOS was evaluated within the scope of E1527-21. Please note that PFAS compounds are ubiquitous in the environment and this limited review is not to be construed as confirmation that PFAS compounds are not present in, at or under the site.

1.3 Standard of Care

This ESA was performed in accordance with generally accepted practices of this profession, undertaken in similar studies at the same time and in the same geographical area. We have endeavored to meet this standard of care, but may be limited by conditions encountered during performance, a client-driven scope of work, or inability to review information not received by the report date. Where appropriate, these limitations are discussed in the text of the report, and an evaluation of their significance with respect to our findings has been conducted.

Phase I ESAs, such as the one performed at this site, are of limited scope, are noninvasive, and cannot eliminate the potential that hazardous, toxic, or petroleum substances are present or have been released at the site beyond what is identified by the limited scope of this ESA. In conducting the limited scope of services described herein, certain sources of information and public records were not reviewed. It should be recognized that environmental concerns may be documented in public records that were not reviewed. No ESA can wholly eliminate uncertainty regarding the potential for RECs in connection with a property. Performance of this practice is intended to reduce, but not eliminate, uncertainty regarding the potential for RECs. No warranties, express or implied, are intended or made. The limitations herein must be considered when the user of this report formulates opinions as to risks associated with the site or otherwise uses the report for any other purpose. These risks may be further evaluated – but not eliminated – through additional research or assessment. We will, upon request, advise you of additional research or assessment options that may be available and associated costs.

Facilities | Environmental | Geotechnical | Materials 3

1.4 Additional Scope Limitations, ASTM Deviations, and Data Gaps

Based upon the agreed-on scope of services, this ESA did not include subsurface or other invasive assessments, vapor intrusion assessments or indoor air quality assessments (i.e., evaluation of the presence of vapors within a building structure), business environmental risk evaluations, or other services not particularly identified and discussed herein. Credentials of the company (Statement of Qualifications) have not been included in this report but are available upon request. Pertinent documents are referred to in the text of this report, and a separate reference section has not been included. Reasonable attempts were made to obtain information within the scope and time constraints set forth by the client; however, in some instances, the information requested is not, or was not, received by the issuance date of the report. Information obtained for this ESA was received from several sources that we believe to be reliable;

nonetheless, the authenticity or reliability of these sources cannot and is not warranted hereunder. This ESA was further limited by the following:

◼ The client did not provide the requested User’s information as of the issuance date of the report, which represents a data gap. Terracon assumes the client is evaluating the questionnaire information outside the context of Terracon’s Phase I

ESA scope of work and report. Based on the information utilized in the preparation of this report (historical, regulatory, and site reconnaissance), this limitation is not anticipated to alter the conclusions of this report or prevent the

Environmental Professional (EP’s) ability to identify RECs, and is therefore not significant.

◼ At the issuance of this report, a follow-up response has not been received from the KDHE concerning Terracon’s request for additional documentation associated with the site’s regulatory listings (Section 4.1). However, based on the information reviewed in Section 4.1 of this report, this limitation is not anticipated to alter the conclusions of this report, or prevent the EP’s ability to identify RECs, and therefore is not significant.

An evaluation of the significance of limitations and missing information with respect to our findings has been conducted, and where appropriate, significant data gaps are identified and discussed in the text of the report. However, it should be recognized that an evaluation of significant data gaps is based on the information available at the time of report issuance, and an evaluation of information received after the report issuance date may result in an alteration of our conclusions, recommendations, or opinions. We have no obligation to provide information obtained or discovered by us after the issuance date of the report, or to perform any additional services, regardless of whether the information would affect any conclusions, recommendations, or opinions in the report. This disclaimer specifically applies to any information that has not been provided by the client.

Facilities | Environmental | Geotechnical | Materials 4

This report represents our service to you as of the report date and constitutes our final document; its text may not be altered after final issuance. Findings in this report are based upon the site’s current utilization, information derived from the most recent reconnaissance and from other activities described herein; such information is subject to change. Certain indicators of the presence of hazardous substances, petroleum products or PFAS compounds may have been latent, inaccessible, unobservable, or not present during the most recent reconnaissance and may subsequently become observable (such as after site renovation or development). Further, these services are not to be construed as legal interpretation or advice.

1.5 Reliance

This ESA report is prepared for the exclusive use and reliance of HNTB Corporation. Use or reliance by any other party is prohibited without the written authorization of HNTB

Corporation and Terracon Consultants, Inc. (Terracon).

Reliance on the ESA by the client and all authorized parties will be subject to the terms, conditions and limitations stated in the proposal, ESA report, and Terracon’s Master

Services Agreement. The limitation of liability defined in the Master Services Agreement is the aggregate limit of Terracon’s liability to the client and all relying parties.

Continued viability of this report is subject to ASTM E1527-21 Section 4.6. If the ESA will be used by a different user (third party) than the user for whom the ESA was originally prepared, the third party must also satisfy the user’s responsibilities in Section

6 of ASTM E1527-21.

1.6 Client Provided Information

Prior to the site visit, Zach Jarchow, client’s representative, was asked to provide the following user questionnaire information as described in ASTM E1527-21 Section 6.

Client Questionnaire Responses

Client Questionnaire Item

Client

Did Not

Respond

Client’s

Response

N/A* Yes No

Actual Knowledge of Environmental Liens that may encumber the site.

X

Actual Knowledge of Activity Use Limitations (AULs) that may encumber the site.

X

Specialized Knowledge or Experience that is material to a REC in connection with the site.

X

Facilities | Environmental | Geotechnical | Materials 5

Client Questionnaire Item

Client

Did Not

Respond

Client’s

Response

N/A* Yes No

Actual Knowledge of a Lower Purchase Price because contamination is known or believed to be present at the site.

X

Commonly Known or Reasonably Ascertainable

Information that is material to a REC in connection with the site.

X

Obvious Indicators of Releases at the site. X

*N/A = Not Applicable

The client did not provide the requested User’s information as of the issuance date of the report, which represents a data gap. Terracon assumes the client is evaluating the questionnaire information outside the context of Terracon’s Phase I ESA scope of work and report.

2.0 Physical Setting

Physical Setting Information Source

Topography

Site Elevation Approximately 1,050 feet above sea level.

USGS Topographic Map, State of Kansas

Quadrangles, Olathe, 2022 and Ocheltree, 2022

(Appendix A)

Topographic Gradient Generally sloping towards the east.

Closest Surface Water

Indian Creek, approximately

1,900 feet northeast of the site.

Soil Characteristics

Soil Type Grundy silt loam, 1 to 3 percent slopes

Johnson County, KS USDA-

NRCS Web Soil Survey viewed June 24, 2025 Description

The Grundy silt loam is found on 1 to 3 percent slopes. In a typical profile, the surface layer is black silt loam and silty clay loam. The subsoil is composed of various shades of dark gray-

Facilities | Environmental | Geotechnical | Materials 6

Physical Setting Information Source brown, firm and very firm silty clay loam. These soils generally have slow permeability. Surface runoff is generally slow. The shrink-swell potential is generally high in the subsoil.

Geology/Hydrogeology

Formation Douglas Group

State Surficial Geological

Interactive Map, Kansas

Geological Survey, Map M-

Description

The Stranger and the overlying

Lawrence formations make up the Douglas Group. The

Douglas Group is composed mainly of clastic rocks. It ranges in thickness from 240 ft

(73 m) in northern outcrops to

400 ft (122 m) in southern outcrops.

Estimated Depth to

First Occurrence of

Groundwater

Approximately 15 feet below ground surface.

Kansas Geological Survey

Water Wells Database

*Hydrogeologic

Gradient

Not known - may be inferred to be parallel to topographic gradient (primarily to the east).

*The groundwater flow direction and the depth to shallow, unconfined groundwater, if present, would likely vary depending upon seasonal variations in rainfall and other hydrogeological features. Without the benefit of on-site groundwater monitoring wells surveyed to a datum, groundwater depth and flow direction beneath the site cannot be directly ascertained.

3.0 Historical Use Information

Terracon reviewed the following historical sources to develop a history of the previous uses of the site and surrounding area. Copies of selected historical documents are included in Appendix C.

3.1 Historical Topographic Maps, Aerial Photographs, and Sanborn

Maps

Readily available historical USGS topographic maps, selected historical aerial photographs (at approximately 10-to-15-year intervals), and historical fire insurance maps produced by the Sanborn Map Company were reviewed to evaluate land

Facilities | Environmental | Geotechnical | Materials 7 development and obtain information concerning the history of development on and near the site. Reviewed historical topographic maps, aerial photographs, and Sanborn maps are summarized below.

Historical fire insurance maps produced by the Sanborn Map Company were requested from Environmental Data Resources, LLC (EDR) to evaluate past uses and relevant characteristics of the site and surrounding properties. Based upon inquiries to the above-listed Sanborn provider, Sanborn maps were not available for the site. A copy of the EDR “no-coverage” letter is included Appendix C.

◼ Topographic maps:

o Olathe, Kansas, dated 2022, 2018, 2015, 2012, 1995, 1975, 1970, 1956, and 1935 (1:24,000) o Olathe, Kansas, dated 1943 (1:31,680) o Olathe, Kansas, dated 1893 and 1887 (1:125,000)

◼ Aerial photographs: USDA/NAIP, 2023, 2019, 2015, 2012, 2008, and 2002 (1” =

500’); USGS/DOQQ, 2002 and 1991 (1” = 500’); USGS, 1996, 1981, 1970, 1962, 1959, 1955, and 1955 (1” = 500’); NHAP, 1986 (1” = 500’); USDA, 1975, 1966, 1941 and 1937 (1” = 500’)

Historical Maps and Aerial Photographs

Direction Description

Site

1887 - 1893: Apparent undeveloped land.

1935: A structure is mapped.

1937 - 1943: Residential property is apparent on the western portion of the site followed by an access road and scattered trees.

1948 - 1970: A barn is apparent on the northeast corner of the site followed by an access road.

1975 - 1995: The residential property and barn are no longer apparent.

A commercial property is apparent on the northeast corner of the site followed by a paved parking lot and green spaces.

1996: The green spaces are no longer apparent. Construction of a road is apparent on the south and west portions of the site followed by grading activity.

2002: A curving road is apparent on the west portion of the site.

2005 - 2023: The paved parking lot was updated.

North 1887 - 1935: Apparent undeveloped land.

1937 - 1943: Agricultural land is apparent followed by scattered trees.

Facilities | Environmental | Geotechnical | Materials 8

Direction Description

1948: A storage shed is apparent.

1955: A farmstead with a barn and storage sheds is apparent followed by unimproved roads.

1959: Grading activity is apparent.

1962: A new structure associated with the farmstead is apparent.

1970: Some of the structures associated with the farmstead are no longer apparent and grading activity is visible.

1975: The remaining structures associated with the farmstead are no longer apparent. Grass and tree-covered land is apparent.

1981 - 1995: An access road is apparent running in an east to west orientation followed by commercial properties and paved parking lots.

1996: The north adjoining commercial property is no longer apparent.

Grading activity is apparent.

2002 - 2023: Grading activity is no longer visible and instead a grass-covered lot is apparent followed by a road.

East

1887 - 1935: Apparent undeveloped land followed by a stream running in a north to south orientation.

1937 - 1943: Apparent agricultural land followed by a farmstead. Three barns are associated with the farmstead. A storage shed and unimproved road are also apparent to the northeast.

1948: Two possible silos are apparent near the farmstead followed by an access road and small home orchard. The unimproved road near the storage shed is no longer apparent.

1955: The small home orchard and storage shed to the northeast are no longer apparent. A small storage shed is apparent followed by plowing activity.

1959: Unimproved roads are apparent near the barns followed by farming activity.

1962 - 1970: The unimproved roads and one of the silos are no longer apparent.

1975: The structures associated with the farmstead are no longer apparent, as well as the access road. Grass and tree-covered land is apparent.

1981-1991: Commercial properties and paved parking lots are apparent to the east and northeast.

1995-2023: The stream is no longer mapped.

South 1887 - 1893: Undeveloped land is apparent followed by a road running in an east to west orientation.

Facilities | Environmental | Geotechnical | Materials 9

1935: A structure is mapped.

1937 - 1943: A residential property and storage shed are apparent followed by agricultural land and scattered trees.

1948: An access road is apparent near the residential property.

1955-1956: Grading activity is apparent on the road, and it appears to be under construction. Grading activity is also apparent near the residential property and to the southwest. An unimproved road is apparent near the residential property.

1959 - 1962: The south adjoining road was updated. The unimproved road near the residential property is no longer apparent.

1966: A commercial property with four structures is apparent to the southwest followed by a paved parking lot.

1970: The residential property and storage shed are no longer apparent.

A gas station* is apparent followed by a paved parking lot and two canopies. Grading activity is also apparent. The paved parking lot to the southwest was updated.

1975: A commercial property under construction is apparent to the southeast followed by grading activity. The previously mentioned commercial property to the southwest is no longer apparent. A new commercial property and paved parking lot is apparent to the southwest.

1981: The previously mentioned gas station is no longer apparent. A paved parking lot utilized by the previously mentioned commercial property is apparent. A new commercial property is apparent to the southwest and the previously mentioned commercial property is no longer apparent.

1986-1995: A new commercial property is apparent.

1996: Grading activity is apparent on the south adjoining road.

2002-2023: The south adjoining road was updated. The parking lot to the southwest was updated.

West

1887 - 1935: Apparent undeveloped land.

1937 - 1956: Apparent agricultural land followed by a residential property, an access road, and scattered trees.

1959 - 1975: A new road running in a north to south orientation is apparent. The previously mentioned residential property and access road are no longer apparent. Grass-covered land is apparent.

1981 - 1995: A paved parking lot and commercial properties are apparent.

Facilities | Environmental | Geotechnical | Materials 10

1996: The previously mentioned parking lot and commercial properties are no longer apparent. Grading activity is apparent followed by the construction of on/off ramps for the highway.

2002-2023: The construction of the on/off ramps is complete, and grading activity is no longer apparent.

*On the 1970 aerial photograph, a gas station with two canopies is apparent on the south adjoining property, across East Santa Fe Street. Based on the City Directory and

EDR Radius Map Report, this facility appears to be associated with Larry’s Skelly, located at 1801 East Santa Fe Street. Based on the distance across East Santa Fe Street

(approximately 145 feet from the site) and apparent cross to down-gradient position, this facility does not represent a REC and is further discussed in Section 4.1 of this report.

3.2 Historical City Directories

The EDR Digital Archive, Polk’s City Directory, and Cole Information city directories used in this study were made available through EDR (selected years reviewed: 1964-2020) and were reviewed at approximate five-year intervals, if readily available. The current street address for the site was identified as 1800 East Santa Fe Street.

Historical City Directories

Direction Description

Site

1800 East Santa Fe Street: Carl’s Mobil Station* (1975); Bailey’s Mobil**

(1979-1984); Texaco Service Station gas sta** (1989); Santa Fe Garden

Ctr (1995); Ervs Vacuum Sales & Service (2000); Ervs Vacuum Sales &

Service, Beam Central Cleaning Systems, Erbs Home Center (2005); Ervs

Vacuum Sales & Svc (2010); Ervs Home Center (2014-2017); Ervs Home

Center, listed individual (2020)

North

224 North Rogers Road: Dairy Queen (1979-1984); Crown House

Restaurant (1989); Crown House Inc (1992)

222 North Rogers Road: State Hwy Comn Resident Eng (1968-1971)

East

1804 East Santa Fe Street: Jack in the Box fast food restr (1979); Vacant

(1984-1989); Wilies Grill (1992); Authorized Cellular, Authorized Cellular

Corporate Office (2000); Cingular Wireless (2005); Avis Rent a Car

(2010-2020)

220 North Rogers Road: State Hwy Comn Mtce Dept (1968-1971); Pla-

Mar Skate on Roller Rink (1979-1984); Kansas City Fellowship (Olathe

Worship Cntr) (1989); MVF Olathe Worship (1992); Cornerstone

Community Church, Ed Tech Academy (1995); Commercial Management

Services, Ed Technology Academy, Lil Technology Christian Daycare, Facilities | Environmental | Geotechnical | Materials 11

Pioneer Christian Academy (2000); Commercial Management Services

(2005); Centro Cristiano Vision (2010); Conquers Christian Center, Conquistadores Centro Cristiano (2014-2017)

South

130 North Clairborne Road: Revco Discount Drug Center (1979); Gold

Valley (2010)

120 North Clairborne Road: Milgram Food Stores, Millgram’s Deli (1979);

Save Mart Warehouse Foods (1984); Rug Doctor Rents (1992); Westlake

Hardware (1995-2005); Westlake Ace Hardware (2010-2017); Blue

Rhino, Westlake Ace Hardware, Church’s Chicken (2020)

1801 East Santa Fe St: Larry’s Skelly**** (1971); Vacant (1975)

1802 East Santa Fe St: Under Constn (1971)

175 N Clairborne Road: Bank Four (Auto Teller) (1989); Bank IV Kansas

City (1992-1995); Bank of America (2014-2020)

West 207 North Rogers Road: Firestone Stores ret tire & serv*** (1984-1992)

211 North Rogers Road: Taco John’s (1979-1995)

*Carl’s Mobil Station was identified in the City Directory in 1975, located at 1800 East

Santa Fe Street (onsite). Former onsite filling stations are further discussed in Section

4.1 of this report.

**Bailey’s Mobil and Texaco Service Station gas sta were identified in the City Directory from 1979 to 1989, located at 1800 East Santa Fe Street (onsite). These facilities are further discussed in Section 4.1 of this report.

***Firestone Stores ret tire and service was identified in the City Directory from 1984 to

1992, located at 207 North Rogers Road. This facility does not represent a REC at this time and is further discussed in Section 4.1 of this report.

****Larry’s Skelly was identified in the City Directory in 1971, located at 1801 East

Santa Fe Street. Based on the distance across East Santa Fe Street (approximately 145 feet from the site) and apparent cross to down-gradient position, this facility does not represent a REC and is further discussed in Section 4.1 of this report.

3.3 Site Ownership

Based on a review of information obtained from the Johnson County, Kansas AIMS GIS website, the current site owner is City of Olathe. The Johnson County AIMS website also indicated that the site building was constructed in 1972.

Facilities | Environmental | Geotechnical | Materials 12

3.4 Title Search

At the direction of the client, a title search was not included as part of the scope of services. Unless notified otherwise, we assume that the client is evaluating this information outside the scope of this report.

3.5 Environmental Liens and Activity and Use Limitations

The EDR regulatory database report included a review of both Federal and State

Engineering Control (EC) and Institutional Control (IC) databases. Based on a review of the database report, the site was not listed on the EC or IC databases. Please note that in addition to these federal and state listings, AULs can be recorded at the county and municipal level that may not be listed in the regulatory database report. Environmental lien and activity and use limitation records recorded against the site were not provided by the client. At the direction of the client, performance of a review of these records was not included as part of the scope of services and unless notified otherwise, we assume that the client is evaluating this information outside the scope of this report.

3.6 Interviews Regarding Current and Historical Site Uses

The following individuals were interviewed regarding the current and historical use of the site.

Interviews

Interviewer Name / Email / Phone Title Date

Nidia Lazos

Leslie Donnelly /

LEDonnelly@OLATHEKS.ORG

/ (913) 971-9245

Sr. Project

Manager (site owner representative)

July 7, 2025

Nidia Lazos Sarah Degomdea / (816)

820-2800

Former site owner

July 9, 2025 and

September 4, 2025

Terracon provided Ms. Donnelly a copy of Terracon’s Site Assessment Interview Form for identifying information associated with the site. Ms. Donnelly indicated that she has been familiar with the site for less than a year. According to Ms. Donnelly, the past use of the property was the operation of Erv’s Vacuums, and the property is currently being vacated. Ms. Donnelly also noted the following:

◼ The source of drinking water and sewage disposal are municipal (City of Olathe).

◼ Ms. Donnelly is not aware of any stains on pavement or soil that would indicate a spill or release of hazardous materials or petroleum products.

Facilities | Environmental | Geotechnical | Materials 13

◼ Ms. Donnelly is not aware of any obvious indicators that point to the presence or likely presence of contamination at the site.

◼ Ms. Donnelly has no actual knowledge of current or past hazardous substance and petroleum product use, treatment, storage, disposal, and generation, spills, or releases on the site.

◼ Ms. Donnelly has no actual knowledge of ponds, storage tanks, presence of PCBs, waste disposal or dumps, or wells on the site now or in the past.

Terracon interviewed Sarah Degomdea, during the site reconnaissance. Ms. Degomdea indicated that she has been familiar with the site for about five and a half years. Ms.

Degomdea noted the following:

◼ Ms. Degomdea indicated that the storage shed on the property was added to the site in 2021, and the size is 200 square feet. The storage shed is used to store equipment.

◼ Ms. Degomdea is not aware of when the main building was constructed, but she did indicate that the size is approximately 1,948 square feet.

◼ The electric provider is Evergy, the natural gas provider is Spire, and the water provider is the City of Olathe.

◼ Ms. Degomdea indicated that the site has operated as a vacuum store for approximately 30 years, and before that it operated as a gas station. The former onsite gas station facilities are further discussed in Section 4.1 of this report.

3.7 Prior Report Review

Terracon requested the client provide any previous environmental reports they are aware of for the site. Previous reports were not provided by the client to Terracon for review.

4.0 Records Review

Regulatory database information was provided by EDR, a contract information services company in a report dated June 20, 2025. The purpose of the records review was to identify RECs in connection with the site. Information in this section is subject to the accuracy of the data provided by the information services company and the date at which the information is updated. The scope herein did not include confirmation of facilities listed as "unmappable" by regulatory databases.

In some of the following subsections, the words up-gradient, cross-gradient, and down-gradient refer to the topographic gradient in relation to the site. As stated previously, Facilities | Environmental | Geotechnical | Materials 14 the groundwater flow direction and the depth to shallow groundwater, if present, would likely vary depending upon seasonal variations in rainfall and the depth to the soil/bedrock interface. Without the benefit of on-site groundwater monitoring wells surveyed to a datum, groundwater depth and flow direction beneath the site cannot be directly ascertained.

4.1 Federal and State/Tribal Databases

Terracon reviewed standard federal, state, and tribal environmental record sources within the approximate minimum search distances as required by ASTM E1527-21 and presented in Table 2 of Section 8.0 of The Standard (Types of Government Records to be

Reviewed). Further, to enhance and supplement the standard environmental record sources, Terracon reviewed additional federal, state, tribal, local, and proprietary environmental record sources, provided by the database firm, if potentially useful and reasonably ascertainable. Please refer to Appendix D (the environmental regulatory database report) for the number of listings within each database reviewed and database definitions and descriptions.

Due to conversion of address data to location coordinates and the accuracy of government records, the facility locations depicted in the environmental regulatory database report may not match actual physical locations. As such, Terracon attempted to field-verify the actual distances of facilities of concern from the site.

The following table summarizes the site-specific information provided by the database and/or gathered by this office for identified facilities. Facilities are listed in order of proximity to the site, within approximately 600 feet of the site. Additional discussion for selected facilities follows the summary table.

Listed Facilities

Facility Name and

Location

Estimated Distance /

Direction / Gradient

Database

Listings

Findings

Summary

Baileys Mobil

1800 E Santa Fe

Onsite EDR Hist Auto REC, discussed below.

Texaco

1800 E Santa Fe

Onsite FINDS, AIRS, KEIMS, UST, RGA LUST, UST

FINDER, UST

FINDER

RELEASE,

LUST

REC, discussed below.

Arco

1804 E Santa Fe St

East adjoining property /

Down-gradient

EDR Hist Auto Not a REC, discussed below.

Facilities | Environmental | Geotechnical | Materials 15

Facility Name and

Location

Estimated Distance /

Direction / Gradient

Database

Listings

Findings

Summary

Larrys Skelly

1801 E Santa Fe

South adjoining property

Approximately 145 Feet

SSW / Cross to down-gradient

EDR Hist Auto Not a REC, discussed below.

One Hour Photo

130 N Clairborne

South adjoining property

Approximately 220 feet

S / Cross-gradient

RCRA NonGen

/ NLR, ECHO,

FINDS

Not a REC, discussed below.

Firestone

207 N Rogers Rd

West adjoining property

Approximately 145 feet

W / Up-gradient

AIRS, LUST,

KEIMS, UST

FINDER, UST

FINDER

RELEASE, UST,

RCRA-VSQG,

ECHO, FINDS

Not a REC, discussed below.

Cummins Ind Tools

1900 E Santa Fe Dr

Approximately 355 feet

ENE / Down-gradient

RCRA NonGen

/ NLR, ECHO,

FINDS

Not a REC, based on distance and gradient.

Johnson Co Auto Rpr

300 N Rogers Rd

Approximately 415 feet

N / Up-gradient

RCRA-VSQG Not a REC, based on distance.

Olathe Imports Inc

300 N Rogers Rd

Approximately 415 feet

N / Up-gradient

RCRA-VSQG,

ECHO, FINDS

Not a REC, based on distance.

Aih Waste

Management, Inc.

300 N. Winchester

Approximately 490 feet

NE / Cross to down-gradient

SWF/LF Not a REC, based on distance and gradient.

Computerwise Inc

302 N Winchester

Approximately 485 feet

NE / Cross to down-gradient

RCRA NonGen

/ NLR, ECHO,

FINDS

Not a REC, based on distance and gradient.

Olathe Lincoln Mercury

1825 E Santa Fe

Approximatel…