Exhibit - MLK_Phase_II_ESA_REV1_20250401 (4).pdf

PHASE II ENVIRONMENTAL SITE ASSESSMENT

GSD PARK DEVELOPMENT AND EXPANSION – MLK

PARCELS

DETROIT, WAYNE COUNTY, MICHIGAN

Revision 1 April 1, 2025

Prepared for:

U.S. Environmental Protection Agency (EPA) Region 5

77 West Jackson Boulevard, Chicago, Illinois 60604

Submitted by:

Tetra Tech, Inc.

Superfund Technical Assessment and Response Team 1 South Wacker Drive, Suite 3700

Chicago, IL 60606

EPA Contract Number: 68HE0519D0005 Task Order – Task Order Line-Item Number (TO-TOLIN): F0107-0001EC260

Document Tracking Number: 3249a

ACRES ID: 260210

This project is funded by the Region 5 Targeted Brownfields Assessment Program.

Phase II Environmental Site Assessment – Revision 1 GSD Park Development and Expansion – MLK Parcels

TO-TOLIN: F0107-0001EC260

Page i

C O N T E N T S

1. Introduction

1.1. Site Description

1.2. Previous Investigations

1.3. Phase II ESA Tasks

2. Investigative Methodology

2.1. ISM Soil Borings and Soil Sampling

2.2. Discrete Soil Borings and Soil Sampling

2.3. Sample Handling, Tracking, and Custody

2.3.1. Sample Labeling

2.3.2. Sample Packaging and Shipping Procedures

2.3.3. Quality Assurance and Quality Control Procedures

2.4. Field Measurements and Recordkeeping

2.5. Decontamination Procedures

2.6. Waste Characterization and Management

2.7. Analytical Methodology

3. Environmental Setting

3.1. Regional Physiography

3.2. Regional Geology and Hydrogeology

3.3. Site Geology and Hydrogeology

4. Results

4.1. ISM Soil

4.2. Discrete Soil

4.3. Quality Assurance/Quality Control

5. Summary and Recommendations

5.1. ISM Soil

5.2. Discrete Soil

5.3. Recommendations

6. References

Page ii

T A B L E S

Table 1 — Phase II ESA Personnel Table 2 — MLK Parcel Details

Table 3 — ISM Soil Samples with Chemicals of Concern (COCs) Exceeding Screening

Levels

Table 4 — Discrete Soil Samples with COCs Exceeding Screening Levels

A P P E N D I C E S

Appendix A. Figures

Figure 1 — Site Location Map Figure 2 — Site Layout, Decision Units, Discrete Soil Sample Locations, and RECs

Figure 3A —ISM Decision Units and Discrete Sample Locations – DU1 Figure 3B —ISM Decision Units and Discrete Sample Locations – DU2 and DU3 Figure 3C —ISM Decision Units and Discrete Sample Locations – DU4 and DU5

Figure 3D —ISM Decision Units and Discrete Sample Locations – DU6 and DU7 Figure 3E —ISM Decision Units and Discrete Sample Locations – DU8 Figure 3F —ISM Decision Units and Discrete Sample Locations – DU9 and DU10

Figure 3G —ISM Decision Units and Discrete Sample Locations – DU11, DU12, and DU13 Figure 4 —Soil Samples Exceeding Residential Direct Contact Criteria

Appendix B. Field Notes Appendix C. Photographic Documentation Log

Appendix D. Soil Boring Logs Appendix E. Data Verification Checklist

Appendix F. Sample Analytical Summary Tables Table F-1 — Decision Unit and Increment Summary

Table F-2 — VOCs in Soil

Table F-3 — PAHs in Soil Table F-4 — PCBs in Soil

Table F-5 — Metals and Mercury in Soil

A T T A C H M E N T S

Attachment 1. Laboratory Analytical Report

1 . I N T R O D U C T I O N

Under Contract 68HE0519D0005, Task Order – Task Order Line-Item Number (TO-TOLIN)

F0107-0001EC260, U.S. Environmental Protection Agency (EPA) Region 5 tasked the Tetra

Tech, Inc. (Tetra Tech) Superfund Technical Assessment and Response Team (START) to conduct a Phase II Environmental Site Assessment (ESA) at the General Services Division (GSD)

Park Development and Expansion – MLK Parcels in Detroit, Wayne County, Michigan (termed the site or subject property). The Phase II activities included preparation of planning documents, data collection, reporting, and quality assurance (QA) and quality control (QC) measures. Through the Targeted Brownfields Assessment (TBA) Program, EPA ordered this work in response to a request from the City of Detroit (the City). The City intends to redevelop the site for future use as an active recreational park. This report documents Tasks 3, 4, and 5 of the TO-TOLIN. Figure 1 in Appendix A is a site location map.

The objective of the Phase II ESA was to document the presence or absence of soil contamination. START conducted the Phase II ESA in accordance with the following documents:

• ASTM International (ASTM) Standard E1903-19, Standard Practice for Environmental Site Assessments: Phase II Environmental Site Assessment Process (ASTM 2019)

• The sampling and analysis plan (SAP) for the site (Tetra Tech 2025)

• The TBA quality assurance project plan (QAPP) (Tetra Tech 2019)

• The site-specific QAPP addendum, Revision 0 (Tetra Tech 2024a)

• The site-specific health and safety plan (HASP)

• Michigan Department of Environment, Great Lakes, and Energy (EGLE) Guidance Document for the Vapor Intrusion Pathway (EGLE 2013)

• EGLE Guidance Document for Incremental Sampling Methodology and Applications

(EGLE 2018)

• EGLE Part 201 Generic Cleanup Criteria and Screening Levels for Residential Soil (EGLE 2023)

The personnel listed in Table 1 completed the Phase II ESA.

Table 1 — Phase II ESA Personnel

Name Organization Title

Carol Nissen Tetra Tech, Inc. Targeted Brownfields Assessment Program and Project Manager

Todd Grossmann Tetra Tech, Inc. Environmental Scientist and Field Team Leader

Kris Schnoes Tetra Tech, Inc. Quality Control Reviewer

Leslie Howell Eurofins Environment Testing North Central Cleveland, Ohio Laboratory Project Manager

Charles Morrow Eurofins Environment Testing in Seattle, Washington Laboratory Project Manager

Chris Lewis, Jacob Wilson

Fibertec Environmental Services Drill operators

Fibertec Environmental Services conducted the direct-push drilling at the site. Eurofins

Environment Testing of Cleveland, Ohio, provided analytical services for soil samples. Eurofins

Environment Testing of Seattle, Washington, provided analytical services for incremental sampling methodology (ISM) soil samples for metals analyses.

This report summarizes the Phase II ESA activities. In addition to this introduction, it contains the following:

• The ESA investigative methodology (Section 2)

• The site environmental setting (Section 3)

• Results of the Phase II ESA (Section 4)

• ESA conclusions (Section 5)

• A list of references cited herein (Section 6)

For reference, this report includes additional information contained in appendices and attachments:

• Relevant site figures (Appendix A)

• Field sampling sheets and field notes (Appendix B)

• A photographic documentation log (Appendix C)

• Soil boring logs (Appendix D)

• Data verification checklist (Appendix E)

• Summary tables of parcel information and sample analytical results (Appendix F)

• Laboratory analytical reports (Attachment 1)

1.1. SITE DESCRIPTION

The GSD Park Development and Expansion – MLK Parcels site consists of the property identification numbers (PIN) and addresses listed in Table 2 below.

Table 2 — MLK Parcel Details

Site Total Size PINs Addresses

MLK Parcels 2.01 acres

08001732, 8001677, 8001678, 8001679, 8007632, 8007633, 8007634, 8007635, 8007636, 8007637, 8007638, 8007639, 8007640, 8007641, 8007643, 8007644, 8007645, 8007646, 8007647, 8001680, 08001681-2, 8007462

1843 W Bethune Ave;

2585, 2589, 2593, and 2599 W Grant Blvd;

7334, 7342, 7350, 7356, 7368, 7376, 7384, 7402, 7408, 7416, 7422, 7430, 7436, 7444, 7450, and 7458 Rosa Parks Blvd

The MLK Parcels site was used for residential, commercial, and industrial purposes after it was first developed, prior to 1915. Based on historical documentation, residential and commercial buildings were on the subject property prior to 1915 until the late 1960s when demolition of buildings began. Historical site use included dry cleaning, auto repair, and machining. The site has remained vacant ever since.

The geographic coordinates at its approximate center are 42.3644 degrees north and 83.090993 degrees west. The site is generally flat with a topographic gradient to the south and has an elevation of 630 feet above mean sea level. It is in a mixed-use residential and commercial area and is bounded: (1) to the north by West Bethune Avenue and vacant land, with residential properties beyond; (2) to the east by an alleyway, with residential properties beyond; (3) to the south by West Grand Boulevard, with commercial properties beyond; and (4) to the west by Rosa

Parks Boulevard, with the Boulevard Temple Retirement Home and residential land beyond.

1.2. PREVIOUS INVESTIGATIONS

START performed a Phase I ESA for the site. As part of the Phase I ESA, START reviewed the vapor encroachment screen report, radius map report, historical aerial photos, historical topographic maps, historical city directories, and historical Sanborn maps.

The Phase I ESA identified the following recognized environmental condition (REC), based on database research and site reconnaissance (Tetra Tech 2024b).

• REC 1. The subject property at 7454 12th Street is listed in the Environmental Data Resources, Inc. (EDR) Historical Cleaner database for operating as Original Carnigie in 1931 and Summit Cleaners in 1956. Because of the potential use of solvents at the site, this is considered as a REC and vapor encroachment condition (VEC).

• REC 2. The subject property at 2593 West Grand Boulevard was occupied by Ingersoll Mlng Mch, based on the 1957 City Directory Report , which was likely an industrial property (“milling and machining”). Since petroleum and solvents were likely used at the property, the historical use is considered a REC.

• REC 3. The subject property at 1847 Bethune Avenue was listed as an electric and service company in the 1957 and 1962 City Directories. This property is shown as a machine shop and factory on the Sanborn map. Because of the potential use of petroleum and solvents, the historical use is considered a REC.

• REC 4. The property at 7602 Rosa Parks Boulevard is on the west side of Rose Parks Boulevard, across the street from the site. This property is shown as a filling station with gasoline tanks on the Sanborn maps. It was listed as E&G Service, which was likely also an auto repair facility. Because of the proximity to the site, upgradient location, storage of petroleum products, and likely use of solvents, the historical use is considered a REC.

• REC 5. The factory at 1834 Bethune Avenue, adjacent north of the site is considered a REC because of the proximity to the site, upgradient location, and the likely use of petroleum products and solvents.

• REC 6. The EDR Historical Cleaner database identified several sites adjacent to the site that potentially used solvents; therefore, they are considered RECs and VECs to the site:

o Ballentine Shop, 7333 12th Street o Ballentine Cleaners Inc., 2577 W Grand Boulevard o Ballentine Cleaners, 7335 12th Street o Aveson Richd, 7515 12th Street o Celeste Cleaners, 2588 W Grand Boulevard o Fronchl Glo Dry Cle, 2570 W Grand Boulevard o Kim David, 7616 12th Street o Hladik Anthony, 7628 12th Street o Kolb Jack, 7600 Churchill Avenue o Sullivan Cleaners, 7606 Churchill Avenue o S T C Amy S Cleaners, 7642 12th Street o Slelly Cleaners, 7642 12th Street

• REC 7. The EDR Historical Automobile database (EDR HIST AUTO) identified several sites adjacent to the site. Since petroleum and solvents were potentially used, these sites are considered as RECs and VECs to the site.

o Farris Standard Serv (Former Gas Station- also listed on the Baseline Environmental Assessment and Michigan Leaking Underground Storage Tank databases), 7541 12th Street o Sterrett and Son Sta, 7541 12th Street o Dicks Friendly Service, 2626 W Grand Boulevard o Lightning Auto Wash, 1832 W Bethune Avenue o Baskin Juli Las, 7602 12th Street

• REC 8. The presence of stained soil observed during the site reconnaissance on the northern portion of the subject property is considered a REC.

• REC 9. The pile of soil, debris, and concrete observed during the site reconnaissance on the southwestern portion of the subject property has an unknown origin and may contain petroleum or hazardous substances and is considered a REC.

• REC 10. Unknown fill materials may have been imported to the site and used to backfill basements during demolition activities. These unknown fill materials may contain petroleum or hazardous substances and are considered a REC.

In addition, one controlled recognized environmental condition (CREC) was identified for the site:

• CREC 1: The site identified as Lexington Village Apartments, at 7507 Rosa Parks Boulevard, is considered as a CREC because elevated benzene concentrations are present in soil above the indoor air criteria, and the risk is considered controlled for the interim based on Michigan Part 201. Because the City would like to redevelop the site for commercial use, a Phase II ESA was recommended to address the RECs identified for the site.

Figure 2 in Appendix A is a site layout map that shows the identified RECs and previous property uses.

1.3. PHASE II ESA TASKS

The primary concern regarding reuse at the MLK Parcels site is the potential presence of and exposure to contamination from previous property uses and identified RECs. The field activities included efforts to provide sufficient data to evaluate potential remediation and reuse for active recreational purposes. The Phase II ESA included ISM soil sampling and discrete soil boring sampling.

The tasks of the February 2025 START Phase II ESA are listed below:

• Prepare a HASP

• Prepare a SAP

• Prepare a QAPP addendum

• Procure subcontractors (driller and laboratory)

• Contact Michigan’s Utility Notification Center (MISS DIG) to mark underground utility locations in the proposed investigation areas.

• Characterize geology and hydrogeology at the site.

The ISM sampling procedures are described below.

• Develop DUs based on historical site use.

• Advance 50 ISM borings in each of the DUs identified for the site to a total depth of 4 feet bgs.

• Collect 50 incremental soil samples from each ISM boring from depth intervals of 0 to 2 feet and 2 to 4 feet bgs.

• Log the general geology of all soil borings noting fill materials or native soils, as observed.

• Submit the ISM soil samples to the laboratory

• Collect replicate and triplicate samples at a rate of one replicate and one triplicate in every ten DUs, selected from a DU that is expected to have high subsurface heterogeneity.

• Collect and properly dispose of investigation-derived waste (IDW), as needed.

• Submit samples for processing and mixing to be performed at the laboratory to produce a representative sample for analysis of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and Michigan 10 Metals (arsenic, barium, cadmium, chromium, copper, lead, mercury, selenium, silver, and zinc).

• Follow all high-volume sample preparation procedures for the ISM samples undergoing metals analysis.

The discrete soil sampling procedures are described below.

• Advance discrete soil borings to a maximum depth of 12 feet bgs or until groundwater is encountered.

• Screen all soil samples with a photoionization detector (PID) for every 2-foot depth interval.

• Log all soil borings in accordance with the United Soil Classification System (USCS).

• Collect soil samples for laboratory analysis from the 0- to 2-foot-depth interval and a deeper interval based on the highest PID screening result or obvious indications of contamination.

• Collect and properly dispose of IDW, as needed.

• Collect two soil samples from each soil boring for laboratory analysis for VOCs PAHs, PCBs, and Michigan 10 Metals.

• Collect four discrete soil boring samples from the MLK PIN 8007632 property 0- to 2-foot interval and a deeper interval to be laboratory analyzed for formaldehyde.

2 . I N V E S T I G A T I V E M E T H O D O L O G Y

START performed the Phase II ESA field investigation at the MLK Parcels from February 12 through February 21, 2025. The Phase II ESA investigative methodology is described in the following sections.

START collected soil samples using incremental sampling methodology (ISM) to assess the direct contact pathway at the site for the 0-to-2-foot bgs and the 2-to-4-foot bgs depth intervals.

Incremental sampling is a method for estimating the mean concentration of contaminants in a specified area called a Decision Unit (DU). A DU is the smallest volume of soil for which a decision will be made based on ISM sampling. START has identified DUs based on former site operations at the site. The ISM strategy was developed in accordance with the EGLE ISM guidance (EGLE

2018) and exposure barriers for the direct contact pathway guidance (EGLE 2024).

START also advanced discrete soil borings up to 12 feet below ground surface (bgs) or until groundwater was encountered at the site.

The site layout, DUs, and discrete soil boring locations are presented in Figure 2 of Appendix A.

The site activities were recorded in field notes and photographs were collected (Appendix B and

C)

2.1. ISM SOIL BORINGS AND SOIL SAMPLING

Before ISM soil sampling activities began, the drilling contractor contacted the Michigan Utility

Notification Center – MISS DIG System 811 to identify and mark utility locations.

ISM soil borings were advanced using a direct-push technology (DPT) drilling rig equipped with a

4-foot Macro-Core sampler to a depth of 4 feet bgs. A total of 50 ISM soil borings were advanced at each DU to a depth of 4 feet bgs. Sampling grid sizes are included in Table F-1 in Appendix F.

START located the proposed soil boring locations as specified in the approved SAP (Tetra Tech

2025).

A START environmental scientist described each ISM soil boring in accordance with ASTM

Method D 2488-17e1 (ASTM 2018). ISM soil boring notes are provided in Appendix B.

Two soil samples were collected from each ISM boring: one soil sample from 0 to 2 feet bgs and the second soil sample from 2 to 4 feet bgs. Approximately 25 grams of soil were collected from each increment. Samples were collected using plugging methods and consisted of approximately

10 to 15 plugs taken from each 2-foot interval in the Geoprobe sleeve for each increment. Sample increments for each depth interval in a DU were collected and placed in a large Ziploc baggie, placed on ice, and shipped via Federal Express to Eurofins Cleveland. Sample preparation and mixing occurred in the laboratory. ISM samples were laboratory analyzed for PAHs, PCBs, and

Michigan 10 metals.

Details on the historical use, address, parcel identification number, acreage, and DU increments sampled are provided in Table F-1 in Appendix F. ISM incremental boring locations are provided in Figures 3A through 3G of Appendix A.

START investigated nine DUs, and sampled two depth increments per DU for a total of 18 ISM soil samples. START originally intended on sampling at 13 DUs; however, DUs 9 through12 were unable to be ISM sampled because these parcels were developed as a park that included concrete areas, park benches, and elevated landscaped areas.

One replicate and one triplicate sample was collected from DU13 (labeled as DU14 and DU15) during the February 2025 field investigation. All samples were uniquely identified, labeled, and stored on ice for shipment to the laboratory. The results of the analyses are summarized in Section

4.1.

2.2. DISCRETE SOIL BORINGS AND SOIL SAMPLING

Before discrete soil boring activities began, the drilling contractor contacted the Michigan Utility

Notification Center – MISS DIG System 811 to identify and mark utility locations.

Discrete soil borings were advanced using a DPT drilling rig equipped with a 4-foot Macro-Core sampler to a depth of 12 feet bgs. START identified the proposed soil boring locations as specified in the approved SAP (Tetra Tech 2025).

A START environmental scientist described each soil boring in accordance with ASTM Method D

2488-17e1 (ASTM 2018). Soil boring logs are provided in Appendix D.

START logged soil for lithology and screened for evidence of VOCs using a PID. Soil samples collected from the 2-foot intervals were placed in a small, sealed bag to measure the PID readings.

PID screening results were recorded for each 2-foot interval and are summarized on the soil boring logs (Appendix D). Two soil samples were collected from each boring: one soil sample from near the surface and one sample from interval exhibiting elevated PID readings, odors, or staining.

Discrete soil samples were collected for laboratory analysis of VOCs using EPA Method 5035, PAHs, PCBs, Michigan 10 metals. Discrete soil boring samples collected from the MLK PIN

8007632 parcel were also laboratory analyzed for formaldehyde. Soil collected for analysis of non-VOCs was homogenized in accordance with the SAP, Generic QAPP and QAPP addendum

(Tetra Tech 2025, 2019, 2024a). Final boring locations are provided in Figure 2 of Appendix A.

START advanced 17 discrete soil borings at the MLK Parcels site and collected two investigative soil samples for each soil boring, for a total of 34 investigative soil samples. Two field duplicate soil samples were collected. All samples were uniquely identified, labeled, and stored on ice for shipment via Federal Express to the laboratory. The results of the analyses are summarized in

Section 4.2.

2.3. SAMPLE HANDLING, TRACKING, AND CUSTODY

This section describes sample labeling, sample packaging and shipping procedures, and QA/QC procedures for the soil samples.

2.3.1. Sample Labeling

All soil samples collected for laboratory analysis, including QC samples, were assigned a unique sample number in accordance with the approved SAP per the following format (Tetra Tech 2025):

MLK -MatrixXX(Y-Z)-MMDDYY

The symbols above have the following meanings:

• “MLK” indicates that the sample is from the “MLK Parcels” site.

• “Matrix” indicates the sample matrix as one of the following: “DU” for ISM decision unit samples, and “SB” for soil boring samples.

• “XX” indicates the location number.

• “Y-Z” represents the depth interval for soil samples.

• “mmddyy” indicates the date when the sample was collected.

Field duplicate samples were assigned a consecutive location number and marked as a duplicate in the field logbook. Examples of sample identifications for the Site are as follows:

• MLK-DU01-(0-2)-021725: ISM Soil Boring Sample from DU01 collected from depth interval 0 to 2 feet bgs on February 17, 2025.

• MLK-SB01-(0-2)-022325: Discrete soil boring sample number 01 collected from depth interval 0 to 2 feet bgs on February 23, 2025.

Discrete sample names are based on the DU they were collected from. A discrete sample taken from DU01 is named SB01. In cases where multiple discrete samples were taken from a DU location, a letter indicator of A or B was given to the sample name.

2.3.2. Sample Packaging and Shipping Procedures

All soil samples were identified, handled, shipped, tracked, and maintained under chain-of-custody procedures in accordance with the Generic QAPP, SAP, and QAPP addendum (Tetra

Tech 2019, 2025, 2024a).

2.3.3. Quality Assurance and Quality Control Procedures

Field QA/QC samples were obtained and submitted for analysis to assess the quality of the data that resulted from the field sampling program. No equipment blank samples were necessary since samples were collected using disposable sampling equipment. Field QA/QC samples included the following:

• Duplicates: START collected duplicate discrete soil samples in the field and submitted them to the laboratory. These samples were collected at a rate of 1 per every 20 investigative samples or at least 1 duplicate per matrix per sampling event. The duplicates were used to measure both laboratory precision and matrix variability.

• Replicates and Triplicates: START collected replicate and triplicate ISM soil samples in the field and submitted them to the laboratory. These samples were collected at a rate of 1 per every 10 DUs. The duplicates and triplicates were used to measure both laboratory precision and matrix variability.

• MS/MSD Samples: START collected MS/MSD discrete soil samples in the field and submitted them to the laboratory. These samples were collected at a rate of 1 per every 20 investigative samples. The MS/MSD samples were used to aid evaluation of possible matrix interference with analytical results.

• Trip Blank Samples: The laboratory provided trip blank samples to accompany shipments of soil samples for VOC analysis.

2.4. FIELD MEASUREMENTS AND RECORDKEEPING

The field team and project manager monitored adherence to the SAP, QAPP, and QAPP addendum (Tetra Tech 2025, 2019, 2024a). The sampling activities were documented in field notes and task-specific forms, such as soil boring logs (Appendix B and Appendix D).

Measurements and samples collected were recorded in the field notes or on field forms.

Photographs documenting field activities are provided in Appendix C.

2.5. DECONTAMINATION PROCEDURES

General decontamination procedures were followed as described in the SAP, Generic QAPP and

QAPP addendum (Tetra Tech 2025, 2019, 2024a). START decontaminated the Geoprobe sampling rod before each use, when sampling between locations, and at the end of the field investigation. Decontamination methods for sampling equipment consisted of an Alconox detergent wash followed by a potable water rinse.

2.6. WASTE CHARACTERIZATION AND MANAGEMENT

The SAP defines investigative-derived waste (IDW) as any byproduct of field activities suspected or known to be contaminated with hazardous substances (Tetra Tech 2025). Field activities generated spent personal protective equipment (PPE) and sampling supplies, such as Geoprobe sleeves. Spent PPE and sampling supplies were double-bagged and disposed of as dry solid waste.

Soil cuttings were returned to the boreholes as no visible contamination was observed during sampling.

Management of IDW followed procedures included in the SAP, Generic QAPP, and QAPP addendum (Tetra Tech 2025, 2019, 2024a).

2.7. ANALYTICAL METHODOLOGY

Eurofins Cleveland and Eurofins Washington conducted the laboratory analyses of the soil samples. Investigative samples were analyzed using one or more of the following analytical methods:

• VOCs: EPA SW-846 Method 8260D (Soil Preparation Method 5035)

• Formaldehyde: EPA SW-846 Method 8015

• PAHs: EPA SW-846 Method 8270E (Soil Preparation Method 3546)

• PCBs: EPA SW-846 Method 8082A (Soil Preparation Method 3546)

• Michigan 10 metals: EPA SW-846 Methods 6020B and 7471B (Soil Preparation Method

EPA 3050B)

• ISM Soil Preparation Method: 2D slabcake subsample

3 . E N V I R O N M E N T A L S E T T I N G

This section describes the regional physiography, regional geology and hydrogeology, and site-specific geology and hydrogeology.

3.1. REGIONAL PHYSIOGRAPHY

The USGS Detroit, Michigan, quadrangle 7.5-minute topographic map indicates that the site has an approximate elevation of 630 feet above mean sea level (USGS 1994). The site is generally flat but slopes south.

3.2. REGIONAL GEOLOGY AND HYDROGEOLOGY

The uppermost potential aquifer material is alluvium, which ranges from 0 to 75 feet thick in

Wayne County. The deposits consist of clay, silt, sand, and gravel. Water from wells tapped into alluvium may be hard. If alluvium is present, glacial deposits will underlie the alluvium.

In the Michigan Basin, glacial aquifers, consisting of sand and gravel, are part of a thick sequence of Pleistocene glacial deposits. Because of their complex depositional history, glacial lithologies cannot be regionally correlated in the subsurface. These deposits, which are 20 to 400 feet thick in Wayne County, include lacustrine, till, and outwash deposits. Lacustrine deposits primarily composed of clay and sand cover most of the county, and till deposits primarily composed of clay, silt, sand, gravel, and boulders can be found in some parts of the county. Moraines and till plains primarily composited of glacial till range from 180 to 400 feet thick. The till may contain isolated pockets of sand and gravel. In the northwest corner of the county, two moraines are present and trend northeast to southwest. The moraines are separated by an outwash deposit that is primarily composed of sand and gravel. Water from the outwash deposits may be hard. Glacial well transmissivity is approximately 56,330 square feet per day (USGS 2007).

The Wayne County bedrock underlying glacial deposits primarily consists of Mississippian and

Devonian aged units and includes the Coldwater Shale, Sunbury Shale, Berea Sandstone, Bedford Shale, Antrim Shale, Traverse Group, Dundee Limestone, and Detroit River Group. The bedrock units generally trend northeast to southwest, and dip to the northwest. Bedrock well water in the region may be mineralized (USGS 2007).

3.3. SITE GEOLOGY AND HYDROGEOLOGY

The general geologic profile of the site consists of fill material and clayey sand with trace gravel to a depth of approximately 6-feet bgs, followed primarily by clay to the maximum depth of the soil borings of 12 feet bgs.

Groundwater was not encountered in the soil borings to the maximum depth of 12 feet bgs; boring logs are provided in Appendix D.

4 . R E S U L T S

The results of the Phase II ESA are described in this section. The laboratory data packages are provided as Attachment 1, and the laboratory data Stage 1 verification checklist completed by a

START chemist is provided in Appendix E.

4.1. ISM SOIL

ISM soil samples were analyzed for VOCs, PAHs, PCBs, and Michigan 10 metals, and compared to the EGLE generic soil cleanup criteria for residential soil as specified in EGLE Rule 299.46 for residential cleanup (EGLE 2023) and the Volatilization to Indoor Air Pathway (VIAP) criteria

(EGLE 2013). Two replicate samples, MLK-DU14(0-2) and MLK-DU14(2-4), and two triplicate samples, MLK-DU15(0-2) and MLK-DU15(2-4) were collected for analyses of PAHs, PCBs, and

Michigan 10 metals. The replicate and triplicate sample results varied from the parent sample, thus, the highest concentrations for the DU should be used.

The analytical results for soil samples are summarized in Tables F-2 through F-5 in Appendix F.

Analytes exceeding the EGLE residential soil and VIAP criteria are highlighted in the tables. The soil results above the EGLE residential direct contact soil criteria are illustrated in Figure 4 of

Appendix A. Since all samples contained fill material, the results were not compared with EGLE

Part 201 Default Background Levels or Huron-Erie Glacial Lobe Background Values. Table 3 lists

ISM soil samples exceeding screening levels.

Table 3 — ISM Soil Samples with Chemicals of Concern (COCs) Exceeding Screening Levels

Source Exposure Route ISM Samples with Confirmed COCs Exceeding Screening Levels

Soil

EGLE

Residential Direct Contact Criteria

Benzo(a)pyrene: MLK-DU01(0-2), MLK-DU07(2-4), MLK-DU08(2-4) Arsenic: MLK-DU02(2-4), MLK-DU03(0-2), MLK-DU03(2-4), MLK-

DU06(0-2), MLK-DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-

DU08(2-4), MLK-DU14(0-2), and MLK-DU15(0-2)

Soil Residential VIAP Criteria

Naphthalene: MLK-DU01(0-2), MLK-DU01(2-4), MLK-DU03(0-2), MLK-

DU03(2-4), MLK-DU04(0-2), MLK-DU05(0-2), MLK-DU06(2-4), MLK-

DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-DU08(2-4), MLK-

DU13(2-4), MLK-DU14(0-2), MLK-DU14(2-4), MLK-DU15(0-2), and

MLK-DU15(2-4)

Phenanthrene: MLK-DU01(0-2), MLK-DU01(2-4), MLK-DU03(0-2), MLK-DU03(2-4), MLK-DU05(0-2), MLK-DU05(2-4), MLK-DU06(2-4), MLK-DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-DU08(2-4), MLK-DU13(2-4), MLK-DU15(0-2), and MLK-DU15(2-4) Mercury: MLK-DU01(0-2), MLK-DU01(2-4), MLK-DU02(0-2), MLK-

DU02(2-4), MLK-DU03(0-2), MLK-DU03(2-4), MLK-DU04(0-2), MLK-

DU04(2-4), MLK-DU05(0-2), MLK-DU05(2-4), MLK-DU06(0-2), MLK-

DU06(2-4), MLK-DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-

DU08(2-4), MLK-DU13(0-2), MLK-DU13(2-4), MLK-DU14(0-2), MLK-

DU14(2-4), MLK-DU15(0-2), and MLK-DU15(2-4)

Soil

EGLE

Residential Groundwater Surface Water Interface Protection Criteria

Fluoranthene: MLK-DU01(0-2), MLK-DU07(2-4), MLK-DU08(2-4) Phenanthrene: MLK-DU01(0-2), MLK-DU03(0-2), MLK-DU03(2-4), MLK-DU05(0-2), MLK-DU05(2-4), MLK-DU06(2-4), MLK-DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-DU08(2-4), MLK-DU15(2-4)

Arsenic: MLK-DU01(0-2), MLK-DU01(2-4), MLK-DU02(0-2), MLK-

DU02(2-4), MLK-DU03(0-2), MLK-DU03(2-4), MLK-DU04(0-2), MLK-

DU04(2-4), MLK-DU05(0-2), MLK-DU05(2-4), MLK-DU06(0-2), MLK-

DU06(2-4), MLK-DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-

DU08(2-4), MLK-DU13(0-2), MLK-DU13(2-4),MLK-DU14(0-2), MLK-

DU14(2-4), MLK-DU15(0-2), MLK-DU15(2-4)

Copper: MLK-DU03(0-2), MLK-DU03(2-4), MLK-DU04(2-4), MLK-

DU05(0-2), MLK-DU05(2-4), MLK-DU06(0-2), MLK-DU06(2-4), MLK-

DU07(0-2), MLK-DU07(2-4), MLK-DU08(2-4), and MLK-DU15(0-2) Selenium: MLK-DU01(0-2), MLK-DU03(0-2), MLK-DU04(0-2), MLK-

DU05(0-2), MLK-DU05(2-4), MLK-DU06(0-2), MLK-DU06(2-4), MLK-

DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-DU08(2-4), MLK-

DU13(0-2), MLK-DU13(2-4), MLK-DU14(0-2), MLK-DU14(2-4), MLK-

DU15(0-2), and MLK-DU15(2-4) Silver: MLK-DU01(0-2), MLK-DU02(0-2), MLK-DU02(2-4), MLK-

DU03(0-2), MLK-DU03(2-4), MLK-DU04(0-2), MLK-DU05(0-2), MLK-

DU05(2-4), MLK-DU06(0-2), MLK-DU06(2-4), MLK-DU07(0-2), MLK-

DU07(2-4), MLK-DU08(0-2), MLK-DU08(2-4), MLK-DU13(0-2), MLK-

DU14(0-2), MLK-DU15(0-2), and MLK-DU15(2-4)

Source Exposure Route ISM Samples with Confirmed COCs Exceeding Screening Levels

Soil (continued)

EGLE

Residential Groundwater Surface Water Interface Protection Criteria (continued)

Zinc: MLK-DU02(0-2), MLK-DU03(0-2), MLK-DU03(2-4), MLK-DU04(0-

2), MLK-DU05(0-2), MLK-DU05(2-4), MLK-DU06(0-2), MLK-DU06(2-4),

MLK-DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-DU08(2-4),

MLK-DU13(0-2), MLK-DU14(0-2), MLK-DU15(0-2), and MLK-DU15(2-4) Mercury: MLK-DU01(0-2), MLK-DU01(2-4), MLK-DU02(0-2), MLK-

DU02(2-4), MLK-DU03(0-2), MLK-DU03(2-4), MLK-DU04(0-2), MLK-

DU04(2-4), MLK-DU05(0-2), MLK-DU05(2-4), MLK-DU06(0-2), MLK-

DU06(2-4), MLK-DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-

DU08(2-4), MLK-DU13(0-2), MLK-DU13(2-4), MLK-DU14(0-2), MLK-

DU14(2-4), MLK-DU15(0-2), and MLK-DU15(2-4)

Soil

EGLE

Residential Drinking Water Protection Criteria

Arsenic: Arsenic was detected in MLK-DU01(0-2), MLK-DU01(2-4), MLK-DU02(0-2), MLK-DU02(2-4), MLK-DU03(0-2), MLK-DU03(2-4), MLK-DU04(0-2), MLK-DU04(2-4), MLK-DU05(0-2), MLK-DU05(2-4), MLK-DU06(0-2), MLK-DU06(2-4), MLK-DU07(0-2), MLK-DU07(2-4), MLK-DU08(0-2), MLK-DU08(2-4), MLK-DU13(0-2), MLK-DU13(2-

4),MLK-DU14(0-2), MLK-DU14(2-4), MLK-DU15(0-2), and MLK-

DU15(2-4)

Because groundwater is not used for potable purposes, the drinking water exposure pathway is not complete. No surface water bodies are on site, thus, the groundwater surface water interface protection criteria are not complete pathways and these exceedances are deemed to not be a concern.

The relevant complete exposure pathway is the residential direct contact pathway. These exceedances are summarized above in Table 3.

4.2. DISCRETE SOIL

Discrete soil samples were analyzed for VOCs, PAHs, PCBs, and Michigan 10 metals, and compared to the EGLE generic soil cleanup criteria for residential soil as specified in EGLE Rule

299.46 for residential cleanup (EGLE 2023) and EGLE VIAP criteria (EGLE 2013). Soil samples taken MLK PIN 8007632 parcel were also analyzed for formaldehyde and compared to the same criteria. Table 4 lists samples with COCs exceeding screening levels.

The analytical results for discrete samples are summarized in Tables F-2 through F-5 in

Appendix F. Analytes exceeding the EGLE residential criteria are highlighted in the tables. The results above the EGLE residential direct contact soil criteria are illustrated in Figure 4 of Appendix

A.

Table 4 — Discrete Soil Samples with COCs Exceeding Screening Levels

Route Samples with Confirmed COCs Exceeding Screening Levels

Soil

EGLE

Residential Direct Contact Criteria

Benzo(a)pyrene: MLK-SB01B(2-4), MLK-SB07(0-2), MLK-SB07(3-5), MLK-SB08(2-4), MLK-SB13A(0-2)

Lead: MLK-SB07(0-2), MLK-SB09(3-5), MLK-SB13A(2-4) Arsenic: MLK-SB04(0-2), MLK-SB06(0-2), MLK-SB07(0-2), MLK-

SB13A(2-4), MLK-SB13B(0-2)

Soil Residential VIAP Criteria

Benzene: MLK-SB07(3-5)

TCE: MLK-SB01A(0-2), MLK-SB01B(0-2), MLK-SB06(2-4), MLK-SB08(0-

2), MLK-SB08(2-4)

Phenanthrene: MLK-SB01B(2-4), MLK-SB07(0-2), MLK-SB07(3-5), MLK- SB08(2-4), MLK-SB12(3-5) and MLK-SB13A(0-2) Mercury: MLK-SB01A(0-2), MLK-SB01B(0-2), MLK-SB01B(2-4), MLK-

SB02A(0-2), MLK-SB02B(0-2), MLK-SB02B(3-5), MLK-SB05(0-2), MLK-

SB05(3-5), MLK-SB06(0-2), MLK-SB06(2-4), MLK-SB07(0-2), MLK-

SB07(3-5), MLK-SB08(0-2), MLK-SB08(2-4), MLK-SB09(3-5), MLK-

SB10A(2-4), MLK-SB10B(0-2), MLK-SB10B(2-4), MLK-SB11(0-2), MLK-

SB12(0-2), MLK-SB12(3-5), MLK-SB13A(0-2), MLK-SB13A(2-4), MLK-

SB13B(0-2)

Soil

Soil Volatilization to Indoor Air Inhalation Criteria

Trichloroethene (TCE): MLK-SB08(0-2) Naphthalene: MLK-SB01B(0-2), MLK-SB01B(2-4), MLK-SB07(0-2), MLK-

SB07(3-5), MLK-SB08(0-2), MLK-SB08(2-4), MLK-SB12(3-5), MLK-

SB13A(0-2) and MLK-SB13A(2-4)

Route Samples with Confirmed COCs Exceeding Screening Levels

Soil

EGLE

Residential Groundwater Surface Water Interface Protection Criteria

Trichloroethene (TCE): MLK-SB08(0-2) Fluoranthene: MLK-SB01B(2-4), MLK-SB13A(0-2) Phenanthrene: MLK-SB01B(2-4), MLK-SB07(0-2), MLK-SB07(3-5), MLK-

SB08(2-4), MLK-SB13A(0-2)

Arsenic: MLK-SB01A(0-2), MLK-SB01A(2-4), MLK-SB01B(2-4), MLK-

SB02A(0-2), MLK-SB02B(0-2), MLK-SB02B(3-5), MLK-SB03(0-2), MLK-

SB03(2-4), MLK-SB04(0-2), MLK-SB04(3-5), MLK-SB05(0-2), MLK-

SB05(3-5), MLK-SB06(0-2), MLK-SB07(0-2), MLK-SB07(3-5), MLK-

SB08(0-2), MLK-SB08(2-4), MLK-SB09(0-2), MLK-SB09(3-5), MLK-DUP02

(3-5), MLK-SB10A(2-4), MLK-SB10B(0-2), MLK-SB10B(2-4), MLKSB11(0-

2), MLK-SB11(2-4), MLK-SB12(0-2), MLK-SB12(3-5), MLK-SB13A(0-2),

MLK-SB13A(2-4), MLK-SB13B(0-2)

Copper: MLK-SB07(0-2), MLK-SB07(3-5), MLK-SB08(2-4) Selenium: MLK-SB05(3-5), MLK-SB06(2-4), MLK-SB07(0-2), MLK-

SB08(0-2), MLK-SB10A(2-4), MLK-SB10B(0-2), MLK-SB12(0-2), MLK-

SB13B(0-2)

Silver: MLK-SB01A(0-2), MLK-SB01A(2-4), MLK-SB01B(0-2), MLK-

SB02A(0-2), MLK-SB02B(0-2), MLK-SB05(0-2), MLK-SB06(0-2), MLK-

SB07(0-2), MLK-SB07(3-5), MLK-SB08(0-2),MLK-SB09(0-2) MLK-

SB13B(0-2)

Zinc: MLK-SB05(0-2), MLK-SB07(0-2), MLK-SB07(3-5), MLK-SB08(0-2), MLK-SB13A(2-4), MLK-SB13B(0-2)

Mercury: MLK-SB01A(0-2), MLK-SB01B(2-4), MLK-SB02A(0-2), MLK-

SB02B(0-2), MLK-SB02B(3-5), MLK-SB05(0-2), MLK-SB05(3-5), MLK-

SB06(0-2), MLK-SB07(0-2), MLK-SB07(3-5), MLK-SB08(0-2), MLK-

SB08(2-4), MLK-SB09(3-5), MLK-SB10A(2-4), MLK-SB10B(2-4), MLK-

SB12(0-2), MLK-SB12(3-5), MLK-SB13B(0-2)

Barium: MLK-SB13A(2-4)

Soil

EGLE

Residential Drinking Water Protection Criteria

Trichloroethene (TCE): MLK-SB06(2-4), MLK-SB08(0-2) Arsenic: MLK-SB01A(0-2), MLK-SB01A(2-4), MLK-SB01B(2-4), MLK-

SB02A(0-2), MLK-SB02B(0-2), MLK-SB02B(3-5), MLK-SB03(0-2), MLK-

SB03(2-4), MLK-SB04(0-2), MLK-SB04(3-5), MLK-SB05(0-2), MLK-

SB05(3-5), MLK-SB06(0-2), MLK-SB07(0-2), MLK-SB07(3-5), MLK-

SB08(0-2), MLK-SB08(2-4), MLK-SB09(0-2), MLK-SB09(3-5), MLK-DUP02

(3-5), MLK-SB10A(2-4), MLK-SB10B(0-2), MLK-SB10B(2-4), MLKSB11(0-

2), MLK-SB11(2-4), MLK-SB12(0-2), MLK-SB12(3-5), MLK-SB13A(0-2),

MLK-SB13A(2-4), MLK-SB13B(0-2)

Lead: MLK-SB13A(2-4) Silver: MLK-SB01A(2-4)

All other VOCs, PAHs, PCB, and Michigan 10 metals were detected below the applicable screening levels. In addition, formaldehyde was not detected in the soil samples from MLK-SB10A and MLK-SB10B.

START collected two duplicate samples for VOCs, PAHs, PCBs, and Michigan 10 metals. DUP-

01 correlates with MLK-SB01A-(2-4)-022125 and DUP-02 correlates with MLK-SB02A-(3-5)-

022125.

4.3. QUALITY ASSURANCE/QUALITY CONTROL

The QA/QC sample results were evaluated as part of the data review process. START prepared a laboratory data verification checklist at the request of EPA. The data package was deemed complete, although a determination of usability was not performed as a part of Stage 1 verification.

The Stage 1 data verification checklist is included in Appendix E.

5 . S U M M A R Y A N D R E C O M M E N D A T I O N S

From February 12 through 21, 2025, START conducted a Phase II ESA for the MLK Parcels site located in Detroit, Wayne County, Michigan. At the request and authorization of EPA, the Phase

II documented the presence of contamination in soil at the site. START completed the Phase II

ESA through EPA’s TBA program.

The field investigation included: drilling and sampling at 13 Decision units (DUs), collecting ISM samples at 9 of the DUs, and drilling and sampling 17 discrete soil borings within the 13 DUs at the site. The following sections summarize findings related to assessments of onsite soil.

5.1. ISM SOIL

The Phase II ESA included advancing ISM soil borings at nine DUs. START collected soil samples via standard soil sampling methods from depth intervals of 0 to 2 and 2 to 4 feet bgs at each DU.

START collected 18 investigative samples, two replicate samples, MLK-DU14(0-2) and MLK-

DU14(2-4), and two triplicate samples, MLK-DU15(0-2) and MLK-DU15(2-4) for analyses of

PAHs, PCBs, and Michigan 10 metals. The replicate and triplicate sample results varied from the parent sample, thus, the highest concentrations for the DU should be used.

Laboratory analytical results indicate that the soil at the site contains PAHs and metals at concentrations exceeding the EGLE Direct Contact criteria. In addition, naphthalene, phenanthrene, and mercury exceed the residential VIAP criteria. PAHs and metals exceed the

Residential Groundwater Surface Water Interface Protection Criteria and the Residential Drinking

Water Protection Criteria.

5.2. DISCRETE SOIL

START advanced 17 discrete soil borings and collected two soil samples from each soil boring for laboratory analysis of VOCs, PAHs, PCBs, and Michigan 10 metals. In addition, four discrete soil boring samples were collected for laboratory analysis for formaldehyde from MLK PIN

8007632 parcel.

Analytical results indicated benzo(a)pyrene, arsenic and lead were detected at concentrations exceeding the EGLE residential direct contact criteria. Benzene, TCE, phenanthrene, and mercury were detected at concentrations exceeding the EGLE residential VIAP criteria. TCE and naphthalene exceeded the EGLE soil volatilization to indoor air inhalation criteria.

TCE, PAHs and metals exceed the Residential Groundwater Surface Water Interface Protection

Criteria and the Residential Drinking Water Protection Criteria.

5.3. RECOMMENDATIONS

Based on the results of the both the ISM and discrete soil boring sampling conducted at the MLK

Parcels, exceedances of EGLE residential cleanup criteria were observed at all of the 13 DUs.

Therefore, the MLK Parcels are considered as a facility under EGLE Part 201.

Exceedances of direct contact criteria should be addressed by installation of engineered barriers or soil excavation and replacement with clean soil.

In addition, because of the presence of VOCs, PAH, or mercury in soil samples at concentrations exceeding the VIAP at the site, the indoor air pathway should be further evaluated, should buildings be constructed on the site in the future.

Remediation activities should be performed in accordance with EGLE regulations.

6 . R E F E R E N C E S

ASTM International (ASTM). 2018. “Standard Practice for Description and Identification of Soils (Visual-Manual Procedures).” Method D 2488-17e1.

ASTM. 2019. Standard Practice for Environmental Site Assessments: Phase II Environmental

Site Assessment Process. E 1903-19.

Michigan Department of Environment, Great Lakes, and Energy (EGLE). 2013. Guidance Document for the Vapor Intrusion Pathway. May.

EGLE. 2018. Incremental Sampling Methodology and Applications, Remediation and Redevelopment Division Resource Materials. January

EGLE. 2023. EGLE Part 201 Generic Cleanup Criteria and Screening Levels for Residential Soil.

October 12.

EGLE 2024. Exposure Barriers for the Direct Contact Pathway Under Part 201. March 20.

Tetra Tech, Inc. (Tetra Tech). 2019. Targeted Brownfields Assessment Grant Program Quality Assurance Project Plan (Generic QAPP) for Region 5 Targeted Brownfields Assessment Projects in Indiana, Illinois, Michigan, Minnesota, Ohio, and Wisconsin. Revision 2. August 16.

Tetra Tech. 2024a. Site-Specific Quality Assurance Project Plan (QAPP) Addendum. GSD Park Development and Expansion – MLK Parcels, Bieniek Park, New Puritan Park, and Weaver Extension Parcels, Detroit, Wayne County, Michigan. December 13.

Tetra Tech. 2024b. Phase I Environmental Site Assessment, GSD Park Development and Expansion – MLK Parcels, Detroit, Wayne County, Michigan. July.

Tetra Tech. 2025. Sampling and Analysis Plan (SAP). GSD Park Development and Expansion – MLK Parcels, Bieniek Park, New Puritan Park, and Weaver Extension Parcels, Detroit, Wayne County, Michigan. Revision 2. January 28.

U.S. Geological Survey (USGS). 1994. “7.5-Minute Series Topographic Map of Mount Pleasant, Michigan Quadrangle.”

USGS. 2007. Summary of Hydrogeologic Conditions by County for the State of Michigan.

Appendix A

A P P E N D I X A . F I G U R E S

Figure 1 — Site Location Map Figure 2 — Site Layout, Decision Units, Discrete Soil Sample Locations, and RECs Figure 3A —ISM Decision Units and Discrete Sample Locations – DU1 Figure 3B —ISM Decision Units and Discrete Sample Locations – DU2 and DU3 Figure 3C —ISM Decision Units and Discrete Sample Locations – DU4 and DU5 Figure 3D —ISM Decision Units and Discrete Sample Locations – DU6 and DU7 Figure 3E —ISM Decision Units and Discrete Sample Locations – DU8 Figure 3F —ISM Decision Units and Discrete Sample Locations – DU9 and DU10 Figure 3G —ISM Decision Units and Discrete Sample Locations – DU11, DU12, and DU13 Figure 4 —Soil Samples Exceeding Residential Direct Contact Criteria

F ile

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Date Saved: 3/19/2025

Michigan

GSD Park Development and Expansion MLK Parcels

Detroit, Wayne County, Michigan

Figure 1 Site Location Map

Prepared For: EPA Prepared By: Tetra Tech Inc.

EPA Contract No.: 68HE0519D0005 TO-TOLIN No.: F0107-0001EC260

2,000 0 2,000

Feet

Source: USGS 7.5-Minute Topographic Quadrangle Map: Detroit, MI 2023

Site Location

Reference Map

Coordinate System: NAD 1983 StatePlane Michigan South FIPS 2113 Feet Datum: North American 1983

Units: Foot US

Site Location

Legend

Approximate Site Boundary

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Date Saved: 10/18/2024 Coordinate System: NAD 1983 StatePlane Michigan South FIPS 2113 Feet Projection: Lambert Conformal Conic

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Prepared For: US EPA Prepared By: Tetra Tech EPA Contract No.: 68HE0519D0005

200 0 200

Feet

TO/TOLIN: F01070001EC260

Legend Proposed Soil Boring Location

Parcel identified in project info and access form provided Parcel not identified in project info and no access form provided Approximate Site Boundary

BEA = Baseline environmental assessment DU = Decision Unit ISM = Incremental Sampling Methodology MLK = Martin Luther King Parcels REC = Recognized Environmental Condition

GSD Park Development and Expansion MLK Parcels, Bieniek Park, New Puritan Park, and Weaver Extension Parcels Detroit, Wayne

County, Michigan Figure 2

Site Layout, ISM Decision Units, Discrete Sample Locations, and RECs - MLK Parcels

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Date Saved: 3/27/2025 Coordinate System: NAD 1983 StatePlane Michigan South FIPS 2113 Feet Projection: Lambert Conformal Conic

Prepared For: US EPA Prepared By: Tetra Tech

EPA Contract No.: 68HE0519D0005

20 0 20

Feet

TO/TOLIN: F01070001EC260

Legend

Discrete Soil Boring Location

ISM Increment Sample

MLK-DU01

Approximate Site Boundary

DU = Decision Unit

ISM = Incremental Sampling Methodology

MLK = Martin Luther King Parcels

GSD Park Development and Expansion MLK Parcels, Bieniek Park, Davison Skate Park, New Puritan Park, and Weaver Extension Parcels

Detroit, Wayne County, Michigan

Figure 3A ISM Decision Units and Discrete

Sample Locations - MLK Parcels DU-01

SB02A

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SB03

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Date Saved: 3/27/2025 Coordinate System: NAD 1983 StatePlane Michigan South FIPS 2113 Feet Projection: Lambert Conformal Conic

Prepared For: US EPA Prepared By: Tetra Tech

EPA Contract No.: 68HE0519D0005

10 0 10

Feet

TO/TOLIN: F01070001EC260

Legend

Discrete Soil Boring Location

ISM Increment Sample

MLK-DU-02

MLK-DU-03

Approximate Site Boundary

DU = Decision Unit

ISM = Incremental Sampling Methodology

MLK = Martin Luther King Parcels

GSD Park Development and Expansion MLK Parcels, Bieniek Park, Davison Skate Park, New Puritan Park, and Weaver Extension Parcels

Detroit, Wayne County, Michigan

Figure 3B ISM Decision Units and Discrete Sample Locations - MLK Parcels DU-02 & DU-03

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Date Saved: 3/27/2025 Coordinate System: NAD 1983 StatePlane Michigan South FIPS 2113 Feet Projection: Lambert Conformal Conic

Prepared For: US EPA Prepared By: Tetra Tech

EPA Contract No.: 68HE0519D0005

20 0 20

Feet

TO/TOLIN: F01070001EC260

SB04

SB05

Legend

Discrete Soil Boring Location

ISM Increment Sample

MLK-DU-04

MLK-DU-05

Approximate Site Boundary

DU = Decision Unit

ISM = Incremental Sampling Methodology

MLK = Martin Luther King Parcels

GSD Park Development and Expansion MLK Parcels, Bieniek Park, Davison Skate Park, New Puritan Park, and Weaver Extension Parcels

Detroit, Wayne County, Michigan

Figure 3C

Locations - MLK Parcels DU-04 & DU-05

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Prepared For: US EPA Prepared By: Tetra Tech

EPA Contract No.: 68HE0519D0005

20 0 20

Feet

SB06

SB07

TO/TOLIN: F01070001EC260

Legend

Discrete Soil Boring Location

ISM Increment Sample

MLK-DU-06

MLK-DU-07

Approximate Site Boundary

DU = Decision Unit

ISM = Incremental Sampling Methodology

MLK = Martin Luther King Parcels

GSD Park Development and Expansion MLK Parcels, Bieniek Park, Davison Skate Park, New Puritan Park, and Weaver Extension Parcels

Detroit, Wayne County, Michigan

Figure 3D

Locations - MLK Parcels DU-06 & DU-07

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\G S

D P ar k

D ev el op m en t A rc

P R

O \G

S D

P ar k D ev el op m en t…