Appendix_6-Supplemental_Phase_II_Environmental_Site_Assessment-6-9-23.pdf

SUPPLEMENTAL PHASE II

ENVIRONMENTAL SITE ASSESSMENT

Proposed Community Park Site 130th Avenue and 128th Street, Largo, Pinellas County, FL

June 9, 2023

Prepared for:

Pinellas County Capital Improvements Division of Public Works Stormwater/Parks Section 14 S Ft Harrison Ave, 4th Floor Clearwater Florida 33756 Attn: Rhonda Bowman, PE, rbowman@co.pinellas.fl.us

Prepared by:

Greg Schultz, PE Senior Project Manager Stantec 380 Park Place Blvd, Suite 300 Clearwater, FL 33759

Project Number:

172608008

Supplemental Phase II Environmental Site Assessment

Project Number: 172608008

Revision Description Author Date Quality Check

Date Independent Review

Date

0 Initial Document

Greg Schultz

6/9/2023 Joe Marsh 6/9/23

Project Number: 172608008

The conclusions in the Report titled Supplemental Phase II Environmental Site Assessment are Stantec’s professional opinion, as of the time of the Report, and concerning the scope described in the Report. The opinions in the document are based on conditions and information existing at the time the scope of work was conducted and do not take into account any subsequent changes. The Report relates solely to the specific project for which Stantec was retained and the stated purpose for which the Report was prepared. The Report is not to be used or relied on for any variation or extension of the project, or for any other project or purpose, and any unauthorized use or reliance is at the recipient’s own risk.

Stantec has assumed all information received from Pinellas County (the “Client”) and third parties in the preparation of the Report to be correct. While Stantec has exercised a customary level of judgment or due diligence in the use of such information, Stantec assumes no responsibility for the consequences of any error or omission contained therein.

This Report is intended solely for use by the Client in accordance with Stantec’s contract with the Client.

While the Report may be provided by the Client to applicable authorities having jurisdiction and to other third parties in connection with the project, Stantec disclaims any legal duty based upon warranty, reliance or any other theory to any third party, and will not be liable to such third party for any damages or losses of any kind that may result.

Prepared by:

Signature

Greg Schultz, PE

Printed Name

Reviewed by:

Joe Marsh

Approved by:

Greg Schultz, PE

Project Number: 172608008 i

Table of Contents

EXECUTIVE SUMMARY ............................................................................................................ II ACRONYMS / ABBREVIATIONS ............................................................................................. IV

1 INTRODUCTION

1.1 Site Description and Location

1.2 Site History / Previous Assessments

1.3 Land Uses

1.4 Purpose of Supplemental Phase II Soil Investigation

1.5 Special Terms and Conditions (User Reliance)

2 ASSESSMENT METHODOLOGY

2.1 Sampling Objectives

2.1.1 Conceptual Site Model and Sampling Plan

2.1.2 Chemical Testing Plan/QAQC

2.2 Field Investigation and Methods

2.2.1 Soil Sampling Activities – April 2023 Event

3 ANALYTICAL DATA RESULTS

3.1 Soil

3.2 Laboratory Analyses Quality Control Observations and Interpretations

4 DISCUSSION OF FINDINGS AND CONCLUSIONS

4.1 Affected Media

4.1.1 Soil Summary

4.2 Evaluation of Data Quality

5 95% UPPER CONFIDENCE LIMIT EVALUATION

6 RECOMMENDATIONS

LIST OF TABLES

Table 1 – Soil Analytical Data Summary

LIST OF FIGURES

Figure 1 – USGS/Site Vicinity Map Figure 2 – Site Plan Figure 3 – Soil Quality 0-0.5 ft bls, April 2023 Figure 4 – Soil Quality 0.5-2 ft bls, April 2023

LIST OF APPENDICES

Appendix A – Field notes Appendix B – laboratory Analytical Report Appendix C – 95% UCL Calculation Sheets

Project Number: 172608008 ii

Executive Summary

Stantec has completed a Supplemental Phase II Environmental Site Assessment (ESA) at the Dansville Community Park site (Site), formerly referred to as the Danville Stormwater Pond Parcels. The Site is located generally northeast of 130th Avenue North (a/k/a Wilcox Road) and 128th Street North (a/k/a Pine Street SW) in unincorporated Pinellas County, Florida. Chastain Skillman (CS) conducted a Phase I Environmental Site Assessment in September 2007 for a 30-acre area of Dansville that included the subject site. The 2007 Phase I ESA identified historical area-wide debris disposal, historical site use as an auto salvage yard, storage, or repair business; as well as a construction yard as Recognized Environmental Conditions (RECs)

CS also conducted a Preliminary ESA in April 2011 that focused on a group of six parcels located approximately 200 feet north of the Site, which were included in the Phase I ESA study area and are identified as the Danville Central Landfill Site. Based on previous investigations, the 2011 assessment for the Dansville Central Site focused on soil collection and analysis for polycyclic aromatic hydrocarbons (PAHs), arsenic, and lead. Recent investigations on the Dansville Central Landfill Site in May 2023 indicate that PAH impacts to shallow soil are fully defined in the upper two feet of the soil profile and that aluminum, iron and manganese impacts to groundwater appear consistent with area-wide background concentrations.

Stantec prepared a limited Phase II ESA in June 2022 based on the above information that was available at the time. The assessment included the following activities:

• a geophysical survey,

• installation of 15 soil borings for organic vapor analyzer (OVA) screening and collection of thirty

(30) soil samples for a broad list of parameters including:

o PAHs via EPA Analytical Method 8270C o Total Recoverable Petroleum Hydrocarbons (TRPH) Via the Florida Petroleum Range

Organics (FL-PRO) Method o 8 Resource and Conservation Recovery Act (RCRA) Metals via EPA Analytical Method

6010/7471 o Organochlorine pesticides via EPA Analytical Method 8081 o Polychlorinated Biphenyls (PCBs) via EPA Analytical Method 8082 PAHs

• Installation and sampling of three monitoring wells for the same parameters as the soil (excluding PCBs)

The results of the 2022 Phase II investigation identified limited exceedances for arsenic and PAHs in site soil but no groundwater contamination. Miscellaneous wood and/or concrete debris were also noted in select boring logs.

Based on these results, Stantec conducted supplemental Phase II ESA sampling in April 2023. A total of twenty-seven (27) soil borings were manually installed to further evaluate previous detections. All soil borings were advanced to 4 feet (ft) below land surface (bls) for collection of confirmatory and step-out delineation samples at 10-ft and 20-ft intervals. Stantec collected soil screening samples at one-foot

Project Number: 172608008 iii intervals to the total sample depth of 4 ft bls for OVA field screening using an OVA equipped with a Photoionization Detector (PID).

Additionally, Stantec generally collected soil samples from each soil boring, at 0-0.5 ft bls, 0.5-2 ft bls, and 2-4 ft bls for potential laboratory analysis. Based on prior sample results, select interval samples were not collected, resulting in a total of seventy-three (73) samples for potential laboratory analysis. Samples were recollected at SB-3, SB-7, and SB-13 to confirm prior exceedances of Soil Cleanup Target Levels (SCTLs) and step-out samples and deeper interval samples were generally archived at the laboratory for contingent analysis based on initial results. Select samples were analyzed for PAHs via EPA Method 8270C SIM and/or arsenic via EPA Method 6010.

Based on a lack of SCTL exceedances in the resampling of SB-13, analysis of the step-out samples was canceled, and the reported data do not indicate soil impacts at this location. Analytical results for the resampling of SB-3 and analysis of the 10-ft step-out borings identified no arsenic exceedances in the 0-

0.5 ft or 0.5-2 ft bls samples. Based on these results soil impacts are not indicated at SB-3.

Laboratory analysis of the 10-ft step-out soil samples 10 the north and west of SB-7 did identify PAHs and arsenic exceeding applicable residential SCTLs (R-SCTLs) in select locations and the 20-ft step-out samples were analyzed in an effort to delineate the observed impacts. The 20-ft step-out sample results indicate that arsenic impacts were fully defined and that while PAHs (expressed as benzo(a)pyrene toxicity equivalents [BaP-EQ]) were vertically defined to the 0-0.5 ft bls interval, the northern extent of these impacts remains undefined.

Stantec utilized the US EPA ProUCL statistical software package to analyze the data sets for BaP-EQ and arsenic in the 0-0.5 ft bls and 0.5-2 ft bls intervals. Note that the full data set including initial March 2022 sample results and data from the April 2023 resampling was utilized to provide the most conservative estimation.

The results (detailed in Section 5) indicated that the 95% Upper Confidence Limit (UCL) of the mean BaP-EQ concentrations (0.188 mg/kg) in the 0-0.5 ft bls interval exceeded the R-SCTL of 0.1 milligram per kilogram (mg/kg). The calculated 95% UCLs for BaP-EQ in the 0.5-2 ft bls interval and for arsenic in both intervals did not exceed applicable SCTLs.

Based on the above, Stantec recommends the following:

• Limited additional soil sampling to define the extent of BaP-EQ impacts in the SB-7 20N 0-0.5 ft bls sample. This sampling can be conducted prior to the limited source removal, or the shallow removal action can be conducted, and confirmatory soil samples collected along the northern edge of the excavation to document complete removal to below applicable SCTLs for unrestricted land use.

• No further evaluation of arsenic at the site.

• Based on conversations with the County, Stantec recommends limited shallow source removal of identified BaP-EQ impacts in the vicinity of SB-7, followed by preparation of a soil and debris management plan for use during construction in the event suspect soils or debris are encountered.

Project Number: 172608008 iv

Acronyms / Abbreviations ASTM American Society of Testing and Materials AST Above-Ground Storage Tank BaP-EQ Benzo(a)pyrene Toxicity Equivalents DTW Depth-to-Water DPT Direct Push Technology ESA Environmental Site Assessment EOB End of Boring FDEP Florida Department of Environmental Protection ft bls Feet Below Land Surface ft Feet FGS Fine Grain Sand GCTL Groundwater Cleanup Target Level GPR Ground Penetrating Radar GWL Groundwater Leachability Criteria HA Hand Auger IDW Investigative Derived Waste MDLs Method Detection Limits mg/kg milligrams per kilogram MTBE Methyl tert-butyl Ether MW Monitor Well NAVD North American Vertical Datum NELAP National Environmental Laboratory Accreditation Program OVA Organic Vapor Analyzer PAHs polycyclic aromatic hydrocarbons PCBs Polychlorinated Biphenyls ppm parts per million PVC Polyvinyl Chloride QA Quality Assurance QC Quality Control RCRA Resource and Conservation Recovery Act REC Recognized Environmental Condition SCTLs Soil Cleanup Target Levels SFS Silty Fine Sand SOPs Standard Operating Procedures Sq ft Square Foot TEFs Toxic Equivalency Factors TRPH Total Recoverable Petroleum Hydrocarbons UCL Upper Confidence Limit USEPA United States Environmental Protection Agency UST Underground Storage Tank

1 Introduction

Project Number: 172608008 1

1.1 Site Description and Location

The subject property (Site) is located generally northeast of 130th Avenue North (a/k/a Wilcox Road) and 128th Street North (a/k/a Pine Street SW) in unincorporated Pinellas County, Florida. The site currently is undeveloped, vacant commercial land, with the majority of Parcel 08-30-15-20342-000-2260 consisting of a large stormwater pond (as depicted in Figures 1 and 2). The parcels included in the study area are listed below with current recorded street address, short legal description, and parcel ID numbers (as contained in County files):

• Dansville- PHASE 2 LOT 227, Parcel ID: 08-30-15-20342-000-2270

• Dansville- PHASE 2 LOT 226, Parcel ID: 08-30-15-20342-000-2260

1.2 Site History / Previous Assessments

Stantec (formerly Stantec) reviewed a Phase I ESA prepared by Chastain Skillman (CS) in September 2007 for 83 parcels of land totaling 30 acres located in the Dansville area of Pinellas County. The two parcels comprising the subject property were included within this broader study area and the review revealed the following:

• The CS report referenced previous assessment reports conducted in 1994, 1997, 2000, and 2003 that revealed the Site is included in an area historically filled with land-clearing debris. Boring activities conducted in 1994 revealed concrete, wood, and metal debris within the current retention pond area. The CS report summarizes a Solid Waste Investigation conducted in 2000 by Law Engineering (Law), which included test pits within the east and west portion of the pond location (prior to pond construction). The summary indicates Law found domestic solid waste with exceedances of Chapter 62-777, Florida Administrative Code (FAC), Table II Soil Cleanup Target Levels (SCTLs) for arsenic and dieldrin along with slightly elevated concentrations of other metals, polycyclic aromatic hydrocarbons (PAHs), pesticides, and polychlorinated biphenyls (PCBs) in soils; but at levels below their associated SCTLs.

• The 2007 Phase I Environmental Site Assessment (ESA) found no records of underground storage tanks (USTs) within the subject site boundaries.

• Historical resources indicated that the Site may have been part of land uses that included auto salvage, storage, or repair businesses, as well as a construction yard.

• The CS Phase I ESA identified the following Recognized Environmental Conditions (RECs) based on the above:

1) The former Terra Excavating Inc. property to the north of the larger study area formerly contained an 8,000-gallon diesel fuel above-ground storage tank (AST). While no reported discharges or releases were identified in agency files, the AST’s proximity and the potential for unreported releases was considered an REC for the larger study area but is not a concern for the subject site based on its location more than 850 ft to the north.

2) Interview information revealed a former gasoline service station was located on the southeast corner of Pine Street and 132nd Avenue. Agency records revealed that no

Project Number: 172608008 2 groundwater had been collected as part of the former station’s storage tank closure. The potential for migrating petroleum impacts was considered an REC.

3) The on-site waste debris was considered an REC due to the potential for hazardous materials and/or petroleum products to be a part of the debris.

4) The former on-site auto salvage, storage and repair was considered an REC.

County-owned parcels located approximately 200 ft north of the Site were included in the Phase I ESA study area; and were referred to as the Dansville Central Landfill site due to historical debris disposal.

The most recent soil and groundwater assessment activities conducted on those parcels during February 2022, indicated that PAH impacts to shallow soil remain undefined and that secondary groundwater standard exceedances for aluminum, iron, and manganese were identified in monitoring wells.

The 2007 CS report contained summary information relative to historical investigations dating back to 1994 for the larger Dansville area; this information was reviewed to evaluate data germane to the subject site, but the actual historical reports were not provided for review. No previous assessments related to the subject site were found in agency files. In addition, no additional assessment data was provided by the current owner/end user.

Based on Stantec’s review of the 2007 Phase I ESA that included the subject site, a 2011 Phase II ESA that included a nearby property with similar site history, and more recent assessment data at that site, Stantec recommended soil and shallow groundwater assessment within the subject site boundaries.

Pinellas County (Client) subsequently retained Stantec to perform soil and groundwater sampling based on the identified RECs to evaluate State cleanup target levels (CTLs) and potential impacts associated with potentially enlarging the existing stormwater pond and developing the site as a community park.

Stantec conducted Limited Phase II ESA investigation activities in March/April 2022 as follows:

• Prepared a site-specific Quality Assurance Project Plan (QAPP) in accordance with United States

Environmental Protection Agency (EPA) Brownfield Program requirements.

• Oversaw a geophysical survey to assist in identifying if fill material/debris remain on the property.

• Installed fifteen (15) soil borings (SB-1 through SB-15) to 10 feet below land surface (ft bls) for organic vapor analyzer (OVA) screening and collection of soil samples for laboratory analysis of COCs.

• Installed three temporary groundwater monitor wells to 12 ft bls (TMW-1, TMW-2, TMW-3) with TMW- 2 and TMW-3 co-located at two soil boring locations (SB-6 and SB-14, respectively). Additionally, Stantec collected groundwater samples from these locations for laboratory analysis of COCs.

The Limited Phase II ESA identified PAHs and arsenic in soil exceeding their SCTLs for Residential Direct Exposure, but no groundwater contamination was identified. Therefore, Stantec recommended additional delineation of soil impacts to further evaluate Site soils.

1.3 Land Uses

The subject property is in an area of Largo comprised primarily of residential housing. At the time of this investigation, the site was undeveloped, vacant land, with the majority of Parcel 08-30-15-20342-000- 2260 consisting of a stormwater pond.

Project Number: 172608008 3

1.4 Purpose of Supplemental Phase II Soil Investigation

This supplemental Phase II ESA investigation consisted of step-out soil borings to confirm and delineate exceedances of SCTLs noted in the June 2022 Phase II ESA report.

1.5 Special Terms and Conditions (User Reliance)

No ESA can eliminate all uncertainty. Furthermore, any sample, either surface or subsurface, taken for chemical analysis may or may not be representative of a larger population. Professional judgment and interpretation are inherent in the process and uncertainty is inevitable. Additional assessment may be able to reduce the uncertainty. Even when Phase II ESA work is executed with an appropriate site-specific standard of care, certain conditions present especially difficult detection problems. Such conditions may include, but are not limited to, complex geological settings, the fate and transport characteristics of certain hazardous substances and petroleum products, the distribution of existing contamination, physical limitations imposed by the location of utilities and other man-made objects, and the limitations of assessment technologies.

Phase II ESAs do not generally require an exhaustive assessment of environmental conditions on a property. There is a point at which the cost of information obtained, and the time required to obtain it outweigh the usefulness of the information and, in fact, may be a material detriment to the orderly completion of transactions. If hazardous substance or petroleum releases are confirmed on a parcel of property, the extent of further assessment is related to the degree of uncertainty that is acceptable to the user with respect to the real estate transaction. Measurements and sampling data only represent the site conditions at the time of data collection. Therefore, the usability of data collected as part of this Phase II ESA may have a finite lifetime depending on the application and use being made of the data. An environmental professional should evaluate whether the generated data are appropriate for any subsequent use beyond the original purpose for which it was collected.

This report is for the use and benefit of and may be relied upon by the entity(s) identified in the Executive Summary of this report as the Client (Pinellas County), as well as any of its affiliates and their respective successors and assigns, in accordance with the terms and conditions in place between Stantec and the Client for this project. Any third party agrees by accepting this report that any use or reliance on this report shall be limited by the exceptions and limitations in this report, and with the acknowledgment that actual site conditions may change with time, and that hidden conditions may exist at the property that were not discovered within the authorized scope of the assessment. Any use by or distribution of this report to third parties, without the express written consent of Stantec is at the sole risk and expense of such third party.

Stantec makes no other representation to any third party except that it has used the degree of care and skill ordinarily exercised by environmental consultants in the preparation of the report and in the assembling of data and information related thereto. No other warranties are made to any third party, either expressed or implied.

2 Assessment Methodology

Project Number: 172608008 4

2 Assessment Methodology

2.1 Sampling Objectives

2.1.1 CONCEPTUAL SITE MODEL AND SAMPLING PLAN

The conceptual site model considered the historical on-site and nearby land uses. Potential distribution of contaminants, as well as the anticipated fate and transport characteristics of contaminants in the setting being assessed were also considered. The sampling plan for this Supplemental Phase II ESA was designed to confirm and further evaluate the residential direct exposure exceedances identified during the previous investigation. Soil samples were recollected to evaluate prior detections and the decision to analyze step-out samples was generally based on the initial results. Initial 10-ft step-out soil samples were marked on the chain of custody for analysis to reduce the time associated with the iterative contingent analysis of step-out samples and avoid potential holding time expiration for the 20-ft step-outs. While the instructions to the laboratory were to hold the step-out data until review of the confirmatory results at the original borings were reviewed, preliminary results were reported at SB-3 and SB-7 concurrently with the 10-ft step-out data and that information is reflected in this report. Soil boring SB-13 was the last location sampled and the reporting issue was identified prior to receipt of preliminary data. As discussed in Section 4, confirmatory sample results at SB-13 showed no SCTL exceedances and the step-out sample data analysis was canceled.

2.1.2 CHEMICAL TESTING PLAN/QAQC

The chemical testing plan was designed to detect the contaminants identified during the prior sampling event. This testing plan included tests which provide quality assurance (QA) and techniques that provide quality control (QC) over the chemical analysis. A completed chain-of-custody record accompanied each sample shipment to the analytical laboratory. Chain of custody records provide written documentation regarding sample collection and handling, identify the persons involved in the chain of sample possession, and a written record of requested analytical parameters.

2.2 Field Investigation and Methods

2.2.1 SOIL SAMPLING ACTIVITIES – APRIL 2023 EVENT

Stantec installed twenty-seven (27) soil borings via hand auger at the locations depicted on Figures 2-4. All soil borings were advanced to 4 ft bls for collection of confirmatory and step-out delineation samples at 10-ft and 20-ft intervals. Stantec collected soil screening samples at one-foot intervals to the total sample depth of 4 ft bls for OVA field screening using an OVA equipped with a Photoionization Detector (PID).

3 Analytical Data Results

Project Number: 172608008 5

Additionally, Stantec generally collected soil samples from each soil boring, at 0-0.5 ft bls, 0.5-2 ft bls, and 2-4 ft bls for potential analysis. Based on prior sample results select interval samples were not collected, resulting in a total of seventy-three (73) samples for potential laboratory analysis. Samples were recollected at SB-3, SB-7, and SB-13 to confirm prior exceedances of SCTLs, and step-out samples and deeper interval samples were generally archived at the laboratory and analyzed based on initial results. All field activities were conducted in accordance with the approved QAPP and relevant Florida Department of Environmental Protection (FDEP) Standard Operating Procedures (DEP SOP-001/01). Field sampling logs are included in Appendix A.

Soil samples collected for laboratory analysis were preserved and sent to the National Environmental Laboratory Accreditation Program (NELAP)-accredited Advanced Environmental Laboratories, Inc. (AEL), for analysis of select samples for PAHs via EPA Analytical Method 8270C and/or the metal arsenic via EPA Analytical Method 6010 based on prior exceedances or initial step-out results.

3 Analytical Data Results

3.1 Soil

Soil field screening results are noted in field logs included as Appendix A. In summary, no OVA/PID readings were encountered above the 10 parts per million (ppm) level generally considered indicative of potential contamination by volatile organic compounds.

A comparison of the laboratory analytical results of the collected soil samples to SCTLs is presented for arsenic and PAHs in Table 1. To assess PAH Direct Exposure risks, carcinogenic PAHs (cPAHs) were converted to benzo(a)pyrene-equivalents (BaP-EQ) using Toxic Equivalency Factors (TEFs) as presented in Table 1. As noted in Section 2, confirmatory sample results at SB-13 did not identify SCTL exceedances and the step-out sample analysis was canceled. While the confirmatory samples from SB-3 did not identify arsenic above the R-SCTL, the 10-ft step-out samples were analyzed, and none of the step-out samples contained exceedances of the R-SCTL. The 20-ft step-out samples at this location were also canceled based on a lack of impacts in the 10-ft step-out samples. Similar to SB-3, the confirmatory soil sample collected from the 0-0.5 ft bls interval of SB-7 did not confirm prior arsenic and PAH exceedances, but both arsenic and PAHs were detected in the 10-ft step-out samples and based on those detections, select 20-ft step-out samples were also analyzed. Exceedances of the R-SCTL for PAHs were confirmed in the 20-ft step-out sample in the 0-0.5 ft bls interval only to the north of SB-7.

Laboratory results are presented in Table 1 and depicted for the 0-0.5 ft bls and 0.5-2 ft bls vertical intervals on Figures 3 and 4, respectively.

4 Discussion of Findings and Conclusions

Project Number: 172608008 6

3.2 Laboratory Analyses Quality Control Observations and

Interpretations

No significant QA/QC issues were encountered by the laboratory. All samples were received in good condition and all method-specified holding times were met. Minor exceptions noted on select surrogate recoveries and quality control batch samples and did not affect data quality or usability.

Laboratory Analytical Reports are included as Appendix B.

4 Discussion of Findings and Conclusions

4.1 Affected Media

4.1.1 SOIL SUMMARY

SB-3

Arsenic was not detected above the R-SCTL of 2.1 mg/kg in either the 0.5-2 ft bls confirmatory sample at SB-3 or the upper two sample intervals (0-0.5 ft and 0.5-2 ft bls) in any of the 10-ft step-out soil borings.

Samples from the 20-ft step-out samples were not analyzed based on the lack of exceedances in the 10-ft step-out samples.

SB-7

Arsenic exceeded the R-SCTL only at SB-7-10N 0-0.5 ft and was fully defined horizontally and vertically as shown on Table 1.

PAHs expressed as BaP-EQ exceeded the R-SCTL of 0.1 mg/kg at the following locations:

• SB-7-10N 0-0.5 ft (0.2 mg/kg)

• SB-7-20N 0-0.5 ft (0.56 mg/kg)

• SB-7-10W 0-0.5 ft (0.19 mg/kg)

While the impacts at these locations were vertically defined by unimpacted samples in the deeper 0.5-2 ft bls interval, the horizontal extent of impacts to the north of SB-7-20N remain undefined.

SB-13

The confirmatory soil samples at SB-13 0.5-2 ft bls and SB-13 2-4 ft bls had no exceedances for PAHs and based on the lack of exceedances the 10-ft and 20-ft step-out samples were canceled.

Based on the data reported, no SCTL exceedances were noted at SB-3 or SB-13, however the extent of shallow PAH impacts remains undefined 20 ft to the north of SB-7.

5 95% Upper Confidence Limit Evaluation

Project Number: 172608008 7

4.2 Evaluation of Data Quality

The data gathered during this assessment has been deemed acceptable from a quality assurance perspective and is sufficient to evaluate the extent of previously identified impacts.

5 95% Upper Confidence Limit Evaluation Stantec utilized US EPA ProUCL statistical software package to analyze the data sets for BaP-EQ and arsenic in the 0-0.5 ft bls and 0.5-2 ft bls intervals. Note that the full data set including initial March 2022 sample results and data from the April 2023 resampling was utilized to provide the most conservative estimation. Based on the statistical analysis the following information is presented.

BaP-EQ 0-0.5 ft

The data set for this interval included a total of 23 results consisting of 17 detections and 6 non-detect values. The maximum detected value was 0.56 mg/kg, and the minimum detected value was 0.0032 mg/kg, with a mean concentration of 0.121 mg/kg. The data appeared to follow a gamma distribution at the 5% significance level and the recommended 95% Upper Confidence Limit (UCL) of the mean for BaP- EQ was 0.188 mg/kg. This value exceeds the R-SCTL of 0.1 mg/kg and indicates that remediation may be warranted, unless an alternative SCTL is proposed utilizing a deed restriction to limit uses to non-residential (i.e., recreational, or commercial/industrial).

BaP-EQ 0.5-2 ft

The data set for this interval included a total of 20 results consisting of 13 detections and 7 non-detect values. The maximum detected value was 0.27 mg/kg, and the minimum detected value was 0.0022 mg/kg, with a mean concentration of 0.0561 mg/kg. The data appeared to follow a gamma distribution at the 5% significance level and the recommended 95% UCL of the mean for BaP-EQ was 0.0904 mg/kg.

This value does not exceed the R-SCTL of 0.1 mg/kg and indicates that remediation may not be warranted.

Arsenic 0-0.5 ft

The data set for this interval included a total of 25 results consisting of 17 detections and 8 non-detect values. The maximum detected value was 5.3 mg/kg, and the minimum detected value was 0.0022 mg/kg, with a mean concentration of 0.14 mg/kg. The data appeared lognormal distributed at the 5% significance level and the recommended 95% UCL of the mean for arsenic was 1.157 mg/kg. This value does not exceed the R-SCTL of 0.1 mg/kg and indicates that remediation may not be warranted in this interval.

Arsenic 0.5-2 ft

The data set for this interval included a total of 21 results consisting of 13 detections and 8 non-detect values. The maximum detected value was 2.2 mg/kg, and the minimum detected value was 0.13 mg/kg, 6 Recommendations

Project Number: 172608008 8 with a mean concentration of 0.648 mg/kg. The data appeared gamma distributed at the 5% significance level and the recommended 95% UCL of the mean for arsenic was 0.82 mg/kg. This value does not exceed the R-SCTL of 0.1 mg/kg and indicates that remediation may not be warranted in this interval.

The ProUCL calculation sheets are included as Appendix C.

6 Recommendations Based on the results of this Supplemental Phase II ESA,

• Stantec recommends limited additional soil sampling to define the extent of BaP-EQ impacts in the SB-7 20N 0-0.5 ft bls sample. This sampling can be conducted prior to the limited source removal, or the shallow removal action can be conducted, and confirmatory soil samples can be collected along the northern edge of the excavation to document complete removal to below applicable SCTLs for unrestricted land use.

• Stantec recommends no further evaluation of arsenic at the site.

• Based on conversations with the County, Stantec recommends limited shallow source removal of identified BaP-EQ impacts in the vicinity of SB-7, followed by preparation of a soil and debris management plan for use during construction in the event suspect soils or debris are encountered.

Project Number: 172608008 A-1

TABLES

Table 1 Soil Analytical Data Summary

Dansville Community Park Site

Analyte Units RES COM LGW

Arsenic mg/kg 2.1 12 N/A 0.13 U 1 0.62 0.42 0.72 2.2 0.59 0.61 0.62 0.34 0.62 0.46 0.84 0.38 Barium mg/kg 3000* 130000 1600 7 17 26 25 17 180 NA NA NA NA NA NA NA NA Cadmium mg/kg 71* 1700 7.5 0.44 0.54 0.47 0.5 0.38 0.43 NA NA NA NA NA NA NA NA Chromium mg/kg 210 470 38 3.9 7.3 5.6 4.9 4.2 13 NA NA NA NA NA NA NA NA Lead mg/kg 400 1400 N/A 60 82 33 46 32 61 NA NA NA NA NA NA NA NA Mercury mg/kg 3 17 2.1 0.029 0.052 0.066 0.096 0.062 0.11 NA NA NA NA NA NA NA NA Selenium mg/kg 440 11000 5.2 1 U 1.1 U 1.2 U 1.1 U 1.1 U 1.3 U NA NA NA NA NA NA NA NA Silver mg/kg 410 8200 17 0.21 U 0.22 U 0.23 U 0.23 U 0.22 U 0.25 U NA NA NA NA NA NA NA NA

1-Methylnaphthalene mg/kg 200 1800 3.1 0.0016 U 0.0082 U 0.0017 U 0.0033 U 0.0016 U 0.0018 U NA NA NA NA NA NA NA NA 2-Methylnaphthalene mg/kg 210 2100 8.5 0.0021 U 0.011 U 0.0023 U 0.0043 U 0.0021 U 0.0024 U NA NA NA NA NA NA NA NA Acenaphthene mg/kg 2400 20000 2.1 0.0015 U 0.0079 U 0.0017 U 0.0069 I 0.0037 I 0.0018 U NA NA NA NA NA NA NA NA Acenaphthylene mg/kg 1800 20000 27 0.0019 I 0.0094 U 0.0025 I 0.0071 I 0.0033 I 0.0074 I NA NA NA NA NA NA NA NA Anthracene mg/kg 21000 300000 2500 0.0049 I 0.013 U 0.0064 I 0.04 0.017 0.011 NA NA NA NA NA NA NA NA Benzo(a)anthracene mg/kg # # 0.8 0.018 0.017 I 0.025 0.089 0.04 0.015 NA NA NA NA NA NA NA NA Benzo(a)pyrene mg/kg 0.1 0.7 8 0.018 0.022 I 0.03 0.092 0.041 0.018 NA NA NA NA NA NA NA NA Benzo(b)fluoranthene mg/kg # # 2.4 0.028 0.029 I 0.044 0.13 0.062 0.025 NA NA NA NA NA NA NA NA Benzo(g,h,i)perylene mg/kg 2500 52000 32000 0.017 0.032 I 0.026 0.077 0.035 0.017 NA NA NA NA NA NA NA NA Benzo(k)fluoranthene mg/kg # # 24 0.011 0.012 U 0.017 0.05 0.022 0.0086 I NA NA NA NA NA NA NA NA Chrysene mg/kg # # 77 0.024 0.024 I 0.033 0.1 0.045 0.019 NA NA NA NA NA NA NA NA Dibenzo(a,h)anthracene mg/kg # # 0.7 0.0042 I 0.0088 U 0.0064 I 0.019 0.0088 0.0046 I NA NA NA NA NA NA NA NA Fluoranthene mg/kg 3200 59000 1200 0.042 0.028 I 0.058 0.23 0.093 0.021 NA NA NA NA NA NA NA NA Fluorene mg/kg 2600 33000 160 0.0022 U 0.011 U 0.0024 U 0.0069 I 0.0035 I 0.0025 U NA NA NA NA NA NA NA NA Indeno(1,2,3-cd)pyrene mg/kg # # 6.6 0.016 0.02 I 0.028 0.08 0.038 0.016 NA NA NA NA NA NA NA NA Naphthalene mg/kg 55 300 1.2 0.0017 U 0.0089 U 0.0019 U 0.0036 U 0.0018 U 0.002 U NA NA NA NA NA NA NA NA Phenanthrene mg/kg 2200 36000 250 0.011 0.011 U 0.017 0.1 0.041 0.0064 I NA NA NA NA NA NA NA NA Pyrene mg/kg 2400 45000 880 0.036 0.028 I 0.052 0.18 0.077 0.031 NA NA NA NA NA NA NA NA Total Benzo(a)pyrene Equivalents mg/kg 0.1 0.7 # 0.029 0.033 0.046 0.14 0.064 0.028 NA NA NA NA NA NA NA NA

Total Recoverable Petroleum Hydrocarbons (TRPH) mg/kg 460 2700 340 18 62 I 31 39 20 53 NA NA NA NA NA NA NA NA

Aldrin mg/kg 0.06 0.3 0.2 0.0052 U 0.0054 U 0.0056 U 0.0054 U 0.0053 U 0.0059 U NA NA NA NA NA NA NA NA alpha-BHC mg/kg 0.1 0.6 0.0003 0.0059 U 0.0061 U 0.0063 U 0.0061 U 0.006 U 0.0067 U NA NA NA NA NA NA NA NA beta-BHC mg/kg 0.5 2.4 0.001 0.004 U 0.0042 U 0.0043 U 0.0042 U 0.0041 U 0.0046 U NA NA NA NA NA NA NA NA Chlordane mg/kg 2.8 14 9.6 0.14 U 0.15 U 0.15 U 0.15 U 0.14 U 0.16 U NA NA NA NA NA NA NA NA delta-BHC mg/kg 24 490 0.2 0.0041 U 0.0043 U 0.0045 U 0.0043 U 0.0042 U 0.0047 U NA NA NA NA NA NA NA NA Dieldrin mg/kg 0.06 0.3 0.002 0.0044 U 0.0046 U 0.0048 U 0.0046 U 0.0045 U 0.0051 U NA NA NA NA NA NA NA NA Endrin mg/kg 25 510 1 0.0096 U 0.01 U 0.01 U 0.01 U 0.0098 U 0.011 U NA NA NA NA NA NA NA NA gamma-BHC (Lindane) mg/kg 0.7 2.5 0.009 0.0062 U 0.0064 U 0.0066 U 0.0064 U 0.0063 U 0.0071 U NA NA NA NA NA NA NA NA Heptachlor mg/kg 0.2 1 23 0.0065 U 0.0067 U 0.007 U 0.0068 U 0.0066 U 0.0074 U NA NA NA NA NA NA NA NA Heptachlor Epoxide mg/kg 0.1 0.5 0.6 0.0048 U 0.005 U 0.0051 U 0.005 U 0.0049 U 0.0055 U NA NA NA NA NA NA NA NA Methoxchlor mg/kg 420 8800 160 0.0071 U 0.0073 U 0.0076 U 0.0074 U 0.0072 U 0.0081 U NA NA NA NA NA NA NA NA p,p-DDD mg/kg 4.2 22 5.8 0.0057 U 0.0059 U 0.0061 U 0.0059 U 0.0058 U 0.0065 U NA NA NA NA NA NA NA NA p,p-DDE mg/kg 2.9 15 18 0.0044 U 0.0045 U 0.0047 U 0.0046 U 0.0044 U 0.005 U NA NA NA NA NA NA NA NA p,p-DDT mg/kg 2.9 15 11 0.0097 U 0.01 U 0.01 U 0.01 U 0.0098 U 0.011 U NA NA NA NA NA NA NA NA Toxaphene mg/kg 0.9 4.5 31 0.25 U 0.26 U 0.27 U 0.26 U 0.25 U 0.28 U NA NA NA NA NA NA NA NA Endosulfan (alpha+beta+sulfate) mg/kg 450 7600 3.8 0.0037 U 0.0039 U 0.004 U 0.0039 U 0.0038 U 0.0043 U NA NA NA NA NA NA NA NA Heptachlor (and its epoxide) mg/kg 0.1 0.5 0.6 0.0048 U 0.005 U 0.0051 U 0.005 U 0.0049 U 0.0055 U NA NA NA NA NA NA NA NA PCB, Total mg/kg 0.5 2.6 17 0.026 U 0.027 U 0.028 U 0.027 U 0.027 U 0.03 U NA NA NA NA NA NA NA NA Notes:

N/C = Not Calculated I = The reported value is between the laboratory limit of detection (MDL) and the laboratory limit of quantitation (PQL).

U = Indicates that a specific compound was analyzed for but not detected. The reported value shall be the MDL.

Bold = Bold results denote analyte was detected above the laboratory method detection limit.

SCTLs= Soil Cleanup Target Levels specified in Table II of Chapter 62-777, F.A.C. 4/17/2005

RES =

COM =

LGW =

4/11/20234/11/2023

SB-3-10W 0-0.5

4/11/2023 4/11/2023

SB-3-10S 0-0.5 SB-3-10S 0.5-2

4/11/2023 4/11/2023

Results are rounded for comparison to the CTL critiera as decribed in FDEP Memo 11/17/2011: Rounding Analytical Data for Site Rehabilitation Completion.

indicates concentration exceeds FDEP Soil Cleanup Target Level - Direct Exposure Residential indicates concentration exceeds FDEP Soil Cleanup Target Level - Direct Exposure Commercial/Industrial indicates concentration exceeds FDEP Soil Cleanup Target Level for Leachability Based on Groundwater

* SCTL adjusted based on April 2020 Center for Environmental and Human Toxicology, updated acute toxicity-based SCTLs.

SB-3 (0-0.5)SB-2 (0.5-2)

3/30/2022 4/11/2023 4/11/2023

SB-3-10N 0-0.5 SB-3-10N 0.5-2 SB-3-10W 0.5-2 SB-3-10E 0-0.5

3/30/2022

SB-1 (0-0.5)

3/30/2022 3/30/2022 3/30/2022

SB-2 (0-0.5)SB-1 (0.5-2)

3/30/2022

TRPH By FLO-PRO

PAHs by EPA 8270

Metals By EPA 6010/7471

Pesticides/PCBs by EPA 8081

SB-3 (0.5-2)

Dansville Community Park Site

Analyte Units RES COM LGW

Arsenic mg/kg 2.1 12 N/A Barium mg/kg 3000* 130000 1600 Cadmium mg/kg 71* 1700 7.5 Chromium mg/kg 210 470 38 Lead mg/kg 400 1400 N/A Mercury mg/kg 3 17 2.1 Selenium mg/kg 440 11000 5.2 Silver mg/kg 410 8200 17

1-Methylnaphthalene mg/kg 200 1800 3.1 2-Methylnaphthalene mg/kg 210 2100 8.5 Acenaphthene mg/kg 2400 20000 2.1 Acenaphthylene mg/kg 1800 20000 27 Anthracene mg/kg 21000 300000 2500 Benzo(a)anthracene mg/kg # # 0.8 Benzo(a)pyrene mg/kg 0.1 0.7 8 Benzo(b)fluoranthene mg/kg # # 2.4 Benzo(g,h,i)perylene mg/kg 2500 52000 32000 Benzo(k)fluoranthene mg/kg # # 24 Chrysene mg/kg # # 77 Dibenzo(a,h)anthracene mg/kg # # 0.7 Fluoranthene mg/kg 3200 59000 1200 Fluorene mg/kg 2600 33000 160 Indeno(1,2,3-cd)pyrene mg/kg # # 6.6 Naphthalene mg/kg 55 300 1.2 Phenanthrene mg/kg 2200 36000 250 Pyrene mg/kg 2400 45000 880 Total Benzo(a)pyrene Equivalents mg/kg 0.1 0.7 #

Total Recoverable Petroleum Hydrocarbons (TRPH) mg/kg 460 2700 340

Aldrin mg/kg 0.06 0.3 0.2 alpha-BHC mg/kg 0.1 0.6 0.0003 beta-BHC mg/kg 0.5 2.4 0.001 Chlordane mg/kg 2.8 14 9.6 delta-BHC mg/kg 24 490 0.2 Dieldrin mg/kg 0.06 0.3 0.002 Endrin mg/kg 25 510 1 gamma-BHC (Lindane) mg/kg 0.7 2.5 0.009 Heptachlor mg/kg 0.2 1 23 Heptachlor Epoxide mg/kg 0.1 0.5 0.6 Methoxchlor mg/kg 420 8800 160 p,p-DDD mg/kg 4.2 22 5.8 p,p-DDE mg/kg 2.9 15 18 p,p-DDT mg/kg 2.9 15 11 Toxaphene mg/kg 0.9 4.5 31 Endosulfan (alpha+beta+sulfate) mg/kg 450 7600 3.8 Heptachlor (and its epoxide) mg/kg 0.1 0.5 0.6 PCB, Total mg/kg 0.5 2.6 17 Notes:

N/C = Not Calculated I = The reported value is between the laboratory limit of detection (MDL) and the laboratory limit of quantitation (PQL).

U = Indicates that a specific compound was analyzed for but not detected. The reported value shall be the MDL.

Bold = Bold results denote analyte was detected above the laboratory method detection limit.

SCTLs= Soil Cleanup Target Levels specified in Table II of Chapter 62-777, F.A.C. 4/17/2005

RES =

COM =

LGW =

Results are rounded for comparison to the CTL critiera as decribed in FDEP Memo 11/17/2011: Rounding Analytical Data for Site Rehabilitation Completion.

indicates concentration exceeds FDEP Soil Cleanup Target Level - Direct Exposure Residential indicates concentration exceeds FDEP Soil Cleanup Target Level - Direct Exposure Commercial/Industrial indicates concentration exceeds FDEP Soil Cleanup Target Level for Leachability Based on Groundwater

* SCTL adjusted based on April 2020 Center for Environmental and Human Toxicology, updated acute toxicity-based SCTLs.

TRPH By FLO-PRO

PAHs by EPA 8270

Metals By EPA 6010/7471

Pesticides/PCBs by EPA 8081

0.6 0.13 U 0.13 U 0.15 I 1.1 0.13 U 0.13 U 5.3 0.63 0.45 3.3 1.8

NA 1.8 6.4 3.1 52 2.6 1.9 96 NA 8.5 NA NA

NA 0.026 U 0.026 U 0.056 0.94 0.045 I 0.027 U 2.4 NA 0.085 NA NA

NA 2.4 0.21 U 3.3 7.4 3.5 2.9 13 NA 1.2 NA NA

NA 1.8 0.76 3.3 63 4.4 1.7 130 NA 7.6 NA NA

NA 0.024 0.0045 I 0.044 0.08 0.034 0.035 0.11 NA 0.023 NA NA

NA 1 U 1 U 1 U 1.1 U 1 U 1.1 U 1.1 U NA 1.1 U NA NA

NA 0.21 U 0.21 U 0.2 U 0.23 U 0.21 U 0.21 U 0.22 U NA 0.22 U NA NA

NA 0.0016 U 0.0016 U 0.0016 U 0.016 U 0.0016 U 0.0016 U 0.041 U 0.0028 U 0.0016 U 0.03 U 0.003 U NA 0.002 U 0.002 U 0.002 U 0.021 U 0.0021 U 0.0021 U 0.053 U 0.0028 U 0.0021 U 0.03 U 0.003 U NA 0.0015 U 0.0015 U 0.0015 U 0.016 U 0.0016 U 0.0016 U 0.039 U 0.0024 U 0.0016 U 0.025 U 0.0025 U NA 0.0018 U 0.0018 U 0.0018 U 0.019 U 0.0019 U 0.0019 U 0.046 U 0.0023 U 0.0018 U 0.024 U 0.0024 U NA 0.0025 U 0.0025 U 0.0025 U 0.026 U 0.0026 U 0.0026 U 0.065 U 0.0037 I 0.0026 U 0.021 U 0.0094 NA 0.002 U 0.0027 I 0.002 U 0.026 I 0.0021 U 0.0021 U 0.29 0.021 0.0021 U 0.14 0.091 NA 0.0017 U 0.0029 I 0.0017 U 0.037 I 0.0018 I 0.0017 U 0.33 0.024 0.0017 U 0.13 0.08 NA 0.0016 U 0.0047 I 0.0016 U 0.05 I 0.003 I 0.0016 U 0.44 0.039 0.0023 I 0.17 0.11 NA 0.0019 U 0.0025 I 0.0019 U 0.053 I 0.002 U 0.002 U 0.25 0.027 0.002 U 0.11 0.069 NA 0.0024 U 0.0024 U 0.0024 U 0.025 U 0.0025 U 0.0025 U 0.16 I 0.013 0.0024 U 0.069 I 0.04 NA 0.0029 U 0.0034 I 0.0029 U 0.031 U 0.0031 U 0.0031 U 0.33 0.031 0.003 U 0.16 0.11 NA 0.0017 U 0.0017 U 0.0017 U 0.017 U 0.0017 U 0.0017 U 0.059 I 0.0062 U 0.0017 U 0.065 U 0.016 NA 0.0028 U 0.0047 I 0.0028 U 0.037 I 0.0029 U 0.0029 U 0.81 0.033 0.0029 U 0.11 0.16 NA 0.0022 U 0.0022 U 0.0022 U 0.022 U 0.0022 U 0.0022 U 0.056 U 0.0025 U 0.0022 U 0.026 U 0.0026 U NA 0.0024 U 0.003 I 0.0024 U 0.033 I 0.0025 U 0.0025 U 0.25 0.025 0.0025 U 0.1 0.067 NA 0.0017 U 0.0017 U 0.0017 U 0.018 U 0.0018 U 0.0018 U 0.044 U 0.0051 U 0.0018 U 0.053 U 0.0053 U NA 0.0022 U 0.0022 U 0.0022 U 0.022 U 0.0022 U 0.0022 U 0.43 0.002 U 0.0022 U 0.021 U 0.028 NA 0.0024 U 0.0038 I 0.0023 U 0.037 I 0.0024 U 0.0024 U 0.64 0.039 0.0024 U 0.2 0.14

NA N/C 0.0048 N/C 0.057 0.0032 N/C 0.49 0.036 0.0022 0.2 0.12

NA 7.4 I 7.7 I 5.1 I 65 I 5.2 U 10 I 160 NA 11 I NA NA

NA 0.0051 U 0.0051 U 0.0051 U 0.026 U 0.0052 U 0.0053 U 0.026 U NA 0.005 U NA NA

NA 0.0058 U 0.0058 U 0.0058 U 0.03 U 0.0059 U 0.006 U 0.029 U NA 0.0057 U NA NA

NA 0.004 U 0.004 U 0.004 U 0.02 U 0.004 U 0.0041 U 0.02 U NA 0.0039 U NA NA

NA 0.14 U 0.14 U 0.14 U 0.72 U 0.14 U 0.14 U 0.7 U NA 0.14 U NA NA

NA 0.0041 U 0.0041 U 0.0041 U 0.021 U 0.0042 U 0.0042 U 0.02 U NA 0.004 U NA NA

NA 0.0044 U 0.0044 U 0.0044 U 0.023 U 0.0045 U 0.0045 U 0.022 U NA 0.0043 U NA NA NA 0.0095 U 0.0095 U 0.0095 U 0.049 U 0.0097 U 0.0098 U 0.048 U NA 0.0093 U NA NA

NA 0.0061 U 0.0061 U 0.0061 U 0.031 U 0.0062 U 0.0063 U 0.031 U NA 0.006 U NA NA

NA 0.0064 U 0.0064 U 0.0064 U 0.033 U 0.0065 U 0.0066 U 0.032 U NA 0.0063 U NA NA NA 0.0047 U 0.0047 U 0.0047 U 0.024 U 0.0048 U 0.0049 U 0.024 U NA 0.0046 U NA NA

NA 0.007 U 0.007 U 0.007 U 0.036 U 0.0071 U 0.0072 U 0.035 U NA 0.0068 U NA NA

NA 0.0056 U 0.0056 U 0.0056 U 0.029 U 0.0057 U 0.0058 U 0.028 U NA 0.0055 U NA NA NA 0.0043 U 0.0043 U 0.0043 U 0.022 U 0.0044 U 0.0045 U 0.022 U NA 0.0042 U NA NA NA 0.0095 U 0.0096 U 0.0096 U 0.049 U 0.0097 U 0.0099 U 0.048 U NA 0.0094 U NA NA

NA 0.24 U 0.24 U 0.24 U 1.3 U 0.25 U 0.25 U 1.2 U NA 0.24 U NA NA

NA 0.0037 U 0.0037 U 0.0037 U 0.019 U 0.0038 U 0.0038 U 0.018 U NA 0.0036 U NA NA NA 0.0047 U 0.0047 U 0.0047 U 0.024 U 0.0048 U 0.0049 U 0.024 U NA 0.0046 U NA NA

NA 0.026 U 0.026 U 0.026 U 0.027 U 0.026 U 0.027 U 0.026 U NA 0.025 U NA NA

4/11/2023 3/30/20223/30/2022 3/30/2022

SB-4 (0.5-2) SB-5 (0.5-2)SB-5 (0-0.5)SB-3-10E 0.5-2 SB-7 (0-0.5)

3/30/2022

SB-7 (0.5-2)

3/30/2022

SB-6 (0.5-2)SB-4 (0-0.5)

3/30/2022

SB-6 (0-0.5)

3/30/2022 3/30/2022

SB-7-10N 0-0.5 SB-7-10N 0.5-2

4/12/2023 4/12/2023 4/12/2023

Dansville Community Park Site

Analyte Units RES COM LGW

Arsenic mg/kg 2.1 12 N/A Barium mg/kg 3000* 130000 1600 Cadmium mg/kg 71* 1700 7.5 Chromium mg/kg 210 470 38 Lead mg/kg 400 1400 N/A Mercury mg/kg 3 17 2.1 Selenium mg/kg 440 11000 5.2 Silver mg/kg 410 8200 17

1-Methylnaphthalene mg/kg 200 1800 3.1 2-Methylnaphthalene mg/kg 210 2100 8.5 Acenaphthene mg/kg 2400 20000 2.1 Acenaphthylene mg/kg 1800 20000 27 Anthracene mg/kg 21000 300000 2500 Benzo(a)anthracene mg/kg # # 0.8 Benzo(a)pyrene mg/kg 0.1 0.7 8 Benzo(b)fluoranthene mg/kg # # 2.4 Benzo(g,h,i)perylene mg/kg 2500 52000 32000 Benzo(k)fluoranthene mg/kg # # 24 Chrysene mg/kg # # 77 Dibenzo(a,h)anthracene mg/kg # # 0.7 Fluoranthene mg/kg 3200 59000 1200 Fluorene mg/kg 2600 33000 160 Indeno(1,2,3-cd)pyrene mg/kg # # 6.6 Naphthalene mg/kg 55 300 1.2 Phenanthrene mg/kg 2200 36000 250 Pyrene mg/kg 2400 45000 880 Total Benzo(a)pyrene Equivalents mg/kg 0.1 0.7 #

Total Recoverable Petroleum Hydrocarbons (TRPH) mg/kg 460 2700 340

Aldrin mg/kg 0.06 0.3 0.2 alpha-BHC mg/kg 0.1 0.6 0.0003 beta-BHC mg/kg 0.5 2.4 0.001 Chlordane mg/kg 2.8 14 9.6 delta-BHC mg/kg 24 490 0.2 Dieldrin mg/kg 0.06 0.3 0.002 Endrin mg/kg 25 510 1 gamma-BHC (Lindane) mg/kg 0.7 2.5 0.009 Heptachlor mg/kg 0.2 1 23 Heptachlor Epoxide mg/kg 0.1 0.5 0.6 Methoxchlor mg/kg 420 8800 160 p,p-DDD mg/kg 4.2 22 5.8 p,p-DDE mg/kg 2.9 15 18 p,p-DDT mg/kg 2.9 15 11 Toxaphene mg/kg 0.9 4.5 31 Endosulfan (alpha+beta+sulfate) mg/kg 450 7600 3.8 Heptachlor (and its epoxide) mg/kg 0.1 0.5 0.6 PCB, Total mg/kg 0.5 2.6 17 Notes:

N/C = Not Calculated I = The reported value is between the laboratory limit of detection (MDL) and the laboratory limit of quantitation (PQL).

U = Indicates that a specific compound was analyzed for but not detected. The reported value shall be the MDL.

Bold = Bold results denote analyte was detected above the laboratory method detection limit.

SCTLs= Soil Cleanup Target Levels specified in Table II of Chapter 62-777, F.A.C. 4/17/2005

RES =

COM =

LGW =

Results are rounded for comparison to the CTL critiera as decribed in FDEP Memo 11/17/2011: Rounding Analytical Data for Site Rehabilitation Completion.

indicates concentration exceeds FDEP Soil Cleanup Target Level - Direct Exposure Residential indicates concentration exceeds FDEP Soil Cleanup Target Level - Direct Exposure Commercial/Industrial indicates concentration exceeds FDEP Soil Cleanup Target Level for Leachability Based on Groundwater

* SCTL adjusted based on April 2020 Center for Environmental and Human Toxicology, updated acute toxicity-based SCTLs.

TRPH By FLO-PRO

PAHs by EPA 8270

Metals By EPA 6010/7471

Pesticides/PCBs by EPA 8081

1.5 NA 1.2 NA NA 0.14 I 0.4 0.13 U 0.22 I 0.13 U 0.13 U 0.13 U

NA NA NA NA NA NA NA 8.8 22 0.22 I 0.13 U 0.13 U

NA NA NA NA NA NA NA 0.24 0.2 0.026 U 0.026 U 0.026 U

NA NA NA NA NA NA NA 2.2 1.3 0.21 U 0.2 U 0.21 U

NA NA NA NA NA NA NA 17 12 0.19 I 0.13 U 0.13 U

NA NA NA NA NA NA NA 0.032 0.022 0.0092 0.016 0.0032 U

NA NA NA NA NA NA NA 1.1 U 1 U 1.1 U 1 U 1 U

NA NA NA NA NA NA NA 0.21 U 0.21 U 0.21 U 0.2 U 0.21 U

0.0029 U 0.0029 U 0.03 U 0.0029 U 0.029 U 0.0029 U 0.0028 U 0.0016 U 0.0016 U 0.0015 U 0.0015 U 0.0015 U

0.0029 U 0.0029 U 0.03 U 0.0029 U 0.029 U 0.0029 U 0.0028 U 0.0021 U 0.002 U 0.002 U 0.002 U 0.002 U

0.014 0.0025 U 0.025 U 0.0025 U 0.025 U 0.0024 U 0.0024 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U 0.0015 U

0.0034 I 0.0024 U 0.024 U 0.0024 U 0.023 U 0.0023 U 0.0023 U 0.0018 U 0.0018 U 0.0017 U 0.0018 U 0.0017 U

0.084 0.0021 U 0.021 U 0.0021 U 0.024 I 0.0046 I 0.011 0.0026 U 0.0025 U 0.0024 U 0.0025 U 0.0025 U

0.49 0.0063 I 0.14 0.013 0.054 I 0.021 0.034 0.011 0.0043 I 0.0019 U 0.002 U 0.002 U

0.37 0.0059 I 0.12 0.013 0.065 I 0.022 0.036 0.016 0.006 I 0.0016 U 0.0017 U 0.0016 U

0.45 0.008 0.17 0.018 0.071 0.031 0.052 0.025 0.0082 I 0.0015 U 0.0016 U 0.0015 U

0.25 0.0056 U 0.086 0.015 0.082 0.02 0.034 0.016 0.0067 I 0.0019 U 0.0019 U 0.0019 U

0.18 0.0037 I 0.066 I 0.0069 I 0.031 I 0.011 0.02 0.0084 I 0.0029 I 0.0023 U 0.0023 U 0.0023 U

0.5 0.0077 I 0.16 0.016 0.068 I 0.027 0.042 0.016 0.0055 I 0.0028 U 0.0029 U 0.0029 U

0.068 0.0064 U 0.065 U 0.0064 U 0.063 U 0.0063 U 0.0076 I 0.0042 I 0.0017 U 0.0016 U 0.0016 U 0.0016 U

0.97 0.002 U 0.12 0.0065 I 0.02 U 0.034 0.043 0.022 0.0061 I 0.0027 U 0.0028 U 0.0027 U

0.01 0.0025 U 0.026 U 0.0025 U 0.025 U 0.0025 U 0.0024 U 0.0022 U 0.0022 U 0.0021 U 0.0021 U 0.0021 U

0.29 0.0053 I 0.093 0.011 0.062 I 0.02 0.034 0.015 0.0054 I 0.0023 U 0.0023 U 0.0023 U

0.0052 U 0.0052 U 0.053 U 0.0052 U 0.051 U 0.0051 U 0.005 U 0.0017 U 0.0017 U 0.0016 U 0.0017 U 0.0017 U

0.32 0.002 U 0.021 U 0.002 U 0.02 U 0.0024 I 0.002 U 0.0097 0.0028 I 0.0021 U 0.0021 U 0.0021 U

0.74 0.01 0.2 0.017 0.085 0.038 0.048 0.019 0.0071 I 0.0023 U 0.0023 U 0.0023 U

0.56 0.011 0.19 0.02 0.12 0.032 0.056 0.025 0.0087 N/C N/C N/C

NA NA NA NA NA NA NA 21 11 I 5.4 I 4.9 U 4.8 U

NA NA NA NA NA NA NA 0.0051 U 0.0048 U 0.0048 U 0.0049 U 0.0048 U

NA NA NA NA NA NA NA 0.0058 U 0.0054 U 0.0054 U 0.0056 U 0.0054 U

NA NA NA NA NA NA NA 0.004 U 0.0037 U 0.0037 U 0.0038 U 0.0037 U

NA NA NA NA NA NA NA 0.14 U 0.13 U 0.13 U 0.13 U 0.13 U

NA NA NA NA NA NA NA 0.0041 U 0.0038 U 0.0038 U 0.0039 U 0.0038 U

NA NA NA NA NA NA NA 0.0044 U 0.0041 U 0.0041 U 0.0042 U 0.0041 U

NA NA NA NA NA NA NA 0.0095 U 0.0089 U 0.0088 U 0.0091 U 0.0088 U

NA NA NA NA NA NA NA 0.0061 U 0.0057 U 0.0057 U…