Funding Information:

Org. Code E.O. Object Code Budget Entity Appropriation

Category Grant # Project # Year Amount

☐ Additional Funding Information attached on separate page.

Rev. 8/26/2020

STATE OF FLORIDA

DEPARTMENT OF ENVIRONMENTAL PROTECTION

Task Assignment This Task Assignment (TA) is entered into between the Parties named below, pursuant to Contract Number: .

1. TA Number: TA Completion Date:

TA Description:

2. Parties State of Florida Department of Environmental Protection

(Department)

Department Project Manager: Department Project Manager Phone:

Contractor Name: (Contractor ) ntractor’st ’s Project Manager: ontractor’s t’s Project Manager Phone:

3. Project Number:

(If different from TA Number)

Project Location(s):

Project Name:

4. As consideration for the services rendered by Contractor under the terms of this TA, the Department shall pay the Contractor on the following bases, up to the Total TA Value as indicated below:

☐ Fixed Price:

☐ Fixed Unit Rate: (Extended Price)

☐ Cost Reimbursement:

Total TA Value:

5. The Parties agree to comply with the terms and conditions of the underlying the Contract, and the following attachments which are hereby incorporated by reference:

Attachment 1:

☐ Additional Attachments (if necessary):

IN WITNESS WHEREOF, this TA shall be effective on the last date signed below.

State of Florida Department of Environmental Protection CONTRACTOR Department Name:

Title:

Secretary or Designee

(Authorized Signature) (Authorized Signature) Date:

☐ Additional signatures attached on separate page.

HW683

DC005B Completion August 26, 2023

This Task Assignment authorizes Geosyntec to conduct post active remediation monitoring (PARM) at the Walker Plaza site in accordance with the Geosyntec scope of work, cost estimate, and schedule received on 31 May 2022.

Evan Miller 850-245-8928 Contractor Contractor

Contractor Contractor

Contractor Contractor

Contractor

Geosyntec

Geosyntec

James Mills 813-379-4389

ERIC_4783

603 – 617 North Maryland Avenue Plant City, Florida

Walker Plaza

✔ $ 19,182.77

$ 19,182.77

Scope of Work

Todd Kafka

Contract Manager

Todd Kafka, P.G. Digitally signed by Todd Kafka, P.G.

Date: 2022.06.01 09:36:45 -04'00'

William E. Burns, Jr.

William E. Burns, Jr. Digitally signed by William E. Burns, Jr.

Date: 2022.06.01 07:27:18 -04'00'

N/A

Task Assignment Notification/Change Order Deliverables and Invoice Schedule Attachment

WCP TAFORM 04-2017

Contract Number:

Task Assignment #:

Deliverables:

Deliverable Deliverable Due Date

Invoice Schedule:

Requirements for Invoice Submittal Amount to be Invoiced

TOTAL COST

Subtask 2- Submittal of Q2 field deliverable, ADaPT files, and GIS data tables 09/30/2022

Subtask 3- Submittal of Q3 field deliverable, ADaPT files, and GIS data tables 12/30/2022

Subtask 4- Submittal of Q4 field deliverable, ADaPT files, and GIS data tables 03/31/2023

Subtask 5- Submittal of PARM Report 04/28/2023

Subtask 1,6- Submittal of Final IDW manifest; Project Management 05/26/2023

Subtask 2- FDEP receipt and approval of Q2 field deliverable, ADaPT files, and GIS data tables $ 4,628.18

Subtask 3- FDEP receipt and approval of Q3 field deliverable, ADaPT files, and GIS data tables $ 4,628.18

Subtask 4- FDEP receipt and approval of Q4 field deliverable, ADaPT files, and GIS data tables $ 4,698.18

Subtask 5- FDEP receipt and approval of PARM Report $ 3,218.68

Subtask 1,6- FDEP receipt and approval of Final IDW manifest; Project Management $ 2,009.55

$ 19,182.77

HW683

DC005B

Printed on recycled paper.

FLORIDA DEPARTMENT OF

Environmental Protection

Bob Martinez Center

2600 Blair Stone Road Tallahassee, FL 32399-2400

Ron DeSantis Governor

Jeanette Nuñez

Lt. Governor

Shawn Hamilton Secretary

To: HW683 Contract Negotiation File Walker Plaza Plant City, Hillsborough

ERIC_4783

From: Evan Miller, Project Manager Date: May 31, 2022 Subject: Negotiation Summary

HW683 DC005B

This Task Assignment authorizes Geosyntec to conduct post active remediation monitoring (PARM) at the Walker Plaza site.

Subtask 1: Project Management An automatic calculation based upon total direct labor hours determines the labor hours within this subtask.

Subtask 2 – Quarter 2 PARM Sampling (June – August 2022) Geosyntec will conduct one quarterly groundwater sampling event as outlined above, prepare and update the FDEP GIS Data Tables/ADaPT files electronically, and submit one field deliverable to the FDEP with groundwater sampling forms, laboratory analytical results, updated groundwater analytical results and DTW tables, and a Site Map figure.

Subtask 3 – Quarter 3 PARM Sampling (September – November 2022) Geosyntec will conduct one quarterly groundwater sampling event as outlined above, prepare and update the FDEP GIS Data Tables/ADaPT files electronically, and submit one field deliverable to the FDEP with groundwater sampling forms, laboratory analytical results, updated groundwater analytical results and DTW tables, and a Site Map figure.

Subtask 4 – Quarter 4 PARM Sampling (December 2022 – February 2023) Geosyntec will conduct one quarterly groundwater sampling event as outlined above, collect one IDW sample, prepare and update the FDEP GIS Data Tables/ADaPT files electronically, and submit one field deliverable to the FDEP with groundwater sampling forms, laboratory analytical results, updated groundwater analytical results and DTW tables, and a Site Map figure.

Subtask 5 – PARM Report Approximately 60 days after receipt of the final quarter (i.e., Quarter 4) of groundwater analytical results, Geosyntec will submit one PARM Report that will be signed and sealed by a licensed Florida engineer or geologist and include analytical results, field forms, and updated tables and figures summarizing the four quarterly sampling events. The field forms will consist of groundwater sampling, calibration, DTW, and drum logs generated during quarterly sampling

MEMORANDUM

Walker Plaza May 31, 2022 Page Two activities. The tables will include (i) DTW measurements, (ii) groundwater analytical results for VOHs, and (iii) geochemical field parameters. The figures will include (i) Site location Plan, (ii) Site map, (iii) groundwater elevation contours in the surficial aquifer, (iv) groundwater elevation contours in the intermediate aquifer, (v) groundwater analytical results in the surficial aquifer, and (vi) groundwater analytical results in the intermediate aquifer.

Subtask 6 - IDW Management This subtask includes generation and management of groundwater investigation-derived waste (IDW), which is estimated to include one drum. IDW will be staged inside the gated enclosure containing the SVE skid at the Site. Universal Environmental Solutions, LLC. is the lowest cost provider of transportation and disposal services per drum. Geosyntec will review the generation of a waste characterization profile as well as prepare the IDW manifest.

The FDEP Project Manager agrees to the scope of work and final cost associated with this Task Assignment. The final cost for this Task Assignment is $19,182.77 with 139 labor hours.

Geosyntec may invoice following the schedule established in the Deliverables and Invoice Schedule Attachment, which accompanies the Task Assignment Notification Form.

FDEP COST ESTIMATEContractor: Geosyntec Consultants

Date: 5/31/2022

Task #: DC005B SubTask 1 Project Management SubTask 6 IDW Management

Site: Walker Plaza SubTask 2 PARM Sampling (Jun - Aug 22) SubTask 7

Activity/Phase: PARM Sampling SubTask 3 PARM Sampling (Sept - Nov 22) SubTask 8

Project Manager: James Mills SubTask 4 PARM Sampling (Dec 22 - Feb 23) SubTask 9

SubTask 5 PARM Report SubTask 10

Totals 1 2 3 4 5 6 7 8 9 10 Labor Rate Category

$39.42 Project Manager J. Mills 14 14.0 $68.75 Principal T. Kafka 2 0 0 0 2 0 0 0 0 0 $46.15 Project Professional M. Hensley 6 0 0 0 6 0 0 0 0 0 $39.42 Professional J. Mills 35 6 6 6 16 1 0 0 0 0 $32.21 Senior Staff Professional A. Langteau 15 5 5 5 0 0 0 0 0 0 $29.33 Staff Professional A. Lamore 66 22 22 22 0 0 0 0 0 0 $27.88 Administrative Assistant A. Acosta 1 0 0 0 1 0 0 0 0 0

Total Hours 139 14 33 33 33 25 1 0 0 0 0

Direct Labor $4,792.23 $551.32 $1,042.83 $1,042.83 $1,042.83 $1,073.00 $39.42 $0.00 $0.00 $0.00 $0.00

Overhead 172.70% $8,276.19 $952.13 $1,800.97 $1,800.97 $1,800.97 $1,853.07 $68.08 $0.00 $0.00 $0.00 $0.00 Gen & Admin 0.00% $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Fringe 0.00% $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Labor $13,068.42 $1,503.45 $2,843.80 $2,843.80 $2,843.80 $2,926.07 $107.50 $0.00 $0.00 $0.00 $0.00

Travel Vehicle Rental $720.00 $240.00 $240.00 $240.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Mileage Costs $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Air Fare $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Per diem + Hotel $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Travel $720.00 $240.00 $240.00 $240.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

Subcontractor (Equipment Procurement) $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

$0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

Subcontractor Subtotal $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Procurement Fee $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Subcontractor Cost $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

Subcontractor (Services Procurement) Drilling (Conventional) $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Drilling (Non-conventional) $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Mobile Laboratory $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Surveying $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

IDW $125.00 $0.00 $0.00 $0.00 $0.00 $125.00 $0.00 $0.00 $0.00 $0.00

Utilities $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

$0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

Subcontractor Subtotal $125.00 $0.00 $0.00 $0.00 $0.00 $125.00 $0.00 $0.00 $0.00 $0.00 Handling Fee $12.50 $0.00 $0.00 $0.00 $0.00 $12.50 $0.00 $0.00 $0.00 $0.00 Total Subcontractor Cost $137.50 $0.00 $0.00 $0.00 $0.00 $137.50 $0.00 $0.00 $0.00 $0.00

Laboratory Analytical Costs $1,540.00 $490.00 $490.00 $560.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Fast Turnaround Charges $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Sample Shipping $330.00 $110.00 $110.00 $110.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Laboratory $1,870.00 $600.00 $600.00 $670.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

Field Expenses Personal Protection $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Expendables $240.00 $80.00 $80.00 $80.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Equipment (Drilling related) $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Equipment (Analytical related) $1,740.00 $580.00 $580.00 $580.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Equipment (IDW related) $100.00 $0.00 $0.00 $0.00 $0.00 $100.00 $0.00 $0.00 $0.00 $0.00 Equipment (Other) $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Field Expenses $2,080.00 $660.00 $660.00 $660.00 $0.00 $100.00 $0.00 $0.00 $0.00 $0.00

Subtotal $17,875.92 $1,503.45 $4,343.80 $4,343.80 $4,413.80 $2,926.07 $345.00 $0.00 $0.00 $0.00 $0.00 Completion Fee $1,306.85 $150.35 $284.38 $284.38 $284.38 $292.61 $10.75 $0.00 $0.00 $0.00 $0.00

Total Estimated Cost $19,182.77 $1,653.80 $4,628.18 $4,628.18 $4,698.18 $3,218.68 $355.75 $0.00 $0.00 $0.00 $0.00

ST 1 & 6 $2,009.55

REV: 02/03 CEF ARCADIS Page 1

LEVEL OF EFFORT/EXPENSE WORKSHEET

SITE : Walker Plaza SUBTASK: PARM Sampling (Jun - Aug 22)

DATE: 5/31/2022

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 6

Senior Staff Professional A. Langteau 5

Staff Professional A. Lamore

TOTAL LABOR 33

VEHICLE TYPE RATE UNIT USEAGE

Truck $120.00 Day 2 $240.00 Subtotal $240.00

TOTAL VEHICLE $240.00

LABORATORY COSTS

PARAMETER RATE # SAMPLES #QAQC

VOCs 7 wells $70.00 7 $490.00

Subtotal $490.00 Shipping

Small Cooler (0 to 25 lbs) $110.00 1 $110.00 Subtotal $110.00

TOTAL LAB $600.00

EQUIPMENT ITEM RATE COSTING UNIT USEAGE TOTALS

Analytical Related

Groundwater Sampling Kit $290.00 Day 2 $580.00 Subtotal $580.00

Expendables $40.00 Day 2 $80.00

Subtotal $80.00

TOTAL EQUIPMENT $660.00

RPO coordination and logistics to access interior wells (2 hr); Update data tables and prepare field package (4 hr)

ADaPT & GIS table updates (19 water levels, 8 samples = 27 data points @ 8 min/point = ~4 hr); GIS data table checker and submittal (1 hr)

Field preparation (2 hr); mobe/demob (2 d @ 2hr/d = 4 hr); collect 12 water levels from MWs not sampled (2 hr); sample 7 monitoring wells (7 @ 1.5 hr/well = 11 hr); equipment calibration (2 d @ 0.5 hr/d = 1 hr); IDW management (1 hr); sample management (1 hr)

FINAL --7/24/96

SUBTASK: PARM Sampling (Sept - Nov 22)

DATE: 5/31/2022

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 6

Senior Staff Professional A. Langteau 5

Staff Professional A. Lamore

TOTAL LABOR 33

VEHICLE TYPE RATE UNIT USEAGE

Truck $120.00 Day 2 $240.00 Subtotal $240.00

TOTAL VEHICLE $240.00

LABORATORY COSTS

PARAMETER RATE # SAMPLES #QAQC

VOCs 7 wells $70.00 7 $490.00

Subtotal $490.00 Shipping

Small Cooler (0 to 25 lbs) $110.00 1 $110.00 Subtotal $110.00

TOTAL LAB $600.00

EQUIPMENT ITEM RATE COSTING UNIT USEAGE TOTALS

Analytical Related

Groundwater Sampling Kit $290.00 Day 2 $580.00 Subtotal $580.00

Expendables $40.00 Day 2 $80.00

Subtotal $80.00

TOTAL EQUIPMENT $660.00

RPO coordination and logistics to access interior wells (2 hr); Update data tables and prepare field package (4 hr)

ADaPT & GIS table updates (19 water levels, 8 samples = 27 data points @ 8 min/point = ~4 hr); GIS data table checker and submittal (1 hr)

Field preparation (2 hr); mobe/demob (2 d @ 2hr/d = 4 hr); collect 12 water levels from MWs not sampled (2 hr); sample 7 monitoring wells (7 @ 1.5 hr/well = 11 hr); equipment calibration (2 d @ 0.5 hr/d = 1 hr); IDW management (1 hr); sample management (1 hr)

SUBTASK: PARM Sampling (Dec 22 - Feb 23)

DATE: 5/31/2022

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 6

Senior Staff Professional A. Langteau 5

Staff Professional A. Lamore

TOTAL LABOR 33

VEHICLE TYPE RATE UNIT USEAGE

Truck $120.00 Day 2 $240.00 Subtotal $240.00

TOTAL VEHICLE $240.00

LABORATORY COSTS

PARAMETER RATE # SAMPLES #QAQC

VOCs 7 wells, 1 IDW $70.00 8 $560.00

Subtotal $560.00 Shipping

Small Cooler (0 to 25 lbs) $110.00 1 $110.00 Subtotal $110.00

TOTAL LAB $670.00

EQUIPMENT ITEM RATE COSTING UNIT USEAGE TOTALS

Analytical Related

Groundwater Sampling Kit $290.00 Day 2 $580.00 Subtotal $580.00

Expendables $40.00 Day 2 $80.00

Subtotal $80.00

TOTAL EQUIPMENT $660.00

RPO coordination and logistics to access interior wells (2 hr); Update data tables and prepare field package (4 hr)

ADaPT & GIS table updates (19 water levels, 8 samples = 27 data points @ 8 min/point = ~4 hr); GIS data table checker and submittal (1 hr)

Field preparation (2 hr); mobe/demob (2 d @ 2hr/d = 4 hr); collect 12 water levels from MWs not sampled (2 hr); sample 7 monitoring wells (7 @ 1.5 hr/well = 11 hr); equipment calibration (2 d @ 0.5 hr/d = 1 hr); IDW management (1 hr); sample management (1 hr)

SUBTASK: PARM Report

DATE: 5/31/2022

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Principal T. Kafka 2

Project Professional M. Hensley 6

Professional J. Mills 16

Administrative Assistant A. Acosta 1

TOTAL LABOR 25

Report assembly and PDF compilation (1 hr)

Data evaluation/interpretation and PG certification on report (2 hr)

Prepare 6 report figures (6 hr)

Prepare annual groundwater monitoring report (16 hr)

SUBTASK: IDW Management

DATE: 5/31/2022

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 1

TOTAL LABOR 1

SUBCONTRACTOR COSTS

NAME PURPOSE COST

IDW

T&D - UES 1 drum $125.00 $125.00

Subtotal $125.00

TOTAL SUB $125.00

EQUIPMENT ITEM RATE COSTING UNIT USEAGE TOTALS

IDW Related

Drum $100.00 Each 1 $100.00 Subtotal $100.00

TOTAL EQUIPMENT $100.00

Prepare IDW manifest (1 hr)

12802 Tampa Oaks Blvd, Suite 151 Tampa, Florida 33637

PH 813.558.0990

FAX 813.558.9726

www.geosyntec.com

FR8633/Walker Plaza (ERIC_4783)_SOW_PARM Sampling_May 22_final

31 May 2022

Mr. Evan Miller Florida Department of Environmental Protection Waste Cleanup Program 2600 Blair Stone Road Tallahassee, FL 32399-2400

Subject: SOW/LOE – Post Active Remediation Monitoring Walker Plaza (ERIC_4783) 603 – 617 North Maryland Avenue Plant City, Florida

Dear Mr. Miller:

Geosyntec Consultants, Inc. (Geosyntec) has prepared the following scope of work (SOW) and proposed level of effort (LOE) to perform post active remediation monitoring (PARM) at the Walker Plaza site (herein, the “Site”) located in Plant City, Florida. The objective of this SOW is to collect three quarters of groundwater samples from seven existing monitoring wells to evaluate the effectiveness of soil vapor extraction (SVE) remediation activities conducted on-Site pursuant to Chapter 62-780.750, Florida Administrative Code on groundwater concentrations of volatile organic halocarbons (VOHs). Based on comments from the Florida Department of Environmental Protection (FDEP) memorandum, dated 20 April 2022 and addressing the Annual Groundwater Monitoring Report, it is assumed that the groundwater sampling event conducted in March 2022 will serve as the first of four quarters (i.e., Quarter 1) of PARM.

SOW ELEMENTS

Geosyntec will collect three quarters (groundwater sampling event from March 2022 will serve as Quarter 1) of groundwater samples from two on-Site monitoring wells (i.e., MW002 and MW006) and five off-Site monitoring wells (i.e., MW010 to MW012, MW013, and MW016). The rationale for the locations (see Figure 2 and Figure 3) is as follows:

MW002 (2.8-12.8 ft) Source area on-Site, PCE above GCTL MW012 (65-75 ft) cDCE detection, off-Site

MW006 (0.7-10.7ft) Source area on-Site, historical PCE impacts MW013 (3-13 ft) No VOH impacts, off-Site downgradient property line

MW010 (3-13 ft) PCE above GCTL, off-Site MW016 (3-13 ft) TCE above GCTL, off-Site downgradient property line

MW011 (27-32 ft) PCE and TCE above GCTLs, off-Site

Notes: PCE indicates tetrachloroethene; TCE indicates trichloroethene; cDCE indicates cis-1,2-dichloroethene;

GCTL indicates Groundwater Cleanup Target Level.

FR2711/Walker Plaza (ERIC_4783)_SOW_PARM Sampling_May 22_final

Prior to each quarterly groundwater sampling event, Geosyntec will gauge and record the depth-to-water (DTW) from 19 monitoring wells (this excludes MW008, MW009D, and UMW001) within a 24-hour period, including from 12 wells that are not anticipated to be sampled on the first day of field activities. Geosyntec will collect a total of 7 groundwater samples per quarterly event (28 samples total) using a peristaltic pump. Field activities will be conducted in accordance with the FDEP Standard Operating Procedures. Groundwater samples will be submitted under chain of custody protocol for laboratory analysis of VOHs by Environmental Protection Agency Method 8260B.

Action levels for the wells listed above will be as follows:

• The FDEP Groundwater Cleanup Target Level (GCTL) for tetrachloroethene (PCE) or 3 micrograms per liter (µg/L), where current PCE concentrations are less than its GCTL (i.e., MW006, MW012, MW013, and MW016)

• The FDEP GCTL for trichloroethene (TCE) or 3 µg/L, where TCE concentrations are less than its GCTL (i.e., MW002, MW006, MW010, MW012, and MW013).

• The FDEP Natural Attenuation Default Concentration (NADC) for PCE or 300 µg/L, where current PCE concentrations are greater than its GCTL but less than its NADC (i.e., MW002, MW010, and MW011)

• The FDEP NADC for TCE or 300 µg/L, where current TCE concentrations are greater than its GCTL but less than its NADC (i.e., MW016).

• The TCE action level at MW011 will be 1.5 times the 95% upper confidence level for historical TCE results (742 µg/L) at MW011 or 1,113 µg/L.

If analyses of groundwater samples indicate that concentrations of PCE or TCE exceed the action levels above, then a change order will be submitted and the well or wells exceeding the action levels will be resampled no later than 30 days after receipt of the analytical results for the corresponding quarter.

Based on previous sampling events, it is estimated that purge water generated during sampling activities will be containerized in one, 55-gallon drum. Geosyntec will collect one sample for VOHs during the last quarterly sampling event to update the waste characterization analytical results for disposal (see Subtask 6).

LOE SUBTASKS

Subtask 1 – Project Management

James Mills will serve as the Project Manager for the proposed SOW. Costs associated with this subtask are directly computed.

Subtask 2 – Quarter 2 PARM Sampling (June – August 2022)

Geosyntec will conduct one quarterly groundwater sampling event as outlined above, prepare and update the FDEP GIS Data Tables/ADaPT files electronically, and submit one field deliverable to the FDEP with groundwater sampling forms, laboratory analytical results, updated groundwater analytical results and DTW tables, and a Site Map figure.

Subtask 3 – Quarter 3 PARM Sampling (September – November 2022)

Geosyntec will conduct one quarterly groundwater sampling event as outlined above, prepare and update the FDEP GIS Data Tables/ADaPT files electronically, and submit one field deliverable to the FDEP with groundwater sampling forms, laboratory analytical results, updated groundwater analytical results and DTW tables, and a Site Map figure.

Subtask 4 – Quarter 4 PARM Sampling (December 2022 – February 2023)

Geosyntec will conduct one quarterly groundwater sampling event as outlined above, collect one IDW sample, prepare and update the FDEP GIS Data Tables/ADaPT files electronically, and submit one field deliverable to the FDEP with groundwater sampling forms, laboratory analytical results, updated groundwater analytical results and DTW tables, and a Site Map figure.

Subtask 5 – PARM Report

Approximately 60 days after receipt of the final quarter (i.e., Quarter 4) of groundwater analytical results, Geosyntec will submit one PARM Report that will be signed and sealed by a licensed Florida engineer or geologist and include analytical results, field forms, and updated tables and figures summarizing the four quarterly sampling events. The field forms will consist of groundwater sampling, calibration, DTW, and drum logs generated during quarterly sampling activities. The tables will include (i) DTW measurements, (ii) groundwater analytical results for VOHs, and (iii) geochemical field parameters. The figures will include (i) Site location Plan, (ii) Site map, (iii) groundwater elevation contours in the surficial aquifer, (iv) groundwater elevation contours in the intermediate aquifer, (v) groundwater analytical results in the surficial aquifer, and

(vi) groundwater analytical results in the intermediate aquifer.

Subtask 6 - IDW Management

This subtask includes generation and management of groundwater investigation-derived waste (IDW), which is estimated to include one drum. IDW will be staged inside the gated enclosure containing the SVE skid at the Site. Universal Environmental Solutions, LLC. is the lowest cost provider of transportation and disposal services per drum. Geosyntec will review the generation of a waste characterization profile as well as prepare the IDW manifest. IDW transportation and disposal quotes are provided in Attachment A. Field oversight of the final IDW pickup is not required.

Invoice and Deliverable Schedule

Please note the following schedule is contingent on FDEP review and approval of this SOW/LOE within two weeks of submittal. We have tentatively scheduled groundwater sampling for the week of 6/13/2022.

Subtask Deliverable Deliverable Date Invoice Amount 2 Q2 field deliverable, ADaPT files, and GIS data tables 09/30/2022 $4,628.18 3 Q3 field deliverable, ADaPT files, and GIS data tables 12/30/2022 $4,628.18 4 Q4 field deliverable, ADaPT files, and GIS data tables 03/31/2023 $4,698.18 5 Submittal of PARM Report 04/28/2023 $3,218.68

1, 6 Submittal of Final IDW manifest 05/26/2023 $2,009.55 Total $19,182.77

CLOSURE

As always, it is a pleasure to work with the FDEP. If you require any additional information or have any questions, please contact us at 813.558.0990.

Sincerely, James C. Mills, M.S.

Professional

Todd K. Kafka, P.G.

Senior Principal Hydrogeologist

Attachments Figures Attachment A – IDW Subcontractor Bids

LOE

FIGURES

MW009D (29.2-34.2)

PZ003 (3.7-13.7)

PZ002 (3.8-13.8)

PZ001 (3.8-13.8)

MW013 (3-13)

MW010 (3-13)

MW011 (27-32)

UMW001 (1.5-11.5)

MW007 (2.8-12.8)

MW006 (0.7-10.7)

MW005 (0.5-10.5)

MW004 (0.3-10.3)

MW002 (2.8-12.8)

MW001 (2.5-12.5)

MW008 (19.8-24.8)

MW003 (19.9-24.9)

MW016 (3.3-13.3)

Surficial Aquifer Monitoring Well VOH Analytical Results

Walker Plaza FDEP Facility ID No. ERIC_4783 603-617 North Maryland Avenue

Plant City, FL 33563

Figure

P a th

(T it u sv ill e -0

D A

TA

P

G

IS

F R

W a lk e rP la za

M

X D s\

G W

R e su lt s_

S u rf ic ia l_

M A

R

.m x d

A p ri l

L a st

E d it e d b y M

H e n sl e y

Tampa, FL April 2022

50 0 5025 Feet

³ N o rth

M a ry la n d

A v e n u e

Legend

&< Surficial Aquifer Monitoring Well (showing screen interval, ft BLS)

&> Piezometer (showing screen interval, ft BLS)

PCE 3 µg/L Isopleth

TCE 3 µg/L Isopleth

TCE 300 µg/L Isopleth

Rollup Door

Interior Wall

Door

Suite Separator

Current Floor Plan

Cooler

Counter

Freezers/Shelves

Freezers

Shelves

[ Location of Soil Vapor Extraction System Compound

Exterior Wall

Approximate Site Boundary

Approximate Parcel Boundary

East Baker Street

Notes:

1. ft BLS indicates feet below land surface.

2. FDEP indicates Florida Department of Environmental Protection.

3. VOH indicates volatile organic halocarbon.

4. Results are presented in micrograms per liter (µg/L).

5. GCTL indicates Groundwater Cleanup Target Level (Chapter 62-777, FAC)

6. NADC indicates Natural Attenuation Default Concentration (Chapter 62-777, FAC)

7. Yellow shading indicates detection of constituent above the GCTL in accordance with FDEP's "Rounding analytical data for site rehabilitation completion" dated 11/17/11.

8. Orange shading indicates detection of constituent above the NADC.

9. Bold text denotes detection above laboratory method detection limit (MDL)

10. U indicates that the compound was analyzed but not detected.

11. I indicates reported value is between the MDL and practical quantitation limit.

12. Source of monitoring well locations installed on Walker Plaza parcel: Figure 12 from the Limited Site Assessment and Interim

Source Removal Plan dated 6 November 2015 prepared by CB&I Environmental & Infrastructure, Inc.

13. Source of site features: Figure D-1 from the Limited Site Assessment and Interim Source Removal Plan dated 6 November 2015 prepared by CB&I Environmental & Infrastructure, Inc.

14. Source of parcel boundary shapefile dated 15 May 2016: Hillsborough County Property Appraiser's website.

15. Source of 2020 aerial: Florida Department of Transportation Surveying and Mapping, APLUS website.

16. Off-Site monitoring well locations (MW010 through MW015) were installed in February and May 2019. MW016 to MW018 were installed in March 2020.

17. UMW indicates unidentified monitoring well.

Plaza Coin Laundry

(509)

Plaza Coin Laundry

(601)

Felton's Meat and Produce Market

Walker Plaza

Dumpsters

Smoker

Emergency Generator

Former Dry Cleaner Location

Stormwater Retention Area

Analyte Abbreviation FDEP GCTL FDEP NADC

Tetrachloroethene PCE 3 300

Trichloroethene TCE 3 300 cis -1,2-Dichloroethene cDCE 70 700

Vinyl Chloride VC 1 100

Screening Criteria

Date

08/13/15 0.33 U 0.22 U 0.22 U 0.25 U

MW007

PCE TCE cDCE VCDate

08/13/15 0.33 U 3.2 6.9 0.25 U

MW008

PCE TCE cDCE VC

Date

08/13/15 0.33 U 3.1 5.3 0.25 U

MW009D

PCE TCE cDCE VC

Date

05/27/15 1.0 U 1.0 U 1.0 U 1.0 U

08/13/15 0.33 U 0.22 U 0.22 U 0.25 U

PZ001

PCE TCE cDCE VC

Date

08/13/15 1.3 0.22 U 0.22 U 0.25 U

10/30/18 0.50 U 0.61 U 0.32 U 0.26 U

10/01/19 0.50 U 0.61 U 0.32 U 0.26 U

03/20/20 0.50 U 0.61 U 0.32 U 0.26 U

04/03/20 0.50 U 0.61 U 0.32 U 0.26 U

06/29/20 0.50 U 0.61 U 0.32 U 0.26 U

09/02/20 0.50 U 0.61 U 0.32 U 0.26 U

12/10/20 0.50 U 0.61 U 0.32 U 0.26 U

MW003

PCE TCE cDCE VC

Date

05/30/19 0.50 U 0.61 U 0.72 I 0.26 U

03/20/20 0.50 U 0.61 U 0.89 I 0.26 U

06/30/20 0.50 U 0.61 U 1.0 0.26 U

09/02/20 0.50 U 0.61 U 0.32 U 0.26 U

12/09/20 0.50 U 0.61 U 0.37 I 0.26 U

MW013

PCE TCE cDCE VC

Date

05/27/15 1.0 U 1.0 U 1.0 U 1.0 U

08/13/15 0.33 U 0.50 U 0.22 U 0.25 U

PZ003

PCE TCE cDCE VC

Date

05/27/15 1.0 U 1.0 U 1.0 U 1.0 U

08/13/15 0.33 U 0.22 U 0.22 U 0.25 U

PZ002

PCE TCE cDCE VC

Date

08/14/15 30 0.22 U 0.22 U 0.25 U

10/30/18 12 0.61 U 0.32 U 0.26 U

10/01/19 1.7 I 0.61 U 0.32 U 0.26 U

04/03/20 0.50 U 0.61 U 0.32 U 0.26 U

06/26/20 0.50 U 0.61 U 0.32 U 0.26 U

10/02/20 1.6 I 0.61 U 0.32 U 0.26 U

MW005

PCE TCE cDCE VC

Date

08/13/15 0.33 U 0.22 U 0.22 U 0.25 U

MW001

PCE TCE cDCE VC

Date

05/27/15 1.0 U 1.0 U 1.0 U 1.0 U

5/27/15 (DUP) 1.0 U 1.0 U 1.0 U 1.0 U

08/13/15 0.33 U 0.22 U 0.22 U 0.25 U

UMW001

PCE TCE cDCE VC

Date

08/14/15 21 0.22 U 0.22 U 0.25 U

10/30/18 3.1 0.61 U 0.32 U 0.26 U

10/01/19 0.50 U 0.61 U 0.32 U 0.26 U

04/03/20 0.50 U 0.61 U 0.32 U 0.26 U

MW004

PCE TCE cDCE VC

Date

05/30/19 380 590 24 0.51 U

03/20/20 480 710 18 0.51 U

3/20/20 (DUP) 480 710 17 0.51 U

06/29/20 360 650 20 1.3 U

6/29/20 (DUP) 360 700 20 1.3 U

09/03/20 310 790 25 0.51 U

12/10/20 380 840 19 0.51 U

03/03/22 180 540 17 1.3 U

3/03/22 (DUP) 170 620 20 1.3 U

MW011

PCE TCE cDCE VC Date

08/14/15 38 1.7 5.1 0.25 U

10/30/18 22 0.61 U 0.32 U 0.26 U

10/01/19 13 0.61 U 0.32 U 0.26 U

04/03/20 7.0 0.61 U 0.67 I 0.26 U

06/26/20 8.2 0.62 I 1.8 0.26 U

10/02/20 4.6 0.61 U 0.32 U 0.26 U

07/13/21 4.8 0.61 U 0.75 I 0.26 U

03/03/22 2.7 0.61 U 0.77 I 0.26 U

MW006

PCE TCE cDCE VC

Date

03/20/20 0.50 U 1.7 I 0.54 I 0.26 U

06/30/20 0.50 U 1.0 I 1.0 0.26 U

09/02/20 0.50 U 1.1 I 2.1 0.26 U

12/09/20 0.50 U 5.0 1.9 0.26 U

03/02/22 0.29 U 3.8 3.3 0.26 U

PCE TCE cDCE VC

MW016

Date

08/13/15 131 4.3 8.6 0.25 U

10/30/18 170 19 44 0.26 U

10/30/18 (DUP) 180 18 43 0.26 U

10/01/19 140 15 31 0.26 U

10/01/19 (DUP) 130 15 29 0.26 U

03/20/20 55 1.8 I 1.2 0.26 U

04/03/20 53 1.9 I 2.0 0.26 U

4/3/20 (DUP) 54 1.8 I 1.9 0.26 U

06/29/20 93 7.6 29 0.26 U

09/03/20 89 2.8 6.7 0.26 U

9/3/2020 (DUP) 89 2.9 6.5 0.26 U

12/10/20 95 11 16 0.26 U

12/10/20 (DUP) 90 11 16 0.26 U

07/13/21 71 4.1 9.5 0.26 U

03/03/22 29 0.89 I 1.6 0.26 U

MW002

PCE TCE cDCE VC

Date

05/30/19 16 0.61 U 0.86 I 0.26 U

03/20/20 13 0.66 I 1.2 0.26 U

06/29/20 18 0.74 I 1.5 0.26 U

09/03/20 3.6 0.61 U 0.32 U 0.26 U

12/10/20 8.0 0.61 U 0.32 U 0.26 U

03/03/22 6.7 0.61 U 2.2 0.26 U

MW010

PCE TCE cDCE VC

MW014 (25-35)

MW012 (65-75)

MW017 (23-28)

MW015 (60-70)

MW018 (19.3-24.3)

Intermediate Aquifer Monitoring Well VOH Analytical Results

Walker Plaza FDEP Facility ID No. ERIC_4783 603-617 North Maryland Avenue

Plant City, FL 33563

Figure

P a th

(T it u sv ill e -0

D A

TA

T:

G

IS

F R

W a lk e rP la za

M

X D s\

G

W R e su lt s_

In te rm e d ia te M

A R

.m x d

M a rc h

M

A H

Tampa, FL March 2022

50 0 5025 Feet

³ N o rth

M a ry la n d

A v e n u e

Legend

Intermediate Aquifer Monitoring Well Location (showing screen interval, ft BLS)

Rollup Door

Interior Wall

Door

Suite Separator

Current Floor Plan

Cooler

Counter

Freezers/Shelves

Freezers

Shelves

Exterior Wall

[ Location of Soil Vapor Extraction System Compound

Approximate Site Boundary

Approximate Parcel Boundary

East Baker Street

Notes:

1. ft BLS indicates feet below land surface.

2. FDEP indicates Florida Department of Environmental Protection.

3. VOH indicates volatile organic halocarbon.

4. Results are presented in micrograms per liter (µg/L).

5. GCTL indicates Groundwater Cleanup Target Level (Chapter 62-777, FAC)

6. NADC indicates Natural Attenuation Default Concentration (Chapter 62-777, FAC)

7. Yellow shading indicates detection of constituent above the GCTL in accordance with FDEP's "Rounding analytical data for site rehabilitation completion" dated 11/17/11.

8. Bold text denotes detection above laboratory method detection limit (MDL)

9. U indicates that the compound was analyzed but not detected.

10. I indicates reported value is between the MDL and practical quantitation limit.

11. Source of site features: Figure D-1 from the Limited Site Assessment and Interim Source Removal Plan dated 6 November 2015 prepared by CB&I Environmental & Infrastructure, Inc.

12. Source of parcel boundary shapefile dated 15 May 2016: Hillsborough County Property Appraiser's website.

13. Source of 2020 aerial: Florida Department of Transportation Surveying and Mapping, APLUS website.

14. Off-Site monitoring well locations (MW010 through MW015) were installed in February and May 2019. MW016 to MW018 were installed in March 2020.

Plaza Coin Laundry

(509)

Plaza Coin Laundry

(601)

Felton's Meat and Produce Market

Walker Plaza

Dumpsters

Smoker

Emergency Generator

Former Dry Cleaner Location

Stormwater Retention Area

Analyte Abbreviation FDEP GCTL FDEP NADC

Tetrachloroethene PCE 3 300

Trichloroethene TCE 3 300 cis -1,2-Dichloroethene cDCE 70 700

Vinyl Chloride VC 1 100

Screening Criteria

Date

05/30/19 0.50 U 0.61 U 0.32 U 0.26 U

03/20/20 0.50 U 0.61 U 0.32 U 0.26 U

06/30/20 0.50 U 0.61 U 0.32 U 0.26 U

09/02/20 0.50 U 0.61 U 0.32 U 0.26 U

12/09/20 0.50 U 0.61 U 0.32 U 0.26 U

MW014

PCE TCE cDCE VC

Date

05/30/19 0.50 U 0.61 U 0.32 U 0.26 U

03/20/20 0.50 U 0.61 U 0.32 U 0.26 U

06/30/20 0.50 U 0.61 U 0.32 U 0.26 U

09/02/20 0.50 U 0.61 U 0.32 U 0.26 U

12/09/20 0.50 U 0.61 U 0.32 U 0.26 U

MW015

PCE TCE cDCE VC

Date

03/20/20 2.0 0.61 U 0.32 U 0.26 U

06/30/20 0.86 I 0.61 U 0.36 I 0.26 U

09/02/20 0.50 U 0.61 U 0.37 I 0.26 U

12/09/20 0.50 U 0.61 U 0.47 I 0.26 U

03/02/22 0.29 U 0.61 U 0.78 I 0.26 U

MW018

PCE TCE cDCE VC

Date

05/30/19 0.50 U 0.61 U 1.2 0.26 U

03/20/20 0.50 U 0.61 U 1.3 0.26 U

06/29/20 0.50 U 0.61 U 1.6 0.26 U

09/02/20 0.50 U 0.61 U 1.8 0.26 U

12/10/20 0.50 U 0.61 U 1.4 0.26 U

03/02/22 0.29 U 0.61 U 2.4 0.26 U

MW012

PCE TCE cDCE VC

Date

03/20/20 1.2 I 4.3 2.0 0.26 U

06/30/20 0.50 U 1.9 I 3.9 0.26 U

09/02/20 0.50 U 1.5 I 6.0 0.26 U

12/09/20 0.50 U 2.0 4.4 0.53 I

03/02/22 0.29 U 3.3 3.7 0.26 U

MW017

PCE TCE cDCE VC

ATTACHMENT A

IDW SUBCONTRACTOR BIDS

JMills Highlight

1/7/22, 11:18 AM Clark Environmental Inc.: Quote Builder quote.clarkenvironmental.com/Quotes/ViewQuote?quoteId=19200 1/2

Quote Number: 19200

QUOTE

QUOTED TO: Todd Kafka

QUOTE DATE: 1/7/2022

COMPANY NAME: Geosyntec - 2022 QUOTED BY: Craig Burns

PHONE NUMBER:

Ext.

FAX NUMBER:

PROJECT REFERENCE: Drum Trans & Disposal for non-haz materials - Petro, Dry Cleaner & PFAS

CUSTOMER PO:

CONTACT EMAIL:

SITE ADDRESS: TBD

CLARK ENVIRONMENTAL, INC. IS PLEASED TO PROVIDE THE FOLLOWING

COST ESTIMATE FOR

THE SITE/ PROJECT LISTED ABOVE.

DESCRIPTION PRICE QTY. UNIT TOTAL

NON HAZ DRUM DISPOSAL**Soils, Solids, Sludges** $80.00 DRUM $0.00

NON HAZ DRUM DISPOSAL**Liquids, PPE, Pads/Rags** $60.00 DRUM $0.00

TRANSPORTATION: 0-100 miles from CLARK Mulberry FL <6 drums/site - surcharge of $50/site

$30.00 DRUM $0.00

TRANSPORTATION: 101-250 miles from CLARK Mulberry FL <6 drums/site - surcharge of $50/site

$40.00 DRUM $0.00

TRANSPORTATION: 251-400 miles from CLARK Mulberry FL <11 drums/site - surcharge of $200/site

$50.00 DRUM $0.00

Totes T&D is available. CLARK can also deliver new drums to each site if needed :$40 + tax

$0.00 . $0.00

HAZ Drums to be quoted case-by-case $0.00 . $0.00

TOTAL REQUIRED ITEMS $0.00

TOTAL OPTIONAL ITEMS $0.00

GRAND TOTAL $0.00

NOTES: Rates apply for FL. Labs and profiles must be approved prior to pick ups.

**Petro Sites required: TCLP 4 metals & TCLP Benzene**Dry Cleaner Sites require 8260 VOH's** Craig Burns

863.327.6289 - cburns@clarkenv.com

This quote will remain valid for 2022 and based on payment in net 30 days. Quote based on an accepted and approved profile. Please sign and return to accept this quotation and by signing agree to all terms and conditions.

Name (print) Title

JMills Highlight

JMills Highlight

JMills Highlight

JMills Text Box 1 drum = $60 + $30 + $50 = $140

1/7/22, 11:18 AM Clark Environmental Inc.: Quote Builder quote.clarkenvironmental.com/Quotes/ViewQuote?quoteId=19200 2/2

Signature Date

CLARK ENVIRONMENTAL, INC. * 755 Prairie Industrial Pkwy. * Mulberry, Florida 33860 Telephone: 863-425-4884 * Fax: 863-425-2854

WWW.ClarkEnvironmental.com

BID PROPOSAL FORM 2022

FDEP Drycleaner and Hazardous Waste Sites

Investigation Derived Waste (IDW) Transportation and Disposal

Contractor Company Name: HEPACO, LLC

Contact: Linda Basinger, 813-240-8020, lbasinger@hepaco.com

Region T&D of 1 Non-Hazardous IDW Drum (solid or liquid), Process Code STAB01

T&D of 1 Hazardous IDW Drum (solid or liquid), Process Code STAB02

Northwest $ 191.27 $ 367.36

Northeast $ 191.27 $ 367.36

Central $ 170.00 $ 346.10

Southwest $ 170.00 $ 346.10

Southeast* $ 170.00 $ 346.10

Assumptions and Clarifications:

• Unless otherwise specified within this proposal all terms and conditions will be governed by the most recent Master Services

Agreement between GEOSYNTEC and HEPACO, LLC. In the event that a current agreement is not in place all terms and conditions will be governed by HEPACO’s standard service agreement.

• Price is contingent upon profile approval and process code approval into HEPACO’s preferred disposal facilities.

• A minimum stop fee of $500.00 will apply to all shipments.

• The above rates are for less than truck load quantities (LTL). In the event that a higher volume of disposal is needed at any particular facility HEPACO will provide a case by case pricing scenario to help reduce overall cost.

• Above rates include a standard energy and insurance fee. In the event that market changes dramatically HEPACO reserves the right to increase or decrease these fees based on the appropriate energy index. In the event that this is required HEPACO will provide a

30 day written notice of the change.

* Excludes Monroe County (Case by case basis determined by volume of IDW)

• Bid costs above should be inclusive of transportation fees, fuel fees, environmental recovery fees, etc.

• No standby time should be included in the above bid costs.

• Assume that the drums are accessible.

• It is assumed that VOH totals results will be provided for profiling. If other analytical results are required, please indicated here:

Branch Locations Serving Florida:

Tampa

Gary Weiss, Project Manager

5371 Hartford St, Tampa gweiss@hepaco.com

813.550.7229 Mbl

Jacksonville

Andy Moats, Project Manager

1830 Clarkson St, Jacksonville amoats@hepaco.com

706.829.0145 Mbl

Panhandle

Chad Cobb, Project Manager

3490 Hurricane Bay Dr, Theodore AL ccobb@hepaco.com

251.293.9598 mailto:gweiss@hepaco.com mailto:amoats@hepaco.com mailto:ccobb@hepaco.com TKafka Highlight

JMills Text Box 1 drum = $170 + $500 = $670

JMills Highlight