CN-370000-HW683-DC05BCO3.pdf

Funding Information:

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

Category Grant # Project # Year Amount

☐ Additional Funding Information attached on separate page.

Rev. 8/17/2020

STATE OF FLORIDA

DEPARTMENT OF ENVIRONMENTAL PROTECTION

Task Assignment Change Order This Change Order is entered into between the Parties named below and amends the Task Assignment (TA) and any previous TA Change Orders (TACO) as follows:

1. TA Number: TACO Number: Contract Number:

TACO Description:

2. Parties State of Florida Department of Environmental Protection (Department)

Department’s Project Manager: Department’s 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 Name:

4. ☐ There are no changes to the TA compensation.

☐ The compensation of the TA is changed to the amounts indicated below:

Amended Price Price Prior to TACO ☐ Fixed Price:

☐ Fixed Unit Rate: (Extended Price)

☐ Cost Reimbursement:

Total TA Value:

5. ☐ There are no changes to the TA Expiration Date.

☐ The TA Completion Date is changed from ______________ to ______________ (a total of ______ days).

6. ☐ There are no changes to the Attachments.

☐ Attachment ___ is replaced with Attachment -____.

7. ☐ No Additional Changes.

☐ Additional Changes:

8. All other terms and conditions of the TA remain in effect. If and to the extent that any inconsistencies may appear between the TA and this TACO, the provisions of this TACO shall control.

IN WITNESS WHEREOF, this TACO 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.

DC005B 3 HW683

This Task Assignment Change Order authorizes an increase to reconcile WCD 1, in accordance with the March 21, 2023, scope and cost estimate.

Brittany Plyler 850-245-8851 Contractor Contractor

Contractor Contractor

Contractor

Geosyntec James Mills 813-558-0999

ERIC_4783

Walker Plaza

✔ $ 20,111.74 $ 18,263.07

$ 20,111.74 $ 18,263.07 Completion

Completion✔ 08/26/2023 01/31/2024 158

✔ 1 1 3

Geosytec

Todd Kafka

Contract Manager

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

Date: 2023.03.31 08:30:01 -04'00'

Jennifer Farrell

Digitally signed by Jennifer Farrell Date: 2023.03.30 16:19:42 -04'00'

N/A

Task Assignment Notification/Change Order Deliverables and Invoice Schedule Attachment

WCP TAFORM 01_18

Contract Number:

Task Assignment #:

Change Order #:

Deliverables:

Deliverable Deliverable Due Date

Invoice Schedule:

Requirements for Invoice Submittal Amount to be Invoiced

TOTAL COST

HW683

DC005B

$ 20,111.74

Subtask 2: Q2 field deliverable

Subtask 3: Q3 field deliverable

Subtask 4: Q4 field deliverable

Subtask 5: Submittal of PARM Report

Subtask 6: Submittal of Final IDW manifest

Subtask 1 & 7: Submittal of Quarterly Vegetation Maintenance Summary Emails;

Project Management

Subtask 2:FDEP receipt and approval of Q2 field deliverable

Subtask 4:FDEP receipt and approval of Q4 field deliverable

Subtask 5:FDEP receipt and approval of PARM Report

Subtask 1 & 7: FDEP receipt and approval of Quarterly Vegetation Maintenance Summary Emails; Project Management

Subtask 6:FDEP receipt and approval of Final IDW manifest

Subtask 3: FDEP receipt and approval of Q3 field deliverable

09/30/2022

12/30/2022

03/31/2023

04/28/2023

12/29/2023

05/26/2023

$ 4,241.69

$ 4,241.69

$ 4,311.70

$ 3,218.68

$ 2,249.31

$ 1,848.67

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, Florida

ERIC_4783

From: Brittany Plyler, Project Manager Date: March 29, 2023 Subject: Negotiation Summary

HW683_DC005B-3

This Task Assignment Change Order authorizes an increase to reconcile WCD 1, in accordance with the March 21, 2023, scope and cost estimate. The total increase is $1,848.67.

Geosyntec confirmed on March 14, 2023, that subtask 1 consists of the calculated project management labor, based upon 13% of the direct labor costs in this proposal, and includes fringe, overhead, other direct costs (ODCs) and completion fees.

There are no changes to Subtask 2, 3, 4, 5, and 6.

Subtask 7: This Subtask includes labor and expenses to maintain vegetation within the SVE system compound for two quarters while the SVE system remains on-Site. Geosyntec will manually grub vegetation and/or utilize a weed trimmer to maintain vegetation within the SVE system compound. Geosyntec will photo document the SVE system compound before and after the vegetation maintenance activities.

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 $20,111.74 with 141 labor hours.

Printed on recycled paper.

FDEP COST ESTIMATEContractor: Geosyntec Consultants

Date: 3/20/2023

Task #: DC005B-3 (pending) SubTask 1 Project Management SubTask 6 IDW Management

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

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 14.2 $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 39 6 6 6 16 1 4 0 0 0 $32.21 Senior Staff Professional A. Langteau 3 1 1 1 0 0 0 0 0 0 $29.33 Staff Professional A. Lamore 76 22 22 22 0 0 10 0 0 0 $27.88 Administrative Assistant A. Acosta 1 0 0 0 1 0 0 0 0 0

Total Hours 141 14 29 29 29 25 1 14 0 0 0

Direct Labor $4,865.07 $559.70 $913.99 $913.99 $913.99 $1,073.00 $39.42 $450.98 $0.00 $0.00 $0.00

Overhead 172.70% $8,401.97 $966.60 $1,578.46 $1,578.46 $1,578.46 $1,853.07 $68.08 $778.84 $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 $13,267.04 $1,526.30 $2,492.45 $2,492.45 $2,492.45 $2,926.07 $107.50 $1,229.82 $0.00 $0.00 $0.00

Travel Vehicle Rental $960.00 $240.00 $240.00 $240.00 $0.00 $0.00 $240.00 $0.00 $0.00 $0.00

REV: 02/03 CEF ARCADIS Page 1

Task #: DC005B-3 (pending) SubTask 1 Project Management SubTask 6 IDW Management

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

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 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 $960.00 $240.00 $240.00 $240.00 $0.00 $0.00 $240.00 $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 $480.00 $0.00 $0.00 $0.00 $0.00 $480.00 $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 $480.00 $0.00 $0.00 $0.00 $0.00 $480.00 $0.00 $0.00 $0.00 $0.00 Handling Fee $48.00 $0.00 $0.00 $0.00 $0.00 $48.00 $0.00 $0.00 $0.00 $0.00 Total Subcontractor Cost $528.00 $0.00 $0.00 $0.00 $0.00 $528.00 $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 $320.00 $80.00 $80.00 $80.00 $0.00 $0.00 $80.00 $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 $2,160.00 $660.00 $660.00 $660.00 $0.00 $100.00 $80.00 $0.00 $0.00 $0.00

Subtotal $18,785.04 $1,526.30 $3,992.45 $3,992.45 $4,062.45 $2,926.07 $735.50 $1,549.82 $0.00 $0.00 $0.00 Completion Fee $1,326.72 $152.63 $249.25 $249.25 $249.25 $292.61 $10.75 $122.98 $0.00 $0.00 $0.00

Total Estimated Cost $20,111.74 $1,678.93 $4,241.69 $4,241.69 $4,311.70 $3,218.68 $746.25 $1,672.80 $0.00 $0.00 $0.00

Original $18,263.07 $1,503.06 $4,241.69 $4,241.69 $4,311.70 $3,218.68 $746.25 $0.00

TACO-3 $1,848.67 $175.87 $0.00 $0.00 $0.00 $0.00 $0.00 $1,672.80

CEF Rouding Error $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Final $20,111.74 $1,678.93 $4,241.69 $4,241.69 $4,311.70 $3,218.68 $746.25 $1,672.80

REV: 02/03 CEF ARCADIS Page 2

Task #: DC005B-3 (pending) SubTask 1 Project Management SubTask 6 IDW Management

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

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

ST 1 & 6 $2,425.18

REV: 02/03 CEF ARCADIS Page 3

LEVEL OF EFFORT/EXPENSE WORKSHEET

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

DATE: 3/20/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 6

Senior Staff Professional A. Langteau 1

Staff Professional A. Lamore

TOTAL LABOR 29

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)

TACO-1 - Analytical data input

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: 3/20/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 6

Senior Staff Professional A. Langteau 1

Staff Professional A. Lamore

TOTAL LABOR 29

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)

TACO-1 - Analytical data input

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: 3/20/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 6

Senior Staff Professional A. Langteau 1

Staff Professional A. Lamore

TOTAL LABOR 29

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)

TACO-1 - Analytical data input

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: 3/20/2023

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: 3/20/2023

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 TACO-2 $0.00 $0.00

T&D - Erwin TACO-2 - profile and 1 drum $480.00 $480.00

Subtotal $480.00

TOTAL SUB $480.00

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)

SUBTASK: 2 Quarters Vegetation Maintenance

DATE: 3/20/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 4

Staff Professional A. Lamore 10

TOTAL LABOR 14

VEHICLE TYPE RATE UNIT USEAGE

Truck $120.00 Day 2 $240.00 Subtotal $240.00

TOTAL VEHICLE $240.00

EQUIPMENT ITEM RATE COSTING UNIT USEAGE TOTALS

Expendables

$40.00 Day 2 $80.00 Subtotal $80.00

TOTAL EQUIPMENT $80.00

RPO coordination (1 hr/quarter = 2 hr); prepare quarterly email summaries (1 hr/quarter = 2 hr)

Field preparation (1 hr/quarter = 2 hr); mobe/demobe (1 hr/quarter = 2 hr); remove vegetation in SVE compound and inspect long-term storage of SVE system (3 hr/quarter =

FDEP COST ESTI MATEContractor: Geosyntec Consultants

Task #: DC005B-3 (pending) SubTask 1 Project Management SubTask 6

Site: Walker Plaza SubTask 2 SubTask 7 2 Quarters Vegetation Maintenance

Activity/Phase: Vegetation Maitenance SubTask 3 SubTask 8

Project Manager: James Mills SubTask 4 SubTask 9

SubTask 5 SubTask 10

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

$39.42 Project Manager J. Mills 2 1.5 $0.00 Principal T. Kafka 0 0 0 0 0 0 0 0 0 0 $0.00 Project Professional M. Hensley 0 0 0 0 0 0 0 0 0 0

$39.42 Professional J. Mills 4 0 0 0 0 0 4 0 0 0 $0.00 Senior Staff Professional A. Langteau 0 0 0 0 0 0 0 0 0 0

$29.33 Staff Professional A. Lamore 10 0 0 0 0 0 10 0 0 0 $0.00 Administrative Assistant A. Acosta 0 0 0 0 0 0 0 0 0 0

Total Hours 16 2 0 0 0 0 0 14 0 0 0

Direct Labor $509.61 $58.63 $0.00 $0.00 $0.00 $0.00 $0.00 $450.98 $0.00 $0.00 $0.00

Overhead 172.70% $880.09 $101.25 $0.00 $0.00 $0.00 $0.00 $0.00 $778.84 $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 $1,389.70 $159.88 $0.00 $0.00 $0.00 $0.00 $0.00 $1,229.82 $0.00 $0.00 $0.00

Travel Vehicle Rental $240.00 $0.00 $0.00 $0.00 $0.00 $0.00 $240.00 $0.00 $0.00 $0.00

REV: 02/03 CEF ARCADIS Page 10

Task #: DC005B-3 (pending) SubTask 1 Project Management SubTask 6

Site: Walker Plaza SubTask 2 SubTask 7 2 Quarters Vegetation Maintenance

Activity/Phase: Vegetation Maitenance SubTask 3 SubTask 8

Project Manager: James Mills SubTask 4 SubTask 9

SubTask 5 SubTask 10

Totals 1 2 3 4 5 6 7 8 9 10 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 $240.00 $0.00 $0.00 $0.00 $0.00 $0.00 $240.00 $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 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $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 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Handling 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

Laboratory Analytical Costs $0.00 $0.00 $0.00 $0.00 $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 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Laboratory $0.00 $0.00 $0.00 $0.00 $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 $80.00 $0.00 $0.00 $0.00 $0.00 $0.00 $80.00 $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) $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Equipment (IDW related) $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $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 $80.00 $0.00 $0.00 $0.00 $0.00 $0.00 $80.00 $0.00 $0.00 $0.00

Subtotal $1,709.70 $159.88 $0.00 $0.00 $0.00 $0.00 $0.00 $1,549.82 $0.00 $0.00 $0.00 Completion Fee $138.97 $15.99 $0.00 $0.00 $0.00 $0.00 $0.00 $122.98 $0.00 $0.00 $0.00

Total Estimated Cost $1,848.67 $175.87 $0.00 $0.00 $0.00 $0.00 $0.00 $1,672.80 $0.00 $0.00 $0.00

REV: 02/03 CEF ARCADIS Page 11

SUBTASK: 2 Quarters Vegetation Maintenance

DATE: 3/20/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Professional J. Mills 4

Staff Professional A. Lamore 10

TOTAL LABOR 14

VEHICLE TYPE RATE UNIT USEAGE

Truck - TACO-3 $120.00 Day 2 $240.00 Subtotal $240.00

TOTAL VEHICLE $240.00

EQUIPMENT ITEM RATE COSTING UNIT USEAGE TOTALS

Expendables

TACO-3 $40.00 Day 2 $80.00 Subtotal $80.00

TOTAL EQUIPMENT $80.00

TACO-3 - RPO coordination (1 hr/quarter = 2 hr); prepare quarterly email summaries (1 hr/quarter = 2 hr)

TACO-3 - Field preparation (1 hr/quarter = 2 hr); mobe/demobe (1 hr/quarter = 2 hr);

remove vegetation in SVE compound and inspect long-term storage of SVE system (3 hr/quarter = 6 hr)

Date: 12/20/2022

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 13 12.7 $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 3 1 1 1 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 126 13 29 29 29 25 1 0 0 0 0

Direct Labor $4,355.46 $501.07 $913.99 $913.99 $913.99 $1,073.00 $39.42 $0.00 $0.00 $0.00 $0.00

Overhead 172.70% $7,521.88 $865.35 $1,578.46 $1,578.46 $1,578.46 $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 $11,877.34 $1,366.42 $2,492.45 $2,492.45 $2,492.45 $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

REV: 02/03 CEF ARCADIS Page 1

Date: 12/20/2022

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 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 $480.00 $0.00 $0.00 $0.00 $0.00 $480.00 $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 $480.00 $0.00 $0.00 $0.00 $0.00 $480.00 $0.00 $0.00 $0.00 $0.00 Handling Fee $48.00 $0.00 $0.00 $0.00 $0.00 $48.00 $0.00 $0.00 $0.00 $0.00 Total Subcontractor Cost $528.00 $0.00 $0.00 $0.00 $0.00 $528.00 $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 $17,075.34 $1,366.42 $3,992.45 $3,992.45 $4,062.45 $2,926.07 $735.50 $0.00 $0.00 $0.00 $0.00 Completion Fee $1,187.75 $136.64 $249.25 $249.25 $249.25 $292.61 $10.75 $0.00 $0.00 $0.00 $0.00

Total Estimated Cost $18,263.07 $1,503.06 $4,241.69 $4,241.69 $4,311.70 $3,218.68 $746.25 $0.00 $0.00 $0.00 $0.00

REV: 02/03 CEF ARCADIS Page 2

Site Name: Site ID #:

Contract #: Contractor:

• Reason for Work Change Directive :

• Description of Work Change Directive :

• Attachments (if applicable, list documents supporting change):

• Costs (if negotiated unit costs, provide information below):

WCP WCD 07-2018

Authorized Contractor Signature:

Authorized FDEP Signature:

WORK CHANGE DIRECTIVE FORM

FDEP Supervisor Approval:

(if applicable)

Additional work is not authorized without prior FDEP approval as indicated by an approved Work Change Directive Form or Task Assignment Change Order Form. It is the Contractor's responsibility to ensure that additional costs associated with this WCD are resolved by a Task Assignment Change Order (TACO) prior to the completion date of the original Task Assignment or subsequent TACOs completed prior to the execution date of this WCD. Failure to do so will result in a loss of reimbursement for work associated with this WCD.

Task Assignment #: Work Change Directive #:

Maximum Estimated Increase in Task Amount:

Walker Plaza ERIC 4783

HW683 Geosyntec Consultants

DC005B-2 1

During the recent IDW pickup, significant vegetation was observed within the SVE system compound. This WCD includes 2 quarters of vegetation maintenance until the proposed NAM sampling event in December 2023.

Labor and expenses to conduct 2 quarters of vegetation maintenance and prepare quarterly email summaries of each event.

Photograph of the SVE system compound immediately prior to the IDW pickup.

$ 2,400.00

Todd Kafka, P.G.

Digitally signed by Todd Kafka, P.G.

Date: 2023.03.10 17:59:01 -05'00'

Brittany Plyler Digitally signed by Brittany Plyler Date: 2023.03.13 14:21:18 -04'00'

Aaron Cohen Digitally signed by Aaron Cohen Date: 2023.03.13 14:29:54 -04'00'

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)_DC005B_PARM Sampling_TACO 3_Mar 2023, v2

31 May 2022 (Revised 21 March 2023)

Ms. Brittany Plyler Florida Department of Environmental Protection Waste Cleanup Program 2600 Blair Stone Road Tallahassee, FL 32399-2400

Subject: SOW/LOE – Post Active Remediation Monitoring – DC005B, TACO 3 Walker Plaza (ERIC_4783) 603 – 617 North Maryland Avenue Plant City, Florida

Dear Ms. Plyler:

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.

Task Assignment Change Order 1 (TACO 1) reconciles labor associated with ADaPT deliverable data tables. Per email guidance from the FDEP on 1 July 2022, ADaPT data tables/files should not be submitted for review.

TACO 2 reconciles costs associated with groundwater IDW. In December 2022, Quarter 4 PARM sampling (DC005B-1) was conducted concurrently with the collection of groundwater samples to screen for the presence/absence of per- and polyfluoroalkyl substances (PFAS) in accordance with HW013A. PFAS groundwater analytical results indicated that the perfluorooctane sulfonate (PFOS) concentration exceeded its provisional GCTL at MW010. During the December sampling event, purge water from the Quarter 4 and PFAS sampling activities was combined in one drum.

Since PFOS was detected above its provisional GCTL, the one drum containing groundwater IDW from PARM sampling activities associated with DC005B-1 and PFAS groundwater sampling activities associated with HW013A will be disposed of as PFAS-impacted IDW.

TACO 3 reconciles costs associated with Work Change Directive 1 (WCD 1) that was approved on 13 March 2023. During the pickup of groundwater IDW on 7 February 2023, significant

Ms. Brittany Plyler 31 May 2022 (Revised 21 March 2023)

FR2711/Walker Plaza (ERIC_4783)_DC005B_PARM Sampling_TACO 3_Mar 2023, v2 vegetation was observed within the soil vapor extraction (SVE) system compound on-Site. TACO 3 includes two quarters of vegetation maintenance until the NAM groundwater sampling event that is proposed for December 2023. Revisions to the original scope of work are provided in red font.

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.

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. TACO-1 removes labor associated with submitting ADaPT data/tables to the FTP site for review. TACO-1 includes effort to use ADaPT to QA/QC all analytical data and perform required data checks/review to satisfy QA/QC requirements.

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. TACO-1 removes labor associated with submitting ADaPT data/tables to the FTP site for review. TACO-1 includes effort to use ADaPT to QA/QC all analytical data and perform required data checks/review to satisfy QA/QC requirements.

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. TACO-1 removes labor associated with submitting ADaPT data/tables to the FTP site for review. TACO- 1 includes effort to use ADaPT to QA/QC all analytical data and perform required data checks/review to satisfy QA/QC requirements.

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.

TACO-2 includes cost for Erwin Remediation to dispose of one drum containing known PFAS and VOH impacts. Although initially proposed above, UES declined to conduct disposal of PFAS-impacted waste.

Subtask 7 – Two Quarters of Vegetation Maintenance

This subtask includes labor and expenses to maintain vegetation within the SVE system compound for two quarters while the SVE system remains on-Site (anticipated March through December 2023). Geosyntec will manually grub vegetation and/or utilize a weed trimmer to maintain vegetation within the SVE system compound. Geosyntec assumes any vegetation or trash that is removed from the SVE system can be disposed in the dumpster on-Site. Additionally, Geosyntec will inspect the condition of the seals and/or caps installed on the SVE system as part of preparation for long-term storage during the vegetation maintenance visits. Geosyntec will photo document the SVE system compound before and after the vegetation maintenance activities.

Geosyntec will prepare quarterly email summaries of each event that include select photos of the vegetation maintenance activities.

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. TACO 1 results in a decrease of $1,310.20. TACO 2 results in an increase of $390.50. TACO 3 results in an increase of $1,848.67, which is less than the approved amount for WCD 1 of $2,400.00.

Subtask Deliverable Deliverable Date

Invoice Amount

2 Q2 field deliverable 09/30/2022 $4,241.69 3 Q3 field deliverable 12/30/2022 $4,241.69 4 Q4 field deliverable 03/31/2023 $4,311.70 5 Submittal of PARM Report 04/28/2023 $3,218.68

1, 6 Submittal of Final IDW manifest 05/26/2023 $2,249.31

1,7 Submittal of Quarterly Vegetation Maintenance Summary Emails 12/29/2023 $1,848.67

Total $20,111.74

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, E.I.

Professional

Todd K. Kafka, P.G.

Senior Principal Hydrogeologist

Attachments Figures Attachment A – IDW Subcontractor Bids

LOE

Note, Figures 1 to 3 and Attachment A are not related to TACO 3 and are not provided.

Funding Information:

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

Category Grant # Project # Year Amount

Additional Funding Information attached on separate page.

Rev. 8/17/2020

STATE OF FLORIDA

DEPARTMENT OF ENVIRONMENTAL PROTECTION

Task Assignment Change Order This Change Order is entered into between the Parties named below and amends the Task Assignment (TA) and any previous TA Change Orders (TACO) as follows:

1. TA Number: TACO Number: Contract Number:

TACO Description:

2. Parties State of Florida Department of Environmental Protection (Department)

Department’s Project Manager: Department’s 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 Name:

4. There are no changes to the TA compensation.

The compensation of the TA is changed to the amounts indicated below:

Amended Price Price Prior to TACO Fixed Price:

Fixed Unit Rate: (Extended Price)

Cost Reimbursement:

Total TA Value:

5. There are no changes to the TA Expiration Date.

The TA Completion Date is changed from ______________ to ______________ (a total of ______ days).

6. There are no changes to the Attachments.

Attachment ___ is replaced with Attachment -____.

7. No Additional Changes.

Additional Changes:

8. All other terms and conditions of the TA remain in effect. If and to the extent that any inconsistencies may appear between the TA and this TACO, the provisions of this TACO shall control.

IN WITNESS WHEREOF, this TACO 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.

DC005B 2 HW683

This Task Assignment Change Order authorizes an increase to reconcile costs for groundwater IDW, in accordance with the December 22, 2022 scope of work and cost estimate.

Brittany Plyler 850-245-8851 Contractor Geosyntec Contractor

Contractor James Mills Contractor 8813-379-4389

ERIC_4783

Walker Plaza

✔ $ 18,263.07 $ 17,872.57

$ 18,263.07 $ 17,872.57 ✔ Completion

Completion 0

✔ 1 1 2

Geosytec Contractor Todd Kafka

Contract Manager

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

Date: 2023.01.27 16:53:21 -05'00' Kelly Crain Digitally signed by Kelly Crain

Date: 2023.01.27 12:09:57 -05'00'

N/A

Task Assignment Notification/Change Order Deliverables and Invoice Schedule Attachment

Contract Number:

Task Assignment #:

Deliverables:

Deliverable Deliverable Due Date

Invoice Schedule:

Requirements for Invoice Submittal Amount to be Invoiced

TOTAL COST

HW683

DC004B

$ 18,263.07

Subtask 2- Submittal of Q2 field deliverable, ADaPT files, and GIS data tables

Subtask 3- Submittal of Q3 field deliverable, ADaPT files, and GIS data tables

Subtask 4- Submittal of Q4 field deliverable, ADaPT files, and GIS data tables

Subtask 5- Submittal of PARM Report

Subtask 1,6- Submittal of Final IDW manifest; Project Management

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

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

Subtask 5- FDEP receipt and approval of PARM Report

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

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

09/30/2022

12/30/2022

03/31/2023

04/28/2023

05/26/2023

$ 4,241.69

$ 4,241.69

$ 4,311.70

$ 3,218.68

$ 2,249.31