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

DC029A Completion May 30, 2023

This Task Assignment authorizes Geosyntec to conduct supplemental site assessment activities following cessation and decommissioning of drycleaning activities at the Art Craft Cleaners site in Jacksonville, Florida accordance with the Geosyntec scope of work, cost estimate, and schedule received on February 3, 2023.

Brittany Plyler 850-245-8851 Contractor Contractor

Contractor Contractor

Contractor Contractor

Contractor

Geosyntec

Geosyntec

Blaine Dawson 904-450-4271

ERIC_4584

1630 University Bouelvard South, Jacksonville, FL 32216

Art Craft Cleaners

✔ $ 49,049.05

$ 49,049.05

Scope of Work

Todd Kafka

Contract Manager

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

Date: 2023.02.03 16:08:33 -05'00'

Jennifer Farrell

Digitally signed by Jennifer Farrell Date: 2023.02.03 15:31:06 -05'00'

N/A

Murphy_SL Highlight

Murphy_SL Highlight

Murphy_SL Highlight

Murphy_SL Highlight

Murphy_SL Highlight

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: Field deliverable for soil sampling and MAGS with summary figures and tables 02/24/2023

Subtask 3: Field deliverable for groundwater sampling 03/03/2023

Subtask 4: Submittal of IDW Manifest 03/17/2023

Subtask 1 & 5: Submittal of Supplemental Site Assessment Report Project Management 04/28/2023

Subtask 2: Submittal and FDEP approval of the Field Deliverable for soil sampling and MAGS with summary figures and tables $ 32,798.80

Subtask 3: Submittal of the Field Deliverable for groundwater sampling $ 7,838.17

Subtask 4: Submittal of IDW Manifest $ 726.77

Subtask 1 & 5: Submittal of the Supplemental Site Assessment Report; Project Management $ 7,685.31

$ 0.00

$ 49,049.05

HW683

DC029A

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 Art Craft Cleaners Jacksonville, FL 32216

ERIC_4584

From: Brittany Plyler, Project Manager Date: February 3, 2023 Subject: Negotiation Summary

HW683 DC029A

This Task Assignment authorizes Geosyntec to conduct supplemental site assessment activities following cessation and decommissioning of drycleaning activities at the Art Craft Cleaners site in Jacksonville, Florida accordance with the Geosyntec scope of work, cost estimate, and schedule received on February 3, 2023.

Geosyntec confirmed on February 1, 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.

Subtask 2: Subtask 2 includes costs for Geosyntec personnel to mobilize to the Site to observe a private underground utility survey as well as locate, uncover, and evaluate historical soil vapor extraction wells for use during the proposed MAGS testing. Geosyntec personnel will also conduct soil sampling at up to 11 locations (SB-14 through SB-23 and MAGS009)

Subtask 3: Subtask 3 includes costs for sampling activities of 18 Site monitoring wells as well evaluate groundwater flow direction. Monitoring wells to be sampled include eight (8) shallow monitoring wells (PZ01 through PZ03, MW01, SMW01 through SMW03, and SMW05), six (6) intermediate monitoring wells (IMW01 through IMW06) and four (4) deep monitoring wells (DMW01 through DMW04). Sample will be shipped to a NELAP.

Subtask 4: Geosyntec will containerize soil and groundwater investigation derived waste (IDW) in two 55- gallon steel drums pending off-Site transportation and disposal

Subtask 5: This subtask includes costs to generate a SSAR that summarizes the analytical results of the assessment activities outlined above and complies with the requirements of Chapter 62- 780.600, Florida Administrative Code.

Geosyntec Confirmed site access February 2, 2023

PFAs cost were removed from this TA at the request of FDEP Technical Staff.

MEMORANDUM

Art Craft February 3, 2023 Page Two

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 $49,049.05 with 248 labor hours.

FDEP COST ESTIMATEContractor: Geosyntec Consultants

Date: 1/31/2023

Task #: SubTask 1 Project Management SubTask 6 PFAS Screening Deliverable

Site: Art Craft Cleaners SubTask 2 Soil Sampling and MAGS SubTask 7

Activity/Phase: Assessment SubTask 3 Groundwater Sampling SubTask 8

Project Manager: Brittany Plyler SubTask 4 IDW Management SubTask 9

SubTask 5 SSAR SubTask 10

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

$49.76 Project Manager B. Dawson 21 20.8 $76.92 Principal T. Kafka 0 0 0 0 0 0 0 0 0 0 $74.76 Principal R. Klinger 4 2 0 0 2 0 0 0 0 0 $49.76 Project Professional B. Dawson 26 18 3 1 4 0 0 0 0 0 $46.15 Project Professional M. Hensley 9 4 0 0 5 0 0 0 0 0 $36.06 Senior Staff Professiona K. Pierce 46 46 0 0 0 0 0 0 0 0 $30.29 Staff Professional D. McGill 128 59 39 0 30 0 0 0 0 0 $30.29 Staff Professional M. Rommer 13 13 0 0 0 0 0 0 0 0 $37.26 Administrative Assistant P. Gallagher 1 0 0 0 1 0 0 0 0 0

Total Hours 248 21 142 42 1 42 0 0 0 0 0

Direct Labor $9,011.82 $1,036.76 $5,069.44 $1,330.59 $49.76 $1,525.27 $0.00 $0.00 $0.00 $0.00 $0.00

Overhead 172.70% $15,563.41 $1,790.48 $8,754.92 $2,297.93 $85.94 $2,634.14 $0.00 $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 $24,575.23 $2,827.24 $13,824.36 $3,628.52 $135.70 $4,159.41 $0.00 $0.00 $0.00 $0.00 $0.00

Travel Vehicle Rental $1,800.00 $1,320.00 $480.00 $0.00 $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 $528.00 $528.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Travel $2,328.00 $1,848.00 $480.00 $0.00 $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

Cost Estimate Page 1 of 6 Cost Estimate

FDEP COST ESTIMATEContractor: Geosyntec Consultants

Date: 1/31/2023

Task #: SubTask 1 Project Management SubTask 6 PFAS Screening Deliverable

Site: Art Craft Cleaners SubTask 2 Soil Sampling and MAGS SubTask 7

Activity/Phase: Assessment SubTask 3 Groundwater Sampling SubTask 8

Project Manager: Brittany Plyler SubTask 4 IDW Management SubTask 9

SubTask 5 SSAR SubTask 10

Totals 1 2 3 4 5 6 7 8 9 10 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 $525.00 $0.00 $0.00 $525.00 $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 GeoView - Utility Locate $900.00 $900.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

$0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $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 $1,425.00 $900.00 $0.00 $525.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Handling Fee $142.50 $90.00 $0.00 $52.50 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Subcontractor Cost $1,567.50 $990.00 $0.00 $577.50 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

Laboratory Analytical Costs $10,315.00 $9,001.00 $1,314.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Fast Turnaround Charges $1,425.80 $1,163.00 $262.80 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Sample Shipping $1,120.00 $750.00 $370.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Laboratory $12,860.80 $10,914.00 $1,946.80 $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 $360.00 $200.00 $160.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Equipment (Drilling related) $1,285.00 $1,285.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Equipment (Analytical related) $2,040.00 $880.00 $1,160.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Equipment (IDW related) $300.00 $200.00 $100.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Equipment (Other) $1,275.00 $1,275.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Total Field Expenses $5,260.00 $3,840.00 $1,420.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

Subtotal $46,591.53 $2,827.24 $31,416.36 $7,475.32 $713.20 $4,159.41 $0.00 $0.00 $0.00 $0.00 $0.00 Completion Fee $2,457.52 $282.72 $1,382.44 $362.85 $13.57 $415.94 $0.00 $0.00 $0.00 $0.00 $0.00

Total Estimated Cost $49,049.05 $3,109.96 $32,798.80 $7,838.17 $726.77 $4,575.35 $0.00 $0.00 $0.00 $0.00 $0.00

Labor Expense 7 Subtask 2 $32,798.80 $15,206.80 $17,592.00

Subtask 3 $7,838.17 $3,991.37 $3,846.80 Subtask 4 $726.77 $149.27 $577.50 Subtask 1,5 $7,685.31 $7,685.31 $0.00 Subtask 6 $0.00 $0.00 $0.00

$49,049.05 $27,032.75 $22,016.30 $49,049.05

Cost Estimate Page 2 of 6 Cost Estimate

LEVEL OF EFFORT/EXPENSE WORKSHEET

SITE : Art Craft Cleaners SUBTASK: Soil Sampling and MAGS

DATE: 1/31/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Principal R.Klinger 2

Project Professional M. Hensley 4

Project Professional B. Dawson

Sr. Staff Professional K. Pierce

Staff Professional D. McGill

Staff Professional M. Rommer 13

TOTAL LABOR 142

VEHICLE TYPE RATE UNIT USEAGE

Truck KP $120.00 Day 4 $480.00 Truck DM $480.00 Week 1 $480.00 Truck BD(2) + MR (1) $120.00 Day 3 $360.00

Subtotal $1,320.00

TOTAL VEHICLE $1,320.00

PER DIEM STAFF RATE UNIT USEAGE

K. Pierce Hotel $96.00 Day 4 $384.00 Meals $36.00 Day 4 $144.00

TOTAL PER DIEM $528.00

SUBCONTRACTOR COSTS

NAME PURPOSE COST

Other GeoView $900.00 $900.00

Subtotal $900.00

TOTAL SUB $900.00

LABORATORY COSTS

PARAMETER RATE # SAMPLES #QAQC

VOHs 11 borings, 5 intervals $73.00 55 0 $4,015.00 VOHs SPLP + Prep (assumed half) $118.00 27 0 $3,186.00

TO-15 - GAS $200.00 9 0 $1,800.00

Subtotal $9,001.00 Fast Turnaround Charges Percent

1 Week (SBs) 20% $73.00 55 $803.00 1 week (Air) 20% $200.00 9 $360.00

Subtotal $1,163.00 Shipping

Large Cooler (25 to 50 lbs) $150.00 5 $750.00 Subtotal $750.00

TOTAL LAB $10,914.00

EQUIPMENT ITEM RATE COSTING UNIT USEAGE TOTALS

Drilling Related

Soil Vapor Sampling Kit $290.00 Day 2 $580.00 Soil Sampling Kit (Through Concrete $235.00 Day 3 $705.00

Subtotal $1,285.00 Analytical Related

Encore Samplers $16.00 Each 55 $880.00 Subtotal $880.00

IDW Related Drum $100.00 Drum 2 $200.00

Subtotal $200.00 Expendables

$40.00 Day 5 $200.00 Subtotal $200.00

Other GPS $175.00 Day 1 $175.00 Vacuum Gauges $19.00 Day 2 $38.00 Differential Pressure Gauge $18.00 Day 2 $36.00 Regenerative Blower $180.00 Day 2 $360.00 Air Flow Meter $33.00 Day 2 $66.00 Portable Generator $250.00 Day 2 $500.00 MAGS Well Supplies $100.00 Total 1 $100.00

Subtotal $1,275.00

TOTAL EQUIPMENT $3,840.00

Mob/demob (1 hr/day x 1 days = 1 hr); Soil coring and sampling (6 locations; 12 hr)

Evaluating and interpreting field data

Preparation of soil and MAGS results figures

Procure new site access agreement (4 hr); Property owner, tenant, and off-site property owner notifications (1 hr); Mob/demob (1 hr/day x 2 day - 2 hr); MAGS well locating and status evaluation (2 hr); Marking new boring locations (2 hr); Oversee utility locating (4 hr);

Evaluating and interpreting field data (2 hr); Prepare field package (1 hr)

Mob/demob (8 hr rount trip to Jax + 1 hr/day x 3 day = 11 hr); Soil coring and sampling (5 locations; 10 hr); MAGS well installation (1 wells; 2 hr); MAGS equipment setup (0.5 hr/well x 9 wells = 5 hrs); MAGS testing (9 wells; 18 hr)

Field preparation (1 hr); Mob/demob (1 hr/day x 5 days = 5 hr); Soil coring and sampling (11 locations; 22 hr); MAGS well installation (1 wells; 2 hr); MAGS equipment setup (0.5 hr/well x 9 wells = 5 hrs); MAGS testing (9 wells; 18 hr); Interior as-built generation and exterior location surveying (2 hr); IDW management (1 hr); sample management/shipping (1 hr);

Prepare field package (2 hr)

2/3/2023 Page 3 of 6 Subtask 2

SUBTASK: Groundwater Sampling

DATE: 1/31/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Project Professional B. Dawson 3

Staff Professional D. McGill

TOTAL LABOR 42

VEHICLE TYPE RATE UNIT USEAGE

Truck $120.00 Day 4 $480.00 Subtotal $480.00

TOTAL VEHICLE $480.00

LABORATORY COSTS

PARAMETER RATE # SAMPLES #QAQC

VOHs $73.00 18 0 $1,314.00

Subtotal $1,314.00 Fast Turnaround Charges Percent

1 Week 20% $73.00 18 $262.80 Subtotal $262.80

Shipping Large Cooler (25 to 50 lbs) $150.00 1 $150.00 Small Cooler (0 to 25 lbs) $110.00 2 $220.00

Subtotal $370.00

TOTAL LAB $1,946.80

EQUIPMENT ITEM RATE COSTING UNIT USEAGE TOTALS

Analytical Related

Groundwater Sampling Kit $290.00 Day 4 $1,160.00 Subtotal $1,160.00

IDW Related Drum $100.00 Drum 1 $100.00

Subtotal $100.00 Expendables

$40.00 Day 4 $160.00 Subtotal $160.00

TOTAL EQUIPMENT $1,420.00

Property owner and tenant notifications (1 hr); Evaluating and interpreting field data (1 hr);

Prepare field package (1 hr)

NAM: Field preparation (1 hr); Mob/demob (1 hr/day x 3 day = 3 hr); DTW measurement collection (3 hr); Instrument calibration (0.5 hr/day x 3 days = 2 hr); Sampling 18 monitoring wells @ 1.5 hrs each (27 hr); IDW management (1 hr); Sample management/shipping (1 hr); Prepare field package (1 hr).

2/3/2023 Page 4 of 6 Subtask 3

SUBTASK: IDW Management

DATE: 1/31/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Project Professional B. Dawson 1

TOTAL LABOR 1

SUBCONTRACTOR COSTS

NAME PURPOSE COST

IDW

Hulls $525.00 $525.00

Subtotal $525.00

TOTAL SUB $525.00

Review and signature of waste profile and manifest, including pickup coordiation

2/3/2023 Page 5 of 6 Subtask 4

SUBTASK: SSAR

DATE: 1/31/2023

LABOR CATEGORY *PROVIDE TIME REQUIRED FOR EACH PERSON

STAFF-TITLE WORK DESCRIPTION HOURS

Principal R. Klinger 2

Project Professional M. Hensley 5

Project Professional B. Dawson 4

Staff Professional D. McGill 30

Administrative Assistant P. Gallagher 1

TOTAL LABOR 42

Report formatting and PDF compilation

Develop recommendations and path forward

SSAR figure preparation

SSAR preparation and PG Seal

SSAR preparation

2/3/2023 Page 6 of 6 Subtask 5

1200 Riverplace Boulevard, Suite 710 Jacksonville, Florida 32207

PH 904.858.1818

FAX 904.396.1143

www.geosyntec.com

3 February 2023

Ms. Brittany Plyler Florida Department of Environmental Protection 2600 Blair Stone Road, MS 4520 Tallahassee, Florida 32399-2400

Subject: Scope of Work and Level of Effort – Supplemental Site Assessment Art Craft Cleaners 1630 University Boulevard South

Jacksonville, Duval County, Florida 32216 FDEP Site ID No. ERIC_4584

Dear Ms. Plyler, Geosyntec Consultants, Inc. (Geosyntec) has prepared this Scope of Work and Level of Effort (LOE) for supplemental site assessment activities following cessation and decommissioning of drycleaning activities at the Art Craft Cleaners site (Site; ERIC_4584) located in Jacksonville, Florida (ERIC_4584). Geosyntec prepared this LOE based on the discussions during the 30 January 2023 teleconference with FDEP. A description of task breakdown for supplemental assessment field activities and report preparation is provided below.

Prior to the completion of supplemental assessment activities, Geosyntec will obtain a signed access agreement with the current property owner, Shreeji 1630, LLC, who purchased the source property associated with the Site from Minal Patel on 19 December 2023 for $350,000. Subtask 2 includes effort to coordinate and obtain a current, signed access agreement for the subject Site.

Conversations with the new property owner indicate that the Site will be redeveloped as a convenient store and the new tenants are scheduled to commence interior redevelopment activities on Saturday, 11 March 2023.

Subtask 1 – Project Management

Subtask 2 – Soil Sampling and Modified Active Gas Sampling (MAGS)

Subtask 2 includes costs for Geosyntec personnel to mobilize to the Site to observe a private underground utility survey as well as locate, uncover, and evaluate historical soil vapor extraction wells for use during the proposed MAGS testing. Geosyntec personnel will also conduct soil sampling at up to 11 locations (SB-14 through SB-23 and MAGS009) as presented on Figure 1.

Based on an assumed depth-to-water (DTW) of 7 feet below land surface (ft BLS), up to five soil samples (0.5, 2, 4, 6, and 8 ft BLS or water table) will be collected from each of the 11 proposed soil sample locations (55 total samples). Soil samples will be collected by hand auger and a concrete core drill will be used to access soil under the building slab (concrete) and driveway/parking lot (asphalt). Samples will be analyzed on a 1-week turnaround time (TAT) for the presence of volatile organic halocarbons (VOHs) via Environmental Protection Agency (EPA) Method 8260 by a National Environmental Laboratory Accreditation Program (NELAP) accredited, fixed-base laboratory. Soil samples will be screened with a photo-ionization detector (PID) organic vapor analyzer. Supplemental soil samples will be collected from each location and depth interval (via Encore samplers) for analysis of VOHs by the synthetic precipitation leaching procedure (SPLP) should VOH concentrations exceed the leachability-based soil cleanup target levels. For budgetary purposes, it is assumed that half (27) of the proposed soil samples will be analyzed by SPLP for VOHs. Exterior soil samples will be surveyed with a global positioning system; interior sampling locations will be transcribed using as-builts based on Site features that will be retained following interior renovations.

Upon completion of soil sampling activities at the boring located near the northern wall of the former boiler room, the boring will be backfilled with a MAGS well. The proposed MAGS well will be constructed of 2-inch (in.) diameter Schedule 40 polyvinyl chloride (PVC), installed by hand auger to a depth of approximately 6 ft BLS (or 1-ft above the static water level if the depth to groundwater is different than historically observed). The MAGS well will be installed with 1-ft of riser and 5-ft of 0.01-in. slotted well screen extending from approximately 1 to 6 ft BLS. A 20/30 grade environmental sand filter pack will be placed from the bottom of the boring (top of water table at approximately 7 ft BLS) to the top of the well screen. The remaining annular space will be grouted to just below the top of casing. A temporary grout patch will be placed on top of a PVC cap that will be placed on each well to match existing grade and protect the well between installation and testing. The MAGS location will be transcribed using as-builts based on Site features that will be retained following interior renovations.

Each of the eight (8) existing historical MAGS wells and one proposed MAGS well (MAGS009) will be tested for a period calculated to remove one, 15-ft radius of soil vapor pore volume using a blower (Figure 2). Each test is expected to take approximately 1 hour. The vacuum and flow rates used at each MAGS well will be based on the results of a step test to be conducted at the new proposed interior MAGS well (MAGS009). The step test will take approximately 1 hour and include a minimum of three steps at increasing vacuums (-15, -25, and -35 inches of water [in- H2O]) to evaluate to evaluate optimum air flow rates. Vacuum will be monitored at adjacent MAGS wells during each individual test at approximate 15-minute intervals, as practical, during MAGS testing.

During testing, soil vapor will be monitored with an organic vapor analyzer equipped with a PID utilizing a 10.6 electronic volt lamp. Soil vapor samples will be collected at the end of each MAGS test using a batch-certified “clean” Summa canister provided by the NELAP accredited analytical laboratory. The soil vapor samples will be sent to a fixed-based laboratory for analysis of VOCs by the EPA TO-15 method on a 1-week TAT.

Geosyntec has included costs to generate one draft figure and draft table that summarize VOH laboratory analytical results from soil samples and one draft figure and draft table that summarize VOH laboratory analytical results from MAGS samples. These data will be provided to FDEP for evaluation and review of the final SVE piping layout within the building interior associated with a future interim source removal design.

Subtask 3 – Groundwater Sampling

Subtask 3 includes costs for Geosyntec personnel to mobilize to the Site to conduct groundwater sampling activities of Site monitoring wells. Prior to sampling, DTW measurements will be collected from Site monitoring wells to evaluate groundwater flow direction. The monitoring wells will be sampled using a peristaltic pump and passive diffusion bags (PDBs) in general accordance with FDEP Standard Operating Procedures (SOPs), effective April 2018. Groundwater samples will be collected as part of natural attenuation monitoring and evaluation of the previously observed per- and polyfluoroalkyl substances (PFAS) groundwater impacts.

NAM Sampling

Groundwater samples will be collected from 18 monitoring wells in the monitoring well network to evaluate the current extent of the contaminant plume and source concentrations. Monitoring wells to be sampled include eight (8) shallow monitoring wells (PZ01 through PZ03, MW01, SMW01 through SMW03, and SMW05), six (6) intermediate monitoring wells (IMW01 through IMW06), and four (4) deep monitoring wells (DMW01 through DMW04) using conventional low-flow purging techniques. The samples will be stored on ice and shipped to a NELAP approved, fixed-based analytical laboratory under chain of custody for analysis of VOHs by EPA Method 8260 under a 1-week TAT.

PFAS Sampling

PFAS screening activities were conducted at the Site in October 2021. Exceedances of the provisional groundwater cleanup target level was observed at monitoring wells MW-01 and IMW-

03. Due to the limited nature of the initial screening efforts (three wells sampled), an expanded PFAS sampling plan has been included in Subtask 3 that includes sample collection from five (5) additional monitoring wells located downgradient and side-gradient of the observed groundwater impacts as outlined in Table 1 below and illustrated on Figure 3.

Table 1. PFAS Screening Sample Locations

Deep Monitoring Well

Well ID Well Diameter

(inches)

Screened Interval (ft BLS)

Rationale for Sampling

SMW-03 2 5-20 Downgradient Site boundary, shallow zone

SMW-05 2 5-20 Downgradient off-Site, shallow zone

IMW-04 2 37-42 Downgradient off-Site, intermediate zone

IMW-05 2 38-43 Side gradient off-Site, intermediate zone

IMW-06 2 35-40 Downgradient toe off-Site, intermediate zone

PFAS samples will be collected using low-flow purging via a peristaltic pump in accordance with draft SOPs for PFAS sampling developed by FDEP and the SOPs for PFAS sampling prepared by Geosyntec for use at FDEP’s Site Investigation Section firefighting training facilities. PFAS free water will used to decontaminate the water level meter between sampling wells.

Geosyntec understands that the FDEP laboratory will analyze the five (5) groundwater samples for PFAS constituents, and the FDEP will ship the sampling kits to Geosyntec. Based on the location of the Site, Geosyntec anticipates shipping the samples to the FDEP laboratory. Geosyntec assumes that the FDEP laboratory will provide return shipping labels with the sampling kits.

Subtask 4 – IDW Management

Geosyntec will containerize soil and groundwater investigation derived waste (IDW) in two 55-gallon steel drums pending off-Site transportation and disposal. Bid costs prepared by the waste disposal companies are attached (Attachment A). Based on the bids, Geosyntec recommends selecting Hull’s Environmental Services (Hulls) to haul and dispose of IDW under the existing non-hazardous waste profile for VOHs. It is anticipated that the previous provided IDW composite sample results for VOHs by EPA Method 8260B is sufficient for purposes of verifying the existing profile with Hulls. In addition to the VOHs sampled for, the PFAS results will be used to develop a separate PFAS profile. Recent experience with Hulls indicates low-level PFAS detections in groundwater can still warrant disposal as non-hazardous waste under the current profile. If PFAS are detected at significantly higher concentrations, then a work change directive will be prepared to increase disposal costs.

Subtask 5 – Supplemental Site Assessment Report

Following completion of field activities, Geosyntec will proceed with the preparation and submittal of a supplemental site assessment report (SSAR) documenting assessment activities and summarizing analytical results. This subtask includes costs to generate a SSAR that summarizes the analytical results of the assessment activities outlined above and complies with the requirements of Chapter 62-780.600, Florida Administrative Code.

Subtask 6 – PFAS Deliverable

Geosyntec will prepare an email deliverable with attachments including one figure with groundwater analytical results for PFAS (showing PFOA, PFOS, and PFOA + PFOS concentrations for each well sampled and no isoconcentration lines), certified analytical laboratory report, and field forms including equipment calibration logs, groundwater sampling forms, and an IDW drum log. The email deliverable will be submitted to the FDEP within two working days of receipt of the final certified analytical laboratory report from the FDEP laboratory. Geosyntec assumes the final analytical laboratory report will be emailed by the FDEP laboratory to Ann Sava (asava@geosyntec.com) after the report is finalized. The email deliverable will be submitted to Evan Miller, and additional FDEP staff will be copied including Kelly Crain, Aaron Cohen, Jen Farrell, and Breck Dalton.

SUBCONTRACTOR EVALUATION

Geosyntec obtained three bids from licensed and qualified utility locating and IDW transportation and disposal firms; a cost comparison is provided in Attachment A. Geosyntec recommends the following subcontractors based on lowest cost among the qualified bidders:

Underground utility locating – GeoTek Services

IDW transportation and disposal – Hulls Environmental Services

Deliverable and Invoicing Schedule:

Subtask Deliverable Deliverable Due Date

Invoice Amount

Field deliverable for soil sampling and

MAGS with summary figures and tables 2/24/23 $32,527.57

3 Field deliverable for groundwater sampling 3/3/23 $8,798.67

4 Submittal of IDW Manifest 3/17/23 $713.78

1, 5 Submittal of Supplemental Site Assessment

Report 4/28/23 $7,874.99

Submittal of email with 1 table, 1 figure, field forms, and certified lab report 3/10/23 $1,234.44

Total $51,149.45

Geosyntec appreciates the opportunity to provide this proposal and cost estimate to you and the FDEP. Please contact us if you have any questions or require additional information.

Sincerely, Blaine Dawson, P.G.

Project Geologist

Todd K. Kafka, P.G.

Sr. Principal Hydrogeologist

Attachments A – Subcontractor Cost Evaluation and Quotes

BCDawson Oval

BCDawson Text Box Proposed soil borings (11)

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Oval

BCDawson Callout Turn into MAGS well when done sampling

CANOPY

C

LO

TH

E

S R

A C

K

C

LO

TH

E

S R

A C

K

C O

U N

TE

R

C O

U N

TE

R

C

LO

TH

E

S R

A C

K

C

LO

TH

E

S R

A C

K

CLOTHES

RACK

SPOTTING

BOARDS

PRESS

DRESS

PRESSPRESSPRESSPRESS

PRESSPRESS

P R

E S

S

SPOTTING

BOARD

DRY

CLEANING

MACHINE

COMPRESSOR

COMPRESSOR

KLEEN-RITE

MISTER ON

WHEELS

WATER TANK

SEPARATOR

SEWER PIPE

CONNECTION

PUMPS ON

SHELF

WASHING

MACHINE

DRAIN BOX

BOILER

STORAGE

PRESS

LAUNDRY CART STORAGE

CHEMICAL

CONTAINMENT

PAN

SIDEWALK

S

ID

E W

A

LK

ATLANTIC UNIVERSITY CIRCLE

UN

IV

ER

SI

TY

B

OUL

EV

AR

D

SO

UT

H

OVERHANG

WOODY'S BAR-B-Q

CANOPY

CANOPY

DRIVE THRU

PROPERTY

BOUNDARY

4' SLIDING

GLASS DOOR

4' SLIDING

GLASS DOOR

SI

DE

W

AL

K

GRASSSTORM

DRAIN

FIRE

HYDRANT

GRA

SS

LANDSCAPE

POWER

POLE

M

SEWER

MANHOLE

S

ID

E W

A

LKSEWER LIFT

STATION

WOODY'S BAR-B-Q

STORAGE

POSSIBLE

FLOOR DRAIN

LOCATION

POSSIBLE

FLOOR DRAIN

LOCATION

FORMER

FILTER STORAGE

POWER

POLE

POWER

POLE

WATER

METER

WATER

METER

E/T

W

S

OHE

W

WE/T

E /T

W

W

S

E/T

E/T

E/T

E /T

E/T

G

G

P

UNK

S

PL

FO

C

W

W

W

W

W

W

E /T

MW-01

SMW02

VEW01

VEW02

VEW03

VEW06

VEW05

VEW04

VEW08

VEW07

N

WATER LINE

OVERHEAD ELECTRIC LINE

ELECTRIC/TELEPHONE LINE

SEWER LINE

W

OHE

E/T

S

FORMER POWER LINE FOR SIGN

UNKNOWN UTILITY LINE

P

UNK

POWER TO LIFT STATION

GAS LINE

PL

G

FIBER OPTIC CABLE LINEFOC

REFERENCES:

1. BASE MAP TAKEN FROM CADD FILE ORIGINALLY PREPARED

BY CB&I ENVIRONMENTAL & INFRASTRUCTURE, INC.

TITLED "FACILITY LAYOUT AND UTILITY MAP", CADD FILE No.

1362B21, PROJECT No. 151362, FIGURE 3, DATED 1/13/2015.

Figure:

NOVEMBER 2015

FACILITY LAYOUT

AND UTILITY LOCATION MAP

ART CRAFT CLEANERS

1630 UNIVERSITY BOULEVARD SOUTH

JACKSONVILLE, DUVAL COUNTY, FLORIDA

JACKSONVILLE, FL

0 20' 40'

SCALE IN FEET

LEGEND:

VAPOR EXTRACTION WELL LOCATION

(FORMERLY MAGS WELLS)

BCDawson Oval

BCDawson Oval

BCDawson Text Box Proposed MAGS well installation (1)

BCDawson Callout

MAGS009

Atlantic Boulevard

U n iv e rs it y B o u le v a rd S o u th

R iv e r

H il ls

D ri v e

A tl a n ti c

U n iv e rs it y C ir c le

PZ-03 (5-15)

PZ-02 (5-15)

PZ-01 (5-15)

SMW-01 (5-20)

SMW-02 (5-20) SMW-03 (5-20)

SMW-05 (5-20)

IMW-01 (29-34)

IMW-03 (36-41)

IMW-02 (36-41)

IMW-05 (38-43)

IMW-04 (37-42)

IMW-06 (35-40)

DMW-03 (52-57)

DMW-04 (50-55)

SMW-04 (5-20)

DMW-02 (50-55)

DMW-01 (47-52)

MW-01 (4.5-14.5)

Path: (Titusville-01\DATA) T:\0GIS\FR8355_ArtCraft\MXDs\PFAS_Results_202111.mxd 08 November 2021. Last Edited by: mhensley

0 100

Feet

³ Art Craft Cleaners

1630 University Boulevard South Jacksonville, Duval County, Florida

Groundwater PFOS + PFOA Analytical Summary

Figure

Jacksonville, FL November 2021

Notes:

1. ft BLS indicates feet below land surface.

2. Results are provided in nanograms per liter (ng/L).

3. PFOS + PFOA indicates the summation of perfluorooctanesulfonic acid (PFOS) and perfluorooctanic acid (PFOA).

4. The Florida Department of Environmental Protection provisional groundwater cleanup target level (GCTL) for PFOS and PFOA is 70 ng/L.

5. Blue shaded, bold text indicates an exceedance of the Florida Department of Environmental Protection provisional groundwater cleanup target level (GCTL) of 70 ng/L.

6. Wells were digitized from figure orginally prepared by CB&I Environmental and Infrastructure, Inc., titled "Monitoring Well and Deep Soil Boring Network Map", Project No. 151362, ACAD File No. 1362B28, Dated 01/13/2015.

7. Parcel boundaries obtained from Florida Department of Revenue GIS and Cadastral Mapping website, shapefile duval_2021_pin.

8. 2020 Aerial Source: Florida Department of Transportation Surveying and Mapping

Office APLUS website.

Legend

&< Shallow Monitoring Well Location showing screen interval (ft BLS)

&< Intermediate Monitoring Well Location showing screen interval (ft BLS)

&< Deep Monitoring Well Location showing screen interval (ft BLS)

&< Abandoned Monitoring Well Location showing screen interval (ft BLS)

Approximate Site Boundary

Surrounding Property Parcel Boundary

Date PFOS PFOA PFOS + PFOS

10/13/2021 150 50 200

MW-01 (4.5 - 14.5)

Date PFOS PFOA PFOS + PFOS

10/13/2021 40 21 61

IMW-01 (29 - 34)

Date PFOS PFOA PFOS + PFOS

10/13/2021 78 29 107

IMW-03 (36 - 41)

BCDawson Rectangle

BCDawson Rectangle

BCDawson Rectangle

BCDawson Rectangle

BCDawson Rectangle

BCDawson Rectangle

BCDawson Text Box PFAS GW Samples

ATTACHMENT A

SUBCONTRACTOR COST

EVALUATION AND QUOTES

1 Lump Sum

3 Drum $175 3 Drum $215 3 Drum $191

1 Stopage $500

Note: The selected subcontractor is highlighted in yellow.

Subcontractor Evaluation: Art Craft Cleaners, Jacksonville, Florida

No Bid - Not InterestedNo Bid - Schedule Prohibited

Hepaco, LLC

PRIVATE UTILITY LOCATORS

GPRSGeoView GeoTek

$525.00 $645.00 $1,073.81

$900.00 N/A N/A

IDW DISPOSAL

Hulls UES

A Geophysical Services Company

5709 First Avenue South Tel.: (727) 209-2334 St. Petersburg, FL 33707 Fax: (727) 328-2477

January 31, 2023

Mr. Blaine Dawson, PG GeoSyntec Consultants 1200 Riverplace Boulevard Suite 710 Jacksonville, FL 32207

Subject: Proposal to Perform a Utility Designation Study

Art Craft Cleaners Site Jacksonville, Florida GeoView Proposal Number: 10348p

Mr. Dawson, The purpose of this letter is to transmit a proposal to complete a geophysical investigation at the subject site. This proposal is in response to your request for proposal made during your recent conversations with our office. GeoView, Inc.

appreciates the opportunity to provide our services on this project. We look forward to hearing from you soon.

Sincerely, GEOVIEW ASSOCIATES, INC.

Stephen Scruggs, P.G.

Senior Geophysicist Florida Professional Geologist Number 2470 Enclosure

Proposal This document shall serve as a proposal for work to be performed by

GeoView Associates, Inc. (GeoView) for GeoSyntec Consultants.

Description of Site

The project site is referred to as the Art Craft Cleaners Site and is located at 1630 University Blvd S in Jacksonville, Florida. The purpose of the geophysical survey will be to determine the location of underground utilities within a 10 feet radius of 11 proposed borings. The location of the study area is provided on Figure 1 (page #6).

Scope of Work The geophysical survey will be conducted using ground penetrating radar

(GPR) and conventional electromagnetic (EM) pipe and cable locators. The GPR survey will be conducted using either a Mala and/or a GSSI GPR system. The appropriate GPR antenna configuration and time range and processing parameters will be determined in the field by the project manager.

The EM survey will be performed using a Subsite 95R and/or a Radiodetection RD (8000, 8100 or 8200) system. As appropriate, the EM survey will be conducted using both passive and active modes. The passive mode is used to find cables and conduits carrying live power (50-60 Hz) and communication (29-33Hz) signals. For the active mode survey, a current is transmitted directly or broadcast into using electromagnetic induction a metal pipe or conduit and the path of the pipe/conduit is identified by following the signal with a portable receiver.

The active mode is used to trace out cast iron pipes, metal water and sewer lines, utilities that have trace wires, and inactive power and communication lines.

Presentation of Results The location and estimated depths of underground utilities or any other identified structures shall be indicated on the ground surface using spray paint or other methods as specified by GeoSyntec Consultants. No report shall be prepared.

Compensation Cost to complete the survey will be $900. If a scaled AutoCAD site map is required to document the study results, an additional fee of $200 will be added.

This price is inclusive of all charges associated with the project. Unless otherwise agreed upon, GeoView shall be compensated for all services within 30 days of invoice date. GeoView shall be paid in full regardless of whether the results of the geophysical survey are what GeoSyntec Consultants anticipated. If it is determined during the survey that the geophysical survey will not achieve the objectives of the project, GeoSyntec Consultants will immediately be notified. If a decision is made to discontinue the survey, only charges for time and materials costs to that point will be submitted.

These prices are based upon GeoView being able to access the site during normal business hours, Monday through Friday. It is also based upon the assumption that no site-specific training or drug testing will be required. If there are any such requirements, additional costs will be incurred.

Requirements of Client GeoSyntec Consultants will provide a scaled map and digital file, if available, of the project site showing the boundaries of the project site, areas of specific concern and pertinent landmarks. GeoSyntec Consultants will also supply all available information regarding the presence and history of underground utilities at the project site (see limitations for further discussion). Unless otherwise requested, GeoSyntec Consultants will be responsible for the coordination of site access, traffic control, clearing of onsite obstructions or any other logistical consideration necessary to conduct the survey. If any test drilling, monitor well installation or other excavation activities are planned it will be the responsibility of GeoSyntec Consultants to submit a notification (dig ticket) to the appropriate 811 One-Call agency. It is recommended that such notification be filed sufficiently in advance so that GeoView will have the opportunity incorporate the 811 findings into their results.

Limitations The objective of the geophysical survey is to determine the presence and configuration of underground utilities. However, the geophysical response of these features may be highly complex depending upon on the physical characteristics of the underground utilities, the electrical properties of the surrounding soils, the depth of burial of the utilities, and the proximity of the utilities to each other.

GeoView shall conduct the geophysical survey using the most “up-to-date” geophysical equipment in a manner consistent with the level of care and skill ordinarily exercised by members of the geophysical profession practicing in the same locality under similar conditions. GeoView’s utility locating personnel are all certified GPR and conventional pipe and cable locator operators with extensive in-house training.

It is acknowledged that GeoView is not an 811 Sunshine One-Call or equivalent utility mark-out service. GeoView does not have access to any utility-related records for either public or private properties. It is the responsibility of GeoSyntec Consultants to obtain such records and provide to GeoView prior to the site investigation. GeoView will use these records during the site investigation and report to GeoSyntec Consultants any utilities that are shown on the site records but cannot be confirmed by GeoView. GeoView will not mark on the ground surface any utilities which it cannot confirm.

GeoView shall only be liable for the successful locating of underground utilities or any other underground structures whose presence is both known and indicated on site maps to be provided prior to the performance of the geophysical survey. Every attempt will be made to locate both known and unknown utilities within the survey area. However, GeoView will only be liable for utilities whose presence is known prior to the survey. GeoSyntec Consultants accepts that due to the inherent limitations of non-intrusive geophysical technologies GeoView cannot be held liable for damages to utilities that cannot identified using non-intrusive technologies.

GeoSyntec Consultants accepts that a non-intrusive utility designation study does not replace the need to employ widely accepted industry safety standards for subsurface work. Concerning the installation of well or test borings this standard of care includes post-holing or hand auguring at the planned test locations to the minimum depth at which underground utilities are anticipated at the project site. If absolute confirmation is needed to a specified depth that underground utilities are not present at a planned work location GeoView can provide vacuum excavation services. Pricing for such services is available upon request.

When GeoSyntec Consultants is working around indicated utilities, a minimum of 2 ft clearance from either side of the marked utility will be maintained. Unless otherwise indicated, a minimum vertical clearance of +/- 20 percent of the indicated depth shall also be maintained. GeoSyntec Consultants maintains the responsibility for manually exposing any indicated underground utility for absolute confirmation. Authorization and scheduling of the project is considered acceptance of these terms and conditions.

Other Terms and Conditions Additional Insured: If requested, GeoSyntec Consultants will be named as an additional insured with respect to the services to be performed under this agreement.

Confidentiality: GeoView shall not directly or indirectly disclose to any third person information regarding the results of the geophysical investigation prior to obtaining written permission from GeoSyntec Consultants.

Agreement: This agreement represents the entire agreement between the parties and may only be modified in writing signed by both parties.

Governing Law: This agreement shall be deemed to have been made in the place of performance of the Geophysical Services and shall be governed by, and construed in accordance with the laws of the state in which the geophysical services were provided. Any controversy or claim arising out of this agreement, or breach thereof, shall be settled by binding arbitration administered by the American Arbitration Association under its Construction Industry Arbitration rules. Judgment on the award rendered by the arbitrator(s) may be entered in any court having jurisdiction thereof.

Indemnity: GeoView agrees to indemnify, protect and hold harmless GeoSyntec Consultants from and against all liabilities, claims or demands of every kind of injury, including death, or damages to any person or property related in any way to GeoView’s performance of this agreement, except to the extent such liabilities, claims or demands are caused by the negligence or willful misconduct of GeoSyntec Consultants.

Figure 1 – Project Site Location Proposed Borings Shown in Blue

GEOVIEW ASSOCIATES, INC.

PROPOSAL ACCEPTANCE SHEET

Project Name: Art Craft Cleaners Site Project Location Jacksonville, Florida GeoView Proposal #: 10348p Proposal Date: January 31, 2023 Description of Services Provide Utility Designating Services Project Cost: $900 – see compensation page 2 Payment Terms: Payable within 30 days of receipt of invoice

CHARGE INVOICE TO THE ACCOUNT OF:

Client: GeoSyntec Consultants Address: 1200 Riverplace Boulevard Suite 710

Jacksonville, FL 32207 Attention: Blaine Dawson, PG Phone (Office): (904) 450-4271 Phone (Cell): (509) 433-1195 Email: BCDawson@Geosyntec.com

FOR APPROVAL OF CHARGES:

Firm:

Address:

Phone No.: Fax No:

Attention:

Special Instructions and/or Mutually Agreed Upon Changes to the Proposal:

In witness thereof, the parties hereto have made and executed this Agreement

Client: GeoView Associates, Inc.

Signature

By: By: Steve Scruggs, P.G.

Title: Title: Senior Geophysicist

Date Signed: Date Signed: January 31, 2023

General Description of Geophysical Methods Ground Penetrating Radar (GPR)

The GPR survey will be conducted using a Mala or GSSI GPR system. The survey will be conducted with either a 500, 400 or 250 mega-Hertz antenna. The appropriate antenna will be determined in the field by the project manager. GPR will be able to provide both the position and estimated depth of both metallic and non-metallic underground utilities.

The ability of GPR to resolve a particular utility will be controlled by the following factors: 1) Depth of penetration of the GPR signal, 2) Depth of burial and diameter of the underground utility and 3) Electrical contract between the underground utility and the surrounding soils and 4) The complexity of the utility layout at the site. Due to one or a combination of these factors the GPR may not be able to identify all the utilities at the site. The diameter or composition of utilities cannot be accurately determined using GPR, though can be estimated. Estimates of burial depth are typically accurate to within +/- 20 percent, more accurate depths are possible if invert elevations for some on-site utilities are known.

Conventional Electromagnetic Pipe and Cable Locators

A Radiodetection System is used to locate underground utilities using conventional means. The system consists of a dual-function receiver and transmitter. The receiver can be operated in two modes: active and passive. In the passive mode the receiver detects the presence of underground utilities that are energized by a 60-Hertz or other known frequency. These utilities can either be those actually carrying electrical power or those utilities that are both metallic and sufficiently close to the electrical lines to have an electrical field induced within them.

In the active mode, the transmitter deliberately induces an electrical current into the utility. The frequency of this field can be varied from 512 Hertz to 200 kilohertz. The electrical field is induced using a transmitter which is either directly attached to the utility, placed on or above the utility or attached to an induction coil which is placed around the utility. Depths of underground utilities can be determined when the EM equipment is being used in the active mode. Depths are typically accurate to within 10-15 percent of the total utility depth.

Blaine Dawson

From: GeoTek Services <sales@geotekservices.com> Sent: Tuesday, January 31, 2023 7:56 PM To: Blaine Dawson Subject: Re: RFQ - Utility Locating Services

Follow Up Flag: Follow up Flag Status: Flagged

CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. If you have any suspicion, please confirm with the sender verbally that this email is authentic. If you suspect fraud, click "Phish Alert Report."

Hello Blaine, sorry I cannot meet the schedule, already booked out this weekend.

Best Regards, Bud Connor GeoTek Services, LLC

On Tue, Jan 31, 2023 at 10:50 AM Blaine Dawson <BCDawson@geosyntec.com> wrote:

Good morning, If interested, please provide an estimate to locate (EM and GPR) at the Art Craft Cleaners site located at 1630 University Blvd S, Jacksonville, Florida. The attached figures illustrate the historically observed utilities and the 11 proposed sampling locations for utility locating. We will need a 20-ft by 20-ft area cleared at each location. The building has been gutted and all locations should be sufficiently clear for locating.

I apologize for the short notice but I would really appreciate your bids back by COB Today (31 January 2023). Please also provide your earliest availability to complete the work. The target date for completing the locate is next Monday, 6 February 2023. If unavailable that day, please let me know what days work the rest of this week, if available.

Feel free to contact me with any questions. Thank you for your time!

Thank you, Blaine Dawson, PG (FL,TN)

Senior Geologist

1200 Riverplace Boulevard

Suite 710

Jacksonville, FL 32207

Phone: 904-450-4271

Mobile: 509-433-1195 www.Geosyntec.com

This electronic mail message contains information that (a) is or may be LEGALLY PRIVILEGED, CONFIDENTIAL, PROPRIETARY IN NATURE, OR OTHERWISE PROTECTED BY LAW FROM DISCLOSURE, and (b) is intended only for the use of the Addressee(s) named herein. If you are not the intended recipient, an addressee, or the person responsible for delivering this to an addressee, you are hereby notified that reading, using, copying, or distributing any part of this message is strictly prohibited. If you have received this electronic mail message in error, please contact us immediately and take the steps necessary to delete the message completely from your computer system.

From: Blaine Dawson Sent: Wednesday, February 1, 2023 2:40 PM To: Laura Perez Subject: FW: RFQ - Utility Locating Services Attachments: Art Craft Cleaners_Site Maps.pdf

Importance: High

Good afternoon Laura, I wanted to follow up on the below request for quote. Please do let me know if GPRS is not interested or available in the opportunity. I appreciate your time regarding this!

Thank you, Blaine Dawson, PG (FL,TN)

Jacksonville, FL 32207 Phone: 904-450-4271

This electronic mail message contains information that (a) is or may be LEGALLY PRIVILEGED, CONFIDENTIAL, PROPRIETARY IN NATURE, OR OTHERWISE PROTECTED BY LAW FROM DISCLOSURE, and (b) is intended only for the use of the Addressee(s) named herein. If you are not the intended recipient, an addressee, or the person responsible for delivering this to an addressee, you are hereby notified that reading, using, copying, or distributing any part of this message is strictly prohibited.