United States Department of Agriculture Agricultural Research Service

STATEMENT OF WORK

Wasterwater System Improvements

Stuttgart National Aquaculture Center

(SNARC)

2955 Highway 130 E Stuttgart, AR 72160

Prepared by Joel Ledbetter

May 4, 2026

Statement of Work USDA, Agricultural Research Service

Project Description:

The USDA ARS SNARC needs wastewater discharge modifications to better comply with new

NPDES requirements while still meeting the operations needs of the facility. The project will consist of all work and materials to complete Harbor Environmental-Harbor Project Number L8247738 (appendix A).

All work must be done in compliance with ADEQ State Construction Permit Number AR0049352C

(appendix B). There shall be no deviation from the permitted plans and specifications unless the revisions have been submitted for review and written approval is received.

Summary of services:

The contractor will be responsible for providing all necessary equipment, materials, supplies, tools, transportation, unloading, and handling required for the proper installation and completion of this project.

The contractor will be responsible for the proper disposal of all the waste generated during their work.

The contractor will be responsible for developing a site safety plan and compliance with all applicable OSHA and EPA standards.

The contactor will compile and supply to the Contracting Officer Representative an Operations and Maintenance (O&M) Manual for all equipment installed.

The proposal will be presented in MS Word format, and the cost breakdown/analysis will be presented in MS Excel.

All work must meet ARS 242.1M “ARS Facilities Design Standards” for the defined scope of this project in addition to meeting all Local, State and Federal codes, and latest IBC codes. The document may be found at https://www.afm.ars.usda.gov/ppweb/pdf/242-01m.pdf.

Project Objectives The construction will include installation of a new outfall (Outfall 002), replacement of the tablet chlorinator with a new tablet chlorinator, installation of a tablet dechlorinator, re-routing piping to remove process wastewater from the wastestream (for recycling), and associated pumps and piping.

The contractor will provide and install the following elements:

1. Removal of existing chlorination station, reaction chamber and piping from sand filter outlet.

2. Installation of new piping from sand filter and connection to new chlorine disinfection system

3. Installation of new dichlorination system

4. Installation of new electromagnetic flow meter

5. Installation of sump sewage package

6. Installation of up to 200 feet of in-ground electrical service

7. Installation of piping to discharge point

8. Removal of old discharge piping to sewer sump.

9. Backfilling all disturbed ground to final grade https://www.afm.ars.usda.gov/ppweb/pdf/242-01m.pdf

Site Visit

Contractors are encouraged to visit the site and be escorted by a government representative to confirm locations, dimensions, and conditions of the project before a bid is submitted. The site visit shall be for the purpose of observing first-hand any conditions relevant to the completion of this project. No consideration will be given to claims based on lack of knowledge of existing conditions, except where Contract Documents make definite provisions for adjustment in cost or extension due to existing conditions not readily foreseeable.

Contractor must be registered in System for Award Management, (SAM), prior to submitting a bid.

Registration can be completed at www.sam.gov/portal/public/SAM

Utilization of Bio-Based Products

The contractor shall utilize products and material based from bio- based materials as applicable, (e.g. bio-based greases; bio-based hydraulic fluids, bio-based absorbents), to the maximum extent possible without jeopardizing the intended end use of detracting from the overall quality delivered to the end user. All supplies and materials shall be of a type and quality that conform to the applicable Federal Specifications and Standards. All supplies and materials to be used in the performance of work described herein are subject to the approval of the Contracting Officer. Products can be found at:

www.biopreferred.gov

Safety

The contractor will submit a Site Safety Specific Plan/Accident Prevention Plan in industry recognizable format to the Contracting Officer within 14 days of contract award. Contractor shall furnish a Site- Specific Safety Plan (SSSP) and the Government shall review the SSSP prior to the start any construction activities. SSSP shall be in typically accepted industry format.

Base Bid

Contractor shall perform the work as specified in the Statement of Work.

All proposals shall be in unlocked MS Word format and all cost proposals shall be detailed and presented in unlocked MS Excel format with formulas working.

Contractor Responsibilities

The project has a base bid to be performed per the following specifications:

1. The Contractor will verify all dimensions and existing site conditions prior to beginning work. No deviation from Harbor Project Number L8247738 is permitted without approval from the Arkansas Department of Health as outlined in approval letter dated October 16, 2025, attached (appendix C).

2. The Contractor shall keep work areas clean daily and take measures to control debris while work is being performed.

http://www.sam.gov/portal/public/SAM http://www.biopreferred.gov/

3. The Contractor is required to manage the project and consult with the Government prior to beginning all work phases.

4. The Contractor shall perform work in a manner that minimizes the impact of the work on Government operations, research, and functions.

5. The contactor will ensure all work is performed in such a manner as to not adversely affect daily operations of the facility and its workers.

6. The Contractor will provide daily reports of work performed to the COR.

7. The contractor shall remove and dispose of all construction related materials from all work areas daily and remove these waste materials from the site on a weekly basis.

8. The contractor must have a superintendent on the job site when crews are performing the installation work.

9. The contactor will provide their own restroom facility.

10. The contractor will perform commissioning of the new system and ensure it is operable.

11. The contractor will provide operation and maintenance manuals for all equipment installed.

Material / Submittals:

The material for the entire work shall include but are not limited to those detailed above necessary to successfully complete the project and deliver a functioning system as required. Submittals on all material used on this project shall be submitted to the Contracting Officer as noted in this document. Electronic submittals are acceptable otherwise three written submittals are required.

Installation Procedure:

Contractor will verify all dimensions and site conditions prior to beginning work. Contractor is required to provide labor, specified material, equipment, and other tools required to perform the job fully and completely. No Government equipment will be available for use by the contractor. The contractor shall always be responsible for protecting his work and ensuring the safety of his crew and ARS employees.

Upon completion of the project, the contractor shall remove from the premises all accumulated materials and rubbish caused by the project. Premises shall be left in a clean, orderly, and acceptable condition.

Damage to Property:

Any damage to the Government buildings, utilities, etc. caused as the result of the contractor’s activities shall be repaired or replaced to the satisfaction of the Government.

Inspection and Acceptance:

A government representative shall inspect and approve the work performed on this project. The Contractor shall schedule inspection a minimum of 10 days in advance, in writing, to the Contracting Officer.

Project Schedule:

The completion of this project shall not exceed 120 days from date of notice to proceed. A request for time extension must be submitted to the Contracting Specialist in writing. Each request must include specific and detailed reasons in support of the schedule alteration. Construction must begin on or before October 7, 2026.

Work Hours:

Contractor work hours shall be Monday through Friday, seven (7) A.M. to four (4) P.M. with the exception of Government holidays. Any changes to work schedule shall be submitted to Contacting Officer for written approval prior to schedule change.

Project Contacts

RESEARCH LEADER (RL)

Dr. Yulin Jia Phone: 870-672-6129

USDA, ARS, SEA

2890 HWY 130 East Stuttgart, AR, 72160 Email: Jia.yulin@usda.gov

ADMINSTRATIVE OFFICER (AO)

Raeann Braithwaite Phone: 870-672-8254

USDA, ARS, SEA

2955 Highway 130 East Stuttgart, AR 72160 Email: Raeann.braithwaite@usda.gov

SAFETY MANAGER and CONTRACTING OFFICER REPRESENTATIVE (COR)

Joel Ledbetter Phone: 870-672-8255

USDA, ARS, SEA

2955 Highway 130 East Email: joel.ledbetter@usda.gov Stuttgart, AR 72160

ENGINEERING PROJECT MANAGER

Garrett Hafemann P.E. Phone: 501-663-8800 Harbor Environmental 5800 Evergreen Drive Little Rock, AR 72205 mailto:Jia.yulin@usda.gov mailto:Raeann.braithwaite@usda.gov mailto:joel.ledbetter@usda.gov

Appendix A Harbor Project Number L8247738 (6 pages)

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STUTTGART NATIONAL AQUACULTURE

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SEPTEMBER 2025

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FOR

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ARKANSAS COUNTY

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ARKANSAS

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DATE

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DEQ PERMIT NO. AR0049352

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DEQ AFIN NO. 01-00135

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HARBOR PROJECT NUMBER

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(501) 663-8800

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ENVIRONMENTAL

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& SAFETY

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HARBOR

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RESEARCH CENTER - STUTTGART

ggreenway Approval Stamp

Date:

9-12-25

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ABBREVIATIONS

GENERAL NOTES

LEGEND

SHEET INDEX

SHEET# DESCRIPTION

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PROPERTY LINE

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UTILITY EASEMENT - PERMANENT

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OVERHEAD ELECTRIC

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CHAIN LINK FENCE

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RIGHT OF WAY

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POLE MOUNTED LIGHT

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FIRE HYDRANT (3 WAY)

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ELECTRICAL BOX

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TELEPHONE RISER

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BUILDING SETBACK LINE

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SANITARY SEWER

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SANITARY SEWER MANHOLE

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SANITARY CLEANOUT

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WATER METER

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WATER VALVE

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POWER POLE

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POWER POLE W/ TRANSFORMER

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GAS METER

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GAS VALVE

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STORMWATER GRATE INLET

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HANDICAP PARKING

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SIGN

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GAS LINE

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WATER LINE

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OVERHEAD WIRE MISC

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LANDSCAPE LIGHT

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FIBER OPTIC VAULT

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WOOD FENCE

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RAILING

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DIRECTION OF TRAFFIC

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STORM DRAIN

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STORMWATER MANHOLE

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CONTOUR - EXISTING (MAJOR)

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CONTOUR - EXISTING (MINOR)

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BARBED WIRE FENCE

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UTILITY EASEMENT - TEMPORARY

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OIL PIPELINE

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UTILITY EASEMENT - EXISTING

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UNDERGROUND ELECTRIC

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GUY WIRE

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IRON PIN FOUND

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IRON PIN SET - REBAR

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W/CAP (R.L.S. 1203)

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POWER POLE W/ LIGHT & TRANS

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CONTOUR - PROPOSED (MAJOR)

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CONTOUR - PROPOSED (MINOR)

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TRIBUTARY OR DITCH

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CREEK OR RIVER

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FIRE HYDRANT (2 WAY)

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AutoCAD SHX Text A AMPERE(S) AMPERE(S) AC ALTERNATING CURRENT ALTERNATING CURRENT AFF ABOVE FINISHED FLOOR ABOVE FINISHED FLOOR AHU AIR HANDLING UNIT AIR HANDLING UNIT AISI AMERICAN IRON AND STEEL AMERICAN IRON AND STEEL INSTITUTE AL ALUMINUM ALUMINUM ALY ALLOY ALLOY ANSI AMERICAN NATIONAL AMERICAN NATIONAL STANDARDS INSTITUTE APPROX APPROXIMATELY APPROXIMATELY ASA AMERICAN STANDARDS ASSOCIATION AMERICAN STANDARDS ASSOCIATION ASME AMERICAN SOCIETY OF MECHANICAL AMERICAN SOCIETY OF MECHANICAL ENGINEERS ASSY ASSEMBLY ASSEMBLY ASTM AMERICAN SOCIETY FOR TESTING AMERICAN SOCIETY FOR TESTING AND MATERIALS MATERIALS AVG AVERAGE AVERAGE AWG AMERICAN WIRE GAUGE AMERICAN WIRE GAUGE BLDG BUILDING BUILDING BOM BILL OF MATERIALS BILL OF MATERIALS BTM BOTTOM BOTTOM BTU BRITISH THERMAL UNIT BRITISH THERMAL UNIT C DEGREE(S) CELSIUS DEGREE(S) CELSIUS CCW COUNTER CLOCKWISE COUNTER CLOCKWISE CF CUBIC FEET / FOOT CUBIC FEET / FOOT CI CAST IRON CAST IRON CMU CONCRETE MASONRY UNIT CONCRETE MASONRY UNIT CO COUNTY COUNTY CONN CONNECTION CONNECTION CY CUBIC YARD(S) CUBIC YARD(S) CW CLOCKWISE CLOCKWISE DI DUCTILE IRON DUCTILE IRON DIA DIAMETER DIAMETER DIR DIRECTION DIRECTION DC DIRECT CURRENT DIRECT CURRENT DEG DEGREE(S) DEGREE(S) DIM DIMENSION DIMENSION DWG DRAWING DRAWING ELEC ELECTRICAL ELECTRICAL ELEV ELEVATION ELEVATION ENC ENCASEMENT ENCASEMENT EQL EQUAL EQUAL EQUIP EQUIPMENT EQUIPMENT EXIST EXISTING EXISTING F DEGREES FAHRENHEIT DEGREES FAHRENHEIT FT FOOT / FEET FOOT / FEET GAL GALLON(S) GALLON(S) GCI GRAY CAST IRON GRAY CAST IRON GIS GRAPHIC INFORMATION SYSTEM GRAPHIC INFORMATION SYSTEM HDPE HIGH-DENSITY POLYETHYLENE HIGH-DENSITY POLYETHYLENE HOR HORIZONTAL HORIZONTAL HWY HIGHWAY HIGHWAY ID INNER DIAMETER INNER DIAMETER IN INCH / INCHES INCH / INCHES IPF IRON PIN FOUND IRON PIN FOUND IPS IRON PIN SET IRON PIN SET ISO INTERNATIONAL ORGANIZATION FOR INTERNATIONAL ORGANIZATION FOR STANDARDS KSI KILOPOUNDS PER SQUARE INCHKILOPOUNDS PER SQUARE INCH

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1. PRIOR TO BEGINNING ANY TYPE OF CONSTRUCTION, THE CONTRACTOR SHALL CONTACT PRIOR TO BEGINNING ANY TYPE OF CONSTRUCTION, THE CONTRACTOR SHALL CONTACT THE UTILITIES INVOLVED AND MAKE ARRANGEMENTS FOR THE LOCATION OF THE UTILITIES TO BE MARKED ON THE SITE. THE CONTRACTOR SHALL MAINTAIN THE UTILITY LOCATION MARKINGS UNTIL THEY ARE NO LONGER NECESSARY. UNDER ARKANSAS STATE LAW, THE UNDERGROUND FACILITIES DAMAGE PREVENTION ACT REQUIRES TWO WORKING DAYS ADVANCE NOTIFICATION THROUGH THE ARKANSAS ONE-CALL SYSTEM BEFORE EXCAVATING USING MECHANIZED EQUIPMENT OR EXPLOSIVES (EXCEPT IN THE CASE OF AN EMERGENCY). THE ONE-CALL SYSTEM TELEPHONE NUMBER IS 1-800-482-8998 OR 811. THE CONTRACTOR IS ADVISED THAT THERE IS A SEVERE PENALTY FOR NOT MAKING THIS CALL. NOT ALL UTILITIES ARE MEMBERS OF THE ARKANSAS ONE-CALL SYSTEM. THE CONTRACTOR IS ADVISED TO CONTACT ALL NON-MEMBER UTILITIES AS WELL AS THE ONE-CALL SYSTEM. 2. THE CONTRACTOR IS RESPONSIBLE FOR ABIDING BY ALL STANDARDS AND REGULATIONS THE CONTRACTOR IS RESPONSIBLE FOR ABIDING BY ALL STANDARDS AND REGULATIONS AS ADOPTED BY FEDERAL, STATE, AND LOCAL REGULATIONS REGARDING THE PROJECT AND ALL FACETS THEREOF CONTAINED WITHIN THE BID DOCUMENTS. 3. THE CONTRACTOR IS RESPONSIBLE FOR COMPLYING WITH OSHA PERFORMANCE CRITERIA. THE CONTRACTOR IS RESPONSIBLE FOR COMPLYING WITH OSHA PERFORMANCE CRITERIA. 4. THE CONTRACTOR MAY NOT SCALE THE DESIGN DRAWINGS. THE CONTRACTOR MAY NOT SCALE THE DESIGN DRAWINGS. 5. THE CONTRACTOR IS RESPONSIBLE FOR VERIFYING FIELD CONDITIONS AND REPORTING THE CONTRACTOR IS RESPONSIBLE FOR VERIFYING FIELD CONDITIONS AND REPORTING ALL DISCREPANCIES TO THE ENGINEER OF RECORD. 6. THE CONTRACTOR IS RESPONSIBLE FOR CONSTRUCTION MEANS, METHODS, TECHNIQUES, THE CONTRACTOR IS RESPONSIBLE FOR CONSTRUCTION MEANS, METHODS, TECHNIQUES, SEQUENCES AND PROCEDURES, AND COORDINATING ALL WORK WITHIN THE CONTRACT DOCUMENTS. RELOCATION OR REMOVAL OF COMPONENTS SHALL BE COORDINATED WITH ALL TRADES BY THE CONTRACTOR. 7. ALL NECESSARY PERMITS, FEES, AND LICENSURE MUST BE INCLUDED IN THE BASE BID. ALL NECESSARY PERMITS, FEES, AND LICENSURE MUST BE INCLUDED IN THE BASE BID. 8. DIMENSIONS ARE NOT ADJUSTABLE UNLESS NOTED OTHERWISE WITH A ± SYMBOL. DIMENSIONS ARE NOT ADJUSTABLE UNLESS NOTED OTHERWISE WITH A ± SYMBOL. 9. ALL FITTINGS TO BE FURNISHED WITH MEGALUGS.ALL FITTINGS TO BE FURNISHED WITH MEGALUGS.

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REVISION CLOUD

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REVISION TAG

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KEYNOTE

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CUT SECTION

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ELEVATION VIEW

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DETAIL CALL-OUT

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SHEET INDEX, NOTES, ABBREVIATIONS, AND LEGEND

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VICINITY MAP

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EXISTING SITE MAP

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WASTEWATER SYSTEM IMPROVEMENT PLAN

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GENERAL DETAILS

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STUTTGART

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RESEARCH CENTER

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±84.8 TOTAL ACRES

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SEPTIC TANK #2

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BUILDING 1

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SAND FILTER BEDS (2)

SEPTIC TANK #3

WET LAB

BUILDING 1A

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RESERVOIR

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EXISTING SNARC FACILITY WASTEWATER SYSTEM

LEGEND

EXISTING PROCESS WASTEWATER

EXISTING COMBINED WASTEWATER

EXISTING DOMESTIC WASTEWATER

PROPERTY BOUNDARY

APHIS BUILDING

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STUTTGART

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EXISTING PROCESS WASTEWATER

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EXISTING DOMESTIC WASTEWATER

PROPERTY BOUNDARY

PROPOSED DOMESTIC WASTEWATER

SPECIFICATIONS

DESIGN CALCULATIONS

EXISTING SAND FILTER

OUTLET EL. = 196.00'

PROPOSED TABLET CHORINATOR

INLET/OUTLET EL. = 193.0'

OUTLET TURNDOWN PIPE EL. = 192.5'

HYDRAULIC PROFILE

SCALE: NTS

PROPOSED HDPE SEALED

CLOSED PIPE MANHOLE AND

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PIPE EL. = 193.5'

PROPOSED TABLET DECHORINATOR

INLET/OUTLET EL. = 192.8'

INLET/OUTLET TURNDOWN PIPE EL. = 192.3'

TOP OF GRADE = 200.00'

PROPOSED 4" CHLORINATION

CONTACT PIPE

PROPOSED 4" DECHLORINATION

CONTACT PIPE

EXISTING 4" PVC PIPE

PROPOSED SUMP PUMP

RIM EL. = 194.5'

INLET EL. = 192.5'

INLET TURNDOWN PIPE EL. = 192.0'

PROPOSED 2" CHECK

VALVE AND 2" PVC

DISCHARGE PIPE

NEW DISINFECTION AND OUTFALL 001

EXISTING OUTFALL

INSTALL 90 ° BEND AND NORWECO

LF-1000 BIO-DYNAMIC DECHLORINATION

TABLET FEEDER AND 90 ° BEND.

EXISTING SAND FILTER BEDS (2)

EXISTING COMBINED

WASTEWATER PUMP

STATION #4.

EXISTING SANITARY INFLUENT

FROM FACILITY COMPLEX

INSTALL 36" HDPE SEALED CLOSED

PIPE MANHOLE (RIM EL. 197.5') AND

ModMAG BADGER M5000

ELECTROMAGNETIC 2" FLOW METER

EXISTING 4" PVC. PROPOSED

PROCESS WATER ONLY TO

STORAGE RESERVOIR.

INSTALL 5 LF OF 2"

SCH. 40 PVC AT

22.5° BEND TO

FLOWMETER

INSTALL 20 LF OF 4" SCH. 40 PVC AT DISCHARGE OF

CHLORINATOR TO INLET OF DECHLORINATOR WITH

4-90 ° TURNDOWN BENDS SUCH THAT THE TOP OF 4"

PIPE BETWEEN TABLET FEEDERS IS LOWER THAN

THE BOTTOM OF THE TABLET FEEDERS,

MAINTAINING FULL FLOW IN THE 4" PIPE.

AR-130 ROADSIDE DITCH FLOWING EAST

TO LITTLE LAGRUE BAYOU

INSTALL 20 LF OF 4" SCH. 40 PVC AT DISCHARGE

OF DECHLORINATOR TO INLET OF PUMP WITH

4-90 ° TURNDOWN BENDS SUCH THAT THE TOP OF

4" PIPE BETWEEN TABLET FEEDER AND PUMP IS

LOWER THAN THE BOTTOM OF THE TABLET

FEEDER AND PUMP, MAINTAINING FULL FLOW IN

THE 4" PIPE.

EXISTING 36" CONCRETE PIPE

STORMWATER DRAIN TO DITCH

CUT EXISTING 4" PVC AND INSTALL 90 °

BEND AND NORWECO LF-1000 BIO-DYNAMIC

CHLORINE TABLET FEEDER

INSTALL ZOELLER 912 SIMPLEX M266 18"X30"

SUMP PUMP PACKAGE INSIDE OF EXISTING

FENCELINE. CONNECT TO ELECTRIC.

INSTALL 4" PLUG

AR-130

EXISTING 4" PVC. PROPOSED

PROCESS WATER ONLY TO

STORAGE RESERVOIR.

EXISTING OUTFALL AND FLOWMETER

(TO BE ABANDONED BY OTHERS).

AR-130

.AR-130 ROADSIDE DITCH FLOWING EAST TO LITTLE LAGRUE BAYOU.

PROCESS WATER STORAGE RESERVOIR

EXISTING CHLORINE CONTACT

CHAMBER, CONCRETE VAULT, AND

CONNECTED PIPING TO BE

ABANDONED AND REMOVED.

EXISTING SANITARY SEWER LIFT STATION

INSTALL 10 LF OF 2" SCH. 40

PVC WITH 2" CHECK VALVE TO

NEW OUTFALL 001 AT DITCH

EXISTING FENCE

PROPOSED

OUTFALL 001 AT DITCH

OUTLET EL. = 190.5

EXISTING GRADE

PROPOSED PROCESS WASTEWATER

40 Employee's @ 16 gpd each = 640 gpd

APPROXIMATE ALIGNMENT OF PROPOSED

4" SCH. 40 PVC. DISCHARGE OF PROCESS

WATER ONLY TO STORAGE RESERVOIR.

FINAL ALIGNMENT TO BE LOCATED IN THE

FIELD AT THE DIRECTION OF THE OWNER.

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ARKANSAS

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AutoCAD SHX Text ELECTROMAGNETIC FLOW METER AND SEALED CLOSED PIPE HDPE MANHOLE 1.0 GENERAL GENERAL The flow meter shall be designed for applications without power, where flow is continous, that will indicate flow rate and daily totalization through a battery powered LCD display. The flow meter shall contain a stainless steel tube design that is corrosion resistant and specified for use in wastewater applications. The flow meter must be sealed and waterproof to allow for complete submersion of the display and electronics. The sealed closed pipe HDPE manhole shall be designed for subsurface and moisture proof applications with a water tight pipe penetrations, bottom, and lid. 2.0 PRODUCTS PRODUCTS 2.1 ModMAG M5000 2.0"- Electromagnetic Waterproof Flow Meter or equal. ModMAG M5000 2.0"- Electromagnetic Waterproof Flow Meter or equal. 2.2 Ferguson Industrial 36"diameter by 54" depth sealed closed pipe manhole or equal. To meet ASTM F-1759-97 requirements for subsurface application. 3.0 EXECUTION EXECUTION Flow meter and closed pipe manhole to be installed and maintained per manufacturer's guidelines and specifications.

AutoCAD SHX Text SUMP SEWAGE PUMP PACKAGE 1.0 GENERAL GENERAL The sump sewage pump package shall be a self-contained, direct buried outdoor application with a 4.0" inlet and 2.0" dishcarge line. The electric motor shall be minimum 0.5 horsespower and supplied by 120 volt, 15-amp service. The well must be equipped with an audible and visual high water level alarm. The well float level must be adjustable with a 2" check valve installed on the discharge line. 2.0 PRODUCTS PRODUCTS 2.1 Zoeller 912 SIMPLEX M266 - 0.5 HP Sewage Grinder System (18"30") w/ Zoeller 912 SIMPLEX M266 - 0.5 HP Sewage Grinder System (18"30") w/ high water level alarm or equal. 2.2 Zoeller A-PAK Deluxe 10-0682 indoor/outdoor alarm package. 3.0 EXECUTION EXECUTION Sewage Sump Pump Package to be installed and maintained per manufacture's guidelines and specifications.

AutoCAD SHX Text NOTE: THE VENDOR INFORMATION THE VENDOR INFORMATION FOR THE PROPOSED CHLORINATION, DECHLORINATION, TABLETS, SEALED CLOSED PIPE MANHOLE, FLOW METER, AND SEWAGE SUMP PUMP EQUIPMENT IS SPECIFIED IN THE SPECIFICATIONS SECTION PRESENTED AND CERTIFIED ON THIS SHEET.

AutoCAD SHX Text TABLET CHLORINATION DISINFECTING SYSTEM 1.0 GENERAL GENERAL Disinfecting tablet feeder and disinfecting tablets shall be installed, formulated and produced to insure effective and dependable disinfection for wastewater treatment system where a predictable long-term source of chlorine is of chlorine is desirable. Bio-Sanitizer tablets shall dissolve slowly and evenly, providing evenly, providing effective bacteria reduction while minimizing chemical consumption. The consumption. The tablets shall be 2-5/8" diameter, compressed to 13/16" thickness with an approximate weight of 5 oz. and incorporate beveled edges to minimize operator maintenance. 2.0 PRODUCTS PRODUCTS 2.1 Disinfecting Tablet Feeder to be Norweco LF-1000 Bio-Dynamic Tablet Disinfecting Tablet Feeder to be Norweco LF-1000 Bio-Dynamic Tablet Feeder or equal. 2.2 Disinfecting Tablets to be Norweco Bio-Sanitizer Disinfecting Tablets or Disinfecting Tablets to be Norweco Bio-Sanitizer Disinfecting Tablets or equal. 3.0 EXECUTION EXECUTION Disinfecting Tablet Feeder and Tablets to be installed and maintained per manufacturer's guidelines and specifications.

TABLET DECHLORINATION SYSTEM 1.0 GENERAL GENERAL Dechlorination tablet feeder and dechlorination tablets shall be installed, formulated and produced to serve as a source of concentrated sodium sulfite for the removal of chlorine in wastewater discharge. Bio-Neutralizer tablets shall be engineered to dissolve slowly and evenly, maintaining effluent quality without any loss of dissolved oxygen or increase in BOD5. The tablets shall be 2-5/8" diameter, compressed to 13/16" thickness with an approximate weight of 5 oz. and incorporate beveled edges to stabilize chemical release and to minimize maintenance requirements. 2.0 PRODUCTS PRODUCTS 2.1 Dechlorination Tablet Feeder to be Norweco LF-1000 Bio-Dynamic Tablet Dechlorination Tablet Feeder to be Norweco LF-1000 Bio-Dynamic Tablet Feeder or equal. 2.2 Dechlorination Tablets to be Norweco Bio-Neutralizer Dechlorination Tablets Dechlorination Tablets to be Norweco Bio-Neutralizer Dechlorination Tablets or equal. 3.0 EXECUTION EXECUTION Dechlorination Tablet Feeder and Tablets to be installed and maintained per manufacturer's guidelines and specifications.

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5800 Evergreen Drive Little Rock, AR 72205

Ph (501) 663-8800 Fax (501) 588-0123 www.harborenv.com

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Scale:

NOTED

Project Number:

L8247738

Drawn By:

AES

Checked By:

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NOT TO SCALE

ZOELLER 912 SIMPLEX M266

18" x 42" SUMP PUMP & VAULT

4" INLET PIPE

4" MIN BACKFILL

MATERIAL

4" MIN COMPACTED

SUB-BASE MATERIAL NOT TO SCALE

NORWECO BIO-DYNAMIC LF1000

CHLORINE TABLET FEEDER

FLOW

FROM SAND

FILTER BEDS DISCHARGE

CHLORINATOR DECHLORINATOR

BACKFILL WITH SELECT EXCAVATED MATERIAL. NO ORGANIC

MATERIAL OR SOIL WITH STONES LARGER THAN 3".

PLACE TRACER TAPE WITH IMPRINTED

WORD "SEWER" 12" ABOVE PIPE

TO 95% MODIFIED PROCTOR DENSITY.)

TO 90% STD. PROCTOR AS DETERMINED

STONE IN 8" LIFTS AND COMPACT

WITH AHTD CLASS 7 CRUSHED

(UNDER TRAFFIC AREAS, BACKFILL

BY AASHTO T-99

BEDDING AND INITIAL BACKFILL

MATERIAL SHALL MEET ASTM

COMPACTED IN 4" - 8" LIFTS

D448, SIZE #67 OR ASTM D2774

18"MAX.

4"MIN.

OR CONNECTED TO PIPE.

AT ALL PVC PIPES. LOOPED

INSTALL 14 GAUGE TRACER WIRE

USE 4" MIN BEDDING

NOTE:

18"MAX.

4"MIN.

USE 6" MIN PIPE COVER

UNDISTURBED EARTH

GRADE

COMPACTED SB-2

(NOT PART OF THIS CONTRACT)

ASTM D-1557

COMPACT 95 %

SB-2

OR MATERIAL MEETING THE REQUIREMENTS

OF ASTM D-2774

AS DETAILED IN ASCE MANUAL NO. 37,

CLASS B, C, OR D MATERIAL

SERVICE CROSSINGS IN STREET

SHALL USE THIS BEDDING DETAIL.

NOTE : THE TYPICAL PVC AND

PE BEDDING IN STREET SHALL

EXTEND PAST THE PROPOSED BACK

OF CURB NO LESS THAN 6'-0".

NOTE : ALL WATER AND SEWER

6"

6"

6"

6"

ASPHALT

(NOT PART OF THIS CONTRACT)

THRUST BLOCKING DETAILS

TYPICAL TRENCH FOR PVC GRAVITY SEWERS TYPICAL BACKFILL FOR PVC PRESSURE PIPES TYPICAL PVC & PE BEDDING IN STREET

NOT TO SCALE

NOT TO SCALE

NOT TO SCALE NOT TO SCALE

FINISHED GRADE ELEV 194.5'

4" PIPE INVERT ELEV 192.5'

HIGH LEVEL ALARM SWITCH ELEV 193.7'

FLOAT SWITCH "ON" ELEV 192.2'

BOTTOM OF SUMP ELEV 191.0'

TO SUMP PUMP

FLOAT SWITCH "OFF" ELEV 191.5'

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2. FITTINGS TO BE WRAPPED IN VISQUEEN OR POLYETHYLENE ENCASEMENT

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3. CONCRETE STRENGTH f = 3000 P.S.I.

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"B" SQ.

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4" MIN. (PIPES 24" DIA. AND SMALLER)

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8" MIN. (PIPES 27" DIA. AND LARGER)

AutoCAD SHX Text SELECT BEDDING, HAUNCHING, & INITIAL BACKFILL TO BE PLACED IN 4" LOOSE LIFTS AND COMPACTED TO 95% MIN. STANDARD PROCTOR @ ±2% OPTIMUM MOISTURE (ASTM D698)

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AutoCAD SHX Text 12"

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TRENCH WIDTH

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0' TO 24' DEPTH

AutoCAD SHX Text BACKFILL WITH SELECT EXCAVATED MATERIAL. NO ORGANIC MATERIAL OR SOIL WITH STONES LARGER THAN 3".

FINAL GRADE

Appendix B STATE CONSTRUCTION PERMIT Permit Number: AR0049352C (4 pages)

Permit No. AR0049352C

AFIN: 01-00135

STATE CONSTRUCTION PERMIT

Permit Number: AR0049352C

Permittee: Consulting Engineer:

U.S. Department of Agriculture-Agriculture Research Service Garret J. Hafemann, P.E.

Harry K. Dupree Stuttgart National Aquaculture Research Center Harbor Environmental

2955 Highway 130 East 5800 Evergreen Dr.

Stuttgart, AR 72160 Little Rock, Ar 72205

This permit allows the permittee listed above to modify the wastewater treatment system in accordance with the permit application and plans and specifications which were received on October 23, 2025, and all additional information received by January 5, 2026, under authority of the Arkansas Water and Air

Pollution Control Act (Arkansas Code Annotated § 8-4-101 et seq. and Arkansas Code Annotated § 8-4-

201 et seq.) and the following terms and conditions.

1. The treatment system shall be modified in accordance with the final plans and specifications as submitted to the Division of Environmental Quality (DEQ). In case any statement or representation in the aforementioned documents is found to be incorrect, this approval may be revoked.

2. There shall be no deviation from the permitted plans and specifications unless the revisions have been submitted for review and written approval is received.

3. Within thirty (30) days of completion of the construction the permittee shall submit a Notice of

Completion of Construction to the Division (Permits Branch of the Office of Water Quality) that the facility has been modified in accordance with the approved plans and specifications. The certification shall be signed by the Responsible Official as well as stamped and signed by a Professional Engineer

(P.E.) licensed in the state of Arkansas. The Notice of Completion of Construction form is located at the following web link:

https://www.adeq.state.ar.us/water/permits/npdes/individual/pdfs/state-construction-permit-completion-of-construction.pdf

4. This permit is issued in reliance upon the statements and representations made in the application and the plans and specifications. Issuance of this State Construction Permit does not guarantee satisfactory performance of the treatment system. The permittee shall ensure that water quality standards are not violated. Any modifications to the treatment facility necessary to meet water quality standards are the responsibility of the permittee and would require a modification to this State Construction Permit.

5. A State Construction Permit for the modification of an existing wastewater treatment facility does not constitute an NPDES permit. Issuance of a State Construction Permit for modification of a treatment system in no way guarantees or assumes that an application for an NPDES permit to operate the system will be approved or an NPDES permit will be issued.

6. A complete “Operations and Maintenance (O&M) Manual” of the wastewater treatment system shall be updated by the facility consultant for the operator’s use before the plant is in operation.

7. Failure to begin construction within one (1) year of the effective date may result in termination of this permit if a request for an extension is not submitted to the Division in a timely manner.

8. The permittee must submit notification of the start of construction within fifteen (15) days after construction has begun.

https://www.adeq.state.ar.us/water/permits/npdes/individual/pdfs/state-construction-permit-completion-of-construction.pdf https://www.adeq.state.ar.us/water/permits/npdes/individual/pdfs/state-construction-permit-completion-of-construction.pdf

9. If a construction site will disturb greater than or equal to one (1) acre and less than five (5) acres, the permittee shall comply with the requirements in PC&EC Rule 6.203 for Stormwater discharge associated with a small construction site, as defined in PC&EC Rule 6. If the construction site will disturb five (5) acres or more, the permittee shall comply with the terms of the Stormwater Construction

General Permit Number ARR150000 prior to the start of construction. BMPs must be implemented regardless of the size.

10. This facility is located as follows: Latitude: 34 28’ 30.75” N; Longitude: 91 24’ 57.91” W in Arkansas

County, Arkansas.

11. The receiving waters for this facility are an unnamed ditch, thence to Little LaGrue Bayou, thence to

La Grue Bayou, thence to the White River in Segment 4A of the White River Basin. The outfall is located at the following coordinates: Outfall 002: Latitude: 34 28’ 33.28” N; Longitude: 91 24’ 54.00” W.

12. The construction will include: installation of a new outfall (Outfall 002), replacement of the tablet chlorinator with a new tablet chlorinator, installation of a tablet dechlorinator, re-routing piping to remove process wastewater from the wastestream (for recycling), and associated pumps and piping.

The modified treatment system will have an average flow of 0.001 MGD. The existing treatment system consists of: septic tank and chlorine disinfection for process wastewater, and septic tanks, intermittent sand filters, and chlorine disinfection for sanitary wastewater with an average flow of 0.086 MGD.

13. If the permittee wishes to continue an activity regulated by this permit after the expiration date of this permit, the permittee must apply for and obtain a new permit. The complete application shall be submitted at least 180 days before the expiration date of this permit. The Director may grant permission to submit an application less than 180 days in advance but no later than the permit expiration date.

Conditions of this permit will continue in effect past the expiration date pending issuance of a new permit if:

a. The permittee has submitted a timely and complete application as described in Rule 6.202(B);

and

b. The Director, through no fault of the permittee, does not issue a new permit prior to the expiration date of this permit.

Effective Date: May 1, 2026

Expiration Date: April 30, 2031

Stacie R. Wassell Issue Date

Deputy Director, Office of Water Quality

Arkansas Department of Energy and Environment

Division of Environmental Quality

Stacie.Wassell Typewritten Text

Stacie.Wassell Typewritten Text April 29, 2026

Page 1 of Statement of Basis

STATEMENT OF BASIS

For State Construction Permit Number AR0049352C.

The issuing office is:

Division of Environmental Quality

5301 Northshore Drive

North Little Rock, Arkansas 72118

The applicant is:

U.S. Department of Agriculture - Agriculture Research Service

Harry K. Dupree Stuttgart National Aquaculture Research Center

2955 Highway 130 East

Stuttgart, AR 72160

1. BASIS FOR PERMIT AND CONDITIONS

This permit is your authority to modify the wastewater treatment system in accordance with the permit application and plans and specifications which were received on October 23, 2025, and all additional information received by January 5, 2026. The issuance of this permit and conditions are based on the

Arkansas Water and Air Pollution Control Act (Arkansas Code Annotated § 8-4-101 et seq. and

Arkansas Code Annotated § 8-4-201 et seq.), Pollution Control and Ecology Commission (PC&EC)

Rule 6.202, codified at 8 CAR § 25-202, NPDES Discharge permit AR0049352, and 40 C.F.R. §

122.26.

Specific permit conditions and their sources are listed as follows:

Conditions 1, 2, 3, 4, 5, 6, 7, and 8 are self-explanatory. Condition 9 is based on 40 C.F.R. § 122.26.

Conditions 10, 11, and 12 are based on the submitted application and Plans and Specifications.

Condition 13 is based on Arkansas Code Annotated § 8-4-203(a).

2. PUBLIC NOTICE

The public notice of the draft permit was published for public comment on March 15, 2026. The last day of the comment period was thirty (30) days after the publication date. No public comments were received on the draft permit.

3. PERMIT FEE

In accordance with PC&EC Rule 9.402(A), codified at 8 CAR § 12-302(b)(2), the fee for issuance of a state construction permit is $500.

4. SOURCES

1. Application Form 1 and Plans and Specifications dated October 23, 2025, with all additional information received by January 5, 2026.

2. 2014 Edition of Recommended Standards for Wastewater Facilities (Ten State Standards).

3. PC&EC Rules 6, 8, and 9, codified at 8 CAR Parts 25, 11, and 12, respectively.

4. A.C.A. § 8-4-217(b)(1)(C).

5. 40 C.F.R. § 122.26.

6. Arkansas Department of Health letter dated October 16, 2025.

Page 2 of Statement of Basis

5. CONTACT PERSON

The DEQ contact person for submitting written comments, requesting information, or obtaining copies of the application, permit, and the Statement of Basis is:

Guy Lester, P.E.

Professional Engineer

NPDES Branch, Office of Water Quality

Division of Environmental Quality

5301 Northshore Drive

North Little Rock, Arkansas 72118-5317

(501) 519-0304

Appendix C Arkansas Department of Health Approval Letter (1 Page)