WQ0040672_Application_20200330

Quible &Associates, P.C.
ENGINEERING • ENVIRONMENTAL SCIENCES • PLANNING • SURVEYING
SINCE 1959
Mr. Nathaniel Thornburg, Branch Chief
Division of Water Resources - Non -Discharge Branch
NC Department of Environmental Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
By CourierlSpecial Delivery.
Attn: Nathaniel Thornburg — 91h Floor. Office #942X
512 N. Salisbury St. Raleigh, NC 27604
Re: Permit No. WQ0040672 — Modification Request
Stevens Towing - Riverbulk Terminal WWTF
Edenton, Chowan County, North Carolina
Dear Mr. Thornburg,
01
RECEIVED
By Nathaniel Thornburg at 10:31 am, Mar 30, 2020
P.O. Drawer 870
kitty Hawk NC 27949
Phone: [phone]
Fax: [phone]
web: quible.corn
On behalf of Stevens Towing Co. of North Carolina, LLC, Quible & Associates, P.C. hereby
submits for your review the following documents for your review of a request to modify Permit
No. WQ0040672 for the Stevens Towing - Riverbulk Terminal WWTF project located in Chowan
County, North Carolina. Expanding upon previous email correspondence with Ms. Ashley Kabat
in February, there are a few items being requested to change from the originally issued Permit
to provide a more streamlined installation and possibly better treatment and operation.
The equalization and septic tanks were customized designs to allow for construction in place,
Applicant's original request. Utilizing multiple precast tanks has now been determined to
provide a more streamlined installation. We request that dual 6,370 gallon pre -cast tanks
stamped PT-548 substitute the approved 31'x1O'x5' 11,539 gallon customized equalization tank.
The proposed equalization tanks would be interconnected with two watertight booted 8"
diameter SCH 40 PVC connections at the pump off elevation 18" from the tank bottoms.
We also request that a 14,000 gallon pre -cast septic tank stamped STB-538 substitute the
approved 31.5'x6.75'x10' 15,653 customized septic tank (having 12,754 gallon liquid capacity).
Finally, we request that the approved duplex HOMA Model AV432-175/17, 4T/C 17.4 HP final
dosing pumps (157 gpm at 100 ft TDH) be substituted with 7 HP duplex final dosing pumps
HOMA Model TP53M80U2/3/230/460V having 80 gpm at 100 ft TDH. In order to accomplish
this change, the sprayfield is proposed to be split into two zones, each having a separate force
main. The final dosing tank would include an "H" configuration allowing for flexibility of either
pump to discharge to either sprayfield zone.
We appreciate your reviewing these modifications that will help provide for a successful
installation of the subject facility. Enclosed within the modification package, as listed below, you
will find computations to demonstrate residuals storage, hydraulic and pollutant loading,
effective storage, pump computations, and other supporting documents to demonstrate
compliance within the Rules.

Stevens Towing Hkmdm|kTerminal VVVVTF(Permit No. VVQ004OO72
Modification Request
The following documents are enclosed, shall substitute respective previously submitted iterns/
and shall be considered part of this modification request package:
1. TVVV(2) Copies OfRevised Specifications Manual Cover;
2' Two (2) Copies of Revised Specification Section 02740' Precast Tanks;
3. Two (y) Copies of Revised Specification Section 02741, Pumps & Controls;
4. Two (2) Copies of Additional Technical Data to be included within the Design
COnoput@1iODS of the Specifications K88Ou8| including the following;
@. Equalization Tank;
b. Seotio��nk'.
.'
c. 8|Udgg Quantity;
d. Equalization and Final Dosing Pumps;
e. Buoyancy Computations;
f. Dosing Pump System Curve Spreadsheet;
g. Dosing Pump Cut Sheets /kPerformance Curve;
5' Two /2\Copies ofthe Operation and Maintenance Requirements and Residuals
Management Plan, Schedule A (shall replace the previously provided within the
Specifications Manual);
0' Two (2) full-size (24'x38") Copies of the Updated Engineering Plan Set;
7. Two (2) full-size (24"x36") Copies of the Updated Site Map;
The following has also been included for reference:
We trust that the information and associated enclosures will allow the processing of the
requested permit modification.
Please dVnot hesitate t0contact 0H81252.491.8147Or should you have
any questions, concerns, orany requests for additional information.
Sincerely,
Quible & Associates, C.
. —__— W. ---__' Jr., P.E.
End: as stated
Cu Ashley KabatNCDE[J Unit
Simon B. Rich, U|, Stevens Towing Co. of North Carolina, LLC
File
PllDrawer 87O~Kitty Hawk, NC27Q4S
Telephone (252)4Q1-8147~Fax (252)4A1-8146
2

Too
Since 1959
Specifications Manual
for
Stevens Towing Co. Riverbulk Terminal
12,710 GPD Wastewater Treatment Plant
Prepared for:
Stevens Towing Co. of North Carolina, LLC
125 Dye Plant Rd.
Edenton, NC 27932
PHONE: [phone]
tcozc
Prepared by:
Quible & Associates, P.C.
Engineering $ Environmental Sciences $ Planning $ Surveying
P.O. Drawer 870
Kitty Hawk, North Carolina 27949
[phone] Fax [phone]
E-mail [e-mail]
Project Number: P15055
February 21, 2019
Revised March 27, 2020

SECTION 02740 - PRECAST TANKS
PART 1: GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of Contract, including Technical Data, Operation &
Maintenance Requirements and Supporting Data apply to this Section.
1.2 SUMMARY
A. This Section includes precast septic and pump tank installation.
B. Related Sections: The following Sections contain requirements that donate to this
Section:
1. Section 02110 - Site Clearing
2. Section 02200 - Earthwork
1.3 SUBMITTALS
A. General: Submit tank details from manufacturer.
B. Shop drawings showing fabrication of each tank.
1.4 QUALITY ASSURANCE
A. Comply with applicable portions of NCDEQ, Division of Water Resources (DWR)
permit.
B. Precast tanks shall be constructed in accordance with plans that have been approved by
the DHHS, Department of Health & Human Services, On -Site Water Protection Branch,
Environmental Health Section and with all requirements of the Law and Rules for
Sewage Treatment and Disposal Systems, Section .1900 which is hereby adopted by
reference.
C. All tanks produced shall bear an imprint identifying the manufacturer, the serial number
assigned to the manufacturer's plans and specifications approved by the State, and the
liquid or working capacity of the tanks. This imprint for septic tanks shall be located to
the right of the blockout made for the outlet pipe on this outlet end of the tank. The
imprint for pump tanks shall be located to the left of the outlet blockout. All tanks shall
also be permanently marked with the date of manufacturer adjacent to the tank imprint or
on the top of the tank directly above the imprint.
PRECAST TANKS 02740 - 1

PART 2: PRODUCTS
2.1 PRECAST TANK UNITS
A. General:
Provide tanks and accessories according to State approved plans, details and
permit conditions.
2. Provide access openings and manhole castings as indicated.
B. Equalization Tank: Two (2) 6,370-gallon precast, traffic rated Pump Tanks
PT-548 as manufactured by Garners Septic Tanks, Inc.
or equal as approved by Engineer/Owner.
C. Septic Tank: 14,000-gallon precast, traffic rated Septic Tank
STB-538 as manufactured by Garners Septic Tanks, Inc.,
or equal as approved by Engineer/Owner.
D. Final Dosing Tank: 3,528-gallon precast, traffic rated Pump Tank
PT-377 as manufactured by Garners Septic Tanks, Inc.,
or equal as approved by Engineer/Owner.
2.2 MANHOLE COVERS
A. 24" Cast iron, manhole rings and covers shall be water -tight with "Sanitary Sewer"
imprinted on top. Rings & covers shall be East Jordan Iron Works, Inc., Neenah Foundry,
or U.S. Foundry & Manufacturing, Corporation or equal as approved by Engineer/Owner.
2.3 ALUMINUM HATCH COVERS
A. Aluminum Hatch covers shall be water -tight access frame and covers unless otherwise
specified. Aluminum hatches shall be U.S.F. Fabrications, Inc., Halliday Products or
Thompson Fabricating, L.L.C., or equal as approved by Engineer/Owner.
2.4 TANK SUBBASE MATERIAL
A. Subbase Material: Compacted native soils.
PART 3: EXECUTION
3.1 TANK INSTALLATION
A. Excavation
Dig suitable excavation, braced and sheeted as soil conditions dictate,
refer to Section 02200 - Earthwork.
2. The excavation shall be kept free of water at all times. The contractor
shall provide the means for dewatering the pit and the cost thereof shall
be included in the price for installing tanks.
PRECAST TANKS 02740 - 2

B. Subbase:
1. Compact native soils.
C. Waterproofing:
1. After joining, tanks manufactured in two sections shall be plastered
along the joint with hydraulic cement, cement mortar, or other approved
waterproofing sealant. Other methods of waterproofing tanks may be
used as specifically approved in the Plans and Specifications for the
system.
2. Prior to backfilling, the Engineer/Owner shall make a finding that a two
section tank is watertight.
D. Leakage Test:
1. Prior to backfilling and covering tanks; perform leak test as follows:
a. Notify the Engineer/Owner 24 hours prior to beginning test.
b. Tanks to be filled with clear water to top of tank above the
highest riser or tank seam (inlet and outlet pipes shall be
plugged). The water shall be left in the tank for 24 hours and
water level measured by Engineer/Owner.
C. With soil dewatered, water level in tank must not drop more than
one-half ('/z") inch.
E. Backfill and Compaction:
1. Backfill in accordance with Section 02200 - Earthwork
2. Protect tank from equipment and vehicular traffic.
3. Grade site to prevent ponding of water above and around tanks.
END OF SECTION 02740
PRECAST TANKS 02740 - 3

SECTION 02741 - PUMPS AND CONTROLS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of Contract, including Technical Data, Operation &
Maintenance Requirements and Supporting Data apply to this Section.
1.2 SUMMARY
A. This Section includes sewage effluent pumps, controls, wiring, control panel with related
work and accessories.
B. The electric power supply to the wastewater control panel will be installed by the General
Contractor. The wastewater contract electric system shall commence at the above supply
stub -out and include connection to same up to and including final connection to equip-
ment provided in this section.
1.3 SUBMITTALS
A. Product Data: Submit complete descriptive data for all items. Data shall consist of speci-
fications, data sheets, capacity ratings, performance curves, catalog cuts, dimensional
drawings, wiring diagrams, installation instructions, and any other information necessary
to indicate complete compliance with contract documents.
1.4 QUALITY ASSURANCE
A. Comply with applicable portions of NCDEQ, Division of Water Resources (DWR) per-
mit.
B. All electric work and materials under this section shall be in strict compliance with more
stringent requirements of the North Carolina State Building Code, including the National
Electric Code, NFPA 101 - Life Safety Code, Regulations of the State Fire Marshal, UL
Directory of Electrical Construction Materials, and requirements of the local utility com-
pany.
C. It is the intention of the Specifications and Drawings to call for finished work, tested and
ready for operation.
PART 2-PRODUCTS
2.1 MATERIALS AND EQUIPMENT
A. Materials and equipment installed as a permanent part of the project shall be new, unless
otherwise indicated or specified, and of the indicated type and quality. Where no specific
type and quality of material is given, a first-class standard article as approved by the En-
gineer shall be furnished.
02741 — PUMPS & CONTROLS

B. The listing of a particular manufacturer or model number is not intended to indicate a
sole source but rather a minimum standard of quality or performance acceptable. Where
material or equipment is identified by proprietary name, model number and/or manufac-
turer, furnish named item, or its equal, subject to approval by Engineer. Substituted items
shall be equal or better in quality and performance and must be suitable for available
space, required arrangement, and application. Submit all data necessary to determine
suitability of substituted items, for approval.
C. Where more than one item is named, only the first named item has been verified as suita-
ble. Substituted items, including items other than first named shall be equal or better in
quality and performance to that of the specified items, and must be suitable for available
space, required arrangement and application.
D. The contractor shall be required to adapt all substituted materials and equipment without
increase to the contract amount. Where substitutions involve more than minor deviations
from the plans and specifications, such deviations shall be submitted to the Engineer for
approval prior to installation.
2.2 PUMPS
A. EQUALIZATION PUMPS
CAPACITY: 50 GPM � 10 ft. TDH
HOMA, MODEL TP49V24/2/3, Effluent Pump
1.5 HP, 3450 RPM
230 V/460 V, Three Phase
2" Discharge
(Verify power supply with utility company prior to ordering pump and controls)
B. FINAL DOSING PUMPS
CAPACITY: 80 GPM � 100 ft. TDH
HOMA, MODEL TP53M80L/2/3, Effluent Pump
7.0 HP, 3450 RPM
230 V/460 V, Three Phase
3" Discharge
(Verify power supply with utility company prior to ordering pump and controls)
2.3 CONTROL EQUIPMENT
A. The control equipment manufacturing and wiring for dwelling shall be done in accord-
ance with the NEC, latest revisions. Control equipment shall generally consist of the fol-
lowing for each system:
Independent Control panels to serve each treatment area as specified on the
Wastewater Plans. Control panels shall consist of simplex, duplex or triplex con-
trol panel, housing motor overcurrent protection and starters, control circuit
transformer and control circuit switches, and indicators.
2. Level switches.
Alarm indicator light and bell on 6-inch by 6-inch salt -treated post at pump sta-
tion. Alarms at pump station shall be on separate circuit from pumps and con-
trols.
B. All control equipment shall bear the Underwriters Laboratory label. Main control panel
shall be either UL listed or be constructed of UL listed components.
02741 — PUMPS & CONTROLS 2

C. Panel enclosures shall be NEMA 4X enclosures. Enclosure shall be fiberglass.
D. The main control panel shall have:
1.
a dead front with separate removable inside panel to protect electrical equipment.
2.
a lock hasp on outside door. (lock to be provided by owner)
3.
a main circuit breaker for each pump.
4.
main circuit breaker for alarm and control circuits, separate from pump.
5.
separate auxiliary circuit breakers for alarm and control circuits.
6.
yellow run light for each pump
7.
H-O-A switch for each pump
8.
alarm switch for On -Off and Test.
9.
weatherproof outside flashing red alarm light (alarm shall be latching).
10.
weatherproof outside alarm bell.
11.
a terminal strip for connecting pump and controls.
12.
an elapsed time meter for each pump.
13.
surge arrester to protect against lightning
14.
a schematic diagram fixed on the inside of door.
15.
provide weatherproof 110V GFCI receptacle.
16.
a cycle counter for each pump
17.
alarm must have a latching feature so that when the high water alarm float drops
the alarm remains engaged.
18.
a programmable timer
E. Level switches shall:
1.
be mercury tube switches sealed in a solid polyurethane float.
2.
have sealed power cord with weight attached above the float to hold switch in
place.
3.
be suspended from a stainless steel float bracket through holes provided with rub-
ber snubbers to protect the cord and to hold cord at any set height.
4.
be set to heights shown on Drawings.
F. Contractor shall provide Owner two sets of operation and maintenance instructions with
02741 — PUMPS &
CONTROLS 3

parts list for each pump station and controls.
G. All wire leads for pumps and floats shall pass through a watertight and gas -tight conduit
to the control panel. Conduit shall be of sufficient size to enable all leads to pass
through.
2.4 PUMP LIFTING CHAIN
A. Pump lifting chain shall be of adequate size, stainless steel chain and shall be connected
to transfer lifting loads to the pump. Upper end of chain shall be secured at the top of the
basin within easy reach from above.
PART 3 - EXECUTION
3.1 PUMPS AND CONTROLS
A. Pump and controls shall be installed in accordance with manufacturer's instructions and
all applicable local and state building codes.
3.2 TESTING
A. Once system pressure head is set, a drawdown test shall be performed. The drawdown
shall be measured in gallons per minute and compared to the design flow.
B. Alarm Test: With power off, fill pump tank with water until level is above alarm float
level. Turn power on; alarm light should energize. Pump (single) should energize.
Alarm light should de -energize when water level drops below alarm level.
C. Operate all equipment, floats and controls to ensure proper installation.
END OF SECTION 02741
02741 — PUMPS & CONTROLS 4

Q u' b I e SINCE 1959
' JOB I ro
SHEET NO.
OF
Quible & Associates, P.C.
ENGINEERING - ENVIRONMENTAL SCIENCES - PLANNING - SURVEYING
8466 Caratoke Highway * Powells Point, NC 27966
Phone [phone] FAX [phone]
CALCULATED BY WI-S -DATE _%/cZ.L--7c)
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Q u i b' a SINCE 19.59
Quible & Associates, P.C.
ENGINEERING - ENVIRONMENTAL SCIENCES - PLANNING - SURVEYING
8466 Caratoke Highway - Powells Point NC 27966
Phone [phone] # FAX [phone]
147-
7c-1 (6, IV 1)
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3/5/2020 PT5486370jpg(1124x915)
Top View
124 24
Zf
Acess Opening to Receive Rings/ Covers,
108" Murninum Hatch, or as required b
Inlet/Outlet StateApproved
Side Knockouts to receive Rubber Boots or as required 36"
thur F pipe or as required L
N
Rings and Covers Brought to Grade. By Contractor
Side View
1 -124"
Sqfto Tanks, Inc.
Eddie Garmr, Ppestdent
garnerssepbctanks.com/BTS/PTTR/PT-548-6370.jpg
1-67 1
General Informalon
TM form also manufactures our 81300 - 22,000 gallon tanks. Engi reered and state
a Dpyovedpartels are hstalled onto the ibrrn to vmTufactureour 4000- 0000gal bn
tanks. This will reduce the wall thick ness from 84'dmrt to (rand still maintain
L-Mr-syd-MIM
End View
PT- 548, Traffic Rated
North CarolinaState approval Date: 6-04-07
Liquid CapacAy 6370 Gallons
`!Zainl`r inn Qhgvisilw oar-neidc r nra*Olnn
1/2

SEPTIC TANK

JOB F1'5C*S57
Q u i b' a SINCE 1959
Quible &Associates, P.C.
ENGINEERING - ENVIRONMENTAL SCIENCES - PLANNING - SURVEYING
8466 Caratoke Highway * Powells Point, NC 27966
Phone [phone] * FAX [phone]
SC'pTkC- ` 't'kv'
-M-lf S-ra %%,a ItIr C4OANK-9-�
SHEET NO.
CALCULATED BY
CHECKED BY
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DATE

3/5/2020
STB-538-14000.jpg (1 700x9O4)
Z?B"
Top View
Access Openings to receive
10E
r
Rings/ Covers Aluminum
Hatches. or as required.
.
b
Air
%iant
b
—
I rilet I Outlet wif State
Approved Rubber
24niet openings to receive
Boots, or as required
thur 8" Pipe or as required
Langth t.Wift -.tb 213
225'
Air Vent
10"ArSpace
State Approved
E ftrent Fitter and Tee
Straight outside
VANSI's in.
typicalInside
B"
taper vi 1.5 in,
Chamfer
MRiser section
2- Rowsof
JO.tst bes,ealed
as needed by
Butyl Rubber
insider
Sealantin aA
grooved Joints
Plain View
Approval Date 5-1 M5
Traffic Rated
Liquid Capacity 14,000 Gallon
Reinforcing Schedule- See Engineer Drawing
5000 PSI Concrete w/ State Approved Struct
Est. Total Weight = 130,400 lbs
Manufactured BY:
r
SWIG Tanks, Inc.
Eddie Garner, President
919-718-5181
121 Stanton Hill Road
Carthage,
No 28327 Fax [phone]
[e-mail]
5.5'
End View
28.
145.5'
136.5"
0 0 0 0 0
Flow Holes
Per Poser
Section
28.!
Z,Chamww
Reinforced
4
Connors
gamerssepbctanks.com/BTS/STTR/STB-538-14000.jpg

Q u i b' a SINCE 1959
Quible &Associates, P.C.
ENGINEERING • ENVIRONMENTAL SCIENCES • PLANNING • SURVEYING
8466 Caratoke Highway • Powells Point, NC 27966
Phone [phone] • FAX [phone]
SHEET NO.
CALCULATED BY It
CHECKED BY
SCALE
OF
DATE I IS (2dO7 -
dII

Q u' b' a SINCE 1959
JOB P VS O'S S
SHEET NO.
WA
Quible &Associates, P.C.
ENGINEERING • ENVIRONMENTAL SCIENCES • PLANNING • SURVEYING
8466 Caratoke Highway • Powells Point, NC 27966
Phone [phone] • FAX [phone]
lb iO St *-4- Gv� V-Q Mn
CALCULATED BY W\045 DATE V, Z -?( Z-* Z -
CHECKED BY_
SCALEN-T.
6.16 FT al;�
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BUOYANCY CALCULATIONS

PROJECT: P15055-STEVENS TOWING BARGE PORT
3/27/20 4:39 PM
INTERNAL LENGTH:
SIDE WALL THICKNESS:
EXTERIOR TANK LENGTH:
INTERNAL DEPTH:
TOP THICKNESS
BOTTOM THICKNESS
EXTERIOR DEPTH
INTERNAL WIDTH:
SIDE WALL THICKNESS:
EXTERIOR TANK WIDTH:
INTERIOR AREA REMOVED(octagonal tanks):
EXTERIOR AREA REMOVED:(octagonal tanks):
INTERIOR SECTIONAL AREA,
EXTERIOR SECTIONAL AREA:
ROUND OPENING DIAMETER
NUMBER OF ROUND ACCESSES
RECTANGULAR OPENING LENGTH
RECTANGULAR OPENING WIDTH
NUMBER OF RECTANGULAR ACCESS
ROUND RISER THICKNESS
ROUND RISER HEIGHT
RECTANGULAR RISER THICKNESS
RECTANGULAR RISER HEIGHT
TOP TANK ELEVATION:
TOP GROUND ELEVATION:
WATER SATURATION ELEVATION:
BOTTOM TANK ELEVATION
BAFFLE VOLUME:
SPECIFIC WEIGHT OF ACCESS HATCH(S)
BUOYANCY CALCUATIONS FOR EQUALIZATION TANK I (EMPTY TANK)
19.00 FT
0.67 FT
20.33 FT
67.89 SQ.FT
2.00 FT
2
0.00 FT
0.00 FT
0
0.50 FT
0.00 FT
0.00 FT�
0.50 FT
11.90 FT (MSL)
11.20 FT (MSL)
10.00 FT (MSL)
5.33 FT (MSL)
0.00 CU.FT.
70 LBS��
UPLIFT CREATED: 61,228 LBS UPLIFT
TOTAL DOWNFORCE (NO BALLAST): 75,974 LBS DOWN FORCE
TOTAL DOWNFORCE (WITH BALLAST) 75,974 LBS DOWN FORCE
NO BALLAST REQUIRED
DOWNFORCE REQUIRED: NO BALLAST ON TOP OF TANK
NO BALLAST ON TOP OF TANK 0 LBS
BALLAST PROVIDED ON TOP OF TANK: I 0.0 CU.YDSj
BALLAST PROVIDED WITHIN TANK: 0.0 CU.YD5I
TOTAL CU.YDS. OF CONCRETE BALLAST PROVIDED: 0.0 CUNDS
NO BALLAST REQUIRED
SAFETY FACTOR (TOTAL 1.2
DOWNFORCEITOTAL UPLIFT) =
WATER
62.4 LBS/CF
UNDISPLACED CONCRETE
144.0 LBS/CF
DISPLACED CONCRETE
81.6 LBS/CF
UNDISPLACED SOIL OVERBURDEN
100.0 LBS/CF
DISPLACED SOIL OVERBURDEN
37.6 LBS/CF
1) SOLVE FOR UPLIFT:
DEPTH SUBMERGED:
AREA OF UPLIFT SECTION:
TOTAL EXTERIOR UPLIFT'
2) SOLVE FOR DOWNFORCES:
TANK WEIGHT:
END SECTIONS:
MID SECTION:
REMOVE FOR OPENINGS:
VOLUME OF BAFFLE:
TOTAL CONCRETE VOLUME:
DOWN FORCE
SOIL OVERBURDEN: (UNSUBMERGED)
TOP OF TANK SQ.FT.
DEPTH UNSUBMERGED:
REMOVE FOR OPENINGS:
VOLUME OF UNDISPLACED SOIL:
DOWNFORCE UNSUBMERGED SOIL:
REMOVE FOR BALLAST ADDITION
BALLAST DEPTH (UNSUBMERGED):
BALLAST WEIGHT (UNSUBMERGED)
DOWNFORCE:
SOIL OVERBURDEN: (SUBMERGED)
TOP OF TANK SQ.FT.:
DEPTH SUBMERGED:
REMOVE FOR OPENINGS:
VOLUME OF UNDISPLACED SOIL:
DOWNFORCE SUBMERGED SOIL:
REMOVE FOR BALLAST ADDITION:
BALLAST DEPTH (SUBMERGED):
BALLAST WEIGHT (SUBMERGED)
DOWNFORCE:
4.67 FT
48.26 SQ.FT
981.22 CU.FT-
61,228 LBS UPLIFT
90.52 CU.FT.
437.19 CU.FT.
4.97 CU.FT.
0.00 CU.FT.
522.74 CU.FT.
75,274 LBS DOWN FORCE
210.11 SQ.FT.
-0.70 FT
14.14 SQ.FT.
0.00 CU.FT.
0 LBS DOWN FORCE
0.00 CU.FT.
0 INCHES DEPTH
0 LBS DOWN FORCE
0 LBS DOWN FORCE
0.00 SQ.FT.
0.00 FT
0.00 SQ.FT.
0,00 CU.FT.
0 LBS DOWN FORCE
0.00 CU.FT.
0 INCHES DEPTH
0 LBS DOWN FORCE
0 LBS DOWN FORCE
CONC. RISER WEIGHT: (FOR ACCESS OPENINGS)
0 LBS DOWN UNSUBMERGED, RISERS:
0.00 CU.FT.
0 I -SS DOWN Ff-V--- SUBMERGED RISERS:
0.00 CU.FT.
RISER DOWNFORCE:
0 LBS DOWN FORCE
MANHOLE RING & COVER WEIGHT: 630 LBS DOWN FORCE
ACCESS HATCH WEIGHT
70 LBS DOWN FORCE
BALLAST ADDITION:
0.0cu.YDS
LBS t UNSUBMERGED BALLAST*
0.00 CU.FT.
)Lusc SUBMERGED BALLAST:
0.00 CU.FT.
BALLAST DOWNFORCE:
0 LBS DOWN FORCE

BUOYANCY CALCUATIONS FOR EQUALIZATION TANK 2 (EMPTY TANK)
PROJECT: P15055-STEVENS TOWING BARGE PORT
3t27/20 4:39 PM
INTERNAL LENGTH:
1-90FT
SIDE WALL THICKNESS:
o.�077FT
EXTERIOR TANK LENGTH:
20.33 FT
INTERNAL DEPTH:
4.99 FT
TOP THICKNESS
0.79 FT
BOTTOM THICKNESS
0.79 FT
EXTERIOR DEPTH
6.57 FT
INTERNAL WIDTH:
9.00 FT
SIDE WALL THICKNESS:
0.67 FT
EXTERIOR TANK WIDTH:
10.33 FT
INTERIOR AREA REMOVED(octagonal tanks):
0.00 SQ.FT.
EXTERIOR AREA REMOVED:(octagonal tanks):
00 §.�T
INTERIOR SECTIONAL AREA:
44.88 SQ.FT.
EXTERIOR SECTIONAL AREA:
67.89 SQ.FT.
ROUND OPENING DIAMETER
NUMBER OF ROUND ACCESSES
RECTANGULAR OPENING LENGTH
RECTANGULAR OPENING WIDTH
NUMBER OF RECTANGULAR ACCESS
ROUND RISER THICKNESS
ROUND RISER HEIGHT
RECTANGULAR RISER THICKNESS
RECTANGULAR RISER HEIGHT
TOP TANK ELEVATION:
TOP GROUND ELEVATION:
WATER SATURATION ELEVATION:
BOTTOM TANK ELEVATION
BAFFLE VOLUME:
SPECIFIC WEIGHT OF ACCESS HATCH(S)
2.00 FT
I
3.00 FT
3.00 FT
0.50 FT
0.00 FT
0.50 FT
0.50 FT
11.90 FT (MSL)
11.20 FT (MSL)
10.00 FT (MSL)
5.33 FT (MSL)
0.00 CU.
70 LB
UPLIFT CREATED: 61,228 LBS UPLIFT
TOTAL DOWNFORCE (NO BALLAST): 75,495 LBS DOWN FORCE
TOTAL DOWNFORCE (WITH BALLAST) 75,495 LBS DOWN FORCE
NO BALLAST REQUIRED
DOWNFORCE REQUIRED: NO BALLAST ON TOP OF TANK
NO BALLAST ON TOP OF TANK 0 LBS
BALLAST PROVIDED ON TOP OF TANK,I 0.0 CU.YDS
BALLAST PROVIDED WITHIN TANK: 0.0 CU.YDS
TOTAL CU.YDS. OF CONCRETE BALLAST PROVIDED: 0.0 CU,YDS
NO BALLAST REQUIRED
SAFETY FACTOR (TOTAL 1.2
DOWNFORCErrOTAL UPLIFT) =
WATER
62.4 LBSICF
UNDISPLACED, CONCRETE
144.0 LBS/CF
DISPLACED CONCRETE
81.6 LBS/CF
UNDISPLACED SOIL OVERBURDEN
100.0 LBS/CF
DISPLACED SOIL OVERBURDEN
37.6 LBS/CF
1) SOLVE FOR UPLIFT:
DEPTH SUBMERGED:
4.67 FT
AREA OF UPLIFT SECTION:
48.26 SQ.FT.
TOTAL EXTERIOR UPLIFT:
981.22 CU.FT.
61,228 LBS UPLIFT
2) SOLVE FOR DOWNFORCES:
TANK WEIGHT:
END SECTIONS:
90.52 CU.FT.
MID SECTION:
437.19 CU.FT
REMOVE FOR OPENINGS:
9A1 CU.FT.
VOLUME OF BAFFLE:
0.00 CU.FT.
TOTAL CONCRETE VOLUME:
518.10 CU.FT.
DOWN FORCE
74,606 LBS DOWN FORCE
SOIL OVERBURDEN: (UNSUBMERGED)
TOP OF TANK SQ.FT.
210.11 SQ.FT.
DEPTH UNSUBMERGED:
-0.70 FT
REMOVE FOR OPENINGS:
19.32 SQ.FT.
VOLUME OF UNDISPLACED SOIL:
0.00 CU.FT.
DOWNFORCE UNSUBMERGED SOIL:
0 LBS DOWN FORCE
REMOVE FOR BALLAST ADDITION
0.00 CU.FT.
BALLAST DEPTH (UNSUBMERGED):
0 INCHES DEPTH
BALLAST WEIGHT (UNSUBMERGED)
0 LBS DOWN FORCE
DOWNFORCE,
0 LBS DOWN FORCE
SOIL OVERBURDEN: (SUBMERGED)
TOP OF TANK SQ.FT.:
0.00 SQ.FT.
DEPTH SUBMERGED:
0.00 FT
REMOVE FOR OPENINGS:
0.00 SQ.FT.
VOLUME OF UNDISPLACED SOIL:
0.00 CU.FT.
DOWNFORCE SUBMERGED SOIL:
0 LBS DOWN FORCE
REMOVE FOR BALLAST ADDITION:
0.00 CU.FT.
BALLAST DEPTH (SUBMERGED):
0 INCHES DEPTH
BALLAST WEIGHT (SUBMERGED)
0 LBS DOWN FORCE
DOWNFORCE:
0 LBS DOWN FORCE
CONC. RISER WEIGHT: (FOR ACCESS OPENINGS)
UNSUBMERGED RISERS:
3.50 CU.FT.
SUBMERGED RISERS:
0.00 CU.FT.
RISER DOWNFORCE:
504 LBS DOWN FORCE
MANHOLE RING & COVER WEIGHT:
315 LBS DOWN FORCE
ACCESS HATCH WEIGHT
70 LBS DOWN FORCE
BALLAST ADDITION: 0.0 cu. YDS
UNSUBMERGED, BALLAST: 0.00 CU.FT.
SUBMERGED BALLAST. 0.00 CU.FT.
BALLAST DOWNFORCE! 0 LBS DOWN FORCE

PROJECT: P15055-STEVENS TOWING BARGE PORT
3127120 4:49 PM
INTERNAL LENGTH:
SIDE WALL THICKNESS:
EXTERIOR TANK LENGTH:
INTERNAL DEPTH:
TOP THICKNESS
BOTTOM THICKNESS
EXTERIOR DEPTH
INTERNAL WIDTH:
SIDE WALL THICKNESS:
EXTERIOR TANK WIDTH:
INTERIOR AREA REMOVED(octagonal tanks):
EXTERIOR AREA REMOVED:(octagonal tanks):
INTERIOR SECTIONAL AREA:
EXTERIOR SECTIONAL AREA:
ROUND OPENING DIAMETER
NUMBER OF ROUND ACCESSES
RECTANGULAR OPENING LENGTH
RECTANGULAR OPENING WIDTH
NUMBER OF RECTANGULAR ACCESS
ROUND RISER THICKNESS
ROUND RISER HEIGHT
RECTANGULAR RISER THICKNESS
RECTANGULAR RISER HEIGHT
TOP TANK ELEVATION:
TOP GROUND ELEVATION:
WATER SATURATION ELEVATION:
BOTTOM TANK ELEVATION
BAFFLE VOLUME:
SPECIFIC WEIGHT OF ACCESS HATCH(S)
BUOYANCY CALCUATIONS FOR SEPTIC TANK (EMPTY TANK)
19.00 FT
0.67 FT
20.33 FT
12.17 FT
0.79 FT
0.79 FT
13.75 FT
9,00 FT
0.67 FT
10.33 FT
0.00 SQ.FT.
0.00 SQ.FT.
109.50 SQ.FT.
142.08 SQ.FT.
2.00 FT
2.00 FT
4.00 FT
0.50 FT
0.00 FT
0.50 FT�
0.00 FT
19.08 FT (MSL)
15.58 FT (MSL)
13.00 FT (MSL)
5.33 FT (MSL)
54.94 CU.FT.
85 LBS
UPLIFT CREATED: 100,561 LBS UPLIFT
TOTAL DOWNFORCE (NO BALLAST): 123,469 LBS DOWN FORCE
TOTAL DOWNFORCE (WITH BALLAST) 123,469 LBS DOWN FORCE
NO BALLAST REQUIRED
DOWNFORCE REQUIRED: NO BALLAST ON TOP OF TANK
NO BALLAST ON TOP OF TANK 0 LBS
BALLAST PROVIDED ON TOP OF TANKI 0.0 CU.YDS
BALLAST PROVIDED WITHIN TANK-] 0.0 CU.YDS
TOTAL CU.YDS. OF CONCRETE BALLAST PROVIDED: 0.0 CU.YDS
NO BALLAST REQUIRED
SAFETY FACTOR (TOTAL 1.2
DOWNFORCEITOTAL UPLIFT) =
WATER
62.4 LBS/CF
UNDISPLACED CONCRETE
144.0 LBS/CF
DISPLACED CONCRETE
81.6 LBS/CF
UNDISPLACED, SOIL OVERBURDEN
100.0 LBS/CF
DISPLACED SOIL OVERBURDEN
37.6 LBS/CF
1) SOLVE FOR UPLIFT:
DEPTH SUBMERGED:
7.67 FT
AREA OF UPLIFT SECTION:
79.26 SQ.FT.
TOTAL EXTERIOR UPLIFT:
1611.55 CU.FT.
100,561 LBS UPLIFT
2) SOLVE FOR DOWNFORCES:
TANK WEIGHT:
END SECTIONS:
189.44 CU.FT.
MID SECTION:
619.08 CU.FT.
REMOVE FOR OPENINGS:
8.82 CU.FT.
VOLUME OF BAFFLE:
54.94 CU.FT.
TOTAL CONCRETE VOLUME:
854.65 CU.FT.
DOWN FORCE
123,069 LBS DOWN FORCE
SOIL OVERBURDEN: (UNSUBMERGED)
TOP OF TANK SQ.FT.
210.11 SQ.FT.
DEPTH UNSUBMERGED:
-3.50 FT
REMOVE FOR OPENINGS:
18.32 SQ.FT.
VOLUME OF UNDISPLACED SOIL:
0.00 CU.FT.
DOWNFORCE UNSUBMERGED SOIL:
0 LBS DOWN FORCE
REMOVE FOR BALLAST ADDITION
0.00 CU.FT.
BALLAST DEPTH (UNSUBMERGED):
0 INCHES DEPTH
BALLAST WEIGHT (UNSUBMERGED)
0 LBS DOWN FORCE
DOWNFORCE.
0 LBS DOWN FORCE
SOIL OVERBURDEN: (SUBMERGED)
TOP OF TANK SQ.FT.:
0.00 SQ.FT.
DEPTH SUBMERGED:
0.00 FT
REMOVE FOR OPENINGS:
0.00 SQ.FT.
VOLUME OF UNDISPLACED SOIL:
0.00 CU.FT.
DOWNFORCE SUBMERGED SOIL:
0 LBS DOWN FORCE
REMOVE FOR BALLAST ADDITION:
0.00 CU.FT.
BALLAST DEPTH (SUBMERGED):
0 INCHES DEPTH
BALLAST WEIGHT (SUBMERGED)
0 LBS DOWN FORCE
DOWNFORCE
0 LBS DOWN FORCE
CONC. RISER WEIGHT: (FOR ACCESS OPENINGS)
UNSUBMERGED, RISERS:
0.00 CU,FT,
SUBMERGED RISERS:
0.00 CU.FT.
RISER DOWNFORCE:
0 LBS DOWN FORCE
MANHOLE RING & COVER WEIGHT:
315 LBS DOWN FORCE
ACCESS HATCH WEIGHT
85 LBS DOWN FORCE
BALLAST ADDITION: 0.0 CU.YDS
UNSUBMERGED, BALLAST: 0.00 CU.FT.
SUBMERGED BALLAST: 0.00 CU.FT.
BALLAST DOWNFORCE: 0 LBS DOWN FORCE

BUOYANCY CALCUATIONS FOR SEPTIC TANK (FULL TANK)
PROJECT: P15055-STEVENS TOWING BARGE PORT
3127r/O 4' .49 PM
INTERNAL LENGTH:
19.00 FT
SIDE WALL THICKNESS:
0.671-1
EXTERIOR TANK LENGTH:
20.33 FT
INTERNAL DEPTH:
IZ17FT
TOP THICKNESS
0.79 FT
BOTTOM THICKNESS
0.79 FT
EXTERIOR DEPTH
13.75 FT
INTERNAL WIDTH:
9.00 FT
SIDE WALL THICKNESS:
0.67 FT
EXTERIOR TANK WIDTH:
10.33FT
INTERIOR AREA REMOVED(octagonal tanks); 1
0.00 SQ.FT.
EXTERIOR AREA REMOVED:(octagonal tanks): 1
0.00 SQ.FT. I
INTERIOR SECTIONAL AREA:
109.50SQ,FT.
EXTERIOR SECTIONAL AREA:
142.08 SQ.FT.
ROUND OPENING DIAMETER
2.00 FT
NUMBER OF ROUND ACCESSES
I
RECTANGULAR OPENING LENGTH
2.00 FT
RECTANGULAR OPENING WIDTH
4.00 FT
NUMBER OF RECTANGULAR ACCESS
I
ROUND RISER THICKNESS
0.50 FT
ROUND RISER HEIGHT
0.00 FT
RECTANGULAR RISER THICKNESS
0.50 FT
RECTANGULAR RISER HEIGHT
0.00 FT
TOP TANK ELEVATION;
19,08 FT (MSL)
TOP GROUND ELEVATION:
15.58 FT (MSL)
WATER SATURATION ELEVATION:
19.50 FT (MSL)
BOTTOM TANK ELEVATION
5.33 FT(MSL)
BAFFLE VOLUME:
54.94 CU.FT
SPECIFIC WEIGHT OF ACCESS HATCH(S)
85 LBS
ELEVATION OF WATER IN TANK
17.50 FT
VOLUME INTANK
1894.49 CU.FT.
SPECIFIC WEIGHT OF WATER IN TANK
118,216 LBS DOWN FORCE
UPLIFT CREATED: 185,782 LBS UPLIFT
TOTAL DOWNFORCE (NO BALLAST): 218,832 LBS DOWN FORCE
TOTAL DOWNFORCE (WITH BALLAST) 216,832 LBS DOWN FORCE
NO BALLAST REQUIRED
DOWNFORCE REQUIRED: NO BALLAST ON TOP OF TANK
NO BALLAST ON TOP OF TANK 0 LBS
BALLAST PROVIDED ON TOP OF TANK: 1 0.0 CU.YDSI
BALLAST PROVIDED WITHIN TANK: 0.0 CU.YDSj
TOTAL CU.YDS. OF CONCRETE BALLAST PROVIDED: 0.0 CU.YDS
NO BALLAST REQUIRED
SAFETY FACTOR (TOTAL 12
DOWNPORCEITOTAL UPLIFT)
WATER
62.4 LBSICF
UNDISPLACED CONCRETE
144.0 LBSICF
DISPLACED CONCRETE
81.6 LBSICF
UNDISPLACED SOIL OVERBURDEN
100.0 LBSICF
DISPLACED SOIL OVERBURDEN
37.6 LBSICF
1) SOLVE FOR UPLIFT
DEPTH SUBMERGED:
14.17 FT
AREA OF UPLIFT SECTION:
146.42 SQ.FT.
TOTAL EXTERIOR UPLIFT:
2977.27 CU.FT.
185,782 LBS UPLIFT
2) SOLVE FOR DOWNFORCES:
TANK WEIGHT:
END SECTIONS:
189.44 CU.FT.
MID SECTION:
619.08 CU.FT.
REMOVE FOR OPENINGS:
8.82 CU.FT.
VOLUME OF BAFFLE:
54.94 CU.FT.
TOTAL CONCRETE VOLUME:
854.65 CU.FT.
DOWN FORCE
123,069 LBS DOWN FORCE
SOIL OVERBURDEN: (UNSUBMERGED)
TOP OF TANK SQ.FT.
210.11 SQ.FT.
DEPTH UNSUBMERGED:
0.00 FT
REMOVE FOR OPENINGS:
18.32 SQ.FT.
VOLUME OF UNDISPLACED SOIL:
0.00 CU.FT.
DOWNFORCE UNSUBMERGED SOIL:
0 LBS DOWN FORCE
REMOVE FOR BALLAST ADDITION
0.00 CU.FT.
BALLAST DEPTH (UNSUBMERGED):
0 INCHES DEPTH
BALLAST WEIGHT (UNSUBMERGED)
0 LBS DOWN FORCE
DOWNFORCE:
0 LBS DOWN FORCE
SOIL OVERBURDEN: (SUBMERGED)
TOP OF TANK SQ.FT.;
210.11 =FT.
DEPTH SUBMERGED;
-3.50 FT
REMOVE FOR OPENINGS:
18.32 SQ.FT.
VOLUME OF UNDISPLACED SOIL:
-671.27 CU.FT.
DOWNFORCE SUBMERGED SOIL:
-25,240 LBS DOWN FORCE
REMOVE FOR BALLAST ADDITION:
0.00 CU.FT.
BALLAST DEPTH (SUBMERGED):
0 INCHES DEPTH
BALLAST WEIGHT (SUBMERGED)
0 LBS DOWN FORCE
DOWNFORCE:
-25,240 LBS DOWN FORCE
CONIC. RISER WEIGHT: (FOR ACCESS OPENINGS)
UNSUBMERGED RISERS:
38.24 CU.FT.
SUBMERGED RISERS:
-38.24 CU.FT.
RISER DOWNFORCE:
2,386 LBS DOWN FORCE
MANHOLE RING & COVER WEIGHT
315 LBS DOWN FORCE
ACCESS HATCH WEIGHT
85 LBS DOWN FORCE
BALLAST ADDITION: O.OCU. YDS
UNSUBMERGED, BALLAST: 0.00 CU.FT.
SUBMERGED BALLAST* 0.00 CU.FT.
BALLAST DOWNFORCE: 0 LBS DOWN FORCE

BUOYANCY CALCUATIONS FOR DOSING TANK (EMPTY TANK)
PROJECT: P15055-STEVENS TOWING BARGE PORT
3/27/20 4:39 PM
INTERNAL LENGTH:
13.25 FT
SIDE WALL THICKNESS:
0.50 FT
EXTERIOR TANK LENGTH:
14.25 FT
INTERNAL DEPTH:
6.84 FT
TOPTHICKNESS
0.50 FT
BOTTOM THICKNESS
0.50 FT
EXTERIOR DEPTH
7.84 FT
INTERNAL WIDTH:
5.25 FT
SIDE WALL THICKNESS:
. FT
EXTERIOR TANK WIDTH:
6.25 FT
INTERIOR AREA REMOVED(octagonal tanks):
201050 SQ.FT.
EXTERIOR AREA REMOVED:(octagonal tanks):
§Q.FT.
INTERIOR SECTIONAL AREA:
35.89 SQ.FT.
EXTERIOR SECTIONAL AREA:
48.98 SQ.FT.
ROUND OPENING DIAMETER
NUMBER OF ROUND ACCESSES
RECTANGULAR OPENING LENGTH
RECTANGULAR OPENING WIDTH
NUMBER OF RECTANGULAR ACCESS
ROUND RISER THICKNESS
ROUND RISER HEIGHT
RECTANGULAR RISER THICKNESS
RECTANGULAR RISER HEIGHT
TOP TANK ELEVATION:
TOP GROUND ELEVATION:
WATER SATURATION ELEVATION:
BOTTOM TANK ELEVATION
BAFFLE VOLUME:
SPECIFIC WEIGHT OF ACCESS HATCH(S)
2.00 FT
1
5.50 FT
4.00 FT
1
0.00 FT
0.00 FT
OZO FT��
0.50 FT
14.71 FT (MSL)
14.46 FT (MSL)
11.70 FT (MSL)
6.87 FT (MSL)
9.60 cu.
141 LBS��
UPLIFT CREATED: 26,843 LBS UPLIFT
TOTAL DOWNFORCE (NO BALLAST): 32,808 LBS DOWN FORCE
TOTAL DOWNFORCE (WITH BALLAST) 32,808 LBS DOWN FORCE
NO BALLAST REQUIRED
DOWNFORCE REQUIRED: NO BALLAST ON TOP OF TANK
NO BALLAST ON TOP OF TANK 0 LBS
BALLAST PROVIDED ON TOP OF TANK:I 0.0 CU.YDS
BALLAST PROVIDED WITHIN TANK:0.0 CU.YDS
TOTAL CU.YDS. OF CONCRETE BALLAST PROVIDED: 0.0 CU.YDS
NO BALLAST REQUIRED
SAFETY FACTOR (TOTAL 1.2
DOWNFORCFJTOTAL UPLIFT) =
WATER
62.4 LBSICF
UNDISPLACED CONCRETE
144.0 LBSICF
DISPLACED CONCRETE
81.6 LBSICF
UNDISPLACED SOIL OVERBURDEN
100.0 LBSICF
DISPLACED SOIL OVERBURDEN
37,6 LBSICF
1) SOLVE FOR UPLIFT
DEPTH SUBMERGED:
4.83 FT
AREA OF UPLIFT SECTION:
30.19 SQ.FT.
TOTAL EXTERIOR UPLIFT:
430.17 CU.FT.
26,843 LBS UPLIFT
2) SOLVE FOR DOWNFORCES:
TANK WEIGHT:
END SECTIONS:
48.98 CU.FT.
MID SECTION:
173.40 CU.FT.
REMOVE FOR OPENINGS:
12.57 CU.FT.
VOLUME OF BAFFLE:
9.60 CU.FT.
TOTAL CONCRETE VOLUME:
219.41 CU.FT.
DOWN FORCE
31,596 LBS DOWN FORCE
SOIL OVERBURDEN: (UNSUBMERGED)
TOP OF TANK SQ.FT.
89.06 SQ.FT.
DEPTH UNSUBMERGED:
-0.25 FT
REMOVE FOR OPENINGS:
30.14 SQ.FT.
VOLUME OF UNDISPLACED SOIL:
0.00 CU.FT.
DOWNFORCE UNSUBMERGED SOIL:
0 LBS DOWN FORCE
REMOVE FOR BALLAST ADDITION
0.00 CU.FT.
BALLAST DEPTH (UNSUBMERGED):
0 INCHES DEPTH
BALLAST WEIGHT (UNSUBMERGED)
0 LBS DOWN FORCE
DOWNFORCE!
0 LBS DOWN FORCE
SOIL OVERBURDEN: (SUBMERGED)
TOP OF TANK SQ.FT.:
0.00 SQ.FT.
DEPTH SUBMERGED:
0.00 FT
REMOVE FOR OPENINGS:
0.00 SQ.FT.
VOLUME OF UNDISPLACED SOIL:
0.00 CU.FT.
DOWNFORCE SUBMERGED SOIL:
0 LBS DOWN FORCE
REMOVE FOR BALLAST ADDITION:
0.00 CU.FT.
BALLAST DEPTH (SUBMERGED):
0 INCHES DEPTH
BALLAST WEIGHT (SUBMERGED)
0 LBS DOWN FORCE
DOWNFORCE,
0 LBS DOWN FORCE
CONC. RISER WEIGHT: (FOR ACCESS OPENINGS)
UNSUBMERGED RISERS:
5.25 CU.FT.
SUBMERGED RISERS:
0.00 CU.FT.
RISER DOWNFORCE:
756 LBS DOWN FORCE
MANHOLE RING & COVER WEIGHT:
315 LBS DOWN FORCE
ACCESS HATCH WEIGHT
141 LBS DOWN FORCE
BALLAST ADDITION: 0.0 CU.YDS
UNSUBMERGED BALLAST: 0.00 CU.FT.
SUBMERGED BALLAST: 0.00 CU.FT,
BALLAST DOWNFORCE: 0 LBS DOWN FORCE

Hazen -Williams Equation for Pressure Loss in Pipes (hf):
10.44(L)(OA1.852)
CA1.852*dA4.865555
PROPOSED FLOW CAPACITY: 1 78.51
hf for 4.03 inch dia. Pipe
a
TDH
C = Hazen -Williams roughness constant
120
0
68.300
Q = volume flow (gal/min)
78.500 FACTOR:
25
69.308
d = Pipe diameter (inches)
4.026
50
71.935
L = Pipe Length
783
75
75.996
hs + hp (static + pressure head)
68.30
100
81.404
hf = Pressure loss through pipe
4.224 FACTOR:
1 1.251 hf = 5.2801
125
88.101
150
96.044
hf for 2.07 inch dia. Pipe
175
105.199
C = Hazen -Williams roughness constant
120
200
115,539
Q = volume flow (gal/min)
19.625 FACTOR:
0.250
225
127.040
d = Pipe diameter (inches)
2.067
250
139.682
L = Pipe Length
201
275
153.446
hs + hp (static + pressure head)
000
300
168.317
hf = Pressure loss through pipe
2.145 FACTOR:
1 1.251 hf = 2.681
325
184.280
350
201.322
hf for 0.72 inch dia. Pipe
375
219.432
C = Hazen -Williams roughness constant
120
400
238.598
Q = volume flow (gal/min)
3.271 FACTOR:
r-0704-21
425
258.810
d = Pipe diameter (inches)
0.72
450
280.059
L = Pipe Length
5
475
302.336
hs + hp (static + pressure head)
0.00
500
325.632
hf = Pressure loss through pipe
0.330 FACTOR:
1 1.251 hf - 5741-2
525
349.939
550
375252
hf for 0.75 inch dia. Pipe
575
401.561
C = Hazen -Williams roughness constant
120
600
428.861
Q = volume flow (gal/min)
3.271 FACTOR:
r0.0421
625
457.145
d = Pipe diameter (inches)
0.75
650
486.408
L = Pipe Length
0.00
675
516.643
hs + hp (static + pressure head)
0
700
547.846
hf = Pressure loss through pipe
0.000 FACTOR.
1 1.251 hf = 0.0001
725
580.010
750
613.131
775
647.205
8.37351304806
800
682.225
825
718.188
850
755.090
875
792.926
900
831.692
925
871.384
CHECK
TOTAL TDH (hs + hp + hf = TDH)
76.67
78.5 1
76.674

Technical Information
TP53M80U2/3
Operating data
Row
Head
Shaft power P2
Pump efficiency
Required pump NPSH
Pumpe type
No. of pumps
Fluid
Pump
Pump Code
Impeller
Impeller size
Solid size
Discharge port
Suction port
Motor
Rated voltage
Frequency
Rated power P2
Rated speed
Number of poles
Efficiency
Rated current
Degree of protection
80 US g.p.m.
100 ft
4.44 hp
45.4%
Single pump
I
Water
TP53M80L/2/3
Single vane impeller
5114"
2 inch
3" - 8 NPT
230/ 460V
60 H2
7.0 hp
3450 rpm
2
87%
1718,5A
IP 68
'nilsmr4
`1110
P U M P E N M I T S Y S T E M
Testnorm: HI Standard Sect 11.6.5.4
[%] Efficiency ... M801-1/2/3
50 . .... . ---J--
40 --------
30
20
10
O=
: Shaft power P2 801-/2/3
[hp]-
4-
2
0-1 . . . . . I . . . I . . . . . . . . . . . . .
0 40 80 120 160 200 [US g.p.m
Wet well installation with coupling Idt 3" ANSI (80)
Dimensions in mm [inch], letters see table
��u
Materials
Motor housing
Cast Iron ASTM A48;CI.40B
Impeller
Cast Iron ASTM A48;CIA0B
Pump housing
Cast Iron ASTM A48;CI.40B
r",
Wear ring
Bronze ASTM B505; C93200
Motorshaft
AISI 430 F Stainless Steel
Bolts
AISI 304 Stainless Steel
O-Rings
Nitrile Rubber
Mechanical seal
on medium side sic/sic
7—
Mechanical seal
on motor side Sift Sic
Lower Bearing
Two angular ball bearings
Upper Bearing
Deep Groove Ball Bearing
Table Dimensions
(inch
Project
I
Project no.:
I
Created by:
I
Page
I
Date:
1
1
214/2020

Performance Curve 101 M R
TP53M80U2/3
P U M P E N M 1 T S Y S T E M
Impeller
Impellertype:
Solid size
0: Max. 0:
Min. 0: Sal. 0:
Single vane impeller
2 inch
511/16"
4" 5/4"
Operating data
Speed: Frequency:
Duty point:
Shaft power P2:
Discharge port:
3450 rpm 60 Hz
Q=80USg.p.m.
H=100ft
4.44 hp
3" - 8 NPT
Power data referred to:
Testnorm: HI Standard Sect. 11.6.5.4
Water [100%] ; 68°F; 62.322lb/ft3; 1.0818E-5ft2/s
If t1- Head
125-
120- 6 111§0
115
105
100
.......
.....
95
90
8
— ------
80
7
---- ---
70-
65-
60-
. . .. .....
55-
50-
45-
......
------
40
35-
30-
25-
2&
— - - -
- - - ---------
15
10,
0
Efficiency
--- WOH2/3
50
3
20-
--- ---
10
[hp]:
... MBGL/213
4�
3
0 20 40
60 80
100 120 140
160 180 200
220 240 [US g.p.m]
Project
I
Project no.
I
Created by:
1
Page:
1
2
2/4/2020

Dimensions
TP53M8OU2I3
1111111"MR
%wo
P U M P E N M I T S Y S T E M
Wet well installation Afith coupling kit 3" ANSI (80)
Dimensions in mm [inch], letters see table
eas
Lkw. rdIh. ,y2
na �tt7
�af2M 13ya7
y I ddl 01s �
fa0 '
I
i
[Owl
va7
IX MIO
Od
.ae I
w p5 i I
DEL
x �
aea 2e2
Ins pan I�oa2y
®e
d 20
�= I
210
la �a
Table Dimensions ( inch)
a
m
0
N
O
h
O
N
Protect
Project no.
Created by
Page:
Date: —]
3
2/4/2020

Technical Data
TP53M8OU2/3
P U M P E N M IT S Y S T E M
Operating data 4m,
Flow 7ow
low
80 US g.pAIS g.p.m.
Head
100 ft ft
haft power P2
Shaft
4.4 hp
Static head
0 ft
Pump efficiency
45.4 %
Required pump NPSH
ft
Pumpe type
Single pump
No. of pumps
I
Fluid
Water
Temperature
68 -F
Density
62.31 1 b/ft3
Kin. viscosity
1.077E-5 ft2jS
Pump -1k
Pump Code
TP53M80IJ213
Speed
3450 rpm
Suction port
Head Max.
Min.
122.7 ft
Discharge port
3" - 8 NPT
68.9 ft
Impellertype
Single vane impeller
Flow Max.
233.4 US g.p.m.
Solid size
2 inchl
Pump efficiency max.
59.4 %
ImpellerO
5.28 inch
I Required rated power max. P2
7.0 hp
Motor
Motordesign
Submersible motor
Insulation class
H
Motor name
AM136.8,0/2/3
Degree of protection
IP 68
Frequency
60 Hz
Temperature class
T4
Rated power P1
8.0 hp
NEMA code
F
Rated power P2
7.0 hp
Explosion protection
Rated speed
3450 rpm
100%
Efficiency 75%
at % rated power
50%
87.0 %
Rated voltage
230
%
Rated current
—
17.0 /8,5 A
%
Starting current, direct starting
140.6 A
100%
cosphi 75%
at % rated power —
50%
0.90
Starting current, star -delta
4( A
Starting mode
Directly
Powercable
4G1,5
Control cable
Type of power cable
H07RN8-F PLUS
Type of control cable
Cable length
32.809 It
Service factor
1.15
Shaft seat
Mechanical seal on medium side sic/sic
Mechanical seal on motor side sic/sic
Bearing
Lower Bearing Two angular ball bearings
Upper Bearing Deep Groove Ball Bearing
Remarks
I
I I
Materials / Weight
M Motorhousing
Motorou g
71mpeller
Cast Iron ASTM A48;CI.40B
Bolts
AISI 304 Stainless Steel
Pump housing
Pumpu,
Cast Iron ASTM A48;CI.40B
0-Rings
Nitrile Rubber
r
Cast Iron ASTM A48;CI.40B
Wear ring
Bronze ASTM B505; C9320C
Motorshaft
AISI 430 F Stainless Steel
Weight aggragat
123.46 lb
Project
Project no.:
-1
Created by.
Page
I
Date:
I
4
2/41202

OPERATION AND MAINTENANCE REQUIREMENTS
I. GENERAL
Facility: PIN:6970-1841-4355
125 Dye Plant Rd.
Edenton, NC 27932
Stevens Towing Co. Riverbulk Terminal
2. Owner: Stevens Towing Co. of North Carolina, LLC
125 Dye Plant Rd.
Edenton, NC 27932
Phone: [phone]
Engineering Plans and Technical Specifications:
Plans and Specifications for this system were prepared by Quible and
Associates, P.C. and are hereby incorporated into this Agreement by
reference.
II. OPERATION AND MAINTENANCE REQUIREMENTS:
The Owner shall be responsible for contracting with a properly licensed operator to be the
operator -in -responsible charge (ORC) for this system.
2. The Owner shall keep the plumbing system in the facility in good repair and eliminate
leaks, drips, or excess flows as they are found.
The ORC shall inspect this system WEEKLY and provide inspection reports to the local
health department within 30 days of each ORC inspection.
4. Surface and subsurface water shall be diverted away from the tanks and spray irrigation
field. Outlets on diversion ditches and tile drainage tubes shall be kept open and free
flowing.
The septic tank shall be inspected monthly by the owner and ORC for leakage, blockage
of influent/effluent lines, structural integrity, condition of baffle and tee, condition of
risers if present, scum and solids levels, and effluent clarity.
The Effluent Filters for the septic tank shall be inspected weekly by the owner and ORC
and cleansed a minimum every two (2) months.
All Tankage shall be inspected monthly by the owner and ORC for leakage, structural
integrity, condition of riser(s), solids level and effluent clarity. Solids shall be removed
when solids are removed from the septic tank and when the solids level is up to the pump
intake level. Solids accumulation on the pump and floats shall be removed by hosing.
Pumps and electrical controls shall be inspected at least twice a year by the system
operator for pump presence and proper automatic functioning, floats/pipe/control
valves/union/anti-siphon hole in proper working condition, control panel/electrical
connections properly maintained and operational, highwater alarm present and operating

properly.
The sgptag_e generated from this system shall be disposed of in accordance with Article 9
of Chapter 130A 15A NCAC 13B et seq. and in a manner approved by the North
Carolina Division of Solid Waste Management.
10. Pump drawdown level (between on -float and off -float) and approximate dosing volume
shall be measured by the system operator at least twice a year and pump delivery rate
measured after each purging and pressure head adjustment (for all pumps — collection and
treatment).
11. The owner shall be responsible for assuring any broken pipe, lateral end caps or cleanouts
are to be repaired immediately after becoming aware of such a problem. Condition of all
pipe shall be evaluated by the operator during each inspection.
12. In the event of a power outage, all barge washdown operations shall cease, and the barge
maintenance bay and trench drain shall be immediately cleaned of all waste, including
debris and particulates, generated during washdown operations. Any waste, including
debris and particulates, that is not conveyed to the collection system, shall be disposed of
properly in accordance with the approved Residuals Management Plan. The control
valve to the wastewater treatment system shall be closed until power is restored to the
site.
13. Spill Prevention Provisions:
If a spill or leak were to occur, the material and/or liquid would remain in the general
area of the spill. Clean up of the released material would be accomplished using sorbent
materials. When spent, these sorbent materials would be disposed of in accordance with
appropriate regulations.
If an overflow or spill occurs and results in the material ponding or running
downgradient, then berming shall prevent the flow from spreading. Spill response
training shall be provided to responsible personnel to identify and respond to incidental
releases where the substance can be absorbed, neutralized, or otherwise controlled at the
time of the release by responsible personnel in the immediate release area.
An occurrence which results, or is likely to result, in an uncontrolled release of substance
requiring a response effort by personnel outside the immediate release area or by other
designated responders (i.e. mutual -aid groups, fire departments, etc) is considered an
emergency response and such occurrences shall only be addressed by the appropriate
qualified, trained personnel.
Preventative maintenance involving timely inspections and maintenance of the associated
facility as well as inspecting and testing facility equipment and systems to uncover
conditions that could cause breakdowns or failures resulting in discharges of pollutants to
surface waters, and ensuring appropriate maintenance of equipment and systems. Good
housekeeping requires maintaining in a clean, orderly manner all areas which may
contribute pollutants outside the permitted wastewater system. A key component to good
housekeeping is the proper training of personnel.
Any sewer overflow or spill over 1,000 gallons to the ground, or any amount of overflow
or spill that reaches surface water shall be reported to a Division of Water Resources,
Washington Regional Office staff member as soon as possible, but in no case more than
24 hours following first knowledge of the occurrence. The sewer overflow shall be
reported utilizing DWR Form CS-SSO and submitted to the Washington Regional Office

DWR within five business days of the first knowledge of the occurrence.
III. CONTROL OF SPRAY IRRIGATION APPLICATION RATES:
A rain gauge shall be kept on -site, and beginning each week of barge maintenance
activities, the rain gauge and the dosing flow meter shall be read and recorded in a log.
The on -site rain gauge and the dosing meter shall be relied upon to determine when the
control valve to the wastewater treatment system needs to be closed, and when closed, all
washdown operations shall cease. The valve shall remain open during the first one -inch
rainfall event so that the stormwater runoff will collect debris generated during
washdown activities, and will convey the debris to the trench drain and to the wastewater
treatment system. When the rain gauge indicates that 1.5-inches of rain have fallen
within a one -week time period, and/or the dosing meter indicates that the spray irrigation
field has been dosed with a volume approaching 19,665 gallons, then the control valve
shall be closed, the equalization and dosing pumps shall be turned off, and the system
shall not be used until a new week has begun, thus providing for a new application of
19,665 gallons to the spray irrigation field during the new one -week time period. Before
any event in which the control valve is closed, the barge maintenance bay shall be
cleaned of all debris generated from washdown activities.
IV. RESIDUALS MANAGEMENT PLAN
1. Residuals generated by the Stevens Towing Co. Riverbulk Terminal Wastewater
Treatment Plant, including sludge generated by the treatment process, and including
solids removed by the trench drain, equalization tank, septic tank, and final dosing tank,
shall be collected, hauled, and disposed of by a Department approved residuals
disposal/utilization program to a permitted location.
2. Once sludge has accumulated within the septic tank to a depth of 0.5 feet, then the tank
shall be pumped and disposed of by a Department approved residuals disposal/utilization
program to a permitted location.
3. The trench drain shall be cleaned when residuals have accumulated within the trench
drain, and before any instance in which the control valve is closed to the wastewater
treatment system.
4. The equalization tank and the final dosing tank shall be inspected and pumping of the
tanks shall be performed as appropriate.
5. Oil and grease generated during barge washdown activities shall be collected in the
wastewater treatment system. Oil and grease shall be pumped from the septic tank and
the equalization tank and shall be disposed of by an approved residuals disposal program
to a permitted location.

SHEET INDEX
WASTWA1 ?4;sxk Fi .. O O .�.Y,T., ]. fiTY U'
"s WFaS'EEWA ;m:R ELAN! & E"2ROPILE: ` OWRALL
E f^£'itiTSE'E"UCTION DEiTAMS
LOCATION MAP
CROW -AN COUNTY
TE VE NS TOWING CO. a
e.�
R;I VERBULK TERMINAL
&r g
o
LDENT� N, ,,NOIYAN ;OON I,, N
12,710 GPD WASTEWATER TREATMENT PLANT
AND LOW -RATE -SPRAY IRRIGATION DISPOSAL
P A¢
VICINITY MAP (CHOWAN COUNTY) GENERAL NOTES
?� fiTq@'i'lfr � It
o
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3 4�ifi'.JQ >11 F
W &
n+r rnrn>s
4 1 21'lIIQI "ImL'
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n
TO t
ruuwaa iSi.
/ 4 rA
{ _ ' y>
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PY5D53
4 � �
HOTE_THIS PUN SET SHALL BE USED FOR WASTEWATER SYSTEA ONLY. BKH
� l9
f NOTE ALL CONDITfONS, DUIOFLINESAND REQUIREMENTS TRQk KnP1t lYheiS be'Ow OTHERS BKH
THE PREVIOUSLY APPRDVEP NODEO ER0516N AND 1SEDIMENTATIONCall before 1 � � � � CONTROL PUNS fOR THIS PROJECT �a YW dig•
i' ! CHOWA 201J OOf, AND PUN N0. CHOWA 20f8 ODi) SHALL BE U2 21 iB
NOTE Allt.I, o.
iNE _ /£� i � VLTIFYLVC AIt Lfl'R. �TM6. TNfS.

' � � � i emus luu�x + I � • 'I P ! / 1 � - � 1� } _�
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VICINITY MAP Chowan County x Mcaaa
warn omcas) �
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'(>t �mcvw �' � Y / � l^� a "wrdyrcE ... � ff Jf�i •� � •f,�
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Nuswae - FK umasiq L�Ca��' �j.
�a
NOTE: SOIL IS CONSIDERED AN URBAN SOtL AS /`/�/ 1 �! © ,[,• a
- _ ` Fe/iy{i
fY£]D-OELIN£ATEO BY PRDiOCOt SpddPLING SERVICE, INC. 1 O z
/ 14
ER tfCENSED SOIL SCIENTIST (OAYfD E. MEYER. I
_ PROTOCOL SOON,u G SERVICE, 'z ), TNERE ARE NO
- IDE-11. AREAS WITHIN THE PROJECT AREA TNAT ARE
/ HtCi �t++yy NOT SUITABLE FOR
J- _ -------------
GRAPHIC SCALE
---- _ — , a
NQTM
�� PiSOSS
11 :rev:. -- --BKH
ar am anc - I cmr OTHERS BKH
t aNr� n � -_ to
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r e ! sr " NOTE: THIS PLAN SEi SHAM BE USED FOR WASTEWATER SYSTEM ONLY) } N.. TA , — A 5 BEUEH'n
I , uurvm ao rm. a'mw N.
NOTE: ALL COMPONS. GUIDELINES, AND REQUIREMENTS I—N v�"Ort WAgTV2 tEVfiR 0uT0i0NS ivv[A
f THE USLY PREVIOAPPROYEO NCOEO E .I. AND SEOIMENiAiIINiAND
CONtROL PLANS FOR N0. ND THIS --
(PLAN N0.m yl R
1 cNDWA ton OOr, APLAN (PLAN..
SHALL BE KROWWbBi,SIIC�OW'
taw. oc�.w N a+ APPLiCABEE. Call bdom YOU dig. To n SEE 1 wxr�u

_
_ _ _ _ _ _ _ _ _
_
P, a
_ _
_P
-----
I EQUALIZATION
TANK
-
�u ,'y EQUALIZATION � �
*. TANK ...
___
SEPTIC TANK
. ,
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I
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----
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SHEET
GRAPHIC
SCALE
SHEET 7
SHEET
SHEET6
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--
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GRAppPHICC SCALE
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:
-----------------------
sro �M
P15055
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MWS
HYDRAUUN
ICpPROFILE
NSSGUIOELlNENALL BE'EANDOREQUIREMENTSF BR -TER EM
NCDEO EROSIONAND SEDINENTATNNiTMSPR ""PN�KDowOW.ND
=�A
ONLY.NOT£�TROVED
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PLAN R.
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r 8KH
TWO (3) PT-548 - 6,370 GALLUNS
s OTHERS BKH
GRAPHIC SCALE
MN5
(pl ygRY)
NGTE' tH5 PLAN SEi SHALL BE USED FOR WASTEWATER SYSTEM ONLJ
NOTE:
f!ff AaiA 4YVEN ON w+rrs a r�aMvm
_
NOTE: ALL CONDIiO S. GUIDELINES D REQUIRE E FROM
THE PREVIOUSLY APPROVED NCDFQ EROSION AND 5EOIMENiATiON
CINITROL PLANS FOR THIS PROJECT (PLAN N0: KnmNRbaeSbelow.
CHOtYn 20f> OBi, AND PLAN NO. CHOWA-ZOtH-001) SHALL BE
Call befom Kg.
E
3YM LEYEtSLUCpSIM14eIYPES,
Pro.
4
APP ICAB E.
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OE � 973fiE'PB

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TANY{` etnm mu.wern,r.n. r7cwwnxU TANK
STB-538 - 14,000 GALLONS r o OBKTNHERS BKH
TWO (2) PT-548 - 6,370 GALLONS
un :.: NOTE: a..iSHliF`C NU.
NOTE THIS PLAN SET SHALL BE USED FOR WASTEWATER SYSTEM ONLY.or W Ttt to )x—Z ee[¢vm
NOTEALL CONDNWNS, GUIDELINES, AND RE00lREM£NTS FROM lbR tEVLts, n
THE PRE -OBEY APPROtl NC EO EROSRNI ANp SEDIMENTATION
ROL PLANS OR THIS PRDJEOi (PLAN NO. KNOWWf1e.be)OW. t eiuuYtt
Imali 6 .v5as CHOWA-201 ]-p0 AND PLAN N0. CHOWA T018-001} SHAG. BE Gall befam Ni WW APPLH:ABtE. � Y� dig.
01 7 sxir.'rs

U 5 Wz—
f 1 FINALDOSING TANK 5_; rWSb 63 F
l
STB-538 TANK i' P PT-377 3,528 CAL7ANS 'O oN NicNs„a
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r
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BKH
SEPTIC TANK FINAL DOSING TANK - x „ OTHERS Bql
STD 538 - 14,000 GALTANS PT-377 - 3,528 GALLONS .a,a
NWs
NOTE M15 PLAN SEF SHALL BE OSED FOR WASTEWATER SYSiEN MY. I NOTE a
INE PLN14 6 e[LLLVID
NOTE ALL SLY APONS OONELNES NO REOHNENENT5 11 it'YF1S ttMAltOtli
THE ROL POSLY APPkOYEO NC0E0 EROSION ARV SE014EMTAtYON MIO RINOI$(ON$ ai
CONTROL PLANS FOR
below.
OHOWA- 17-001, AND PLAN MO. OHOWA-20f8-O01) SHALL BE tRwtt Call befom LQ
APPLlOANLE. YaD d`

PERMANENT VEGETATION TEMPORARY VEGETATION P�4-ex
( uia,Emi (ertxun) .sear +Q e
L� � b6£ s N.164dmE crmtr+r w 18 - 4v ,Bf � O
N
4 r
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p.wf ..,.sr,. �.rre W Aw°„ww swr,.MT wt err «m o-t o
- r sruuvn,aw +xw mamv A u,E W�rranW zr J w Nn vwnrrumm cw Nu« u, om�nw,ss n,�
s. axo ,x r°ware nrNrzs aw cvsn.r mn xmre '0d, N iGN E`,1 u
TRANSITION FROM TRENCH DRAIN TO STORM PIPE MMNiENANGE REOUIREVENlS FXIEND BEYONU THE SEFP NO PHASE. (carnEre uaE A ww.n N wrv,wev a'srros'ss oz xuxsv
v¢sxaw vu,artn sro'ts oust e¢ w[uran, ,unussn uutarn, sxv atvmv is Pmmnv wa wv�a.c wn'vttwzAnax unr eE "i¢ asv m urwrnw Y " 181
vfiawCnuE Suwvs " T"
SEEDING SPECIFICATIONS '"
H G
/r`1 2em weunrzn au ,:c us � �E d M
mu avx„u. Wr q� i s � i s °o
c,nvr°3 f1pf - e�N.m m rremucrs ,,.' A � SY} Y�". 1 D
� mu °u muaotto [aur a. h F
W ac .. � w�� ovr wvm sees ec ru '
GRAVITY SEWER EMBEDMENT CONDITIONS��
FOR FLEXIBLE AND SEMI —RIGID SEWER PIPE °_+/r t ra t �" t n
NPE mm,,,.e. ooNFww, D AsrM D zsv /
IT
TYPICAL MANHOLE RING # WATERTIGHT MANHOLE INSERTS %c
COVER DETAILS
SILT FENCE DETAIL
GRAVITY SEWER EMBEDMENT CON01710NS
FOR RIGID SEWER PIPE
—„A.wAn«,ro «ro ,
,
ice.>/a'scxmrvc
SPRAY BED CROSS SECTION DETAILI'll I .71
W ro °m w, as7-5,
�°mro�r I� 1
-TYPICAL BACK_gTM REOUIREMENTS AND
TRENCH 80TtOM DIMENSIONS ---,Ewo,w <T� ro H,. SPRAY IRRIGATION 6E7AIL
.TYPICAL SEWER CLEAN —OUT
xi.x NOT£: THIS PLAN 5EI' SHALL 8E USED FOR WASTEWATER SYSTEM.PNLY. ® rltE WTA Sf
�'YC­
DITIDNS, G�I�
EVIOUSLY APPROVECONPLANS FORTHISN0. I(VOyJy�t•SFIBIOW,
CO0tJ-OOt, AHD 2Di8-001) SHALL BE xtuc VVON
APPLlCABIE. CBllhB(01'B ytIV dig.
0

q f f�J�0,a
A
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ryj III
IA -
I d
WrtB ViCIIiI'1'Y MAP (ChowanL"ounty)
10,1+ 4
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ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
NORTH CAROLINA
Environmental Quality
September 4, 2019
SIMON B. RICH, III — GENERAL MANAGER
STEVENS TOWING CO. OF NORTH CAROLINA, LLC
125 DYE PLANT ROAD
EDENTON, NORTH CAROLINA, 27932
Subject: Permit No. WQ0040672
Stevens Towing — Riverbulk
Terminal WWTF
Other Non -Discharge
Wastewater System
Chowan County
Dear Mr. Rich:
In accordance with your permit application request received February 25, 2019, and subsequent
additional information received June 13, 2019, we are forwarding herewith Permit No. WQ0040672 dated
September 4, 2019, to Stevens Towing Co. of North Carolina, LLC for the construction and operation of
the subject wastewater treatment and disposal facilities.
This permit shall be effective from the date of issuance through December 31, 2024, and shall be
subject to the conditions and limitations therein. The Permittee shall submit a renewal application no
later than July 4, 2024.
Please pay attention to the monitoring requirements listed Attachments A, B, and C. Failure to
establish an adequate system for collecting and maintaining the required operational information shall result
in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, the Permittee
has the right to request an adjudicatory hearing upon written request within 30 days following receipt of
this permit. This request shall be in the form of a written petition, conforming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings at 6714 Mail Service
Center, Raleigh, NC 27699-6714. Otherwise, this permit shall be final and binding.
One set of approved plans and specifications is being forwarded to you. If you need additional
information concerning this permit, please contact Ashley Kabat at [phone] or
ashle .kaba i ncdenr. ov.
Sincerely,
(ma Culpepper, Director
Division of Water Resources
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
NORTH CAMLINA a
, Q
o.wm.aae ftlft r 919.707.9000

Mr. Simon B. Rich, III
September 4, 2019
Page 2 of 2
cc: Chowan County Health Department (Electronic Copy)
Washington Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Michael W. Strader, Jr., PE — Quible & Associates, P.C. (Electronic Copy)
Beth Buffington — Protection and Enforcement Branch (Electronic Copy)
Laserfiche File (Electronic Copy)
Digital Permit Archive (Electronic Copy)
Central Files

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENTAL QUALITY
RALEIGH
OTHER NON -DISCHARGE WASTEWATER SYSTEM PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Stevens Towing Co. of North Carolina, LLC
Chowan County
FOR THE
construction and operation of a 12,710 gallon per day (GPD) wastewater treatment and disposal facility
consisting of:
an 11,539 gallon flow equalization tank with a baffle wall, dual 50 gallon per minute (GPM) submersible
pumps, floats, and a high-water alarm; a 15,653 gallon septic tank with a baffle wall and two effluent filters;
a 3,528 gallon dosing tank with a baffle wall and dual 157 GPM submersible pumps; an effluent flowmeter;
a 0.56 acre low -rate spray infiltration area containing 24 1.5 feet tall spray heads with a 32-foot wetted
diameter, and surrounded by a 1.9 foot berm; and all associated piping, valves, controls, and appurtenances
to serve the Stevens Towing — Riverbulk Terminal WWTF, with no discharge of wastes to surface waters,
pursuant to the application received February 25, 2019, subsequent additional information received June
13, 2019, and in conformity with the Division -approved plans and specifications considered a part of this
permit.
This permit shall be effective from the date of issuance through December 31, 2024, and shall be subject to
the following conditions and limitations:
I. SCHEDULES
Upon completion of construction and prior to operation of this permitted facility, the Permittee shall
submit an engineering certification from a North Carolina licensed Professional Engineer certifying
that the permitted facility has been constructed in accordance with G.S. 143-215.1, Administrative
Code Title 15A Subchapter 02T, this permit, and the Division -approved plans and specifications. For
phased and partially certified facilities, the Permittee shall retain the responsibility to track further
construction approved under this permit, and shall provide a final engineering certification upon project
completion. Mail the Engineering Certification to the Division of Water Resources, Non -Discharge
Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617, or N_ on-Discharge.Reports a,ncdenr.gov.
[ 15A NCAC 02T .0116(a)]
2. The Permittee shall notify the Washington Regional Office, telephone number [phone], at least
two business days in advance of initial operation of the constructed facilities so that the Division can
conduct a startup inspection. [15A NCAC 02T .0108(b)(1)(B)]
WQ0040672 Version 1.0 Shell Version 181205 Page 1 of 11

The Washington Regional Office, telephone number [phone], shall approve monitoring wells
MW-3 and MW-4 prior to installation, and the monitoring wells shall be installed prior to beginning
waste disposal operations. The Washington Regional Office shall be notified at least two business days
in advance of construction of any monitoring well. The monitoring wells shall be constructed such that
the water level in the well is never above or below the screened portion of the well, and in accordance
with 15A NCAC 02C .0108. The general location and Division -approved name for each monitoring
well is on Figure 1. [15A NCAC 02C .0108, 02T .0108(b)(1)(B)]
4. Within 90 days of completing installation of monitoring wells MW-1, MW-3, and MW-4, the Permittee
shall submit two original copies and one digital copy of a site map with a scale no greater than 1-inch
equals 100 feet; however, special provisions may be granted upon prior approval for large properties.
The map shall include the following information:
a. Legend, north arrow, scale, and legible in black and white.
b. Topographic contour intervals not exceeding 10 feet or 25 percent of total site relief.
c. All habitable residences or places of assembly within 500 feet of the disposal area.
d. Location of all wells, streams (ephemeral, intermittent, and perennial), springs, lakes, ponds,
ditches, and other surface drainage features within 500 feet of the disposal area.
e. Location and identification of each monitoring well (identify any background/upgradient wells).
f. Latitude and longitude coordinates of each monitoring well (decimal degrees to the sixth decimal
degree and in NAD83).
g. Location and identification of major components of the waste disposal system.
h. The perimeter of all disposal areas with site names (named according to the approved permit)
i. Location and ownership of property boundaries within 500 feet of the disposal area (including
road/rail right-of-ways and easements).
j. Latitude and longitude of the established horizontal control monument (decimal degrees to the sixth
decimal degree).
k. Elevation of the top of the well casing (i.e., measuring point) relative to a common datum.
1. Depth of water below the measuring point at the time the measuring point is established.
in. Delineation of the compliance and review boundaries.
n. Distance measurements verifying all setbacks are being met.
o. Stormwater drainage controls.
p. 100-year floodplain.
q. The date the map is prepared and/or revised.
Boundaries and physical features not under purview of other licensed professions shall be provided by
a Professional Surveyor. Control monuments shall be installed in such a manner and made of such
materials that the monument will not be destroyed due to activities taking place on the property. The
map and any supporting documentation shall be sent to the Division of Water Resources, Non -
Discharge Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617, or Non-
Dischar e.Re orts ncdenr. ov. [15ANCAC 02C .0105(f), 02T .0108(b)(1)(B)]
5. Within 30 days of construction, a Well Construction Record (Form GW-1) listing this permit number
and the appropriate monitoring well identification number shall be completed for each well constructed,
and mailed to the Division of Water Resources, Non -Discharge Branch, 1617 Mail Service Center,
Raleigh, NC 27699-1617, or Non-Discharge.Reportsa.ncdenr.gov. A North Carolina Certified Well
Contractor shall construct the monitoring wells according to the North Carolina Well Construction
Standards (15A NCAC 02C .0113) and local county rules. [15A NCAC 02C .0113, 02T
.0108(b)(1)(B)]
6. Within 60 days of the effective date of this permit, monitoring well MW-2 shall be permanently
abandoned. Within 30 days of abandonment, a Well Abandonment Record (Form GW-30) shall be
completed for each well abandoned, and mailed to the Division of Water Resources, Non -Discharge
Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617, or Non-Dischar e.Re orts ncdenr. ov.
A North Carolina Certified Well Contractor shall abandon the monitoring wells according to the North
Carolina Well Construction Standards (15A NCAC 02C .0113) and local county rules. [15A NCAC
02C .0113, 02T .0108(b)(1)(B)]
WQ0040672 Version 1.0 Shell Version 181205 Page 2 of 11

7. Prior to operation of the newly installed facilities, a Final Operation and Maintenance Plan shall be
submitted for review. The plan shall be sent to the Division of Water Resources, Non -Discharge
Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 or Non-Discharge.Reports a ncdenr.g_ov.
[15A NCAC 02T .0 1 08(b)(1)(B), 02T .0707(a), 02T .08071
8. Upon completion of construction and prior to disposal, a soil evaluation shall be completed for all areas
where fill material is placed within the permitted disposal areas. The report shall certify that areas
utilizing fill material are capable of accepting the designed loading rate. This report shall specifically
address, but not be limited to, soil features such as soil compaction and saturated hydraulic conductivity
of the least permeable layer, soil fertility report and any amendments added, verification of fill
suitability and depth of fill material (and to the seasonal high water table) across the site, as well as any
other properties that might impact the soil's ability to accept disposed water. The soil scientist
evaluation shall be mailed to the Division of Water Resources, Non -Discharge Branch, 1617 Mail
Service Center, Raleigh, NC 27699-1617 or Non-Dischar e.Re orts ncdenr. ov. Disposal shall not
occur until the Washington Regional Office approves the soils evaluation. [15A NCAC 02T
.0108(b)(1)(A)]
9. The Permittee shall request renewal of this permit on Division -approved forms no later than July 4,
2024. [15A NCAC 02T .0105(b), 02T .0109]
II. PERFORMANCE STANDARDS
The Permittee shall maintain and operate the subject non -discharge facilities so there is no discharge to
surface waters, nor any contravention of groundwater or surface water standards. In the event the
facilities fail to perform satisfactorily, including the creation of nuisance conditions due to improper
operation and maintenance, or failure of the disposal areas to assimilate the effluent, the Permittee shall
take immediate corrective actions, including Division required actions, such as the construction of
additional or replacement wastewater treatment or disposal facilities. [ 15A NCAC 02T .0108(b)(1)(A)]
2. This permit shall not relieve the Permittee of their responsibility for damages to groundwater or surface
water resulting from the operation of this facility. [15A NCAC 02T .0108(b)(1)(A)]
3. Groundwater monitoring wells shall be constructed in accordance with 15A NCAC 02C .0108
(Standards of Construction for Wells Other than Water Supply), and any other jurisdictional laws and
regulations pertaining to well construction. [ 15A NCAC 02C .0108]
4. Effluent quality shall not exceed the limitations specified in Attachment A. [15A NCAC 02T .0505(b),
02T .0805]
5. Application rates, whether hydraulic, nutrient, or other pollutant, shall not exceed those specified in
Attachment B. [15A NCAC 02T .0505(c), 02T .0505(n), 02T .0805]
6. Wastewater disposal sites permitted on or after December 30, 1983 have a compliance boundary that
is either 250 feet from the wastewater disposal area, or 50 feet within the property boundary, whichever
is closest to the wastewater disposal area. Any exceedance of groundwater standards at or beyond the
compliance boundary shall require corrective action. Division -approved relocation of the compliance
boundary shall be noted in Attachment B. Multiple contiguous properties under common ownership
and permitted ' for use as a disposal system shall be treated as a single property with regard to
determination of a compliance boundary. [15A NCAC 02L .0106(d)(2), 02L .0107(b), 02T .0105(h),
G.S. 143-215.1(i), G.S. 143-215:1(k)]
7. The review boundary is midway between the compliance boundary and the wastewater disposal area.
Any exceedance of groundwater standards at or beyond the review boundary shall require preventative
action. [15A NCAC 02L .0106(d)(1), 02L .0108]
WQ0040672 Version 1.0 Shell Version 181205 Page 3 of 11

8. The Permittee shall apply for a permit modification to establish a new compliance boundary prior to
any sale or transfer of property affecting a compliance boundary (i.e., parcel subdivision). [15A NCAC
02L .0107(c)]
9. No wells, excluding Division -approved monitoring wells, shall be constructed within the compliance
boundary except as provided for in 15A NCAC 02L .0107(g). [15A NCAC 02L .0107]
10. Except as provided for in 15A NCAC 02L .0107(g), the Permittee shall ensure any landowner who is
not the Permittee and owns land within the compliance boundary shall execute and file with the Chowan
County Register of Deeds an easement running with the land containing the following items:
a. A notice of the permit and number or other description as allowed in 15A NCAC 02L .4107(f)(1);
b. Prohibits construction and operation of water supply wells within the compliance boundary; and
c. Reserves the right of the Permittee or the State to enter the property within the compliance boundary
for purposes related to the permit.
The Director may terminate the easement when its purpose has been fulfilled or is no longer needed.
[15A NCAC 02L .0107(f)]
11. The facilities herein were permitted per the following setbacks:
a. The disposal sites were originally permitted September 4, 2019. The setbacks for disposal sites
originally permitted or modified on or after September 1, 2018 are as follows (all distances in feet):
i. Each habitable residence or place of assembly under separate ownership:
4001
ii. Each habitable residence or place of assembly owned by the Permittee:
200
iii. Each private or public water supply source:
100
iv. Surface waters:
200
v. Groundwater lowering ditches:
200
vi. Surface water diversions:
50
vii. Each well with exception of monitoring wells:
100
viii. Each property line:
150
ix. Top of slope of embankments or cuts of two feet or more in vertical height:
100
x. Each water line:
10
xi. Subsurface groundwater lowering drainage systems:
200
xii. Public right of way:
50
xiii. Nitrification field:
20
xiv. Each building foundation or basement:
15
xv. Each impounded public surface water supply:
500
xvi. Each public shallow ground water supply (less than 50 feet deep):
500
1 Habitable residences or places of assembly under separate ownership constructed after the
facilities herein were originally permitted or subsequently modified are exempt from this
setback.
2 Setbacks to property lines are not applicable when the Permittee, or the entity from which the
Permittee is leasing, owns both parcels separated by the property line.
[15A NCAC 02T .0706(a), 02T .0706(f), 02T .0706(g), 02T .0806]
WQ0040672 Version 1.0 Shell Version 181205 Page 4 of 11

b. The storage and treatment units were originally permitted September 4, 2019. The setbacks for
storage and treatment units originally permitted or modified on or after September 1, 2018 are as
follows (all distances in feet):
i. Each habitable residence or place of assembly under separate ownership: 1001
ii. Each private or public water supply source: 100
iii. Surface waters: 50
iv. Each well with exception of monitoring wells: 100
v. Each property line: 502
1 Habitable residences or places of assembly under separate ownership constructed after the
facilities herein were originally permitted or subsequently modified are exempt from this
setback.
2 Setbacks to property lines are not applicable when the Permittee, or the entity from which the
Permittee is leasing, owns both parcels separated by the property line.
[15A NCAC 02T .0506(b), 02T .0506(e), 02T .0506(f)]
OPERATION AND MAINTENANCE REQUIREMENTS
1. The Permittee shall operate and maintain the subject facilities as a non -discharge system. [15A NCAC
02T .0800]
2. The Permittee shall maintain an Operation and Maintenance Plan, which shall include operational
functions, maintenance schedules, safety measures, and a spill response plan. [15A NCAC 02T
.0707(a), 02T .0807]
3. Upon the Water Pollution Control System Operators Certification Commission's (WPCSOCC)
classification of the subject non -discharge facilities, the Permittee shall designate and employ a certified
operator in responsible charge (ORC), and one or more certified operators as back-up ORCs. The ORC
or their back-up shall operate and visit the facilities as required by the WPCSOCC. [15A NCAC 02T
.0117]
4. The Permittee shall take measures to prevent effluent ponding in or runoff from the disposal sites listed
in Attachment B. [15A NCAC 02T .0707(c), 02T .0807]
5. Disposal equipment shall be tested and calibrated once per permit cycle. [15A NCAC 02T .0707(d),
02T .0807]
6. Only treated effluent from the Stevens Towing — Riverbulk Terminal WWTF shall be disposed on the
sites listed in Attachment B. [15A NCAC 02T .0801]
The Permittee shall not allow vehicles or heavy machinery on the disposal area, except during
equipment installation or maintenance activities. [15A NCAC 02T .0707(e), 02T .0807]
8. The Permittee shall prohibit public access to the wastewater treatment, storage, and disposal facilities.
[15A NCAC 02T .0505(q), 02T .0805]
9. The Permittee shall dispose or utilize generated residuals in a Division -approved manner. [ 15A NCAC
02T .0708, 02T .0808, 02T. 1100].
10. The Permittee shall not divert or bypass untreated or partially treated wastewater from the subject
facilities. [15A NCAC 02T .05050), 02T .0805]
WQ0040672 Version 1.0 Shell Version 181205 Page 5 of 11

11. A protective vegetative cover shall be established and maintained on all berms, pipe runs, erosion
control areas, surface water diversions, and earthen embankments (i.e., outside toe of embankment to
maximum allowable temporary storage elevation on the inside of the embankment). Trees, shrubs, and
other woody vegetation shall not be allowed to grow on the earthen dikes or embankments. Earthen
embankments shall be kept mowed or otherwise controlled and accessible. [15A NCAC 02T .0707(g),
02T .0807]
12. Metering equipment shall be tested and calibrated annually. [ 15A NCAC 02T .0707(d), 02T .0807]
13. The disposal areas shall be cleaned at least once per permit cycle to remove deposited materials that
may impede the infiltration process. Cleaning records shall be maintained at the facility for five years,
and shall be made available to the Division upon request. The Washington Regional Office, telephone
number [phone], shall be notified prior to each cleaning. [15A NCAC 02T .0707(h), 02T .0807]
IV. MONITORING AND REPORTING RE - UIREMENTS
1. The Permittee shall conduct and report any Division required monitoring necessary to evaluate this
facility's impact on groundwater and surface water. [15A NCAC 02T .0108(c)]
2. A Division -certified laboratory shall conduct all analyses for the required effluent, groundwater, and
surface water parameters. [15A NCAC 02H .0800]
3. Flow through the treatment facility shall be continuously monitored, and daily flow values shall be
reported on Form NDMR. Facilities with a permitted flow less than 10,000 GPD may estimate their
flow from water usage records provided the water source is metered. [15A NCAC 02T .0105(k), 02T
.0108(c)]
4. The Permittee shall monitor the treated effluent at the frequencies and locations for the parameters
specified in Attachment A. [15A NCAC 02T .0108(c)]
5. The Permittee shall maintain records tracking the amount of effluent disposed. These records shall
include the following information for each disposal site listed in Attachment B:
a. Date of disposal;
b. Volume of effluent disposed;
c. Site applied;
d. Length of disposal time;
e. Loading rates to each disposal site listed in Attachment B; and
f. Weather conditions.
[15A NCAC 02T .0108(c)]
Three copies of all monitoring data (as specified in Conditions IV.3. and IVA.) on Form NDMR for
each PPI and three copies of all operation and disposal records (as specified in Condition IV.5.) on
Form NDAR-2 for every site in Attachment B shall be submitted on or before the last day of the
following month. If no activities occurred during the monitoring month, monitoring reports are still
required documenting the absence of the activity. All information shall be submitted to the following
address:
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[15A NCAC 02T .0105(1)]
WQ0040672 Version 1.0 Shell Version 181205 Page 6 of 11

7. The Permittee shall maintain a record of all residuals removed from this facility. This record shall be
maintained for five years, and shall be made available to the Division upon request. This record shall
include:
a. Name of the residuals hauler;
b. Non -Discharge permit number authorizing the residuals disposal, or a letter from a municipality
agreeing to accept the residuals;
c. Date the residuals were hauled; and
d. Volume of residuals removed.
[15A NCAC 02T .0708(b), 02T .0808]
8. A maintenance log shall be kept at this facility. This log shall be maintained for five years, and shall
be made available to the Division upon request. This log shall include:
a. Date of flow measurement device calibration;
b. Date of disposal equipment calibration;
c. Visual observations of the plant and plant site; and
d. Record of preventative maintenance (e.g., changing of equipment, adjustments, testing, inspections
and cleanings, etc.).
[15A NCAC 02T .0707(h), 02T .0807]
9. Monitoring wells MW-1, MW-3, and MW-4 shall be sampled after construction, and within three
months prior to initiating wastewater disposal operations. Monitoring wells MW-1, MW-3, and MW-
4 shall be sampled thereafter at the frequencies and for the parameters specified in Attachment C. All
mapping, well construction forms, well abandonment forms, and monitoring data shall refer to the
permit number and the well nomenclature as provided in Attachment C and Figure 1. [ 15A NCAC 02T
.0105(m)]
10. For initial sampling of monitoring wells MW-1, MW-3, and MW-4, the Permittee shall submit a
Compliance Monitoring Form (GW-59) and a Well Construction Record Form (GW-1) listing this
permit number and the appropriate monitoring well identification number. Initial Compliance
Monitoring Forms (GW-59) without copies of the Well Construction Record Forms (GW-1) are
deemed incomplete, and maybe returned to the Permittee without being processed. [15A NCAC 02T
.0105(m)]
11. Two copies of the monitoring well sampling and analysis results shall be submitted on a Compliance
Monitoring Form (GW-59), along with attached copies of laboratory analyses, on or before the last
working day of the month following the sampling month. The Compliance Monitoring Form (GW-59)
shall include this permit number, the appropriate well identification number, and one GW-59a
certification form shall be submitted with each set of sampling results. All information shall be
submitted to the following address:
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[15A NCAC 02T .0105(m)]
WQ0040672 Version 1.0 Shell Version 181205 Page 7 of 11

12. Noncompliance Notification:
The Permittee shall report to the Washington Regional Office, telephone number [phone],
within 24 hours of first knowledge of the following:
a. Treatment of wastes abnormal in quantity or characteristic, including the known passage of a
hazardous substance.
b. Any process unit failure (e.g., mechanical, electrical, etc.) rendering the facility incapable of
adequate wastewater treatment.
c. Any facility failure resulting in a discharge to surface waters.
d. Any time self -monitoring indicates the facility has gone out of compliance with its permit
limitations.
e. Ponding in or runoff from the disposal sites.
f. Effluent breakout from the disposal sites.
Emergencies requiring reporting outside normal business hours shall call the Division's Emergency
Response personnel at telephone number [phone], [phone], or [phone]. All
noncompliance notifications shall file a written report to the Washington Regional Office within five
days of first knowledge of the occurrence, and this report shall outline the actions proposed or taken to
ensure the problem does not recur. [15A NCAC 02T .0108(b)(1)(A)]
V. INSPECTIONS
1. The Permittee shall perform inspections and maintenance to ensure proper operation of the wastewater
treatment and disposal facilities. [15A NCAC 02T .0707(i), 02T .0807]
2. The Permittee shall inspect the wastewater treatment and disposal facilities to prevent malfunctions,
facility deterioration, and operator errors that may result in discharges of wastes to the environment,
threats to human health, or public nuisances. The Permittee shall maintain an inspection log that
includes the date and time of inspection, observations made, and maintenance, repairs, or corrective
actions taken. The Permittee shall maintain this inspection log for a period of five years from the date
of the inspection, and this log shall be made available to the Division upon request. [15A NCAC 02T
.0707(h), 02T .0707(i), 02T .0807]
Division authorized representatives may, upon presentation of credentials, enter and inspect any
property, premises, or place related to the wastewater treatment and disposal facilities permitted herein
at any reasonable time for determining compliance with this permit. Division authorized
representatives may inspect or copy records maintained under the terms and conditions of this permit,
and may collect groundwater, surface water, or leachate samples. [G.S. 143-215.3(a)(2)]
WQ0040672 Version 1.0 Shell Version 181205 Page 8 of 11

VI. GENERAL CONDITIONS
1. Failure to comply with the conditions and limitations contained herein may subject the Permittee to a
Division enforcement action. [G.S. 143-215.6A, 143-215.6B, 143-215.6C]
2. This permit is effective only with respect to the nature and volume of wastes described in the permit
application, and Division -approved plans and specifications. [G.S. 143-215.1(d)]
3. Unless specifically requested and approved in this permit, there are no variances to administrative codes
or general statutes governing the construction or operation of the facilities permitted herein. [15A
NCAC 02T .0105(n)]
4. The issuance of this permit does not exempt the Permittee from complying with all statutes, rules,
regulations, or ordinances that other jurisdictional government agencies (e.g., local, state, and federal)
may require. [ 15A NCAC 02T .0105(c)(6)]
5. If the permitted facilities change ownership, or the Permittee changes their name, the Permittee shall
submit a permit modification request on Division -approved forms. The Permittee shall comply with
all terms and conditions of this permit until the permit is transferred to the successor -owner. [G.S. 143-
215.1(0)]
6. The Permittee shall retain a set of Division -approved plans and specifications for the life of the facilities
permitted herein. [15A NCAC 02T .0105(o)]
7. The Permittee shall maintain this permit until the proper closure of all facilities permitted herein, or
until the facilities permitted herein are permitted by another authority. [15A NCAC 02T .01050)]
8. This permit is subject to revocation or modification upon 60-day notice from the Division Director, in
whole or part for:
a. violation of any terms or conditions of this permit or Administrative Code Title 15A Subchapter
02T;
b. obtaining a permit by misrepresentation or failure to disclose all relevant facts;
c. the Permittee's refusal to allow authorized Department employees upon presentation of credentials:
i. to enter the Permittee's premises where a system is located or where any records are required
to be kept;
ii. to have access to any permit required documents and records;
iii. to inspect any monitoring equipment or method as required in this permit; or
iv. to sample any pollutants;
d. the Permittee's failure to pay the annual fee for administering and compliance monitoring; or
e. a Division determination that the conditions of this permit are in conflict with North Carolina
Administrative Code or General Statutes.
[15A NCAC 02T .0110]
WQ0040672 Version 1.0 Shell Version 181205 Page 9 of 11

9. Unless the Division Director grants a variance, expansion of the facilities permitted herein shall not
occur if any of the following apply:
a. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has been convicted of
environmental crimes under G.S. 143-215.6B, or under Federal law that would otherwise be
prosecuted under G.S. 143-215.6B, and all appeals of this conviction have been abandoned or
exhausted.
b. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has previously abandoned
a wastewater treatment facility without properly closing the facility.
c. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has not paid a civil
penalty, and all appeals of this penalty have been abandoned or exhausted.
d. The Permittee or any parent, subsidiary, or other affiliate of the Permittee is currently not compliant
with any compliance schedule in a permit, settlement agreement, or order.
e. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has not paid an annual
fee.
[15A NCAC 02T .0120(b), 02T .0120(d)]
10. This permit shall not be renewed if the Permittee or any affiliation has not paid the required annual fee.
[15A NCAC 02T .0120(c)]
Permit issued this the 4' day of September 2019
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
nda Culpepper, Director .
Division of Water Resources 0
By Authority of the Environmental Management Commission
Permit Number WQ0040672
WQ0040672 Version 1.0 Shell Version 181205 Page 10 of 11

Permit No. WQ0040672
Stevens Towing Co. of North Carolina, LLC
Stevens Towing — Riverbulk Terminal WWTF
❑ Partial ❑ Final
Other Non -Discharge Wastewater System
September 4, 2019
Chowan County
ENGINEERING CERTIFICATION
I, , as a duly licensed North Carolina Professional
Engineer, having ❑ periodically / ❑ fully observed the construction of the permitted facilities, do hereby
state to the best of my abilities that the facility was constructed in compliance with G.S. 143-215.1,
Administrative Code Title 15A Subchapter 02T, this permit, and the Division -approved plans and
specifications.
Documentation of any variation to this permit, and the Division -approved plans and specifications, is in the
attached as -built drawings.
Description of variations:
Professional Engineer's Name
Firm Name ! Firm No.
Address
City I State I Zip Code I
Telephone
Email
Seal, Signature, and Date
THE COMPLETED ENGINEERING CERTIFICATION, INCLUDING ALL SUPPORTING
DOCUMENTATION, SHALL BE SENT TO THE FOLLOWING ADDRESS:
NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
NON -DISCHARGE BRANCH
By U.S. Postal Service By Courier/Special Deliver\
1617 MAIL SERVICE CENTER 512 N. SALISBURY ST.
RALEIGH, NORTH CAROLINA 27699-1617 RALEIGH, NORTH CAROLINA 27604
WQ0040672 Version 1.0 Shell Version 181205 Page 11 of 11

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ATTACHMENT A — LIMITATIONS AND MONITORING REQUIREMENTS
Permit Number: WQ0040672 Version: 1.0
PPI 001— WWTF Effluent
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITS
Units of Monthly Monthly Daily Minimum Daily Maximum
Measure Average Geometric Mean
MONITORING REQUIREMENTS
PCs
Code
Parameter Description
Measurement
Frequency
Sample
Type
00310
BOD, 5-Day (20 °C)
mg/L
4 x Year
Grab
00940
Chloride (as Cl)
mg/L
3 x Year z
Grab
31616
Coliform, Fecal MF, M-FC Broth, 44.5 °C
#/100 mL
4 x Year
Grab
50050
Flow, in Conduit or thru Treatment Plant
GPD
12,710
Continuous
Grab
00610
Nitrogen, Ammonia Total (as N)
mg/L
4 x Year
Grab
00625
Nitrogen, Kjeldahl, Total (as N)
mg/L
4 x Year'
Grab
00620
Nitrogen, Nitrate Total (as N)
mg/L
4 x Year
Grab
00600
Nitrogen, Total (as N)
mg/L
4 x Year
Grab
00400
pH
su
Per Event
Grab
00665
Phosphorus, Total (as P)
mg/L
4 x Year'
Grab
70300
Solids, Total Dissolved —180 °C
mg/L
3 x Year'
Grab
00530
Solids, Total Suspended
mg/L
4 x Year'
Grab
1. 4 x Year sampling shall be conducted in March, July, September, and November.
2. 3 x Year sampling shall be conducted in March, July, and November.
WQ0040672 Version 1.0 Attachment A Page 1 of 1

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ATTACHMENT B — APPROVED LAND APPLICATION SITES AND LIIVIITATIONS Permit Number: WQ0040672 Version: 1.0
Stevens Towing Co. of North Carolina, LLC — Stevens Towing — Riverbulk Terminal WWTF
DISPOSAL AREA INFORMATION
APPLICATION LIMITATIONS
Net
Dominant
Site
Owner
County
Latitude
Longitude
Acreage
Soil Series
Parameter
Rate
Units
1
Stevens Towing Co. of North
Chowan
36.205173'
-76.711599'
0.56
Urban
01284 — Non -Discharge Application Rate
0.149
GPD/ftz
Carolina, LLC
Totals
0.56

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ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS
Permit Number: WQ0040672 Version: 1.0
Monitoring Wells: MW-1, MW-3, and MW-4
GROUNDWATER CHARACTERISTICS
GROUNDWATER STANDARDS
MONITORING REQUIREMENTS
PCS Code
Parameter Description
Daily Maximum
Frequency Measurement
Sample Type
Footnotes
01007
Barium, Total (as Ba)
mg/L
3 x Year
Grab
1
00680
Carbon, Tot Organic (TOC)
mg/L
3 x Year
Grab
1,6
00940
Chloride (as Cl)
250
mg/L
3 x Year
Grab
1
01034
Chromium, Total (as Cr)
mg/L
3 x Year
Grab
1
31616
Coliform, Fecal MF, M-FC Broth, 44.5 °C
#/100 mL
3 x Year
Grab
1
01051
Lead, Total (as Pb)
mg/L
3 x Year
Grab
1
01055
Manganese, Total (as Mn)
mg/L
3 x Year
Grab
1
01067
Nickel, Total (as Ni)
mg/L
3 x Year
Grab
1
00610
Nitrogen, Ammonia Total (as N)
1.5
mg/L
3 x Year
Grab
1
00620
Nitrogen, Nitrate Total (as N)
10
mg/L
3 x Year
Grab
1
00400
pH
6.5-8.5
su
3 x Year
Grab
1,2
00665
Phosphorus, Total (as P)
mg/L
3 x Year
Grab
1
70300
Solids, Total Dissolved - 180 °C
500
mg/L
3 x Year
Grab
1
GWVOC
Volatile Compounds (GW)
Present: Yes/No
Annually
Grab
1, 4, 5
82546
Water Level, Distance from measuring point
feet
3 x Year
Calculated
1, 2, 3
1. 3 x Year monitoring shall be conducted in March, July, and November; Annual monitoring shall be conducted in November.
2. The measurement of water levels shall be made prior to purging the wells. The depth to water in each well shall be measured from the surveyed point on the top of the casing. The measurement of
pH shall be made after purging and prior to sampling for the remaining parameters.
3. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the relative elevation of the measuring point for each monitoring well. The measuring points (top of
casing) of all monitoring wells shall be surveyed relative to a common datum.
WQ0040672 Version 1.0 Attachment C Pagel of 2

4. Volatile Organic Compounds (VOC) - In November only, analyze by one of the following methods:
a. Standard Method 6230D, PQL at 0.5 µg/L or less
b. Standard Method 6210D, PQL at 0.5 µg/L or less
c. EPA Method 8021, Low Concentration, PQL at 0.5 µg/L or less
d. EPA Method 8260, Low Concentration, PQL at 0.5 µg/L or less
e. Another method with prior approval by the Water Quality Permitting Section Chief
Any method used shall meet the following qualifications:
a. A laboratory shall be DWR certified to run any method used.
b. The method used shall include all the constituents listed in Table VIII of Standard Method 6230D.
c. The method used shall provide a PQL of 0.5 µg/L or less that shall be supported by laboratory proficiency studies as required by the DWR Laboratory Certification Unit. Any constituents
detected above the MDL but below the PQL of 0.5 µg/L shall be qualified (estimated) and reported.
5. If any volatile organic compounds (VOC) are detected as a result of monitoring as provided in Attachment C, then the Washington Regional Office supervisor, telephone number [phone],
shall be contacted immediately for further instructions regarding any additional follow-up analyses required.
6. If TOC concentrations greater than 10 mg/L are detected in any downgradient monitoring well, additional sampling and analysis shall be conducted to identify the individual constituents comprising
this TOC concentration. If the TOC concentration as measured in the background monitor well exceeds 10 mg/L, this concentration will be taken to represent the naturally occurring TOC
concentration. Any exceedances of this naturally occurring TOC concentration in the downgradient wells shall be subject to the additional sampling and analysis as described above.
7. Monitoring wells shall be reported consistent with the nomenclature and location information provided in Figure 1 and this attachment.
WQ0040672 Version 1.0 Attachment C Page 2 of 2

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