NC0021849_Renewal (Application)_20170706

Water Resources
ENVIRONMENTAL QUALITY
July 10, 2017
Mr. Charles A. Jones, Jr.
Town of Hertford
PO Box 32
Hertford, NC 27944
Subject: Permit Renewal
Application No. NCO021849
Hertford WWTP
Perquimans County
Dear Mr. Jones:
ROY COOPER
Gorernoi
MICHAEL S. REGAN
Acting Secietmi
S. JAY ZIMMERMAN
Du ecta
The Water Quality Permitting Section acknowledges receipt of your permit application and
supporting documentation received on July 06, 2017. The primary reviewer for this renewal
application is Charles Weaver.
The primary reviewer will review your application, and he will contact you if additional
information is required to complete your permit renewal. Per G.S. 150B-3 your current permit
does not expire until permit decision on the application is made. Continuation of the current permit
is contingent on timely and sufficient application for renewal of the current permit.
If you have any additional questions concerning renewal of the subject permit, please
contact Charles at 919-807-6391 or [e-mail].
Sincerely,
Wren Thedford
Wastewater Branch
cc: Central Files
NPDES
Washington Regional Office
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-807-6300

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED
RIVER BASIN:
Town of Hertford WWTP, NCO021849
RENEWAL
PASQUOTANK
11
FORM J1,
7,4wFt m1 1�o .0
A li, I) !Q.'�
2 "N'P ES, F 2A�j 9?N
NPDES
A
APPLICATION OVERVIEW
Form 2A has been developed in a modular format and consists of a "Basic Application Information" packet
and a "Supplemental Application Information" packet. The Basic Application Information packet is divided
into two parts. All applicants must complete Parts A and C. Applicants with a design flow greater than -or
equal to 0.1 mgd must also complete Part B. Some applicants must also complete the Supplemental
Application Information packet. The following items explain which parts of Form 2A you must complete.
BASIC APPIICATION INFORMATION:
A. Basic Application Information for all Applicants. All applicants must complete questions A I through A 8 A treatment works
that discharges effluent to surface waters of the United States must also answer questions A 9 through A 12
B. Additional Application Information for Applicants with a Design Flow � 0.1 mgd. All treatm
than to 0 1
greater or equal million gallons per day must complete questions B I through B RE6�V19bMQfflfiows
IC. Certification. All applicants must complete Part C (Certification) JUL 0 6 2017
SUPPLEMENTAL APPLICATION INFORMATION: Water Quality
Permitting Section
D. Expanded Effluent Testing Data. A treatment works that discharges effluent to surface waters of the United States and meets
one or more of the following criteria must complete Part D (Expanded Effluent Testing Data)
1 Has a design flow rate greater than or equal to 1mgd,
2 Is required to have a pretreatment program (or has one in place), or
3 Is otherwise required by the permitting authority to provide the information
E. Toxicity Testing Data. A treatment works that meets one or more of the following criteria must complete Part E (Toxicity Testing
Data)
I Has a design flow rate greater than or equal to 1 mgd,
2 Is required to have a pretreatment program (or has one in place), or
3 Is otherwise required by the permitting authority to submit results of toxicity testing,
F. Industrial User Discharges and RCRA/CERCLA Wastes. A treatment works that accepts process wastewater from any
significant industrial users (SlUs) or receives RCRA or CERCLA wastes must complete Part F (Industrial User Discharges
and RCRNCERCLA Wastes) SlUs are defined as
I All industrial users subject to Categorical Pretreatment Standards under 40 Code of Federal Regulations (CFR) 403 6 and
Q CFR Chapter 1, Subchapter N (see instructions), and
2 Any other industrial user that
a Discharges an average of 25,000 gallons per day or more of process wastewater to the treatment works (with certain
exclusions), or
b Contributes a process wastestrearn that makes up 5 percent or more of the average dry weather hydraulic or organic
capacity of the treatment plant, or
G. Is designated as an SIU by the control authority
G. Combined Sewer Systems. A treatment works that has a combined sewer system must complete Part G (Combined Sewer
Systems)
gig,V- tff- S -E 0- f- W
,
R IFICA-T N,
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64,112
EPA Form 3510-2A (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 1 of 22

FACILITY NAME AND PERMIT NUMBER.
PERMIT ACTION REQUESTED.
RIVER BASIN
Town of Hertford WV\rTP, NCO021849
Renewal
Pasquotank
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All treatment works must complete questions A.1 through A.8 of this Basic Application Information Packet,
A I Facility Information.
Facility Name Town of Hertford WVVTP
Mailing Address PO Box 32
Hertford NC 27944
Contact Person Charles Jones
Title Chief Operator
Telephone Number (262) 333-694
Facility Address 142 Mead's Circle
(not P 0 Box) Hertford NC 27944
A 2. Applicant Information. If the applicant is different from the above, provide the following
Applicant Name Town of Hertford
Mailing Address PO Box 32
Hertford NC 27944
Contact Person Brandon Shoaf
Title Town Manager
Telephone Number [phone]
Is the applicant the owner or operator (or both) of the treatment works?
Z owner El operator
Indicate whether correspondence regarding this permit should be directed to the facility or the applicant
E facility El applicant
A.3. Existing Environmental Permits. Provide the permit number of any existing environmental permits that have been issued to the treatment works
(include state -issued permits)
NPDES NCO021849 PSD
UIC Other WQ0021289
RCRA Other W00020239
A.4. Collection System Information. Provide information on municipalities and areas served by the facility Provide the name and population of each
entity and, if known, provide information on the type of collection system (combined vs separate) and its ownership (municipal, private, etc)
Name Population Served Type of Collection System Ownership
Town of Hertford 2150 Separate Municipal
Town of Winfall 600 Separate Municipal
Total population served 2750
EPA Form 3510-2A (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 2 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED. RIVER BASIN -
Town of Hertford WWTP, NCO021849 Renewal Pasquotank
A.5 Indian Country
a Is the treatment works located 1n Indian Country?
Yes No
b Does the treatment works discharge to a receiving water that is either in Indian Country or that is upstream from (and eventually flows
through) Indian Country?
Yes No
A.6. Flow. Indicate the design flow rate of the treatment plant (I e , the wastewater flow rate that the plant was built to handle) Also provide the
average dally flow rate and maximum dally flow rate for each of the last three years Each year's data must be based on a 12 -month time period
with the 12'^ month of "this year" occun mg no more than Siree months prior to this application submittal
a Design flow rate 0.700 mgd
Two Years Ago Last Year This Year
b Annual average daily flow rate 0 623 0.666 0.518
c Maximum daily flow rate 1 116 2.132 0.857
A.7 Collection System. Indicate the type(s) of collection system(s) used by the treatment plant Checl� all that apply Also estimate the percent
contribution (by miles) of each
Separate sanitary sewer 100% %
Combined storm and sanitary sewer
A.8. Discharges and Other Disposal Methods.
a Does the treatment works discharge effluent to waters of the U,S ? -, Yes , No
If yes, list how many of each of the following types of discharge points the treatment works uses
I Discharges of treated effluent
Ii Discharges of untreated or partially treated effluent
III Combined sewer overflow points
IV Constructed emergency overflows (prior to the headworks)
V Other
b Does the treatment works discharge effluent to baEins, ponds, or other surface impoundments
that do not have outlets for discharge to waters of the U S ? F I Yes
If yes, provide the following for each surface impoundment
Location
Annual average daily volume discharge to surface,impoundment(s)
Is discharge 1 continuous or i__' intermittent?
c Does the treatment works land -apply treated wastewater?
If yes, provide the following for each land application site
Location Coiner of Grubb Street and Mend's Circle. Hertford NC
Number of acres Approximately 100 wetted
0
— No
mgd
1 Yes I -I No
Annual average daily volume applied to site 0.240 mgd
Is land application continuous or intermittent?
d Does the treatment works discharge or transport traated or untreated wastewater to another
treatment works? Yes
No
EPA Form 3510-2A (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 3 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED.
RIVER BASIN
Town of Hertford WWTP, NCO021849
Renewal
PASQUOTANK
If yes, describe the mean(s) by which the wastewater fiom the treatment works is discharged or transported to the other treatment works
(e,g , tank truck, pipe)
If transport is by a party other than the applicant, provide
Transporter Name
Mailing Address
Contact Person
Title
Telephone Number ( )
For each treatment works that receives this discharge, provide the following
Name
Mailing Address
Contact Person
Title
Telephone Number I )
If known, provide the NPDES permit number of the treatment works that receives this discharge
Provide the average daily flow rate from the treatment works into the receiving facility
mgd
e Does the treatment works discharge or dispose of its wastewater in a manner not included
in A 8 through A 8 d above (e g , underground percolation, well injection) L Yes
-L] No
If yes, provide the following for each disposal method
Description of method (including location and size of site(s) if applicable)
Annual daily volume disposed by this method
_
Is disposal through this method =1 continuous or intermittent?
EPA Form 3510-2A (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 4 of 22

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED, RIVER BASIN.
Town of Hertford WWTP, NCO021849 Renewal PASQUOTANK
WASTEWATER DISCHARGES:
If you answered "Yes" to question A.8 a, complete questions A 9 through A.12 once for each outfall (including bypass points) through
which effluent is discharged. Do not include information on combined sewer overflows in this section If you answered "No" to question
A 8.a, go to Part B, "Additional Application Information for Applicants with a Design Flow Greater than or Equal to 0.1 mgd."
A.9. Description of Outfall
a Optfall number
b Location
(City or town, if applicable) (Zip Code)
Perouimans NC
(County) (State)
(Latitude)
c Distance from shore (if applicable)
d Depth below surface (if applicable)
e Average daily flow rate
f Does this outfall have either an intermittent or a periodic discharge?
If yes, provide the following information
Number f times per year discharge occurs
Average duration of each discharge
Average flow per discharge
Months in which discharge occurs
g Is outfall equipped with a diffuser?
(Longitude)
ft
ft
0,500 mgd
L; Yes No (go to A 9 g)
L a Yes ,-i No
mgd
A.10 Description of Receiving Waters.
a Name of receiving water Perguimans River
b Name of watershed (if known) N/A
United States Sod Conservation Service 14 -digit watershed code (if known)
c Name of State Management/River Basin (if known)
United States Geological Survey 8 -digit hydrologic cataloging unit code (if known)
d Critical low flow of receiving stream (if applicable)
acute cfs chronic cf�
e Total hardness of receiving stream at critical low flow (if applicable) mg/I of CaCO3
EPA Foran 3510-2/1 (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 6 of 22

FACILITY NAME AND PERMIT NUMBER
PERMIT ACTION REQUESTED
RIVER BASII4
Town of Hertfoid WWTP NCO021849
Renewal
PASQUOTANK
All Description of Treatment
a What level of treatment are provided? Check all that apply
Primary Secondary
Advanced Other Describe
b Indicate the following removal rales (as applicable)
Design BOD5 removal or Design CBOD5 removal 95
Design SS removal 95 %
Design P removal NIA oda
Design N removal N/A %
Other %
C What type of disinfection is used for the effluent from this outfall? If disinfection varies by season, please describe
Liquid Chlorine
If disinfection is by chlorination is dechlonnation used for this outfall? Yes No
Does the treatment plant have post aeration? Yes No
A 12 Effluent Testing Information, All Applicants that discharge to waters of the US must provide effluent testing data for the following
parameters Provide the indicated effluent testing required by the permitting authority for each outfall through which effluent is
discharc)ed. Do not include information on combined sewer overflows In this section. All information reported must be based on data
collecteo through analysis conducted using 40 CFR Part 136 methods. In addition, this data must comply with QA/QC requirements of
40 CFR Part 136 and other appropriate QAIQC requirements for standard methods for analytes not addressed by 40 CFR Part 136 At a
minimum, effluent testing data must be based on at least three samples and must be no more than four and one-half years apart.
Outfall number 002
MAXIMUM DAILY VALUE
AVERAGE DAILY VALUE
PARAMETER
Value
Units
Value
Units
Number of Samples
pH (Minimum)
6.43
s u
pH (Maximum)
7.13
s u
Flow Rate
0.857
MGD
0.518
MGD
365
Temperature (Winter)
22.8
Deg C
15.5
Deg C
60
Temperature (Summer)
28.4
Deg C
25.3
Deg C
84
* Foi pH please report a minimum and a maximum daily value
MAXIMUM DAILY
DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
MLlMDL
Conc.
Units
Conc.
Units
Number of
METHODSamples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
BIOCHEMICAL, OXYGEN
BODS
5.4
mcg/L
24
m /L
156
SM5201 B
2.0
DEMAND (Report one)
CBODS
FECAL COLIFQRM
2419
C0I/100
6 1
C011100
156
IDEXX
1
TOTAL SUSPENDED SOLIDS (TSS)
20.4
Ing/L
<2.5
m /L
156
SM2450 F-1997
2.5
END OF PART A.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 6 of 22

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED
RIVER BASIN
Town of Hertford WWTP NCO021849
Renewal
PASQUOTANK
BASIC APPLICATION INFORMATION
PART B. ADDITIONAL APPLICATION INFORMATION FOR APPLICANTS WITH A DESIGN FLOW GREATER THAN OR
EQUAL TO 0.1 MGD (100,000 gallons per day).
All applicants with a design flow rate Z o 1 mgd must answer questions B.1 through B 6 All others go to Part C (Certification)
B 1 Inflow and Infiltration Estimate the average number o/ gallons per day that flow into the treatment works from inflow and/or infiltration
50,000 gpd
Briefly explain any steps underway or planned to minimize inflow and infiltration
Continue to ident fy problems and correct therr when found This includes slip lining, repairing manholes and
laterals
B.2 Topographic Map. Attach to this application a topographic map of the area extending at least one mile beyond facility property boundaries This
map must show the outline of the facility and the following information (You may submit more than one map if one map does not show the entire
area )
a The area surrounding the treatment plant, including all unit processes
b The major pipes or other structures through which wastewater enters the treatment works and the pipes or other structures through which
treated wastewater is discharged from the treatmert plant Include outfalls from bypass piping, if applicable
c Each well where wastewater from the treatment plant is injected underground
d Wells, springs, other surface water bodies, and drinking water wells that are 1) within '% mile of the property boundaries of the treatment
works, and 2) listed in public record or otherwise known to the applicant
e Any areas where the sewage sludge produced by Me treatment works is stored, treated, or disposed
f If the treatment works receives waste that is classified as hazardous under the Resource Conservation and Recovery Act (RCRA) by truck, rail,
or special pipe, show on the map Where the hazardous waste enters the treatment works and where it is treated, stored, and/or disposed
B 3 Process Flow Diagram or Schematic. Provide a diagram showing the processes of the treatment plant, including all bypass piping and all
backup power sources or redunancy in the system Also provide a water balance showing all treatment units, including disinfection (e g ,
chlorination and dechlonnation) The water balance must show daily average flow rates at influent and discharge points and approximate daily flow
rates between treatment units Include a brief narrative description of the diagram
B -d Operation/Maintenance Performed by Contractor(s)
Are any operational or maintenance aspects (related to wastewater treatment and effluent quality) of the treatment works the responsibility of a
contractor? Yes No
If yes, list the name, address, telephone number, and status of each contractor and describe the contractor's responsibilities (attach additional
pages if necessary)
Name
Mailing Address
Telephone Number ( )
Responsibilities of Contractor
B 5 Scheduled improvements and Schedules of Implementation. Provide information on any uncompleted implementation schedule or
uncompleted plans for improvements that will affect the wastewater treatment, effluent quality, or design capacity of the treatment works If the
treatment works has several different implementation schedules or is planning several improvements, submit separate responses to question B 5
for each (If none, go to question B 6 )
a List the outfall number (assigned in question A 9) for each ouffall that is covered by this implementation schedule
b Indicate whether the planned improvements or implementation schedule are required by local, State, or Federal agencies
Yes No
EPA Form 3510-2A (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 7 of 22

FACILITY NAME AND PERMIT NUMBER
PERMIT ACTION REQUESTED
RIVER BASIN
Town of Hertford WWTP, NCO021849
Renewal
PASQUOTANK
C If the answer to B 5 b is "Yes," briefly describe, including new maximum daily inflow rate (if applicable)
d Piovide dates imposed by any compliance schedule or any actual dates of completion for the implementation steps listed below, as
applicable For improvements planned independently of local, State, or Federal agencies, indicate planned or actual completion dates, as
applicable Indicate dates as accurately as possible
Schedule Actual Completion
Implementation Stage MM/DD/YYYY MM/DD/YYYY
Begin Construction
End Construction
Begin Discharge
Attain Operational Level
e Have appropriate permits/clearances concerning other Federal/State requirements been obtained? Yes No
Describe briefly
B 6. EFFLUENT TESTING DATA (GREATER THAN 0 1 MGD ONLY).
Applicants that discharge to waters of the US must provide effluent testing data for the following parameters. Provide the indicated
effluent testing required by the permitting authority for each outfall through which effluent is discharged Do not include information
on combine sewer overflows in this section. All information reported must be based on data collected through analysis conducted
using 40 CFR Part 136 methods In addition, this data must comply with QA/QC requirements of 40 CFR Part 136 and other appropriate
"QC requirements for standard methods for analytes not addressed by 40 CFR Part 136 At a minimum effluent testing data must be
based on at least three pollutant scans and must be no more than four and on -half years old.
Outfall Number 002
MAXIMUM DAILY
DISCHARGE
AVERAGE DAILY DISCHARGE
POLLUTANT
ANALYTICAL
ML/MDL
Conc.
Units
Conc
Units
Number of
METHOD
Samples
CONVENTIONAL AND NON CONVENTIONAL COMPOUNDS
AMMONIA (as N)
262
mg/L
009
mg/L
166
EPA 360 1
0.04
CHLORINE (TOTAL
RESIDUAL, TRC)
44
ug/L
16
ug/L
166
SM 4500 CI G-2000
25
DISSOLVED OXYGEN
1026
mg/L
794
mg/L
166
HACH 10360
20
TOTAL KJELDAHL
NITROGEN (TKN)
1.66
mg/L
1.11
mglL
4
EPA 361.2
NITRATE PLUS NITRITE
NITROGEN
16.76
mg/L
12.91
mg/L
4
EPA 353.2
OIL and GREASE
PHOSPHORUS (Total)
1 26
mg/L
099
mg/L
4
EPA 366 4
TOTAL DISSOLVED SOLIDS
(TDS)
OTHER Mercury
37
ng/L
3.7
ng/L
1
1631
1
END OF PART E.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 8 of 22

FACILITY NAME AND PERMIT NUMBER
PERMIT ACTION REQUESTED
RIVER BASIN
Town of Hertford WWTP, NCO021849
RENEWAL
Pasquotank
BASIC APPLICATION INFORMATION
PART C. CERTIFICATION
All applicants must complete the Certification Section. Refer to instructions to determine who is an officer for the purposes of this
certification. All applicants must complete all applicable sections of Form 2A, as explained in the Application Overview. Indicate below whuch
parts of Form 2A you have completed and are submitting. By signing this certification statement, applicants confirm that they have reviewed
Form 2A and have completed all sections that apply to the facility for which this application is submitted
Indicate which parts of Form 2A you have completed and are submitting -
Basic Application Information packet Supplemental Application Information packet
Part D (Expanded Effluent Testing Data)
Part E (Toxicity Testing Biomonitonng Data)
Part F (Industrial User Discharges and RCRA/CERCLA wastes)
Part G (Combined Sewer Systems)
ALL APPLICANTS MUST COMPLETE THE FOLLOWING CERTIFICATION.
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who
manage the system or those persons directly responsible for gathering the information, the information is, to the best of my knowledge and belief, true,
accurate, and complete I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment
for knowing violations
Name and official title Brandon S f o n na er
Signature
Telephone number (252) 426// 1969
Date signed b ' z -i • 2 1'1
Upon request of the permitting authority, you must submit any other information necessary to assure wastewater treatment practices at the treatment
works or identify appropriate permitting requirements
NC®ENR/ DWQ
Attn: NP®ES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
EPA Form 3510-2A (Rev 1-99) Replaces EPA forms 7550-6 & 7550-22 Page 9 of 22

Town of Hertford W\NTP NCO021849
83 Process description Sheet 2
The treatment facility is a 0.700 MGD rated activated sludge process with tertiary treatment. The
facility has been in operation since 2008. This facility replaced a 0.300 MGD secondary treatment facility.
Preliminary Treatment (Numbers 1-4)
The wastewater enters the facility via two force mains (one for the Town of Hertford and one
for the Town of Winfall). It first passes through mechanical screens with trash washer. It then
passes through a parshall flume with flow measurement. It next passes through grit removal
consisting of continuously rotating paddle, grit pump and cyclone water separator with
conveyor. The trash and grit are removed from the site for landfill disposal. It then enters the
influent pump station, consisting of three pumps, that sends it to the oxidation ditches.
Secondary Treatment (Numbers 5-7)
The secondary system consists of three mechanically aerated oxidation ditches, splitter box and
two secondary clarifiers.
Tertiary Treatment/Disinfection/Effluent Disposal (Numbers 8-12)
The tertiary treatment, after clarification, consists of two parallel disk filters, chlorine injectors
and contact tanks. The disk filters are rated for 10 MGD each, and each contact tank will
provide 30 minutes of contact time at that rate. After disinfection, there is the effluent pump
station, consisting of three pumps, that sends the treated water either to the Perquimans River,
or to the spray field storage tank. After the pump station is sulfur dioxide injection, for de-
chlorination. The choice of discharge is based on several conditions. Spray field operation is
handled under permit WQQ021289.
Sludge Handling (Numbers 13-19)
The Settled solids from the clarifiers either returns to the influent pump station as Return
Activated Sludge (RAS) or to the aerobic digester as Waste Activated Sludge (WAS). The choice
is made at the RAS/WAS splitter box. Waste sludge is sent to the aerobic digester, where it is
held for at least 30 days under aeration, supernatant is withdrawn and returned to the plant,
and then sent to the sludge storage tank to be held until final disposition The sludge can either
be sent to the drying beds to be dewatered and disposed of, or sent to the truck loading station
and be hauled to approved fields to be disposed of as a liquid. Sludge operations are handled
under permit WQ0020239.

Town of Hertford WWTP, NC0021849
B3 Process diagram key Sheet 1
1. Mechanical bar screen with debris washer
2. Parshall flume with flow measurement
3. Grit removal system with pump, water separator and conveyor belt
4. Influent well with three pumps
5. Oxidation ditches with mechanical rotating mixers (3)
6. Mixed liquor splitter box
7. Secondary clarifiers (2)
8. Tertiary filters
9. Chlorine injection and contact tank
10. Sulfur dioxide injection
11. Effluent pumps and flow metering
12. Spray irrigation system
13. RAS/WAS splitter box
14. RAS line to secondary treatment
15. WAS line to digester
16. Aerobic digester
17. Sludge storage tank
18. Sludge drying beds
19. Sludge truck loading station

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NOTE: THE OWNER IS RESPONSIBLE FOR THE CONTINUOUS OPERATION OF THE
WASTEWATER TREATMENT PLANT. IN NO SITUATION SHALL THE CONTRACTOR
OPERATE THE PLANT, OR A PORTION OF THE PLANT- THE DIVISION OF WATER
QUALITY WASHINGTON SHALL BE CONTACTEDRAaLEA T 48 HOURONAL OFFICE. S�PRIORETOUTHE STARTUP OR 6481,
SHUTDOWN OF ANY PROCESS UNIT OR SEWER COLLECTION PUMP STATION.
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PUMP CONTROL PANEL
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PROPOSED MH No 2
® 26 27 SEE S 1 16 11 J 1
SEE SHEET C4 FOR CONTINUATION
WASTEWATER TREATMENT IMPROVEMENTS
TOWN OF HERTFORD
MATERIAL I FROM
STATION -�.
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REMARKS --�
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Qly METER
_
TREATED EFFLUENT
...
7 USER
TREATED EFFLUENT - RIVER DISCHARGE
_ .. _
IO DING TANK
TREATED
_
NOT USED
_
gER TAROK_-
RETURN —ACTIVATED SLUDGE-
_.-
RETURN A VA UDGE
_
IR STATION
N ACTIVA UDGEESTER
- -fIRPTUR,
GE
—
-TO N 1 ABAND 'N R
- TO OEIC DIGESTER
1 �N �TATKINCLARIFIER#Z
SCUM UNE -TO U TAR -
_I
1NG BEDS
WAS SLUDGE
WASTE SLUDGE BED - TO UNE 2.Z ABANDON R MAND
DING TANK_--
WASTE SLUDGE
AH #I
DIGESTER DECANT _
_.-----..-_
NOT USED
_..L
BACKWASH --_.
IDLING STATION _-_
4H #2 -- --
WASTE SLUDGE _ ----
SANITARY SEWER SERVICE - T1E I EX SERVICE _
_ --
ANT___
POTABLE WATER SUPPLY
OE -14 ._-
-AERATION BASIN DRAIN
H ING TANK OVERFLOW--
MH #3-_
-, UDGE
------- '
_SEE SITE PLAN
JG WATER SERNCE-
-_ NOT USED ---- -- -._-
MIXED UOUOR - TO BE CDNNECTED TD F111LIR C IFIF
EXIST POTAEttE WATER SERVICE - ADD RPZ V AND METER
ANT
�..
POTABLE WATER SUPPLY.----_ -- --- -
_-- ------
-SEE SITE PLAN
RAS - TO BE CONNECTED TO FUTURE CLARIFIER -
ANT .HEAD S A WA P SO HEAD S -
'.ANT
_ POTABLE WATER SUPPLY
_--- _
'ANT
MTA[iLE WAITER SUPPLY --_---_---- _- ._..
ANL rt CONTROL
MH P4
--
�H___
03
FILTER BACKWASH
DGE RETURN
MMH H
G RETU ��=--_ -----
AIDING STATION
9 UDGE RENRN _ -
MH L.- -----'
5 WEIWELL-'
SLUDGE
CONTACT MP WA
------�
MM PIT DRAIN
_
)CLING TANK ____
BLOWER LOCATED AT aX_F.dWING TM
MANHOLE 0PUTAP
PUMP TA110N - --
STATION DRAIN _-.- --- ____-._.
REUSE COMPLIANT SUPPLY-.
L--- -.
. J,�PRAY IRRIG _0 WA
RETAIN
TANK _
_ PROTECT AND
$EER STATION _.--
MH A6 _ _
CHLORINE FEED -
DISK FILTER PIT DRAN.IM,_..--_.-
MH --
�' UDGE RENRN _.__-- --_.._._--'--
..----'
FILTERS
rn,1RIFlER EFTLU
---' --
FILTERS-_
IFlER EFFLUENT _ _
-_ --
ON -POT LE WATER__.— —_---.__.--
TA _ _-_
_ OR NATION
�- _ _-
ORINATION
_ -
FILTER
•ORINATION _
__
-CHLORINATION
BU-1DI�1GG
_
POTABLE WATER SUPPLY
TER POND DISCHARGE
VALVE PIT DRAIN-.-_---
__4
SYMBOL. LEGEND
EXISTING PROPOSED/NEW
GUY POST AND WIRE
-
- -- - -'
FIRE HYDRANT
f
WATER METER
0
�
POWER POLE
0
N
VALVE
~
YARD HYDRANT
IRON PIPE
SEWER MANHOLE
CHAIN-UNK FENCE
---
STRUCTURE
- --
ROADWAY
SIDEWALK)
PROCESS PIPE
----
DRAIN PIPE
------ '
-
SLUDGE PIPE
-----
CHEMICAL PIPE
--
POTABLE WATER PIPE
- - -
OVERHEAD ELECTRIC
-
'----
PROPERTY UNE
------�
NOTES
SEE ALL •C" SHEETS FOR UNDERGROUND UTIUTY
& WASTEWATER PLANT OPERATION NOTES
DALE BY
DATE P EIPIUARY 2007
TER 0 10 05 HB
RaeCT Iw:05-027
SCALEjP_L0TDATE____:::�
526
2/01/OB HB
_Z AS BROW
0NEL
cePTER
2 1 07 HB
- 5/07/07 HB
I. N. C3 of 10
MAa
RACK
__4

cJNEET- 3
nl \ /J TTS tJ C on Z � 8 � � �C h1 E V\/
� A L
1 V Y -L 1-1 v r 1-1 C�. . v .-"rte v - " -
0
O . -1 ov rA
nvrr. o•c, 30 2
3 9
1 �
BAR IT
SCREEN REMOVAL
IN F-LUENT
(1.0 MGD)
sUPONATE
RETURN
AEROBIC
DIGESTER
0
SLUDGE
DRYING
BEDS
16
m
F IL-L�s
LoAp or -I GLAR! 1=LE
Ft_ i r 1_' 0'-t )C 8 0%
p•9 MGn
>7 ESL(a�
DISTRIBUTION
\ BOX
5 AERATION
BASIN
IS
141
SLUDGE
HOLDING
BASIN
I7
_UN32 I rM- I IVIN .OGSdvGlvvl_.
i. I TALL EROSION CONTROL MEASURES AS SHOWN ON THE DRAWINGS. NOTIFY NCOENR L/QALN30 AYS PRIOR TO LAND DISTURBING ACTIVITIES.FINAL NOS R IS RESPONSIBLE FOR THE CONTINUOUS OPERATION OF 2, RELOC AND INSTALL NEW SITE FENCING AS SHOWN TO PROVIDE SECUR17Y DURING CDN
CLCATION WASTEWAT NT PLANT. IN NO SITUATION- CONTRACTOR 3. BEGIN RO GRADING AT NEW STRUCTURES.
OPERATE THE PLANT, N T. THE DIVISION OF WATER
OPER TY WASHINGTON FI NE NUMBER [phone], 4. BEGIN CONS CTION ON THOSE STRUCTURES THAT DO NOT IMPACT THE CURRENT OPF�ATIDN OF THE
SHALL OF ANY PD AT ROGESSAUNIT OR SEWER COLLECTION PUMRTUP OR FACILITY, THOS DISINFECTION ANDD�RSKTFILTERS.RES CEFFLUENT APUMP STATION, DISTRIBUTION BOX, DWORKS. AERATION BASIN, IEER08IC DIGESTER,
CHEMICAL FEED FA ITIES, EFFLUENT FORCE MAIN AND DIFFUSER AND ALL SPR -IRRIGATION
�W-1 I�GI� EQUIPMENT INCLUDING UMP STATION AND STORAGE TANK.
5. ALL YARD PIPING MAY B INSTALLED WITH 114E EXCEPTION OF THE CONNEC N O INGSE TREATMENT
l s UNITS AND PIPES THAT A IN SERVICE. PIPING IN THE AREA OF NEWS GE LOADING STATION CAN
k, P LI' �T NOT BE INSTALLED UNTIL TH DEMOLITION OF THE EXISTING HEADWORK S COMPLETED.
6. UPON COMPLETION OF THE NEEATMENT UNITS AND ACCEPTAN BY THE ENGINEER, THE UNITS
TERTIARY DISC EFFLUENT PUMP DIBCHAROE MAY BE PUT IN SERVICE IN THE N4CL,OWING ORDER:
ALTERS STATION (1.0 MCC) a) TIE-IN PIPES REQUIRED TO DIVERT F$OW INTO NEW HEAOWOR S FACILITY. PLUG AND ABANDON
EXISTING LINES LEFT IN PLACE DEMOLI&H THE EXISTING - DWORKS STRUCTURE AND COMPLETE
GlZ So _ ( �, . YARD PIPING AND SLUDGE LOADING STAR N,
2 b) REPLACE CHLORINE DISINFECTION SYSTEM E FLO S DIVERTED TO NEW ULTRAVIOLET DISINFECTION.
2 E l L S 1� V Z4 �1 OOO 6 F D �� �^ COORDINATE WITH PLANT PERSONNEL ON DO 11 OF THE CHEMICAL FEED SYSTEM.
HAVE PLANT PERSONNEL DIVERT FLOW TO NEW ATION BASIN AND CLARIFlEHALI MODIFYR, PLANT AS
KLUDGE \
RETURN 7
13 FINAL
CLARFiCATiON
SCHEMATIC OF WASTEWATER FLOW
HERTFORD WWTP
1 o r -AS
I S COSERVICE,
Cl CONTRAC-
"R VICE
RANDOHAVEO LANT P LUN
NNEL RETURN TO SERVICE WHEN READY.
325,000 G'(-
STORAGE
�f
INSTALL NEW PIP NTG ASCSHOWN
d) REMOVE EXISTING AERATION BASIN FR SERVICE. CONT CTOR WILL TRANSFER (PUMP) CONTENTS
AERATION BASIN TO DIS IBUTION BOX. ANY AINING SOLIDS TO BE REMOVED AND
GROUND
TANK
/�1 -L�
OF EXISTING
SPOSED OF IN EXISTING SLUDGE , YING BED. CONTRACTOR 0 POWER WASH WALLS AND FLOOR
IOR TO INSTALLATION OF AER ON SYSTEM.
DISTRIBUTION BOX, E TING AEROBIC DIGESTER. AND
MOLISH EXISTING STRUCTUR INCLUDING
ISTING CHLORINE CONTAC CHAMBER..
TOP WALL
FINAL GRADING AND I TALLATION OF SIDEWALKS AND DRIVES SHOO BE COMPLETED AT THIS TIME.
8"m FM FROM
SITE SHOULD BE EDED AND MULCHED IN ACCORDANCE WITH THE SPE CATIONS.TIME
WINFALL20
- -
SHAL HE CONTRACTOR ASSUME CONTROL OF THE TREATMENT PROCESS 0 Y -PASS STRUCTURES.
BYPASS SHALL BE PERFORMED BY THE PLANT'PERS NEL AT THET
/GONTRACTOR.
_-
W DIVE ONS OR STRUCTURE
OF E CONTRACTOR. ANY TEMPORARY BYPASS PUMPING SHALL BE PROVIDED BY CONTRACTOR.Y
DISINFECTION SHALL BE MAINTAINED AT ALL TIMES. ANY CHANGES THE ABOVESE
BAR / PARSHALL
GRIT
TR TMENT AND
C ST
BY THE EER 48R. NHWR5 PRIORY REQUIRED STO7DOWN 6EGNNONGT'ORK.HE FAHE CIUTIES UST BE781)
12"0 FM FROM
SCREEI-45 ' FLUME
CHAMBER WETWELL�
TED WITHETHEP OWNDAND THE ENGIN
HERTFORD
ANDONED EQUIPMENT SHALL REMAIN THE PROPERTY OF THE TOWN. -
ACRE
14"m DIP
I RT
L 1400
SPRAY FADS
WN SHALL BE RESPONSIBLE FOR DISPOSAL OF ALL SLUDGE.
I ,
100 -YEAR FLOOD ELEVATION 6.00"
30
L30
1.25
TOP WALL
8"m FM FROM
EL 17.00
WINFALL20
- -
_-
BAR / PARSHALL
GRIT
12"0 FM FROM
SCREEI-45 ' FLUME
CHAMBER WETWELL�
HERTFORD
15
i
14"m DIP
I RT
L 1400
FILTER CHAMBER
AERATION BASIN VJ DISTRIBUTION BOX MAX FLOW EL 12.80 1�e
MAX FLOW EL 20. D0 MAX FLOW EL 17.20 AVG FLOW EL 12.62
AVG FLOW EL 19.50 AVG FLOW EL 16.99 F.
25.1
--
- T R FILTER EFFLUENT
T P INT WA EL 16.75 DISTRIBUTION BOX CLARIFlER MAX FLOW EL 10.45
EL 20.50 NAX FLOW EL 14.32 MAX FLOW EL 13.9363
AVG FLOW EL 10.16 20 _!
70P WALL AVG FLOW EL 14.02 AVG FLOW EL 13.89
_._
_T1 EL 21- OD
10
FLUME IN BOTTOM
EL 14.00 EEL
FLUME OUT BOT S AB IN T
EL 12.83
EL 13.75 12_5D 18'10 DIP
5 HOT SLAB Nn
EL 11.424� D8
GRIT PROPOSED AERATION BASIN
EL 6.42 INFLUENT (SHEETS M5 THRU M11)
.PUMPS- . -
I - WET WELL INV
EL -1.00
INFLUENT FEADWORKS
(SHEETS M1 THRU M4)
,,4rrurnrgh��/ ,.
lot
4495 = GREEN ENGINEERING
WATER. WASTEWATER, SLWEYING' PL.AmNa PROJECT MANAGEMENT
303 N. GOL.DSBORO ST. P.O. BOX 606 NALWN, N.C. 77893
TOP WALL TOP WEIR 9 I Q
EL 18 50 $ EL 14.D4 TOP WALL 15
EL 14.50
TOP WALL �. _ _
EL 15.50 _
EFFLUENT HP EFFLUENT LP
INV EL 13.17
12 0 FM 10
INV El 13.00 4 INVERT
12 0 DIPEL 9.92'
_ -16"P DIP
INVERT 15"0 DIP TREATED , ` 12,
INVERT EFFLUENT 1
T'TOM EL 9.38' _ TO RIVER OR, 5.
INVERTSPRAY FIELD
EL 10.00 80TTDM_ .. _ - - - _ - - -
10.58
EL 7.33' BOTTOM
PROPOS® TOP FOOTING '
DISTRIBUTION BOX L .I
0
(SHEET M12)
DRAIN OUTLET DISK FILTER &
1.11 -1 FN
PROPOSED 38' LD. CLARIFIER
(SHEETS M13 THRU M15)
HORIZONTAL SCALE: NONE
VERTICAL SCALE: 1" = 5'
WASTEWATER TREATMEW iMvhuv=m=IN I 0
TOWN OF HERTFORD
PROPOSED
EFFLUENT PUMPS
(SHEETS MIB THRU M21)
HYDRAULIC PROFILE
,NLK.L �.9. /
INV. = -I.OD 10/18/05 HB HOM AB SHOWN Fli
X3
PLOT DA
na ex9N(, 8/31/D9 HEEIOKEETwX3 OF 3
N.