WQ0039488_More Information (Received)_20171207

ASTERN
CAROLINA
ENGINEERING, P.C.
December 5, 2017
Ms. Tessa Monday
NC Dept. of Environmental Quality
Division of Water Resources
Water Quality Permitting
Non -Discharge Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Application No. WQ0039488
RE: Additional Information Request
Courthouse Area WWTP
High -Rate Infiltration
Camden County
Dear Ms. Monday:
Per your letter dated November 29, 2017, please accept this additional information for the
Camden Courthouse Area Wastewater Treatment Plant:
1. Two (2) copies of the responses to review comments.
2. Two (2) copies of the response from Mr. Edwin E. Andrews, III, PG, NCLSS,
hydrogeologist and soil scientist.
3. Two (2) copies of updated pages 1, 5, and 14 of the application (Form HRIS 06-16). Page
5 indicates a revised UV system with two banks, per manufacturer's recommendation.
4. Two (2) full-sized copies and two (2) 11" x 17" copies of the revised plan sheets: T001,
C203, C304, C500, C5011 C511, C512, C514, C515. Please note that C304 is new to this
submittal.
5. Two (2) copies of supplemental calculation sheets (Tab 7, Item VI of the Appendix).
6. Two (2) copies of revised pages 40 and 41 from the Operation and Maintenance Manual
(Tab 8 of the Appendix).
7. Two (2) copies of revised technical specifications sections 40 00 00 — Amphidrome
Process System and 43 32 63 —Ultraviolet Sterilizers. Section 40 00 00 was modified to
include the updated UV system per manufacturer's recommendation.
8. One disc containing a digital copy of each of the above items.
Eastern Carolina Engineering, PC,
P. 0. Box 128 Camden, North Carolina 27921
[phone] License C-4162
www.easterncarolinaengineering.com

Ms. Tessa Monday
NCDEQ
December 5, 2017
Page 2
Please note that one copy of each item listed above is being delivered directly to Mr. Randy
Sipe in the Washington Regional Office.
If you have any questions regarding this submittal, please do not hesitate to contact my office.
Sincerely,
VY&JOk—q at-.Yljj
Kimberly D. Ha%my, PE
Vice President - Engineering
Eastern Carolina Engineering, PC
cc: Randy Sipe I Camden County I file
.. ........
Eastern Carolina Engineering, PC,
P. 0. Box 128 Camden, North Carolina 27921
[phone]
www.easterncai,olitiaengiiieering.cotii

RESPONSES TO COMMENTS
A. Application (15A NCAC 02T .0106(b)):
1. The application must be signed by an authorized signature authority. The application was signed
by a former county manager that was not authorized at the time of application submittal. Address.
RESPONSE: Revised application pages 1 and 14 have been provided, bearing the name and
signature of the interim county manager.
B. Hydrouolmdc Report (15A NCAC 02T .0704(e)):
1. Address how the disposal area shall maintain a one -foot vertical separation between the seasonal
high-water table and the ground surface.
RESPONSE: Piezometers located in each infiltration basin will constantly report the groundwater
level back to the plant's data -logging software. Operators shall review the trending
data from these probes and adjust pump set points as necessary to keep the vertical
separation between one foot and eighteen (18) inches. This has been included as a
required daily plan operation task in the Operations and Maintenance Manual. Revised
pages detailing this requirement have been provided.
2. Per the Washington Regional Office Staff's request, clarify if the existing agricultural ditches near
the infiltration basins (as indicated in Section 2.2 are to be filled) were included in the flow model.
If the ditches were included, evaluate whether the filling of the ditches would affect the operation
of the infiltration basins as designed.
RESPONSE: Letter from Mr. Edwin E. Andrews, III, PG, NCLSS, hydrogeologist and soil scientist,
addresses these concerns. Copies have been provided.
C. Enjineering Plans (15A NCAC 02T .0704(c)):
1. Identify the import soil/sand material on Section A -A of Sheet C511.
RESPONSE: This material has been identified. The revised sheet has been provided.
2. Per the Washington Regional Office Staff's request, the drawings should be revised to include
details of the inlet and outlet structures for the groundwater storage pond.
RESPONSE: Details for the pond inlet and outlet have been provided on Sheet C512.
3. Per the Washington Regional Office Staff's request, the design of the infiltration basins do not
include any erosion control measures to keep material from the berms around the basins from
eroding into the basins prior to the establishment of a vegetative cover on the berms. The design
should be revised to include such measures.
RESPONSE: Sheet C304, showing a site erosion control plan, has been provided with this response
to address these concerns. Silt fence shall be installed around the infiltration basin
prior to grading of the berm and the berm shall be covered with jute matting upon
completion; an on -sheet note further instructs the Contractor to avoid and prevent soil
deposition onto the permeable sand layer.

D. Engineering Calculations (15A NCAC 02T .0704(c)(3)):
1. Provide the system curve analysis for the effluent distribution tank.
RESPONSE: Supplemental calculations and graphical data for Appendix Tab 7, Item VI relating to
the effluent distribution pumps have been provided.
2. Address the effluent BOD concentration. The application indicates less than 10 mg/L, however the
calculations indicate 30 mg/L.
RESPONSE: Revised system calculations that reflect the intended BOD5 effluent concentration of
<10 mg/L have been provided.
3. Address the effluent TSS concentration. The application indicates less than 10 mg/L, however the
calculations indicate 30 mg/L.
RESPONSE: Revised system calculations that reflect the intended TSS effluent concentration of
<10 mg/L have been provided.
E. Site Man (15A NCAC 02T .0704(d)):
1. Clarify the extent of the compliance boundary. The symbols and labels are unclear on Sheet C203.
RESPONSE: The lineweight for the compliance boundary has been increased to make it more
visible. Sheet C203 has been provided.
F. Operation and Maintenance Plan (15A NCAC 02T .0707):
1. Address if the piezometers will be regularly monitored and groundwater levels recorded.
RESPONSE: As discussed in the Response to Section B, Item 1, the piezometers will report to data -
logging software. The Operation and Maintenance Manual has been revised to indicate
that regular monitoring of this logged data is a plant operational requirement for
purposes mentioned therein.

HYOROGEOLOGY
GEOLOGY
EN\'IRONMWAL SCIENCES
sons
EDWIN ANDRE,WS & ASSOCIATES, P.C.
CONSULTING HYDROGEOLOGY AND SOIL SCIENCE
P.O. BOX 30653
RALEIGI I, N.C. 27622 - 0653
PHONE: (919) 851 - 7844
CELL: (919) 306 - 3069
November 24, 2017
Michael Brillhart, Camden County
County Manager
P.O. Box 190
Camden, N.C. 27921
Re: Additional Inronnation Response :Hydrageologic and Soils Analysis; Williams Site
Camden, NC, EAA Proj INF 1316
Dear Mr. Brillhart:
This letter addresses an additional information request pertaining to the MODFLOW simulation in
the Hydrogeologic Report.
"Hydrogeolo ig c Repo1•t
a. Section 2.2 of the report states that the existing agricultural drainage ditches in the vicinity
of the infiltration basins should be filled and Sheets C101 and C102 of the design
drawings also call for these ditches to be filled. However, the report does not state if these
ditches were included or left out of the groundwater flow model. Figure 5E shows these
ditches in the calibration model. Please clarify if the ditches were included in the flow
model and if they were, please evaluate whether or not the filling of the ditches would
affect the operation of the infiltration basins as designed."
Response:
There are two models used to simulate conditions on site. The first model calibrated to
water level data at the time of the study with the existing drains applied to the model
(Figure 1, Calibration Drains). The second model (loading model) was a transient state
model of the planned configuration. The proposed drains that were within the planned
100 foot offset drains were removed for this model (Figure 2, Proposed Flow Drains).

Fig. 1,Calibration Drains
Fig. 2, Proposed Flow Drains
Removal of the drains are within the berm area of the basins. The hydraulic conductivity of the
material used for the fill around the basins in layer 1 was one foot per day in the loading model.
The model evaluated the ditches filled with soil. The model simulated the operation of the
infiltration basins as designed.
Please contact me if you have any questions.
Very truly yours,
Edwin Andrews & Associates, P.C.
CL
Edwin E. Andrews III, P.G., N.C.L.S.S.
Consulting Hydrogeologist and Soil Scientist
encI
.
2

State of North Carolina
Department of Environmental Quality
DWR Division of Water Resources
15A NCAC 02T .0700 — HIGH -RATE INFILTRATION SYSTEMS
LiivishM of rater Resources FORM: HRIS 06-16
I. APPLICANT INFORMATION:
1. Applicant's name: Camden County
2. Applicant type: ❑ Individual ❑ Corporation ❑ General Partnership ❑ Privately -Owned Public Utility
❑ Federal ❑ State ❑ Municipal ® County
3. Signature authority's name: Stephanie Humphries per 15A NCAC 02T .0106(b) Title: Interim County Manager
4. Applicant's mailing address: P.O. Box 190
City: Camden State: North Carolina Zip: 27921-
5. Applicant's contact information:
Phone number: [phone] Email Address: shumphriesgcamdencountync.gov
II. FACILITY INFORMATION:
1. Facility name: Courthouse Area Wastewater Treatment Plant
2. Facility status: Proposed
3. Facility type: Major (> 10,000 GPD or > 300 disposal acres)
4. Facility's physical address: 407 US Hwy 158 East
City: Camden State: North Carolina Zip: 27921-7528 County: Camden
5. Wastewater Treatment Facility Coordinates (Decimal Degrees): Latitude: 36.21'21 jO Longitude: -76.8' 3"O
Datum: NAD83 Level of accuracy: Nearest second Method of measurement: Geodetic quality GPS surveX
6. USGS Map Name: Elizabeth City, NC
III. CONSULTANT INFORMATION:
1. Professional Engineer: Sean Robe y
License Number: 18550
Firm: Eastern Carolina Engineering. PC
Mailing address: 154 US Highway
158 East
City: Camden State: North Carolina Zip: 27921-
Phone number: [phone]
Email Address: sean(a)eastemcarolinainc.com
2. Soil Scientist: Edwin E. Andrews, III License Number: 1226
Firm: Edwin Andrews & Associates, PC
Mailing address: P. O. Box 30653
City: Raleigh State: NC
Zip: 27622-0653
Phone number: [phone]
Email Address: andwaterkaol.com
3. Geologist: Edwin E. Andrews, III
License Number: 3
Firm: Edwin Andrews & Associates, PC
Mailing address: P. O. Box 30653
City: Raleigh t State: NC
Zip: 27622-0653
Phone number: [phone]
Email Address: andwatergaol.com
4. Agronomist: Edwin E. Andrews
Firm:
Mailing address: same as above
City: State:
Zip: -
Phone number: (_) =
Email Address:
FORM: HRIS 06-16 Page 1 of 13

V. WASTEWATER TREATMENT FACILITY DESIGN CRITERIA —15A NCAC 02T .0705 (continued):
11. Provide the requested treatment unit and mechanical equipment information:
a. PRELIMINARY / PRIMARY TREATMENT (i.e., physical removal operations and flow equalization):
No. of
Manufacturer or
Dimensions (ft) /
Volume
Plan Sheet
Specification
Treatment Unit
Units
Material
Spacings (in)
(gallons)
Reference
Reference
Manual Bar Screen
1
Concrete & Stainless
Bars 1" O.C.
359
C503
44 42 39
Steel
Flow Splitter Box
1
Concrete
14.5x8x6
5206
C504
333601
Select
Select
Select
b. SECONDARY / TERTIARY TREATMENT (i.e., biological and chemical processes to remove organics and nutrients)
Treatment Unit
No. of
Units
Manufacturer or
Material
Dimensions (ft)
Volume
(gallons)
Plan Sheet
Reference
Specification
Reference
Anoxic Basin
4
Concrete
56x10x10
40392
C505
333601
Other
4
Concrete
9.5xl3xl7.4
16292
C506
40 00 00
Clearwell
2
Concrete
35x10x10
26182
C507
333601
Other
2
Concrete
8'o x13.8
4134
C508
40 00 00
Clearwell
1
Concrete
lOx8x8
4788
C509
333601
Select
Select
Select
c. DISINFECTION
No. of
Manufacturer or
Volume
Plan Sheet
Specification
Treatment Unit
Dimensions (ft)
Units
Material
(gallons)
Reference
Reference
Trojan / Stainless
Ultraviolet
1
Steel
16.3x2.4xl.4
308
C514, C515
43 32 63
Select
➢ If chlorination is the proposed method of disinfection, specify detention time provided: minutes (NOTE — 30
minutes minimum required), and indicate what treatment unit chlorine contact occurs:
➢ If ultraviolet (UV) light is the proposed method of disinfection, specify the number of banks: 2 number of lamps per
bank: 24 and maximum disinfection capacity: 173 GPM.
d. RESIDUAL TREATMENT
No. of
Manufacturer or
Volume
Plan Sheet
Specification
Treatment Unit
Dimensions (ft)
Units
Material
(gallons)
Reference
Reference
Select
Select
FORM: HRIS 06-16 Page 5 of 13

Professional Engineer's Certification:
I, Sean C. Robey, PE
(Professional Engineer's name from Application Item III.1.)
Courthouse Area Wastewater Treatment Plant
(Facility name from Application Item II.1.)
attest that this application for
has been reviewed by me and is accurate, complete and consistent with the information supplied in the plans, specifications,
engineering calculations, and all other supporting documentation to the best of my knowledge. I further attest that to the best of my
knowledge the proposed design has been prepared in accordance with this application package and its instructions, as well as all
applicable regulations and statutes. Although other professionals may have developed certain portions of this submittal package,
inclusion of these materials under my signature and seal signifies that I have reviewed this material and have judged it to be consistent
with the proposed design.
NOTE — In accordance with General Statutes 143-215.6A and 143-215.613, any person who knowingly makes any false statement,
representation, or certification in any application package shall be guilty of a Class 2 misdemeanor, which may include a fine not to
exceed $10,000, as well as civil penalties up to $25,000 per violation.
North Carolina Professional Engineer's seal, signature, and date:
Applicant's Certification per 15A NCAC 02T .0106(b):
I, Stephanie Humphries, Interim County Manager, Camden County attest that this application for
(Signature Authority's name & title from Application Item I.3.)
Courthouse Area Wastewater Treatment Plant
(Facility name from Application Item II.1.)
has been reviewed by me and is accurate and complete to the best of my knowledge. I understand that any discharge of wastewater
frorn this non -discharge system to surface waters or the land will result in an immediate enforcement action that may include civil
penalties, injunctive relief, and/or criminal prosecution. I will make no claim against the Division of Water Resources should a
condition of this permit be violated. I also understand that if all required parts of this application package are not completed and that
if all required supporting information and attachments are not included, this application package will be returned to me as incomplete.
I further certify that the Applicant or any affiliate has not been convicted of an environmental crime, has not abandoned a wastewater
facility without proper closure, does not have an outstanding civil penalty where all appeals have been exhausted or abandoned, are
compliant with any active compliance schedule, and do not have any overdue annual fees per 1.5A NCAC 02T .0105(e).
NOTE — In accordance with General Statutes 143-215.6A and 143-215,6B, any person who knowingly makes any false statement,
representation, or certification in any application package shall be guilty of a Class 2 misdemeanor, which may include a fine not to
exceed $10,000 a °,well 4s civil penalties up to $25,000 per violation.
Signature: Date: '� f
FORM: HRIS 06-16 Page 14 of 13

COURTHOUSE AREA
WASTEWATER TREATMENT PLANT
CAMDEN, NC
DECEMBER 4,2017
EDA INVESTMENT #04-01-07127
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VICINITY MAP
NTS
SHEET INDEX
T001 COVER PAGE
C100 SITE OVERVIEW
C101 EXISTING CONDITIONS & DEMOLITION
C102 EXISTING CONDITIONS & DEMOLITION
C200
BASE MAP
C201
ACCESS ROAD
C202
SITE PLAN
C203
SITE PLAN
C204
SITE PLAN
C304 EROSION CONTROL PLAN
C500 PLANT SCHEMATIC OVERVIEW
C501 PLANT SCHEMATIC ENLARGEMENT
C502 ELEVATION PROFILE
C503 MANUAL BAR SCREEN
C504 INFLUENT DISTRIBUTION TANK
C505 ANOXIC TANK #1 & #2
C506 AMPHIDROME® SUBMERGED ATTACHED
GROWTH BIOREACTORS
C507 CLEAR WELL #1
C508 AMPHIDROME® PLUSTM REACTOR
C509 UV DOSING TANK
C510 EFFLUENT DISTRIBUTION TANK
C511 INFILTRATION BASIN
C512 POND DETAILS
C513 GROUNDWATER PUMP TANK DETAILS
C514 EQUIPMENT DETAILS
C515 UV INSTALLATION
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VICINITY MAP
SITE DATA:
1. OWNER/DEVELOPER:
CAMDEN COUNTY
P. 0. BOX 190
CAMDEN, NC 27921
[phone]
2. SITE INFORMATION:
PIN# 028945004948490000
D.B. 245, PG. 15
TAX MAP/LOT:
SITE AREA: 35.17 AC
ZONING: LI (LIGHT INDUSTRIAL)
ADDRESS: 407 US HWY 158 EAST
EXISTING USE: CLOSED HOG FARM/AG
PROPOSED USE: WASTEWATER TREATMENT
3. MINIMUM SETBACKS AS SHOWN ON PLANS.
4. SITE IS LOCATED IN FLOOD ZONE "X"/"SHADED
X"/"AE(5')" AS SHOWN ON F.I.R.M. PANELS
3720894400K AND 3720894600K, DATED DECEMBER
16, 2005.
5. ON -SITE COVERAGE CALCULATIONS:
EXISTING (PRIOR TO DEMOLITION):
GRAVEL: 691 SF (0.05%)
BUILDING: 47,707 SF (3.30%)
TOTAL COVERAGE: 4 °
PROPOSED:
PAVEMENT/GRAVEL: 19,170 SF (1.33%)
BUILDING: 2,176 SF (0.15%)
CONCRETE: 1,043 SF (0.07%)
FUTURE ALLOWANCE: 5,000 SF (0.35%)
TOTAL COVERAGE: 27,389 SF 1.90%
RESULTING SITE COVERAGE:75,787 SF (5.25%)
6. THIS IS NOT A BOUNDARY SURVEY. BOUNDARY TAKEN
FROM SURVEY ENTITLED "RECOMBINATION PLAT
WILLIAMS FARMS OF NORTH CAROLINA, INC" DATED
4-21-2016 BY JASON A. MIZELLE, PLS, RECORDED IN
P.B. 8, PG. 19.
7. CONTRACTOR SHALL INSPECT AND MAINTAIN AS
NEEDED ALL EROSION CONTROL DEVICES ON A WEEKLY
BASIS AND AFTER EACH MAJOR STORM EVENT. FAILURE
TO KEEP ERIOSION CONTROL DEVICES IN GOOD
WORKING ORDER MAY RESULT IN THE ISSUANCE OF A
STOP WORK ORDER.
8. TOPOGRAPHIC SITE SURVEY PERFORMED BY EASTERN
CAROLINA ENGINEERING, PC IS NOTED BY BOUNDARY
LINE. ANY TOPOGRAPHIC INFORMATION OUTSIDE
BOUNDARY LINE WAS GATHERED BY REFERENCING
AERIAL IMAGERY.
9. ANY FILL BROUGHT ON SITE SHALL BE FROM AN
APPROVED SITE/MINE. ANY MATERIAL REMOVED FROM
THE SITE SHALL BE DISPOSED OF IN A SINGLE
APPROVED LOCATION.
10. TOTAL DISTURBED AREA WILL NOT EXCEED 22 ACRES.
DISTURBANCE FOR SITE CONSTRUCTION WILL NOT
EXCEED 15 ACRES AND DISTURBANCE FOR FORCEMAIN
INSTALLATION WILL NOT EXCEED 7 ACRES.
11. IF ARCHEOLOGICAL MATERIALS ARE ENCOUNTERED
DURING CONSTRUCTION, THE PROCEDURES CODIFIED AT
33 CFR 80013(B) WILL APPLY AND EDA, THE NORTH
CAROLINA STATE HISTORIC PRESERVATION OFFICE, AND
THE CATAWBA INDIAN NATION SHALL BE CONTACTED
IMMEDIATELY. ARCHEOLOGICAL MATERIALS CONSIST OF
ANY ITEMS, FIFTY YEARS OR OLDER WHICH WERE MADE
OR USED BY MAN. THESE ITEMS INCLUDE, BUT ARE
NOT LIMITED TO, STONE PROJECTILE POINTS
(ARROWHEADS), CERAMIC SHERDS, BRICKS, WORKED
WOOD, BONE AND STONE, METAL AND GLASS OBJECTS,
AND HUMAN SKELETAL REMAINS."
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VICINITY MAP
NTS
SITE DATA:
1. OWNER/DEVELOPER:
CAMDEN COUNTY
P. 0. BOX 190
CAMDEN, NC 27921
[phone]
2. SITE INFORMATION:
PIN# 028945004948490000
D.B. 245, PG. 15
TAX MAP/LOT:
SITE AREA: 35.17 AC
ZONING: LI (LIGHT INDUSTRIAL)
ADDRESS: 407 US HWY 158 EAST
EXISTING USE: CLOSED HOG FARM/AG
PROPOSED USE: WASTEWATER TREATMENT
3. MINIMUM SETBACKS AS SHOWN ON PLANS.
4. SITE IS LOCATED IN FLOOD ZONE "X"/"SHADED
X"/"AE(5')" AS SHOWN ON F.I.R.M. PANELS
3720894400K AND 3720894600K, DATED DECEMBER
16, 2005.
5. ON -SITE COVERAGE CALCULATIONS:
EXISTING (PRIOR TO DEMOLITION):
GRAVEL: 691 SF (0.05%)
BUILDING: 47,707 SF (3.30%)
TOTAL COVERAGE: 4 °
PROPOSED:
PAVEMENT/GRAVEL: 19,170 SF (1.33%)
BUILDING: 2,176 SF (0.15%)
CONCRETE: 1,043 SF (0.07%)
FUTURE ALLOWANCE: 5,000 SF (0.35%)
TOTAL COVERAGE: 27,389 SF 1.90%
RESULTING SITE COVERAGE:75,787 SF (5.25%)
6. THIS IS NOT A BOUNDARY SURVEY. BOUNDARY TAKEN
FROM SURVEY ENTITLED "RECOMBINATION PLAT
WILLIAMS FARMS OF NORTH CAROLINA, INC" DATED
4-21-2016 BY JASON A. MIZELLE, PLS, RECORDED IN
P.B. 8, PG. 19.
7. CONTRACTOR SHALL INSPECT AND MAINTAIN AS
NEEDED ALL EROSION CONTROL DEVICES ON A WEEKLY
BASIS AND AFTER EACH MAJOR STORM EVENT. FAILURE
TO KEEP ERIOSION CONTROL DEVICES IN GOOD
WORKING ORDER MAY RESULT IN THE ISSUANCE OF A
STOP WORK ORDER.
& TOPOGRAPHIC SITE SURVEY PERFORMED BY EASTERN
CAROLINA ENGINEERING, PC IS NOTED BY BOUNDARY
LINE. ANY TOPOGRAPHIC INFORMATION OUTSIDE
BOUNDARY LINE WAS GATHERED BY REFERENCING
AERIAL IMAGERY.
9. ANY FILL BROUGHT ON SITE SHALL BE FROM AN
APPROVED SITE/MINE. ANY MATERIAL REMOVED FROM
THE SITE SHALL BE DISPOSED OF IN A SINGLE
APPROVED LOCATION.
10. TOTAL DISTURBED AREA WILL NOT EXCEED 22 ACRES.
DISTURBANCE FOR SITE CONSTRUCTION WILL NOT
EXCEED 15 ACRES AND DISTURBANCE FOR FORCEMAIN
INSTALLATION WILL NOT EXCEED 7 ACRES.
11. IF ARCHEOLOGICAL MATERIALS ARE ENCOUNTERED
DURING CONSTRUCTION, THE PROCEDURES CODIFIED AT
33 CFR 80013(B) WILL APPLY AND EDA, THE NORTH
CAROLINA STATE HISTORIC PRESERVATION OFFICE, AND
THE CATAWBA INDIAN NATION SHALL BE CONTACTED
IMMEDIATELY. ARCHEOLOGICAL MATERIALS CONSIST OF
ANY ITEMS, FIFTY YEARS OR OLDER WHICH WERE MADE
OR USED BY MAN. THESE ITEMS INCLUDE, BUT ARE
NOT LIMITED TO, STONE PROJECTILE POINTS
(ARROWHEADS), CERAMIC SHERDS, BRICKS, WORKED
WOOD, BONE AND STONE, METAL AND GLASS OBJECTS,
AND HUMAN SKELETAL REMAINS."
N/F I I
BELL, MICHAEL
D.B. 295, PG. 507 APPROX. LOCATION
PIN #028946032057820000 I EX. 12" WATERLINE
ZONED: HC I I
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WILLIAMS FARMS OF) NC
D.B. 122, PG. 711 /
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PIN #0289450028685000'0
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960081.0
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IN
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II' 120' EASEMENT - VIRGINIA
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ELECTRIC & POWER COMPANY
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ELPTRIC & POWER COMPANY
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N/F
AYDLETT, SALLY B. &
JOURNEAY D.
D.B. 295, PG. 511
PIN #028946033297490000
ZONED: LI
-- -- -- -- -- --
(1HF OHE OHE
PARCEL B (0.39 AC) \ \ \ \ \ I
N/F
WILLIAMS FARMS OF INC \
D.B. 122, PG. 751 \ p%WOOD PHASE II r \
PIN #028945002868550000 \ r - s - C. A, SL. 92A
ZONED: LI \ \
-OHE OHE 1 1I
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1 \
ALL DISCHARGE FROM
DEWATERING PUMPS SHALL BEL-
\ I ROUTED THROUGH A SILT SACK / \
STOCKPILES I ,I I SEDIMENT BASIN - SEE DETAIL - - - - - - - -
I /
AREA rn' SHEET C901
I STOCKPILE II
L� SHALL HAVE
I
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AND SHALL /
o NOT EXCEED
I T� III A HEIGHT OF
cn 15' II �I ///
TEMPORARY SWALE TO o o YYY11l
DIRECT DRAINAGE TO
\ /
SKIMMER BASIN DURING
CONSTRUCTION
N/F INSTALL 10' X 15' Qo-- - - - - - - - - - - II
WILLIAMS FARMS OF N RIPRAP APRON Ld
D.B. 122, PG. 751 AT PIPE OUTLET - SF-
ZONING: 1-1 _ II
I
USE: AGRICULTURAL ��� III \ i � \ II :I � - - - - - - - - - - - - - - NEARBY R \
`� � � I `FT DWELLING
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- - - - - - - - - - - - -
-SILT FENCE SHALL B�
INSTALLED AROUND � (TYP)
TEMPORARY SKIMMER SEDIMENT BASIN SF INFILTRATION BASIN PRIOR
BOTTOM ELEV. = 4.70 / - I I I jl TO GRADING BERM.
BERM ELEV. = 7.00
SPILLWAY ELEV. = 6.00 � / / I N I I + CONTRACTOR SHALL USE
SPILLWAY WIDTH = 21' l GREAT CARE TO ENSURE /
I 6' I i \ I I I f+ THAT NO SOIL MATERIAL - - - - - - - - - - - - - - - - -
\ - STOCKPILE FROM BERM IS DEPOSITED /
TEMPORARY SWALE TO cn I R ON THE SAND -FILLED BASIN, -
DIRECT DRAINAGE TO
SKIMMER BASIN DURING - N STOCKPILE I I T�I I II 11 I
CONSTRUCTION SHALL HAVE
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AND SHALL
L` NOT EXCEED N % cn 1 I I ?- - - - - - - - - - - - - - - - - -
NA HEIGHT OF
L - J \JULIA- - - - - - - - - - - - - - - - - SUBDIVISION II
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EXISTING IRRIGATION PlDND
I II II \ 41" 14,�✓S 1<1° Jr • o �� /� �1 )y45 9
THIS HIGH RATE INFILTRATION BASIN TO BE I i 41
INSTALLED UNDER A FUTURE PROJECT.
ONCE EXISTING DITCH FILL IS COMPLETED, ��__�_ \ 7
r�r�t1� 7 �•\�4. - - - - - - - \
BASIN AREA SHALL BE SEEDED AND
MULCHED AND SURROUNDED BY SILT FENCE. r ( 11 \ L v
NO EQUIPMENT, VEHICLES OR MATERIALS «� J �~ M ��� ''r Z`' - - - - - - - - - - - -
SHALL BE PARKED OR STOCKPILED WITHIN 1 r � ~ram " o ~�° / jN ��i �� r�� {CL u,, l ��^ ` � o f ��l - VJ 0 \
THE AREA. -A\ y` ���g '�� a �/" ,\rr� !� s >= - - - - - - - - - - - - - - - - - - D.B. 25C
_ �1 / - P.C. 5,
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LEGEND
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SILT FENCE
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LIMITS OF DISTURBANCE
CHECK DAM
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VICINITY MAP
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UV DOSE TANK
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32
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BERM 5:1 MIN.
ELEV. _ ±6.50 SLOPE
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ELEV. = 2.00
ELEV. = -2.00 --FOR UNDERDRAIN DETAIL
o_ SEE SHEET C512
ELEV. = -2.50
50' MIN.
ELEV. = 9.50
- 10'
INV. = -2.00' � - - - - - - - - - -
' 15'R (TYP.)
CLEAN OUT (TYP.) J - - - - - - - - - - - -
� cp' _
ELEV. = 6.00
INV. = -3.00
P'
23' SPRAY RADIUS
SPRAY NOZZLE TO BE
12" ABOVE POND
SURFACE (TYP.)
6" SCH 80 PVC
MANIFOLD PIPE
SECTION A- A
HIGH RATE INFILTRATION BASIN DETAIL
N TS
SPRAY NOZZLE SHALL BE
3/4" WOBBLE NOZZLE
4" SUPPLY LINE
1
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--- - - - - - -
TO GROUNDWATER PUMP STATION
BASIN IS TO BE EXCAVATED TO ELEVATION -3.00.
AFTER EXCAVATION, SUBGRADE SHALL BE
INSPECTED BY AN NC LICENSED SOIL SCIENTIST.
POND SHALL BE BACKFILLED TO ELEVATION 6.00
USING SELECT POROUS POND FILL SPECIFIED IN
SPECIFICATION SECTION 33 47 23 - HIGH -RATE
INFILTRATION PONDS.
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INSTALLATION OF DRAIN MAY VARY,
NO ADDITIONAL PAYMENT WILL BE
MADE FOR STONE REQUIRED DUE TO
TRENCH CONSTRUCTION
1' MIN.
4" PVC WELL SCREEN -\
INV. = -2.00'
6" STONE BEDDING
(NCDOT 78M)
BACKFILL TO GRADE WITH
NATIVE MATERIALS
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DEWATERING DRAIN DETAIL
NTS
SENNINGER 3/4" LOW ANGLE
Xcel-WOBBLER SPRINKLER
W/ #14 NOZZEL
3/4" SCH, f
THREADED F
1" BRASS BALL
VALVE
3/4" SCH. 80 A�
NECESSARY
SPRINKLER HEAD CONNECTION
NTS
4" SUPPLY LINE
6" SCH. 80 MANIFOLD
6%4" TEE (TO BE PLACED AT
MIDPOINT OF MANIFOLD)
LENGTH AS REQUIRED AND
NECESSARY BUSHINGS
4" 90' BEND
SUPPLY LINE TO MANIFOLD CONNECTION
NTS
I i I i
I I I
I I I
I I I
I I I I
I I I
I I I
4" SCHI 40 PVC EXISTING LAGOON
i I
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I I I
I I I
I I I
I I I
I I I
I I I
I I I
I I I
PERMANENT POOL = 5.25
FX POND S/pF SCOpF
GROUNDWATER POND
INLET DETAIL
NTS
I I I I I I I I I I I
I I I I I I I I ETI I I I I I I
II I I I I I I I II I I I I
I I I I I I I I I I I I
I I I I I I I I I I I I
I I I I I I I I I I I I
12" CMP
II I� I EXISTING LAGOON
I II I I I I I I I I I I
I I I I I I I I II I I I
I I I I I I I I I I I I
I I I I I I I I I I I
I I I I I I I i I I I
I I I I I I I I I I I
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OUTLET DETAIL
NTS
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TANK BOTTOM
8" FOUNDATION STONE
3/8" GRADE 8
BOLT AND WASHER
(TYP.)
2.5' STAINLESS STEEL
CHANNEL HOLD DOWN
90' SUPPORT BRACKET
4' STAINLESS
STEEL CHANNEL
3/8" ANCHOR BOLT
(TYP.)
O
THREADED #5 REBAR
TO EXTEND 12" FROM
TANK EXTERIOR,
PROVIDED BY TANK
MANUFACTURER
UNDISTURBED EARTH
3000 PSI CONCRETE TO
PROVIDE MIN. OF 4" COVER
\ /\ FOR INSTALLED REBAR
STANDARD #4 REBAR TO
\ / EXTEND LENGTH OF TANK,
/ PROVIDED BY CONTRACTOR
/\//\//
EXTENDED BASE DETAIL
N TS
o®000000®o
0
0
0
0
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0
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0
0
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SLOTTED STAINLESS
STEEL CHANNEL
1.75'
1
SLOTTED STAINLESS
STEEL CHANNEL
TOP VIEW
LOCK NUT WITH
WASHER (TYP.)
3/8" THREADED
Y o STEEL ROD (TYP.)
3/8" BOLT HOLE
(TYP.)
PROVIDE #5 REBAR, WIDTH PER TANK DIMENSIONED DRAWING.
SPACING 12" O.C. ALONG TANK WALL EMBEDMENT 12" MINIMUM,
MIDWAY IN TANK BOTTOM. IF PRE -CAST TANKS ARE USED IN
LIEU OF CAST IN PLACE, PRE -CAST MANUFACTURER SHALL
PROVIDE DOWEL SLEEVES FOR RODS OF EQUIVALENT DIAMETER
AND DEPTH.
6"x6"x1 /4" BASE
PLATE
SQUARE TUBING
BASE PLATE
UNIT
3/8" GRADE 8
LOCK WASHER BOLT AND WASHEF
WITH NUT (TYP.) (TYP.)
FLOW DIRECTION
SLOTTE[
STEI
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FRONT VIEW
NOTES:
1. ALL STEEL MEMBERS ARE 41x41x2 (m m) STAINLESS SLOTTED STEEL CHANNEL
2. ALL BOLTS ARE TO BE 3/8" GRADE 8
SIDE VIEW
UV SUPPORT STRUCTURE DETAIL
LOCKABLE WELL COVER LOCKABLE WELL COVER
T ( ( PLUG PLUG
(LOCKING PLUG) (LOCKING PLUG)
12" MIN. PLASTIC PLUG 12" MIN. PLASTIC PLUG
36" MAX. 36" MAX.
I CONCRETE RING I CONCRETE RING
CABLE FROM LEVEL '"I III„IIIIIII Ill llI-III= I_III„IIIIIII
TRANSMITTER
PVC RISER PVC RISER
1.5" SCH. 40 2" SCH. 40
PVC PIPE PVC PIPE
4" SCH, 40 1 1 1 4" SCH. 40
NEAT CEMENT GROUT NEAT CEMENT GROUT
BENTONITE WELL SEAL BENTONITE WELL SEAL
THICKNESS 12" MIN. ,, THICKNESS 12" MIN.
TOP OF SCREEN I I I ■ I /- TOP OF SCREEN
1.5" WELL SCREEN 2" WELL SCREEN
#78 STONE #78 STONE
GLOBAL WATER WL 400 PVC BOTTOM PLUG GLOBAL WATER WL 400 PVC BOTTOM PLUG
PRESSURE TRANSDUCER PRESSURE TRANSDUCER
EXPENDABLE POINT EXPENDABLE POINT ,
GROUNDWATER LEVEL MONITORING WELL (PIEZOMETER)
N TS
N TS
1/2" HOLE FOF
ANCHOR BOLTS
1 /4" STAINLESS
STEEL PLATE
STAINLESS
G
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STEEL PLATE
3"x3"x11GA STAINLES
STEEL TUBIN
3/8" STAINLESS
STEEL ANCHOR
BOLTS
MONITORING WELL
"x16"x1/4"
JNLESS
EL PLATE
BRASS
FITTING
1 /2" PVC
CONDUIT
1/4"
STAINLESS
STEEL PLATE
CHEMICAL PUMP STAND DETAIL
NTS
N TS
3RASS
VALVE
COPPER
2LINE
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4" UV INFLUENT
PIPE
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CONTRACTOR
SHALL FABRICATE
TRANSITION BOX
2"x2"x1 /4" T304 J
STAINLESS STEEL ANGLE
FLOW
FINISH FLOOR ELEVATION - 9.00'
12
CHANNEL SHALL BE
FABRICATED FROM 1 /4"
T304 STAINLESS STEEL
1" STAINLESS STEEL
SQUARE TUBE SUPPORT
220"
1" STAINLESS STEEL
SQUARE TUBE SUPPORT
2�
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TRANSITION BOX PANELS
SHALL BE 11 GA. T304
STAINLESS STEEL
I� 12"
1.5"
-L
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- 29"
8"
4" SCH. 20
STAINLESS STEEL
TOP VIEW
12"
- - 35"
18.5"
1
SIDE VIEW
1" T304 STAINLESS
STEEL SQUARE TUBE
SUPPORT
MODULE
HARNESS
SENSOR PORT
- - - - - - - - - - - - - - - - - - - -�-WATER -LEVEL _ 12-5 - - - - - - - - - - -
1" T304 STAINLESS
STEEL SQUARE TUBING
SUPPORT (TYP,)
ALL BOLT HOLES SHALL BE
FIELD DRILLED FOR ACCURACY.
ALL BOLTS SHALL BE STAINLESS
116"
^--�- 35"
o� 17"
29
REAR VIEW
INFLUENT TRANSITION BOX
16.75"
UV LAMP (TYP.)
TOP VIEW
SIDE VIEW
ULTRAVIOLET
DISINFECTION SYSTEM
TRANSITION BOX PANELS
SHALL BE 11 GA. T304
STAINLESS STEEL
I� 12"
29"
TOP VIEW
I� 12"
35"
SIDE VIEW
N TS
11.5"
SGH. 2U
STAINLESS STEEL
EFFLUENT TRANSITION BOX
L 1" T304 STAINLESS STEEL
SQUARE TUBE SUPPORT
ALL BOLT HOLES SHALL BE
FIELD DRILLED FOR ACCURACY.
ALL BOLTS SHALL BE STAINLESS
16"
35"
o� 17"
29
REAR VIEW
L FIXED WEIR
MODULE
HARNESS
FIXED WEIR
FINISH FLOOR ELEVATION - 9.00'
2"x2"x1/4" T304 STAINLESS
STEEL ANGLE
CONTRACTOR
SHALL FABRICATE
TRANSITION BOX
FLOW
FLOW
6" UV
EFFLUENT
1" T304 STAINLESS
STEEL SQUARE
TUBING SUPPORT
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160116 - Camden County Courthouse Area WWTP Head Loss
Effluent Distribution Pump Pipe Head Loss
C= 150 Hazen Williams
V = Q/A
Hf = 10.44*L*QA1.85
CA1.85*DA4.87
nm = lv-L)-r'1Lg
4" Main: D =
4
in
Diameter
L =
442
If
Length
A =
0.09
sf
Area
K =
9.50 Calculated
Value
Static Head =
5.17 ft
Laterals: D =
0.75
in
Diameter
L =
12
If
Length
A =
0.0031
sf
Area
K=
1.00Calculated
Value
Static Head =
19 ft
Total head includes pipe run from pump discharge
through 4" line, plus runs through 14x 3/4" laterals and
spray heads.
Pump: HOMA - TP50M54L/2/3 (per lateral;
Pump Curve
pump
q head
0 85
20 79
40 74
60 69
80 65
100 61
120 57
140 54
160 50
180 47
200 43
220 40
240 36
260 32
Q
V
Hf
Hm
Static Head
Total Head
0
0.00
0.0
0.0
5.2
5.2
10
0.26
0.0
0.0
5.2
5.2
20
0.51
0.1
0.0
5.2
5.3
30
0.77
0.3
0.1
5.2
5.5
40
1.02
0.5
0.2
5.2
5.8
50
1.28
0.7
0.2
5.2
6.1
60
1.53
1.0
0.3
5.2
6.5
70
1.79
1.3
0.5
5.2
7.0
80
2.04
1.7
0.6
5.2
7.5
90
2.30
2.1
0.8
5.2
8.0
100
2.55
2.5
1.0
5.2
8.7
110
2.81
3.0
1.2
5.2
9.4
120
3.06
3.6
1.4
5.2
10.1
130
3.32
4.1
1.6
5.2
10.9
140
3.57
4.7
1.9
5.2
11.8
150
3.83
5.4
2.2
5.2
12.7
160
4.08
6.1
2.5
5.2
13.7
170
4.34
6.8
2.8
5.2
14.7
180
4.59
7.6
3.1
5.2
15.8
190
4.85
8.4
3.5
5.2
17.0
200
5.10
9.2
3.8
5.2
18.2
210
5.36
10.1
4.2
5.2
19.5
220
5.61
11.0
4.7
5.2
20.8
230
5.87
11.9
5.1
5.2
22.2
240
6.13
12.9
5.5
5.2
23.6
250
6.38
13.9
1 W.0
1 5.2
1 25.1
Q
V
Hf
Hm
Static Head
Total Head
Sum
0
0.0
0.0
19.0
19.0
24.2
10/14
0.52
0.0
0.0
19.0
19.0
24.2
20/14
1.04
0.1
0.0
19.0
19.1
24.4
30/14
1.56
0.2
0.0
19.0
19.2
24.8
40/14
2.07
0.3
0.1
19.0
19.4
25.2
50/14
1 2.59
0.5
0.1
19.0
19.6
25.7
60/14
3.11
0.7
0.2
19.0
19.9
26.4
70/14
3.63
0.9
0.2
19.0
20.1
27.1
80/14
4.15
1.2
0.3
19.0
20.5
27.9
90/14
4.67
1.5
0.3
19.0
20.8
28.9
100/14
5.19
1.8_M
d
1.2
29.9
110/14
5.70
2.2
0.5
19.0
21.7
31.0
120/14
6.22
2.6
0.6
19.0
22.2
32.3
130/14
6.74
3.0
0.7
19.0
22.7
33.6
140/14
7.26
3.4
0.8
19.0
23.2
35.0
150/14
7.78
3.9
0.9
19.0
23.8
36.5
160/14
8.30
4.3
1.1
19.0
24.4
38.1
170/14
8.82
4.9
1.2
19.0
25.1
39.8
180/14
9.33
5.4
1.4
19.0
25.8
41.6
190/14
9.85
6.0
1.5
19.0
26.5
43.5
200/14
10.37
6.6
1.7
19.0
27.2
45.4
210/14
10.89
7.2
1.8
19.0
28.0
47.5
220/14
11.41
7.8
2.0
19.0
28.8
49.6
230/14
11.93
8.5
2.2
19.0
29.7
51.9
240/14
12.44
9.2
2.4
19.0
30.6
54.2
250/14
12.96
9.9
2.6
19.0
31.5
56.6
Operation Point: 193 gpm @ 44 tdh

Groundwater Lowering System
It is expected that the wet well, pump, and associated equipment with the groundwater pump
station will comprise part of normal, routine plant facility examinations by operators on
duty. It is also critical for operators to routinely monitor the groundwater levels within each
infiltration basin to ensure the groundwater lowering system removes only the water
necessary to maintain proper infiltration.
As such, the following shall be included in daily plant operation tasks:
1. Verify the continued good operation of the groundwater pump.
2. Inspect the water level in the groundwater lowering pump wet well.
3. Review logged sensor data for wet well level and groundwater level.
4. Adjust the groundwater pump set points, if necessary:
a. Lower the elevations in the pump "on" and "off' set points if it is found that
the difference between the average piezometer groundwater level and the
ground surface is less than one foot.
b. Raise the elevations in the pump "on" and "off' set points if it is found that
the difference between the average piezometer groundwater level and the
ground surface is greater than 1.5 feet (eighteen inches).
To avoid overcorrection, operators should keep in mind the inherent lag time
between set point changes and their effect on groundwater level observations.
In addition to these tasks, the following shall be done quarterly:
1. Remove water level sensors from monitoring wells and gently scrub screen with
clean water and toothbrush. Follow manufacturer's recommendations if re -
calibration is required.
The following shall be done semi-annually, or as recommended by the manufacturer:
1. Verify water level sensor calibration according to manufacturer's procedure.
The following shall be done annually, between April 15 and May 31:
1. An independent wetland consultant shall be contracted to evaluate the following
characteristics of the wetlands adjacent to the dewatering drain system, and provide
these results in the form of a written report:
a. Wetland plant growth and health.
b. Presence and depth of water table.
c. Hydric soil conditions.
2. The results of this report shall be compared to historical data from previous reports
and the three wetland monitoring wells. If it is determined that dewatering operations
have had a measurable, adverse effect on the wetland plant growth or water table
.o

depth, remedial actions shall be taken. These actions shall be considered semi-
permanent to permanent solutions, and will be undertaken only under the design
direction of a licensed Professional Engineer. Remedial actions may consist of, but
are not limited to:
a. Installation of a pump at the south end of the discharge pond, with spray
nozzle discharging water into wetlands.
b. Installation of a low -permeability barrier, such as a curtain wall, between
dewatering drain and wetlands.
Recordkeeping
Records shall be kept on maintenance activities that directly impact any logged data.
Maintenance and calibration of level sensors shall be dated and signed by the operator or
manufacturer's representative performing these activities.
It is further recommended to keep a record of any maintenance activities resulting in repair
to facilities, ponds, or basins.
41

COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
AMPHIDROME® PROCESS SYSTEM (Patent # 5,776,344)
Courthouse Area Wastewater Treatment Plant
SECTION I. SCOPE OF WORK
The work under this section includes furnishing, installing and testing an Amphidrome® process
system. A single manufacturer shall supply the product. The manufacturer shall have a
minimum of five (5) years experience in the design and manufacture of factory -built BOD
removal, nitrification and denitrification process reactor systems.
The contractor shall install the system as shown on the plans and described here in. The system
will include the following: influent pump(s), reactor internals (i.e. block distribution under drain,
stainless steel under drain, media support gravel, process filtration media, sump cover plate(s)),
return flow/ backwash pumps, backwash check valve(s), backwash air blower(s), process air
blower(s), denitrification process water supply pump(s), effluent pump(s), chemical feed
system(s), and system process control panel/PLC.
The Amphidrome° process system shall be designed to operate under the conditions indicated in
Design Criteria and Data.
The Amphidrome® process system is especially designed for the simultaneous removal of BOD,
ammonia, suspended solids, and nitrate -nitrogen. A license to use the process and apparatus
shall be provided by the manufacturer of the Amphidrome® process system.
The manufacturer of the Amphidrome® process system shall be F.R. Mahony & Associates, Inc.
of Rockland, Massachusetts under license from De Nora Water Technologies, Inc. of Pittsburgh,
PA.
The manufacturer shall have a minimum of
manufacture of factory -built BOD Removal,
systems.
Design Criteria: Effluent
BOD5
TSS
Fecal Coliform
Total Nitrogen
Total Phosphorous
Flow
five (5) years experience in the design and
nitrification and denitrification process reactor
Limit
< 10 mg/L
< 15 mg/L
< 14 per 100 ml
< 4 mg/L
< 2 mg/L
49,950 gpd
Amphidrome® Process System
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
2.0 AMPHIDROME® REACTORS
This design is a dual -train system consisting of two (2) 9.5' W x 13' L Amphidrome® reactors
and one (1) 8' Diameter Amphidrome® Plus denite reactors. All tanks will be made of cast in
place concrete. Selected internals shall be furnished by the manufacturer.
2.1 REACTOR VESSELS
The reactor vessels shall be furnished and installed by the contractor and be made of reinforced
concrete with dimensions and specifications as shown on the drawings. Each vessel shall be
field assembled by the installing contractor complete with reactor internals, process and
backwash air header, backwash trough, backwash check valve, and inlet and outlet piping.
2.2 AMPHIDROMEV REACTOR INTERNALS
The Amphidrome® reactor internals shall be installed in concrete tanks as shown on the plans.
Amphidrome® internals shall include the under drain system, backwash air distribution headers
and laterals, gravel support layers, filtration media and precast concrete under drain blocks. The
under drain system shall be the nozzleless type, designed for the simultaneous application of air
and water during backwash. The backwash air distribution system shall be separate and
independent from the backwash water distribution system. The air distribution system shall be
covered to prevent intrusion of media or media support materials. The under drain system shall
include effluent sump cover plates, backwash air distribution header and laterals and air and
water distribution blocks. These internals shall be provided by one manufacturer.
2.2.1 SUMP COVER PLATES
A sump or trough shall be provided under the filter under drain system. The sump shall be
covered with concrete sump cover plates at least 4-1/2" thick, spaced to provide openings for
ingress and egress of backwash water and filtrate, and to support the full weight of the filter
media and gravel support. The sump covers shall be grouted in place in the field by the
installation contractor. The sump covers shall be provided by the process manufacturer.
2.2.2 AIR DISTRIBTUION HEADER AND LATERALS
The air used during the process and the backwash shall be distributed evenly over the entire area
of each filter vessel through an air header and laterals placed on the floor of the filter.
Air laterals shall extend completely across the filter floor under alternate rows of air and water
distribution blocks. The air header and laterals shall be type 304 stainless steel. Holes shall be
drilled in each air lateral to provide a separate air discharge port for each air dome in the air and
water distribution blocks. A minimum of four air discharge ports shall be provided for each
square foot of filter bottom area. No plastic pipe or conduit shall be used for the air distribution
system unless shown differently on the plans.
2.2.3 AIR AND WATER DISTRIBUTION BLOCKS
The sump cover plates and the air distribution laterals shall be covered completed with precast
concrete air and water distribution blocks to distribute backwash air and water uniformly over
the entire filter area. The blocks shall have HDPE jackets with interlocking spacer lugs to
prevent block displacement. The blocks shall be factory -cast in an established precast concrete
factory, which has been casting similar products for at least five years. The concrete used shall
Amphidrome® Process System
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
be of high quality having a 28-day compressive strength of not less than 5,000 psi and employing
not larger than 1 /2" maximum coarse aggregate. Each block shall be case without reinforcement,
have a dense and smooth surface and be hollow and open at the bottom.
Air domes shall be cast into the bottom surface of each block to receive air from each air
discharge port in the air laterals. Each air dome shall have an unrestricted air/water discharge
port. At least eight air/water discharge ports shall be provided for each square foot of filter
bottom area.
2.2.4 BACKWASH TROUGH
A backwash trough shall be supplied to collect the return flow and backwash water. It shall be
flanged on the ends and mate to the reactor wall and the return flow/backwash pipe. The trough
will be secured at the opposite end with a bracket connected to the inside of the reactor vessel.
All material shall be 304 stainless steel.
2.2.5 REACTOR MEDIA
The process reactor under drains shall be covered with a minimum of 18" of gravel arranged
carefully in five layers. Each gravel layer shall consist of hard, durable, rounded particles of
washed gravel having a specific gravity of not less than 2.6. The gravel shall be uncrushed
naturally occurring materials and shall contain not more than 2% by weight of thin, flat, or
elongated pieces (pieces having a ratio of largest dimension to smallest dimension greater than
5:1) as determined by handpicking from a representative sample, in accordance with AWWA
Specification B 100-89. The gravel shall be washed free from shale, mica, sand, clay, loam, and
organic impurities of any kind. The washed and dried gravel, when digested for a period of 24
hours in cold, strong hydrochloric acid shall not suffer weight loss in excess of 5%. The percent
voids in any layer shall not be less than 35% or greater than 45%.
The gravel layers shall be sized as follows:
Top
4"
1 /2"
to 1 /4"
Next
4"
1/4"
to 1/8"
Next
4"
1 /2"
to 1 /4"
Next
2"
3/4"
to 1/2"
Bottom
4"
1-1/2" to 3/4"
A layer of silica sand media, eight feet, six inches (8'6") deep in the Amphidrome® reactors
shall be placed on top of the gravel support layers. The sand shall pass a 6 x 9 mesh, well
rounded, not flat or angular, with a maximum uniformity coefficient of < 1.4. The hardness shall
be 6 to 7 on the MOH scale and the minimum specific gravity shall be 2.6. The hydrochloric
acid solubility shall not exceed 0.3% when tested. The media should have a sphericity of > 0.8
as determined by methods described in Elements of Water Supply and Wastewater Disposal,
second edition, 1971, pages 404-406, Fair, Geyer, Okun, John Wiley & Sons, Inc.
2.3 AMPHIDROME PLUS® DENITE REACTOR INTERNALS
The Amphidrome Plus® reactor internals shall be installed in contractor supplied concrete
vessels as shown on the plans. All air piping is by the contractor. Reactor internals shall include
the under drain, (i.e. backwash and process air distribution header and laterals), gravel support
Amphidrome® Process System
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
layers, backwash trough, and filter media. The under drain system shall be the nozzleless type,
designed to distribute evenly, both process and backwash air.
The under drain system serves to distribute air and water uniformly over the entire area of the
reactor vessel, as well as to support the gravel and filter media. The under drain system shall
consist of 304 stainless steel channels and 304 stainless steel 3-1/2" diameter spacer pipes
spanning the full width of the reactor vessel. A Schedule 10, 304 stainless steel pipe backwash
shall be located immediately below the steel channels. The air header and steel channels shall
have drilled holes to uniformly distribute backwash air. Slots between the spacer pipes and the
steel channels shall uniformly distribute backwash water as well as collect filtrate.
2.3.1 BACKWASH TROUGH
A backwash trough shall be supplied to collect the return flow and backwash water. It shall be
flanged on the ends and mate to the reactor wall and the return flow/backwash pipe. The trough
will be secured at the opposite end with a bracket connected to the inside of the reactor vessel.
All material shall be 304 stainless steel.
2.3.2 REACTOR MEDIA
The process reactor under drains shall be covered with a minimum of 18" of gravel arranged
carefully in five layers. Each gravel layer shall consist of hard, durable, rounded particles of
washed gravel having a specific gravity of not less than 2.6. The gravel shall be uncrushed
naturally occurring materials and shall contain not more than 2% by weight of thin, flat, or
elongated pieces (pieces having a ratio of largest dimension to smallest dimension greater than
5:1) as determined by handpicking from a representative sample, in accordance with AWWA
Specification B 100-89. The gravel shall be washed free from shale, mica, sand, clay, loam, and
organic impurities of any kind. The washed and dried gravel, when digested for a period of 24
hours in cold, strong hydrochloric acid, shall not suffer weight loss in excess of 5%. The percent
voices in any layer shall not be less than 35% or greater than 45%.
The gravel layers shall be sized as follows:
Top
4"
1 /2"
to 1 /4"
Next
4"
1 /4"
to 1 /8"
Next
4"
1/2"
to 1/4"
Next
2"
3/4"
to 1/2"
Bottom
4"
1-1/2" to 3/4"
A layer of silica sand media, four and a half feet (4.5') deep in the Amphidrome® Plus reactor,
shall be placed on top of the gravel support layers. The sand shall be 6 x 9 mesh, well rounded,
not flat or angular, with a maximum uniformity coefficient of < 1.4. The hardness shall be 6 to 7
on the MOH scale and the minimum specific gravity shall be 2.6. The hydrochloric acid
solubility shall not exceed 0.3% when tested. The media should have sphericity of > 0.8 as
determined by methods described in Elements of Water Supply and Wastewater Disposal,
second edition, 1971, pages 404 — 406, Fair, Geyer, Okun, John Wiley & Sons, Inc.
Amphidrome® Process System
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
3.00 PROCESS EOUIPMENT
3.01 AIR BLOWERS
Two (2) Kaeser CB131C Compak blower units shall be supplied to provide backwash and
process air to the Amphidrome® reactors. The blowers shall use a VFD to provide a capacity of
80 cfm to 400 cfm each at 9 psig, and shall be driven by 20 hp, three phase, 60 Hertz, 460 volt
motors.
The blowers shall be as follows:
1. The blower package shall be a Com-pak Plus as manufactured by Kaeser
Compressors, Inc., or an approved equal, which meets all the requirements of this
specification. Alternate blower selections must be shown on a List of Exceptions to
the Specifications with itemized descriptions of how the selection differs from the
specifications.
2. Nameplates stating the name of the manufacturer, blower/blower package model
number, blower/blower package serial number, the rated capacity, speed, and other
pertinent data, shall be attached to each blower/blower package.
3. Nameplates stating the name of the manufacturer, the motor model number, the motor
serial number, the rated horsepower, speed, voltage, amps, rated service factor, and
other pertinent data, shall be attached to the motor.
4. The blowers shall be positive displacement, rotary tri-lobe type, designed for air or
other inert gas service, and belt driven via electric motor.
5. The casing shall be made of high strength, close grained, cast iron, and shall be
adequately ribbed to resist deflection and facilitate cooling. The casing shall be
precision machined to allow for minimum clearances. The design of the housing shall
allow for vertical or horizontal blower installation with minimal modification. The
casing design shall incorporate channels at the discharge port to minimize pulsation.
6. The rotor assemblies shall be one piece and precision machined from high strength,
close grain, spheroidal graphite ductile iron allowing smooth, efficient operation at all
rated speeds and pressures. Rotors shall be closed -end using a threaded plug. The
integral shafts shall be designed to carry higher loads than calculated for the
maximum design load and shall incorporate replaceable seal ring wear sleeves. The
rotor assemblies shall be statically and dynamically balanced. Removal of material
from the face of the rotor for balancing purposes is not allowed. The rotors shall be a
tri-lobe design in order to minimize pulsation and noise.
7. The gear -end plate shall be cast iron. The drive -end plate shall be integral to the
blower casing ensuring heavy-duty construction, long life, and maximum machine
noise attenuation in all applications. Bearing fits shall be precision machined to
ensure accurate positioning of the rotors in the casing. Replaceable seal wear inserts
shall be provided on the drive -end and gear -end plates.
8. The end plate covers shall be heavy-duty cast iron with a precision -machined sealing
face.
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
9. Aluminum oil sump covers are not allowed.
10. The rotor timing gears shall be precision machined from case hardened and ground
alloy steel. Each timing gear shall be straight cut and beveled to eliminate axial
bearing loads and ensure long life as well as quiet operation.
11. Gears shall be finish ground on a precision grinder to ensure concentricity. The
timing gear set shall be taper -mounted on the rotors for improved rebuild ability and
accurate timing. Keyed, hub mounted, or taper -pinned timing gear mounting designs
are not acceptable.
12. All four shaft support locations shall incorporate large, heavy-duty cylindrical roller
bearings designed to handle extreme radial loads without sacrificing product integrity
and reliability. The minimum acceptable L10 design life at the blower's maximum
rated speed and maximum rated differential pressure shall be no less than 70,000
hours.
13. Both the gear -end and the drive -end of the blowers shall be oil splash lubricated for
minimal maintenance and long service life. Grease lubricated bearings are not
acceptable. The lubrication design shall ensure adequate lubrication of the timing
gears and bearings.
14. There shall be four (4) piston ring type labyrinth seals at each end of each rotor to
minimize leakage and maintenance costs.
15. The cavity between the air -side and oil -side seals shall be vented through threaded
ports to allow external purging or containment of any lubricating oil or process gas
that may have migrated past the seals. Enough ports shall be incorporated in the
design to ensure that the cavity is vented from the bottom no matter what blower
drive -to -driven shaft orientation is utilized.
16. A vent cavity shall be provided on all four (4) sets of piston ring type labyrinth seals.
The two (2) vent holes located on the bottom side of the blower shall be left open.
The vent holes at other locations shall be closed off with threaded metal plugs.
17. The input drive shaft seal shall be a high temperature radial lip type seal with Viton
elastomers. The seal design shall incorporate a replaceable wear sleeve on the input
drive shaft.
18. Drive motors shall be designed, manufactured, and tested in accordance with the
latest revised editions of NEMA MG-1, IEC, IEEE, ANSI, and AFBMMA standards
as applicable and shall be capable of continuous operation.
19. The motor nameplate horsepower rating shall not be exceeded at the design speed.
20. The temperature rise of the motor windings shall not exceed IEC and NEMA
standards when the motor is operated continuously at the rated horsepower, rated
voltage, and rated frequency in ambient conditions of 40 'C.
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40 00 00- 6

COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
21. The motors shall conform to the following:
Mounting:
Horizontal
Type:
Squirrel Cage Induction
Enclosure:
Totally Enclosed - Fan Cooled
Service Factor:
1.15
Duty Cycle:
Continuos
Ambient Temperature Rating:
40 °C
Starting Current:
6X Full Load Current Maximum
Winding Insulation:
Class F
Temperature Rise:
Class B
Voltage/Frequency/Phase
230 or 460/60/3
Bearing Lubrication:
Oil, Oil Mist, or Grease (with grease addition
fittings and grease relief fittings)
Maximum Speed:
3,600 rpm
Speeds:
Variable Speed
22. The packaged blowers are to be standard engineered designs of a CE certified
manufacturer regularly engaged in the production of packaged blowers to ensure
single source accountability and shall include the following listed standard features:
(a) The packages shall be driven through V-belts and sheaves. The drive assembly
shall be of the high capacity type, oil and heat resistant, with a minimum service
factor of 1.5.
(b) Automatic tensioning of the V-belts by use of a pivoting, swing frame motor
base with adjustable spring assistance and visual indication of V-belt tension
shall be provided to ensure the V-belts remain properly tensioned with minimal
maintenance and to extend V-belt, sheave, and bearing life. Adjustment of the
tensioning device shall be accomplished without removal of the guard or
loosening of the motor mounting bolts.
(c) The drive guard shall be the manufacturer's standard sheet metal with provision
for ventilation. The installed guard shall be fully enclosed, easily removable, and
designed to meet current OSHA recommendations and CE standards.
(d) The base shall be an elevated, rigid, fabricated steel design with a solid sub -base.
The absorptive type discharge silencer shall be integral to the frame in order to
minimize space requirements. The blower shall be mounted horizontally for a
compact frame.
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
(e) To prevent transmission of vibration and noise, as well as secure the package to
the foundation, the base shall include vibration isolators made of rubber in a steel
footing equipped with mounting holes for anchoring purposes.
(f) Oil drains from the blower drive -end and gear -end lubricating oil sumps shall be
piped to the front of the base for ease of maintenance. The drain valves shall be a
ball valve with a fully retained and gasketed threaded cap.
(g) The inlet filter shall be integral to the inlet silencer and shall include a washable
and reusable polyester element for minimal pressure drop.
(h) The inlet silencer shall be of the absorptive type, directly connected to the inlet
port of the blower, and shall be mounted horizontally.
(i) The discharge silencer shall be of the absorptive type with an integral pulsation
dampener and directly connected to the outlet port of the blower. The discharge
silencer shall be mounted horizontally and shall be integral to the base frame.
(j) The relief valve shall be spring loaded and factory installed in a location to
protect the blower from excessive differential pressures. The relief valve exhaust
shall be piped out of the enclosure.
(k) An unloaded start valve shall be provided and factory installed to allow the
motor to accelerate prior to system pressurization and eliminate pneumatic
shock.
(1) An elastomeric compensator/flex connector shall be provided for connection of
the packaged blower to the system piping to reduce transmission of structure
borne noise as well as prevent unacceptable loading of the silencer connection
and blower casing.
(m) A sound enclosure shall be provided. The sound enclosure shall be sheet steel
construction with powder coat finish. It shall have acoustic foam insulation and
shall provide sound attenuation of up to 20 dB (A). The enclosure shall have a
hinged panel on top and a removable panel on the front of the package to allow
maintenance access. Panels shall incorporate locking closures. An installed,
integral ventilation fan, sized to provide adequate cooling of the package, shall
be provided.
(n) A pressure gauge shall be provided, pre -piped and panel mounted, on the sound
enclosure.
(o) A temperature gauge, with adjustable switching point and contact, shall be
provided pre -piped and panel mounted on the sound enclosure.
(p) A filter differential pressure gauge shall be provided pre -piped and panel
mounted on the sound enclosure.
(q) The blower package shall be designed to allow all preventive maintenance to be
performed from the front of the package. All utility connections and process
connections shall be at the rear of the package.
Amphidrome® Process System
40 00 00- 8

COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
(r) The blower package shall be capable of being installed directly adjacent to
another blower packages of similar design and shall be capable of mounting next
to the wall without maintenance interference.
23. All critical dimensions of the blower components actually provided by the
manufacturer shall be verified and documented prior to assembly.
24. The rotating parts of each blower actually provided by the manufacturer shall be
statically and dynamically balanced before final assembly. The blower alone shall
operate without excessive vibration. Removal of material from the face of the rotors
for balancing purposes is not allowed.
25. Each blower actually provided by the manufacturer shall be slip tested. The Slip
RPM shall be documented. Each bare blower provided by the manufacturer shall be
operated at its maximum rated speed and differential pressure for thirty (30) minutes.
A document certifying that the supplied blowers conform to the design specifications
shall be provided.
26. On completion of final assembly of the packaged blower and prior to shipment, each
packaged blower shall be mechanically run for a minimum of fifteen (15) minutes.
27. The blowers and equipment covered by this specification are intended to be standard
blower equipment, of proven ability, as manufactured by a reputable CE certified
manufacturer having at least two (2) years experience in the production of such
blowers. The blowers furnished shall be designed, constructed, and installed in
accordance with the best practice and methods and shall operate satisfactorily when
installed.
28. All equipment furnished under this specification shall be new, unused, and shall be
the standard product of a manufacturer having a successful record of manufacturing
and servicing the equipment and systems specified herein for a minimum of two (2)
years.
3.03 INFLUENT DOSING PUMPS
Two (2) Flygt grinder pumps shall be supplied by the system supplier to provide water from the
influent dosing tank to the anoxic tanks. The pumps will be Flygt MP3102.890 (i.e. submersible,
grinder, centrifugal, explosion -proof), with a capacity of 125 gpm at 31' TDH, and shall be
driven by a 6 hp, three phase, 60 Hertz, 460 volt motor.
3.04 CLEARWELL REVERSE FLOW/BACKWASH PUMPS
Four (4) reverse flow/backwash pumps shall be supplied by the system supplier to pump the
water from the clear well to the Amphidrome® reactor during the cyclical process and during
backwash. The pumps will be HOMA AMX434-184/4.OD, (i.e. submersible, centrifugal), each
with a capacity of 370 gpm at 28' TDH, and shall be driven by a 4.0 hp, three phase, 60 Hertz,
460 volt motor.
3.05 AMPHIDROME® PLUS DENITE FEED PUMPS
Two (2) Amphidrome® Plus feed pumps shall be supplied by the system supplier to provide
water from the clear well to the Amphidrome® Plus reactor. The pumps will be HOMA
Amphidrome® Process System
40 00 00- 9

COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
TP50V24/2/3 (i.e. submersible, centrifugal), with a capacity of 63 gpm at 20' TDH, and shall be
driven by a 1.9 hp, three phase, 60 Hertz, 460 volt motor.
3.06 AMPHIDROME® PLUS DENITE BACKWASH PUMPS
One (1) backwash water supply pump shall be supplied by the system supplier to provide
backwash water from the UV feed tank to the Amphidrome® Plus (i.e. denitrification) reactor.
The backwash pump will be HOMA AMX434-178/4.OD Series (i.e. submersible, centrifugal),
with a capacity of 300 gpm at 19' TDH, and shall be driven by a 2.9 hp, three phase, 60 Hertz,
460 volt motor.
3.07 UV FEED PUMPS
Two (2) UV feed pumps shall be supplied by the system supplier to provide water from the UV
feed tank to the UV treatment unit. The pumps will be HOMA TP50V24/2/3 (i.e. submersible,
centrifugal), with a capacity of 95 gpm at 14' TDH, and shall be driven by a 1.9 hp, three phase,
60 Hertz, 460 volt motor.
3.08 EFFLUENT (IRRIGATION) PUMPS
Two (2) effluent (irrigation) pumps shall be supplied by the system supplier to provide water
from the effluent tank to the high -rate infiltration basin irrigation system. The pumps will be
HOMA TP50M54L/2/3 (i.e. submersible, centrifugal), with a capacity of 173 gpm at 15' TDH,
and shall be driven by a 4.7 hp, three phase, 60 Hertz, 460 volt motor.
3.09 COAGULANT FEED SYSTEM (Sodium Bi-Carbonate)
The coagulant feed system will include three (3) LB-04SA-PTC1-G19 (Pulsafeeder) pumps.
The pumps shall be LB-04SA-PTC 1-G 19, 120 volt, single-phase, capable of pumping 1.0 gph at
110 psi.
3.10 CARBON FEED SYSTEM (Micro-C)
The carbon feed system will include two (2) LB-04SA-PTC 1-G 19 (Pulsafeeder) pumps. The
pump shall be LB-04SA-PTC1-G19, 120 volt, single-phase, capable of pumping 1.0 gph at 110
psi.
3.11 ALKALINITY FEED SYSTEM (PAC)
The alkalinity feed systems will include two (2) LB-04SA-PTC1-G19 (Pulsafeeder) pumps. The
pump shall be LB-04SA-PTC1-G19, 120 volt, single-phase, capable of pumping 1.0 gph at 110
psi.
3.12 CHEMICAL FEED TANKS
Provide two (2) 300 gallon chemical feed tanks with mixers. Chemical feed tanks shall be
PulsaTRON 42409. Mixers shall be PulsaTRON 42729.
3.13 FLOAT SWITCHES
Twenty-two (22) float switches, for locations as indicated on the plans, will be furnished with
fifty feet (50') of cord. The floats will be "Mini Float" as manufactured by Anchor Scientific,
Inc., Long Lake, Minnesota 55356.
3.14 GROUNDWATER PUMPS AND FLOATS are covered by separate specification.
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
4.0 AMPHIDROME® CONTROL SYSTEM
The operational scheme of the Amphidrome® control system shall be initially set by the system
supplier and shall be under the control of the system supplier until the performance testing is
complete.
4.1 PANEL AND INSTRUMENTS
1. A separate main control panel shall be supplied to operate the Amphidrome® process system. The
main control panel shall be a wall -mounted NEMA 1 enclosure. The panel shall be shop wired to
terminal strips for connection to field wiring as necessary.
2. The panel shall contain a programmable logic controller (PLC) and the necessary equipment,
instruments, ancillary control devices, hardware and programmable logic control to perform the
automation functions of the Amphidrome® process system. Panel devices shall also enable the operator
to perform manual backwash sequencing for the reactors, and operation of pumps, blowers and auxiliary
equipment. The panel will also include a full function 12" HMI touch screen.
The panel shall have, at a minimum, the following items:
A. a lock hasp on outside door. (lock to be provided by owner)
B. an internal Web Server
C. remote access and control capabilities via an internet connection
D. Ethernet access to the PLC via the internet
E. Ethernet communication between the touch screen and the PLC
F. graphical display of runtime events with time stamp for each event
G. store runtime event data on removable media devices
H. the ability to modify operational parameters remotely
I. graphical display of overall system status
J. graphical display of subsystems and associated equipment — accessed from the overall status
screen
K. a motor circuit protector with adjustable overload setting for each pump.
L. a magnetic contactor for each pump
M. main circuit breaker for alarm and control circuits, separate from each pump.
N. separate auxiliary circuit breakers for alarm and control circuits.
O. alarm switch for On -Off and Test.
P. outside alarm horn.
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
Q. a terminal strip for connecting pumps and controls.
R. green run light for pump.
S. Pump motors controlled by H-O-A switches and magnetic starters in conjunction with liquid
level sensors.
T. an elapsed time meter for each pump.
U. dosing cycle counter for each pump.
V. a schematic diagram shall be provided.
W. A weatherproof 110V receptacle.
X. Alarm lights shall remain lighted until reset button is actuated by the operator.
Y. Audible alarm shall automatically reset when alarm condition no longer exists or silence button
has been actuated by the operator
Z. Latching alarm
AA. Automatic pump sequencer
BB. an override circuit to start both pumps if level rises in sump or to start second pump if one pump
fails.
3. All VFD's, motor starters, and relays required for the pumps and blowers.
4. All indicator lights, switches and wiring for a complete SAGB® control system.
5. All alarms and warnings shall be communicated to the RTU via a mod -bus connection.
4.2 — JUNCTION DISCONNECT BOXES
Disconnect junction boxes shall be provided for all submersible pump motors. The disconnect
junction box assembly shall be NEMA 4X fiberglass and shall contain an individual disconnect
switch for each motor serviced. In addition to meeting NEC requirements for a local disconnect
switch, the disconnect junction box also serves to isolate the wet -well wiring from the plant
wiring. Thereby eliminating the possibility of gases, which may become corrosive, in the wet -
well from entering the main control panel. This is accomplished by constructing the junction
box into two isolated chambers. Conduits containing pump motor power cords and float switch
wiring shall enter the lower compartment which is vented to atmosphere. The wires then pass,
unspliced through the dividing wall into the upper compartment. Entry of the pump and float
wiring into the upper compartment shall be through strain relief cord grips, properly sized for the
cables. The strain relief cord grips will act as the sealing device between the upper and lower
compartments. Disconnect boxes must be clearly identified with stenciled paint letters. Each
pump disconnect must be labeled. For example, "Effluent Pump Disconnect".
Plant wiring from the main control panel will enter the upper compartment of the disconnect
junction box and terminate on the pump disconnect switches. The upper compartment will also
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
contain terminal blocks for termination of the float switches and main panel float switch control
wiring.
Disconnect switches shall be furnished adequately sized for the motor loads served and shall
have a minimum rating of 40 amps at 600 VAC. Strain relief cord grips shall be provided to
accommodate each pump and all float switches. In the event that any of the cord grips provided
are not used, a short piece of cord shall be inserted into the unused connectors in order to insure
the proper sealing between compartments.
In general, for two and four pump installations, the dimensions of the upper enclosure shall be
12" wide x 12" high. The lower enclosure dimensions shall be 12" wide x 7" high.
Disconnect junction boxes manufactured for installations of more than four motors shall be sized
to accommodate the actual number of disconnects and float switches required.
Disconnect junction boxes shall be provided by F.R. Mahony & Associates, Inc.
4.3 ULTRAVIOLET DISINFECTION SYSTEM
One complete ultraviolet disinfection systems, Trojan Technologies ultraviolet system model
UV3600K capable of treating 173 gpm (250,000 gpd) at 65% UVT to a level of less than 14 cfu /
100 ml. The UV Dosage rate is 50,000µW/cm2 .The disinfection system will include the
following major equipment:
• Number of Banks — 2
• Number of UV Modules per Bank - 6
• Number of UV Lamps per UV Module - 4
• Total of six (48) lamps installed.
• 4" ANSI connection flanges for inlet/outlet
• One (1) UV -intensity monitor and control system
• Unit shall supply a lamp failure indicator to the telemetry panel.
• Electrical control and power cabling between the electrical enclosure and the UV lamp modules
(Note: Field termination is the responsibility of the contractor)
4.4 FLOW METERS are covered under separate specification.
4.5 SUMMARY
All reactor operations are controlled from the main control panel (MCP). There are two (2)
modes of operations: automatic and manual.
All automatic reactor backwash operations are controlled. Operator functions are performed
through the hardwired circuit. Amphidrome® backwashing and system discharge are performed
automatically at preset time intervals, which are operator adjustable. The manufacturer shall set
the timing.
Each motor shall be capable of being operated from the main control panel through automatic
and manual modes.
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5.0 DESIGN CRITERIA AND DATA
Influent Characteristics:
Flow
= 49,950 gpd
BOD total, mg/1
= 157
TKN, mg/l
= 85
Ammonium as N, mg/L
= 70
TSS, mg/l
= 193
PH, SU
= 7.0
Alkalinity
= 200
Phosphate as P, mg/l
= 9.1
Min. temp., deg. C.
= 11.0
Required Effluent:
BOD5
TSS
Fecal Coliform
Total Nitrogen
Total Phosphorous
Flow
< 10 mg/L
< 15 mg/L
< 14 per 100 ml
< 4 mg/L
< 2 mg/L
49,950 gpd
6.0 PROCESS PERFORMANCE
The Amphidrome® system shall be designed to produce an effluent that meets the design basis
as indicated in Design Criteria and Data. A process warranty shall be provided which guarantees
the effluent quality requirements of this specification will be met or exceeded for not less than the first 24
months of active flow.
7.0 INSTALLATION
Installation by the purchasing contractor shall be in strict accordance with the Amphidrome®
process system manufacturer's instruction and recommendations. Prior to media installation, the
under drain installation shall be inspected by the system manufacturer. Construction oversight is
the responsibility of the Owner's licensed engineer. Observation of the installation of both the
gravel and the media, along with validation that the final elevations are correct. A final set of as
built plans should be provided to Owner.
8.0 INSPECTION AND TESTING
The Amphidrome® process system manufacturer shall furnish the services of a competent and
experienced (not less than two (2) full years) factory -trained representative who has complete
knowledge of proper operation and maintenance of the equipment. The representative shall be in
attendance, to provide instructions to the plant operating personnel, to assist in plant start-up, to
be present during the clear water test with the North Carolina Department of Environmental
Quality, and to be present during the process performance testing to the extent that assures a
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
complete and successful startup and operation of the facility as determined by the Owner's
responsible agent.
A mechanical performance test shall be performed prior to the plant being placed into service.
The design engineer, the construction supervision engineer the system suppliers designated
representative and the contractor and Currituck County's designated operator shall be present.
The installing contractor shall furnish all labor, materials and equipment required for such tests
and shall correct any deficiencies noted by repairing or replacing the defective equipment and
completing the testing.
9.0 MECHANICAL WARRANTEE
The manufacturer shall guarantee for twelve (12) months from date of start-up, not to exceed
eighteen (18) months from date of shipment, that the equipment furnished will be free from
defects in design, material and workmanship. Warranties and guarantees of the suppliers of
various components in lieu of a single source responsibility by the manufacturer will not be
acceptable.
In the event a component fails to perform as specified or is proven defective in service during the
guarantee period, the manufacturer shall repair or replace, at its engineer's discretion, upon
return of such defective part to the systems supplier. The repair or replacement of those items
normally consumed in service, such as seals, grease, etc., shall be considered as part of routine
maintenance and upkeep.
10.0 SHOP DRAWINGS, INSTALLATION INSTRUCTIONS AND O& M MANUALS
Six (6) copies of each shop drawing and/or submittal shall be submitted to the design engineer
for review and approval of all materials, equipment, furnishings and other items incorporated in
the work.
Installation and start-up manuals shall be furnished for all new equipment items installed as part
of this project. A total of four (4) copies shall be provided: one (1) copy shall be with the
equipment when shipped, one (1) copy shall be sent directly to the office of the purchasing
contractors and two (2) copies shall be sent directly to the design engineer.
Six (6) copies of operations and maintenance manuals shall be furnished for all new equipment
items as part of this project. One (1) copy shall be with the equipment item when shipped and
the remaining five (5) shall be sent directly to the design engineer. Installation and start-up
manuals cannot be substituted as operations and maintenance manuals.
END OF SECTION
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SECTION 43 32 63
ULTRAVIOLET STERILIZERS
PART 1 GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specifications, apply to this Section.
f�►�YK� ' � �]�L�1�17'�
A. Furnish all labor, materials, equipment and appurtenances required to provide an open
channel, gravity flow, low pressure high intensity ultraviolet lamp (UV) disinfection
system complete with stainless steel channel and inlet and outlet transition boxes. The
UV system to be complete and operational with all control equipment and
accessories as shown and specified herein. This system will be capable of disinfecting
effluent to meet the water quality standards listed in this section.
1.3 SYSTEM DESCRIPTION
A. The UV system shall be supplied with all stainless steel channel and transition boxes
with the sizes as shown on the plans.
B. System Configuration
1. The UV system configuration will be as follows:
a. Number of Banks: 2
b. Number of UV Modules per Bank: 6
C. Number of Lamps per UV Module: 4
d. Total Number of Lamps in the UV System: 48
e. Number of System Control Centers: 1
2. Number of Power Distribution Receptacles: 12
3. Lamp array configuration:
a. The lamp array configuration shall be four bulbs placed parallel one
above the other in a single UV module. Six UV modules are to be placed
side by side. Two banks shall be placed in series. All lamps shall be
parallel to each other and to the effluent flow.
4. Lamp Life: 12,000 hrs
1.4 DESIGN REQUIREMENTS
A. Provide equipment that will disinfect effluent with the following characteristics:
1. Average Flow: 99,900 GPD
2. Pump Rate through Chamber: 173 GPM
3. TSS: < 15.0 mg/L or less
4. Effluent Temp Range: 34 F to 96 F
5. Ultraviolet Transmittance: 65% at 253.7 nm through 1 cm
6. Effluent Standards to be achieved:
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
a. 14 cfu/100ml based upon a 30 day geometric mean of daily samples for
the effluent standard as specified in 1. through 6. Effluent standards
will be guaranteed regardless of influent count to UV system.
1.5 REPLACEMENT PARTS REQUIRED
A. Contract shall provide the following replacement parts prior to the start up of the unit:
1. Spare Bulbs - Qty (24)
2. Quartz Sleeves - Qty (24)
3. Ballasts - As required for replacement of all ballasts in the UV unit.
4. Compression Nuts and O-Rings for a complete rebuild.
5. Lamp Harness - Qty (1)
6. Lamp Failure Sensor - Qty (1)
7. Operator Kit including face shield, gloves and cleaning solution - Qty (2)
1.6 PERFORMANCE GUARANTEE
A. The manufacturer shall guarantee that the UV disinfection system will meet the required
e-Coli limits as stated in Part 1.4. These limits must be met regardless of the influent e-
Coli concentration, as long as the design parameters for pump flow rate, suspended solids
and UVT as listed in Part 1.4 are not exceeded. Manufacturers of equipment whose
guarantee is limited to a maximum influent fecal coliform concentration will not be
allowed.
1.7 SUBMITTALS
A. Shop Drawings shall be submitted in accordance with Section 0133 00 - Submittal
Procedures.
B. Operation and maintenance manuals shall be submitted in accordance with Section 01 33
00 - Submittal Procedures.
C. Submittal shall include a complete description of the unit in sufficient detail to permit an
item comparison with these specifications.
D. Electrical schematics and layouts.
E. Submit written lamp warranty.
F. Submit disinfection performance guarantee.
1.8 QUALITY ASSURANCE
A. Manufacturer Qualifications
1. Provide equipment which is a standard product of the manufacturer.
1.9 WARRANTY
A. Equipment:
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
The equipment furnished under this section will be free of defects in
material and workmanship, including damages that may be incurred during
shipping for a period of 12 months from date of start-up or 18 months after
shipment, whichever comes first.
B. UV Lamps
1. The UV lamps shall be warranted for a minimum of 12,000 hours when operated
in the condition as described and shown in the Contract Document and Contract
Specifications.
PART 2 PRODUCTS
2.1 MANUFACTURER:
A. Trojan or approved equal.
2.2 MODELS:
A. UV Disinfecting Unit w/ Control Unit
1. TrojanUV3000PTP Series or approved equal.
2.3 GENERAL REQUIREMENTS
A. Provide a UV disinfection system complete with UV lamp modules as shown on the
Contract Drawings and as herein specified.
2.4 MATERIALS
A. General:
1. All material in contact with effluent shall be 316 stainless steel or quartz.
2. All wiring exposed to UV light shall be Teflon coated.
3. All material exposed to UV light shall be stainless steel, anodized aluminum,
quartz 214, or Teflon.
B. UV Module (UVM)
1.
Each UV lamp module shall consist of 6 lamps and their corresponding
electronic ballast.
2.
Each lamp shall be enclosed in its individual quartz sleeve, one end of
which shall be closed and the other end sealed by a lamp end seal and holder.
3.
The electrical wires connecting the lamps and electronic ballasts shall be
enclosed in the stainless steel frame and not exposed to the effluent.
4.
The ballasts shall be of the low-pressure electronic type, and shall be of a
style having been used for a period of at least five (5) years at Wastewater
Treatment facilities similar to that described herein. NO deviations will be
allowed.
5.
Lamp Voltage shall be 120V single phase 60 Hz
C. UV Lamps
1. 90% of UV output shall be within the wavelengths of 233.7 to 273.7 nm.
2. Shall be rated to produce a zero level of Ozone.
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
The operating life of the lamp shall be guaranteed for a period of 12,000 hours by
the UV system manufacturer. Pro -rated warranties will not be allowed.
D. UV Lamp Sleeves
1. Type 214 clear fused quartz circular tubing as manufactured by General Electric
or equal.
2. Rated for UV transmission of 90.8% and shall not be subject to solarization.
3. The nominal wall thickness shall be 1.0 to 2.0 mm.
E. Effluent Chamber
1. The UV system shall be provided with a stainless steel 316L effluent
chamber complete with drain, UV module support rack.
F. Control/Power Module
1. Maximum distance from electrical supply to UV Chamber: 20 feet.
2. Systems which employ devices such as transformers, whose failure will result in
the loss of power to the lamps will NOT be allowed.
3. Controls: Shall be housed in a NEMA 12 enclosure, and shall contain
components for the following items:
a. LED's
1) UV On
2) Warnings
3) Power On
4) Alarms
b. UV Meter displaying 0-100% UV intensity
C. Run Time Meter - Power Based
4. Output Contacts shall be provided to transmit the followings information to a
remote location:
a. Operating status ("on" or "off');
b. UV Intensity (4-20 mA signal returned to PLC)
C. UV Failure - dry contacts - lamp intensity falls below 65%
d. UV Lamp Failure - dry contacts - any bulb
5. Input Contacts shall be provided to allow the following input commands:
a. Remote ON/OFF
b. Clear Message
G. Operator's Kit
1. One (2) face shield to protect Operator from UV Light
2. One (2) gallon of ECOLAB "Lime -A -Way" cleaning solution.
PART 3 EXECUTION
3.1 INSTALLATION
A. Install in accordance with manufacturer's recommendations, Contract Drawings, Contract
Specifications and approved Shop Drawings.
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COURTHOUSE AREA WASTEWATER TREATMENT PLANT — CAMDEN COUNTY
3.2 FIELD QUALITY CONTROL
A. As required for complete and proper installation and start-up of the equipment and
training of the plant's operating personnel.
B. Operator Training: One (1) full day on -site and on call status for questions during
warranty period.
C. Warranty: One year from date of start up of unit.
END OF SECTION
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