NC0066516_Engineer Certification_20180522

Town of Fuquay-Varina
Terrible Creek WWTP
Authorization to Construct No. 066516A03
Issued February 5, 2016
Engineer's Certification
as a duly registered Professional Engineer in
the State of North Carolina, having been authorized to observe (eriodicaIl /weekly/full time) the
construction of the modifications and improvements to the 'I'errib a reek astewater Treatment
Plant, located in Wake County, hereby state that, to the best of my abilities, due care and diligence
was used in the observation of the following construction:
Demolition of existing influent wet wells, existing clarifiers # 1, #2, #3, existing tertiary
filters #1, #2, #3, existing blowers, existing chemical storage facility, existing post aeration
basin, existing UV disinfection system, and other surplus components; refurbishment of
existing treatment plant #1 and 42 basins to two (2) 0.383 MG EQ basins, piping, and
controls; refurbishment of treatment plant #3 basin to one (1) 0.682 MG EQ basin, piping,
and controls; installation of new influent pump station with 18 MGD peak hourly mechanical
and manual coarse screen system and incline conveyor, consisting of four (4) submersible
1,565 GPM at 58 ft TDH pumps with VFD, two (2) submersible 781 GPM at 58 ft TDH
pumps with VFD, influent composite sampler, piping, and controls; Installation of new
preliminary treatment facility consisting of two (2) 4.5 MGD peak hourly mechanical step
fine screens systems, a manual screen channel, two (2) 4.5 MGFD peak hourly grit removal
systems with cyclone/classifier and screening compactor, a manual grit bypass channel, three
(3) 300 GPM at 55 ft TDH grit pumps, piping, and controls; installation of new BNR
tanks/secondary clarifier splitter box with drop leg air diffusers (both sides) and ALS
addition diffusers (clarifier side), piping, and controls; installation of two (2) new five stage
(zones) 2.25 MG BNR tanks with fine air bubble diffuser array, zone 1 has one (1)
mechanical mixer and influent sump, zone 2 has four (4) mechanical mixers and drain sump,
zone 3 has one submersible (1) 6,250 GPM at 1 ft TDH NRYC pump with VFD and drain
sump, zone 4 has two (2) mechanical mixers and SCS addition diffusers, zone 5 has drain
sump and effluent outlet, piping, and controls; installation of two (2) new 85 ft diameter
clarifiers with 200 GPM at 28 TDH scum pumps, piping, and controls; installation of new
RAS/WAS pump station consisting of three (3) 1,389 GPM at 28 ft TDH pumps with VFD,
piping, and controls; installation of four (4) new blowers with VFD, 2 blowers each 1,410
SUM at 15 psig maximum and 2 blowers each 1,100 SCFM at 15 psig maximum, piping,
and controls; installation of two (2) new 309 ft2 tertiary disk filters systems with each filter
system peak flow rated at 4.5 MGD and consisting of internal backwash pump system and
wash system, multiple disks, piping, and controls; installation of new dual channel UV
system with UV intensity and lamp monitoring and automatic lamp sleeve cleaning, system
rated for disinfection of 9.0 MGD to meet NPDES fecal coliform limits per North Carolina
minimum UV design criterion, 3 banks in series per channel, 8 lamps per bank, with one
bank per channel designated as stand by, and other controls; installation of new post aeration
weir channels, effluent composite sampler, piping, and controls: installation of new internal
UW pump system consisting of sump, 250 gallon hydropneumatic tank, four (4) 130 GPM
at 200 ft TDH pumps, piping, and controls; installation of one (1) new 0.4 MG Sludge

Terrible Creek WWTP
Authorization to Construct No. 066516A03
Issued February 5, 2016
Storage tank with fine air bubble diffuser array, piping, and controls; installation of new
sludge dewatering and truck loadout system consisting of two (2) 400 GPM at 70 TDH
Dewatering Sludge Feed pumps, two (2) adjustable polymer addition and mixer systems
design for maximum 1,500 GPH of 2% polymer solution, two (2) integrated independent
gravity belt thickener with sludge hopper and screw conveyor and continuous belt filter press
, two (2) 100 GPM at 115 ft TDH TWAS pumps, three (3) in series dewatered sludge screw
conveyors designed for maximum 24,000 lbs/hr, contained truck loading area, piping, and
controls; installation of new chemical storage area and chemical feed systems with
containment for each chemical tank system and for the corresponding truck unloading area,
consisting of one (1) 5,000 gallon ALS tank with three (3) 111 GPH at 30 psig adjustable
chemical feed pumps and contaimnent sump with pump, one (1) 13,000 gallon caustic
storage tank with water dilution meter and two (2) 110 GPM at 20 TDH circulation/mixing
pumps and two (2) 111 GPH at 30 psig adjustable chemical feed pumps and containment
sump with pump, one (1) 7,300 gallon SCS tank with three (3)111 GPH at 30 psig adjustable
chemical feed pumps and containment sump with pump, piping, and controls; installation of
one (1) diesel driven 1,000 KW, 480 vac, 3 phase standby generator system with 24 hr
capacity fuel tank, and controls; in conformity with the project plans, specifications, and
other supporting data subsequently filed and approved by the Department of Environmental
Quality.
Upon completion of construction and submittal of this Engineering Certificate the facility is
confirming its expansion to 3.0 MGD and will be subject to NPDES permit requirements for
3.0 MGD.
I certify that the construction of the above referenced project was observed to be built within
substantial compliance, intent and in conformity with all applicable regulations and statutes and
the project plans, specifications, and other supporting documentation comprising the Authorization
to Construct Permit Application package.
Signature Registration No.
Date 57 z Z / I k
Mail this Certification to: Attn: -Ren4gtm, f3 -, y9 Q oA
Complex Permitting Unit
DEQ/DWR/Water Quality Programs
1617 Mail Service Center
Raleigh, NC 27699-1617
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