NC0047384_Application (ATC)_20180104

CDM
Smith
5400 Glenwood Avenue, Suite 400
Raleigh, North Carolina 27612
tel: [phone]
fax: [phone]
February 2, 2018
Mr. Trupti Desai
North Carolina Department of Environmental Quality
Division of Water Resources/NPDES Unit
512 N. Salisbury Street, 9th Floor
Raleigh, North Carolina 27604
Subject: City of Greensboro
T.Z. Osborne WRF Ash Clarifier Improvements
Authorization to Construct Application
Dear Mr. Desai:
The City of Greensboro (City) proposes to construct a new ash clarifier and pumping
facility to replace the facilities at the T.Z. Osborne Water Reclamation Facility (NPDES
number NC0047384). The existing ash clarifier and thickened ash slurry pump station
are reaching the end of their useful life, and the proposed work will improve the
reliability of the ash thickening facilities.
The proposed ash clarifier will treat discharges from the existing biosolids incinerators/
quencher/scrubbers and the ash dewatering equipment located in the solids handling
building. Thickened underflow from the clarifier will be pumped to the existing rotary
press type ash dewatering equipment, or to a new belt filter press being designed (by
others).
On behalf of the City, we request an Authorization to Construct for the work described in
the enclosed application for Authorization to Construct approval.
The construction timeline for the implementation of the project is summarized below:
Spring 2018 - anticipated bidding
Summer 2018 - anticipated notice to proceed for construction contractor
Summer 2019 - anticipated completion of construction
The following attachments are included as part of this application:
• Application for Authorization to Construct Form (Section 1)
0
WATER + ENVIRONMENT +TRANSPORTATION + ENERGY + FACILITIES

Smith
Mr. Trupti Desai
February 2, 2018
Page 2
• Copy of NPDES Permit (Section 2)
• Engineering Calculations (Section 3)
• Residuals Management Plan (Section 4)
• Bid Form (Section 5)
• CD with digital files
• Engineering Plans and Specifications
Please review the application and let me know if you have any questions. Thank you for
your assistance.
Sincerely,
James Butcher, P.E.
CDM Smith Inc.
Enclosures: ATC Form and attachments including calculations and CD with digital files
One set plans and specifications
cc: Monica Jarrett, City of Greensboro
0
Ash Clarifier ATC cover letter.docx

City of Greensboro
T.Z. Osborne WRF Ash Clarifier Improvements
Application for Authorization to Construct Permit
Contents
Cover Letter
Section is Application Form (Form ATC -12-14)
Section a: NPDES Permit (Section 3, Item B of application)
Section 3: Engineering Calculations (Section 3, Item H of
application)
Section 4: Residuals Management Plan (Section 3, Item J of
application)
Section 5: Bid Form (Section 3, Item F of application)
Pocket: CD with Digital Files
Included separately: Plans and Specifications

State of North Carolina
Department of Environmental Quality
Division of Water Resources
Water Resources
LNVIRONMENTAL OUALI I Y APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
SECTION 1: INSTRUCTIONS AND INFORMATION
A. The Division of Water Resources will accept this application package for review only if all of the items are provided and the
application is complete. Failure to submit all of the required items will result in the application package being returned as incomplete
per 15A NCAC 02T .0105(b).
B. Plans and specifications must be prepared in accordance with 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina General Statute
133-3, North Carolina General Statute 143-215.1, and Division of Water Resources Minimum Design Criteria for NPDES
Wastewater Treatment Facilities.
C. The plans and specifications submitted must represent a completed final design that is ready to advertise for bid.
D. Any content changes made to this Form ATC -12-14 shall result in the application package being returned.
E. The Applicant shall submit ONE ORIGINAL and ONE DIGITAL COPY (CD) of the application, all supporting documentation and
attachments. All information must be submitted bound or in a 3 -ring binder, with a Section tab for each Section, except the
Engineering Plans.
F. Check the boxes below to indicate that the information is provided and the requirements are met.
G. If attachments are necessary for clarity or due to space limitations, such attachments are considered part of the application
package and must be numbered to correspond to the item referenced.
H. For any project that requires review under the State Environmental Policy Act (SEPA), an Authorization to Construct cannot be
issued prior to the completion of a State Clearinghouse advertisement period for a FONSI, EIS, etc. unless the project qualifies for
a Determination of Minor Construction Activity.
I. For more information, visit the Division of Water Resources web site at: https://deg.nc.gov/about/divisions/water-resources/water-
resources-permits/wastewater-branch/npdes-wastewater/authorization-to-construct.
J. In addition to this Authorization to Construct, the Applicant should be aware that other permits may be required from other Sections
of the Division of Water Resources (for example: reclaimed water facilities permits; Class A or B biosolids residuals permit).
SECTION 2: APPLICANT INFORMATION AND PROJECT DESCRIPTION
A. APPLICANT
Applicant's name
City of Greensboro
Signature authority's name per 15A NCAC 02T .0106(b)
Steven D. Drew
Signature authority's title
Director, Water Resources Department
Complete mailing address
2602 South Elm -Eugene Street, Greensboro, NC 27406
Telephone number
[phone]
Email address
[e-mail]
B. PROFESSIONAL ENGINEER
Professional Engineer's name
James Butcher, P.E.
Professional Engineer's title
Senior Project Manager
North Carolina Professional Engineer's License No.
033669
Firm name
CDM Smith
Firm License number
F-1255
Complete mailing address
5400 Glenwood Avenue, Suite 400, Raleigh NC 27612
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 1

Water Resources
ENVIRONMENTAL OUALIIY
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
Telephone number 919-325-3500
Email address [e-mail]
C. NPDES PERMIT
NPDES Permit number
NCO047384
Current Permitted flow (MGD) — include permit
flow phases if applicable
40 MGD
D. PROJECT DESCRIPTION
Provide a brief description of the project: The City of Greensboro owns and operates the T. Z. Osborne (TZO) Water Reclamation
Facility (WRF). The City disposes of all residual solids produced at the TZO WRF by thickening, dewatering, and incineration. Two
fluidized bed incinerators are used to incinerate the sludge. Water is used to scrub ash particles from the off -gas prior to
discharge into the atmosphere. The ash slurry produced by the scrubbing process is recovered using an ash clarifier. The existing
ash clarifier and thickened ash slurry pump station are reaching the end of their useful life. In order to improve the reliability of
the ash thickening facilities, the City proposes to construct a new clarifier and pumping facilities to replace the old facilities.
The proposed ash clarifier will treat discharges from the existing FBI No. 1 and No. 2 quencher/scrubbers and the ash
dewatering equipment located in the solids handling building. Thickened underflow from the clarifier will be pumped to the
existing rotary press type ash dewatering equipment, or to a new belt filter press currently being designed (by others).
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A. Cover Letter
® The letter must include a request for the Authorization to Construct; the facility NPDES Number; a brief project description
that indicates whether the project is a new facility, facility modification, treatment process modification, or facility expansion;
the construction timeline; and a list of all items and attachments included in the application package.
❑ If any of the requirements of 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina General Statute 133-3, North Carolina
General Statute 143-215.1, and Division of Water Resources Minimum Design Criteria for NPDES Wastewater Treatment
Facilities are not met by the proposed design, the letter must include an itemized list of the requirements that are not met.
B. NPDES Permit
® Submit Part I of the Final NPDES permit for this facility that includes Part A (Effluent Limitations and Monitoring Requirements)
for the monthly average flow limit that corresponds to the work that is requested for this project.
C. Special Order by Consent
❑ If the facility is subject to any Special Orders by Consent (SOC), submit the applicable SOC.
® Not Applicable.
D. Finding of No Significant Impact or Record of Decision
❑ Submit a copy of the Finding of No Significant Impact or Record of Decision for this project.
❑ Provide a brief description of any of the mitigating factors or activities included in the approved Environmental Document
that impact any aspect of design of this project, if not specified in the Finding of No Significant Impact or Record of Decision.
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 2

State of North Carolina
Department of Environmental Quality
Division of Water Resources
Water Resources
ENVIRONMENTAL OUALI I Y APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
® Not Applicable.
E. Engineering Plans
® Per 15A NCAC 02T .0504(c)(1), submit one set of detailed plans that have been signed, sealed and dated by a North Carolina
Licensed Professional Engineer.
® Per 21 NCAC 56 .1103(a)(6), the name, address and License number of the Licensee's firm shall be included on each sheet of
the engineering drawings.
® Plans must be labeled as follows: FINAL DRAWING — FOR REVIEW PURPOSES ONLY— NOT RELEASED FOR CONSTRUCTION.
® 15A NCAC 02H .0124 requires multiple (dual at a minimum) components such as pumps, chemical feed systems, aeration
equipment and disinfection equipment. Is this requirement met by the design? ® Yes or ❑ No. If no, provide an
explanation:
Plans shall include:
® Plans for all applicable disciplines needed for bidding and construction of the proposed project (check as appropriate):
® Civil ❑ Not Applicable
® Process Mechanical ❑ Not Applicable
® Structural ❑ Not Applicable
® Electrical ❑ Not Applicable
® Instrumentation/Controls ❑ Not Applicable
❑ Architectural ® Not Applicable
❑ Building Mechanical ® Not Applicable
❑ Building Plumbing ® Not Applicable
® Plan and profile views and associated details of all modified treatment units including piping, valves, and equipment (pumps,
blowers, mixers, diffusers, etc.)
® Are any modifications proposed that impact the hydraulic profile of the treatment facility? ❑ Yes or ® No. If yes, provide
a hydraulic profile drawing on one sheet that includes all impacted upstream and downstream units. The profile shall include
the top of wall elevations of each impacted treatment unit and the water surface elevations within each impacted treatment
unit for two flow conditions: (1) the NPDES permitted flow with all trains in service and (2) the peak hourly flow with one
treatment train removed from service.
® Are any modifications proposed that impact the process flow diagram or process flow schematic of the treatment facility?
❑ Yes or ® No. If yes, provide the process flow diagram or process flow schematic showing all modified flow paths including
aeration, recycle/return, wasting, and chemical feed, with the location of all monitoring and control instruments noted.
F. ® Engineering Specifications
® Per 15A NCAC 02T .0504(c)(2), submit one set of specifications that have been signed, sealed and dated by a North Carolina
Licensed Professional Engineer.
® Specifications must be labeled as follows: FINAL SPECIFICATIONS — FOR REVIEW PURPOSES ONLY — NOT RELEASED FOR
CONSTRUCTION.
Specifications shall include:
® Specifications for all applicable disciplines needed for bidding and construction of the proposed project (check as
appropriate):
❑ Not Applicable
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 3

State of North Carolina
Department of Environmental Quality
Division of Water Resources
Water Resources
ENVIRONMENTAL ouALl I Y APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
®
Process Mechanical
❑ Not Applicable
®
Structural
❑ Not Applicable
®
Electrical
❑ Not Applicable
®
Instrumentation/Controls
❑ Not Applicable
❑
Architectural
® Not Applicable
❑
Building Mechanical
® Not Applicable
❑
Building Plumbing
® Not Applicable
® Detailed specifications for all treatment units and processes including piping, valves, equipment (pumps, blowers, mixers,
diffusers, etc.), and instrumentation.
® Means of ensuring quality and integrity of the finished product including leakage testing requirements for structures and
pipelines, and performance testing requirements for equipment.
® Bid Form for publicly bid projects.
G. Construction Sequence Plan
® Construction Sequence Plan such that construction activities will not result in overflows or bypasses to waters of the State.
The Plan must not imply that the Contractor is responsible for operation of treatment facilities. List the location of the
Construction Sequence Plan as in the Engineering Plans or in the Engineering Specifications or in both: Construction Sequence
is included in Specifications, Division 01, Section 0112 16.
H. Engineering Calculations
® Per 15A NCAC 02T .0504(c)(3), submit one set of engineering calculations that have been signed, sealed and dated by a North
Carolina Licensed Professional Engineer; the seal, signature and date shall be placed on the cover sheet of the calculations.
For new or expanding facilities and for treatment process modifications that are included in Section 4.C, the calculations shall
include at a minimum:
❑ Demonstration of how peak hour design flow was determined with a justification of the selected peaking factor.
❑ Influent pollutant loading demonstrating how the design influent characteristics in Section 4.13.2 of this form were
determined.
❑ Pollutant loading for each treatment unit demonstrating how the design effluent concentrations in Section 4.6.2 of this form
were determined.
❑ Hydraulic loading for each treatment unit.
❑ Sizing criteria for each treatment unit and associated equipment (blowers, mixers, pumps, etc.)
❑ Total dynamic head (TDH) calculations and system curve analysis for each pump specified that is included in Section 4.C.6.
❑ Buoyancy calculations for all below grade structures.
❑ Supporting documentation that the specified auxiliary power source is capable of powering all essential treatment units.
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 4

Water Resource:
ENVIRONMENTAL OUALI i r
Permits
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
® Provide the following information for each permit and/or certification required for this project:
Permit/Certification
Not
Applicable
Date
Submitted
Date
Approved
Permit/
Certification
Number
If Not Issued Provide
Status and Expected
Issuance Date
Dam Safety
X
Soil Erosion and Sediment Control
X
USCOE /Section 404 Permit
X
Water Quality Certification (401)
X
USCOE / Section 10
X
Stormwater Management Plan
X
CAMA
X
NCDOT Encroachment Agreement
X
Railroad Encroachment Agreement
X
Other: City TRC review
12/7/17
1/12/18
2017-2156
J. Residuals Management Plan
® For all new facilities, expanding facilities, or modifications that result in a change to sludge production and/or sludge
processes, provide a Residuals Management Plan meeting the requirements of 15A NCAC 02T .0504(1) and 15A NCAC 02T
.0508; the Plan must include:
❑ A detailed explanation as to how the generated residuals (including trash, sediment and grit) will be collected, handled,
processed, stored, treated, and disposed.
❑ An evaluation of the treatment facility's residuals storage requirements based upon the maximum anticipated residuals
production rate and ability to remove residuals.
❑ A permit for residuals utilization or a written commitment to the Applicant from a Permittee of a Department approved
residuals disposal/utilization program that has adequate permitted capacity to accept the residuals or has submitted a
residuals/utilization program application.
❑ If oil, grease, grit or screenings removal and collection is a designated unit process, a detailed explanation as to how the
oil/grease will be collected, handled, processed, stored and disposed.
❑ Not Applicable.
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 5

State of North Carolina
Department of Environmental Quality
Division of Water Resources
Water Resources
ENVIRONMENTAL QUALITY APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
SECTION 4: PROJECT INFORMATION
A. WASTEWATER TREATMENT PLANT FLOW INFORMATION —COMPLETE FOR NEW OR EXPANDING FACILITIES
1. Provide the following flow information:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 6
Plant Flows
Existing Plant Design
MGD
Current NPDES Permit Limit
MGD
Current Annual Average
(past 12 months)
MGD
For Past 12 Months:
Start Date: month/yr
End Date: month/yr
For Past 24 Months:
Start Date: month/yr
End Date: month/yr
Maximum Month
MGD
MGD
Maximum Day
MGD
MGD
Peak Hour
MGD
MGD
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 6

State of North Carolina
Department of Environmental Quality
Division of Water Resources
Water Resources
ENVIRONMENTAL QUALITY APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
B. WASTEWATER TREATMENT FACILITY DESIGN INFORMATION —COMPLETE FOR NEW OR EXPANDING FACILITIES AND
FOR TREATMENT PROCESS MODIFICATIONS
1. Have all of the requirements of 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina General Statute 133-3, North Carolina
General Statute 143-215.1, and Division of Water Resources Minimum Design Criteria for NPDES Wastewater Treatment
Facilities been met by the proposed design and specifications? ❑ Yes or ❑ No. If no, provide justification as to why the
requirements are not met, consistent with 15A NCAC 02T .0105(n):
2. Provide the design influent and effluent characteristics that are used as the basis for the project design, and the NPDES
permit limits for the following parameters:
3. Based on the "Project Basis of Design" parameters listed above, will the proposed design allow the treatment facility to
meet the NPDES Permit Limits listed above? ❑ Yes or ❑ No. If no, describe how and why the Permit Limits will not be
met:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 7
Project Basis of Design
Design Influent
Design Influent
Influent
Concentration
Load
Concentration -
(Must be
(Must be
Current Annual
supported by
supported by
Design Effluent
Average (past
Engineering
Engineering
Concentration and/or
NPDES Permit Limits
12 months) if
Calculations
Calculations
Load
(monthly average)
Parameter
Available
[Section 3.H])
[Section 3.H])
Ammonia Nitrogen
mg/L Summer
mg/L Summer
(NH3-N)
mg/L
mg/L
Ib/day
mg/L Winter
mg/L Winter
Biochemical
mg/L Summer
mg/L Summer
Oxygen Demand
mg/L
mg/L
Ib/day
(BODS)
mg/L Winter
mg/L Winter
Fecal Coliform
per 100 mL
per 100 mL
Nitrate + Nitrite
Nitrogen (NO3-N +
mg/L
mg/L
NO2-N)
Total Kjeldahl
mg/L
Nitrogen
mg/L
mg/L
Total Nitrogen
Ib/year
Ib/year
mg/L
mg/L
Total Phosphorus
mg/L
mg/L
Ib/day
Ib/year
Ib/year
Total Suspended
mg/L
mg/L
Ib/day
mg/L
mg/L
Solids (TSS)
3. Based on the "Project Basis of Design" parameters listed above, will the proposed design allow the treatment facility to
meet the NPDES Permit Limits listed above? ❑ Yes or ❑ No. If no, describe how and why the Permit Limits will not be
met:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 7

State of North Carolina
Department of Environmental Quality
Division of Water Resources
Water Resources
LNVIRONMENTAL OUALI I Y APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
4. Per 15A NCAC 02T .0505(1), by-pass and overflow lines are prohibited. Is this condition met by the design? ❑ Yes or ❑ No
If no, describe the treatment units bypassed, why this is necessary, and where the bypass discharges:
Per 15A NCAC 02T .0505(k), multiple pumps shall be provided wherever pumps are used. Is this condition met by the
design? ❑ Yes or ❑ No. If no, provide an explanation:
6. Per 15A NCAC 02T .0505(1), power reliability shall be provided consisting of automatically activated standby power supply
onsite capable of powering all essential treatment units under design conditions, or dual power supply shall be provided
per 15A NCAC 02H. 0124(2)(a). Is this condition met by the design? ❑ Yes or ❑ No. If no, provide (as an attachment
to this Application) written approval from the Director that the facility:
➢ Has a private water supply that automatically shuts off during power failures and does not contain elevated water
storage tanks, and
➢ Has sufficient storage capacity that no potential for overflow exists, and
➢ Can tolerate septic wastewater due to prolonged detention.
Per 15A NCAC 02T .0505(o), a minimum of 30 days of residual storage shall be provided. Is this condition met by the
design? ❑ Yes or ❑ No. If no, explain the alternative design criteria proposed for this project in accordance 15A NCAC
8. Per 15A NCAC 02T .0505(g), the public shall be prohibited from access to the wastewater treatment facilities. Explain how
the design complies with this requirement:
9. Is the treatment facility located within the 100 -year flood plain? ❑ Yes or ❑ No. If yes, describe how the facility is
protected from the 100 -year flood:
C. WASTEWATER TREATMENT UNIT AND MECHANICAL EQUIPMENT INFORMATION —COMPLETE FOR NEW OR
EXPANDING FACILITIES AND FOR MODIFIED TREATMENT UNITS
1. PRELIMINARY AND PRIMARY TREATMENT (i.e., physical removal operations and flow equalization):
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 8
Calculations
No. of
Ian heet
Specification
Treatment Unit
Type
Size per Unit
Provided?
Units
Reference
Reference
(Yes or No)
Manual Bar Screen
MGD at peak hourly flow
Mechanical Bar
MGD at peak hourly flow
Screen
Grit Removal
MGD at peak hourly flow
Flow Equalization
-
gallons
ft diameter; ft side
Primary Clarifier
Circular
water depth
square feet; ft side
Primary Clarifier
Rectangular
water depth
Other
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 8

Water Resources
ENVIRONMENTAL OUALII Y
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
SECONDARY TREATMENT (BIOLOGICAL REACTORS AND CLARIFIERS) (i.e., biological and chemical processes to remove
organics and nutrients)
3. TERTIARY TREATMENT
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided?
(Yes or No)
Aerobic Zones/
Circular
ft diameter; ft
Tanks
(Parallel; in
gallons
Anoxic Zones/
Rectangular
square feet; ft
gallons
Tanks
(Gas;
square feet
Anaerobic
tablet; liquid)
gallons
Zones/Tanks
Sequencing Batch
-
gallons
Reactor (SBR)
Membrane
gallons
Bioreactor (MBR)
-
gallons
Secondary Clarifier
Circular
ft diameter; ft
side water depth
Secondary Clarifier
Rectangular
square feet; ft
side water depth
Other
3. TERTIARY TREATMENT
4. DISINFECTION
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided?
(Yes or No)
Tertiary Clarifier
Circular
ft diameter; ft
Ultraviolet Light
(Parallel; in
side water depth
Tertiary Clarifier
Rectangular
square feet; ft
side water depth
Tertiary Filter
(Gas;
square feet
Tertiary Membrane
tablet; liquid)
square feet
Filtration
Post -Treatment
-
gallons
Flow Equalization
Post -Aeration
gallons
Other
4. DISINFECTION
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 9
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided?
(Yes or No)
gal/day per bank at
Ultraviolet Light
(Parallel; in
peak hourly flow;
series)
number of banks;
number of lamps/bank
Chlorination
(Gas;
gallons of contact
tablet; liquid)
tank/unit
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 9

Water Resources
ENVIRONMENTAL QUALITY
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
Dechlorination
No. of
(Gas;
gallons of contact
Plan Sheet
Specification
Calculations
Treatment Unit
Units
tablet; liquid)
tank/unit
Reference
Reference
Provided?
S. RESIDUALS TREATMENT
6. PUMP SYSTEMS (include influent, intermediate, effluent, major recycles, waste sludge, thickened waste sludge and plant
drain pumps)
Location
No. of
Purpose
Type
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided?
52
C-2
46 33 42,
46 33 43
(Yes or No)
Gravity Thickening
1
Ash Clarifier
935 square feet; 10.5 ft side
M-2, M-3
46 43 01
Yes
Tank
water depth
Mechanical
Thickening/
dry Ib/hour
Dewatering
Aerobic Digestion
gallons
Anaerobic
gallons
Digestion
Composting
dry Ib/hour
Drying
dry Ib/hour
Other
6. PUMP SYSTEMS (include influent, intermediate, effluent, major recycles, waste sludge, thickened waste sludge and plant
drain pumps)
Location
No. of
Pumps
Purpose
Type
Capacity of
each pump
plan Sheet
Reference
Specification
Reference
GPM
I TDH
Ash Pump Station
1
Pump thickened ash
to dewatering press
Double Disc
75
52
C-2
46 33 42,
46 33 43
7. MIXERS
Location
No. of
Mixers
Purpose
Type
Power of
each MP ixer
plan Sheet
Reference
Specification
Reference
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 10

Water Resources
ENVIRONMENTAL QUALITY
8. BLOWERS
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
Location
No. of
Blowers
purpose
Type
Capacity of
each Blower
(CFM)
plan Sheet
Reference
Specification
Reference
Treatment/Storage
Design? If "No", identify
Unit
Setback Waivers in Item D.2
Below
Any habitable residence or place of assembly under separate
100 ft
® Yes
❑ No
ownership or not to be maintained as part of the project site
Any private or public water supply source
100 ft
® Yes
❑ No
Surface waters (streams — intermittent and perennial, perennial
50 ft
® Yes
❑ No
waterbodies, and wetlands)
Any well with exception of monitoring wells
100 ft
® Yes
❑ No
Any property line
50 ft
® Yes
9. ODOR CONTROL
Location
No. of
Units
Purpose
Type
Plan Sheet
Reference
Specification
Reference
Setback Parameter
Treatment/Storage
Design? If "No", identify
Unit
Setback Waivers in Item D.2
Below
Any habitable residence or place of assembly under separate
100 ft
® Yes
❑ No
ownership or not to be maintained as part of the project site
Any private or public water supply source
D. SETBACKS —COMPLETE FOR NEW WASTEWATER TREATMENT STRUCTURES
The minimum distance for each setback parameter to the wastewater treatment/storage units per 15A NCAC 02T .0506(b
are as follows:
Have any setback waivers been obtained per 15A NCAC 02T .0506(d)? ❑ Yes or ® No. If yes, have these waivers been
written, notarized and signed by all parties involved and recorded with the County Register of Deeds? ❑ Yes or ❑ No. If
no, provide an explanation:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 11
Minimum Distance
Is Minimum Distance
Required from Nearest
Requirement met by the
Setback Parameter
Treatment/Storage
Design? If "No", identify
Unit
Setback Waivers in Item D.2
Below
Any habitable residence or place of assembly under separate
100 ft
® Yes
❑ No
ownership or not to be maintained as part of the project site
Any private or public water supply source
100 ft
® Yes
❑ No
Surface waters (streams — intermittent and perennial, perennial
50 ft
® Yes
❑ No
waterbodies, and wetlands)
Any well with exception of monitoring wells
100 ft
® Yes
❑ No
Any property line
50 ft
® Yes
❑ No
Have any setback waivers been obtained per 15A NCAC 02T .0506(d)? ❑ Yes or ® No. If yes, have these waivers been
written, notarized and signed by all parties involved and recorded with the County Register of Deeds? ❑ Yes or ❑ No. If
no, provide an explanation:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 11

State of North Carolina
K- Department of Environmental Quality
Division of Water Resources
Water Resources
ENVIRONMENTAL QUALITY APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
SECTION 5: APPLICATION CERTIFICATION BY PROFESSIONAL ENGINEER
Professional Engineer's Certification per 15A NCAC 02T.0105:
I, lames Butcher attest that this application package for an Authorization to Construct
(Typed Name of Professional Engineer)
for the T.Z. Osborne WRF Ash Clarifier I
(Facility and Project Name)
was prepared under my direct supervisory control and to the best of my knowledge is accurate, complete and consistent
with the information supplied in the engineering plans, specifications, calculations, and all other supporting
documentation for this project. I further attest that to the best of my knowledge the proposed design has been
prepared in accordance with all applicable regulations and statutes, 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina
General Statute 133-3, North Carolina General Statute 143-215.1, and Division of Water Resources Minimum Design
Criteria for NPDES Wastewater Treatment Facilities, and this Authorization to Construct Permit Application, except as
provided for and explained in Section 4.6.1 of this Application. I understand that the Division of Water Resources'
issuance of the Authorization to Construct Permit may be based solely upon this Certification and that the Division may
waive the technical review of the plans, specifications, calculations and other supporting documentation provided in this
application package. I further understand that the application package may be subject to a future audit by the Division.
Although certain portions of this submittal package may have been prepared, signed and sealed by other professionals
licensed in North Carolina, inclusion of these materials under my signature and seal signifies that I have reviewed the
materials and have determined that the materials are consistent with the project design.
I understand that 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 with written signature placed over or adjacent to the seal and dated:
ae�®,oF�S S/®-''�,�'®�
oA SEAL 9r
33669
e1e1, ®NGIN oo \,
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 12

State of North Carolina
Department of Environmental Quality
Division of Water Resources
K, r10
Water Resources
ENVIRONMENTAL QUALITY APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
SECTION 6: APPLICATION CERTIFICATION BY APPLICANT
Applicant's Certification per 15A NCAC 02T .0106(b):
I, Steven D. Drew , attest that this application package for an Authorization to Construct
(Typed Name of Signature Authority and Title)
for the T Z Osborne WRF Ash Clarifier Improvements
(Facility and Project Name)
has been reviewed by me and is accurate and complete to the best of my knowledge. 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 in
accordance with 15A NCAC 02T .0120(b), the Applicant or any affiliate has not been convicted of environmental crimes,
has not abandoned a wastewater facility without proper closure, does not have an outstanding civil penalty where all
appeals have been abandoned or exhausted, are compliant with any active compliance schedule, and does not have any
overdue annual fees.
I understand that the Division of Water Resources' issuance of the Authorization to Construct Permit may be based
solely upon acceptance of the Licensed Professional Engineer's Certification contained in Section 5, and that the Division
may waive the technical review of the plans, specifications, calculations and other supporting documentation provided
in this application package. I further understand that the application package may be subject to a future audit.
I understand that in cordance with Ge eral Statutes 143-215.6A and 143-215.613 any person who knowingly makes
any false statement, r presenta ' , r c rtification in a application package shall be guilty of a Class 2 misdemeanor,
which may include not exc d $ 0,000, as as civil penalties up to $25,000 per violation.
Signature:J"-\: l
Date: � � ` -.i�
THE COMPLETED APPLICATION AND SUPPORTING INFORMATION SHALL BE SUBMITTED TO:
NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES/NPDES
By U.S. Postal Service By Courier/Special Delivery:
1617 MAIL SERVICE CENTER 512 N. SALISBURY STREET, 9TH FLOOR
RALEIGH, NORTH CAROLINA 27699-1617 RALEIGH, NORTH CAROLINA 27604
TELEPHONE NUMBER: [phone]
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 13

City of Greensboro
T.Z. Osborne WRF Ash Clarifier Improvements
Section 3
Calculations

City of Greensboro
T.Z. Osborne WRF Ash Clarifier Improvements
Process/Mechanical Calculations
1. Ash Clarifier Sizing
2. Ash Clarifier Pump Station
�4k; SEAL �� o
0 33661
cNGINE�'
ii�FS �M. , 9V\G��2 2 I
I

CDMCLIENT
City of Greensboro
JOB NO.
6145-217155 DATE 12/13/17
Sm _ th
PROJECT Ash Clarifier
PR
Improvements
DATE
CHECKED
COMPUTED
1/18/18 BY Satej Kulkarni
DETAIL Cover Sheet
CHECKED
CSF
BY
Pump Performance -System Analysis Calculations for
T.Z. Osborne WRF
Ash Clarifier Pump Station
Station Description:
The station comprises 1 positive displacement pump that pump ash from the clarifier to the new belt filter press.
1.0 Contents
1 Cover
2 Equations
3 System Data
4 Pump Data
4A Pump and System Curves
5 Hydraulic Model Schematic
6 Hydaulic Model - Component:
7 Hydraulic Model - Pipe Tabl(
1.1 Purpose/Objective:
1. Design an ash clarifier PS that will be operated over a flow range of 15 to 75 gpm
This calculation will show the pump capability to meet the design requirement:
1.2 Procedure/Approach:
1. Enter pump performance data (flow, head, efficiency, and NSPR
2. Enter system hydraulic information for each scenario (Sheet 3
3. Select pumps operating to develop curve plo
4. Review pump -system curve (Sheet 5.6;
1.3 Data and References:
1. Hydraulic Institute Engineering Data Book Second Edition: 77-78. Hydraulic Institute 199
2. Cameron Hydraulic Data: 3-1 to 3-122. Flowserve Corporation 2002
3. Ash Clarifier Pump Station WaterGEMS V8i mode
4. Design Drawings
1.4 Assumptions
and Limitations:
The minimum C -factor assumed for CPVC Pipe is 10C
1.5 Legend:
The following text and cell color codes are used in this spreadsheet and indicate the followint
blue shaded cell = value that requires manual inpu
text black text = notes, equations, and results that do not need updating for typical calculation
<<--text green text with arrow = notes, assumptions, or references to data sources

CDMCLIENT
City of Greensboro JOB No. 6145-217155
DATE 12/13/17
Smith
Ash Clarifier COMPUTED
PROJECT DATE CHECKED 1/18/18
Improvements
BY Satej Kulkarni
DETAIL Equations CHECKED BY CSF
2.0 Equations
This sheet summarizes the key equations used in this calculation brief
1. Flow at reduced speed is calculated according to the affinity law for flow:
Q 1 _ n i
Q 2 n 2
Where:
Q,= Full speed flow (gpm)
Q2= Reduced speed flow (gpm)
n,= Full speed (rpm)
nZ= Reduced speed (rpm)
2. Head at reduced speed is calculated according to the affinity law for head:
Hi (n,
H2 — n2 J2
Where:
H,= Full speed head (ft)
HZ= Reduced speed head (ft)
n,= Full speed (rpm)
nZ= Reduced speed (rpm)
75
75

CLIENT City of Greensboro JOB NO. 6145-217155 DATE 12/13/17
DM_ PROJECT Ash Clarifier Improvements CHECKED DATE 1/16/2018 COMPUTED Satej Kulkami
Smi t h DETAIL Pump Performance Data CHECKED CSF
3.0 Pump Data Enter the performance data for up to EIGHT pumps on this sheet.
Penn
41
7.5
) (9prn) I (ft) I Eff I (ft) )
Pump Curves as Entered Above
Ash Pump
150.0
V 100.0
a
x 50.0
0.0
0 50 100 150
Flow (gpm)
Ash Pump
150.0
r 100.0
9
x 50.0
0.0
0 50 100 150
Flow (gpm)
Ash Pump
Manf:
Penn Valley Pumps
Model:
4DDSX30
Motor:
7.5 hp
Speed:
200 rpm
Impeller:
As Req'd in
Flow
(gpm)
Headr
(ft) Eff (ft)
35
140.0
40
120.0
45
100.0
47
95.0
52
80.0
60
60.0
65
50.0
70
40.0
84
20.0
98
0.0
Ash Pump
150.0
r 100.0
9
x 50.0
0.0
0 50 100 150
Flow (gpm)
Ash Pump
150.0
9100.0
9
T
= 50.0
0.0
0 50 100 150
Flow (gpm)
Ash Pump
Ash Pump
Manf:
Penn Valley Pumps
Model:
4DDSX30
Motor:
7.5 hp
Speed:
100 rpm
Impeller:
As Req'd in
Flow
(gpm)
Head r
(ft) Eff (ft)
17
140.0
20
120.0
22
1 00.0
23
95.0
25
81.0
30
60.0
32
49.5
35
40.0
42
20.0
50
0.0
Ash Pump
150.0
9100.0
9
T
= 50.0
0.0
0 50 100 150
Flow (gpm)
Ash Pump
Manf: Penn Valley Pumps
Model: 4DDSX30
Motor: 7.5 hp
Speed: 50 rpm
Impeller: As Req'd in
Flow Head
(gpm) (ft)
la%rFrr-
Eff (ft)
8.5 140.0
10 120.0
11 100.0
11.5 95.0
12.5 81.0
15 60.0
16 49.5
17.5 40.0
21 20.0
25 0.0
Ash Pump
150.0
9100.0
9
d
= 50.0
0.0
0 50 100 150
Flow (gpm)

CDMCLIENT
Smith
OJ
City of Greensboro
Ash Clarifier Improvements
System curves
JOB NO.
CHECKED
6145-217155
1/18/2018
CSF
DATE
COMPUTED
12/13/1 ]
Satel Kull
3.0 Scenario 1 System Data
This sheet presents the hydraulic data used to generale low, high, and typical system curves for the first pumping scenario.
Scenario Name:
I
Penn Valley
Pumps System Curves
EL 720.SB ft in WW SYSTEM CU RVE
EL 720.58 k at WW SYSTEM CURVE
SyslemCurve ID=
Low Head
System Curve ID=
High Head
System curve ID =
System Curve ID=
aR.
@
System Description:
From Clarifier to Effluent M (Discharge EL includes 10 psi lolB
due to nozzle)
System Description:
From clarifier to Effluent WIN (Discharge EL includes 2 psi
loss due to nozzle)
System Description:
System Description:
Model File Name:
Greensboro Ash Clarifier
Model File Name:
Greensboro Ash Clarifier
Model File Name:
Modal File Name:
E
Motlel Scenario:
Min. Head Cord.
Model Scenario:
High Head Cord.
Model Scenario:
Model Scenario:
N
Suction WSE or HGL (ft) =
720.58
Suction WSE or HGL (ft) =
720.58
Suction WSE or HGL (ft) =
Suction WSE or HGL (ft)=
T
Discharge WSE or HGL(ft)-
737
Discharge WSE or HGL (ft)
737
Discharge WSE or HGL (ft)
Discharge WSE or HGL (ft)
V%
Static Heed ft =
16.42
Static Head-
1642
Static Heed k -
0
Static Heed ft =
0
Pipe Friction Coefficient=
140
Pipe Friction Coefficient=
100
Pipe' Coefficient=
Pipe Friction Coefficient=
Flow from ..d.1 (gpm)
81
Flow from model= -
78
Flow from ..d.1 (gpm)
Flow from ..d.1 (gpm)
TDH from Model (ft) =
50.02
TDH from Model ft
54.21
TDH from Model (ft) =
TDH from Model (ft)=
Friction Head 11 -
33.6
Friction Head H =
3719
Friction Head -
0
Friction HeatlH =
0
Percent of Modeled
Flow
Flow
Head
k
Flow
Head
ft
Flow
Head
k
Flow
Head
ft
0%
0
16
0
16
0
#DIV/OI
0
#DIV/01
10%
1 8
17
8
17
0
#DIV/01
0
#DIV/01
20%
16
18
16
18
0
#DIV/01
0
#DIV/01
30%
24
20
23
20
0
#DIV/OI
0
#DIV/01
40%
32
23
31
23
0
#DIV/01
0
#DIV/01
50%
41
26
39
27
0
#DIV/01
0
#DIV/01
60%
49
29
47
31
0
#DIV/01
0
#DIV/01
70%
57
34
55
36
0
#DIV/01
0
#DIV/01
80%
65
39
62
41
0
#DIV/01
0
#DIV/01
90%
73
44
70
48
0
#DIV/01
0
#DIV/01
100%
81
50
78
54
0
#DIV/01
0
#DIV/01
120%
97
63
94
89
0
#DIV/01
0
#DIV/01
140%
113
]9
109
87
0
#DIV/01
0
#DIV/01
150%
122
88
117
9fi
0
#DIV/0!
0
#DIV/01
Scenario Name:
System Curve ID=
System curve ID=
System curve ID=
system curve ID=
system Description:
system Description:
system Description:
System Description:
�e
Model File Name:
Model File Name:
Model File Name:
Model File Name:
C
Motlel Scenario:
Motlel Scenario:
Model Scenario:
Model Scenario:
y
Suction WSE or HGL (ft) =
Suction WSE or HGL (ft) =
Suction WSE or HGL (ft) =
Suction WSE or HGL (ft)=
T
Discharge WSE or HGL(ft)-
Discharge WSE or HGL (ft)
Discharge WSE or HGL (ft)
Discharge WSE or HGL (ft)
(n
Static Heed k =
0
Static Heed k =
0
Static Heed k =
0
Static Heed ft =
0
Pipe Friction Coefficient=
Pipe Friction Coefficient=
Pipe Friction Coefficient=
Pipe Friction Coefficient=
Flow from model (gpm) =
Flow from model (gpm) =
Flow from model (gpm) =
Flow from model (gpm) _
TDH from Model (ft) =
TDH from Model (ft) =
TDH from Model (ft) =
TDH from Model (ft)=
Friction Head =
0
Friction H==
0
Friction Head =
0
Friction Head H =
0
Percent of Modeled
Flowk
Flow
Head
PH
Flow
Heatl
ft
Flow
Head
k
Flow
Head
ft
0%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
10%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
20%
1 0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
30%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
40%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
50%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
60%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
70%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
80%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
90%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
100%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01
120%
0
#DIV/01
0
#DIWol
0
#DIV/01
0
#DIV/01
140%
0
#DIV/01
0
#DIV/01
0
#DIV/01
0
#DIV/01

Penn Valley 4DDSX30 One Pump Operation System Curves CDM.
smith
180.0
75 GPM
160.0
� `ro
140.0
120.0
` Worst Case
Estimated Flow Rate
100.0
Routine Estimated
M "Flow Rate
v
= 80.0
as
i I V010 Ne
60.0
40.0
20.0
0.0
0 20 40 60 80 100 120 140
Flow (gpm)

CDM CLIENT City of Greensboro JOB NO. 6145-217155 DATE 12/13/17
DATE COMPUTED
Smith PROJECT Ash Clarifierlmprovements CHECKED 1/18/2018 BY SSK
DETAIL Hydraulic Model - Schematic and Scenarios CHECKED CSF
BY
Hydraulic Model - Schematic

Hydraulic Model - Reservoir Table
ID Label Elevation (ft) Zone Flow (Out net) (gpm) Hydrai
Grade
30 R-1 720.58 <None> 78 720.E
68 Ash Press 737 <None> -78 737
Hydraulic Model - GPV Table
Hydraulic
Hydraulic Grade
CDMCLIENT
ID
Label
City of Greensboro
Diameter (in)
JOB No
6145-217155
DATE 12/13/17
Smith
PROJECT
Ash Clarifier Improvements
CHECKED
1/18/2018
comauT BD SSK
DETAIL
Hydraulic Model - Components
737
CHECKED BY
CSF
760.38
Note: Values on these Tables were derived from running the Design Head Scenario
23.1
Hydraulic Model - Pump Table
Hydraulic
Status
Hydraulic Grade
Flow (Total)
ID
Label
Elevation (ft)
Pump Definition
Grade
Pump Head (ft)
(Initial)
(Discharge) (ft)
(gpm)
(Suction) (ft)
31
PMP -1
706.91
Penn Valley 40DDS 250 RPM
On
718.06
772.27
78
Hydraulic Model - Reservoir Table
ID Label Elevation (ft) Zone Flow (Out net) (gpm) Hydrai
Grade
30 R-1 720.58 <None> 78 720.E
68 Ash Press 737 <None> -78 737
Hydraulic Model - GPV Table
Hydraulic
Hydraulic Grade
ID
Label
Elevation (ft)
Diameter (in)
Flow (gpm)
Grade
(To) (ft)
Headloss (ft)
(From) (ft)
72
Nozzle Loss
737
3
78
760.38
737.28
23.1

CDMCLIENT
Smith
PROJECT
DETAIL
City of Greensboro
Ash Clarifier Improvements
Hydraulic Model - Pipe Table
JOB NO.
DATE CHECKED
CHECKED BY
$145-217155 DATE
1/1$/1$ COMPUTED
BY
CSF
12/13/17
SSK
Hydraulic Model - Pipe Table
ID
Label
Length
(Scaled)
(ft)
Start Node
Stop
Node
Diameter
(in)
Hazen-
Material
Williams C
Minor Loss
Coefficient Flow (gpm)
(Local)
Velocity
(ft/s)
Headloss
Gradient (ft/ft)
LengthHeadloss
(User
Defined)
ft
(Friction)
(ft)
Headloss
(Minor) (ft)
32
P-1
66
R-1
PMP -1
2.9
CPVC 100
0
78
3.81
0.05
50
1.87
0.65
46
P-2
265
PMP -1
J-4
2.9
CPVC 100
0
78
3.91
0.08
50
1.98
2.04
52
P-5
128
J-4
J-6
2.9
CPVC 100
0
78
3.91
0.083
6
0.24
0.26
56
P-7
93
J-6
J-10
2.9
CPVC 100
0
78
3.91
0.044
33
1.31
0.14
67
P-10
129
J-10
J-14
2.9
CPVC 100
0
78
3.91
0.042
100
3.97
0.19
79
P-14
45
GPV-1
Ash Press
2.9
CPVC 100
0
78
3.91
0.277
1
0.04
0.24
84
P-15
101
J-14
J-16
2.9
CPVC 100
0
78
3.91
0.068
10
0.4
0.28
86
P-16
25
J-16
J-17
2.9
CPVC 100
0
78
3.91
0.068
5
0.2
0.14
88
P-17
45
J-17
GPV-1
2.9
CPVC 100
0
78
3.91
0.082
9
0.36
0.38

Mixing Ring Losses
23.1 ft
1.000
500
;
a 100
so
Q 10
LL
s
minor Loss 4.32 ft
CDM
CLIENT City of Greensboro
JOB NO.
6145-217155 DATE 12/13/17
I 2.5
PROJECT Ash Clarifier Improvements
DATE
1/18/18 COMPUTED BY SSK
From Figure 19-4
CHECKED
Routine Friction Loss 25.9 ft
Smith
DETAIL Hydraulic Model -Pipe Table
CHECKED
CSF
Worst Case Friction Loss 41.5 ft
Worst Case Max TH 85.3 ft
Worst Case Estimated Flow Rate I 64 gpm
Water Max TDH 54.21 ft
0.1 oz�l 3 0.s 1.o z.o
� 10n
v.bcity, ,rvs
Static lift Max 16.42 ft
t. i c l 1 1 t u a
01 0.2 03 1.0 20
Mixing Ring Losses
23.1 ft
1.000
500
;
a 100
so
Q 10
LL
s
minor Loss 4.32 ft
Friction Loss 10.37 ft
Velocity 3.91 fps
Routine/headloss Factor
I 2.5
From Figure 19-5
Worst Case
41
From Figure 19-4
Routine
Routine Friction Loss 25.9 ft
Routine Max TH 69.8 ft
Routine Estimated Flow Rate 70 gpm
Worst Case
Worst Case Friction Loss 41.5 ft
Worst Case Max TH 85.3 ft
Worst Case Estimated Flow Rate I 64 gpm
1
MEME
tA00
a 14
MINNIE
500
III
I
tA00
500
� 10n
a
s
to
s
ofliie4
.retacJry
"PI
%7—Osl-
1
—A
0-1 0.5 1 5 10 0-1 0.5 1 5 10
Vowty. fin +L�[VC CRAPH Vglpi,'ity, 1N5
figure 19-4. Recommended design curves. Headloss prediction for worst-case design. Figure 19-5. Recommended design curves. Head— prediction for routine operation.

Prepared By: Jorge Arevalo 12/15/2017
Checked By: C. Hobbs 12/22/2017
Client: City of Greensboro
Project Name TZO WRF Ash Clarifier Project 6145-217155
Calculation Detail New Clarifier Sizing
ASH CLARIFIER FLOWS
gpm
Minimum
Average
(calculated)
Peak NOTES
FBI No. 1 Scrubber
gpm
400
400
400 Pump station to be installed with 400 -gal pumps (max flow)
FBI No. 1 Quencher
gpm
635
692.5
750
FBI No. 2 Scrubber
gpm
280
327.5
375
FBI No. 2 Quencher
gpm
650
725
800
Belt Filter Press Drain (gravity flow)
gpm
100
100
100 Used 100 gpm (Arcadis provided value between 65 gpm and 110.50 gpm)
Only one FBI is allowed to burn sludge at a time.
Average Flow (FBI No. 1 in service)
gpm
1192.5
flow
Average Flow (FBI No. 2 in service)
gpm
1152.5
1964
3558 Peak flow when second FBI is warming up to replace FBI in operation
Maximum Flow (1 FBI in service)
gpm
1275
1.4
Maximum flow received with 1 FBI in operation (FBI No. 2 scrubbers and quencher) + flow from new
Detention Time
min
62.62
57.58
Belt Filter Press
Peak Flow (2 FBIs on)
gpm
2310
Maximum flow received with 1 FBI in operation and burning sludge (FBI No. 2) and minimum flow
Solids' Loading Rate (based on average calculated value*)
Ib/day/ft2
42.6
from 1 FBI in startup mode (FBI No. 1, no sludge burning) + flow from new Belt Filter Press
ASH CLARIFIER SOLIDS LOADS
Ib/day/ft3
FBI No. 1
FBI No. 2
NOTES
FBI No. 1 Scrubber (calculated)*
Ib/hr
301
*Values calculated based on 65 dry tons of sludge burned per day:
Weir Overflow Rate
gpd/ft
17914
19481
5417 dry Ib sludge/hr x 0.268 Ib of ash/Ib of dry solid = 1,452 Ib of ash/hr (loading value increased to
FBI No. 1 Quencher (calculated)*
Ib/hr
1206
1507 Ib/hr to include safety factor for formation of silicates, inert compunds, etc)
FBI No. 2 Scrubber (calculated)*
Ib/hr
301
[Data obtained from FBI No. 2 Design Draings (Mass and Energy Balance sheet, FBI #2 record
FBI No. 2 Quencher (calculated)*
Ib/hr
1206
drawings, CDM Smith, 2012)]
Belt Filter Press Drain (average calculated)*
Ib/hr
150.7
150.7
Calculated assuming 1507 Ib/h feed to BFP and 90% solids capture. Pilot test obtained >95% solids capture
Belt Filter Press Drain (maximum calculated)*
Ib/hr
226.05
226.05
Calculated assuming 1507 Ib/h feed to BFP and 85% solids capture. Pilot test obtained >95% solids capture
Belt Filter Press Drain (max instantaneous calculated)*
Ib/hr
300
300
Calculated assuming 2000 Ib/h feed to BFP (max design capacity) and 85% solids capture. Pilot test obtained >95% solids capture
Total Solids (average calculated)*
Ib/hr
1658
1658
Total Solids (maximum calculated)*
Ib/hr
1733
1733
Total Solids (instantaneous load calculated)*
Ib/hr
1807
1807
Only one FBI is allowed to burn sludge at a time.
Total solids based on clarifier influent sample
Ib/hr
1229.6
See 3-29-2017 TSS results tab
ASH CLARIFIER LOADINGS
NOTES
Diameter
ft
34.5
34.5
34.5 -ft tank
Effective Diameter
ft
30
30
Diameter between launders
Surface Area
ft2
935
935
calculated
Depth
ft
10.5
10.5
10.5 -ft tank to top of weir wall
Tank volume
ft3
9816
9816
calculated
Average Maximum Peak flow
Loadings are lower with the new clarifier than the existing clarifier. There were not reported issues with the existing unit therefore the sizing of the proposed clarifier appears to be adequate for the application.
flow
flow
Hydraulic Loading Rate
gpd/ft2
1837
1964
3558 Peak flow when second FBI is warming up to replace FBI in operation
Hydraulic Loading Rate
gpm/ft2
1.3
1.4
2.5
Detention Time
min
62.62
57.58
31.78
Solids' Loading Rate (based on measured TSS)
Ib/day/ft2
31.6
Solids' Loading Rate (based on average calculated value*)
Ib/day/ft2
42.6
Solids' Loading Rate (based on maximum calculated value*)
Ib/day/ft3
44.5
Solids' Loading Rate (based on average calculated value*)
Ib/day/ft4
46.4
Weir Overflow Rate
gpd/ft
17914
19481
35294
Loadings are lower with the new clarifier than the existing clarifier. There were not reported issues with the existing unit therefore the sizing of the proposed clarifier appears to be adequate for the application.

City of Greensboro
T.Z. Osborne WRF Ash Clarifier Improvements
Buoyancy Calculations
�.•�P.�N CARO''��,,
2►:. of �.
z ;
�'••; alis �!�Q�NE�SQ'' Cay`
lot

CDM Smith
5400 Glenwood Avenue
Suite 300
Raleigh, NC 27612
Client City of Greensboro
Project TZO Ash Clarifier Improvements
Detail Buoyancy
Job No. 6145-217155
Dale Checked JSB
Checked By 1/11/2018
Computed By Karthik A
Date 11/15/2017
Page No. 1
This program should only be used with a full knowledge of the analysis procedure used in the program. Result of the program is subject to structural I
engineering evaluation and judgement. This program is for the use of CDM Structural Engineering Staff Only.
Concrete Density (y.) 0.150 kip/ft Backfill Soil Density (ysat) 0.120 kip/ft3
(Typ. Range 100 to 125 pct)
0.0624 kipfft3 Soil Friction Angle (0) 30
Water Density (y,v) (Typ. Range 15 to 20 deg)
Structure Dimensions
Base Slab Thickness at 12 in Height of Walls above 14 ft
Inside Diameter (d) 34.5 ft
Wall (tt,s,,,) Base Slab (h i)
Wall Thickness (t,v) 14 in Base Slab Thickness at 12 in Height to Grade above 1 ft
Center (tbsc) Base Slab (h aJ
Base Slab Slope, ft/12ft (s) 2.75 in Base Slab Toe Width (/toe) 12 in Height
t o GWL (h )above 1 ft
Base Top Slab Thickness (tts) 0 in , Conservatively take groundwater @ grade
EL 711.00'
of Displaced Water -Above Base Slab Level (cylinder)
of Displaced Water -Above Base Slab Level (Cone)
of Displaced Water- Volume of Base Slab
Volume of Displaced Water -Total
Uplift Force (U)
of Top Slab (wts)
of Base Slab (wbs)
Weight of Walls (ww)
1�
4(d+212) h =
3(d+212J' 4-s•2d2=
�(d+21.121,x1 h =
( d+ 2 r„ i /foe 2 12 Y=
rrl 2 J
I�d+21 12/��, 1'—d'�h, Wye_
of Soil Above Toe h„ )y,,, + [),,, (Y,,,
of Soil in "Pullout Wedges" (ws2)
of Structure
Weight of Structure +Soil Area 1
ht of Structure +Soil Area 1 +Soil Area 2
Weight
of
Structure /Uplift
OK
Weight
of
Structure +Soil Area 1
/Uplift
he TAA(0)Ys, hzTAA(¢)Y,. '' d
1.1
OK
1.25
OK
1.5
OK
1065.5 ft3
1404.1 ft3
1184.4 ft3
3654.0 ft3
228.01 kip
0.00 kip
177.66 kip
274.52 kip
6.85 kip
452.18 kip
459.03 kip
460.83 kip

City of Greensboro
T.Z. Osborne WRF Ash Clarifier Improvements
Section 4
Residuals Management Plan
At the T.Z. Osborne WRF, primary and waste activated sludge is incinerated in a 65 dry ton per day
fluidized bed incineration (FBI) system located in the solids handling building. Dewatered sludge
from the centrifuges is conveyed to sludge hoppers through a series of troughed belt conveyors.
Sludge piston pumps feed sludge into the FBI system. The FBI uses No. 2 fuel oil as the primary fuel
in the reactor vessel, with natural gas as a backup. A Hydro -Sonic Systems tandem nozzle scrubber
is attached to the outlet of the new FBI to treat exhaust gases. Ash slurry is dewatered and land-
filled at the City landfill.
Based on historical plant data, typical blended solids characteristics are:
Average dry solids from dewatering: 27.9%
Average volatile solids:
73.2%
Typical solids heating value of volatile solids: 10,000 Btu/lb
Typical solids heating value on a dry solids basis: 7,320 Btu/dry lb.
The City has an air quality permit for operation of the FBI (ES -20) which is AP No. 04489R20.

PROPOSAL
CONTRACT NO 2017-014A
T.Z. Osborne Water Reclamation Facility Improvements
Volume I — Ash Press Replacement
Volume 11 —Ash Clarifier Improvements
To the City Council
City of Greensboro
Greensboro, North Carolina
Council Members:
The undersigned, having visited the Site of the proposed Work, read and understood the
Bidding Documents, , and all reports and drawings of existing subsurface, if any, and
physical conditions at the Site, and all reports and drawings of a Hazardous
Environmental Conditions (if any) at the Site, as indicated in the Supplementary
Conditions, and understanding Laws and Regulations applicable to the Work, agrees to
provide all labor, equipment, materials, and other work necessary for and to construct the
Work in the manner required by the proposed Contract Documents; and pursuant to the
Bidding Requirements, submitted herewith a bid security in the form of a certified check
for the sum of dollars, or bid bond in the amount of
percent of the amount bid payable to the City of Greensboro, North Carolina, under
conditions indicated in the Bidding Documents. The Bid is valid and subject to the
Owner's acceptance for the period of time indicated in the Instructions to Bidders for this
Project.
2. The undersigned proposes to enter into a Contract in accordance with the Bidding
Documents for the prices shown on the pricing sheets that are part of this Proposal.
3. It is understood that all quantities of Unit Price Work are approximate and subject to
variation from those shown in this Proposal.
GRGRN140.DO01 00 42 00-1 Contract No. 2017-014A
100% Submittal TZO Water Reclamation Facility Improvements
Blue Pages

ITEMIZED PROPOSAL
T.Z. Osborne Water Reclamation Facility Improvements
Volume I — Ash Press Replacement
Volume 11 —Ash Clarifier Improvements
Contract 2017-014A
Item
Unit Bid Price
Amount Bid
Pay
Line
Sect.
Paid
Item
No.
No.
By
Description
Qty
Unit
Dollars
Cents
Dollars
Cents
No.
Special
xxx
1
SP
ENG
GENERAL
1.0
LS
CONSTRUCTION
ALLOWANCE FOR
xxx
2
SP
ENG
ROTARY PRESS
$177,900
NA
CONVERSION
3
SP
ALLOWANCE FOR
$ 50,000
NA
PROGRAMMING
4
SP
ALLOWANCE FOR
$350,000
NA
CONTINGENCY
xxx
5
SP
ENG
ROCK
400
CY
EXCAVATION
TOTAL AMOUNT BID FOR ENTIRE CONTRACT
BID ALTERNATIVES
Bidder must complete Alternate Bid Item A. The OWNER will Determine which, if any, Alternate
Bid Items will be selected. CONTRACTOR is responsible for tracing all impacts of the alternates
through the drawings and specifications and factoring in those costs in the amount for the costs
provided below. The OWNER is in no way obligated to accept any Alternate Bid Items.
Acceptance shall not result in any changes to the Contract Time.
ITEM DESCRIPTION
A. Double Disk Ash Pump adjustment if Penn Valley Pump Company is not included in Base
Bid Item No. 1:
Adjustment to Base Bid Item No. 1 for the Double Disk Ash Pump (Section 46 33 42) to
be provided by Penn Valley Pump Company. Include all state and local and use taxes.
Adjustment to Bid Item No. 1 (add/subtract)
(use words)
(numerals)
GRGRN140.DO01 00 42 00-2 Contract No. 2017-014A
100% Submittal TZO Water Reclamation Facility Improvements
Blue Pages

4. It is understood that the City reserves the right to reject any or all bids and to award the
contract in the best interest of the Project.
5. The undersigned certifies and agrees that the following information is correct in reference
to the City of Greensboro's M/WBE Plan for Construction, Professional Services, Goods
and Other Services, established October 15, 2013, by the Council:
a. In preparing the Bid, the Bidder has considered all proposals submitted from
qualified, potential Subcontractors and suppliers, and has not engaged in
"discrimination" as defined in the City's M/WBE Program Plan, Section V. A. 1.; to
wit: discrimination in the solicitation, selection or commercial treatment of any
Subcontractor, vendor, supplier or commercial customer on the basis of race,
color, religion, ancestry or national origin, sex, age, marital status, sexual
orientation or on the basis of disability or other unlawful forms of discrimination.
Without limiting the foregoing, "discrimination" also includes retaliating against any
person or other entity for reporting any incident of "discrimination". Without limiting
any other provision of the solicitation for responses on this project, it is understood
and agreed that, if this certification is false, such false certification will constitute
grounds for the City to reject the Bid submitted by the Bidder on this project, and
terminate any contract awarded based on the response. As part of its response,
the Bidder shall provide to the City a list of all instances within the immediate past
4 years where there has been a final adjudicated determination in a legal or
administrative proceeding in the State of North Carolina that the Bidder
discriminated against its Subcontractors, vendors, suppliers or commercial
customers, and a description of the status or resolution of that complaint, including
any remedial action taken. As a condition of submitting a Bid to the City, the
Bidder agrees to comply with the City's Commercial Nondiscrimination Policy as
described under its M/WBE Program Plan, Section V. A. 1.
6. In default of the performance of any of these conditions on our part to be performed, the
bid security attached hereto shall at the option of the City Council become the property of
the City of Greensboro, N. C., as ascertained and liquidated damages for such defaults;
otherwise the said bid security is to be returned to the undersigned or destroyed.
7. Time of Completion - Bidder agrees that the Work will be substantially complete and
completed and ready for final payment in accordance with Paragraph 14.07 of the
General Conditions on or before the dates or within the number of calendar days
indicated in the Section 00 73 01, Contract Supplementary Conditions, if any, Article 7.1
and in the Agreement.
COMPANY:
LICENSE NO.
SIGNED BY:
TITLE:
GRGRN140.DO01 00 42 00-3 Contract No. 2017-014A
100% Submittal TZO Water Reclamation Facility Improvements
Blue Pages

8. Attachments to this Proposal — Refer to Section 00 21 13, Instructions to Bidders.
ATTEST:
ADDRESS:
Acknowledgment of Addendum(s):
Number Date
SEAL
(company seal must be affixed)
Initialed
GRGRN140.D001 00 42 00-4 Contract No. 2017-014A
100% Submittal TZO Water Reclamation Facility Improvements
Blue Pages