WQ0016423_Application_19990209

t2 ie
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. Gray Walls, Town Engineer
Town of Troy
444 North Main Street
Troy, North Carolina 27371
Dear Mr. Walls:
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
RECEIVED
February 9, 1999
FEB 10 1999
FAYMEVILLE
REG. OFFICE
Subject: Application No. WQ0016423
Poole Road Subdivision
Sewer -Public
Montgomery County
The Division's Permits and Engineering Unit acknowledges receipt of your permit application and
supporting materials on February 8, 1999. This application has been assigned the number listed above.
Your project has been assigned to Mr. Ron Palumbo for a detailed engineering review. Should there be
any questions concerning your project, the reviewer will contact you with a request for additional information.
Be aware that the Division's Regional Office, copied below, must provide recommendations from the
Regional Supervisor or a Procedure Four Evaluation for this project, prior to final action by the division.
If you have any questions, please contact Mr. Ron Palumbo at 91gn33-5083 ext. 533 .If the engineer is
unavailable, you may leave a message on their voice mail and they will respond promptly.
PLEASE REFER TO THE ABOVE APPLICATION NUMBER WHEN MAKING INQUIRES ON
THIS PROJECT.
Sincerely,
j,'/1
-M(+)'. - I
r. Kim H. Colson, E.
Supervisor, Non -Discharge Permitting Unit
cc: Fayetteville Regional Office, Water Quality
Central Carolina Engineering, PA
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

----"" ' State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
Non -Discharge Permit Application t ci;
(THIS FORM MAY BE PHOTOCOPIED FOR USE AS AN ORI(5INAL)
GRAVITY SEWER EXTENSION Fri 0 8
PUMP STATIONS, AND PRESSURE SEWERS-,��y
riir,G
I. GENERAL INFORMATION:
1. Applicant's name (please specify the name of the municipality, corporation, individual, etc.):
Town of Troy
2. Print Owners or Signing Official's name and title (the person who is legally responsible for the facility and its compliance):
Gray Walls, Town Engineer
3. Mailing address: 444 North Main Street
City: Troy State: NC Zip: 27371
Telephone Number. ( 910 ) 5 7 2— 9 2 2 6
4. Project Name (please specify the name of the subdivision, facility, or establishment - should be consistent with project
name on plans, specifications, letters of flow acceptance, Operational Agreements, etc.):
Poole Road Subdivision Sewer System
5. Application Date: 1/ 7/ 9 9 6. Fee Submitted: S $ 4 0 0
6. County where project is located: Montgomery
II. PERMIT INFORMATION:
1. Application No. (will be completed by DElvi): f(_(2(423
2. Specify whether project is: X new; modification.
3. If this application is being submitted as a result of a modification to an existing permit, please complete:
existing permit number
and the issue date
4. Specify whether the applicant is X public or private.
III. INFORMATION ON WASTEWATER:
1. Nature of Wastewater. 1 0 0 % Domestic/Commercial ; % Industrial;
% Other waste (specify):
2. Please provide a one or two word description specifying the origin of the wastewater, such as school, subdivision, hospital.
commercial, industrial, apartments, etc.: Subdivision
3. Indicate any parameter(s) (and their concentration) that will be greater than normal domestic levels: None
4. If wastewater is not domestic in nature, what level of pretreatment has been provided to ensure protection of the receiving
wastewater treatment facility? N / A
FOR.": GSPSA 11/93 Page 1 of

5. If a pretreatment permit is required, has one been issued? Yes No. If yes, please attach a copy of the
pretreatment permit. If No, when will one be issued
6. Volume of wastewater generated by this project: 2 5 0 0 - gallons per day.
7. Explanation of how wastewater volume was determined: Assume 350 GPD per household
IV. DESIGN INFORMATION:
1. Briefprojectdescription: 1- Section.�of gravity sewer runs behind p rnpncacJ hnnaAs
to small grinder pumpostation. A 2" forcemain will carry sewer
approx 650 feet to existing sewer collection system.
2. Name of wastewater treatment facility receiving wastewater.
Town of Troy
a. Facility Permit Number. NC 0 0 2 8 916
b. Engineer should provide statement of his evaluation of downstream sewers ability to accept the wastewater.
Down stream sewer collection line, pump station and fnrcemain
will have no prnhlem with this flew.
c. Permit Number for sewers immediately downstream: Unknown
611
d Pipe diameter of sewers immediately downstream:
3. Summary of sewer pipe to be permitted, by diameter size and pipe material:
Diameter
(in)
Length
(linear feet)
Pipe
Material
Circle or
N Factor &
Specify
Value
Minimum
Slope (%)
Maximum
Slope (%)
Minimum
Velocity
(fps)
Maximum
Velocity
(fps)
Minimum
Cover (in)
8
389
PVC
---
140
:67
.67
2.12
3.43
36
NOTE: The
minimum velocity
must not
be less than 2 fps.
For
public sewers the
minimum
diameter is 8 Inches.
For
private sewers the
minimum
diameter Is 6 inches.
4. Anchors shall be provided for sewers with slopes greater than 20 %. The anchor spacing shall be a maximum of: 36 fat
separation for slopes of 21% to 35%; 24 feet separation for slopes of 36% to 50%; 16 feet separation for slopes greater than
50%.
For velocities greater than 15 fps, it is strongly recommended that measures be considered which will protect the sewers and
manholes from erosion. For velocities greater than 20 fps, erosion pontrol measures must be specified.
For any excessive slopes or velocities that will occur in any sewer line segment, what measures have been taken to protect
the sewer pipe and manholes? N / A
FORM: GSPSA 11/93 Page 2 of 8

5. Maximum sewer reach length between manholes: 389 linear feet.
6. This sewer line segment occurs between manhole no. 1 and niWW" pump station
ialii
7. Does the owner/operator have the ability to clean this length? x Yes No. For sewer reach lengths greater
than 425 feet, please provide a letter from the owner/operator, stating the ability to clean the speed reach and include the
equipment specifications.
8. Sewers subject to existing or planned traffic bearing loads? Yes x No. If yes, what measures are being taken
to enable the sewers to withstand the loads?
9. Outside drop manholes are provided where invert separations exceed:2 ' S feet (provide for separations > or = 2-T)
10. Identify (by manhole number) those manholes that have drop connections:
None
11. Maximum allowable infiltration/exftltration test rate: 100
NOTE: Must not exceed 100 GPD/pipe diameter inchtmile of pipe.
GPD/pipe diameter inch/mile of pipe.
12. Minimum separation distances as shown on the plans or addressed in the specifications. If a. b, or c below is no, explain
in an attachment (This section must be completed for all collection systems including force mains and pressures sewers):
a). 100 ft. horizontal separation from wells or other water supplies? x Yes No
b) 12 in. vertical separation from storm sewer or ferrous pipe sanitary sewer speed? -.&- Yes No
c) 10 ft. horiz. sep. from water mains or 18 in vertical sep. (water over sewer) or ferrous pipe specified? x Yes --No
13. Are manholes subject to flooding? Yes x No. If yes, are manhole rim elevations 1 foot above 100-year flood
level, (100 year flood elevation should be indicated on plans) Yes No; Or, are manholes watertight and vented 1
foot above the 100-year flood elevation ( should be shown on plans): Yes No
14. Identify (by manhole number) those manholes that are vented
15. Does this project involve any stream crossings? X— Yes No. If yes, what precautions or special features have been
utilized to ensure protection of the sewer line and not restrict stream flow? Identify the sheet of the plans and station
number where stream crossings are located: Ductile iron pipe specified fog- crossing
with V-6" cover below stream bed. Ref Sheet #2, station 5+20.
Please note: The Division recommends all stream crossings be located three (3) feet below the stream bed or ferrous
material pipe be specified. In addition, all aerial stream crossings must be located above the 25-year flood elevation. Both
the 25-year flood elevation and the 100-year flood elevation should be indicated on the plans.
16. Sewers may = be installed in WS-I watersheds. Are any of the subject wastewater collection systems located in a WS-1
watershed? Yes x No.
17. Miscellaneous comments:
FORM: GSPSA 11193
Page 3 of 8

V V. PUMP STATION INFORMATION
1. Pump Station No. or Name: Poole Road(A separate sheet 4 of 8 should be submitted for each pump station)
2. Name of closest downslope surface waters:
Warner Creek
3. Classification of closest downslope surface waters: Class C (as established by the Environmental Management
Commission & specified on sheet 5 of 8 of this application).
4. In accordance with 15A NCAC 2H .0219 (h)(3), describe the measures that are being implemented to prevent impacts on
downslope surface waters, should a power failure occur at this pump station. NOTE: Alternative power MUST be
addressed for every pump station in accordance with the above regulation.
at station
SCADA system to be installer
5. What size pumps are provided: 26 GPM; and how many? 2
6. What is the design total dynamic head? 41 fat
How many pumping cycles will occur at average daily flow? 2.2 6 cycles per hour.
NOTE: 15A NCAC 2H .0219 (h)(2) requires 2 to 9 pumping cycles per hour be achieved at average daily flow.
8. The following items are typically required in the design for pump stations. Check the appropriate blank to signify that
these items havC h= provided in the design plans/specifications:
Alternate Power Source
Wet Well Vented with Screen
Fillets in Wet Well >:
Check Valves and Gate Valves
Security Fencing
Lockable Wet Well Cover
Area Light
110V Electrical Convenience Outlet
Flood/Buoyancy Protection
High Water Alarm (one choice may be speed)_ Audible and Visual Auto Dialer
d' ze and i material•
9. summary
Diameter
(in)
of torte main
Length
(linear feet)
to ve pwcmll
Pipe
Material
U. by tameter
High
Elevation
a
Low
Ele frtion
Minimum
Velocity
Maximum
Velocity
Minimum
Cover (in)
2
636
PVC
97.75
70
2.65
2.65
10. Are air release valves provided at all high points along the force main (must be provided where the elevation difference
exceeds 10 feet)? x_ yes _ no
11. Is pump station subject to flooding? yes X no. If yes, what measures are being taken to protect against flooding?
12. If subject to flooding, specify the 100-year flood elevation: Feet MSL
13. Are there existing or planned pump stations downstream of this station? X Yes No. If yes, the engineer shall
evaluate the ability of those pump stations to adequately handle the subject flows and shall include that evaluation as an
attachment to this application.
Pae4of8
FORM: GSPSA 11/93 s

Attachment - Ref.: Poole Road Subdivision Sewer
Town of Troy
Pump Station Information - Page 4, Heading V, Item -13
The C&A pump station is capable of handling this small additional flow. Station carries
only domestic gravity sewer for Norwood Yarns and Allendale Knitting, approximately 400
employees total.
This station is monitored by the Town's SCADA system and has never given a high water
alarm during any heavy rainfall. The pumps are 150 GPM.
The station takes on average 45 minutes to fill. Additional flow will help this station since
water usage has dropped consistently over the years.
E. Gray Walls, PE

This form must be completed by the appropriate DEM regional office and included as a part of the project
submittal information.
INSTRUCTIONS TO NC PROFESSIONAL ENGINEER:
The classification of the downslope surface waters (the surface waters that any overflow from the facility would flow toward)
in which these sewers will be constructed must be determined by the appropriate DEM regional office. Therefore, you are
required, prior to submittal of the application package, to submit this form, with items 1 through 7 completed, to
the appropriate Division of Environmental Management Regional Water Quality Supervisor (see page 8 of 8). At a
minimum you must include an 8.5" by I I" copy of the portion of a 7.5 minute USGS Topographic Map which shows the
location of these sewers and the downslope surface waters in which they will be located. Identify the closest downslope
surface waters on the attached map copy. Once the regional office has completed the classification,
reincorporate this completed page and the topographic map into the complete application form and
submit the application package.
1. Applicant (specify name of the municipality, corporation, individual, etc.): Town of Troy
2. Name & complete address of engineering fi
Central Carolina Engineering, PA
rm:
444 North Main StTroy-
Telephone number.. ( 91 0 ) 5 7 2 9 2 2 6 -
3 Project name: Poole Road Subdivision Sewer System
4. Name of closest downslope surface waters: Warner Creek
5. County(s) where sewers and surface waters are located: Montgomery
6. Map name and date: Troy. 1
982
7. NC Professional Engineer's Seal, Signature, and Date:
TO: REGIONAL WATER QUALITY SUPERVISOR
Please provide me with the classification of the watershed where these sewers will be constructed, as identified on the attached
map segment
Name of surface waters: Warner Creek. Designation supplied 3/7/94
,, Classification (as established by the Environmental Management Commission):
Proposed classification, if applicable:
Signature of regional office personnel:
(All aaachments must be signed)
FORM: GSPSA 11/93 Page 5 of 8
Class C
Date:

THIS APPLICATION PACKAGE WILL NOT BE ACCEPTED BY THE DIVISION OF ENVIRONMENTAL
MANAGEMENT UNLESS ALL OF THE APPLICABLE ITEMS ARE
INCLUDED WITH THE SUBMITTAL
Required Items
a. One original and one copy of the completed and appropriately executed application form. If modifications to the form a
required as a result of additional information requests by the Division, the additional information must be transmitted tmd
the signature of the applicant and the actual modification must be initialed by the NC Professional Engineer.
b. Two (2) sets of detailed plans and specifications signed and sealed by a North Carolina Professional Engineer. The plans mu:
include a general location map, a plan view of the sewer extension, a profile of the sewer extension, and must show th
proximity of the sewer extension to other utilities and natural features. Specifications may be omitted for delegate
authorities. Each sheet of the plans and the first page of the specifications must be signed and sealed. Two (2) copies of th
existing permit if a modification. The plans and specifications must not contain phrases (such as: FOR REVIEW ONLY
NOT FOR CONSTRUCTION, etc.) that indicate that they are anything other than final plans and specifications. However
the plans and specifications may contain: FINAL DESIGN - NOT RELEASED FOR CONSTRUCTION.
C. Two copies of all calculations, including pump selection, friction calculations, cycle time, pump curves (including systen
curves applicable with one pump running, two pumps running, three pumps running, etc.), and evaluation of downstrean
pump stations. These items must be submitted under the signature and seal of the NC Professional Engineer.
d. The appropriate permit processing fee, in accordance with 15A NCAC 2H .0205(c)(5). The fee for sewer extensions fa
nondelegated municipalities is $400. The fee for sewer extensions for delegated municipalities (applies only to those
governmental jurisdictions that have specific delegation review authority, as granted by the Environmental Managemen:
Commission) is $200. Name changes without other modifications are $100.
C. If the owner/authority of the wastewater treatment facility (WWTF) that will be accepting the wastewater flow from this
project is different from the applicant of the project, then a letter must be provided from the owner/authority of the WWTF
specifying the volume of flow that will be accepted. The letter should be a recent letter and should refer to the project by the
same name as that identified on the application and the plans/specifications.
L If the application is being submitted in the name of a privately owned public utility, evidence must be submitted from the
Utilities Commission which demonstrates that the utility is authorized to hold the franchise for the area to be served. In the
case of contiguous service areas, evidence must be provided from the Utilities Commission acknowledging these areas are
covered under an existing franchise.
g. A properly executed Operational Agreement (original and one copy - form provided by DEM) must be submitted if the sewer
extension will be serving single family residences, condominiums, mobile homes, or town houses and if the subject sewer
extension is owned by the individual residents, a homeowners association, or a developer.
h. The downslope surface waters classification must be determined by the appropriate DEM regional office, using page 5 of 8 of
this form, prior to the submittal of the application package to the Water Quality Permits and Engineering Unit. Once the
regional office has completed the classification, page 5 of 8 should be reincorporated into the application package and the
entire application package may then be submitted to Water Quality Permits and Engineering Unit.
i. A cover letter, which briefly describes the project, should be included with each application package. If necessary for clarity,
feel free to include attachments to the application form. Such attachments will be considered as part of the application and
should be numbered to correspond to the section to which they refer.
a
j. All materials and fees submitted in support of this request for a permit become the property of the Division of Environmental
Management; tberefore, if the permit is not issued for any reason, the Division will return submitted materials only at its
option.
FORM: GSPSA 11/93 Page 6 of 8

Central Carolina Engineering, PA
Name and Complete Address of Engineering Fun:
444 North Main St.
City: Troy State: NC zip. 27371
Telephone Number. ( 910 5 7 2— 9 2 2 6
Professional Engineer's Certification:
E. Gray Walls Poole Rd. Subdivision
I, , attest that this application for
has been reviewed by me and is accurate and complete 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 the applicable regulations. Although certain portions of this submittal
package may have been developed by other professionals, 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.
North Carolina Professional Engineer's Seal, Signature, and Date:
Fri
Applicant's Certification:
L Gray Walls attest that this application for Poole Rd. Subdivision
has been reviewed by me and is accurate and complete to the best of my knowledge. I understand that if all required parts of this
application 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.
Signature
Date 01 - Z i - 77
THE COMPLETED APPLICATION PACKAGE, INCLUDING ALL SUPPORTING INFORMATION AND
MATERIALS, SHOULD BE SENT TO THE FOLLOWING ADDRESS:
NORTH CAROLINA DIVISION OF ENVIRONMENTAL MANAGEMENT
WATER QUALITY SECTION
PERMITS AND ENGINEERING UNIT
POST OFFICE BOX 29535
RALEIGH, NORTH CAROLINA 27626-0535
TELEPHONE NUMBER: [phone]
FORM: GSPSA 11/93 Page 7 of 8

DIVISION OF ENVIRONMENTAL MANAGEMENT REGIONAL OFFICES (11/93)
Asheville Regional WQ Supervisor
59 Woodfin Place
Asheville, NC 28801
[phone]
Fax [phone]
Washington Regional WQ Supervisor
Post Office Box 1507
Washington, NC 27889
[phone]
Fax [phone]
Avery
Macon
Beaufort
Jones
Buncombe
Madison
Berrie
Lenoir
Bunim
McDowell
Camden
Martin
Caldwell
Mitchell
Chowan
Pamlico
Cherokee
Polk
Craven
Pasquomnk
Clay
Rutherford
Cuarituck
Perquimans
Graham
Swain
Date
Pitt
Haywood
Transylvania
Gates
Tyrell
Hendersan
Yancy
Greene
Washington
Jackson
Hertford
Wayne
Hyde
Fayetteville Regional WQ Supervisor
Wacbovia Building, Suite 714
Fayetteville, NC 28301
[phone]
Fax [phone]
Mooresville Regional WQ Supervisor
919 North Main Street
Mooresville, NC 28115
[phone]
Fax [phone]
Raleigh Regional WQ Supervisor
Post Office Box 27687
Raleigh, NC 27611
[phone]
Fax [phone]
Chatham
Nash
Durham
Northampton
Edgea mbe
Orange
Franklin
Person
Granville
Vance
Halifax
Wake
Johnston
Warren
Lee
Wilson
Wilmington Region. WQ Supervisor
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
[phone]
Fax [phone]
Anson
Moore
Alexander
Mecklenburg Brunswick New Hanover
Bladen
Robeson
Cabar:us
Rowan Carteret Onslow
Cumberland
Richmond
Catawba
Stanly Columbus Pender
Harnett
Sampson
Gaston
Union Duplin
Hoke
Scotland
lredell
Cleveland
Montgomery
Lincoln
Winston-Salem Regional WQ Supervisor
8025 North Point Boulevard, Suite 100
Winston-Salem, NC 27106
[phone]
Fax [phone]
Alamance Rockingham
Allegbany Randolph
Ask
Stokes
Caswen
Surly
Davidson
Watauga
Davie
Wilkes
Forsyth
Yadkin
Guilford
FORM: GSPSA 11/93 Page 8 of 8

TROY QUADRANGLE
S NORTH CAROLINA—MONTGOMERY CO.
7.5 MINUTE SERIES (TOPOGRAPHIC)
SW/4 TROY 15' QUADRANGLE F
598 55' 199 1 730 000 FEET '00 I 19 "3, 79°p2'30
Brans �xos�Nca�s r;
35`
\,ro (• „ �a,. <. N ,Y8 i : ♦ —' --$ran 0
I, n a\ 11 ur v
I (td r
r: —�
it 1-550
�W . • n• —� t Filtration O �V
�rw1 `�'�� °I �� y • 5�cP 590 C
163 • /y Il • I
e"1.. a' _ •�71t57t � I 1•ses• 1, FEET
n MIT' S
o Collies - -- a14
u csa1; • 1
nt C, _
l
wr
( .
^tea ' � b� _ , Itaot r E"I � P E •.wN+ � s* r ///1 3�
1ViT_j
tneia,
*12
-_ � 1� j _ �' � � � o�, h II, fie' _, • �: I
_ 1) ,, ! ' �' C •1 ' Substation ffj `-"'� x 575
fttap
II h i ;.x69?
If
J +;
/_r� - //r�-=N Sac___ _____ �• / �/� I� � � '
q :��JJ
k tit, N 1

HYDR CALCS Poole Rd PS.Xis
POOLE RD SUBDIVISION GRINDER PUMP STATION
LOCATION :POOLE ROAD APPROX 1 MILE WEST OF NC-109 NORTH
TOP OF PUMP STATION
78.25 (elev)
ELEVATION BOTTOM OF WETWELL
70.00 (elev)
PUMP OFF ELEVATION ABOVE BOTTOM WETWELL
71.75 (elev)
ELEVATION OF FORCE MAIN DISCHARGE
97.75 (ew)
ELEVATION HEAD ON PUMP
25.W (ft)
DIA OF WETWELL
4.00 (ft)
PUMP DOWN HEIGHT
1.50 (R)
VOLUME OF WETWELL
18.85 (cf)
PUMP ON ELEVATION
73.00 (elev)
GALLONS TO PUMP
140.99 (gab)
PIPE RUN FROM - TO: PUMPING WATER LEVEL IN WETWELL THRU BALL & CHECK VAULT
DESIGN Q = 26 GPM
PIPE DIA = 2 IN.
CHW = 120
TOT LF OF Y PIPE =
25
(LF)
1 - 2" BALL CHECK VALVE =
2
(EQUIV LF)
1 - 7' BASE 90 DEG) =
6
(EQUIV LF)
1 - 2" 90 DEG ELBOW =
5
(EQUIV LF)
1 - 2" TRUE UNION BALL VALVE =
2
(EQUIV LF)
1 - 2" FLAPPER CHECK VALVE =
15
(EQUIV LF)
55
(LF) DeItHf2 =
SUM of Dett2 =
Page 3
1.154 (friction HL in feet)
1.154 (tat 2" HL in fed)

HYDR CALCS Poole Rd PS.xls
PIPE RUN FROM - TO: DISCHARGE SIDE OF BALL 3 CHECK VALVE VAULT TO DISCHARGE INTO GRAVITY LINE
DESIGN Q = 26 GPM
PIPE DIA = 2 IN. 64.4
CHW = 120
TOT LF OF 2' PVC PIPE = 645 (LF)
1 - 2' BALL VALVE = 2 (EQUIV LF)
647 (LF) DeItH2 - 13.672 (friction HL in feet)
SUM of dWI2 = 13.572 (tot 2' HL in feet)
TOTAL ELEV (STATIC) HEAD = 26.000 (feet)
TOTAL DYNAMIC HEAD s 40.72E (feet)
VELOCITY ■ 2.EE42 (ftlsec)
PUMP TYPE: GRINDER MODEL M-3067 w/ a 212 IMPELLER
PUMP IS 240V SINGLE PHASE
PUMP MANUFACTURER: FLYGT OR APPROVED EQUAL
PUMP RATED 26 GPM a 41 TDH
PUMP HP 1.6
Page 4

PUMP STATION WETWELL SIZING.xls
TOWN OF TROY
PUMP STATION NAME: POOLE RD SUBDMSION DATE: O1/28/99
DESIGN PARAMETERS
PUMPING CYCLE = PUMPING TIME + FILL TIME FOR WETWELL
INFLOW = AVERAGE DAILY FLOW 3 GPM
PUMPING RATE 26 GPM
VOLUME OF WETWELL = ((PI*D**2)/4)*HEIGHT FT^3
HEIGHT = FROM PUMP START TO PUMP STOP 0.75 FT
D = DIAMETER OF WETWELL 4.00 FT
PUMPING TIME _ (VOL OF WETWELL + (INFLOW + PUMPING TIME))/PUMPING RATE
PUMPING TIME = VOLUME OF WETWELL/(PUMPING RATE -INFLOW)
VOLUME OF WETWELL =
9.42
FT^3
VOLUME OF WETWELL =
70.50
GAL
PUMPING TIME =
3.07
MIN
TIME TO FILL WETWELL =
23.50
MIN
PUMPING CYCLE =
26.57
MIN < 30 MIN
PUMP RUN TIME PERCENTAGE
CYCLES PER HOUR = 2.26
PUMP TIME ON PER HOUR = 6.92 MIN/HR
PERCENT STATION RUN TIME = 11.54%
Page 1

W.
Cn
..i
TOTAL HEAD FEET
O O O In C3
r-
bf
L a Limited to intemrttent duty
S = Risk of sedimeMation at velocity
below 2 fVsec.
CIE INPUT KW
0
7.�

mmN
ml�m