3265 Lexington Ave - Septic Design . , �,�r ���
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Eagan Buttding inspections Division
Prepared For: Engel Properties, LLC attn: Patti
Prepared By: Advanced OnSite, Inc.
Revised: October' 20, 2015
3265 Lexington �1ve S.
Eagan, 1�1N. 5 S 122
(PID # 100100075020)
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SEPTIC SYSTEM DESIGN
DESIGN CRITERIA;
Existing 3 bedroom type 1 single family home,without a garbage disposal. Will
be used as business office space, without a garbage disposal.
WATER USAGE;
600 gallons per day ma�cirnum.
PERCOLATION RATE;
6 to 15 minutes per inch.
SEPTIC TANK;
Pump, Collape, and fill existing tank. Install one 1,500 gallon double
compartment septic tank. Please see detail.
NOTES: 1) Tanks require pumping once every three years
2) Use"APPOVED" tanks only
PUMP CHAMBER;
Install a 1,000 gallon precast tank. Set as specified
NOTES: 1)An event counter is required.
2) Use "APPOVED" tanks only
DRAINFIELD;
Drainfield trenches, 462 square feet required, 504 square feet or 1681ineal feet of
36 inch wide trenches proposed of High Cap (12 Inch Side Wall Credit) Center
feed Chamber Type Trenches (without end cap consideration). 4 trenches at 24 ft
each(North) and 3 trenches at 24 ft each(South). Please see detail.
GENERAL CONSTRUCTION PRACTICES;
Divert all surface water away from the drainfield area. Do not disturb the
drainfield area during construction. Fence off the drainfield area before permit
application. If there are any questions regarding this design please contact Tom
Klanchnik at(612)232-9737.
� ���W OSTP Design Summary Worksheet UNIVERSTTY
Minn�sota Poitutlon OF MINN$SOTA
Control Agency "�'*�
Property Owner/Client: Engel Properties, LLC attn:Patti Engel Project ID: 100100075020 v 07.14.15
Site Address: 3265 Lexington Ave S Eagan,MN. 55122 Date: Oct.20,2015
1. DESIGN FLOW AND TANK$
A. Design Flow: 450 Gallons Per Day(GPD) Note: The estimated design flow is considered a peak flow rate
including a safety factor.For long term performance, the averoge
B. Septic Tanks: doily flow is recommended to be<60%of this va(ue.
Minimum Code Required Septic Tank Capacity: 1000 Gallons,in ��Tanks or Compartments
Recommended Septic Tank Capacity: 1500 Gallons,in ��Tanks or Compartments
Effluent Screen: NO! Alarm:�
C. Holding Tanks Only:
Minimum Code Required Capacity:��Gallons,in ��Tanks
Designer Recommended Capacity:C pC�Gallons,in �Tanks
Type of High Level Alarm: NONE
D. Pump Tank 1 Capacity(Code Minimum): 450 Gallons Pump Tank 2 Capacity(Code Minimum): �Gallons
Pump Tonk 1 Capacity(Designer Rec): 1000 Gallons Pump Tank 2 Capacity(Designer Rec): �Gallons
Pump 1 20.0 GPM Total Head 18.8 ft Pump 2�GPM Total Head ��ft
Supply Pipe Dia. 2.00 in Dose Volume: 75.0 gal Supply Pipe Dia.�in Dose Volume:��al
2. SYSTEM TYPE
Q Trench ,{�j Bed (�Mound Q At-G2de Q Gravity Disbibution Q Pressure Distribudon-Level �J pressure Distribution-Unlevel
O Orip (�Holding Tank (3 orher C� *Selection Required Benchmark Elevation: 100.00 ft
Benchmark Location: Bottom of Siding
System Type
Type of Distribution Media:
�TyPe t �]'[' {� -� Q��� ❑D2infield Rock Q Registered Treatrnent Media:
YPe � YP Q�YDe 1 V �]Type V
High Cap(12"Credit)Chambers
3. SITE EVALUATION:
A. Depth to Limiting Layer: 60 in 5.0 ft B. Measured Land Slope%: 25.0 %
C. Etevation of Limiting Layer:�— 85.0—� D. Soil Texture:� Sandy Loam
E. Loc.of Restricive Elevation: near B4(Boring Verification Site) F. Soil Hyd. Loading Rate: 0.78 GPD/ftz
G. Minimum Required Separation: 36 in 3.0 ft H. Perc Rate: 6 to 15 MPI
I. Code Maximum Depth of System: 24 in Comments:
4. DESIGN SUMMARY
Trench Design Summary
Dispersal Area 504 ftZ Sidewall Depth 12 in Trench Width 36 ft
Total Lineal Feet 16 ft Number of Trenches�� Code Maximum Trench Depth 24.0 in ,
Contour Loading Rate 1.2 ft Designer's Max Trench Depth 24.0 in
Bed Design Summary
Absorption Area��ftZ Depth of sidewall��in Code Maximum Bed Depth�in
Bed WidthC�ft Bed Length��ft Designer's Max Bed Depth�in
�;n��o �V . OSTP Design Summary Worksheet U1�IVERSITY
ia olfuturn
Cormol Agency OP MINNES4TA `':.r;;,;�,�,..
Mound Design Summary
Absorption Bed Area�ftz Bed Length�ft Bed Width�ft
Absorption Width�ft Clean Sand Lift�ft Berm Width (0-1%)�ft
Upslope Berm Width�ft Downslope Berm Width �ft Endslope Berm Width�ft
TotalSystem Length�ft TotalSystem Width�ft Contour Loading Rate��al/ft
At-Grade Design Summary
Absorption Bed Width�ft Absorption Bed Length�ft System Height�ft
Contour Loading RateC�gal/ft Upslope Berm Width�ft Downslope Berm Widih�ft
Endslope Berm WidthC�ft System Length�ft System Width�ft
Level&Equal Pressure Distribution Summary
No.of Perforated Laterals�� Perforation Spacing�ft Pertoration Diameter�in
Lateral DiameterC�in Min. Delivered Volume�Sal Maximum Delivered VolumeC�gal
Non-Level and Unequal Pressure Distribution Summary
Elevation Pipe Volume Pipe Length Perforation Size
(ft) Pipe Size(in) (gal/ft) (ft) (in) Spacing(ft) Spacing(in)
Lateral 1 Minimum Delivered Volume
Lateral 2
gal
Lateral 3
Lateral 4 Maximum Detivered Volume
Lateral 5
gal
Lateral 6
5. Additional info for Type IV/Pretreatment Design
A. Calculote the organic loading
1. Organic Loading to Pretreatment Unit =Design F(ow X Estimated BOD in mg/L in the effluent X 8.35=1,000,000
gpd X ��mg/L X 8.35=1,000,000= �lbs BOD/day
2. Type of Pretreatment Unit Being Installed:
3. Calculate Soil Treatment System Orgonic Loading: BOD concentration after pretreatment=Boitom Area =lbs/day/ftz
mg/L X 8.35=1,000,000 : ��ft2= �lbs/day/ftZ
Comments/Special Design Considerations:
I hereby certify that I have completed this work' acco c wit applicable ordinances,rules and laws.
t. Klanchnik � L 2656 Oct.20,2015
(Designer) nature) (License#) (Date)
� � OSTP Trench Design
'�"'� UN'IVERSITY
�'""��"t'��°��`��"" Worksheet OP MINNESOTA
Cantrol Agency *�,"'+.»
1. SYSTEM SIZING: ProjectlD: 10010007502C v 07.14.15
A. Design Flow: 450 GPD
B. Code Maximum Depth: 24 inches Designers Maximum Depth: 24.�inches
C. Soil Loading Rate: 0.78 GPD/ftz Contour Loading Rate: 1.2 gal/ft
D. Required Bottom Area: Design Flow(1.A)=Loading Rate (1.C)= Initiat Required Bottom Area
450 GPD= 0.78 GPD/ftZ = 577 ft2
E. Select Dispersal Media: C7 Rock
(selection required) �w T����stered Produ�t
F. Select Distribution Method: Q�ressure C!Gravity-Drap
C�Gravity-Other
G. If distribution media is instatted in contact with sandy or loamy sand or with a percolation rate of 0.1 to 5 mpi
indicate distribution or treatment method: Seriat distribution in 15%sections
2. TRENCH CONFIGURATION: ROCK
q, Initial required Sidewall Design
trench bottom area Absorption Bottom Area Bottom Area trench �
(ft2): (from 1.D (inches Reduction Multiplier
) ) bottom area ;�cti„��
6to11 �
� pistribuii4n
12 to 17 20% 0.8 �,.....`... ..
18 to 23 34% 0.66 �si�����
24 40% 0.6
�
B. Select Sidewall Height: �inches = �ft �.�.'"-•"`�..,'-`"--.�..'�"
Width
C. Design Bottom Area (2.A): C�ft2
D. Select Trench Width: ��ft
E. Total Designed Trench Length: Bottom Area :Trench Width =Totat Required Trench Length
��ff.2 =�� ft= ��ft
I. Calculate Minimum system length based on Contour Loading Rate: Design Flow :Contour Loading Rate =
�gpd :�gat/ft = �ft
F. Select No. of Trenches: C�trenches
G. Select Trench Spacing: ��ft (typically 5 - 12 ft from center to center)
H. Calculate Lawn Area: Trench Length (2.E)X Trench Spacing(2.G) =square feet of lawn area
�� ft X��ft = ��ftZ lawn area
J. Select Depth Required to Cover Distribution Pipe:
�]ft (0.33 ft for pressure, 0.5 ft for gravitY)
K. Calculate Rock Volume: (Sidewatl Height (2.6) + Depth to Cover Pipe (2.J))X Bottom Area (2.C) =cubic feet
( ��ft +��ft) X��ftZ =�_�ft3
Divide ft3 by 27 ft3/yd3 to catcutate cubic yards:
��f t3 - 27 = �_�Yd3
3. TRENCH CONFIGURATION: REGISTERED PRODUCTS-CHAMBERS AND EZFLOW
q, Initial required Sidewall Design
trench bottom area Absorption Bottom Area Bottom Area trench
(ftZ): (from 1.D) (inches) Reduction Muttiplier bottom area
6 to 11 1 577
12 to 17 20% 0.8 462
577
18 to 23 34% 0.66 381
24 40% 0.6 346
B. Registered Product: High Cap(12"Credit)Chambers
C. Select Sidewall Height: 12 inches = 1.0 ft
D. Design Bottom Area (3.A): 504 f�z
E. Registered Width: 36 ft
F. Minimum Designed Trench Length= Bottom Area (3.C) :Trench Width (3.D)
504 ftz = 36.0 ft= 14 ft
G. Enter the Registered Product Component Length: �ft
H. Number of Components=Minimum Total Length Required divided by Component Length (Round up)
14 ft: � ft= �components
I. Actual Total Trench Length=Number of Components X Component Length:
�components X 4.0 ft = 16 ft
J. Calculate Minimum length per trench based on Contour Loading Rate: Design Flow:CLR=
450.0 gpd : 1.2 gal/ft = 375.0 ft
K. Select No. of Trenches: �trenches
L. Length per trench=Actual Trench Length :Number of Trenches. Recommended to not exceed 3.J.
1b.0 ft: �gal/ft = 2.3 ft
M. Setect Trench Spacing : �ft (typicalty 5 - 12 ft from center to center)
N. Calculate Lawn Area:Trench Length X Trench Spacing =square feet of lawn area
16 ft X�ft = 112 ftz lawn area
Comments•
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—=_��INCH WIDE TRENCH
' OSTP Basic Pump Setection Design
Minnesota Pollut�n Worksh eet UN I V ERS ITY
Control Agency O� �INNESOTA � �`"�.,,-`'"`"
1. PUMP CAPACITY Project ID: 100100075020
Pumping to Gravity or Pressure D9stribution: Q crawty Q aressure Selection required
1. If pumping to gravity enter the gallon per minute of the pump: 20.0 GPM (10-45 qpm)
2. If pumping to a pressurized distribution system: �GPM
3. Enter pump description: Demand Dosing Soit Treatment
2. HEAD REQUIREMENTS ���d5�
A. Elevation Difference 18 ft �,..-�'' ,�
wos"�`�"�
between pump and point of discharge: -
�P��', �� levaiion�:-'
6. Distribution Head Loss: �ft
C. Additional Head Loss: C�ft(due to special equipment,etc.) ,
_ . ._�
i
T�abd�I.F`ri�Loss fn P�astft Pipe p�r tt�ft
Distribution He�eaf Loss Flow Rate Pi IItarr�eter(inchesl
Gravity Distribut9on = Oft
(GPM� t 1.25 T.5 � 2
__-__._......_.___ ._......._-....._._...__...._.....----....���....._...-----...._...__.
Pressure Distribution based on AAinimum Av�rage Nead 1p 9.1 3.1 1.3 0.3
Vatue on Pressure Distribution Warksheet: �2 1Z.8 4.3 '4 $ 0 4
Minirr�um Av�ra +e Head Di�taributian H�d Loss ?4 17.0 5.7 2.4 0.5
1ft 5ft 16 21.8 7.3 3.fl 0.7
2ft 6ft 18 9.'# 3.8 tJ.9
5ft 1i3ft 2� 11.1 �4.b S.1
25 96.8 6.9 [ 1.7
D. 1.Suppty Pipe Diameter: 2.0 in 3(� 23.5 4.7 2.4
35 12.4 3.2
2.Supply Pipe Length: 60 ft � .�� � � ,�
E. Friction Loss in Plastic Pipe per 100ft from Table I: '�5 2Q.5 5.d
5(3 b.t
Friction Loss= 1.12 ft per 100ft of pipe �5 7.3
60 $.S
p, Determine Equivalent Pipe length from pump discharge to soil dispersal area discharge b5 1p,p
point. Estimate by adding 25%to supply pipe length for fitting loss. Supply Pipe Length ��y ,�.� �
(D.2) X 1.25=Equivalent Pipe Length 75 13.0
60 ft X 1.25 = 75.0 ft �� ��'�
95 2�.1
G. Calculate Supply Friction Loss by multiplying Friction Loss Per f00ft (Line E)by the Equivalent Pipe Length (Line F)and divide by 100.
Supply Friction Loss=
1.12 ft per 100ft X 75.0 ft - 100 = 0.8 ft
H• Toto!Head requirement is the sum of the E(evation Difference (Line A),the Distribution Head Loss(Line B),Additional Head Loss(Line C),and
the Supply Friction Loss(Line G )
18.0 ft + �ft + ��ft + 0.8 ft = 18.8 ft
�__-�
3. PUMP SELECTION
A pump must be selected to deliver at least 20.Q GPM(Line 1 or Line 2)with at least �$,$ feet of total head.
Comments:
� `�,.; OSTP Pump Tank
Mi»nesaia Pollution UNIVERSITY
�„�,,�e��,, Design Worksheet o�M�rr�EsoTA F '�„`"-
DETERMINE TANK GAPACITY AND DIMENSIONS Project ID: 100100075020 v 07.14.15
1. A. Design Flow (Design Sum.1.4): 450 GPD
B. Min.required pump tank capacity: 450 Gal C.Recommended pump tank capacity: 1000 Gal
D. Pump tank description: � Demand to Grevity
MEASURED TANK CAPACITY(existing tanks):
2. A. Rectangle area=length(L)X Width(W)
Width
9Z ft X 4.5 ft = 41.4 ftZ
B• Cirde area=3.14r2(3.14 X radius X radius)
3.14 X ��2 ft = �ftZ �—T
Length
C. Calculate Gallons Per Inch. Multipty the area from t.A or 1.8, by 7.5 to determine the gallons per foot
the tank hotds and divide by 12 to calculate the gatlons per inch.
41.4 ft2 X 7.5 gal/ft' :12 in/ft = 25.9 Gallons per inch �—�►
Radiu
D. Calculate Totn!Tank Volume
Depth from bottom ofinlet pipe to tank bottom: 38.65 in
Total Tonk Vo(ume =Depth from bottom of inlet pipe (Line 4.A)X Go(lons/Inch (Line 2)
38.65 in X 25.9 Gatlons Per Inch= 1000.1 Gallons
MANUFACTURER'S SPECIFIED TANK CAPACITY(when available):
3. A. Tank Manufacturer: see installer Note:Design calculations are based on
this specific tonk.Substituting a
B. Tank Model: different tank mode!wi!(change the
� pump float or timer settings.Contact
C. Capacity from manufacturer: Gallons designer if changes are necessary.
D. Galtons per inch from manufacturer: �Gatlons per inch
E. Liquid depth of tank from manufacturer: �inches
DETERMINE DOSING VOLUME
4• Catculate Volume to Cover Pump (The intet of the pump must be at least 4-inches from the bottom of the pump
tank 8 2 inches of water covering the pump is recommended)
(Pump and btock height+2 inches)X Gallons Per Inch (2C or 3E)
( ZZ in + 2 inches) X 25.9 Galtons Per Inch = 621 Gallons
5. Minimum Delivered Volume = 4 X Volume of Distribution Piping:
-Line 17 of the Pressure Distribution or Line 11 of Non-(eve( �Galtons(minimum dose)
6. Calculate Moximum Pumpout Valume (25%of Design Flow)
Design Flow: 450 GPD X 0.25 = 113 Gallons(maximum dose)
7. Select a pumpout vo/ume that meets both Minimum and Maximum: 75 Gallons
$• Catculate Doses Per Day =Design Flow:Delivered Volume �r,�{���a�Lic�uid in
450 gpd= 75 gal = ��Doses �1
9. Calcutate Drainback: � '
A. DiameterofSupplyPipe= ��inches ��; �..�Qltf6)
dianne�er Per Foot
B. Length of Supply Pipe= ��feet {ThC�'S} {�d��Q1'IS�
C. Volume of Liquid Per lineal Foot of Pipe = 0.170 Galtons/ft .� Q.��
D. Drainback =Length of Supply Pipe X Volume of Liquid Per Lineol Foot of Pipe ,�.� O•��$
60 ft X 0.170 gdl/ft = 10.2 Gatlons
9.5 0.110
10. Total Dosing Volume =Delivered Volume ptus Drainback � � '70
�5 gat+ �o.z gal= as Gatlons 3 0.380
11. Minimum Atarm Volume=Depth of alarm(2 or 3 inches)X gallons per inch of tank
2 in X zs.9 4 0.6b1
��gdl/in = 51.8 Galtons
" � t;" OSTP Pump Tank
M�nnesaLa Potlution UAIIVERSITY
Cor�LroiAgency Design Worksheet or MzrrN�scrrA `�.`"
TIMER or DEMAND FLOAT SETTINGS
Select Timer or Demand Dosing: Q rmer QQ pemand�ose
A. Timer Settings
12. Required Flow Rate:
A. From Design(Line 12 of Pressure,Line 10 of Non-Level or line 6 of Pump'): � GPM
`Note: This volue must
B. Or calcutated:GPM=Change in Depth(in)x Gallons Per Inch/Time Interval in Minutes 6e odjusted after
�� in X � Bal/in: � min=� GPM installation based on
13. Flow Rate from Line 12.A or 12.8 above. � GPM Pump calibration.
14. Calculate TIMER ON setting:
Totol Dosing Volume/GPM
�� $dl: �� 8Pm= �Minutes ON I
15. Catculate TIMER OFF setting: �
Minutes Per Day(1440)/Doses Per Day- Minutes On
1440 min - ��doses/ddy - �min = �Minutes OFF
16. Pump Off Roat-Measuring from bottom of tank:
Distance to set Pump Off F(oot=Gotlons to Cover Pump /Gallons Per Inch:
�� gal: � 8al/in= �incnes
17. Alarm Float-Measuring from bottom of tank:
Distance to set Alarm F(oat=Tank Depth(4A)X 90%of Tank Depth
�� in X 0.90= �in
B. DEMAND DOSE FLOAT SETTiNGS
18. Calculate Floot Separation Distonce using Dosing Vo(ume.
Tota!Dosing Volume/Gallons Per Inch
85 gdl : 25.9 gal/in= 3.3 Inches
�9• Measuring from bottom of tank:
A. Distance to set Pump Off Floot=Pump+btock height+2 inches
ZZ in+ � in = 24 Inches
B. Distance to set Pump On Float=Distance to Set Pump-Off Flont +Float Separation Distance
24 jn+ 3.3 jn = 27 Inches
C. Distance to set Alarm Float=Distance to set Pump-On Floot +Alorm Depth (2-3 inches)
27 in+ 2.0 jn= 29 Inches
FLOAT SETTINGS
DEMAND DOSING TIMED DOSING
Inches for pose: 3.3 in
�--- �-
Alarm Depth 29.3 in Alarm Depth in
Pump On 27.3 in 51.75 Gat
Pump Off 24.0 �n 85 GaE . Pump Off ��
b21 �!
i
� LTr��v��s�T� �
��
�F l�INNE�C}TA
. ,.�.
��
Septic System Management Plan -� `
.1
for Below Grade Systems
The goal of a septic system is to protect human health and the environment by properly treating
wastewater before returning it to the environment. Your septic system is designed to kill harmful
organisms and remove pollutants before the water is recycled back into our lakes, streams and
groundwater.
This management plan will identify the operation and maintenance activities necessary to ensure
long-term performance of your septic system. Some of these activities must be performed by you, the
homeowner. Other tasks must be performed by a licensed septic maintainer or service provider.
However, it is YOUR responsibility to make sure all tasks get accomplished in a timely manner.
The University of Minnesota's Septic System Owner's Guide contains additionai tips and
recommendations designed to extend the effective life of your system and save you money over time.
Proper septic system design,installation,operation and maintenance means safe and clean water!
Prope�oWper Engel Properties, LLC. attn: Patti Engei
Prope�aaaress 3265 Lexington Ave S Eagan, MN Properry 1� 100100075020
System Designer T. Klanchnik Phone(612) 232-9737
System Installer Mulvihill Excavating Phone (612) 598-2455
Service Provider/Maintainer ;�` c-.�� '�
/�� l�-°�" ��df''� . Phone���` �� � /���
Pe�„�tt�ng author�Ty City of Eagan Phone (651) 675-5685
Permit# Date Inspected
Keep this Management Plan with your Septic System Owner's Guide. The Septic System
Owner's Guide includes a folder to hold maintenance records including pumping, inspection and
evaluation reports. Ask your septic professional to also:
• Attach permit information,designer drawings and as-builts of your system, if they are available.
• Keep copies of all pumping records and other maintenance and repair invoices with this document.
• Review this document with your maintenance professional at each visit;discuss any changes in product
use,activities,or water-use appliances.
For a copy of the Septic System Owner's Guide,call 1-800-876-8636 or go to http://shop.extension.umn.edu/
http://septic.umn.edu
Version 6/10/2010
- 1 -
UN�V ERS ITY Septic System Management Plan w
O�, ����.�SO,�� forBelow Grade Systems '����
Your Septic System
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Septic System Specifics
� System is subject to operating permit*
System Type:�. I�II �III�IV*�V* � System uses UV disinfection unit*
(Based on MN Rules Chapter 7080.2200—2400) Type of advanced treatment unit
*Additional Management Plan required
Dwelling Type Well Construction
Number of bedrooms: Three Well depth(ft): City Water
System capacity/design flow(gpd): 450 Cased well Casing depth: N/A
Anticipated average daily flow(gpd): 270 Other(specify): N/A
Comments Converted to Office Space(reduced use) Distance from septic(ft):N/A
Business?❑What type? Is the well on the design drawing?�Y � N
Septic Tank
� One tank Tank volume: 1500 gallons � Pump Tank(if one) 1000 gallons
Does tank have two compartments.`�YQN � Effluent Pump make/model:W�Alarm
Two tanks Tank volume: gallons Pump capacity 20 GPM
❑ Tank is constructed of Concrete TDH �8•8 Feet of head
❑ Effluent Screen rype: N�! ❑ Alarm location Both Indoor&Outdoor
Soil Treatment Area(STA)
Trenches: 168 total lineal feet � Gravity distribution Pressure
Number of trenches: � at 24 feet each distribution
STA size(width x length): 27 ft x 52 ft �
Inspection ports Cleanouts
Location of additional STA: ✓ Additional STA not availabie
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U�j�lERS�`�`� Septic System Management Plan ,�
OF MINNESQTA .f�rBelow Grade Systems
�,��
Homeowner Management Tasks
These operation and maintenance activities are your responsibility. Use the chart on page 6 to
track your activities.
Identify the service intervals recommended by your system designer and your local government.
The tank assessment for your system will be the shortest interval of these three intervals. Your
pumper/maintainer will determine if your tank needs to be pumped.
System Designer: check every 36 months
My tank needs to be checked
Local Government: check every 36 months
State Requirement: check every 36 months
every 36 months
Seasonally or several times per year
• Leaks. Check(listen,look)for leaks in toilets and dripping faucets. Repair leaks promptly.
• Surfacing sewage. Regularly check for wet or spongy soil around your soil treatment area. If
surfaced sewage or strong odors are not corrected by pumping the tank or fixing broken caps and
leaks,call your service professional. Untreated sewage may make humans and animals sick.
• Alarms. Alarms signal when there is a problem; contact your maintainer any time the alarm
signals.
• Lint filter. If you have a lint filter, check for lint buildup and clean when necessary. Consider
adding one after washing machine.
• Effluent screen. If you do not have one, consider having one installed the next time the tank is
cleaned.
Annually
• Water usage rate. A water meter can be used to monitor your average daily water use. Compare
your water usage rate to the design flow of your system (listed on the next page). Contact your
septic professional if your average daily flow over the course of a month exceeds 70% of the
design flow for your system.
• Caps. Make sure that all caps and lids are intact and in place. Inspect for damaged caps at least
every fall. Fix or replace damaged caps before winter to help prevent freezing issues.
• Water conditioning devices. See Page 5 for a list of devices. When possible,program the recharge
frequency based on water demand (gallons) rather than time (days). Recharging too frequently
may negatively impact your septic system.
• Review your water usage rate. Review the Water Use Appliance chart on Page 5. Discuss any
major changes with your pumper/maintainer.
During each visit by a pumper/maintainer
• Ask if your pumper/maintainer is licensed in Minnesota.
• Make sure that your pumper/maintainer services the tank through the manhole.(NOT though a 4"
or 6"diameter inspection port.)
• Ask your pumper/maintainer to accomplish the tasks listed on the Professional Tasks on Page 4.
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�N I V ERS ITY Septic System Management Plan � ,° �
OF NIINNESaTA .for Below Grade Systems ��
� :;�� _
Professional Management Tasks � �
These are the operation and maintenance activities that a pumper/maintainer performs to help ensure
long-term performance of your system. Professionals should refer to the O/M Manual for detailed
checklists for tanks,pumps, alarms and other components. Call 800-322-8642 for more details.
• Written record provided to homeowner after each visit.
Plumbing/Source of Wastewater
• Review the Water Use Appliance Chart on Page 5 with homeowner. Discuss any changes in
water use and the impact those changes may have on the septic system.
• Review water usage rates(if available)with homeowner.
Septic TanWPump Tanks
• Manhole lid. A riser is recommended if the lid is not accessible from the ground surface. Insulate
the riser cover for frost protection.
• Liquid level. Check to make sure the tank is not leaking. The liyuid level should be level with the
bottom of the outlet pipe. (If the water level is below the bottom of the outlet pipe,the tank may
not be watertight. If the water level is higher than the bottom of the outlet pipe of the tank, the
effluent screen may need cleaning,or there may be ponding in the drainfield.)
• Inspection pipes.Replace damaged caps.
• Baffles. Check to make sure they are in place and attached, and that inlet/outlet baffles are clear
of buildup or obstructions.
• Effluent screen. Check to make sure it is in place; clean per manufacturer recommendation.
Recommend retrofitted installation if one is not present.
• Alarm. Verify that the alarm works.
• Scum and sludge. Measure scum and sludge in each compartment of each septic and pump tank,
pump if needed.
Pump
• Pump and controls. Check to ma.ke sure the pump and controls are operating correctly.
• Pump vault. Check to make sure it is in place;clean per manufacturer recommendations.
• Alarm.Verify that the alarm works.
• Drainback. Check to make sure it is operating properly.
• Event counter or run time. Check to see if there is an event counter or run time log for the pump.
If there is one, calculate the water usage rate and compare to the anticipated average daily flow
listed on Page 2.
Soil Treatment Area
• Inspection pipes. Check to make sure they are properly capped.Replace caps that are damaged.
• Surfacing of effluent. Check for surfaced effluent or other signs of problems.
• Graviry trenches and beds. Check the number of gravity trenches with ponded effluent. Identify
the percentage of the system in use.Determine if action is needed.
• Pressure trenches and beds -Lateral flushing. Check lateral distribution; if cleanouts exist, flush
and clean as needed.
All other components—inspect as listed here:
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R
CJ�IIVERSIfiY Septic System Management Plan ��
4F MINNES4TA .for Below Grade Systems §�
Water-Use Appliances and M��
Equipment in the Home
Appliance Impacts on System Management Tips
• Uses additional water. • Use of a garbage disposal is not recommended.
• Adds solids to the tank. • Minimize garbage disposal use.Compost instead.
Garbage disposal . Finely-ground solids may not settle. • To prevent solids from exiting the tank,have your
Unsettled solids can exit the tank tank pumped more frequently.
and enter the soil treatment area. . Add an effluent screen to your tank.
• Washing several loads on one day • Choose a front-loader or water-saving top-loader,
uses a lot of water and may overload these units use less water than older models.
your system. . Limit the addition of extra solids to your tank by
• Overloading your system may using liquid or easily biodegradable detergents.
Washing machine Prevent solids from settling out in . Install a lint filter after the washer and an effluent
the tank.Unsettled solids can exit screen to your tank
the tank and enter the soil treatment � Wash only full loads.
area. . Limit use of bleach-based detergents.
• Think even—spread your laundry loads throughout
the week.
• The rapid speed of water entering • Install an effluent screen in the septic tank to prevent
2"a floor laundry the tank may reduce performance. the release of excessive solids to the soil treatrnent
area.
• Be sure that you have adequate tank capacity.
• Powdered and/or high-phosphorus • Use gel detergents. Powdered detergents may add
detergents can negatively impact the solids to the tank.
Dishwasher performance of your tank and soil . Use detergents that are low or no-phosphorus.
treatment area. . Wash only fvll loads.
• New models promote"no scraping". � Scrape your dishes anyways to keep undigested
They have a garbage disposal inside. solids out of your septic system.
• Finely-ground solids may not settle. • Expand septic tank capaciTy by a factor of 1.5.
Grinder pump(in Unsettled solids can exit the tank . Include pump monitoring in your maintenance I
home) and enter the soil treatment area. schedule to ensure that it is working properly.
• Add an effluent screen.
• Large volume of water may • Avoid using other water-use appliances at the same
Large bathtub overload your system. time.For example,don't wash clothes and take a
(whirlpool) • Heavy use of bath oils and soaps can bath at the same time.
impact biological activity in your . Use oils,soaps,and cleaners in the bath or shower
tank and soil treatment area. sparingly.
Clean Water Uses Impacts on System Management Tips
High-efficiency • Drip may result in frozen pipes • Re-route water into a sump pump or directly out of
furnace during cold weather. the house.Do not route furnace recharge to your
septic system.
Water softener • Salt in recharge water may affect • These sources produce water that is not sewage and
Iron filter system performance. should not go into your septic system.
Reverse osmosis • Recharge water may hydraulically . Reroute water from these sources to another outlet,
overload the system. such as a dry weil,draintile or old drainfield.
• Water from these sources will likely • When replacing,consider using a demand-based
Surface drainage overload the system. recharge vs.a time-based recharge.
Footing drains . Check valves to ensure proper operation;ha�e unit
serviced per manufactwer directions
- 5 -
�
"` i
UN I V ERS YT'Y Septic S�ste�ra;�t�.�nc�gertaerrt Plrzn
for BeIU���(.;�•ac�e,Si•:ste�rrs `•''
OF M�NNESOTA
�-�-�,'
Maintenance Log
Trr�ck ntaintetturree uctivities ltere tr�r eas�•re�}er�tace.�ee lisr t�,f�>nanag�►rterrt tasks on pages 3arad-�.
� AcCivit,y �
� DaYe a�rnmpl�s�ed
Chech freguentiv:
L�aks:check for pl�mbing leaks � � I E � (
� ; � �
Sail treatrnent area checl: ft�r surfac�n� � ! i � �
� !
L.I int filtar:checE:.clean if need�d �
� � i �
E:ffluettC screen: if o�a�ner-maintain�d ;
r i
�
Clreck rzrrnuall3�:
�'�at�r usa�e rai��manitor frequEncy._..) �
ICaps::nspect,c�place if nceded � � ;
� Water use applianc�s—review�use 1 � � �
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I''1 _Mana�ernent Plan Prepar�ct Bv: T• �IanChCllk Certitication# � �945
Permittin�Authorit-: Glt�/ pf Eaga�
��>_'�}I6 Regen[s of ifie Univers�a�n!4finne.�oc�, .iPr rrghrs re.sen•ed. 7'he�nce�an�n�of Mrnnesota is an�qual aFP�ttunin�edu%ainr and emplayer.
This rnateriat�s availabi�in sitemaqae torniats upon ret�ucst. Consact ihe W;t[er Resnurces Cen[er.b12-&�qA:$2. Tho pnsrte Seti��age
Treaament Pro�ram is deliverzd bv the Uri{versity af 1�11nnesota�ra�nsion Sen�ice and ihe tiniversity af Minnesotn 4�r���Resources Center
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