HomeMy WebLinkAboutSeptic System Approval • CITY OF ORONO Permit #
SEPTIC SYSTEM APPROVAL Fee $
Entered By
The General Contractor will be given a copy of this report and is
responsible for its distribution
AS APPROVEDoall IINLESSuTHIS SggETtISsATTACHEDC SYSTEM
DESIGN IS NOT CONSIDERED
LOCATION:
PHONE:
GENERAL CONTRACTOR:
PHONE:
SEPTIC CONTRACTOR:
PHONE
OWNER:
[1 PPROVED
CONDITIONALLY APPROVED: (Note Changes Below)
COMMENTS:
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NOTICE TO INSTALLERS: Any changes to
Call apninspections 24 hoursroved plans and pensadvancmuste ave prior
approval of the Inspector (473-7357).
NOTICE TO GENERAL CONTRACTORS: Primary and alternate drainfield sites MUST be protected
prior to and after system installation to avoid compaction of the natural soil.
LT,�,�r, AREAS MUST RE ggNr� O prior to building site excavation and fencing must
remain in place until final site grading. Approval to pour footings wall not be granted
until the Inspections Department has verified that primary and alternate sites are
adequately protected.
PO VEHICULAR TRAFFIC OF ANY KIND (cars, trucks, earth moving equipment, etc.) is allowed
system .
within 2of tested
are workingon
sites
either before or after
ion
his
t loy
o the lot you all adjacent lots. You couldcbesheldtliableTfor
applies t
damaging sites on neighboring lots.
SOIL COMPACTION, RENDERING DRAINFIELD SITES UNUSABLE.
VEHICIILAR TRAFFIC CAN CAUSE -
Evidence of traffic on drainfield sites may be cause for revocation of building p
Damaged alternate sites must be replaced before a Certificate of Occupancy wil 1 be issued.
Date Appro ed By *Cyf O ono
S. TESTING, INC. Steven B. Schirmers — MPCA Cert. No. 627
951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566
August 2, 1992
Richard Perry
440 Willow Dr-So.
Orono, Henn. Co. , MN
A site Evaluation was completed on this property for On-Site Sewage
Treatment for a Type 1, three bedroom home.
This site has an existing failing system due to being too small &
in a seasonally high water table at 34" to 40" deep. To adequately
treat septic effluent, a Pressurized Mound System would need to be
installed. This site has very limited space with no available area
for a mound system. The only system that will meet codes would be
holding tanks with the effluent hauled off site. At today' s prices,
this will cost approx. $3600.00 to $4000. 00 a year with low water
use facilities installed throughout the house.
A request for an alternative system is needed. A Class 1 Aerobic
Treatment system, Multi-Flo Wastewater Treatment system is available
with shallow trenches 18" deep with 12" of cover over the rock with
approx. 600 to 700sq.ft. available. The system requires to be
serviced 2 times a year. A 2 year service contract comes with the
purchase of the unit. After the 2 year period, the home owner will
be required to carry a service contract at a cost of $100.00yr.
(1992 ' s price) with a report to the City, MPCA, Multi-Flo & the
Home Owner. The Multi-Flo unit will be model FTB0. 5. These
treatment system treat the BOD & TSS with a removal of 96% to 98%
& virus removal is greater than 99%. To install the Multi-Flo
unit, a lift pump will be needed in the lower level to keep the
tanks shallow. A 500 to 750 gallon septic tank will need to be
installed as a trash trap ahead of the unit.
All neighboring wells are located greater than 75 ' away from the
proposed treatment area.
Keep all heavy equipment off of the proposed treatment area before and
after construction. The treatment area should be marked off before
construction. This Design is not valid & the System will need to
be relocated if failure to protect the areas proposed for On-Site
Sewage Treatment occurs.
Nothing other than gray water, (laundry, showers, etc. ) human
waste & toilet tissue should be disposed of into the septic tanks.
Garbage disposals are not recommended. Additives must not be used,
they may cause harmful damage to your septic system.
'Steven B. Schirmers D5
smS/ds
�-.
CITY' 0
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BU1LDt�d L REV X X 'P�o�os�-� %.o f
E}37S'hNl� 't O, s --
MSPECTOP2 �( w&Ll �aahb�o
S aO qal.'��1 SW-
DATE — PERMIT NO.
APPROVED AS SU `✓!iiTED
�=r.
APPROV=i? �-dfTN CORRECTIONS AS NOTED --------------
❑ NOT APPROVED CORRECT & RESUBMIT A——_,
These comments are for you information. All workshall be done
In full compilance with all afkAlcable bufiding & zontrig oode re.
Quirements including items t specifically noted in this revfeyt, ,i !
•I KEEP THIS PLAN SE ON SITE AT ALL TI ES.'
43 i
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5 \ x
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I - � \\ >��ca- ciao sa,F-c'_ > f•.
I {AV/ X �Y x
PROPERTY
inn. :2P nI A
rL ,TRA-/ HiR S Percolation Tests Scale OF 1<_�1 dim -L
;1,4' A,'nvC XSoil Borings -
E/_- lGD•00 0 Bench Mork c)y-f""\C
Note: This system is to be constructed to meet
the Minnesota Pollution Control Agency S-P 4-SUNG INC.,,'
Chapter 7080 & Local Ordinance -� - 1.. l- ,
Designed By-- �' c , it
Note Check all underground utilities Date:�//`�V PH.62-497-3565
- Ho .
exiotm 9r
bock fill e'mlr►
cr}4 0��- L> -ro Stoo'layer of umompocted- _0- ^ ��� hay orstraw covered withpipe coo.�
- - �,Ip�w. _ - . �� red rosin paper r
.Nv
13'rock filter material
SET- BACKS L_ e-e P-Nyol_ rake sidewalls 81 bottom to
HOUSE System must be; 'PV-CT V_or�& remove smearing
Tank from property lines
from wells _
_LQ from Wdgs�t TRENCH X-SECTION
-°`"�*'�- "�- Yw` (min. of two trenches)
Treatment area _v from property fines(1 o r � (max. length 100')
W000Los-mAx. 2. from wells
4--r koasC_ VoF dace N LQ:from bldgs.
- 94. C - 1S2'from trees SOIL BORING ELEVATIONS
from to es a streorns_ least 4 V2 of undisturbed earth
.Lsz min. . -,q,�� tri3rrclies TH"I EL.
....tet.. �`99.0
TH-2 EL.
�•-- -
TankTank t_: Ir E- S Grade_°/a slope TH�3 EL.- .�
_Oros to Tonk $O" ,► "-re, FLou� ���1�- TH�4 EL-92sS
Min.('10 8' q .o TH`5 EL
Max I'too' DROP BOXES
4„to 6"ilia. �
pipe 4Q�1 N o o u r)-?•-v1 P Ar IF L-\--
SYSTEM DESIGN
TYPE-g-,3 BEDROOM - Percolation rate H.c� min./inch (designI�_min./inch) W s f-iI 0. .< L5,00 gal "o -t
Treatment area required w/.Z of rock fiNer material -=* /o =.La sq.ft. of trench bottom area needed = trench width= lh ft.of trench needed , nurrrber of drop bows
(to be determined by the installer)
Number of tanks required , Ist tank 9 o 0 gal,, 2nd tont- dal. mininxims
T� `.-C 1- -o
$op�9�,1 -
Cleon rock 31 cu.yds. ( 3/4" to 2 1/2”dio.,includes 2"above pipe) a a n .. 3 PROPERTY OF:V/A AY a ?�P y
fo�n1. t+ 1 1►-f �d G.'/ l U IL1,b
UL)
M ij
�xa►�Ua•ti oM�3cY'CH '" _.')S 3t�_�'__� .
J
s _ S—P TEST/NG /N .
c�'C�E-( 1}1JG�T _ bpi 31y '
Note: When constructing trenches , this area should be shaped Note= Distance from treatment area to neighboring wells— Designed By:�ZL 03, ,
io divert run-off from entering treatment area. ' A �S� Date
PH. 612-497-3566
•�' INDIVIDUAL SEWAGE TREATMENT SYSTEM WORKSHEET '
FLOW Estimated Sewage Flows in Gallons per day
A. Estimated '-i-!9,0 gpd (gpd)
n measured x 1.5= gpd Number
SEPTIC TANK VOLUME of Type I Type 11 Type M Type
B. 1 - So gallons-TVr�sVa -c"v il P Bedrooms l�
2 300 225 190
SOILS(Site evaluation data) 219 0%
4 4650 370%
256 611'sC. Depth to restricting layer= 34 --b -10 feet- 5 750 450 294 in
D. Maximum depth of system C-3 ft= I • 55 feet 6 900 525 332 'r t.
E. Percolation rate 9 . 01 MPI LSU ,Lc —Y" g 12000 6670 37 a.io
�. t.ta
F. Soil Sizing Factor .a sq ft/gpd(See table 3)
TRENCH BOT'T'OM AREA
H. For trenches with 6 inches of rock below the pipe: sepete Tank Crlaeltie�,it ealleaa
A x F= x = eq ft of bottom area Number Min�tt.sa0id saa�sle capacity �
I. For trenches with 12 inches of rock below the pipe:
A x F-x 0.8=14--�o x_2.L x 0.8==sq ft of bottom area(.a �'�'K 2 or t«: 750 .1125
J. For trenches with 18 inches of rock below the pipe: 4 or 6 1500 12'250
A x F x 0.66= x x 0.66=,sq ft of bottom area 7.8 or 9 2000. 30°°
K. For trenches with 24 inches of rock below the pipe:
AxFx0.6= x x0.6= sgftofbottomarea
BED BOTTOM AREA
L. For seepage beds with 6 or 12 inches of rock below the.pipe;
1.5 x A x F=1 S x x = sq ft of bottom area Sall Charaetartstles and Ralalred Amus
rar Sewage Treatment
ROCK VOLUME IN CU IT PamWm Rata in squaw oma.
M. Rock depth below distribution pipe plus 05 foot times bottom area: Miinm= tnah SWTexme raw par per my `
-� M=Rock depth(ft)+6 inches x Area (H,1,J,L or K) a•da per agww
(ltd ft+0.5ft)x6qL= °►3D cu ft
Fonar thin OJ• Carsa Sand
ROCK VOLUME IN CU YDS 0.1 w5 Sand 0.9 _
3 1.20
N. Volume in cu ft divided by 27
0.1 o lS lad,isnida.m 1'277:67 0."
M+27=cuyds�+27= cu yds 31ttoo45 sikt�.a.tn "(2.00 0 o
ROCK WEIGHT 46 to 60 Cls t.oam � 0.45
O. Cubic yards times 1 A=tons away than 60•« �1.r -- •---
Nx1.4=tons�xl.4=tons
DISTRIBUTION
(Check one based on slope) T
) r•r•r•r•r. . . . . . . ..
Trenches r
Bed(less than 696 slope •� •..ti.ti•ti•ti•ti•ti•ti•ti•ti•ti•+•
r r•r r•r•r r r r r r r2incht over
.;ti ti {ti.
Trenches r r•r.r•rrrrrrrrr
.ti.ti ti ti ti.
r•r•r•�• r;r•r•r•r
Drop boxes(any slope) ,tirti;tirti �rtirtirtir
Distribution box(level to slightly sloping) r•r•f• f•f•f•r 4 inch Pipe
,. t.
r•r.r. r•r•r+r
TRENCH LENGTH •tirtirtirtirti• rtir•r.r•r
L•ti•.`•
r•r•r•r•r•r•�•r•r•r•r•r•r
P. Select trench widthto _ft .''.`+`.`•'`.�.� `.'•`•'•~•�• ��
r•r•r•r•r•r•r•r•r•r•r•r•r
ti•ti•ti•'L•ti•L•ti•ti•ti•M1•5�•t•4•
Q. Divide bottom area by trench width: (H,1,1 J or K) P f•r•r.r•r•r•r•r•r•r•r.r.r•r
r•r•r•r•r•r•r•r•r•r•r•l•r 6-24 Inch
•ti•ti ti ti•4.1•S•L•�.•1•ti•ti•4•
lineal feet r•r•r•r•r•r•r•r•r•r•r•r•r Rock Below the Pi
r•r•r+r•r.r•r•r.r•r•r•r•r i
(�+.�'.�,=lineal feet •:•~ -~ ~•~.~•~.~•~.~•:'~•
r•r•r•f•r•r•r•r•r•r•r r•r
LAWN AREA •�•�•�•+.ti.ti.ti.ti.ti.ti.•..ti•ti.
r•r•r•r•r•t•r•r•r•r•r r•r
••�.ti,.yt 1.•1•�•'1.•ti•1.1•ti•'ti•
R. Select trench spacing,center to center as feet •r•r•r•r•r•r•r•r•r•r.r•r•r
S. Multiply trench spacing by lineal feet R x Q=sq ft of lawn area
x =-._,_sq f t
LAYOUT(Use other side)
1.Select an appropriate scale;one square= feet.
2.Show pertinent property boundaries,right-of-way,easements.
3.Show location of house,garage,driveway,and all other
improvements, existing or proposed
4.Show locnHon and layout of sewage treatment system.
5.Show location of water supply well.
6.Dimension all se!backs and separallon disiances.
SURGE BOWL
FILTER
O
INLET �O OUTLET
O Q FILTER HANGER
ACCESS
O Q
COVER I EFFLUENT
WEIR
PLAN VIEW ACCESS COVER
ACCESS COVER
DOME ASSY.
'OWER SUPPLY
CABLE GRADE
4"P.V.C.
CABLE TO 17 SURGE BOWL OUTLET
ALARM BOX
4"P,V.C. 4"P.V.C.OUTLET
INLET I
EFFLUENT WEIR W. BASIN
753/4"
FILTER TUBES
J U UU
SU;3MERSIBLE OUTLET END ELEVATION
A .SATORLL. DAYTW(M10
500 GPD mvvi°" WAW
oars vn/es
ELEVATION SECTION Multi-Flo Unit my
oiuwra►�s�
A-1018
L-13
CERTIFICATION # 00627 Logs of Soil Borings
Location or Project Richard Perry, 440 Willow Dr.So.-, Orono
Borings made by S-P Testing, Inc. Steve Schirmers Date - 7-20-92
Classifiction System: AASHO USDA-SCS X Unified ; Other
Auger used (check two) : Hand X , or Power , Flight , or Bucket X .
Depth, Boring number 1 Depth, Boring number 2
in in
feet Surface elevation 96.7 feet Surface elevation 98.0
0 .- 0 -
Topsoil dark brown Topsoil dark brown
loam 0 - 10" loam
1 0 - 1' 1 -
Brown clay loam
l' - 21 Brown clay loam
Brown loam
2' - 2110"-MOTTLED-2' 10" 10" - 3 ' -MOTTLED - 3 '
3 ,- 3 Rusty olive brown clay loam
3 ' - 3-1/2 '
4 - 4 -
Rusty olive brown
loam
5 _ 5 _ Rusty olive brown
loam
6 - 6 -
7 - 2110"- 7 ' 7 -
8 .. 8 - 3-1/2 ' - 8 '
End of boring at 71 feet. End of boring at 8 ' feet.
Standing water table: Standing water table:
present at feet of depth, present at feet of depth,
hours after boring. hours after boring.
Not present in hole X Not present in hole X
Mottled soil : Mottled soil :
Observed at 2 ' 10" feet of depth. Observed at 3 ' feet of depth.
Not present in hole Not present in hole
Comments: Comments:
L-13
•r,ERTIFICATION # 00627 Logs of Soil Borings
Location or Project Richard Perry, 440 Willow Dr.So. , Orono
Borings made by S-P Testinq, Inc. Steve Schirmers Date 7-20-92
Classifiction System: AASHO USDA-SCS X ; Unified ; Other
Auger used (check two) : Hand X , or. Power , Flight , or Bucket X
Depth, Boring number 3 Depth, Boring number 4
in in
feet Surface elevation 96 feet Surface elevation 9'7.5
0 -
Topsoil dark brown Topsoil dark brown
loam loam
1 � 1
0 - 1-1/2 ' 0 _ 1' 4"
2 _ Brown clay loam 2 - Brown clay loam
114" - 2-1/2'
1-1/2 ' 31-MOTTLED 31 3 _ Brown loam
Rusty olive brown 2-1/2 ' - 314"-MOTTLED
clay loam
4 - 3 ' - 412" 4 -
Rusty olive brown
5 .- loam 5 Rusty olive brown
loam 1
6 - 412" _ 6 ' 6 -
7 - 7 -
8 8 _ 314" _ 81
End of boring at 6' feet. End of boring at 8 ' feet.
Standing water table: Standing water table:
present at feet of depth, present at feet of depth,
hours after boring. hours after boring.
Not present in hole X Not present in hole X
Mottled soil : Mottled soil.:
Observed at 3 '. feet- of depth. Observed at 314" feet of depth.
Not present in hole Not present in hole
Comments: domments :
t •
CERT.#00627
PERCOLATION TEST DATA SHEET
S-P Testing, Inc. 7-21-92 12:16 a.M.
Percolation test readings made by --on Matting a
440 Willow Dr. So. 1 'd°"' 7-2
Test hole locatio" ,Hole number ,Date hole was prepare
Depth of hole botto"+ 18 inches,Diameter of hole 6 inches
Soil data from test hole:
Depth,inches Soil texture
0 - 12" Topsoil dark brown loam
12" - 18" Brown clay loam
i
Method of scratching sidewall Knife
Depth of gravel in bottom of hole 2 inches
7-20-92 1:30pm 12
Date and hour of initial water filling ,Depth of initial water filling inches above hole bottom
Method used to maintain at least 12 inches of water depth in hole for at least 4 hours Automatic siphon
Maximum water depth above hole bottom during test 6 inches
Time Percolation
Time interval, Measurement, Drop in water , rate, Remarks '
minutes inches level,inches minutes per
inch
• 12:05 prefill 6
12:16 12: 31 3-11/16 4.1 15 min
12:38 12: 53 3-7/16 4.4 "
12:54 1:09 3-1/4 4.6 "
Percolation rate = 4. 4 minutes per inch.
I '
CERT.#00627
PERCOLATION TEST DATA SHEET
92 21
, Inc.tin — .
Percolation test readings made by S—P TEsting, on 7— starting at 12: 17 a.m.
��
Wait) .
Test hole location 440 Willow Dr. so. ,Hole number. 2 ,Date hole was prepared 7-20-92 :
Depth of hole bottom 24 inches,Diameter of hole 6 inches
Soil data from test hole:
Depth,inches Soil texture
0 — 1011 . Topsoil dark brown loam
10" — 12" Brown clay loam
Method of scratching sidewall Knife
Depth of gravel in bottom of hole 2 inches
7-20-92 1:30pm 12
Date and hour of initial water filling ,Depth of initial water filling inches above hole bottom
Method used to maintain at least 12 inches of water depth in hole for at least 4 hours Automatic siphon
Maximum water depth above hole bottom during test 6 inches
Time Percolation
Time interval, Measurement, Drop in water rate, Remarks `
minutes 'inches level,inches minutes per
inch
12.05 prefill 6
12:17 12:32 3-1/2 4.3 15 min
12:37 12:52 3-1/4 - 4.6 to "
12: 55 1: 10 " 3-1/8 4.8 "
Percolation rate — 4. 6 minutes per inch.
I
CERT.#00627
PERCOLATION TEST DATA SHEET
INc.
Percolation test readings made by S—P Testing, ten. 7-21-92 starting at 12:18
(date)
Test hole location 440 Willow -Dr. S o. ,Hole number. 3 ,Date hole was preparers 7-20-92
Depth of hole botto"+ 24 inches,Diameter of hole 6 inches
Soil data from test hole:
Depth,inches Soil texture
n — 1R" Tnpenil dark hrnwn lnam
18" — 2,4" Brown clay loam
Method of scratching sidewall Knife
2
Depth of gravel in bottom of hole inches
Date and hour of initial water fillip 7—2 0—9 2, •33 0 m . 12
g ) pth o�tnttial water filling inches above hole bottom
Method used to maintain at least 12 inches of water depth in hole for at least 4 hours Automatic siphon
Maximum water depth above hole bottom during test 6 inches ..
Time Percolation
Time interval, Measurement, Drop in water rate, Remarks '
minutes inches level,inches minutes per
inch
• 12 :05 prefill 6
12: 18 12: 33 of3-3/16 4.7 15 min
12:36 12: 51 of 3-1/8 4.8 of it
12:56 1: 11 3-1/8 4.8 "
Percolation rate : 4.8 ■minutes per inch.
CERT.#00627
PERCOLATION TEST DATA SHEET
S—P Testing, Inc. 7-21-92 12:19 a.m. .
Percolation test readings made by o� starting at p.m. •
440 Willow Dr. so. •
(date)4 7-20-92
Test hole location ,Hole number ,Date hole was prepared_ • .
Depth of hole bottom----18 inches,Diameter of hole 6 inches
Soil data from test hole:
Depth,inches Soil texture
0 - 16" Topsoil dark brown loam
16" - 18" Brown clay loam
Method of scratching sidewall KN i f P
Depth of gravel in bottom of hole 2 inches ._
7-20-92 1: 30pm 12
Date and hour of initial water filling. ,Depth of initial water filling inches above hole bottom
Method used to maintain at lc. 12 inches of water depth in hole for at least 4 hours A i t nma t i e G i ph nn
Maximum water depth above hole bottom during teSL 6 inches
Time Percolation
Time interval, Measurement, Drop in water rate, Remarks `
minutes inches level,inches minutes per
inch
j2e19 12: 34 5.7 15 min
12: 35 12.- 50 " — 2 6.0
• 5 " 6.0
Percolation rate = 5 .9 minutes per inch.
vvoft
PA
-' •.!��..L'y. —r---MOUND FILL ,•-B'
`�•{:;. � TO ALLOW FOR
SETTLING
r:.\� .t } ," • -- f GRASS COVER
COVER ABOVE ROCK
+fr z _ ,•t��'"y! `•� -- '�---0 3A'TO 2IR' DIA.
ir AN
.l •r' '.�a' ,`.. 1: ��+i �: i CLEROCK
mmm� FA
1'-8' LAYER OF UNCOMPACT
O<D� '•+: . : HAY OR STRAW COVERED WITH
CZ
REO ROSIN PAPER OR GEOTEXTKE FABRICr---_----- `^ t.. 151tJR .S' ..c ��—
' / —TRENdI BOTTOM MUST BE LEVEL
oz
THROUGHOUT LENGTH
MINIMUM ROCK COVER ABOVE PIPE
p p ----8'MINIMUM ROCK DEPTH BELOW PIPE
-- --�~ i-- C 24' MAXIMUM ROCK DEPTH SLOW PIPE
C
mm v,C mlrl ��� 1 L__--�� I --1' DIA.RIGID PERFORATED PLASTIC PIPE WITH ONE ROW OF
# y+ n-1 a0 a n� ��`♦ C 1 �/ MOLES ALONG BOTTOM
f m7 O ( vX< O� �� I ��/� --WATER TABLE OR MIPERVIOUS LAYER SUCH AS CLAYPAN.ROCK. ETC.
r-r"
O ?f'
x ` ul-I m=z C�� y ,orzsr, v� TRENCH ROCK COVERED•WITH PERMEANLS
r6
s3 X m r-aQ Z �< E r PIPE TO NEXT STNRTNNETCIpVEREp W TH4 W(TREATED NUI(OIN6 Y OR
1'DIAMETER iN5PEC710N
,AA -1 a i O C=.^li� Tza 0 1� INLET DROP X PAPER (REO ROSIN WELL WITH CAP
= p 2«m � mi
°m n��O n m02 ?w EARTH BACKFILL AT L T
v►
0--n F a v a + 6 ABOVE TOP OF ROCK
v ay tD1 y/
--� z 4 0
D m _
I 4'< O m m 7� to p
-� X=� m-O EX2 AT LEAST 8' DEPTH OF CLEAN
OC < nT04x p'm v Z ` ! ROCK S/� TO 21/=DIA. SEE NOTE & •
X-4 ac g omr <� o •
rn2c m m -+ DROP BOX
m 1-4 zDni�p -�mD L MAXIMUM LENGTH • 100 FEET
-r--•---�-i- i 0-<am Tm� > H
s O 'Irn no :50 CD -1
Z N Oammr. ZcOC r OVERFILL NOTES* 1. BOTTOM OF TRENCH MUST BE LEVEL. TOP OF TRENCH
O ` c N CY "0", 4N� D �4 TO B INCHES ROCK MUST BE LEVEL.
C a m p 'Ir �~a� r-Ir —�_ __.__iNSyPECILTION 2. SLOP ON OISTRtBUT1pN PIp� S BETWEEN
2r < m {D DmpIA �� < d - tEVE� AND 4 INCHES PEA i00 FEET.
�„ m r RECOMMENDED SLOPE IS LEVEL.
BACKFILL �(/��p� P& CAN
+ + m Omo mo O�mN z0� _ �i IBrACKFFILL 3 'lASf1t INSTAPLLED CVVITH OfdPEE ROWS OF
T om Om= �O ti. • _ HOLES ALONG THE PIPE BOTTOM. PIPE
7 n • �•pEPTH OF MUST HAVE A BEARING STRENGTH OF
A x o.r • : _T O P PIPE AT LEAST 1000 LB/FT.
S sA ROCK ' • AT LEAST B'OF 4. MAINTAIN NATURAL SOIL STRUCTURE IN THE
• ROCK PE �BEEELOW TRENCH SURFACES N CONTACT WITH ROCK.
NOTE s. a WHERE TREES ARE PRESENT OR LIKELY TO BE
[:—Is*TO 38'� PRESENT DURING THE LIFE OF THE SYSTEM,
12 INCH" OF ROCK MUST BE PLACED UNDER
THE DISTRIBUTION PIPE,
TRENCH CONSTRUCTION DETAILS
VERTICAL SIDEWALL SEPTIC TANK
/--FINISHED GRADE
AT LEAST 6"T 12 SOIL AT LEAST
I'• 4" CLIA. COVER 4" DIA.�
MIN I -AT LEAST I" AT LEAST 1"
A DIMENSIONS FOR TANKS WITH VERTICAL_SIDES A
I [
WIDTH. W 24_MI_NIMUM
LENGTH,_L 2 TO 3- TIMES THE__WIDTH
AM
B DIETER 60 MIN
D!t)TH�D 3o"-MINIMUM; . . MAXIMUM C
AT LEAST ---" _0.2 D _
B 6" MINIMUM, 0.2 0 MAXIMUM 6"
3 C - 04 0
- -AT LEAST 4 FEET-
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