HomeMy WebLinkAboutSeptic System Info SEPTIC SYSTEM INFORMATION
STREET ADDRESS )2S Ave--;&,
LOT -! BLOCK / SUBDIVISION 11-)6(i.L.)4 /Li._ pi r:.(..yE
MONTH AND YEAR TESTING DONE . &tJ 6. lei gr
ITEMS ALREADY COMPLETED S to 12-?/,)C S / ! e- C S t S STk'Y.„.
NEED TO COMPLETE BEFORE ISSUING BUILDING PERMIT:
OBORINGS
0 PERC TESTS
O SYSTEM DESIGN
321SITE PLAN
O OTHER
O COMMENTS
DATE THIS SHEET FILED 3 -a - 88, BY4- ( k „.
SUBDIVISION FILE NO. //to 3
To: Building & Zoning Administrator Mabusth
From: Michael P. Gaffron, Asst Planning & Zoning Administrator
Date: Ju , 1987
Subject- #1163 cDowell/Woodhill - Septic Testing Review
I have reviewed the site evaluation information submitted and would
make the following comments:
1. Each proposed lot contains both a primary and alternate drainfield
site. Three of the five lots have sites suitable for trench
drainfield systems. Lots 2 and 3 will require mound systems.
2. In every case, the two sites tested are probably the only feasible
sites for on-site sewage systems. This is especially true on Lots 2,
3, and 4, which all contain steep slopes, wetlands, and a single
relatively level area where the systems must go. Lots 1 and 5 have a
slight bit of leeway in that sites could shift slightly to allow for
alternate house sites.
3. In every case, we would want to have the septic sites fenced off prior
to issuance of building permits, since if the sites are disturbed, the
lots would become unbuildable.
A review of each lot follows:
Lot 1 - Both sites suitable for trenches, on the crest of a long
hill. House site is west of the septic sites. The house site will be
limited by the setbacks from front and right (south) side, but is feasible.
System will undoubtedly require a pump.
Lot 2 - The sites are both suitable only for mounds and are located at
the easterly corner of the lot. These sites are the only sites available on
the lot. The anticipated house site is downhill from the mound site.
Lot 3 - The mound sites are across a minor ravine from the anticipated
house site. No other septic sites are feasible. The alternate mound site
is about 40' from a low area we will be designating as a wetland, however,
the alternate mound will be vertically about 10' above that area, hence we
have no problem recommending approval of this site given that this is
essentially a closed basin.
PIE Lot 4 - Trench systesms could be installed on and just west of the
"saddle" area, with the house site further north. Note that 50' front and
rear setbacks will force the house to be wider and may tend to force
encroachment on drainfield sites - I would suggest a 30' rear setback be
allowed if possible.
Lot 5 - Trench sites are along the top of the long hill. The house
site is at the east end of that hill. There might be some potential to
"flip-flop" the house and drainfeld sites, but the house site has not been
tested for septic. Everything downhill is steep or is low and wet. With
driveway proposed from the east end, an easterly walkout is anticipated.
#1163 McDowell/Woodhill
Septic Testing Review
July 6, 1987
Page 2 of 2
General Summary -
Although each lot has sites identified, the lots are extremely limited
by septic sites, and relocation of houses to be on top of tested septic
sites can not be tolerated. Even though these lots each contain 2 or more
acres dry land, there are some potential "tight squeezes" in making it all
work. I have drawn boundaries around each site which must not be
encroached upon with structures, roadways, or other developments. These
must be adhered to for this subdivision to be septic-worry-free. See the
attached map.
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S-P TESTING, INC.
951 KATYDID LANE
ST. MICHAEL, MN 55376
497-3566
STEVE SHIRMERS
June 8 , 1987
John McDowell
Lot 4 , Block 1
Woodhill
Orono, Henn. Co. , MN.
This system is designed for a Type 1, five bedroom home and in accordance
with the Minnesota Pollution Control Agency standards WPC 40 and local
ordinances.
The soils on this site are typical of SCS soils mapped - HbC - Hayden loam.
A seasonally high water table was located at 56" to 64" , (mottling) . The
bottom of each trench must be located at least 3 ' above the seasonally high
water table.
The soils at a depth of 24" have a percolation rate averaging 24 . 0 min/inch
and are adequate for a standard treatment system.
A pumping chamber will need to be installed to lift the effluen to the
treatment area.
The power supply and switches must be located outside the manhole and pump-
ing chamber in a weather proof enclosure. A warning device must be in-
stalled with a light and sound device, this is in case of a pump failure.
(Mercury floats are a good method) . The supply line pipe must have back
drainage to the pumping chamber.
All neighboring wells are located more than 100 ' away from the proposed
treatment area.
Keep all heavy equipment off of the proposed treatment area before and after
construction as much as possible. The treatment area should be marked off
before construction.
With proper installation and maintenance, this system should have no prob-
lem in treating septic effluent effectively.
It is recommended that the septic tanks be pumped every 2 years.
Steven B. Schirmers
Soil and Percolation Tests
SBS/ds Septic System Design
.....
---_____�_
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existing grade
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• -•; V 1` . �`7 fill 6' min.
•
3'to4" ICyer of uncompocted 1, I •
4pipe dia.
` .:,cy or s'.� ccvereWI!)w, - O ��
- red rosin paper
la
rock filter material
j rake sidewalls Bi bottom to l
SET- BACKS remove smearing
r*-- -36
•
HOUSE System must be: •
Tank•L ' from property lines TRENCH X— SECTION
2.s•-• from wells min. of two trenches)
j ao from bldgs.
,-.311;1:-..
mi Treatment area =_ fro-n lakes, ')S- 54feGA:16 (max. length 100')
Treatment area Q Q ' from property lines i
}-iAPuo E$ r►v+x C." _ from wells
r'`� 2. from bldgs. j
1- - y'from trees ate:Power supply and switches must be in a weather
SOIL BORING ELEVATIONS -
I, j proof enclosure- outside-pumping chamber `
r min. •_ _ I a.. � �i ;-_ ' '� THIII EL.-3 -_1\4 �ckftss . .
/ I N
ip_e = --'r --41--- ; -; TH. 2 EL.-ate.�.a r
- ---
Tann ' o TH. 3EL.-gut.1
Tank Grode�/o sbpe
Drop to Tank H �At least 41/2'of undisturbed TH"4 EL-c+u�2.3
Min. Into B' earth between trenches : TH75 EL-m'�t.0
. '‘'--Pumping
t Max.!tto 4' �E� Q -T•141-\'<--S S`4S�LL,oc.0 Chamber ELEVATION at PROPOSED PUMPING
4"to 6"dia.pipe DROP BOXES CHAMBER- -I-1 (ground elev.)
SYSTEM DESIGN
•
TYPE- ,5 BEDROOM - Percolation rate '-1 min./inch (design",i - us min./inch) -r- `3 r.,,-r;)1'n •
Treatment area required w/,- of rock filter material; 10% =12).rsq.ft. of trench bottom area needed = trench width = lin.ft.of trench needed , number of drop boxes.
Number of tanks required =� , 1st tank ,.f gaL , 2nd tank:'2.-•[-gal. minimums F'�-L,5 e-->-rA'+N _fir
t= = (to be determined by the instoPer)
. Clean rock D4 cu.yds. ( 3/4" to 2 I/2"dia.,includes 2"above pipe ) PROPERTY OF: fin`1--\ t-el -,\:-.2(-)(A7,--1
Pumping chamber capacity= 25% of daily sewage flow.of]&,)_gal.=I5 gal.t Reserve.storoge gal s Pipe,bockcdrainege,� ='=•
gal= =1 gat, cop- \_..4:,\_..4:,--r-y- r C').-,-z__ 1 / t,, "r\�} 1_1.1
( Reserve storage = gal./ bedroom = 'N.<"n-•gal. t pipe back drainage-\< gal./100!in.ft..1 5-0 "pipe- length of pipe needed ap Ip r--ft. = gat.) �z°'`1� ' �'� N F'"�' /,ft, '
Pump sizetr t hp w/mercury float pump controls Else 3;_k' ,,,-:,{A. 2.,_-S
S-P TEST/NG INC
Note : When constructing bed - , this area should be shaped Note: Distance from treatment area to neighboring wells— Z � _ ( ? 1,_ '
�_cf::"71-,;-c--_--,-.? -71),,;,._; t.-.,,n I Designed By 1_
to divert run-off from entering treatment area. T Date:..!,,./7-v.)/.--/? , PH. 612-497-3566
I
CERTIFICATION # 00627 Logs of Soil Borings
Location or Project Lot 4 , Block 1, Woodhill
Borings made by S-P Testing, Inc. Steve Schirmers Date 6-2-87
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 984 . 6 feet Surface elevation 983.2
0 - 0 -
Topsoil dark gray loam Topsoil dark gray loam
0 - 8"
0 - 10"
1 - Gray 10" - 1 ' 4" brown loam 1 - Gray 8" - 1 ' 2" brown loam
Yellowish brown loam
Yellowish brown loam 1 ' 2" - 1 ' 84
to clay loam
2 _-. 1 ' 4" - 2 ' 4" 2 - Yellowish brown clay loam
1 ' 8" - 2 ' 8"
3 - Yellowish brown loam 3 -
2 ' 4" - 3 ' 10" Yellowish brown loam
4 - 4 -
Yellowish .brown sandy
loam
5 ' -mottling
2 ' 8" - 5 ' -mottling
5 - 3 ' 10" - 5 ' 4" 5 -
HIT ROCK
6 - 6 -
Olive brown loam
7 - 7 -
5 ' - 8 '
8 -- 8 -
End of boring at 5 ' 4" feet. End of boring at • 8 feet.
Standing water table: Standing water table:
present at feet ofdepth, 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 5 ' feet of depth. Observed at 5 ' feet of depth.
Not present in hole Not present in hole
Comments : Comments :
CERTIFICATION # 00627 Logs of Soil Borings
Location or Project Lot 4 , Block 1, Woodhill
Borings made by S-P Testing, Inc . Steve Schirmers Date 6-2-87
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 981.1 feet Surface elevation 982. 5
0 - 0 -
Topsoil dark gray loam
0 - 10"
1 - Gray10" - 1 , 4" broww�:oam 1 -
•
ca 1 ' 4" - 1 ' 8" Iooamn
Yellowish brown clay loam - SAME AS BORING #2
2 - 1 ' 8" - 2 ' 4"
3 - 3 -
Yellowish brown loam
4 - 4 -
2 ' 4 4 ' 8"-mottlin•
5 - 5 -
Olive brown loam
6 - 6 - 6 ' 2"-mottling
7 - 7 -
8 4 ' 8" - 8 ' 8 -
End of boring at 8 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 4 ' 8" flet of depth. Observed at 5 ' 2" feet of depth.
Not present in hole Not present in hole
Comments : Comments :
CERTIFICATION # UubL i Logs of Soil Borings
Location or Project Lot 4, Block 1. Woodhill
Borings made by S-P Testing, Inc . Steve Schirmers Date 6-2-87
Clas'sifiction System: AASHO ; USDA-SCS X ; Unified ; Other
Auger used (check two) : Hand X , or Power , Flight , or Bucket X
Depth, Boring number 5 Depth, Boring number 6
in in
feet Surface elevation 981.0 feet Surface elevation 983 . 2
' ' 0 = 0 -
Topsoil dark gray loam Topsoil dark gray loam
0 - 10" 0 - 10"
1 Gray brown loam 1 - Gray 10" - 1 ' 4'; brown loam
10" - 1-1/2 ' Yellowish brown clay loam
Yellowish brown clay loam
2 .- 1-1/2 ' - 2 ' 2" 2 1 ' 4" - 2 ' 2"
-
3 - Yellowish brown loam
Yellowish brown loam
4 - 4 - 2 ' 2" - 4 ' 2"
etl1 inneish4 ' 2" - 4-1/21sannynloam
2 ' 2" - 4 ' 10"-mottling Yellowish brown loam to
5 - 8E13/13'10"J.i_ve8E13/13'10" - 5 ' 4" slimy /gam 5 5 ' 4"-mottling sandy loam
aces o
4-1/2 ' - 5-1/2 '
6 - 6 -
Olive brown loam Olive brown loam
7 - 7. -
8 - 5 ' 4" - 8 ' 8 - 5-1/2 ' - 8 '
End of boring at 8 feet. End of boring at 8 feta.
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 4 ' 10" feet of depth. Observed at 5 ' 4" feet of depth.
Not present in hole Not present in hole
Comments : Comments :
• PERCOLATION TEST DATA SHEET
Steven B. Schirmers 613-87 11 : 46 C
Percolation test readings made by _on_ starting at p.m. .
Test hole location Lot4,B l k. 1 ,Woodhi l 1 _ -iole number 1 ,Date hole was prepared 6-2-87
Depth of hole bottom 24 inches,Diameter of hole 6 inches
Soil data from test hole:
Depth, inches Soil texture
0 — 10" Topsoil dark gray loam
10" — 16" Gray brown loam
16" — 24" Yellowish brown loam to clay loam
Knife
Method of scratching sidewall
Depth of gravel in bottom of hole 2 inches
1: 00p.m.
Date and hour of initial water filling 6-2-87 ,Depth of initial water filling 12 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
i inch
11 : 35 prefill 6
11 : 46 12 : 16 4-5/8 6 .5 30 min
12 : 27 12 : 57 4-7/16 6. 8 " "
12 : 58 1 : 28 4-1/4 7.1 "
6 . 8
Percolation rate = ._minutes per inch. •
•
. . • PERCOLATION TEST DATA SHEET
Steven B. Schirmers 6-3-87 11 : 47 (4.111.
Percolation test readings made by on starting at .m:
Nair)
Test hole location Lot4 ,B lk. 1 Woodhi 11 , Hole number 2 ,Date hole was preparers 6-2-87 •
Depth of hole bottom 24 inches,Diameter of hole 6 inches
Soil data from test hole:
Depth, inches Soil texture
0 — 8" Topsoil dark gray loam
8 " — 14" Gray brown loam
14" — 20" Yellowish brown loam
20" — 24" Yellowish brown clay loam
Method of scratching sidewall Knife
Depth of gravel in bottom of hole 2 inches
1: 00p.m.
Date and hour of initial water filling 6-2-87 ,Depth of initial water filling 12 inches above hole bottom •
Method used to maintain at least 12 inches of water depth in hole fur at least 4 hours Automatic siphon
,Maximum water do th above hole bottom during test 6 inches
Time Percolation '
Time interval, Measurement, Drop in water rate, Remarks
minutes inches level, inches minutes per
inch
11: 35 prefill 6 _
11: 47 1 12 : 17 ii4-1/4 7. 1 30 min
12 : 26 12 : 56 II4 7. 5 t, "
12 : 59 1: 29 " 3-13/16 7.9 " "
i
Percolation rate = 7. 5 _minutes per inch.
PERCOLATION TEST DATA SHEET
Steven B. Schirmers 6-3-87 11: 48
Percolation test readings made by on _starting at p.m.
Test hole location Lot 4 ,B 1 k 1. Woodhill , Hole number 3 ,Date hole was preparedi 6-2-87
24 6
Depth of hole bottom inches,Diameter of holt. inches
Soil data from test hole:
Depth, inches Soil texture
0 - 10" Topsoil dark gray loam
10" - 16" Gray brown loam
16" - 20" Gray brown clay loam
20" - 24" Yellowish brown clay loam
Method of scratching sidewall Knife
Depth of gravel in bottom of hole 2 inches
1: 00p.m.
Date and hour of initial water filling 6-2-87 , Depth of initial water filling 12 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
11 : 35 prefill 6
11: 48 12 : 18 " 3/4 40 .0 30 min
12 : 25 12 : 55 11 11 11
"
1: 00 11: 30 It 11
"
40
Percolation rate = .0
minutes per inch.
� +
PERCOLATION TEST DATA SHEET
Percolation test readings made by Steven B. Schirmers on 6-3-87 __starting at 11: 49
Wwy
Test hole location Lot 4 , B l k. 1, Woodhill ,Hole number 4 ,Date hole was prepared 6-2-87
•
Depth of hole bottom 2 4 inches,Diameter of hole 6 inches
Soil data from test hole:
Depth, inches Suil texture
0 - 8" Topsoil dark gray loam
8" - 14" Gray brown loam
14" - 20" Yellowish brown loam
20" - 24" Yellowish brown clay loam
Method of scratching sidewall Knife
Depth of gravel in bottom of hole 2 inches
1: 00p.m.
Date and hour of initial water filling 6-2-87 ,Depth of initial water filling 12 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
li Time interval, Measurement, Drop in water rate, Remarks
minutes inches level, inches minutes per
inch
Water remlaining in test hole
11 : 49 1 12: 19 6 11/16 43. 6 30 min
12 : 24 12 : 54
1: 01 1: 31 11
"
••
Percolation rate = 43 . 6 _minutes per inch.
•
PERCOLATION TEST DATA SHEET
'4
•
Steven B. Schirmers 6-3-87 11: 51 a.m.
Percolation test readings made by on_ starting a
Wau)
Test hole location Lot 4,B 1 k. 1, Woodhill , Hole number 5 , Date hole was prepared 6—2—87
Depth of hole bottom 24 inches, Diameter of hole 6 inches
Soil data from test hole:
Depth, inches Soil texture
0 - 10" Topsoil dark gray loam
10" - 18" Gray brown' loam
18" - 24" Yellowish brown clay loam
f
Method of scratching sidewall Knife
Depth of gravel in bottom of hole 2 inches
1: 00p.m.
jDate and hour of initial water filling 6-2-87 ,Depth of initial water filling 12 inches above hole bottom
! Automatic siphon
Method used to maintain at least 12 inches of water depth in hole for at least 4 hours
,Maximum water depth above hole bottom during test 6 —inches
Time Percolation '
Time interval, Measurement, Drop in water rate, Rem.uks
minutes inches level,inches minutes per
inch
11 : 35 •refill 6
11: 50 12 : 20 n1-3 4 17. 2 • min
12 : 23 12 : 53 II 1-5 8 18. 5 ft "
1 : 02 i 1 : 32 n Il II II
"
I
I Percolation rate = 18 . 1 minutes per inch.
.
PERCOLATION TEST DATA SHEET
Steven B. Schirmers 6-3-87 ,
Percolation test readings made by on _starting at 11 : 51 AWANDb
p.m. ',
Test hole location Lot 4 ,B l k. 1 , Woodhill ,Hole number 6 ,Date hole was r� area 6-2-87
•
P 'P'
Depth of hole bottom 24 inches,Diameter of hole 6 inches
Soil data from test hole:
Depth, inches Soil texture
0 — 10" •
Topsoil dark gray loam
10" — 16" Gray brown loam
16" — 24" Yellowish brown clay loam
Method of scratching sidewall Knife
2
Depth of gravel in bottom of hole inches
Pm.-
I Date and hour of initial water filling 6-2-87 ,Depth of initial water filling 12 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
� t ,
Time Percolation
Time interval, Measurement, Drop in water rate, Remarks
minutes inches level, inches minutes per
inch
11 : 35 prefill 6
11 : 51 12 : 21 1-1/16 28. 2 30 min
12 : 22 12 : 52 II
"
1: 03 1: 33 "
I .
0
28. 2
Percolation rate = minutes per inch.
i •
J,,. 0,, .1. $` h
+ 4-‘,12',:r
• x
' .5*.%,1 .r.4p� . -om '1` ✓v
r- ` . ),er,
45 .,`(/
'� u .. :`• ,� ,iv''• y ; �--- -- MOUND FILL 4"- 6"
t '"`' :` -f :c i TO ALLOW FOR
r 1? �,�`S'� - � t SETTLING
!'"" ��`RSGo��5 y' �", WIf'"S� '' '
,� �� �Q- f - : : ,,,,:,, , ,: - II ---GRASS COVER
• f_,.�Q\Q� o A. '' ) , aif, .�• .='� ?-- 6" TO 34" OF SOIL
�'� ai '�1 4���� �ir'� �' COVER ABOVE ROCK
i
.� yf ,� ��il..,f/ r:� : .� � ;f' 3/4" TO 2 1/2" DIA.
y,,- iV. �- r CLEAN ROCK
;s� sib` �4'� ' •����. 4?�' 3� • �, / ��
e"�' J c:;•�Rp,.•: �: � � ,. r,x • ,,cr - 3"- 4" LAYER OF UNCOMPACTEC
/ . .fib/ -? - •(►ii,; r''... • ' �` ' i/' HAY OR STRAW COVERED WITH
EpR��i`. ' - '� '• /i' RED ROSIN PAPER
5�•' 1� �'' "r7�' .<<--- -- TRENCH BOTTOM MUST BE LEVEL
`. r°8E0r'':�'•' N• // THROUGHOUT LENGTH
SRTw'' of // o
:, _ :: : ----2/-----2-/—l/--, `""--- 2" MINIMUM ROCK COVER ABOVE PIPE
• `: , //
. •'� :
I.
`
L....%
_~ .
TRENCH CONSTRUCTION DETAILS .
PIPE TO NEXT 4 DIAMETER INSPECTION
INLET DROP BOX N WELL WITH CAP
/ vr EARTH BACKFILL AT LEASTy—
'
TO 6 INCH LAYER OF o r r tri
�� , 6" ABOVE TOP OF ROCK MARSH HAY OR STRAW AND °
./ `.�A LAYER OF RED ROSIN ����
I _ _ _ A PAPER _ _� _ ' s2_,!..-,,y.
4" DISTRIBUTION PIPE ..
_AT LEAST 6" DEPTH OF CLEAN °
`, ROCK 3/4" TO 2 I/2" DIA. °
DROP BOX V I
MAXIMUM LENGTH = 100 FEET 3. 1 •
OVERFILL NOTES : I . BOTTOM OF TRENCH MUST BE FLAT ALONG
/-4 TO 6 INCHES LENGTH.
INSPECTION 2. SLOPE ON DISTRIBUTION PIPE IS BETWEEN
WELL LEVEL AND 4 INCHES PER 100 FEET.
RECOMMENDED SLOPE IS I TO 2 INCHES PER
t/ BACKFILL 06" TO I2" OF 100 FEET.
° SOIL BACKFILL 3. DISTRIBUTION PIPE CAN BE PERFORATED
° _ f PLASTIC WITH 1/2 INCH OR LARGER HOLES.
w �, ." - - 0 ONE OF THE ROWS OF HOLES MUST BE
° -72" DEPTH OF LOCATED ALONG THE BOTTOM OF THE PIPE.
y,�y� ° ROCK ABOVE ONE — FOOT AGRICULTURAL DRAIN TILE CAN
"' ° PIPE BE USED WITH A '/4 INCH SPACING.
ROCK ° AT LEAST 6" OF
ROCK BELOW 4. SCARIFY TRENCH BOTTOM AND SIDEWALLS
r:' PIPE AS HIGH AS ROCK WILL BE PLACED IN THE
TRENCH IN ORDER TO EXPOSE NATURAL SOIL.
. 18"TO 36" '-i REMOVE LOOSE SOIL BEFORE PLACING ROCK.
5. WHERE TREES ARE PRESENT OR LIKELY TO BE
PRESENT DURING THE LIFE OF THE SYSTEM,
12 INCHES OF ROCK MUST BE PLACED UNDER
THE DISTRIBUTION PIPE.
•
. FIGURE 5
12- EARTH C.
COVER GRASS COVER
4.--I--j.•
is ISI i' :
SEPTIC
TANK —DROP BOXES
LEM
4' DISTRIBUTION ' ' } 1
PIPES I I
' 1 I ,.
r DROPI I j ' 1
LI, SEPTIC . ' B0=`"' a I •- - - = =-� +' '
TANK ,i I I\ EXTRA TRENCHES' -,i
•
1 I I CAN BEADDED IF I " I
I INEECESSARY� r I
4` WATER-TIGHT Is:
PIPES - \ I -- I :: II
SEWAGE TREATMENT SYSTEM WITH DROP BOXES
�.
NOTES
OUTLET TO FIGURE 6
TRENCH
11111 I. PIPES SHBE AT LEAST
4-ALL INCH DIAMEOULDTER
INLET FROM
SEPTIC TANK 2. ELEVATION OF INLET AND SUPPLY
OR PREVIOUS , LINE TO NEXT DROP BOX MAY BE
DROP BOX - SUPPLY LINE ADJUSTED UP OR DOWN FOR DESIRED
TO NEXT EFFLUENT LEVEL IN TRENCH
DROP BOX
/� 6. �� 3. SUGGESTED TRENCH LIOUID LEVEL
IS 2'ABOVE TOP OF OUTLET PIPE
4. INVERT OF INLET MUST BE AT LEAST
ONE INCH HIGHER THAN INVERT OF
• • SUPPLY PIPE TO NEXT DROP BOX
OUTLET TO 5. TRENCHES MAY OUTLET ONE SIOE OR
s. TRENCH BOTH SIDES OF DROP BOX
0'
IN
� �^ e I • INLET
I _
--1 ) 1 � SuPPLY LINE i �- �, I SUPPLY
INLET I i i : , I
Y4-1
_' I. LI 1 , 4111
I -1- I
I 2 I r• i-
•1 1 �_I _ 0
•
• I -OUTLET TO TRENCH
-OUTLETS
I TO TRENCH I I
I : I---------) _
DROP BOX
•
PIGGY BACK PLUG IN WEATHER ALARM WIRE FROSTPROOFING THE DROP BOX
PROOF ENCLOSURE-OR LOCATE \ MANHOLE COVER SECURED
IN HOUSE BASEMENT DISCHARGE PIPE x.,r. 12 SOIL COVER , '
POWER SUPPLY------ 4 EN\ PREVENT UNAUTHORIZED _
CONTROL WIRE------1ENTRY 1 PLACE A ROCK ENVELOPE `+ 3/a 2'/2 DIA. HOCK
PUMP POWER CORD-- Vtr —DRAIN TILE OR RIGID
AROUND DISCHARGE PIPE. LFROM PUMP/
24"MANHOLE J1 • ROCK SHOULD BE 34 TO 2'/2 f 3' MIN. FROM PERBOTTOM OF TRENCHFORATED PLASTIC I TO
tNii ( INCHES IN DIAMETER, WITH
FROM t I , 1OR
' UNION OTHER WATER TABLE OR CLAY OR ROCK
ST
i_ QUICKODISCONNECTRNO SAND. COVER WITH A 2 LAYER
SEAL ALARM FLOAT ON SEPARATE FITTING INCH THICK SHEET OF
TANK ELECTRICAL CIRCUIT
EXPANDED POLYSTYRENE.
RESERVE CAPACITY WHEREVER POSSIBLE MAIN-
TO SOIL
AFTER ALARM SOUNDS O
I -"-TREATMENT TAIN A GRASS COVER OVER SOIL TREATMENT AREAS FOR TYPE I HOMES°
AREA TOP OF TRENCH AND ALLOW
START LEVEL S7 �:,,_ _ _ '/4 WEEPHOLE FOR SNOW TO REMAIN IN PLACE. REQUIRED SOIL TREATMENT AREA
{—.. --- 3•) ORAINBACK;OR WHEN SNOW COVER IS LIGHT, IN SQUARE FEET PER BEDROOM
— - — CHECK VALVE MAY
•
IBE INSTALLED IF PLACE A 6 INCH HAY OR PERCOLATION
SMUT-OFF LEVEL Sj__ PIPE TO TREATMENT RATE IN TRENCHES
F
AREA IS FROST STRAW LAYER ON GROUND
r PROOF MINUTES PER
12"-18"MINIMUM DEPTH �_ ABOVE PIPE. INCH SEEPAGE DEPTH OF ROCK BELOW
E0001 BEDS DISTRIBUTION PIPE, IN INCHES
PUMPABLE CAPACITY
AT LEAST 75 GALLONS 'i ov 6 12 18 24
BACKFILL
EXPANDED FASTER — — — — —
POLYSTYRENE ���' b .
PUMPING RATE SHOULD NOT EXCEED DROP BOX ./ THAN 0.1
OUTFLOW CAPACITY OR 45 GALLONS PER MINUTE DISCHARGE 0.1 TO 5 125 125 100 85 75
(2700 GALLONS PER HOUR). 6 TO 15 190 190 150 125 115
PUMP DISCHARGE HEAD MUST BE ADEQUATE TO ROCK 3/4"-21/2" DIA.
OVERCOME ELEVATION DIFFERENCE BETWEEN THE 16 TO 30 250 250 200 165 150
PUMP AND DISTRIBUTION BOX PLUS FRICTION LOSS
IN DISCHARGE PIPE. 31 TO 45 300 300 240 200 180
46 TO 60 330 330 265 220 200
LIQUID CAPACITIES OF VERTICAL CIRCULAR TANKS SLOWER _ _
• THAN 60b _
INSIDE DIAMETER OF TANK GALLONS PER FOOT
IN FEET OF DEPTH °SEWAGE FLOW • 150 GPD PER BEDROOM
TO DETERMINE THE LIQUID SPECIAL DESIGN SHOULD BE USED TO PROVIDE ADEQUATE
1.5 13 O TREATMENT AND ABSORPTION OF EFFLUENT
2 O 23 5 CAPACITY OF ANY TANK, FIRST
DETERMINE THE SURFACE AREA
2.5 37.0 OF THE LIQUID. MULTIPLY
3.0 53.0 THIS VALUE BY 7.5 (GALLONS
4.0 94.0 PER CUBIC FOOT) TO DETER- RECOMMENDED AMOUNT OF EFFLUENT TO PUMP
PER
IS
PERCENT
5.0 147.0 MINE THE TANK LIQUID MINIMUM AMOUNTOFOILSEWAGE
EFFLUENTTO PUMPPER
W
6.0 213.0 CAPACITY IN GALLONS PER CYCLE IS 75 GALLONS.
FOOT OF DEPTH.
FOR EXAMPLE, A CIRCULAR TANK WITH AN INSIDE
DIAMETER OF 4 FEET HAS 94 GALLONS OF LIQUID
CAPACITY PER FOOT OF DEPTH. ,
TO PUMP 200 GALLONS PER CYCLE, THE PUMP
CONTROL SWITCHES WOULD NEED TO BE SET 2.1
UNIVERSITY OF MINNESOTA
(200/94) FEET APART. EXTENSION AGRICULTURAL ENGINEERING
'":n 'y 1 of
•
PUMPING STATION c'!� `;2, No.
. 3.
•
/0111101.:.
METAL 40044 icooli • •
COVER
•
• • 4--.... . - - .' -
PJ 1 1 3
•,- ,
• _ • � i- 1:. • . . . 1 I s
0 1 ,
___\. . I y II I
CONCRETE i I ,
MANHOLE = s_=_=
RING -
„Ni.
METHODS OF SECURING MANHOLE COVER TO PREVENT
UNAUTHORIZED ENTRY
1
(l
f• 'r 4-4111PENCIL
MARKS ,•.,.. .i. _
■ t
A./.
04010.00.&-.
. • .Agempritt. ._
. . , :.L
• q� •_•y.',,,..
L s
l7
/ .i 20" �/ ..• I I:• .4r. . ...
.yii
� MANHOLE ;1
.i i
r
a �:��' � SCUM ..i. -.:1". .‘.:-'7-'' ' 1'Is 9' ' OUTLET
INLET -:7-- t q l,
•
,. = r'OUTLET LEVEL .,. '*;, �= :1's 1i '• �i
tV � ,_ = _ _ � __ _ --_ -•_ `; tip li•. 1 '
— — - - — — — ,r II
SPACE -- -�' t1 OUT TANK WHEN
_ SCUM CLEAR J �= CLEAN
_- _.. .__ __ _-- - -= - —T 'A" IS 3" OR LESS OR
--- ---- -- -- --- - -- - ---- "B" IS 12" OR LESS
. _____ —-,-_— — . ..._____ _
r , : ______.__ — ____ _ ___,_„______ --=_ . . . .
),
.f: si-:...-•• . • . . • • I BLACK COLOR
�� SLUDGE : - ; -f • DISTINGUISHES SLUDGE
;•: • LAYER FROM LIQUID
�� �� • I'
w
- 1v/ •
MEASURE SCUM AND SLUDGE ACCUMULATIONS
IN THE SEPTIC TANK .
blActi
gf "{x
.$u t fes,
:',A414411pt ".
� p. CITY of ORONO
CITY * eb: Post Office Box 66•Cr stal Bay,Minnesota 55323 Municipal Offices
ORONC3 " On the North Shore of Lake Minnetonka
December 23, 1987
Bob & Lucy Mitchell
1745 North Willow Drive
Long Lake, MN 55356
Re: Lot 4, Block 1, Woodhill Ridge
Dear Bob & Lucy:
Jeanne and I have reviewed your proposed site plan and the
various septic reports by SP Testing. The proposal would appear to
meet the setback requirements for the house, driveway, and drainfield
areas with one minor revision. We would want to see the proposed
driveway and parking area moved to the northwest in order to allow an
additional 20' of area at the north end of the future expansion site.
This would compensate for the relatively unusable area of 20% slopes
at the south end of the future expansion area.
I have attached a sketch showing the proposed revision and
drainfield area. It would appear the most significant consequence of
this revision would be necessitating some additional fill at the
northwest side of the parking area.
Please contact either Jeanne or me at 473-7357 if we can be of
further assistance.
Sincerely,
Michael P. n,
Asst Planning & Zoning Administrator
IPG/tln
/cc: Jeanne A. Mabusth, Building & Zoning Administrator
BUILDING&ZONING—473-7357 • ADMINISTRATION&FINANCE—473-7358 • PUBLIC WORKS—473-7359
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