HomeMy WebLinkAbout1979-09-04 Septic System Design ReportSITE EVALUATION R13PORT
FOR DAVID NITZ
Lot 79 Block 1
FARVIEW
9-4-79
On September 1, 1979 six percolation holes were tested and
3 soil borings taken. The percolation holes were dug to a 42 inch
depth with 6 inch diameter hand and power augers as were the soil
borings to the 4 foot depth. The remaining depth for the soil bor-
ings was dug with a 1 inch diameter hand auger and a 3 inch diame-
ter power auger.
The average percolation rate for the six percolation holes
was 7.2 minutes per inch. Mottled soil existed in soil boring # 3
at 4.5 feet and in soil boring # 2 at the same depth. There was
some alight mottling also in hole two at 2.5 feet in the clay lay-
er which was underlain by a sandy loam layer which extended to the
4.5 fo3t depth were a clay loam and more mottling existed. Because
of the slope of the lot quite an amount of water flows down through
this drainfield area. This water must be diverted by grading above
this drainfield area. It will also be necessary to install an inter
captor drain at least 10 feet upslope from the drainfield area and
5 to 6 feet deep with rock being placed over this drain and some
black dirt and grass cover at the top. This will also help to di-
vert water from the drainfield area. Besides these measures it will
necessary to install a shallow trench system with the drain tile
being installed about a foot deep in the natural soil.
For the proposed five bedroom house and the average percola-
tion rate of 7.2 minutes per inch the minimum drainfield trench area
required is 952 square feet. However, it is recommended that 1200
square feet be installed. This would amount to 6 trenches of 100
feet in length and 2 feet in width. These would be spaced a minimum
of 6.5 feet center to eenter making the total width 32.5 feet.
Two 1000 gallon septic tanks should to used with the system.
Drop boxes are preferable for distributing the effluent to the in-
d1vidual trenches. All construction and materials should adhere to
the provisions of the Orono on -site sewage treatment manual.
If any additional information is needed, please contact me.
Sincerely,
PERCORi INC.
►
100
Mark S. Qronberg, P.E.
LOT 7, BLOCK 1
FARVI EW
Percolation Results
Hole No. Material
P-1 Brn, Medium Sand
P-2 Black Loam
P-3
Black Loam
P-4
Gray Brown Loam
P-5
Gray Sandy Loam
P-6
Black Loam
Percolation Rate
1.3 Min,/inch
3.3
9.4
10,0
5.7
13.3
The average percolation rate is 7.2 minutes per inch,
Soil Borings
s 8 1
Deuth_(ft.) Material
0.0-2.3 Black Loam
2.3-3.5 Dk, Brn, Sandy Loam
3.5-8.0 Bra. Clayey Sand
Water table at 7.0 feet after 24
hours. No indioation of mottling.
ss
Depth(_ ft_) Material
0.0-1.2 Dk, Brn. sandy Loam
1.2-2.0 Black Loam
2.0-8.0 Brown Clay Loam
Water cable at 5,2 feet after 24 hra,
Mottling at 4.5 feet.
S,B
Denth(ft. ) Mats, Meal
0.0-0.5
Black Lom
o,5-2.5
Brn. silty Clay
2.5-4.5
Gray Sandy Loam
4.5-6.0
silty Clay Loam
6.0-8.0
Gray Brn. Cl,Lm.
Water table
at 6.2' after 24
hrs. Mottling at 2.5 feet and
again at 4.5
feet,
Lor 7 BGocK /
lo ,
fACM i'WNIV FW44
L/ME
p,4pr: 9-+1-79
/ ": /oo
ADDITIONAL SITE EVALUATION
INFORFATION FOH DAVID NITZ
LOT 7, bLOCK 1 FARVIEW
11-13-79
On November 10, 1979 two additional percolation holes were tes-
ted and one additional soil boring taken. This was done because the
original primary site will be taken up by the new house location.
The original alternate site would be the location of the proposed
primary system. This newly tested area would become the alternate
site.
This new area meets the basic requirements for a shallow trench
system. However, as was the case on the two previously tested sites,
the water running down the side slope will have to be diverted from
J
the drainfield area. An interceptor drain will be needed for this
purpose. It may be possible to utilize a drain around the house for
this purpoes as long as it would be deep enough.
If any additional information is needed, please oontact me.
Sincerely,
PRRCOR, INC.
Ado
/Mark S. Qronberg, P.S.
DAVID NI T2
LOT 7, BLOCK 1
FARVIEW
Percolation Results
Hole No. Material Percolation Rate
P-7 Black Loam 48.0 Min./inch
P-8 Black Loam 24.0 r
The average percolation rate is 36.0 minutes per inch.
Soil Boring
S_2 B,Yf 1
RIP th(ft. ) Material
0.0-0.3 Dark Brown Sandy Loam
0.3-0,6 Brown Slack Loan
0.6-4.0 Black Loam
4.0-60 dray Black Clay Loam
Mottled soil existed at 4.0 feet and water
was observed at 4.2 feet after 24 hours.
Lor 7 Bto��r
JAR /ew
oo;; �.fi
• AVAUriAc
wE�c
1 75',04' & w r1wM4�ti
ti eAse,% e� I
1�►/s
� � N
fill
scAc Lr