HomeMy WebLinkAboutALPINE TERRACE BLK 2 LT 5Alpine Terrace
lock 2
Lot
! 5- 243
-O3
9
• Municipality of Anchorage41E.
._ Development Services Department
Building Safety Division �5
On-Site Water and Wastewater Program,4700 Elmore Road
P.O. Box 196650 Anchorage,AK 99507 Page 1 of 6
www.ci.anchorage.ak.us (907)343-7904
ON-SITE WASTEWATER DISPOSAL SYSTEM AND/OR WELL INSPECTION REPORT
Permit umber: (SP ( I (2—/"4 PID Number: 0 7 y 3 O 3
Name: ' 1
till 1 � lJ1i{Itl�//j/`4 SP� Wastewater System: Ill New �Upgrade
Address. ^1 4.:i lkd^:0 1 , 'Qi Jam,44 4v?tl1 g75d.7 ABSORPTION FIELD
Phone:
el(Y1 , /-t ,' i '4 !� Number of Bedrooms:
6 Deep Trench 0 Shallow Trench 0 Bed 0 Mound 0 Other:
LEGAL DESCRIPTION Soil Rating % f GPD/Ft2 Totalepth/2 �rigiVnta^IgrtaAde: Ft.
Block: Lot: ision: Depth to pi bottom kom original grade: Gravel(d/eppth/1rrene h pipe:
2 s 4( pi,Ae 2cc e� 7(O Wrn Ft. 1 /� Ft.
Township. ``11 a (,, ectionc{x (\'�//t Fill added bove original Mde:A Gravel Length:/�
1�Iv � �`� C�--'C � 1 L3 1`i` ��_. � 1l Ft. G Ft.
Gravel width: Number f lines: Distance between lines:
{ 11: ❑ New El Upgrade I / I -f' Ft. 1 Ft.
Classificaf n Prvat ��). Total Depth: Ft. Ft Ft2 Cased to. Total absorption are PpeyMater � � � "3
Driller: VV L/ Date Drilled: Static Water Level: Installer: DateWIIsstalled: r
Ft. S�( f- (v 151x( -t loI 1)Irl
Yield :Pump Set at: Casing Height Above Ground: !
GPM Ft. Ft. TANK
SEPARATION DISTANCES giSeptic 0 Holding ❑S.T.E.P. ❑Other:
To Septic Absorption Lift g Pubf PPAte Manufacturer Pacify
From Tank Field St t Se+Gef-line .o e(' �r v0 r� Gaf
AA I Material: 5X NLmber of Compartments:
Well I66 ! ' f X
2.-
4.. /
Surface Water 90 k � + LIFT) ATION
Lot Line 1
Size: Manufacturer:
-,- rr 1
GaL-
Ci ���� ' "Pump on"level at: "Pump off level at: High water alarm at:
Foundation ,y + in. in. in.
Pump Make 8 Model Electrical Inspections performed by:
Curtain
Remarks: t t
' iff.(i e or. 4_4446,:e BENCH MARK
Location and escription:
di-Pk ' 11' 14 CI -RC2 tt ? Pit.( v' CU✓ICre ' v✓_
ooi d-� eA
, � r Asum
Elevation:
/- Al X4 -4;b1 am, / / 7
1741-1 /1 W )2 o ra (a 10 &Sf(JewQelJ
Engineer's Stamp
Inspections performed by: atit( . iai / -6 Dates: 1st (CS � t! .,��,`1`r,,it
1 .1.11. OF A
2nd (61l4> (t ~v..,......gs�kh
11
Development Services Department Approval lc*:'�P•'• �4,,. i
• V
/N * 'I
Conditional Approval Date: ..'.ipt, . ......' . ........ of
/o�:Paul G. Hansen ; j
(� (� sr CE 37iQ ..$
Reviewed and approved by: Pa)-C,0(5,\ \pl w Date: 11 1k 49::•• ••*`���
(Rev.04/06) M ,.�, CYa CCM T�' YJC' SILsx.�G}"�Jt ;1.1.6'1—G{ �Y Li
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glIVVRonss 0 *��� 1� 1 (I 100' 0, 100' 200'
t\NA.1ti"~ ( M. M ME BE Me
SCALE: 1"=100'
(----3---__ -Ric,-
EXISTING WELLS AND SEPTIC SYSTEMS
PAUL G. HANSEN, PE LOT 5, BLOCK 2, ALPINE TERRACE SEPTIC SYSTEM UPGRADE
11941 HILLSIDE DRIVE 11941 HILLSIDE DRIVE, ANCHORAGE DATE: SEPT. 2011
ANCHORAGE, AK 99507 PAUL HANSEN (OWNER) SHEET-I -Of-- 2 oI6
141
N 89' 59' 20" W 149.97'
1
I
1 I
0
o FUTURE OPTION IF� RUM)
CONNECT EXISTING DRAINFIELD I
TO NEW SYSTEM USING A
= DIVERTER (FIELD-LOCATE) I
1
DRIVEWAY I
MillW-1
EXISTING DRAINFIELD EXIST.
(APPROX.), TO IIIN HOME
REMAIN (3 B.R.) =
=
b # ? a
Lri 38' `Li to
-d-
-
I 23' .1 13
F ' EXIST_ 1,000 GAL SEPTIC
_ TANK PUMPED AND I o
REMOVED; NEW TANK = �b
/7% SLOPE (±) INSTALLED NEAR SAME c o
Z 1 +TH 1 LOCATION I z
I . I
1 S TP1+ / I
NEW DRAINFIELD I `-
TRENCH (50' LONG)
t
�
�
.--:17 r EXIST.
100' R I
WELL
10' UTILITY EASEMENT
,
` ?`9?,S• ` t - -- -------—I--
N 89' 58' W 125.0'
„�'�. '
� MIN SETBACK - ALATNA AVE. -
. ..........%1i.. 10
0 6,.• • , 4.- •''�y+r 30' �' 30' 60'
*. . . TF1 /' `.*�,' n
/••• /1 • •o / SCALE: 1 =30'
/. . . .. /
I/ Paul G. Hansen :tire
e
'eV., r ,• CE . 3710••. 4.��dJ.2y 11 SITE PLAN
1,vP,\i.s.4- ,~+
As_ t7
PAUL G. HANSEN, PE LOT 5, BLOCK 2, ALPINE TERRACE SEPTIC SYSTEM UPGRADE
11941 HILLSIDE DRIVE 11941 HILLSIDE DRIVE, ANCHORAGE DATE: SEPT. 2011
ANCHORAGE, AK 99507 PAUL HANSEN (OWNER) SHEET 2 01 3 -50 6
/SEPTIC TANK / EXIST. HOME
(1,000 GAL)
(3 BR.)
/
11111
1 CLEANOUT
EXISTING i
DRAINFIELD I J TANK CLEANOUT / ��
(APPROX.) 1i (TYP) / / 11
I I
I l a); F !
I, / ' I\QI \S.
I ; CLEANOUTiP
I
-----------J- FUTURE OPTION, IF REQ'U
F
- ---- �/- CLEANOUTS BULL RUN VALVE
/tib/
6a j 4" SOLID PIPE (TYP) (DIVERTER) CONNECTED
TO BOTH DRAINFIELDS
CLEANOUT /
4" PERFORATED T
PIPE / ifk
11 / 6" MOUNDED
I / BACKFILL
1
i
1
MONITORING f / NATIVE BACKFILL
I
TUBE ; FILTER"DEEP TRENCH" DRAINFIELD FABRIC `�'
l (50' LONG x 10-1/2' DEEP) < - .
I
4" PERFORATED PIPE J' i
b
(HOLES DOWN) ' '�` -
%i i:`v i cD
CLEANOUT :l_-1.�.; -
k.1 N-
4N
. ' •s- + WASHED ROCK . fitt :!•
-
" y•. iN 9 .. ...-.
40.. . •.•:— of 1 1/2'
! : Paul G. Hansen to
Ojif ,• CE • 3710 �..y�1
ilfE I_______•' ti�•. /o r r1 TYP TRENCH SECTION
i P OrESs10M�b= NTS
N.N.W•LN.,' /- r--- la-
SEPTIC SYSTEM LAYOUT & TYP SECTION
NTS
PAUL G. HANSEN, PE LOT 5, BLOCK 2, ALPINE TERRACE SEPTIC SYSTEM UPGRADE
11941 HILLSIDE DRIVE 11941 HILLSIDE DRIVE, ANCHORAGE DATE: SEPT. 2011
ANCHORAGE, AK 99507 PAUL HANSEN (OWNER) SHEET 3 0` 3 1 Uri
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o
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•
PAUL G. HANSEN, P.E.
11941 HILLSIDE DRIVE
ANCHORAGE, AK 99507
(907) 345-7462 paul2hansen@yahoo.com
SEPTIC SYSTEM UPGRADE
LOT 5, BLOCK 2, ALPINE TERRACE SUBDIVISION
Paul Hansen(Owner), 11941 Hillside Dr., Anchorage, AK 99507
As-Built Notes and Construction Changes
1. The new septic system was installed on October 15-16, 2011 by me and 4-5 engineering
friends, using two pieces of equipment—an excavator and skid steer loader.
2. Insulation boards(2" Dow"Blueboard"extruded polystyrene)were installed over the new
septic tank. The insulation footprint,approximately 8' x 9', was centered over the tank with
the long dimension in the NE-SW direction.
3. The pipe to the existing(old)drainfield was cut approximately 2-4 feet downstream of the
new septic tank. The old drainfield can be connected in the future to the new system, if
necessary, by means of a diverter. The old pipe that remains is slightly higher than the new
tank outlet so at least ten feet of old pipe will need to be replaced with pipe at a lower
elevation when tying into the old drainfield.
4. Solid PVC pipe was installed in a nearly straight run between the septic tank outlet and the
drainfield in order to minimize the trench length.
5. The alignment of the drainfield at its north end was rotated a few feet east to allow the use of
a 45 degree elbow at the start of the drainfield.
6. No groundwater,bedrock, or impermeable layers were observed in the drainfield trench.
7. The monitoring tube was installed approximately 14 feet from the end of the drainfield trench
because some washed rock was placed prematurely at the end of the trench. The relocation
should have no effect on any future field measurements as the tube extends to the full depth
of the trench.
8. As-built elevations (approximate) " :S'`Nq
Of Ate e
o Septic tank inlet—Inv. Elev. 94.3 ,:, ;•'` '••S`fl�
o Septic tank outlet—Inv. Elev. 93.8' 0.4").*
o Perforated pipe at drainfield—Inv. Elev. 90.0' % y . •• '�
o Bench mark-top of front stoop—Elev. 100.0' (assumed) 1 142/1 '--
so/ Pau' G. Hansen :.�
ff;ay. CE 3710 ..���i
'IliPROFESSI0O*"
14 J(
1;tt
Permit Number:
Tax Code Number:
Work Type:
On-Site Wastewater Disposal System
OSPl11274
01524303000
Septic
MUNICIPALITY OF ANCHORAGE
Development Services Department
On-Site Water & Wastewater Program
4700 Elmore Road, PO Box 196650
Anchorage, AK 99519-6650
Telephone: (907) 343-7904
Upgrade
Permit Effective Dates: October 10, 2011
Design Engineer: HANSEN PAUL G
Subdivision: ALPINE TERRACE
Site Legal Address: ALPINE TERRACE BLK 2 LT
Owner/Address: HANSEN PAUL G
PO BOX 385 COLBERT WA 990050000
to October 09, 2012
5 G:2740
Permit
f)et. ar tme~zt
Site Mailing Address: 11941 HILLSIDE DR, Anchorage
Lot Size in Sq Ft: 25330
Total Bedrooms: 3
This permit is for the construction of:
Y Disposal Field Y SepticTank N Holding Tank N Privy N Private Well N Water Storage
All construction must be in accordance with: 1. The attached approved design.
2. All requirements specified in Anchorage Municipal code Chapters 15.55 and 15.65 and the State of Alaska Wastewater
Disposal Regulations (18AAC72) and Drinking Water Regulations (18AAC80).
3. The wastewater code requires inspections during the installation. The engineer must notify the Development Services
Department at least 2 hours prior to each inspection. Provide notification by calling (907) 343-7904 (24 hours).
4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must either:
A. Open and Close on the same day.
B. Covered, sealed, and heated to prevent freezing.
Date: /~_.,]//////I j/
Date: //~
/
Municipality of Anchorage
P.O. Box 196650 ® 4700 Elmore Road
Anchorage, Alaska 99519-6650 ® (907) 343-7904 · Fax (907) 343-7997
http:llwww.muni.or,qlOnsite
Development Services Department
On-Site Water and Wastewater Pro.qram
~ep:artment
VARIANCE/WAIVER REVIEW
Waive~: OSPl11290 COSA#: Permit~: OSPl11274.
PID#: 015-243-03
Legal Description: Alpine Terrace Block 2 Lot 5
Engineer: Paul Hansen
Applicant: Paul Hansen
Your request for a waiver of the required 50 feet horizontal separation from the absorption field
to the excessiVe slope has been approved. The approved separation distance is 39.0 feet.
· This waiver approval applies to the proposed absorption field only. Any future upgrade to the
on-site wastewater disposal system will require all-separation diStances be met or another
approval from this department.
Waiver is Granted: X Waiver is not Granted:
Date: / t~/~,/~ /t . Approved. by: . Name of Reviewer j
Rec~: 00561C Amount: $200.00 Date Paid: 10/10/11
**** VARIANCE/WAIVER REVIEW ****
Municipality of Anchorage
Development Services Department
Building Safety Division
On-Site Water and Wastewater Program
4700 Elmore Road
P.O. Box 196650
Anchorage, Alaska 99507
www. muni.org/onsite
(907) 343-7904
ON-SITE SEWER/VVELL PERMIT APPLICATION
FOR A SINGLE FAMILY DWELLING
Parcel I.D.
Property owner(s). ~..~1'/(.~ ~. ~[ ~d'~,. ', . . , Da yp ~ hone
Mailing address, ~7~(:~'[~'~ ~{~,~/~J~,ZipCode
Site address {~( ~~ ~('j~ j~~C~,//~ipCode
Legal description (Sub d , Block & Lot. )~.(~1~~ ~ . ~(d~'~'~,, L~
Legaldescription(Township, Range & Section) ~/ ~~
cot s~ ¢% {G7 ~ sq. It. u~ o, ~o~oom~ . ,,~
THIS APPLICATION IS FOR (~] all that apply):
Absorption Field
Septic Tank
Holding Tank
Privy
Private Well
Water Storage
THIS APPLICATION IS AN:
Initial []
Upgrade '~
Renewal []
I certify that the above information is correct. I further certify that this application is being made for a
Single F.~.amily Dwelling and is in accordance with applicable Municipal Codes.
S, -nat '~e of ~ne'~r r '-~' "" (:~''~z~ I[~'L
( 'g lathe of p p rty o authorizeu ~gentl
Permit/Rush Fees:
Date of Payment:
Receipt Number:
Waiver Fees:
Date of Payment:
Receipt Number:
(Rev. 11/05)
11941 Hillside Drive
Anchorage, AK 99507
September 30, 2011
MOA Development Services Department
Building Safety Division
On-Site Water and Wastewater Program
4700 Elmore Road
PO Box 196650
Anchorage, Alaska 99507
Subject:
Permit Application for a Septic System Upgrade
Lot 5, Block 2, Alpine Terrace Subdivision
(11941 Hillside Drive, Anchorage, AK 99507)
Dear Sir or Madam:
Attached is my permit application for a new septic system at my home to replace the
original system installed in 1973, which has been limping along for several years.
My plan is to do the engineering and inspection work, as an Alaska Civil PE, and have a
certified installer do the installation or do it myself. I've been an Anchorage
civil/geotechnical engineer since 1970, becoming registered in 1974. In the 1970s, I
performed many perc tests and septic system inspections in the Anchorage area while
employed by ACLW/Alaska Testlab and on my own. I also attended your Engineers and
Excavators Class, taught by Dan Roth, on May 17, 2006.
Engineering work on the proposed system began in November 1998 when Denali Drilling
drilled the 19' test hole (TH1) and I logged the soils and installed a 16' piezometer.
Work resumed last year when I made field measurements, hand-dug a test pit (TP 1), and
did a percolation test. Although the backfilled test pit falls within the proposed trench
location, the disturbed soils will be excavated for the trench. The soil rating was 13
min/inch (0.8 gal/SF/day). However, in my design, the soil has been conservatively
derated to 0.6 gal/SF/day (16 min/inch) to increase the capacity and life of the system. In
addition, a diverter valve will be installed to allow flow to either the proposed system or
the existing system.
If you have any comments or questions about this application, I can be reached at 345-
7462 (H), 771-2245 (W), or paul2hansen~yahoo.com. Thank you.
Sincerely,
PAUL G. ItANSEN, P.E.
11941 HILLSIDE DRIVE
ANCHORAGE, AK 99507
(907) 345-7462 paul2hansen~yahoo.com
DESIGN OF SEPTIC SYSTEM UPGRADE
LOT 5, BLOCK 2, ALPINE TERRACE SUBDIVISION
Paul Hansen (Owner), 11941 Hillside Dr., Anchorage, AK 99507
This new septic system is to replace the original system installed in 1973.
Test Hole 1, 19' depth, drilled by Denali Drilling, logged by myself, 11/9/98
Groundwater, bedrock, and impermeable layers - none encountered
Groundwater after drilling (11/11/98, 10/2/10, 9/26/11) - none to 16' (piezometer depth)
Test Pit 1, approx. 2.5' x 5' x 4' deep, hand dug by myself, 10/6/10
Percolation test performed by myself, 10/10/10; soil zone tested - 4.6' to 5.2'
Soil rating - 13 min/inch. Use 16 min/in = 0.6 gal/SF/day (a more conservative design)
Use a standard deep trench; install a new septic tank at the existing tank location; disconnect and
leave the existing drainfield in place for future connection to the new system, if necessary, by
means of a diverter.
Number of bedrooms - 3
Septic tank required - 1,000 gallons. Use a steel tank, 12 ga., approx. 58" dia. x 8' long
Required trench area per MOA Table 3 - 750 square feet
Depth to bedrock or impermeable layers - greater than 19'
Depth to groundwater - greater than 16'
Top of washed rock - 3' depth
Bottom of washed rock - 10-1/2' depth
Total trench length required - 750/15 = 50'
Trench width - 2' nominal
Cover material (backfill) - 3'
Design elevations (approximate)
o Grade at new septic tank - Elev. 97.5'
o Septic tank outlet - Inv. Elev. 94.3'
o Grade at new trench - Elev. 93.5'
o Perforated pipe at new trench - Inv. Elev. 90.0'
o Bench mark - top of front stoop - Elev. 100.0' (assumed)
Soil cover over septic tank - 2.2' (approx), <4' so install insulation.
Use Dow HI 40; 5 ea. 2' x 8' x 2" boards (8' x 10' footprint).
Foundation wall to septic tank - approx. 9 LF; septic tank to trench - approx. 66 LF
Cleanouts - 1 at house, 2 at tank, 3 downstream, 2 at trench = 8 ea.
Monitoring tube - 1 ea. at end of trench
Installation of this septic system will not prevent installation of wells on adjacent lots, change the
general slope of the area, or create ponding or concentration of surface runoff. There are no
developed or natural drainage courses on this or adjacent lots, other than a drainage ditch on the
east side of Hillside Drive (about 49' from the drainfield pipe to the ditch centerline).
'LOT 2
LOT 3
LOT4 ~
L.lJ
I.I
TR. A
~'~ s~c
\SYSTEM
i ~, ,x ,
LOT 5
LOT 1
n
HILLSIDE
. , ~ - ~ LOT 6
I
LOT 1
~ ~ SEPTIC I
WELL.X% / xsYs'r~ ~
iF*3 I
I
× / ? i~
A~TNA AVE. ~
/
(CLASS ¢) I -" / I
~ . SEPTIC
VIEW SUB. ~ ~s~rr~
100' 100' 200'
SCALE: 1"=100'
EXISTING WELLS AND SEPTIC SYSTEMS
PAUL G. HANSEN, PE
11941 HILLSIDE DRIVE
ANCHORAGE, AK 99507
11941 HILLSIDE DRIVE, ANCHORAGE
PAUL NANSEN (OWNER)
SEPTIC SYSTEM UPGRADE
DATE: SEPT. 2011
SHEET 1 OF 3
I
EXISTING DRAINFIELD.I
(APPROX.), TO
REMAIN
I
I
~ 38'
~ 23'
, ~
NEW DRAINFIELD
TRENCH (50' LONG ~
DRIVEWAy
_.,~..,~,~..~1~' MIN. SETBACK
OF
Paul G. Hanse.
rt~". cE. ~7~o ...~*. ,
~,~......
PAUL G[' ~'~''~'''''-
HANSEN, PE
11941 HILLSIDE DRIVE
ANCHORAGE, AK 99507
N 89' 59' 20" W 149.97'
FUTURE OPTION (IF REQ'D)
CONNECT EXISTING DRAINFIELD
TO NEW SYSTEM USING A
DIVERTER (FIELD-LOCATE)
/7% SLOPE (+)
EXIST.
HOME
(3 ~.R.)
100' R
10' UTILITY EASEMENT
-- - ~ 89' 5~"-W 125.0'
-EXIST. 1,000 GAL SEPTIC
TANK TO BE PUMPED
AND REMOVED; NEW
TANK TO BE INSTALLED
AT SAME LOCATION
SITE PLAN
EXIST.
WELL
- ALATNA AVE. -
30' )' 30' 60'
11941 HILLSIDE DRIVE, ANCHORAGE
PAUL HANSEN (OWNER)
SCALE: 1"=30'
SEPTIC SYSTEM UPGRADE
DATE: SEPT. 2011
SHEET 2 OF 3
SEPTIC TANK
(1,000 GAL)
EXISTING
DRAINFIELD TANK CLEANI
(APPROX.) (TYP)
EXIST. HOME
(3 B.R.)
-CLEANOUT
/
CLEANOUT ~700'
4" /
(50' LONG x 10-1/2' DEEP)
MONITORING
TUBE
CLEANOUT
CLEANOUT
CLEANOUTS
4" SOLID PIPE (TYP)
FUTURE OPTION, IF REq'D
BULL RUN VALVE
(DIVERTER) CONNECTED
TO BOTH DRAINFIELDS
6" MOUNDED
BACKFILL
NATIVE BACKFILL
FILTER FABRIC
4' PERFORATED PIP
(HOLES DOWN)
WASHED ROCK
(1/2" - 2 1/2")
TYP TRENCH SECTION
NTS
SEPTIC SYSTEM LAYOUT &: TYP SECTION
NTS
PAUL G. HANSEN, PE
11941 HILLSIDE DRIVE
ANCHORAGE, AK 99507
11941 HILLSIDE DRIVE, ANCHORAGE
PAUL NANSEN (OWNER)
SEPTIC SYSTEM UPGRADE
DATE: SEPT. 2011
SHEET 3 OF 3
-,
7-
8-
9-
10-
11-
12-
13-
14-
15-
16-
17-
18-
19-
20-
Municipality of Anchorage /~.~" q~
~,~ Paul G Hanse..~
'~,~2: "~ ~7~0 ..~ , ·
[ ~ils.Log - Percolation Test 'l[~{~;;;id,~5~ / t
Pe~0~ed For: ~~ , Da, Pe~o~ed: .[~[~['
Development Services Department
Building Safety Division
On-Site Water and Wastewater Program
4700 Elmore Road
P.O. Box 196650 Anchorage, AK 99507
www.ci.anchora,qe.ak.us
(907) 343-7904
Slol~e
WAS GROUND WATER O .....
~.~~.~.oou.~ ~ I I I I, L I.I I i I I
IF YES, AT'WHAT DEPTH? ~ IOI ? I ~ (' r I J ~-- I I i I
DepthtO WaterAltert . ~'~'-~_ ~I _1 I I I I I ~ I I I I
, Monitoring?~'X,~)t' ~~a .I I I I I ! I I I I
II I I I Iii I I I I
' g,-r .q- lo,o
Reading Date Gross Time Net Time Depth ' Net Drop
(0,?..
4 ~'~ 'so ~,,~ rz.. g
PERCOLATION ~TE (minaeslin~) PERC HOLE D~METER
NOTE - The percolation test in TP1 was performed at a depth of 4.6 to 5.2 feet in soils representative of those
encountered in TH1 to the full absorption depth, 10-1/2 feet. The soils are glacial outwash deposits, basically silt with
varying amounts of sand and gravel. Occasionally the sand or gravel fraction exceeds the silt fraction.
11941 Hillside Drive
Anchorage, AK 99507
October 10, 2011
MOA Development Services Department
Building Safety Division
On-Site Water and Wastewater Program
4700 Elmore Road
PO Box 196650
Anchorage, Alaska 99507
Attention: Deborah Wockenfuss
Subject:
Request for a Variance - Slope Setback from >25%
Proposed Septic System Upgrade
Lot 5, Block 2, Alpine Terrace Subdivision
(11941 Hillside Drive, Anchorage, AK 99507)
Dear Ms. Wockenfuss:
On September 30, I submitted a permit application with my design for a septic system
upgrade at my home on Hillside Drive.
Please consider this a request for a variance from the requirements of AMC
15.65.060.A. 1 .b, which requires a wastewater disposal field to be located at least 50 feet
horizontally up-gradient from a change in slope to greater than 25%. Reference is made
to the MOA memo addressing this issue, dated April 7, 2004, by Mr. James Cross, PE.
My property fronts on Hillside Drive. The proposed drainfield location is about 49' from
an existing drainage ditch on the east side of the road. The attached cross section depicts
the situation. The ditch is approximately 19 feet wide by 3-4 feet deep. Its side slopes
are roughly 30 to 50%. The ditch remains dry for nearly the entire year, except during
breakup and heavy rains. The land between the drainfield location and the ditch is
wooded and vegetated, and nearly flat, sloping at approximately 2%.
To determine the geometry between the proposed drainfield (at the north end of the
trench) and the road ditch, where the ditch is lowest, I made the following measurements:
Distances from proposed drainfield pipe at north end of trench
Property line - 26'
Top of slope (east side of ditch) - 39'
Toe of slope (east side of ditch) - 45'
Centerline of ditch - 49'
Toe of slope (west side of ditch) - 53'
Top of slope (west side of ditch) - 58'
Edge of pavement, Hillside Drive - 61'
Centerline of Hillside Drive - 79'
Elevations (assumed)
Drainfield pipe, design invert - 90.0'
Top of slope (east side of ditch) - 92.3'
Center of ditch - 88.3'
Edge of pavement, Hillside Drive - 91.0'
About half of the ditch is located less than 50' from the proposed drainfield location. The
ditch's top of slope is 39' away; the toe is 45' away; and the centerline is 49' away.
However, the entire ditch will be more than 35' from the drainfield piping. The
calculated slope between the drainfield piping and the toe of slope is only 3.8% (1.7' in
45'). The hypothetical line at 25% slope cited in Mr. Cross's memo doesn't come close
to intersecting the shallow ditch. It appears that a waiver is needed because the change in
slope (>25%) is located within 50' of the drainfield. The proposed drainfield location is a
good one, and I do not wish to move it to the east.
In my opinion, a variance of the 50' separation distance is reasonable and will do no
harm for the following reasons:
The drop between the drainfield piping and ditch bottom is a minimal 1.7' over
45' horizontally. It is hard to imagine any seepage ocCUlTing at this low gradient.
o The west side of my existing drainfield is located a similar distance from the same
ditch. In 35 years, I have never seen any seepage in the ditch.
If you have any comments or questions about this application, I can be reached at 345-
7462 (H), 771-2245 (W), or paul2hansen~yahoo.com. Thank you.
(erely,
~~'~Pa/~n, PE
11941 Hillside Drive
Anchorage, AK 99507
October 10, 2011
MOA Development Services Department
Building Safety Division
On-Site Water and Wastewater Program
4700 Elmore Road
PO Box 196650
Anchorage, Alaska 99507
Attention: Deborah Wockenfuss
Subject:
Request for Homeowner Installation
Proposed Septic System Upgrade
Lot 5, Block 2, Alpine Terrace Subdivision
(11941 Hillside Drive, Anchorage, AK 99507)
Dear Ms. Wockenfuss:
On September 30, I submitted a permit application for a septic system upgrade at my home
on Hillside Drive. I understand that the Municipality of Anchorage allows the homeowner
to do the installation work instead of using a certified installer. This letter requests
permission to do so.
Summarizing my background, I've been an Anchorage civil/geotechnical engineer since
1970, becoming a PE in 1974. My experience over the years includes many earthwork
projects, large and small, both office and field. In the 1970s, I performed many percolation
tests and numerous inspections of new septic systems in the Anchorage area while
employed by ACLW/Alaska Testlab and on the side. I also attended your Engineers and
Excavators Class, taught by Dan Roth, on May 17, 2006.
I will be present and involved with the construction wOrk at all times. I plan to procure
materials and rent the necessary equipment from United Rentals, Totem Equipment &
Supply, or other company. Equipment will consist of a small excavator or backhoe loader
(John Deere, Case, or similar) to dig and backfill the trench and a skid-steer loader (Bobcat
type) to stage the washed rock. Several buddies from work, at least one of whom is
experienced with operating this equipment, will help me on a weekend. There will be no
exchange of money (fee) between any of them and myself for helping with construction.
If you have any comments or questions about this matter, I can be reached at 345-7462 (H),
771-2245 (W), or paul2hansen~yahoo.com. Thank you.
Sincerely,
GREA. R ANCHORAGE AREA BOR ,JGH
Department of Environmental Quality
3330 C Street
Anchorage, Alaska 99503
INSPF...CTION REPORT ON-SITE SEWAGE DISPOSAL SYSTEM
SEPTIC TANK:
NUMBER OF
COM PA RTM ENTS
LIQUID CAPACITY/¢;%"~GALLONS.
TILE DRAIN FIELD:
/ TOTAL LENGTH
DISTANCE FROM WELL /(~) FOUNDATION , NEAREST LOT ~ NE ~ OF LIN~S
NUMBER OF LINES'C~ -vt-7 . ,DIST,a.'~.CE BETWEEN LINES/ ~ i TRENCH WIDTH IN. TOTAL EFFECTIVE
WELL: ~
tYPE_ CONSTRUCTION --
DEPTH
/
BUILDING NEAREST NEAREST SEPTIC ~'(/'"-SE EPAG E
FOUNDATION__, LOT LINE , SEWER LINE .... TANK , SYSTEM
CESSPOOL
OTHER SOURCES
APPROVED DISAPPROVED REMARKS
DISTANCE FROM:
DISTANCES:
INSTALLED BY: '~
SEWER LINE DEPTH:
PIPE MATERIAL:
LOT SLOPE:
REMARKS:
DIAGRAM OF SYSTEM
Form EQ-032
PERMIT NO.
AF'F'L I E:ANT [.. ENN I =, W [:'O[:',SON.
L. OCAT I ON c[~F H'~ LLL'-7 ~ [:,E
LEGAL. L5 B2 ALPINE TERR
DEF'ARTMENT r"- HEALTH AND ENVIRONMENTAL. ' '"'OTECTION
25t6 E. dB, OR RE:,.., ANCHORAGE, RI.:::. ~..4:.37
276-2221
,' ',.~'6:~2 ;:, ~ ~
SRA BOX
LOT SIZE
]!: 4 4- ,:.1. 2 ::!!: 8
26000 SQL~RRE F'E:ET
'T'YPE OF SOIl_ RBSORBTION SYSTEbl IS: 'TRENCH
MAXIMUM NUMBER OF BE[:,ROOMS =
SO I L RAT I NG (SQ FT.-."BR ::, = t50
'T'HE REQUIRED SIZE OF THE SOIL ABSORPTION S'¢STEM IS:
[) E: F"'T H == '_-~- L.. EX i"-,t LTi T' H =-= ~ ,.Ti F~: R "-.-" E L_
[:. EZ F' -F H ==
THE LENGTH DIMENSION IS THE LENGTH (IN FEET::, OF THE TRENCH OR DRFIINFIEL. D.
THE DEPTH OF A TRENCH OR PIT IS THE DISTANCE BETWEEN THE SURFACE OF THE
GROUND AND ]"HE BOTTOM OF THE EXCAVATION ,::IN FEET).
THERE IS NO SET WIDTH FOR TRENCHES.
THE GRAVEL [:,EPTH IS THE MINIMUM DEPTH OF GRAVEL. BETWEEN THE OUTF:'ALL. PIF'E
AND THE BOTTOM OF THE EXCAVATION (IN FEET::,.
-r l...t IZ] ( 2 ) 1: i'-.I S F' E C: T I: i_.7.1 ~--,~ ~ t:t F=: E:. F-: E ,;! LI I F.: F£ [:,
BACKFILLING OF RN"r' SYSTEM WITHOUT FINRL INSPECTION RND RPPRO'v'RL B'¢ THIS
DEPAR. TMENT WILL BE SUBJECT TO PROSECUTION.
MINIMUM DISTANCE BETWEEN A WELL AND ANV ON-SITE SEHAGE DISPOSAl._ S'¢STEM IS
::LF~F~ FEET FOR R PR I',,,'ATE WELL OR 20R FEET FOR R PUBLIC WELL
SPECIFICATIONS AND CONSTRUCTION DIAGRAMS ARE AVAILABLE TO INSURE PROPER
I NSTALLAT I ON.
I CERTIFY THAT
t: I AM FAMILIAR WITH THE REQUIREMENTS FOR ON-SITE SEWERS AND WELL. S RS SE'I"
FORTH 8'¢ THE MUNICIPAL. IT'¢ OF ANCHORAGE.
2: I WILL. INSTFILL THE S'¢STEM IN ACCOR[.',RNCE WITH THE C:ODES.
'.]:: I UNDERSTAND THAT THE ON-SITE SEWER S'¢STEM MAY REQUIRE ENLARGEMENT IF' 'l"14E
RES ZDENC:E ZS REMODELED TO ~NCLUE:,E MORE THAN 3: BEDROOMS. , ,~ .~ /
S I G N E [:, ·
I SSLJED
RF'F'L I CRN"F [:,ENN I S W [:,O[:,SON ~¢
oGREA;....R ANCHORAGE AREA BOR(, ,_GH
Department of Environment Quality
3500 Tudor Road
Anchorage, Alaska 99507
INSPECTION REPORT ON-SITE SEWAGE DISPOSAL SYSTEM
MAILING ADDRESS ~)'
LEGAL DESCRIPTION
PHONE
SEPTIC TANK:
DISTANCE
FROM WELL/00/'~ MANUFACTURER
NUMBER OF /
MATERIAL ~~" COMPARTMENTS
LIQUfD DEPTH LIQUIrD CAPACITY/.~:~OO GALLONS.
INSIDE LENGTH
INSIDE WIDTH
TILE DRAIN FIELD:
DISTANCE FROM WELJOO FOUN?ATION
NUMBER OF LINES ,~' DISTANCE BETWEEN LINES
ABSORPTION AREA
DEPTH: TOP OF TILE TO FINISH GRADE
TOTAL LENGTH ~,
NEAREST LOT LINEZ0''~ '/'0 ~,) OF LINES ~ 7
DTH4~' IN
'/" TRENCH WI __ . TOTAL EFFECTIVE
MATERIAL BENEATH TILE. iN. ABOVE TILE ,~, IN.
WELL:
TYPE ~O-/
CONSTRUCTION
DEPTH DISTANCE FROM:
BUILDING ~ NEAREST w
FOUNDATION , LOT LINE__,
CESSPOOL , OTHER SOURCES
APPROVED
DISAPPROVED
NEAREST
SEWER LINE__
SEPTIC /, SEEPAGE
TAN K/O~) ' ,~q~SYSTE M
REMARKS
DISTANCES:
SEWER L, NE DEPTH= C z/'
PIPE MATERIAL:
LOT SLOPE: ~) }P~0~¢~''
REMA R KS:/g~,2/7:~'~, iZ~- :
Form PW~027
DIAGRAM OF SYSTEM
DATE ~7~~'APPROVED
GReATEr ANCHORAGE ArEa BOrOUgh
DEPARTMENT OF ENVIRONMENTAL QUALITY
3330 "C"" STREET ANCHORAGE, ALASKA 99503
TELEPHONE 274-4561
SEWAGE DISPOSAL SYSTEM APPLICATION AND PERMIT
PERMIT NO.
INSTALLATION lOCATiOi~N
LEGAL DESCRiPTiOn
INSTALLATION OF: SEPTIC TANK
TYPE AND SIZE OF FACILITY TO BE SERVED
FINANCED THROUGH
SOIL TEST RESULTS
SEEPAGE Pit i ' DRAIN FIELD OTHER
TO BE INSTALLED BY ~l~
NOTE~ T~S PEE~IT IS NOT VALID WITHOUT SOIL
COMPLETION DATE ANTICIPATED
FINAL INSPECTION: 24 HOUR NOTICE REQUIRED. BACKFILLING OF ANY SYSTEM WITHOUT FINAL INSPECTION BY THE
DEPARTMENT OF ENVIRONMENTAL QUALITY AUTHORITY WILL BE SUBJECT TO PROSECUTION.
SEPTIC TANK SIZE
DRAIN FIELD
MINIMUM DISTANCES, REQUIREMENTS
FOUNDATION TO SEPTIC TANK O~' I
FOUNDATION TO SEEPAGE PIT ~0/
SEPTIC TANK TO SEEPAGE PIT WALL /5 /
SEPTIC TANK SEEPAGE PIT , DRAIN FIELD
TO NEAREST LOT LINE.
WELL TO SEPTIC Tank //00 [ , SEEPAGE PIT /~ /
DRain Field /_~ / aLSO CONSIDER AREA WELLS.
WATER MAIN TO SEPTIC TANK //~) , SEEPAGE Pit ~/ DRAIN FIELD ~ 0 ¢
SEPTIC TANK, ~- I ,/~ / ~/~/1~ /
, SEEPAGE Pit , DRAIN FIELD
TO RIVER, LAKE, STREAM.
CAST IRON INTO AND OUT OF SEPTIC TANK AND INTO CRIB CROSSING GAP Of
EXCAVATION 5 FEET INTO UNDISTURBED SOIL.
4 INCH DIAMETER CAST IRON SIPHON PIPES ON SEPTIC TANK AND SEEPAGE Pit
FITTED WITH AIRTIGHT REMOVABLE CAPS.
GRAVEL BACKFILL
CONFORM TO BOROUGH REGULATIONS REGARDING INSTALLATION.
G.A .A .B.
OR
LICENSED DESIGNER
DIAGRAM OF SYSTEM
I CERTIFY THAT I AM FAMILIAR WITH THE REQUIREMENTS OF GREATER ANCHORAGE AREA BOROUGH ORDINANCE NO. 28-68 AND THAT THE ABOVE
DESCRIBED SYSTEM IS IN ACCORDANCE WITH SAID CODE.
FORM ~0,
Mi
GREATER ANCHORAGE AREA BOROUGH
DEPARTMENT OF ENVIRONMENTAl QUALITY
3330 "C" Street
ANCHORAGE, ALASKA 99503
Case #
Performed For ...... ~ ~/t~l~F~zBlock Dated Performed ~-~.-. 73
Legal DescriptioFF~: Lot Subdivision ~ ~
This Form Reports Soils Log Percolation Test
- Soil Test Must Be-Logged To 4' Below Proposed Seepage System -
Depth
Soil Characteristic~
Feet
lll/i t
I S° L_LL J_
III-FI-
10~ ~~-~~
13~
Was Ground Water Encountered?
If Yes, At What Depth?
l i
Reading Date
Percolation Rate
Gross Time I Net Time Depth to H20
I
1'4 i n u i: e
Proposed Ins~-l-T'~-t-{"~i:F: Seepage Pit Drain Field
Depth of Inlet D .... th to Bottom of Pit Or Trench
COMF~ENTS:
Net Drnp
[)ate Certified
Da 1: e: _~_~J~-
GREATER ANCHORAGE AREA BOROUGH
DEPARTMENT OF ENVIRONMENTAL QUALITY
3330 "C" Street
ANCHORAGE, ALASKA 99503
Case #
Performed For ~\,~ ~,,~,g-~-.~ Dated PerformedA,_ ~Z//~/?~
Legal Description: Lot ~-- Bl dck ~ Subdivision_fll~';,~-[~~
This Form Reports Soils Log ~ Percolation Test__
- Soil Test Must Be Logged To 4' Below Proposed Seepage System -
Depth
Feet Soil Characteristics
9~
10~
11~
12~
13~
~~s~7'~" Ground Water Encountered?
If Yes, At What Depth?
Reading Date Gross Time Net Time Depth to H20 Net Drop
Percolation Rate Minute
Proposed Installation: Seepage Pit Drain Field
Depth of Inlet Depth to Bottom of Pit or TrencF----'
COMMENTS: /S-o/,/~z/~.~ F,
Test Performed
Date Certified BY:
Date ·
MUN[Ct~ .... , r ,~
!') E [>A [~ TM E N'F O F E N V i R () N M !{ N'f'A i. O U A I_ I ¥ Y
2 t ~0,,.,-(:,~-at, ecl. An(:horag(h Alacka 99503 .... 274~4561:'
25!8 'Tudo~ 7
REQUEST FOR APPF~OV/:,L OF
ENVIk&4,,;Mi: N h:'J F'¢:O ~ [ (~ ~ tON
OCT '- ?. 1976
RECEIVED
INDIVIDUAL SEWER and VVA'T[7 R FAC;I LITi'-e, ~:,.,
1. Ty.pe of Inspection:
2. Property Owner:
Mailing /~,dd tess:
3. Name of Buyer:
CMRO ................ VA FFIA CON'v'
Day Phone "]
Mailing Address:
4. Name of Lendhlg Irs:itution: ~ ,/~L..~-~
Mailing Address: ..... _/~_._~_:_?._2'_¢_' Z .......................... Phone
Mailing Address: ...................................................... Phane
Day Phone
7. Type of Facility to be inspected: ......................................................................... No. Bdrms ..... ~..... ...........
8. Water Supply
Type of Supply: Public Utility ................... individual
If Individual, number of dwellings present:iy serw:;d
I'f Individual, depth of well
9, Sewage Disposal S,/s[em
Type of System' Public ULii[ty ......................... individual (on-site)
If Indiv;dual.. date of installation
EQ.037 (1 !'14)
\~l II.l~/~ Department of Environmental Quality
,,c,, ?ree,, nc,ora e,
IA"'~ "~' ~~~ Date Received October ~,1976
~ ~J "~ ~~ Time of Inspection II,~J
/.~s4, ~ ~ ~ REQUEST FOR APPROVAL OF
~1.
~D.~.Q~ ~s~ INDIVIDUAL SENER & ~ATER FACILITIES
~/ M~'~-PF~' Cony. ,
1. Approval requested by: National Bank of Alaska % Ruth
Mailing Address: Post Office Box 3-3859
Phone: 279-2506
2. Property Owner:
Mailing Address:
Dennis Dodson
Phone: 344-4238
3. Legal Description: Lot 5 Block 2 Alpine Terrace
4. Location:
NHN Hilltop Drive
5. Type of facility to be inspected
6. Well Data: Individual
Single Family
No. of bedrooms 3
A. Type B. Depth
C. Construction D. Bacterial Analysis
Sewage Disposal System: On-site system
A. Installed ~Xe~~/~//7~B. Installer
C. Septic Tank: 1. Size /~-~ 2. Manufacturer
D. Seepage Pit: 1. Absorption Area J/'~O~ 2. Material
E. Disposal Field: Total length of lines
Be
Distances:
A. Well to: Septic tank
Nearest lot line
Absorption area
, Other contamination
, Sewer Lines
B. Foundation to septic tank
, Absorption area
C. Absorption area to nearest lot line
EQ-034 (1/74) Page 1 of two pages
Page2of two pages - Req it for Approval of Individual S ,r & Water Facilities
Legal Description Lot ~ Block 2 Alpine Terrace
Comments
Approved
~.~~_:~~_.y~mv Disapproved
/
Approval Valid for one year from date signed
Greater Anchorage Area Borough, Department of Environmental Quality
DIAGRAM OF SYSTEM
I certify that the information contained in this request for approval to be a true and
accurate representation of the subject sewer and water facilities and these facilities
are operating satisfactorily.
SIGNED
Date
EQ-034 (1/74)
Department of £nvtronmenta! Quality
3500 Tudor Road, Anchorag, ska 99507 279-8686
Dat~ of Inspection
REQUEST FOR APPROVAL OF
INDIVIDUAL SF~WER & WATI~R FACILITIES
FOR
A~prov,1 Requested By: /~
Address ~ Phone
7. Sewage Dis~osal.System~ ~,
D. Seepage P~%, 1. Size 2.
Distances:
A. W~I! ~0, Septic Tankl~_~_.___, Absorption Area
, Nearest Lot Line_ ~,~, ~,_ Other Contamination
Foundation to Septic Tank ~ I "> AbSorption Area
-
Absorption Area to Nearest Lot I. ine
, Sewer Lines
Approval Valid for One Year From Date S~gned
Greater Anchorage Area Borough, Department of Environmental Quality
DIAGRAM OF SYSTE~
I certffv that the information contained in this request for approval to be a true
and accurate representatt, on of the subiect sewer and water facilities located at:
Signed Data