HomeMy WebLinkAboutSIEFKER #2 LT B-3Onsite File
Siefker #2
Lot B-3
#015-272-16
10/16/2020
August 28, 2020
Municipality of Anchorage
Development Services Department
On-Site Water and Wastewater Section
4700 Elmore Road
Anchorage, Alaska 99507
Re: Well and Septic Upgrade for Lot B-3 Siefker #2 Subdivision
To whom it may concern:
This existing 3-bedroom home is served by a private well and septic system. The existing system is a log
crib drainfield and concrete tank installed in 1968 as described in the original 1968 MOA permit. This
drainfield has failed and is not capable of absorbing effluent from the septic tank. This is unsuitable for
a 3-bedroom home.
I am the owner of this home and am a Professional Engineer licensed in the State of Alaska experienced
with on-site and community/municipal water and wastewater systems.
This system will be installed and sized to also accommodate future expansion of the home to 4
bedrooms. All components are designed and will be installed in accordance with the latest revision of
AMC 15.65.
1. Soils
a. Soils in the area have been demonstrated to be gravelly sand types suitable for an
application rate of 1.2 gallons/day/square foot from modern percolation testing on
adjacent or nearby lots, including:
i. Siefker #2 Block B-4 Lot 1
ii. Siefker #2 Lot A5-B
b. Based on the latest revision of AMC 15.65 this application rate may be used for this
design.
c. Groundwater has not been encountered in historic test holes on adjacent or nearby
properties, including bore logs:
i. SW2635D001
ii. SW2635D003
iii. SW2635C004
iv. SW2635C005
v. SW2635C006
2. Septic Tanks
a. The existing tank will be reused in conjunction with a new tank to increase retention
time.
b. The existing tank is sound, being of concrete in construction and verified by inspection.
c. The existing tank has 4 feet of soil cover and will also be insulated with 2” of rigid
insulation placed over the tank.
d. The proposed tank will be 1250 gallons in size to accommodate potential future
expansion of the home to 4 bedrooms.
e. A minimum of 4 feet of soil cover will be placed over the new 1250-gallon tank as well
as 2” rigid insulation.
3. Proposed Drainfield
a. The required effective area for a 4-bedroom home based on a 1.2 gallons/day/square
foot using 600 gallons per day design flow is 500 square feet.
b. The proposed drainfield will be a deep trench system with 6-foot effective depth.
c. The proposed trench dimension is 60 feet in length by 3 feet in width.
d. Effective area for this proposed trench is 720 square feet.
e. The drainfield will have a minimum of 4 feet of soil cover.
f. All piping will be 4” PVC meeting the requirements of AMC 15.65.
4. Surface Waters
a. There are no surface waters within 100’ of this system
5. Topography
a. The slopes for the area the system will be installed in are in accordance with AMC 15.65.
Sincerely,
Trevor Trasky, PE
Attachments:
System upgrade plan and section – 2 pages
!NSPCTION ??EI?O
RT- ON-SITE SEWAGE DIS't�c,r,i,
tame / �TE/� �C"r� 7` % Mailing Adnress 47 X
Location r P C f �� AJ
�i c f Qdr"�q ft�Cy-Legal--Descripti
on g • fa
SEPTIC TANK: Distance from well — — - —
�' Material t!J,. Number of compartments
Liquid capacitY221 Inside length .,, Inside width Liquid depth g_ "
h
SEEPAGE SYSTEM: Seepage Pit: Number of pits�/ _Outside diameter or
Width. length; depth__(, lining material� Distance from
well building foundation_/(t)3 ! , nearest lot line '. Total effective
absorption area (wall area) 132, sq. ft.
TILE DRAIN FIELD: Distance from well - , foundation , nearest lot line
Total length of lines Number of lines Distance between lines Trench
width in. Total effective absorption area ;sq. ft. Length of each line
Depth; Top of tile to finish grade Depth of filter material beneath
the in. Above Mile _
WELL: Typel��C�., depth distance from building foundationf , nearest
lot line l
j_ a, nearest sewer line , septic tank �'j� 31 �, seepage system .
cesspool.other sources
-SYSTEM- =—
DISTANCES: —DISTANCES:
A,9` 93r
A - f =
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'71
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103
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ft 4'
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DATE, ) ,
APPROVED � l
Health Authority .
i
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Name of Applicant
Residence Address
AGE DISPOSAL SYSTEM - APPLICATION 6 PERMIT
Mailing Address%%�, Ph. #
%f0 Location of Installation
_ Legal Description. r'!4/ %�% � � .n/� / `J1---------------
„1��-�l/
Application to Install: Septic tank, Seepage pit
To Serve the Following Facility
Financed Through To be Installed by
i
Percolation Test Results Anticipated Date of Completion
BELOW TO BE FILLED OUT BY -HEALTH DEPARTMENT
This is to serve as'fi 1 ,permit to install
� 1';as described below.
.Size of unit to be serv�eX'±d
Septic tank size jZ Type Seepage Area. Typeice
(�5
DIAGRAM OF SYSTEM
,A' DISTANCE• - -
yvk3n1 too'
.9
Health Authority
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.
TELL LOG
Date Drilled: 8-17-88
Static mater Level 14.5 feet Gallons Per Minute
Draw Down N -A feet Total Feet of Casing _179
Type Material Drilled:
0 feet to
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HEFTY DRILLING
3540 AKULA DRIVE
ANCHORAGE, AK 99516
(907) 345-0593
HEFTY DRILLING
3540 AKULA 9FUVE
ANCHORAGE, AK 9956
(907) 345-0593
8164
SL320/01320 FOR REFERENCE
CARBONLESS
HEFTY DRILLING
3540 AKULA DRIVE
ANCHORAGE, AK 99516
(907) 345-0593
ger Minute '
at of Casing -l'79
MUNICIPALITY OF ANCHORAGE
.44
Development Services Department 317,:) Phone: 907-343-7904
On-Site Water & Wastewater Section - Fax: 907-343-7997
Certificate of On-Site Systems Approval
Parcel I.D. 6 15'(9-7 9-1(o Expiration Date: /(---i_ '--- / 9
1. GENERAL INFORMATION
Complete legal description Siefker #2, Lot B3 aka SE1/4NE1/4Sec51 T12NR3W
Location (site address) 11425 Jerome St, Anchorage
Current property owner(s) Heirs of Peter Scott Day phone 907 830 6467
Mailing address PO Box 220182, Anchorage AK 99522
Real estate agent UNK Day phone
2. TYPE OF DWELLING:
❑ Single Family (w/wo ADU)
❑ Duplex
❑ Multiple Dwellings (Single Family and/or Duplex)
3. NUMBER OF BEDROOMS: 3
4. TYPE OF WATER SUPPLY: TYPE OF WASTEWATER DISPOSAL:
Private Well 4- Private Septic g_
Water Storage ❑ Holding Tank ❑
Community Well ❑ Community ❑
Public Water System ❑ Public Sewer ❑
Waiver request for: Release COSA to Peter Scott
q Distance:
Received by: %191
VA- Date: 61 .2 ' -/7
COSA to be released to the engineer,unless otherwise requested by the engineer.
COSA Fee $ 55V Waiver Fee $
Date of Payment 'l I(o l Q Date of Payment
Receipt Number 4 21460 q U Receipt Number
COSA# 8509 1602 Waiver#
5. STATEMENT OF INSPECTION BY ENGINEER
As certified by my seal affixed hereto and as of the validation date shown below, I verify that my investigation, based
on procedures outlined in the Certificate of On-Site Systems Approval Guidelines for this application, shows that the
on-site water supply and/or wastewater disposal system is (are) safe, functional and adequate for the number of
bedrooms and type of structure indicated herein. I further verify that based on the information obtained from the
Municipality of Anchorage files and from my investigation and inspection, the on-site water supply and/or wastewater
disposal system is (are) in compliance with all applicable Municipal and State codes, ordinances, and regulations in
effect at the time of installation. I acknowledge that On-Site staff may visit the site to verify the information submitted.
Name of Firm Theta Environmetal & Engineering Phone 907 242 0755
Address 660 S. Maney Dr, Wasilla AK 99654
Engineer's Printed Name Ronald E. Godden Date 7/15/19
elf Nittri
6. DSD SIGNATURE
)1 System #1 Approved for —1 bedrooms )1 OP,' •• :*
System #2 Approved for bedrooms •• 1'
;.;RONALI E , i
•
Disapproved 1' ,
Conditional approval for bedrooms, with the following stip+1a;k'••,;•••••.,'"
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'` �C Original Certificate Date: ?S 1
The Municipality of Anchorage Development Services Division (DSD) issues Certificates of On-Site Systems Approval (COSA)based only upon the
representations given in paragraph 5 by an independent professional civil engineer registered in the State of Alaska. The Municipality of Anchorage is
not responsible for errors or omissions in the professional engineer's work.
7. ATTACHMENTS:
COSA Checklist X Nitrate Advisory
Septic System Advisory Arsenic Advisory
Well Flow Advisory Other
COSA Checklist blue sheet
COSA Checklist
Legal Description: Siefker#2LotB3 aka SE1/4NE1/4Sec51T12NR3W Parcel ID:
If more than 1 septic system on lot: COSA Checklist# 1 of 1 Structure served by this system 1
A. WELL DATA
❑Well log is filed with Onsite (or attached) Well production at time of test 4.52 gpm
Date drilled Unk Water storage tank volume30 gallons
Total depth 180 ft 1 Well disinfected for coliform test? ❑ Yes ■❑ No
Cased to GT30 ft 6 4-CR\r2\' t0 , ❑t Coliform bacteria is Negative
❑ Sanitary seal is functioning correctly Nitrate 2.37 mg/L ❑ Nitrate less than MRL (ND)
❑■ Wires are properly protected Arsenic ug/L ❑� Arsenic less than MRL (ND)
Casing height (above ground) 16.2 in. Collected by R. Godden
Date of flow test for COSA 6/19/19 Date of Sample 6/19/19
Static water level at beginning of test 10.4 ft
Comments
B. TANK DATA C. LIFT STATION
Age of tank(s) 51 years ❑ Required maintenance completed
Tank type/material Concrete Age of lift station years
Measured operating fluid level in septic tank 6.9 ft Lift station material
Standpipes/foundation cleanout per record drawing Comments: N/A
Date of pumping 6/19/19
D. ABSORPTION FIELD DATA
Which system tested (date installed) 9/25/66 Adequacy test date 6/19/19
❑� ALL standpipes present per record drawing Results ID Pass For 3 bedrooms
Total measured depth from grade 14.8 ft (max) Fluid depth prior to test 69.8 in
Measured depth to pipe invert from grade UNK ft(min) Water added 538 gal
❑ N/A—pressurized field
New depth 79 in
■❑ Monitor tubes go to bottom of effective. If not, state Elapsed time 1440 min
depth into effective 69.8
0 Code-required soil cover over field Final fluid depthin
GT 450
❑■ System presoaked Absorption rate gpd
(Required if vacant for greater than 30 days prior to Any rejuvenation treatment (past 12 months) Unk
date of test)
Gallons introduced 1,000 gallons If yes, enter date
Comments/Deficiencies:
COSA Checklist yellow sheet
E. SEPARATION DISTANCES
From Private Well on Lot to: (Please enter distances if less than required or if community well)
Septic Tank/Lift Station on Lot > 100' Community Sewer Manhole/Cleanout> 100'
❑Yes if No 93 ft 0 Yes if No ft
Neighboring Tank > 100' 0 Yes if No ft Private Sewer/Septic Line >25' 0 Yes if No ft
Absorption Field on Lot> 100' 0 Yes if No ft Holding Tank> 100' 0 Yes if No ft
Neighboring Absorption Fields > 100' Animal Containment > 50' 0 Yes if No ft
0 Yes if No ft
Manure/Animal Excreta Storage> 100'
Community Sewer Main > 75' 0 Yes if No ft 0 Yes if No ft
From Septic/Holding Tank on Lot to: (Please enter distances if less than required)
Building Foundations > 10' 0 Yes if No ft Surface Water> 100' 0 Yes if No ft
Property Line >5' 0 Yes if No ft Wells on Adjacent Lots:
Absorption Field > 5' 0 Yes if No ft Private Wells > 100' 0 Yes if No ft
Water Main > 10' El Yes if No ft Community Wells > 200' El Yes if No ft
Water Service Line > 10' 0 Yes if No ft If septic tank is under driveway comment below
From Absorption Field on Lot to: (Please enter distances if less than required)
Building Foundation > 10' 0 Yes if No ft If absorption field is under driveway comment below
Property Line > 10' El Yes if No ft Wells on Adjacent Lots:
Water Main > 10' El Yes if No ft Private Wells > 100' D Yes if No ft
Water Service Line > 10' 0 Yes if No ft Community Wells >200' 0 Yes if No ft
Surface Water> 100' 0 Yes if No ft
F. ENGINEER'S COMMENTS
Required seperation distance between well and septic tank was 50 feet at time of installation.
G. ENGINEER'S CERTIFICATION
defiCION ,
I certify that I have determined through field inspections and review
of Municipal records that the above systems are in conformance with
MOA COSA guidelines in effect on this date. r,
an i 11 •!
• . • ........
COSA Checklist yellow sheet
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NOTES:
I.EXCEPTING FOR GROSS NEtSIGENCE.THE UABILTTY FOR THS SURVEY SHA1J.NOT'CTEED THE COST OF PREPARPEG THIS SURVEY.
2.TH6 SURVEY REPRCSDITS MOLE IMPROVEMENTS&CONDITIONS ON THE GATE OF SURVEY.
3.THIS DOCUMENT DOSS NOT CONSTITUTE A BOUNDARY SURVEY&IS SUBJECT TO ANY INACCURACIES THAT A SUBSEQUENT BOUNDARY SURVEY MAY DISEASE.
4.THIS SURVEY PERFORMED FOR PETEÐEL SCOTT.R SHOULD ONLY BE USED FOR A SINGLE PROPERTY TRANSACnoN.
EXC.LSION NOTE IT IS THE RESPONSIBILITY OF THE O'VI- TO DETERMINE THE 0957ENCE OF ANY EASEMENTS.COVENANTS,OR RESTRICTIONS WHICH DO NOT APPEAR ON THE
RECORDED SUBDR!SEON PLAT.UNDER NO CIRCUMSTANCES SHOULD ANY DATA HEREON BE USED FOR CONSTRUCTION OR FOR FSTASJSHIRG BOUNDARY OR FENCE LIR S.
"A FARMER SURVEYING
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9131 E. FRONTAGE RD.
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10615-s �;' � I HEREBY CERTIFY THAT A MORTGAGE INSPECTION WAS PERFORMED
:= UNDER MY DIRECTION ON THE FOLLOWING DESCRIBED ROPERIY:, 4/ TA.
mLSEFKER SUBDMSIONNr2OTB-3PLATNo. P11ht ��TuANCHORAGE
G DISTRICT, ANCHORAGE.� '/9 SURVEYED ON THE 23
OF JULY, 2019. a•2019