HomeMy WebLinkAboutTIMBER RIDGE #1 BLK 3 LT 6Onsite File
#050-321-51
At time of COSA, well shall be
documented and updated as-built survey
provided.
Municipality of Anchorage
Community Development Departmem` 1 of 4
On -Site Water & Wastewater Program NOV A A zoig
4700 Elmore St. • P.O. Box 196650 Anchorage, AK 99519-6650 • hftp://www.muni.org/onsite • (907)343-7904
ON-SITE WASTEWATER INSPECTION REPORT
Permit Number: OSP191204 PID Number: 050-321-51 ❑ New ■ Upgrade
Name:
BRAIN AND MARY TRIMBLE
ABSORPTION FIELD
■ Deep Trench ❑ Shallow Trench ❑ Bed ❑ Mound
Address:
19430 UPPER SKYLINE DRIVE, EAGLE RIVER, AK 99577
❑ Other
Phone: No. of Bedrooms:
Soil Rating:
Total Depth from original grade:
947-1220 4 (SEPTIC SIZED FOR 5)
0.6
***SEE LETTER
GPD/Sq. Ft
Ft
LEGAL DESCRIPTION
Depth to pipe invert from original grade:
Gravel depth beneath pipe:
SEE DWG. Ft
***8 ± Ft
Subdivision: Block: Lot:
Fill added above original grade:
Gravel length:
TIMBER RIDGE #1 3 6
SEE DWG.
80' (2 @ 40' LONG EACH),
FL
Township: Range: Section:
Gravel width:
Beds Number of lines:
Distance between lines:
***2'0+ FL
—
Ft
SEPARATION
DISTANCES
Total absorption area:
***
128
umber of trenches:
2
Dist between trenches:
r
16±
To
Septic
Absorption
Lift
Holding
Public/Private
From
Tank
Field
Station
Tank
Sewer Lines
so. Ft
Ft
well
100'+
100'+
-
-
25'+
TANK ■ Septic ❑ S.T.E.P. ❑Holding ❑ Other
Manufacturer.
Capacity.
Surface Water
100'+
100'+
-
-
INFILTRATOR
1530
Gal.
Lot Line
5'+
10'+
-
-
N/A
Material:
Number of compartments:
HDPE/PLASTIC
2
LIFT STATION
Foundation
10'+
10'+
-
-
Curtain Drain
NONE KNOWN
Manufacturer.
c
Gal.
Remarks: ***SEE ATTACHED LETTER REGARDING
"Pumpon"levelat
"Pump ofr" level at
High water alarm at
THE DOCUMENTATION OF THE 1998 DRAINFIELDS
Pump Make & Model
Electrical Inspections performed by.
****EXISTING PIPING APPEARED TO BE D3034 PIPE
PIPE MATERIAL
D3034 D3034
House to tank (FOR NEW) Tank to (FOR NEW)
drainfield
Installer *2019 TANK - GREEN GENERAL
**1998 DRAINFIELD - STRATA EXCAVATION
Drainfield ****EXISTING CO/MT D3034
Inspector GEG, Ltd.
BENCH MARK (Assumed elevation)
100.00 Ft
Inspection
Location and Description:
Dates: 1st *7/12/2019 2nd **4/7/1998
3rd **4/8/1998 4th **4/9/1998
TOP OF SONOTUBE CLOSEST TO NEW SEPTIC TANK
Community Development Department Approval
ENGINEER'S SEAL
..••"�°°
OF
Conditional approval:Date:
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Inspection Report _1-1-12doc + /1
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GARNESS ENGINEERING GROUP, Ltd
ENGINEERING SALES <, CONSULTING -- _- - _-- -=
October 28, 2019
Municipality of Anchorage
Development Service Department
On -Site Water & Wastewater Program
4700 Elmore Road
Anchorage, AK 99507
Ref: Documentation of Septic Tank Upgrade and 1998 Drainfields for
Timber Ridge S/D #1; Block 3, Lot 6
To whom it may concern:
Q,uan 03".
AUvjnCCd T.-catrncnt SyStcm
D - -
On June 6, 2019, a Onsite Wastewater Disposal System Permit was issued for the referenced
property (Permit # OSP191204). GEG, Ltd has performed inspections on the new septic tank
installation and inspected the installation of the new monitoring tubes in the 1998 drainfields.
We inspected the southeast end of the drainfields while the top of drainrock was exposed for
installing the 2" steel monitoring tube. The 2" steel monitoring tubes were installed in the
southeast end of each trench by Stewart Gilbert. Per Mr. Gilbert, the 2" steel monitoring tubes
were driven to 8 feet below the distribution line and then met resistance. The drainrock
appeared to meet MOA specification and filter fabric was found over the drainrock. In regard to
the original grade elevation, it is unknown at this time; however, based upon our site visits while
the southeast end of the drainfields were exposed, it appears the original grade was
approximately 2 feet higher than the invert elevation. in short, it appears the drainfields
maximum depth was approximately 10 feet and it appears the 1997 design criteria was followed
during the original drainfield installation. The northwest of the drainfields appear to have settled
and the monitoring tubes on the northwest end of drainfields also appear to have been installed
too deep. Both distributions lines were jetted and cleaned by MW Sewer & Drain during the
excavation and documentation of the drainfields. Based upon these limited inspections, we have
provided you an inspection report and record drawings for the new tank upgrade and the 1998
drainfields.
If you have any clyestions, please contact us at 337-6179. Thank you for your assistance.
Jeff"rey�A�l V ' ess, E., M.S.
PresidentI V
3701 East Tudor Road, Suite 101 * Anchorage, Alaska 99507-1259
Phone: (907) 337-6179 * Fax: (907) 338-3246 * Website: www.garnessengineering.com
PERMIT NUMBER: PARCEL ID NUMBER:
OS0191204 RECORD DRAWING 050-321-51
1
1
I
TIMBER RIDGE #1; BLOCK 3, LOT 7
I
loo, w I
VERIFFL p lUS (APPRO
ARAT/ON �/SIMATE�
NOTE: THE OLD STEEL SEPTIC TANCF
TANK WAS EXCAVATED,
REMOVED, AND DISPOSED
OFFSITE PER THE CONTRACTOR
15' UTILITY EASEMENT /
I—
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INSTALL FOUNDATION CLEANOUT—�
I �
EXISTING TRENCHES. TRENCHES WERE
NOT DOCUMENTED DURING INSTALLATION.
TRENCHES APPEAR TO BE INSTALLED
ACCORDING TO APPROVED 1997 DESIGN.
INSPECTIONS WERE CALLED IN TO MOA
' ONSITE DEPARTMENT AND IT ASSUMED AN
ENGINEER PERFORMED THESE
INSPECTION DURING THE INSTALLATION.
/ GP�
ROBERT C.
COWAN,
P.E.'S TH#2
G
': bRIVE
EXISTING
Wq� .:.,...
1 GARAGE
1 r�
EXISTING
�4BEDROOM
HOUSE. SEPTIC
SIZED FOR 5
BEDROOMS.
1—NEW 1530 INFILTRATOR
2 -COMPARTMENT SEPTIC TANK
=OUND OLD FLOW SPLITTER (FS) AND
EXTENDED STANPIPE ABOVE GRADE
EXISTING
WELL
-NEW 2" STEEL MONITORING TUBES WERE INSTALLED ON THE SOUTHEAST
END OF EACH TRENCH. DEPTH OF DRAINROCK WAS APPEARS TO BE 8 FEET
IN BOTH TRENCHES BASED UPON DRIVEN DEPTHS OF MONITORING TUBES.
TIMBER RIDGE #1; BLOCK 3, LOT 5
GARNESS ENGINEERING GROUP9 Ltd
-- - -- ENGINEERING SALES CONSULTING 7---_ _ -
3701 E. TUDOR ROAD. SUITE 101 • ANCHORAGE, AK 99507 -PHONE (907)337-6179 - FAX (907)338-3246 * WEBSITE: www.gamessengineedng.com
CLIENT: PHONE NUMBER: PAGE NUMBER:
BRIAN TRIMBLE 907-947-1220 2 OF 4
PROJECT/LEGAL DESCRIPTION: DRAWN BY:
TIMBER RIDGE S/D #1; BLOCK 3, LOT 6 J.L.M.
TYPE OF WORK: DATE:
� RECORD DRAWING OF SEPTIC TANK UPGRADE 10/28/2019
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PERMIT NUMBER: PARCEL ID NUMBER:
OSP1912O4 RECORD DRAWING 050-321-51
TOP
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INVERT OF
INLET =
GARNESS ENGINEERING GROUP, Ltd
ENGINEERING SALES o CONSULTING
3701 E. TUDOR ROAD, SUITE 101 -ANCHORAGE, AK 99507' PHONE (907) 337-6179' FAX (907) 338-3246' WEBSITE: w .gamessengineenng.00m
CLIENT: PHONE NUMBER: PAGE NUMBER:
BRIAN TRIMBLE 907-947-1220 3 OF 4
PROJECT/LEGAL DESCRIPTION: DRAWN BY:
TIMBER RIDGE S/D #1; BLOCK 3, LOT 6 J.L.M.
TYPE OF WORK: DATE:
� RECORD DRAWING OF SEPTIC TANK UPGRADE 10/28/2019
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PERMIT NUMBER: RECORD
C O 1\® ®1 A /, / I 1 Y G PARCEL ID 050-321-51 BER:
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`DOCUMENTATION NOTES: GEG, LTD. INSPECTED THE SOUTHEAST END OF THE DRAINFIELDS WHILE THE TOP OF DRAINROCK WAS EXPOSED FOR INSTALLING THE
2" STEEL MONITORING TUBES. THE 2" STEEL MONITORING TUBES WERE INSTALLED IN THE SOUTHEAST END OF EACH TRENCH BY STEWART GILBERT. PER MR.
GILBERT, THE 2" STEEL MONITORING TUBES WERE DRIVEN TO 8 FEET BELOW THE DISTRIBUTION LINES AND MET RESISTANCE. IN SHORT, THE DRAINFIELDS
APPEAR TO BE INSTALLED ACCORDING TO THE DESIGN IN REGARD TO THE EFFECTIVE DEPTH. THE DRAINROCK APPEARED TO MEET MOA SPECIFICATIONS AND
FILTER FABRIC WAS FOUND OVER THE DRAINROCK. IN REGARD TO THE ORIGINAL GRADE ELEVATION, IT IS UNKNOWN AT THIS TIME; HOWEVER, BASED UPON OUR
OBSERVATIONS WHILE THE SOUTHEAST END OF THE DRAINFIELDS WERE EXPOSED, IT APPEARS THE ORIGINAL GRADE WAS APPROXIMATELY 2 FEET HIGHER
THAN THE INVERT ELEVATION. IN SHORT, IT APPEARS THE MAXIMUM DEPTH AT THE SOUTH ENDS OF THE DRAINFIELD IS ROUGHLY 10 FEET BELOW ORIGINAL
GRADE. THE NORTHWEST OF THE DRAINFIELDS APPEAR TO HAVE SETTLED AND THE MONITORING TUBES ON THE NORTHWEST END OF DRAINFIELDS ALSO
APPEAR TO HAVE BEEN INSTALLED TOO DEEP. BOTH DISTRIBUTIONS LINES WERE JETTED AND CLEANED BY MW SEWER & DRAIN DURING THE EXCAVATION AND
DOCUMENTATION OF THE DRAINFIELDS.
FINAL GRADE •MT1 C01
= 83.58-83.99, MT�2
FINAL GRADE 'MT3 CO3 ORIGINAL GRADE IS
= 80.12-82.21 � MT�4 � /UNKNOWN. SEE NOTE.
FILTER FABRIC
INVERT OF PIPE
AT CO3 = 77.00,
INVERT OF PIPE
AT C04 = 76.63,
MATELY 1
BOTTOM OF'MT3 = 69.07
BOTTOM OF MT4 = 67.69
- ORIGINAL GRADE IS
UNKNOWN. SEE NOTE.
FILTER FABRIC
INVERT OF PIPE
AT C01 = 78.64,
INVERT OF PIPE
AT CO2 = 78.58,
BOTTOM OF'MT1 =70.69
BOTTOM OF MT2 = 69.28
GARNESS ENGINEERING GROUP, Ltd
- - — -= =-- ENGINEERING= SALES o CONSULTING
3701 E. TUDOR ROAD, SUITE 101 -ANCHORAGE, AK 99507' PHONE (907) 337-6179' FAX (907) 338-3246' WEBSITE: www.gamemengineering.00m
CLIENT:
PHONE NUMBER:
PAGE NUMBER:
BRIAN TRIMBLE
907-947-1220
4 OF 4
PROJECT/LEGAL DESCRIPTION:
DRAWN BY:
TIMBER RIDGE S/D #1; BLOCK 3, LOT 6
J.L.M.
TYPE OF WORK:
DATE:
�_ RECORD DRAWING OF DRAINFIELD DOCUMENTATION
10/28/2019
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LICENSE,111��`S`00• ••
#AECC884
MUNICIPALITY OF ANCHORAGE
On -Site Water & Wastewater Program
PO Box 196650 4700 Elmore Road
Anchorage, Alaska 99519-6650 Phone: (907) 343-7904 Fax: (907) 343-7997
http://www,muni.org/onsite
On -Site Wastewater Disposal System Permit
Permit Number: OSP191204
Work Type: Septic Upgrade
Tax Code Number: 05032151000
Site Legal Address: TIMBER RIDGE #1 BLK 3 LT 6 G:0255
Site Mailing Address: 19430 UPPER SKYLINE DR, Eagle River
Owner: TRIMBLE BRIAN A & MARY B
Design Engineer: GARNESS ENGINEERING GROUP LTD
This permit is for the construction of:
Effective Date:
Expiration Date:
Lot Size in Sq Ft:
Total Bedrooms:
T, !1t'
�o `�<'..
L}eparrmettt
6/6/2019
6/5/2020
88091
Q Disposal Field R Septic Tank ❑ Holding Tank ❑ Privy ❑ Private Well ❑ Water Storage
All construction shall 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 in The engineer shall notify the Development
Services Department per AMC 15.65. Provide notification by calling (907) 343-7904 (24/7).
4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather
shall be either:
a. Opened and Closed on the same day, or
b. Covered, sealed, and heated to prevent freezing
Received By:
'
Date:'
Issued By:
Date:
to A,
5
pa Z�
MUNICIPALITY OF ANCHORAGE
Community Development Department Phone: 907-343-7904
Development Services Fax: 907- 343-7997
On -Site Water & Wastewater Program
Mayor Dan Sullivan
On -Site SewerMell Permit Application
For A Single Family Dwelling
Parcel I.D. 0 SD " 3 Z r-''fi_L—
Property owner(s) BRIAN AND MARY TRIMBLE Day phone 907-947-1220
Mailing address 19430 UPPER SKYLINE DRIVE, EAGLE RIVER, AK 99577
Site address 19430 UPPER SKYLINE DRIVE, EAGLE RIVER, AK 99577
Legal description (Sub'd, Block & Lot ) TIMBER RIDGE #1; BLOCK 3, LOT 6
Legal description (Township, Section & Range)
Lot Size
APPLICATION IS FOR:
TYPE OF DEWELLING:
(® all that apply)
Single Family (SF)
Absorption Field
Upgrade ®
Septic Tank
Holding Tank
❑
Privy
❑
Private Well
❑
Water Storage
❑
Sq.Ft. Number of Bedrooms 4 (SIZED FOR 5)
APPLICATION IS AN:
TYPE OF DEWELLING:
Initial ❑
Single Family (SF)
Upgrade ®
(w/wo ADU)
Renewal
Duplex (D)
El❑
Multiple Dwellings
❑
(SF and/or D)
THIS APPLICATION INCLUDES A VARIANCE/ WAIVER REQUEST FOR:
NONE Distance: —
I certify that the above information is correct. I further certify that this is in accordance with
applicable Municipal codes.
GARNESS ENGINEERING GROUP, Ltd.
(Signature of property owner or authorized agent)
Permit/Rush Fees: t5 -q5-
Date of Payment:
Receipt Number: Ae�l �� a�
Permit No. U"
Waiver Fees:
Date of Payment:
Receipt Number:
Waiver No.
(Rev. 01111)
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP191204, Rebecca Carroll, 06/06/19
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP191204, Rebecca Carroll, 06/06/19
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Onsite File
T49 Ift 0 a
imber Ria !3 e
t
of
Anchorage,_
Department of Health and Human Services
825 "L" Street
Rick Mystrom, P.O. Box 196650 Anchorage, Alaska 99519-6650
Mayor
http://www.ci.atichorage.ak.us
343-4744
July 23, 1998
Brian A & Mary B Trimble
19510 Third Street
Eagle River, Alaska 99577 8421
Subject: Lot 6 Block 3 Timber Ridge Subdivision #1
Permit #SW970192, PID #050-321-51
The subject permit, issued July 16, 1997 by this office for a
single family well and/or on-site wastewater system, has
expired as of July 16, 1998.
A new permit must be obtained from this office for a well
and/or on-site wastewater system NOT installed by the
expiration date.
If you have drilled the well, a well log must be sent to
this office for documentation of the installation and to
close the permit.
If a licensed Professional Engineer has inspected the
installation of the on-site wastewater system, the original
as -built inspection report must be sent to this office for
review, approval and documentation. All inspection reports
must be submitted within 30 days of construction completion.
When applying for a new permit, the fees are: $320.00 for an
on-site wastewater permit; $120.00 for a well permit and
$440.00 for a combined on-site wastewater and well permit.
If you have any questions, please call this office at 343-4744.
Si efely,
A
Ja es boss P �
Pr gram Manager
On-site Services
enc: Copy of Permit
cc: S & S Engineering
A10A CoP'
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND HUMAN SERVICES
P.O. BOX 196650, 825 "L" STREET, ROOM 502
ANCHORAGE, ALASKA 99519-6650
ON-SITE WELL AND WASTEWATER DISPOSAL SYSTEM PERMIT
PERMIT NUMBER:SW970192
DESIGN ENGINEER:S & S ENGINEERING
OWNER NAME:TRIMBLE BRIAN A & MARY B
OWNER ADDRESS:19430 UPPER SKYLINE DR
EAGLE RIVER, ALASKA 99577
PARCEL ID:05032151
LEGAL DESCRIPTION:
TIMBER RIDGE #1 BLK 3 LT 6
LOT SIZE: 88092 (SQ. FT.)
NUMBER OF BEDROOMS: 5 THIS PERMIT: 5
THIS PERMIT IS FOR THE CONSTRUCTION OF:
DISPOSAL FIELD /SEPTIC TANK / WELL SYSTEM
ALL CONSTRUCTION MUST BE IN ACCORDANCE WITH:
c�v-1 S
i(la*0c ca�' �of
L -I .-7 . q8
PAGE 1 OF 1
DATE ISSUED: 7/16/97
EXPIRATION DATE: 7/16/98
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 ENGINEER MUST NOTIFY DHHS AT LEAST 2 HOURS
PRIOR TO EACH INSPECTION. PROVIDE NOTIFICATION BY
CALLING 343-4744 ( 24 HOURS ) . (NOT REQUIRED FOR WELL ONLY PERMIT)
4. FROM OCTOBER 15 TO APRIL 15 A SUBSURFACE SOIL
ABSORPTION SYSTEM UNDER CONSTRUCTION DURING FREEZING
WEATHER MUST BE EITHER:
A. OPENED AND CLOSED ON THE SAME DAY
B. COVERED, SEALED AND HEATED TO PREVENT FREEZING
5. THE FOLLOWING SPECIAL PROVISIONS.
SPECIAL PROVISIONS:
RECEIVED B
ISSUED BY:
DATE: 76 -7 / Iq %
DATE: _
S&S
HEALTH AUTHORITY
APPROVALS
SEWER & WATER
MAIN EXTENSIONS
SEWER & WATER
INSPECTION
ENGINEERING STUDIES
AND REPORTS
WELL INSPECTION
& FLOW TEST
SITE PLANS
ROAD DESIGN
SOIL TEST
PERCOLATION
TEST
STRUCTURAL&
MECHANICAL
INSPECTIONS
ON SITE
WASTEWATER
DISPOSAL SYSTEM
DESIGN
ROBERT C. COWAN, P.E.
ROBERTA. SHAFER, P.E.
CIVIL ENGINEERS
(907) 694-2979
June 13, 1997 FAX (907) 694-1211
MUNICIPALITY OF ANCHORAGE
Department of Health and Human Services
P.O. Box 196650
Anchorage, AK. 99519
REFERENCE: Lot 6, Block 3, Timber Ridge S/D
Request you issue a permit to drill a well and install a
septic system to serve the proposed five bedroom house on
the referenced property.
Test holes were excavated and percolation tests performed.
The approximate location of the test holes are located on
the attached site plan.
At the time of excavation no water was encountered in the
test holes. After seven day ground water monitoring, the
monitoring tubes were found to be dry.
This property has enough area for a future septic upgrade
which can be seen on the attached site plan.
We do not anticipate any adverse effects on neighboring
wells, septic systems or drainage patterns by the
installation of the proposed septic system.
If you require additional information, please contact us.
Sincerely,
Robert C. Cowan, P.E.
RCC/mg
Enclosure
MUNICIPALITY OF ANCHORAGE
ENVIRONMENTAL SERVICES DIVISION
JUN 18 1997
17034 NORTH EAGLE RIVER LOOP • SUITE 204 ^ EAGLE RIVER, ALASKA 99577
1" = GU'
SCALE
SITE PLAN
DESIGN
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® Municipality of Anchorage
DEPARTMENT OF HEALTH & HUMAN SERVICES
825 "L" Street, Anchorage, Alaska 99502-0650 "" �•'
SOILS LOG — PERCOLATION TEST
PERFORMED FOR: �&6�j 112iMaIZ D PERF MED::. J l
LEGAL DESCRIPTION: i t 9' " l�Mf3PR �1�t2 /bTownship, Range, Section:
SLOPE SITE PLAN
('fdl'6w Ics.
o 6r4�s
rGROUD WATER
OUNTENtED?
S
oIF YES, AT WHAT L
/ O
DEPTH? P
E
Depth to Water Afte
Monitoring? 13 & Date: Y
Reading Date Gross
Time
Net
Time
Depth to
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Drop
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its
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PERCOLATION RATE 46 (minutes/inch) PERC HOLE DIAMETER
TEST RUN BETWEEN _ _ FT ANDI-2— FT
COMMENTS
17034 Eagle River Loop oa p.
PERFORMED BY: Eagle River, Alaska 99577 I
ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELII
72-008 (Rev. 4/85) e
CERTIFY THAT THIS TEST WAS PERFORMED IN
THIS DATE. DATE: S - 2 -7
(ENGINEER'S SEAL)
Municipality of Anchorage
DEPARTMENT OF HEALTH & HUMAN SERVICES
825 "L" Street, Anchorage, Alaska 99502-0650
SOILS LOG —PERCOLATION TEST
PERFORMED FOR: IZIM�&E DATE PER ORM
LEGAL DESCRIPTION1.4 jh�, Township, Range, Section:-....._•
DEI,�H SLOPE SITE PLAN
(FEET) Qjj(yj}rgG$
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4v/ Savrrzr Ca�ts�
GROUND WATER N6
IF YES, AT WHAT
DEPTH?
Depth to Water Aflel ,
Monitoring? V— Date:
S 1 °
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DepthWater
• ..
PERCOLATION RATE/�� (minutes/inch) PERC HOLE DIAMETER
TEST RUN BETWEEN - LJFT AND 5 FT
COMMENTS L--►./ I V VtI-T`r111i^-1 vrr
S & S ENGINEERING
17034 Eaule Rivet Loop Road '
204
PERFORMED
le River Alaska 9957'
��
ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDEL14
72-008 (Rev. 4/85)
' CERTIFY THAT THIS TEST WAS PERFORMED IN
ON THIS DATE. DATE: _ 2 y c
HEALTH AUTHORI~t
APPROVAL~
SEWER&WATER
MAJN EXTENSIONS
SEWER & WATER
INSPECTION
ENGINEERING STUDIES
AND REPORTS
WEll INSPECTION
& R.OW TEST
ROAD DESIGN
SOILTEST
ON-SITE WASTEWATER DISPOSAL SYSTEM
CONSTRUCTION PRACTICES
and
MATERIAL SPECIFICATIONS
ROBERTC. COWAN, RE.
ROBERTA. SHAFER, RE.
CML ENGINEERS
(907) 694-2979
FAX (907) 694-1211
REFERENCEs Lot 6, Block 3, Timber Ridge Subdivision
January 14, 1997
GENERAL:
1.
®
e
The scope of this project includes the installation of
a 1500 gallon septic tank and a leachfield trench to
serve the proposed five bedroom residence located on
the referenced property.
Construction shall be in accordance with the approved
site plan and design drawings, Municipal pe=mit with
any special provisions or conditions, and all
applicable State and Municipal Wast.water Disposal
Regulations.
The contractor shall be responsible for obtaining any
necessary underground utility locates.
Unless specifically agreed otherwise, the property
owner shall be responsible for final grading areas
subsequently depressed from soil settling.
Contractors installing wastewater disposal systems
must be certified by the Municipal Bealth Department
for system installations. Owners installing their own
systems must also receive prior approval from the
Municipal Health Department.
SEPTIC TANK INST~.X.~TION:
P[RCOtATION
TEST
STRUCTURAL &
t'~SPECTIONS
me
A septic tank is to be constructed by a certified
septic tank manufacturer. Construction shall include
two 4" cleanouts for pumping access.
The septic tank shall be sufficiently bedded to
prevent settling or shifting of the tank.
Ail standpipes on the septic tank shall extend a
minimum of 12 inches above final grade.
ON SITE
W~TEWATER
J:NSPOSAL SYSTEM
DJ[SIGN
17034 NORTH EAGLE RIVER LOOP * SUITE 204 · EAGLE RIVER. ALASKA 99577
Page Two
Lot 6, Block 3, Timber Ridge Subdivision
January 14, 1997
Septic tanks installed with less than 4 ft. of cover shall
be insulated.
A foundation cleanout shall be installed one to four feet
from the building foundation. In the line between the tank
and the leachfield there shall be two adjacent cleanouts
(unless an effluent pumping system exists within the septic
tank). These cleanouts shall be located on undisturbed
soil not more than 10 ft. from the tank. The first
cleanout, in line, shall be to clean toward the leachfield.
The second cleanout shall be to clean toward the septic
tank.
Final grading over the septic tank shall be such that a
positive slope exists away from the septic tank.
ABSORPTION TRENCH/DRAINFIELD INSTALLATION:
Excavate the proposed trench to the dimensions shown on the
design. The bottom of the excavation shall be within 2
inches of level. If the sidewalls of the excavation become
smeared, they must be raked or scratched (ruffed-up) before
gravel (sewer rock) placement.
®
Once the gravel is installed, the distribution pipe is to
be installed level with the perforations faced downward.
Gravel is then to be placed over the distribution pipe to
provide a minimum of 2 inches of cover over the pipe.
A silt barrier must be installed between the final gravel
layer and the native soil backfill. Ensure the silt
barrier covers the entire gravel, surface before placing
backfill.
Monitor tubes shall be of four (4) inch diameter,
installed approximately in the locations shown on the
design, and extend a minimum of 12 inches above final
grade. The portion of the monitoring tube extending
through the gravel shall be perforated from the bottom of
the trench to the invert of the distribution pipe. This is
equivalent to the effective depth of the gravel as noted on
the design.
Page Three
Lot 6, Block 3, Timber Ridge Subdivision
January 14, 1997
Backfill over the final gravel layer must not be less than
twenty-four (24) inches. Insulation must be installed when
the backfill depth is less than thirty-six (36) inches.
The finish grade over the trench must be mounded to prevent
the fo~matlon of a depression after settling.
MINIMUM MATERIAL SPECIFICATIONS:
Any septic tank proposed for installation must be
constructed by a Municipally approved septic tank
manufacturer.
The following pipe materials are approved for use in septic
system installations in the Municipality of Anchorage:
TVDe of Pipe
Perforated Solid
Cast Iron
ASTM D3034 (PVC)
ASTM F810 (HDPE)
ASTM D2662 (ABS)
Yes Yes
Yes Yes
Yes No
Yes Yes
Use of a type of pipe other than listed above must be
approved by the inspecting engineer.
Insulation shall be at least 2" thick extruded direct
burial polystyrene (Dow Chemical Company Styrofoam HI or
equal).
Septic tank inlets and outlets shall be fitted with
watertight couplings (Caulder, Fernco, or equal).
A permeable nontoxic silt barrier (Typar 3401, Mirafi 140N,
or equal) must be installed between the final leachfield
gravel layer and the native soil backfill.
Ail leachfield gravel (sewer rock) shall be 0.5"-2.5"
screened gravel with less than 3% passing the #200 sieve.
When sand is being used as a filter material, its gradation
specifications must conform to current M.O.A. or D.E.C.
requirements, which ever requirement applies.
Page Four
Lot 6, Block 3, Timber Ridge Subdivision
January 14, 1997
INSPECTIONS:
Typically there will be a minimum of three (3) inspections
required during the installation of the wastewater disposal
system. These inspections will occur as follows:
The first inspection must be conducted after the
excavation of ditches, pits, trenches, or beds and
before the installation of any gravel. A septic tank
may be set in place, but may not be backfilled before
this inspection.
me
The second inspection must be conducted after the
placement of the silt barrier, gravel, distribution
lines, standpipes, cleanouts, and insulation, but
before the placement of any other backfill.
The final inspection is to occur upon final grading of
the property.
Often there will be more than these 3 inspections required.
Especially with the installation of multiple trenches, sand
filters, pressurized distribution systems, etc. Thus, the
inspecting engineer is to be contacted at least 24 hours prior
to the start of construction. If necessary, a pre-construction
meeting will take place on-site. The inspecting engineer will
not coordinate, direct or control in any way the contractors
activities.
The owner shall contract with the contractor to perfo=,, the work
outlined in these specifications and plans and in accordance
with the attached M.O.A. pe~',~t. There will be no contractual
arrangement existing between the contractor and S & S
Engineering. S & S Engineering shall be the owner's
representative and will inspect the work as stated above to
document the contractors activities. Final acceptance of the
contractors work rests with the owner and the M.O.A.
Page Five
Lot 6, Block 3, Timber Ridge Subdivision
January 14, 1997
S & S Engineering shall have no liability to the owner or to
others for acts or omissions of the contractor or any other
persons perfozming work on this project or the failure of the
contractor to carry out the work in accordance with these
construction documents. S & S Engineering's inspecting engineer
will not be responsible for the construction means, methods,
techniques, sequence, procedures or the safety precautions
incident to this project.
CONTRACTOR/INSTALLER
