HomeMy WebLinkAboutDENALI HEIGHTS LT 5Denali Heights
Lot 5
#068-021-02
Municipality of Anchorage
a
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Ig..
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Development Services Department ..- ='" ;_
Building Safety Division _-- —_
On Water & Wastewater Program, 4700 South Bragaw St.
-Site
P.O. Box 196650 Anchorage, AK 99519-6650
www.ci.anchorage.ak.us (907) 343-7904 Page 1 of 3
On -Site Wastewater Disposal System and/or Well Inspection Report
Permit Number. SW030157 PID Number 068-021-02
Name: MARK ROBINSON
Wastewater System: ■ New • Upgrade
Address:
1120 HUFFMAN ROAD * ANCHORAGE, AK 99515
ABSORPTION FIELD
Phone: No. of Bedrooms:
(907) 351-7926 4
O Deep Trench ■ Shallow Trench CI Bed O Mound OOther
LEGAL DESCRIPTION
sole Rating: 0 8 cpDTotal
n.
Depth from original rode:/sq.
4.5 MAX a
Block: Lot: Subdivision:
— 5 DENALI HEIGHTS
Depth to pipe bottom from original grad.:
SEE DWG. rt.
Gravel depth b.n.ath pip.:
3.5 ft
Township:....Range: Section:
— —
PM added above original grad.:
SEE DWG. Ft.
Grovel length:
93 ft
WELL: 0 New 0 Upgrade
Gavel width:
5.0 Ft.
Number of Snow
1
Distance between In..
—
Ft.
Clamincation (PrNat., .9.C):
PRIVATE
Total Depth:
285 n.
Cased To:
285 n.
Total ob.aytion tarso:
861 so. PL
Pipe material:
D 3034/ F-810
Didier:
M—W DRIWNG, INC.
Date Dr1Nd:
6/27/2003
Static Water Level:
180.5 Ft.
Installs:
AKWWC, INC.
Dat. Installed:
6/3-4/2003
Tiekk
4 CPM
Pump Set At
— F.
Casing Height Above Ground:
3 R
TANK
SEPARATION DISTANCES
■Septic t7Holding 0S.T.E.P. 0Other
To
From
Septic
Tank
Absorption
Field
Lift
stat on
Holding
Tank
Pub&/Prtvat.
s.w.r LIN.
Monuf oat
ANCHORAGE TANK
Capacity In gall on.:
1250
Well
100'+
100'+
-
-
25'+
STEEL
Numberof comportments:
2
Surface Water
100'+
100'+
—
—
—
LIFT STATION
Lot Line
5'+
10'+
—
—
-
„
� �
Foundation
5'+
10'+
—
—
-
'Pump on I.v.l at
"'Pump off at
High water alarm at:
Curtain Drain
KNOWV
Pump Mab b
Electrical Inspections performed by:
NONE
Remarks:
BENCH MARK
DESIGN CHANGE APPROVED BY DAN ROTH
Location and Description:
BOTTOM OF SEPTIC TANK
ON 6/2/2003.
Mourned e.vation: 95.67 Ft
ENGINEER'S S
O`
%*�•' •4 l `
` ••-57:*��O
AKWWC, INC.
Inspections performed by Dates: 1st 6/3/2003
....
f:...
• . eff a
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d0dPt0
OO000O�..
.
79
aSSIOC°a��
Q
o
: ss• GI
.••' •,(Pva
2nd 6/3/2003
3rd 6/4/2003
Development Servi
Reviewed and approved by:
es Department Approval
Date:—
(R.v. 12/01)
'
1
/
A I
le.•;;;.
TOP OF
CUTBANK
••
•
NEW 1250 CAU_ON
SEPTIC TANK
AV
A
ST1
416.07
378.04
ST2
420.61
373.48
DBL1
422.43
372.29
DBL2
423.42
371.45
CO1
425.73
390.30
MT1
426.38
388.44
CO2
352.09
487.96
MT2
356.70
356.70
CULVERT
ALASKA WATER & WASTEWATER
------- CONSULTANTS, INC.
;or 1
•
r"
3701 E. TUDOR ROAD. SUITE 101 • ANCHORAGE. AK 09507 • PHONE (007)337-6170 • FAX (907)338.321.6
DATE:
6/13/2003
DRAWN BY:
C.J.G.
SCALE:
1" = 60'
PREPARED FOR:
MARK ROBINSON
PHONE NUMBER:
(907) 351-7926
PACE NUMBER:
2 OF 3
LEGAL DESCRIPTION:
DENALI HEIGHTS SUBDIVISION; LOT 5,
TYPE OF WORK:
AS -BUILT DRAWING OF NEW SEPTIC SYSTEM
MUNICIPALITY OF ANCHORAGE
Development Services Department
On -Site Water & Wastewater Program
4700 South Bragaw Street
P.O. Box 196650, Anchorage, AK 99519-6650
(907) 343-7904
qz-9 -- I Z N
(BIZ_ -Ord - S �tiv
ON-SITE WASTEWATER DISPOSAL SYSTEM / WATER SUPPLY PERMIT
Initial
Permit Number: SW030157
Legal Description: DENALI HEIGHTS SUBDIVISION LOT 5
Design Engineer: 0041 AK Water & Wastewater Consultan.
Owner Name: MARK ROBINSON
Owner Address: NHN COTTOM GRASS DRIVE
EAGLE RIVER , AK 99577 -
Date Issued: May 28, 2003
Expiration Date: May 27, 2004
Parcel ID: 068-021-02
Site Address: NHN COTTON GRASS DRIVE
Lot Size: 202685 SQ. FT.
Total Bedrooms: 4 Permit Bedrooms: 4
This permit is for the construction of:
❑✓ Disposal Field ❑✓ Septic Tank ❑ Holding Tank ❑ Privy ❑✓ Private Well ❑ 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 engineer must notify DSD at least 2 hours prior to each inspection. Provide notification by calling
(907) 343-7904 (24 hours ). ( Not required for a Water Supply Permit only ).
4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather
must be either. A. Open and closed on the same clay.
B. Covered, sealed, and heated to prevent freezing.
5(24to--c1: crtIleo) A.. I -s; N Ct4Acc
SMileJ-,- . dur {4 I.jA-k-z_ ScreArc
S�, o Int l
LI h1 c/14' ;1.0 c triA5c.
Received By:
Issued By:
wzx
C �.►. c ?-n c --JA . bei )v N it,
1/ /o eNcRvn 4,-c� /1,2c,
Lrit', t is -Lu; (.- s>! �i�•
Date• 5'29'03
Date: s/z8/03
•
Municipality of Anchorage
Development Services Department " .
Building Safety Division
On -Site Water & Wastewater Program
4700 South Bragaw St.
P.O. Box 196650 Anchorage, AK 99519-6650
,,_v www.ci.anchorage.ak.us441fte<4
(907) 343-7904 4
SEWER/WELL PERMIT APPLICATION
FOR A SINGLE FAMILY DWELLING
Parcel I.D. 068-021-02
Property owner(s) MARK ROBINSON
Mailing address (1) 1120 HUFFMAN ROAD * ANCHORAGE. AK
Permit Number 5(P03015-7
Day phone 351-7926
#e king address (2) NHA/ COTTON 1rRF SS DRIVE, 99577 Zip Code 99515
Legal description (Lot, Block & Sub'd) LOT 5. DENALI HEIGHTS SUBDIVISION
Legal description (Section, Township & Range) NCA
Lot Size 20 z, 6 8S Acr=./Sq.Ft. Number of Bedrooms 4
THIS APPLICATION IS FOR:
Sewer Only
Sewer and Well
• Sewer Upgrade
Well Only
Water Storage
THIS PROPERTY CONTAINS:
Hot Tub 0 Jacuzzi
Swimming Pool 0 Water Softening Unit
Therapy Pool 0
0
I certify that the above information is correct. I further certify that this application is being made for a
Single Family Dwelling and is in accordance with applicable Municipal codes.
ALASKA WATER & WASTEWATER CONSULTANTS, INC.
KUSI-kli
+
Permit Fees: 550 +$150 Waiver Fees*
Date of Payment: 27 MAY 2003 Date of Payment:
Receipt Number: 3GD25 Receipt Number.
ALASKA. WATER &- WASTEWATER
Ms= CONSULTANTS, INC. +aMIPIINIKOMMAYMIIMP•1611/1,411MOIN
May 23, 2003
Municipality of Anchorage
Development Service Department
Building Safety Division
On -Site Water & Wastewater Program
P.O. Box 196650
Anchorage, Alaska 99519-6650
Ref: Proposed Well and Septic System for Lot 5, Denali Heights Subdivision
To whom it may concern:
The proposed 4 bedroom house will be served by a private well and septic system. Two test
holes were excavated on the property. The septic system will be designed around the 30 foot
radius of these test holes. We are proposing that a new 1250 gallon septic tank and also a deep
trench type drainfield be installed. Comments regarding the design are summarized as follows:
1. SOILS: See the attached log which shows the soil classifications, groundwater monitoring,
and the percolation test results. It is our opinion that due to the overall appearance of the soils, an
application rate of 0.6 gallons/day/ft2 should be used.
2. TRENCH DESIGN:
a. Percolation Rate: 5 & 30 minutes/inch
b. Proposed Application Rate: 0.6 gallons/day/ft2
c. Number of Bedrooms: 4
d. Design Flow: 600 gallons per day
e. Minimum Absorption Area: 1000 ft2
f. Total Depth: 11 feet (max.)
g. Effective Depth: 7 feet
h. Width: 2.5 feet
i. Reduction Factor: N/A
j. Minimum Length: 75 feet total length
k. Effective absorption area = 1050 ft2
3. SURFACE WATERS: There are no surface waters within 100 feet of the proposed
upgrade.
3701 E. Tudor Road, Suite 101 * Anchorage, AK 99507
Ph: (907) 337-6179 * Fax: (907) 338-3246 * Website: akwwc.com
' 4. TOPOGRAPHY: The majority of the lot is a 25+ percent slope. A pad has been excavated
into the hill and the excess dirt was put on the downhill side of the pad to create a slope of less
than 25 percent. The drainfield will be installed 50+ feet from any slope greater than 25 percent.
We request a 35 foot waiver from the alternate site to a slope greater than 25 percent.
I am unaware of y adverse impacts this installation would have on adjacent wells or septic
systems. If you ave any questions, please contact us at 337-6179. Thank you for your
assistance.
rel
e tr
Presi e
E., M.S.
NOTE: Attached is a site plan drawing, a design drawing, two soils log, and a 7 page
construction specification letter which are all part of the design package for this septic system.
3701 E. Tudor Road, Suite 101 ' Anchorage, AK 99507
Ph: (907) 337-6179 * Fax: (907) 338-3246' Website: akwwc.com
SUN VALLEY NORTH S/D;
LOT 5. BLOCK 4
CS2
SUN VALLEY NORTH S/D; �I
LOT 6, BLOCK 4 Et;
9
SEPTIC ON W
END OF LOT
SUN VALLEY NORTH S/D;
LOT 8, BLOCK 4
,rI
<1
1
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1
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01
VI
0'
UI
1
$
1
DENALI HEIGHTS
S/D; LOT 6
WELL ON NORTH
END OF LOT
PROPOSED SEPTIC SYSTEM
(SEE DESIGN PACE 2 OF 2)
R T
vLw...•;
ttx
a+•»,
:'}7c
.1'4.1211'
71t.
CUTBANK
49.2%4.
: y ,s' ALTERNATE SITE
.a1
s:4r
'OS •
PROPOSED
4 BEDROOM
HOUSE
CULVERT
DENALI HEIGHTS
S/D; LOT 6
WEAND SEPTIC )
SOULL H END OF LOT 1
.......-..--CONSULTANTS, AST(._....T._..--....- --
ALASKA WATER&«ASTL�`ATLR
NC.
6901 DESARR ROAD. SUITE 20 • ANCHORAGE. AK 99504 • PHONE (907)337.6179 • FAX (907)338.3246
PREPARED FOR
MARK ROBINSON
PHONE NUMBER:
351-7926
DATE:
5/23/2003
DRAWN BY:
C.J.G.
SCALE:
1" = 100'
PAGE NUMBER:
1 OF 2
LEGAL DESCRIPTION:
DENALI HEIGHTS SUBDIVISION; LOT 5
TYPE OF WORK:
SITE PLAN FOR PROPOSED WELL LOCATION AND SEPTIC SYSTEM
ay.—
PROPOSED WELL
CHUGACH STATE PARK
TOE OF
SLOPE
PROPOSED DRAINF1ELD.
EXCAVATE A TRENCH THAT IS
11 FEET DEEP MAXIMUM BY
2.5 FEET WIDE BY 75 FEET
LONG. ADD 7 FEET OF CLEAN,
WASHED SEWER DRAINROCK.
ALTERNATE SITE
TOP OF
CUTBANK
NSTALL DOUBLE
CLEANOUTS
P OPOSED 1250
GALLON SEPTIC TANK
INSTALL
FOUNDATION
CLEANOUT
ROPOSED
WELL
1 _ CULVERT
ALASKA WATER & WASTEWATER
CONSULTANTS, INC.
6901 DE8ARR ROAD. SUITE 28 • ANCHORAGE. AN 99504 • PHONE (907)337-6179 • FAX (907)338.32(.6
LEGAL DESCRIPTION:
DENALI HEIGHTS SUBDIVISION; LOT 5,
TYPE OF WORK:
DESIGN FOR PROPOSED WELL LOCATION AND SEPTIC SYSTEM
V7* 00
VA
ness.•
`00 x0
0 eSSIO",•6
OO000�
r.
ALASKA WATER & WASTEWATER
CONSULTANTS. INC.....
3701 E TUDOR ROAD. SHNIE 101 • ANCHORAGE. AN 99507 • PHONE: (907)337-0179 • FAX: (907)335-3246 • WEBSITE: okwa.aom
SOIL LOG — PERCOLATION TEST
LEGAL DESCRIPTION: DENALI HEIGHTS SUBDIVISION: LOT 5,
PERFORMED FOR: MARK ROBINSON
DEPT
(feet
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SOILS LOGGED BY:
COMMENTS. *RECOMMEND USING A 0.6 APPLICATION RATE.
•,,
L
13.0.11.
GM/SM
TEST HOLE #1
SOIL CLASSIFICATIONS
GW
GP
GM
GC
SW
SP
SM
SC
DATE 5/16/2003
ORG
ML
CL
OL
MH
CH
OH
DEPTH TO
GROUNDWATER
DATE
DRY
5/16/2003
DRY
5/23/2003
0
0
Dp
0
l L/
Q
v •, of a A. mess.
Qd4'.vs .. •� —7953 ,.. eo1
p dE'rofesst°1°ao
�DOo��pOo
DATE
READING
CUTBANK
4\
,4:
TMi1
7112
SITE PLAN
11.100'
DATE
READING
CLOCK
TIME
NET TIME
(MINUTES)
WATER LEVEL
READING
NET DROP
(INCHES)
5/20/2003
1
2:44
—
6"
—
2
2:54
10
3"
3"
3
2:54
—
6"
—
4
3:04
10
3 1/4"
2 3/4"
5
3:04
—
6"
—
6
3:14
10
4"
2"
7
3:14
—
6"
—
8
3:24
10
4"
2"
9
3:24
—
6"
—
10
3:34
10
4"
2-
11
3:34
—
6"
—
12
3:44
10
4"
2"
PERCOLATION RATE
5 (MIN./INCH)
PERC. HOLE DIA. 6 (INCHES)
TEST RUN BETWEEN 5.5 FT. AND 6.0 FT.
A FOUR HOUR PRESOAK WAS PERFORMED: YES ❑ NO
KELLY HEITSTUMAN PERCOLATION TEST PERFORMED BY: CALEB GALL
PERFORMED BY AKWWC, INC. I, JEFFREY A. GARNESS, CERTIFY THAT THIS W/1S PERFORMED IN ACCORDANCE
WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE: S
5,
ALASKA WATER & WASTEWATER
CONSULTANTS, INC.
3701 E. 1UDOR ROTO. SURE 101 • ANGIORAOE, M 09607 • PHONE (90 )337-6179 • FM: (907)336-32443 • WEBSRE: olorre.eom
SOIL LOG - PERCOLATION TEST
LEGAL DESCRIPTION: DENALI HEIGHTS SUBDIVISION; LOT 5,
PERFORMED FOR: MARK ROBINSON
(feet
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SOILS LOGGED BY:
COMMENTS- •RECOMMEND USING A 0.6 APPLICATION RATE.
B.O.H.
GM/SM
TEST HOLE #2
SOIL CLASSIFICATIONS
o•o'o'
eee
GW
GP
GM
GC
SW
SP
SM
SC
DATE: 5/16/2003
ORG
ML
CL
OL
MH
CH
OH
DEPTH TO
GROUNDWATER
DATE
DRY
5/16/2003
DRY
5/23/2003
-v.O1)D
vA
A. T rness: 1
-7953 .• .
�Odo�ofess101 c§:7
044400"
DATE
READING
CUT&WK
NET TIME
(MINUTES)
TM! 1
THl12
SITE PLAN
1"=100,
DATE
READING
CLOCK
TIME
NET TIME
(MINUTES)
WATER LEVEL
READING
NET DROP
(INCHES)
5/20/2003
1
2:43
—
6"
—
2
3:13
30
5"
1"
3
3:13
—
6"
—
4
3:43
30
5"
1"
5
3:43
—
6"
—
6
4:13
30
5"
1"
PERCOLATION RATE 30 (MIN./INCH)
PERC. HOLE DIA. 6 (INCHES)
TEST RUN BETWEEN 5.5 FT. AND 6.0 FT.
A FOUR HOUR PRESOAK WAS PERFORMED: • YES ❑ NO
KELLY HEITSTUMAN PERCOLATION TEST PERFORMED BY: CALEB GALL
PERFORMED BY AKWWC, INC. I, JEFFREY A. GARNESS, CERTIFY THAT THIS W P FORMED IN ACCORDANCE
WITH ALL STATE AND MUNICIPAL GUIDEUNES IN EFFECT ON THIS DATE: 571-7/
AKWWC, Inc., Year 2003
ALASKA 'WATER & WASTEWATER
CONSULTANTS, 1NC.
Standard Construction Specifications for Single Family Wells &
Onsite Wastewater Disposal Systems
I. REFERENCE PROPERTY:
Lot 5, Denali Heights Subdivision. The design is for a three (3) bedroom residence
II. DEFINITIONS:
1. Property owner or homeowner: The legal property owner or his/her appointed representative
(not AKWWC, Inc.).
2. Engineer: Alaska Water & Wastewater Consultants, Inc. (AKWWC, Inc.)
3. Contractor: The company hired by the property owner to install the septic system. If the property
owner installs the system then he/she would also be the contractor for purposes of this installation.
4. Well Driller: The person or company hired by the property owner to drill the well.
5. DSD &/or MOA: Municipality of Anchorage, Development Services Department, On -Site Water
& Wastewater Program.
III. RESPONSIBILITIES:
• Property Owner Responsibilities:
1. CONTRACTUAL RELATIONSHIP: The property owner shall contract with the contractor to
perforin the work outlined in these specifications and plans, in accordance with the attached DSD permit.
There is no contractual relationship between the contractor and the engineer. The engineer shall inspect
the work, as required by DSD, so as to document the installation. Final acceptance of the contractor's work
rests with the owner and the DSD.
2. SINGLE FAMILY RESIDENCE ONLY: This well and/or septic system design is for a single
family residence only. The homeowner is responsible for notifying the engineer if the residence is used as
a duplex, business, or multi -family dwelling. In such cases, the installation permit must be obtained from
the State of Alaska, Department of Environmental Conservation.
3. DISCLAIMER REGARDING AS -BUILT SURVEY: The validity of the design site plan is
limited by the accuracy of the as -built survey provided to the engineer by the property owner or his/her
representative. The property owner shall notify the engineer regarding any known inaccuracies associated
with the as -built survey. The engineer assumes no responsibility for the accuracy of the survey.
4. UNPLATTED EASEMENTS: The property owner is responsible for notifying the engineer
and the contractor of any unplatted easements, not shown on the as -built survey, which the new well or
septic system may encroach into. Such easements are typically identified in the property title report.
5. DISCLOSURE OF SITE CONDITIONS: The property owner shall notify the engineer and the
contractor of any seasonal groundwater or surface water runoff conditions known to him/her which could
potentially effect the operation of the septic system. The proposed septic system must be at least 100 feet
from any streams, ponds, creeks, swamps, bogs, or any other surface water as defined by the DSD. This
disclosure is of particular significance when the site evaluation and design work is being done during the
winter months when surface waters are frozen and there is snow cover.
Page 1 of 7
•
AKIVWC, Inc., Year 2003
The property owner shall notify the engineer and the contractor of any known subsurface conditions that
would prohibit or restrict the installation of the septic system. Items of concem would include, but are not
limited to buried piles of construction debris, undocumented septic systems, areas which consist primarily
of fill (imported) soil, subsurface drainage systems, & abandoned wells.
6. DRINKING WATER WELLS: The property owner is responsible for notifying the engineer
if, to his/her knowledge, any of the adjacent properties are used as a duplex, business, or multifamily
dwelling. The new septic tank and leachfield must be at least 100 feet from any private well, 150 feet from
any class "C" well, and 200 feet from any class "A" or "13" well, unless appropriate waivers are obtained.
Furthermore, the property owner shall notify the engineer of any undocumented or abandoned wells,
known to him or her, that are located on the subject or adjacent properties.
7. CURTAIN DRAINS: The new drainfield must be at least 20 feet down gradient and 50 feet
upgradient from any subsurface drains. This includes foundation drains. The property owner should notify
the engineer of any such drains that are not shown on the design drawings for this installation.
8. POST CONSTRUCTION SITE RESTORATION: Unless specifically agreed upon otherwise,
the property owner is responsible for final grading of the areas which settle after construction. Prior to
awarding the contract, the homeowner should communicate to the contractor any expectations regarding,
tut not limited to post construction site clean-up, re -landscaping, and restoration of any asphalt, fences,
trees, decks, ect. that are effected by the construction. All mound type drainfields are required by the MOA
to be re -vegetated. The property owner is responsible for this work unless other arrangements are made
with the contractor.
If the property is being sold, the property owner shall ensure that the aforementioned items are addressed
with the buyer, and, if the work is to be completed after the sale of the property, that necessary funds are
escrowed to fund the completion of the work.
9. PROPERTY OWNER INSTALLATION OF SEPTIC SYSTEM: If the property owner intends
to install the septic system he/she must first have obtained approval from the Municipality of Anchorage,
DSD (343-7904). Homeowner installations typically require more time for engineer inspections. The
homeowner should discuss the additional costs associated with such inspections with the engineer prior to
starting the project.
10. ENGINEER CHARGES TO INSPECT THE INSTALLATION: The property owner is
responsible for payment of all the engineer inspection charges. These charges are in addition to the soils
testing and design work that was required to obtain the MOA sewer/well permit. The number of
inspections will vary depending on the actual field conditions encountered and the construction methods
used. If there are any questions by the property owner, or his/her representative, regarding charges for
installation inspections they should be discussed prior to beginning construction. AKWWC, Inc. will
provide you with a written copy of the fee schedule.
11. CHANGES IN THE SCOPE OF WORK: See Section V, "Disclaimers" regarding design
changes. See "Contractor Responsibilities", paragraphs 1, 2, & 13. In addition, see "Engineer
Responsibilities", paragraphs 2, 4, & 5.
• Contractor Responsibilities:
1. PRE -CONSTRUCTION LAYOUT: The contractor is responsible for locating all buried
utilities, easements, property lines, surface water setbacks, well radii, and water service lines which may be
encroached upon by the proposed septic system. The contractor shall ensure that all setbacks are flagged
by a registered land surveyor, or other appropriate means, prior to construction. AKWWC, Inc. field
engineers/inspectors will not be responsible for establishing or confirming any of the aforementioned
setbacks.
The contractor should recognize that the location of all wells, surface waters, structures, and other items
shown on the design drawings are typically derived from as -built surveys, and municipal records. The as -
built surveys and municipal records (prepared by professional engineers & land surveyors) have been
assumed to be accurate for purposes of this design; however, the accuracy has not necessarily been field
verified. Prior to beginning any construction the contractor shall field locate all items which have
protective setbacks and verify that there are no encroachment concerns. Any encroachments, for which
Page2of7
•
•
AKIVIVC, Inc., Year 2003
(waivers have not been granted, should immediately be brought to the attention of the property owner (or
their representative) and the engineer.
The test hole pipes shall pot be removed/abandoned until after the engineer has established their location
relative the new drainfield during the first inspection of the drainfield installation or during the pre -
construction layout. The new drainfield/s must be within a 30 foot radius of the test hole/s used for
establishing the design criteria.
The contractor should establish the elevation of all existing and proposed system components prior to
starting construction so as to insure that the necessary grades can be maintained. This is particularly
significant when the elevation of the existing system components is unknown because clean -outs are not
present, buried, or non-functional (can't measure down them because of obstructions). It is recognized that
conditions can be discovered that will materially change the design and the construction costs.
2. DISCREPANCIES BETWEEN DESIGN DRAWINGS AND SPECIFICATIONS:
Construction shall be in accordance with the approved site plan and design drawings, and any special
provisions noted on the municipal sewer permit. The contractor is responsible for notifying the engineer of
any discrepancies noted on the design plans or drawings, prior to starting work.
3. CHECK GROUNDWATER LEVELS IN TEST HOLE MONITORING TUBES: Prior to
beginning construction, the contractor shall check the liquid level in the test hole monitoring tubes to
ensure that there has been no change in the groundwater levels that would impact the proposed design.
Any rise in the liquid level should be brought to the attention of the engineer so that design changes can be
made if necessary.
4. MAXIMUM DEPTH OF DRAINFIELDS: The maximum depth of the drainfield is shown on
the design drawings or is noted in the narrative portion of the design package. The contractor shall notify
the engineer of any inconsistencies noted in the design package.
For purposes of this installation, the maximum depth of the drainfield will be based upon taking a
measurement at the deepest part of the excavation between the highest ground elevation encountered
(usually on the uphill side of the excavation) and the bottom of the trench or bed excavation. The
contractor shall exercise caution not to remove evidence of the original grade prior to establishment of the
total system depth. In short, don't remove the organic layer until after the original grade elevations are
established by the inspecting engineer.
5. SUITABILITY OF MATERIALS USED FOR CONSTRUCTION. The contractor shall
ensure that all materials being used are in compliance with the most current guidelines established by the
Municipality of Anchorage. This includes, but is not limited to, the following:
a. Drainrock
b. Sand filter material for conventional beds, trenches, or mound systems.
c. Sand filter material and pea gravel for Intermittent Sand Filters (ISF).
d. Anchorage Sand and Gravel (AS&G) "block pea" material for Upflow Filters.
It is recommended that the contractor provide the engineer with current sieve analysis' from the sand/gravel
supplier to document the suitability of the material. The engineer assumes no responsibility for ensuring
that the materials delivered meet the MOA requirements.
6. BURIAL RATING OF TANKS: The contractor shall ensure that the septic tank, lift station, or
holding tank purchased has a burial depth rating suitable for the actual installation.
7. SEPTIC TANK AND STEP TANK SIZES: Prior to purchasing a septic tank or lift station the
contractor shall verify that it is adequately sized for the number of bedrooms shown on the permit issued by
MOA. The minimum septic tank size is 1000 gallons and the minimum STEP tank size is 1250 gallons.
These size tanks will handle residences with up to 3 bedrooms. For each additional bedroom over three (3)
the septic tank or the STEP tank volume shall be increased by a minimum of 250 gallons. For example, a
four (4) bedroom residence must have a 1250 gallon septic tank or a 1500 gallon STEP tank.
8. INSPECTIONS - ENGINEER NOTIFICATION: The contractor shall notify the engineer at
least 24 hours prior to starting construction. If deemed necessary, a pre -construction site visit shall take
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AKWWC, Inc., Year 2003
place. The contractor shall coordinate with the engineer any inspections which will be required during
weekends, holidays, or before/after normal working hours (8:00 am to 5:00 PM). The property owner may
incur additional charges for inspections which do not occur during normal business hours. It is the
contractor's responsibility to notify the engineer a least 2 hours prior to any inspection.
9. REGULATORY NON-COMPLIANCE. The contractor shall report to the engineer and the
property owner any observed condition which would put the septic system in violation of State or
Municipal regulations.
10. BACKFILL OLD TEST HOLES: Any remaining test hole excavations shall be filled and
mounded as part of this project. Unless instructed otherwise by the engineer, the old test hole groundwater
monitoring pipes shall be removed.
11. FINAL GRADING FOR DRAINAGE: The contractor is responsible for final grading so as
to ensure that surface runoff does not adversely effect the septic system constructed, adjacent septic
systems, or adjacent structures.
12. SOIL COVER REQUIREMENTS: The contractor shall ensure that the final cover over the
tank and drainfield is either compacted adequately when backfilling, or mounded sufficiently to ensure that
there is adequate soil cover over the tank and drainfield after settlement occurs. If seasonal conditions
prevent this, the property owner (or his representative) shall be notified that additional fill may be required
after settlement occurs. This notification is of extra significance when the property is changing ownership.
13. CHANGES IN CONSTRUCTION COSTS: The contractor is responsible for obtaining
approval from the property owner for any additional construction costs associated with design
modifications or changing field conditions prior to doing the work.
14. WORKING IN RIGHT-OF-WAYS AND TRESPASSING PRIVATE PROPERTY: The
contractor is responsible for coordinating (including payment of encroachment permit fees) all access
through public and private properties with the appropriate authorities and/or property owners. Furthermore,
the contractor shall inform all parties of any potential impacts to adjacent properties prior to beginning any
construction.
15. MAINTENANCE & OPERATIONS MANUALS: The contractor shall provide the
homeowner with the manufacturer's installation/maintenance manuals for all system components installed
under this contract. If not given directly to the property owner, the manuals should be enclosed in a
protective cover (plastic bag) and placed/secured in a prominent location so the property owner can find it.
16. INNOVATIVE SEPTIC SYSTEMS. START-UP INSPECTIONS: The contractor shall
notify Anchorage Tank & Welding Company (272-3543) after the installation of an Intermittent Sand Filter
kit or Advantex system (supplied by Anchorage Tank) is installed so that the appropriate start-up inspection
can be scheduled. This notification also activates the quarterly maintenance schedule. Such notification is
usually not required for BioCycle installations since `BioCycle of Alaska" is typically involved with the
installation. The contractor shall contact BioCycle of Alaska (283-9003) regarding any start-up notification
requirements.
• Well Driller Responsibilities:
1. The well driller shall ensure that he has a well permit in possession prior to drilling the well.
2. The well driller shall physically verify that the there are no septic systems, or other potential
sources of contamination, within the protective radius of the proposed well prior to drilling it.
• Engineer Responsibilities:
1. SYSTEM DOCUMENTATION: The engineer is responsible for inspecting the installation of
the septic system and preparing as -built documentation, to the satisfaction of the M.O.A.. Inspections are
performed as necessary to document the construction of the system to the satisfaction of the M.O.A. In all
cases, inspections shall be performed as necessary to establish the following:
* The original grades at the drainfield/s site
* The bottom of all trench/bed excavation
* Top of sand on all sand filters
* Top of drainpipe
* Septic tank, or lift station, or holding tank prior to backfill
* Placement of filter fabric and insulation
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AKNII'C, Inc., Year 2003
• After final grading is completed
2. LIMITED AUTHORITY: The inspecting engineer has no direct authority over the contractors
activities or construction/safety practices. Should the engineer identify conditions which dictate a design
change, he or she will recommend that work be stopped, and/or the design be modified. If design
modifications are necessary, the engineer shall notify the property owner or his/her representative. The
inspecting engineer does not have the authority to direct the contractor to modify the system design in such
a way that it would be in violation of State or MOA regulations.
3. SEPTIC TANK INTEGRITY: The engineer shall inspect the condition of the existing septic
tank and determining its suitability for re -use. If the engineer determines the septic tank to be structurally
unsound, it must be replaced.
4. COORDINATION OF DESIGN CHANGES WITH THE MOA: If design changes are
necessary, the engineer will coordinate the approval of the changes with the MOA. The contractor does not
have the authority to proceed with any design modifications until verbal or written approval is obtained
from the MOA.
S. COORDINATION OF WAIVERS: If, during construction, it is determined that a waiver will
be required in order to install the system as designed, the engineer will apply for the necessary waiver/s to
the appropriate State or MOA regulatory bodies. The engineering services and State/MOA fees associated
with such waivers will be additional charges to the property owner, over and above the installation
inspection fees charged by AKWWC, Inc.
SECTION IV. CONSTRUCTION GUIDELINES:
Construction shall be in accordance with the approved site plan and design drawings and any special
provisions noted on the municipal well and/or sewer permit. All materials, components, workmanship, and
construction practices shall comply with the Municipality of Anchorage's latest ordinances regarding wells
and septic systems, as well as DSD policies. The failure of the inspecting engineer to notice a material or
construction non-compliance does not relieve the contractor of his/her responsibility to correct such a
deficiency.
• Septic Tank, Holding Tank, or Lift Station Installation:
1. The burial rating of the tank shall be adequate for the actual burial depth encountered.
2. The tank shall be level and sufficiently bedded to prevent settling or shifting of the tank.
3. All standpipes on the tank shall extend a minimum of 12 inches above final grade.
4. Tanks installed with less than 4 feet of cover shall be insulated. See "Contractor Responsibilities",
paragraph 12 regarding final soil cover.
5. The sewer service line from the house to the tank shall be sloped a minimum of 1/4"
per foot, unless prior approval is obtained from the engineer.
6. The inlet and outlet lines from the tank shall be bedded in drainrock or the soil shall be adequately
compacted to prevent future settlement of the soil.
7. A foundation clean-out will be installed (1-4 feet from the house) if one does not currently exist.
8. Post tank clean -outs shall be installed per MOA requirements. Does not apply to holding tanks or lift
stations with pressurized lines.
9. In high groundwater areas, all tanks shall be anchored to resist buoyancy forces when there is not
adequate soil cover to resist the uplift force. The engineer shall make this determination.
10. The final soil cover shall be graded so that there is positive drainage away from tank.
11. All holding tanks and lift stations shall have an audible and visible alarm inside the residence.
12. All lift stations shall be wired in compliance with all MOA guidelines and the Uniform Electrical
Code. A municipal electrical permit and inspections must be obtained in areas where required by
the Municipality of Anchorage.
13. The contractor shall remove the old tank, or abandon it in compliance with the Uniform Plumbing
Code (UPC). The contractor is solely responsible for the abandonment procedure.
14. ISF AND ADVANTEX INSTALLATIONS: The control panel for the Intermittent Sand Filter and
Advantex systems shall be located outside the residence, for easy access during inspections. A
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AKWWC, Inc., Year2003
remote alarm must be installed inside the residence as per DSD requirements. Mounting the
panel directly to an exterior wood wall should be avoided because the closing of the relays creates
a "clanking" noise that may be offensive to the property owners.
15. ISF INSTALLATIONS: The air compressor shall be equipped with 0 to 10 psi gauge for the purpose
of monitoring air flow to the sand filter. The pressure gauge will be located so that it is easily
monitored by the property owner.
• Installation of Conventional Absorption Bed & Trenches:
1. Excavate the proposed bed/trench to the dimensions shown on the design. The bottom of the excavation
shall be within 2 inches of level (2 inch maximum variation between high and low spots). If the sidewalls
or bottom of the excavation become smeared, they must be raked or scarified before placement of the filter
sand or drainrock.
2. The trench or bed should be at least 5 feet from the test hole excavation.
3. All soil tests and excavation depths are advisory to the design and are to be verified in the field by the
engineer. If design changes are necessary, and the changes effect the contractor charges to the property
owner, the contractor shall obtain approval from the property owner prior to proceeding with the work.
4. Once the drainrock is installed, the distribution pipe is to be placed level (0.02 feet difference between
high and low shots) with the perforations faced downward. Drainrock is then to be placed over the
distribution pipe, to provide a minimum of 2 inches of cover over the pipe. The drainrock shall not be
pyramided over the drainpipe but shall be the same elevation over the entire trench/bed width.
5. A silt barrier must be installed between the final drainrock layer and the native soil backfill. The silt
barrier shall cover the entire drainrock surface.
6. Monitor tubes shall be installed at the locations shown on the design drawings, and extend a minimum
of 12 inches above final grade. The portion of the monitoring tube extending through the drainrock shall be
perforated from the bottom of the trench/bed to the invert of the distribution pipe.
7. Backfill over the final drainrock layer must not be less than 2 feet. Insulation must be installed when the
backfill depth is less than 3 feet. The insulation shall cover the entire width of the trench/bed. the
contractor shall "shoot" the final grades to ensure cover depth is adequate, prior to notifying the engineer
that the work is complete. The final cover over the drainfield must graded so that there is no potential for
water to pond over the trench/drainfield. See "Contractor Responsibilities", paragraph 12 regarding final
soil cover.
8. If an alternator valve was installed with this design the contractor shall provide a functional valve key to
the property owner.
SECTION V. DISCLAIMERS
• UNFORESEEABLE SITE CONDITIONS: The design of this septic system, prepared by AKWWC,
Inc., was based upon a limited evaluation of the soil, groundwater, and site conditions. The extent of
the evaluation is consistent with standard engineering practice in the field. Furthermore, this design
was evaluated and approved by the engineers or technicians on staff at the Municipality of Anchorage,
DSD, based upon the information provided to them. Occasionally, during construction, unforeseeable
subsurface conditions (high groundwater, poor soils, buried debris, ) are encountered that make the
proposed installation not feasible. In such cases it is typically necessary to do more soils testing,
groundwater monitoring, and design work. These additional engineering services will be performed on
a fee basis at an hourly rate. AKWWC, Inc. will obtain verbal authorization from the property owner
(or his/her representative) prior to proceeding with the work, and will provide a written estimate if
requested. The property owner should discuss with the contractor any changes in the installation cost
associated with the design changes.
• IF THE PROPERTY BEING SOLD AND FUNDS ESCROWED FOR THE UPGRADE, it is
important to bear in mind that the ability to upgrade the septic system on this property is not 100%
certain (for the reasons stated in the previous paragraph). There is always the possibility that
conditions could be encountered that would prevent the installation of anything other than a holding
tank. Although such a situation would be rare, it is important that all parties recognize that such a
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AKIYIVC, Inc., Year 2003
scenario is possible.
• SEPTIC SYSTEM PERFORMANCE: The design of this septic system is based upon limited soils
testing, groundwater monitoring, and a visual assessment. It is possible that the actual soil conditions
are less favorable then the testing data indicated and that adverse, unforeseeable, changes in the
surface/subsurface water conditions could impact the performance of the system. Numerous other
factors, out of the control AKWWC, Inc., may adversely effect the long term performance of the
system. Such factors include, but are not limited to, excessive number of residents in the house,
plumbing leaks, the use of septic system additives, failure to pump septic tank regularly, failure to
alternate drainfields (when this is an option), or/and excessive use of water. Given these variables, it is
not possible to warrantee the performance of a septic system.
By proceeding forward with this installation, the Engineer, Well Driller, Contractor, and Property
Owner agree that they have read these specifications and agree to accept the terms and conditions
outlined In them.
NOTE: Additional charges for inspections will apply.
A final invoice will be issued once all work is complete for
inspections and documentation as required by the M.O.A.
Please refer to the following estimated inspection costs:
1. Conventional septic system with a single trench/bed, no sand filter: $600.00
2. Conventional septic system with a single trench/bed, sand filter: $675.00
3. Conventional septic system, dual trenches, no sand filter: $775.00
4. Conventional septic system, dual trenches, sand filters: $950.00
5. Alternative Technology septic systems: $1000.00
6. Lined Intermittent Sand Filter with secondary drainfield : $1500.00
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