HomeMy WebLinkAboutHANSEN SAND LAKE LT 14GARNESS ENGINEERING GROUP, Ltd
CIVIL & ENVIRONMENTAL ENGINEERS ~-~
April 17, 2015
Municipality of Anchorage
Development Service Department
On-Site Water & Wastewater Program
4700 Elmore Road
Anchorage, AK 99507
Reft Proposed Private Well & Septic System for Hansen Sandlake S/D; Lot 14
To whom it may concern:
The referenced property is currently vacant. The owner is proposing to construct a 1 bedroom residence
with a shop on the property. The structure is proposed to be served by a private well and septic system
(there is no public utilities stubbed to the property). We are proposing to install a deep trench type
drainfield and a 1000 gallon septic tank. To allow for future expansion, the septic system will be sized
for three bedrooms (oversized). Two test holes were excavated on the property. The drainfield will be
designed around the 30 foot radius of this test hole#2. Comments regarding the design are summarized
as follows:
1. SOILS: See the attached 2015 logs which shows the soil classifications, groundwater monitoring,
and the percolation test results. We are proposing to use the native soil as a sand filter (see attached
analysis by DOWL HKM). This insitu soil layer will serve as a filter for the downward migrating
effluent.
2. DRAINFIELD DESIGN: See attached design drawing for drainfield specifications.
3. SURFACE WATERS: There are no surface water concerns.
4. TOPOGRAPHY: The average topography in the area of the proposed drainfields is relatively flat.
In short, there are no slope concerns.
,Ifyou half~ any questions, please contact us at 337-6179.
PresidTty ~
We are unaware of any adverse impacts this installation would have on adjacent wells or septic
Thank you for your assistance.
3701 East Tudor Road, Suite 101 * Anchorage, Alaska 99507-1259
Phone: (907) 337-6179 "Fax: (907) 338-3246 '* Website: www,garnessengineering,com
1" = 100'
N SAND[AK
PUBUC/PUBuc I
WATER / WATER
IEANDLAKE SAND[AKE
S/B; S/D;
LOT 7D LOT 7C
PUBLICWATER
&
SEWER
HANSEN
SANBLAKE
LOT 7 E2
PUBLIC WATER
ONLY
PUBLIC
s/O; s/e: S/C;
LOT 14
HUCKLEBERRY
HTS; BLOCK
LOT 4
PUBLIC WATER
HUCKLEBERRY
HTS; BLOCK 1
LOT 3
i
PUBUC WATERI
HUCKLEBERRY
HTS; BLOCK
LOT 2
PUBLIC WATEI:~
&c SEWER
: SEWER
HUCKLEBERRY
HTS; BLOCK 1,
LOT 17
PUBLIC WATER
HTS; BLOCK 1,
PUBLIC WATER
& EWER
HTS; BLOCK 1,
PUBEC WATER
& SEWER
/
/
t50' WELL
HANSEN ~ND~KE S/D; LOT 17
/
/
/
/
S/0; LOT
S/D; LOT
HANSE~
]'" -...AREA-)
/
/
/
/
HANSEN SAND[AK
S/D; LOT 16B
HANSEN SANO[AKE
S/D; LOT 16C
GARNESS ENGINEERING GROUP, Ltd
SITE PLAN /1 5
NUMBER OF BEDROOMS: 1 (SIZED FOR 3)
GALLONS PER DAY (GPD): 450 GPD
PERCOLATION RATE/S: .~1 MIN/INCH
PROPOSED APPLICATION RATE: 1.0
MINIMUM DRAINFIELD SQ.FT.: 4-50
FIELD )ESIGN:
MAXIMUM DEPTH: 10 FEET
WIDTH: 2.5 FEET
LENGTH: 45 FEET
M.O.A. APPROVED SAND FILTER: VARIANCE
EFFECTIVE: 5 FEET REQUESTED
REDI[~CTION FACTOR: N/A
SQ.ET.: 450 FEET~
LETTER THAT PERTAINS TO THIS DESIGN.
TO OBTAIN A COPY OF THE LETTER
CONTACT GEG. BY PROCEEDING FORWARD
WITH THIS iNSTALLATION, THE ENGINEER,
WELL DRILLER, CONTRACTOR AND
PROPERTf OWNER AGREE THAT THEY
HAVE READ THESE SPECIFICATIONS AND
AGREE TO ACCEPT THE TERMS AND
CONDITIONS OUTLINED.
NOTE: THE CONTRACTOR SHALL
HAVE THE SOUTH & EAST LOT
LINES, AND ALL WELL RADII
EXISTING &: PROPOSED) FLAGGED
A REGISTERED LAND SURVEYOR
PRIOR TO CONSTRUCTION,
1" = 40'
RESERVE SITE~
PROPOSED DRAINF;IELD INSTALL DDL C
---1
GARNESS ENGINEERING GROUP, Ltd
DIVIL & ENVIRONMENTAL ENGINEERS
PREPARED FOR: ~PHONE NUMBER: PAGE NUMBER:
ELLIOTT MAELOW I 229-8028 2 OF 2
LEGAL DESCRIPTION:
HANSEN SANDLAKE S/D; LOT 14
~PE OF WORK:
TESTHOLES
DRAWN BY:
PNB
DATE:
"15
GARNESS ENGINEERING GROUP, Ltd
~-~ CIVIL & ENVIRONMENTAL ENGINEERS
ISOIL LOG - PERCOI-~TION TEST I
LEGAL DESCRIPTION: HANSEN SANDLAKE S/D; LOT 14
PERFORMED FOR: ELLIOTT MARLOW
DATE: 4/10/15
¢ A. Gamess
ORGANICS
ITEST HOLE #1 I
LOAM (S~
SP
SOILS LOGGED BY: JODYMAUS
COMMENTS:
SOIL CLASSIFICATIONS
ORG
NL
CL
OL
NH
CH
OH
SC
DEPTH TO
GROUNDWATER DATE
DRY 4110115
DRY 4/17/15
SITE PLAN
SCALE:
DATE READING CLOCK NET TIHE WATER LEVEL NET DROP
TINE (HINUTES) READING (INCHES)
4/10/15
ABSORBED 5 GALLONS
OF WATER IN LESS
THAN 4 MINUTES
PERCOLATION RATE <1 (MIN./INCH) PERC. HOLE DIA.
TEST RUN BETWEEN 5.5 FT, AND 6.5 FT.
A FOUR HOUR PRESOAK WAS PERFORMED: [--]YES I NO
PERCOLATION TEST PERFORMED BY: JODY MAUS
PERCOLATION READINGS ARE WITHINI/16OFINCH,
6 (~NCHES)
PERFORMED BY GEG, Ltd. I, JEFFREY A. GARNESS, CERTIFY THAT THIS WAS PERFORMED IN .~CC~..ORDANCE
WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE: ~ ./~O'/! ~
GARNESS ENGINEERING GROUP, Ltd
CIVIL & ENVIRONMENTAL ENGINEER.~
[SOIL LOG - PERCOLATION TEST I
LEGAL DESCRIPTION: HANSEN SANDLAKE S/D; LOT 14
PERFORMED FOR: ELLIOTT MARLOW
DATE: 4/10/15
ORGANICS
ITEST HOLE #2 I
SOIL CLASSIFICATIONS
LOAM (SM)
SP
ORG
ML
CL
OL
MH
CH
OH
SC
DEPTH TO
GROUNDWATER DATE
DRY 4/10/15
DRY 4/17/15
SITE PLAN
SCALE:
VISUALLY INSPECTED
TO 17 FEET
MONITORING TUBE
SETAT 15 FEET DUE
TO SLOUGHING
SOILS LOGGED BY: JODYMAUS
COMMENTS:
DATE
4/10/15
CLOCK
TIME
READING
NET DROP
(INCHES)
NET TIME
(MINUTES)
ABSORBED 5 GALLONS
OF WATER IN LESS
THAN 4 5 MINUTE,~
WATER LEVEl
READING
PERCOLATION RATE <1 (MIN./INCH) PERC, HOLE DIA.
TEST RUN BETWEEN 5.5 FT. AND 6,5 FT.
A FOUR HOUR PRESOAK WAS PERFORHED: [] YES · NO
PERCOLATION TEST PERFORMED BY: JODY MAUS
PERCOLATION READINGS ARE WITHIN 1/16 OF INCH.
(INCHES
PERFORMED BY GEG, Ltd. I, JEFFREY A. GARNESS, CERTIFY THAT THIS WAS PERFORMED IN ACCORDANCE
WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE: ~ [~. ~/[__~
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