HomeMy WebLinkAboutSWG2026-00072 - SWG Application / Design - 3/13/2026 MASON COUNTY 415 N 6TH STREET,SHELTON, ,WA 98584
• SHELTON:360-427-9670,EXT 400
BELFAIR:360-275-4467,EXT 400
Public Health & Human Services ELMA:360-482-5269,EXT 400
FAX:360-427-7787
On-Site Sewage System Permit: SWG2026-00072
APPLICANT Hunter, Adam Phone: 360 753-1226
Address: 2201 93rd Ave SW Olympia, WA 98512
OWNER BARNHART AMANDA CHRISTINE& Phone: 360-701-3279
ROBERT MATTHEW
Address: 141 SE COOK PLANT FARM RD SHELTON, WA 98584
Site Address: 141 SE COOK PLANT FARM RD
Primary Parcel Number: 320333400140
Permit Description: PROPOSED SEPTIC FOR NEW ADU
Permit Submitted Date: 03/13/2026
Permit Issued Date: 04/07/2026
Issued By: Jeff Wilmoth
Current Permit Fees Paid: $570.00 (additional fees may be required upon installation of system).
Permit Expiration Date: 03/19/2029 (based on date of inspection)
Permit Conditions:
I Approval of this septic permit does not approve the building location. Building location is
subject to approval from all applicable departments and regulations.
2 Proposed development subject to zoning requirements and approval by the planning
department staff per Mason County Title 17.
3 Permit must be installed by a Mason County Certified Installer unless prior written
authorization from Mason County is obtained.
4 Drain field installation not to exceed designed upslope and downslope depth specified on
design form.
5 Installer is responsible for obtaining Mason County installation approval prior to backfill of
system components.
6 Installer is responsible for obtaining Septic Designer/Engineer installation approval prior to
backfill of system components.
7 Mason County Asbuilt Form, Record Drawing, and Installation fee must be submitted for
final installation approval.
THIS PERMIT MUST BE ONSITE DURING INSTALLATION OF OSS.
PROPERTY OWNERS ARE RESPONSIBLE FOR DETERMINING AND MARKING ALL PROPERTY LINE AND EASEMENT LOCATIONS.
THIS PERMIT MAY BE REVOKED IF THE SITE CONDITIONS HAVE CHANGED SINCE THE SITE WAS INSPECTED AND DESIGN APPROVED.
FINAL INSTALLATION APPROVAL IS REQUIRED PRIOR TO TEMPORARY OR FINAL OCCUPANCY OF ANY RELATED STRUCTURES.
For Final Inspection visit: masoncountywa.gov/health/environmental/onsite/oss-inspection-request.php or call:
360-427-9670, extension 400.
1 �
OFFICIAL USE ONLY
MASON COUNTY DATERECENED: 3f
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AMOUNTRE ED: RECEIVED BY:
J
Public Health & Human Services
Environmental Health 360-427-9670,ext.400 or 360-275-4467,ext.400 /� IA
415 N.6th Street-Shelton,WA 98584 S W G / O �� O
ON-SITE SEWAGE SYSTEM APPLICATION
APPLICANT PHONE fn m
Matt Barnhart 13607013279 z
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MAILING ADDRESS-STREET,CITY,STATE,ZIP CODE 9
141 Cook Plant Farm Rd SE CC Shelton WA 98584 rn
SITE ADDRESS-STREET,CITY ZIP CODE /flcz7t
141 Cook Plant Farm Rd SE Shelton 98584 I
ca o
NAME OF DESIGNER PHONE
ADAM HUNTER 3607531226 I o
NAME OF INSTALLER PHONE O I
PERMIT TYPE(select one) DRINKING WATER SOURCE
RESIDENTIALOSS L����COMMUNITY OSS ❑.COMMERCIAL OSS ❑ PRIVATE INDIVIDUAL WELL ❑ PRIVATE TWO-PARTY WELL Z
TYPE OF WORK(select one) ❑ PUBLIC WATER SYSTEM
❑✓ NEW CONSTRUCTION/UPGRADES ❑REPAIR/REPLACEMENT OTHER DETAILS(select all that apply) ❑ TABLE X REPAIR
SUBMITTALS ❑ SURFACING SEWAGE ❑ EXISTING FAILURE O SHORELINE I3
EJ DESIGN FORM(REQUIRED) Q SEPTIC DESIGN(REQUIRED) BEDROOMS LOT SIZE WAS LOT CREATED AFTER 4/1/2025? r
❑ WAIVER(S)(IF APPLICABLE) 3 9.5 YES NO n I
DIRECTIONS TO SITE AND SITE CONDITIONS:(ex.locked gate)
COLE RD TO EAST ON COOK PLANT RD TO SITE ON THE LEFT.
I-
0
SITE MUST BE FLAGGED FROM MAIN ROAD AND TEST HOLES MUST BE FLAGGED WITH TEST HOLE NUMBERS.
OFFICIAL USE ONLY BELOW THIS LINE
UPGRADE/FAILURE SOURCE(for reporting purposes)
❑VOLUNTARY ❑MAINTENANCE/PUMPING❑ BUILDING PERMIT❑HOME SALE❑COMPLAINT OTHER:
INSPECTOR SOIL LOGS COMMENTS/CONDITIONS
RECORD DRAWING AND INSTALLATION REPORT
SOIL CODES:
V=VERY G=GRAVELLY S=SAND L=LOAM Si=SILT C=CLAY E=EXTREMELY R=ROOTS REQUIRED FOR FINAL APPROVAL.
S ECTOR SIGNATURE DATE APPLICATION EXPIRATION DATE P LIC TION APPROVED/ISSUED BY DATE
f9 -2t
T11 S M MAY BE SCANNED AND AVAILABLE FOR PUBLIC VIEW ON THE MASON COUNTY WEBSITE Revised:01/09/2026
DEIGN FORM—PAGE ONE Assessor's Parcel Number: 320333400140
A design will be reviewed when 3 copies of each of the following are submitted:
"Completed design form that has been signed and dated. " Scaled layout sketch,including all applicable items on checklist.
Scaled plot plan,including all applicable items on checklist. "Cross-section sketch, including all applicable items on checklist.
This form may be scanned and available for public view on the Mason County Web site.Maximum paper size: 11"X17"
PARCEL IDENTIFICATION
Permit Number: SWG — oC� Designer's Name: ADAM HUNTER
Applicant's Name: Matt Barnhart Designer's Phone Number: 3607531226
Mailing Address:
141 Cook Plant Farm Rd SE Designer's Address: PO BOX 162
Shelton WA 98584 City State Zip OLYMPIA WA 98507
City State Zip Designer's Email JHANDASSOCIATES@HOTMAIL.C
DESIGN PARAMETERS
Treatment Device
®Glendon OSand Filter OMound OSand Lined Drainfield QRecirculating Filter O ATU ❑Other
Treatment Level(check all that apply): ❑ A ❑B ❑ C ❑BL1 ❑BL2 ❑BL3 E ❑N
Drainfield Type
Gravity O Pressure I'Trench O Bed O Sub Surface Drip
Septic Tank/Drainfield Specifications Laterals
Number of Bedrooms 3 Schedule/Class GRAVITY
Daily Flow: Operating Capacity 270 gpd Length 40 ft
Daily Flow: Design Flow 360 gpd Diameter 4 in
Septic Tank Capacity(working) 1200 gal Number 4
Receiving Soil Type(1-6) 3 Separation 12 ft
Receiving Soil App!.Rate 0.8 gpd/ft2 Orifices
Required Primary Area 450 ft2 Total Number of Orifices GRAVITY
Designed Primary Area 480 ft2 Diameter GRAVITY in
Designed Reserve Area 480 ft2 Spacing GRAVITY in
Trench/Bed Width 3 ft Manifold
}t,� a
Trench/Bed Length 160 ft tt [ISclieiiu�1C1s � GRAVITY
r�J S 4,, GRAVITY
Elevation Measurements -t;l Length l fa 36 ft
Original Drainfield Area Slope 14 °/s Diameter 13 a'.�;{i
nI T 4 in
New Slope,If Altered 14 °MAS0N %P�eYe�rrFe��rr n�il� orff'tgurtion used? • Yes ONo
Depth of Excavation Up-slope 30 11�a14
in Transport Pipe
from Original Grade Down-slope 25 in Schedule/Class GRAVITY
Designed Vertical Separation 36 in Length 50 ft
Gravel-based Drainfield Required? OYes ONo 0 Diameter 4 in
Pump Required? Oyes r• No Dosing and Pump Chamber
Pump/Siphon Specifications Number of doses/day N/A
Diff.in Elevation Between Pump&Uppermost Orifice N/A_ft Dose quantity N/A gal
Drainfield Squirt Height/Selected Residual(head) N/A ft Chamber Capacity(flood) N/A gal
Uppermost OrificeOHigher®Lower than Pump Shutoff Pump controls:Please check those required.
Capacity @ Total Pressure Head N/A gpm O Timer ❑ Elapse Meter O Event Counter
Calculated Total Pressure Head N/A ft If Timer: Pump on N/A ,Pump off N/A
Comments
Revised: 6/11/2025
DESIGN FORM—PAGE TWO Assessor's Parcel Number:I320333400140
Permit Number: SWG aO2(p -
DESIGN CHECKLISTS
Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch
Test hole locations `d' Drainfield orientation and layout Reference depth from original grade:
Soil logs V Trench/bed dimensions and V Septic tank
V Property lines critical distances within layout 0' Drainfield cover
V Existing and proposed wells D-Box/Valve box locations
p p Reference depth from original grade
within 100 ft of property V Septic tank/pump chamber and restrictive strata:
Qr Measurements to cuts,banks, and locations
V Laterals, trench bed,top and
surface water and critical areas V Observation port location bottom
V Location and orientation of V Clean-out location V Curtain drain collector
curtain drain and all absorption V( Manifold placement la' Sand augmentation
components
V' Orifice placement Other cross-section detail:
V Location and dimension of V ports/clean-outs
primary system and reserve area � Lateral placement with distance Observation
to edge of bed Other Information
V Buildings
V Audible/visual alarm referenced Yes No
ET Direction of slope indicator Pr Scale of drawing shown on scale fr( ❑ Design staked out
V Waterlines bar V ❑ Recorded Notices attached
V Roads, easements, driveways, V Elevation benchmark and relative ❑ Waiver(s) attached
parking elevations of system,components V O Pump curve attached
0 O Evaluation of failure
Er North arrow and scale drawing
shown on scale bar �t,°' �t �' I Non-residential justification
�C.`.`� Ev,
❑ ❑ Waste strength
.J O ❑ Flow
INA N17AI uCi11TU
A ]��EJSIGN��A PROVAL
The undersigned designer must be notified by installer at time of installation ®Yes O No
3/13/26
Signature o Designer Date
The undersigned has reviewed this design on behalf of Mason County Public Health and determined it to be in
compliance with state and local o e regulations:
En iro e tal Health Specialist Date
CAUTION: DESIGN APPROVAL IS VALID ONLY UNDER THE FOLLOWING CONDITION:
✓ The design is stamped"Approved"by Mason County Public Health.
✓ The Onsite Sewage Permit has not expired,the Permit Expiration Date is: 3 I t !2-1
✓ Drainfield site conditions have not been altered to adversely affect conditions of design approval.
Please Note: The system must be installed by a certified installer,
unless prior authorization is obtained from Mason County Public Health.
An Installation Fee is required.
This form may be scanned and available for public view on the Mason County Web site. Revised: 6/11/2025
f .
PAGE 1
MASON COUNTY HEALTH DEPARTMENT
ON-SITE SEWAGE DISPOSAL SYSTEM DESIGN
SITE#: PARCEL#: 320333400140
DATE SUBMITTED: 3/13/2026 LEGAL/LOT#:
SUBMITTED BY: ADAM HUNTER
APPLICANT: MATT BARNHART
ADDRESS:
I. CALCULATIONS
NUMBER OF BEDROOMS= 3
RESIDENTIAL GPD FLOW= 360
IF NON-RESIDENTIAL-GPD FLOW
WILL BE AS FOLLOWS:
GPD=
APPLICATION RATE= 0.8 GPD/FT2
REDUCTION=LEAVE BLANK IF NO REDUCTION TAKEN
DRAINFIELD SIZING
ABSORPTION AREA= 480 FT2
TRENCH LENGTH OR BED CONFIG.= 160FT
SIZED AT 100%
II.WATERPROOF SEPTIC TANK
COMPOSITION AND SIZE= 1200GAL.CONCRETE
NEW OR EXISTING= NEW
III.DRAINFIELD CROSS SECTION
DEPTH TO DRAINROCK BOTTOM= 2'-6"
ROCK DEPTH BELOW PIPE= 0'-6"
SEPARATION FROM TRENCH BOTTOM TO IMPERMEABLE
MATERIAL/SEASONAL SATURATION= >3'-0"
FILL DEPTH= 1'-6"
TRENCH WIDTH= 3'-0"
r !:
6 F 1l
MASON COUNTY ENVIRONMENTAL HEA
03/13/26
a i0.g
[1 ituUl2
Daf,I J.I IUNTER
.r,1�"51i�FjSl1\:A
NOTES:
X0.0- - • RESTRICTIVE LAYER BELOW: 72"
622.3 SCALE: 1" = 100FT _ ` ,-- _ • FIVE TIMES RULE MET
R/A - • ELAPSE TIME METER AND EVENT COUNTER REQUIRED
1" �(IE93.8}- RISERS TO SURFACE REQUIRED OVER ALL TANK LIDS
_ _ - _ • OPERATION CAPACITY OF THE SYSTEM IS 270 GPD
EXISTING 3 BDRM RES �(I .0}� -. SOIL LOGS:
EXISTING SHEDS/GARAGES _ t� 2.5
r -2 1) LOAMY MED.SAND 0-16"
1 '�
O EXISTING DRIVE (IE. -96 }
GRAVELLY MEDIUM SAND 16-72"
- .. 10.0 2) LOAMY MED.SAND 0-24"
EXISTING WELL - fl R1�PRIMARY RE GRAVELLY MEDIUM SAND 24-72"
5 O EXISTING SEPTIC TANK AND DRAINFIELD AREA(APPROXIMAT � O'� l 98.0) O / 3) LOAMY MED.SAND 0-18"
(1
L 0- GRAVELLY MEDIUM SAND 18-72"
O PROPOSED SHOP W/3 BDRM ADU ,
11 22.5 4)
PROPOSED DRIVE
PROPOSED STUBOUT/CLEANOUT(IE.-106.0) "� 5)
PROPOSED 1200GAL.SEPTIC TANK(IN.EL.-105.5/OUT.EL.-15.2)
10 6)
0 4"PVC TIGHTLINE TO"D"BOX CHAIN LINK FENCE
1 PROPOSED"D"BOX 7)
511.9 --�
12 PROPOSED DRAINFIELD AND R/A FOR ADU
13 PROPOSED WELL TANK DETAIL-NO SCALE
12
13 Q ON 24'A CESSR ERB'
14 WATERLINES 8
15 RBM IS GROUND EL.@ T.H.2(RBM=100.0) a
809.6
_SEE DETAIL
\ _ FRO.E-E P
H SER
PROVED EFFLUENiF
SCALE: 1" = 30FT
HAIN LINK FENCE
CONTOUR LINES PER GIS, REFER TO APPLICATION FOR PROPERTY ACREAGE.
NAVD88 ELEVATION IS UNKOWN
194.9
THIS IS NOT A SURVEY:
site features,topography,elevations and benchmarks are based on assumed datum
provided by the owner and county planning records and are intended only for the review
and construction of the proposed septic system design.Hunter Septic Design
recommends that a licensed professional land surveyor always be used to set corners,
03/13/26
establish lot lines,determine elevations and topography and/or provide a legal site plan.
2 A fee may be charged for final inspection and record drawings
—{ =r{ REVISION LOG:
_ VERSION-DATE
5
3 293.5 ,
A DAr.}J.HURTER
1
14 COLE RD TO EAST ON COOK PLANT FARM RD TO SITE ON THE LEFT. JIM HUNTER & ASSOC DESIGNER:
ADAM HUNTER
1 ° PO Box 162/Olympia,WA 98507
4 t tIJ1 x� Y 360-890-2778/desi ns@hunterse tic.com
F # SITE ADDRESS:
LL t4 [ SEPTIC SYSTEM DESIGN FOR:
141 SE COOK PLANT RD
425. COLE MATT BARNHART
/. 49 I'. COOK PLANT FARM RD SITE LEGAL:
MASON COUNTY ENVIRONMENTAL HEALT 1
PARCEL NUMBER: SITE!PERMIT#: PAGE:
320333400140 1O1`2
GENERAL CONSTRUCTION NOTES (GRAVITY):
TRENCH LENGTH: 160FT
LOAMY SAND/SANDY LOAM
TRENCH WIDTH: 3FT 4"PVC INSPECTION PORT
TRENCH DEPTH: 2'-6" ORIGINAL GRADE
TRENCH SEPARATION:12FT
BACKFILL: APPROVED EXCAVATED MATERIAL
2,_6„ 1,_0„ 4”
GRAVEL: 3/4"TO 2 1/2"WASHED DRAINROCK LIII
PVC PERF PIPE
SEPTIC TANK: NEW 1200GAL WATER TIGHT TANK FILTER FABRIC
q" 2 "WASHED DRAINROCK
"D-BOX"TO BE SET IN CONCRETE AND WATER LEVELED OR USING SPEED LEVELERS.
NOTE:ALL FOOTING AND DOWNSPOUT DRAINS MUST BE DIRECTED AWAY FROM SEPTIC COMPONENTS
36"+TO
RESTRICTIVE
3FT
,ter• \ H
w4 y
w
CD
RISERS ARE REQUIRED TO OR ABOVE FINISHED GRADE OVER TANK LIDS.IF GROUNDWATER OVER THE TOP OF THE TANKS IS A CONCERN
g k.r_j
THEN HIGH GROUNDWATER RATED TANKS WILL BE REQUIRED.THE RISERS MUST BE SEALED WATERTIGHT AT THE JOINT BETWEEN TANK z AND THE RISER. Ui '-
L_
GENERAL NOTES
1. ANY VARIATIONS TO THIS DESIGN SHALL FIRST BE APPROVED BY JIM HUNTER&ASSOCIATES AND THE COUNTY SANITARIAN. . CD
2. OWNER INSTALLER SHALL NOT REMOVE OR DISTURB ANY TOP SOIL WHILE CLEARING TREES AND STUMPS IN DRAINFIELD AREA.
REMOVAL OF TOP SOIL COULD RENDER SITE UNUSABLE.
3. OWNER SHALL BE AWARE OF THE POSSIBILITY OF TANKS FLOATING OUT OF THE GROUND SHOULD THE TANKS BE PUMPED EMPTY
DURING SEASONAL HIGH WATER TABLE CONDITIONS.
4. ALL CONSTRUCTION MATERIALS AND THE INSTALLATION OF THE DESIGNED SEPTIC SYSTEM SHALL CONFORM TO ALL APPLICABLE
STATE AND COUNTY HEALTH DEPARTMENT REQUIREMENTS. TT HUNTER & ASSOC DESIGNER:
ADAM HUNTER
6. THE ADDITION OF AN APPROVED EFFLUENT FILTER IN THE SEPTIC TANK IS REQUIRED TO ENSURE THAT SOLIDS DO NOT PASS TO THE 03/13/26 PO Box 162/Olympia,WA 98507
DRAINFIELD CAUSING PREMATURE DRAINFIELD FAILURE AND COSTLY REPAIRS. ``:
= = 360-890-2778/desi ns hunterse tic.com SITE ADDRESS:
7. ALL REQUIRED TESTS SHALL BE SUCCESSFULLY RUN PRIOR TO CALLING JIM HUNTER&ASSOCIATES FOR FINAL INSPECTION,ALL �" 141 SE COOK PLANT RD
SEPTIC SYSTEM DESIGN FOR:
COMPONENTS,INCLUDING TANK ACCESS LIDS MUST BE ACCESSIBLE FOR INSPECTION.CONTRACTOR SHALL BE RESPONSIBLE FOR '•.; `:i MATT BARNHART
,,• SITE LEGAL:
COST OF RETURN INSPECTIONS DUE TO FAILED TESTS OR INACCESSIBLE COMPONENTS. _'z' r 3 ..
8. THIS IS A SPECIAL DESIGN DUE TO ADVERSE SOIL CONDITIONS,GROUNDWATER TABLE AND/OR TOPOGRAPHY.JIM HUNTER& PAGE:
AD,r2 J,UUNTER � SITE/PERMIT#: 2 OF
ASSOCIATES HAS DESIGNED THIS SYSTEM IN ACCORDANCE WITH ALL STATE AND COUNTY HEALTH DEPARTMENT REQUIREMENTS AND I `I'': :°jI'I'`'„ '`i�' 1'• PARCEL NUMBER:
ASSUMES NO RESPONSIBILITY FOR ITS USE OR LONGEVITY.THE OWNER THEREFORE AGREES TO MAINTAIN AND MAKE ALL NECESSARY • ' 320333400140
REPAIRS TO THE SYSTEM AT NO COST TO JIM HUNTER&ASSOCIATES.