HomeMy WebLinkAboutSWG2026-00172 - SWG Application / Design - 6/2/2026 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: SWG2026-00172 Gj U
APPLICANT FRENCH DOUGLAS G & KRISTIN L Phone:
Address: PO BOX 54 SHELTON,WA 98584-0054
OWNER FRENCH DOUGLAS G &KRISTIN L Phone:
Address: PO BOX 54 SHELTON,WA 98584-0054
SEPTIC DESIGNER DALE TAHJA* Phone: 360-463-8023
Address: 2450 W DEEGAN ROAD WEST SHELTON, WA 98584
SEPTIC INSTALLER TJ GOOS* Phone: 360-490-0217
Address: 150 E MARISA PL SHELTON,WA 98584
Site Address: 1481 E SHELTON SPRINGS RD
Primary Parcel Number: 420122290084
Permit Description: Repair/upgrade to 3bd Nuwater(TLN)to pressure bed-REVISION
7.10.26
Permit Submitted Date: 06/02/2026
Permit Issued Date: 06/17/2026
Issued By: Rhonda Thompson
Current Permit Fees Paid: $1,015.00 (additional fees may be required upon installation of system).
Permit Expiration Date: 06/03/2027 (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 Drainfield 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.
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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.
MASON COUNTY 415 N 6TH STREET,SHELT967 ,E 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
7 Mason County Asbuilt Form, Record Drawing, and Installation fee must be submitted for
final installation approval.
8 Installer must reroute sludge return from Nuwater back into external trash tank to meet
Treatment Level N requirements.
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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.
DESIGN FORM—PAGE ONE Assessor's Parcel Number:
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 y on the Mason County Web site.Maximum paper size: 11"X 17"
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PerrnitNzunber. SWG SWG2026-00172 Designer's Name: Dale L.Tahja
Applicant's Name: Doug French, Designer's Phone Number: (360)463-8023
Mailing Address:
P.O.Box 54 Designer's Address: 2450 W. Deegan Rd.W.
Shelton,WA 985£ City State Zip Shelton WA 98584
City State Zip Designer's Email daletahja@gmail.com
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Treatment Device❑ Glendon ❑ Sand Filter ❑Mound ❑ Sand Lined Drainfield ❑Recirculating Filter I /ATU NuWater BNR-500 ❑Other
Treatment Level(check all that apply): D A 1'Bai B tJ C ❑SLl BL2 'BL3 'E 'N
Drainfield Type
❑ Gravity V4Pressure ❑Trench i"Bed ❑ Sub Surface Drip
Septic Tank/Drainfield Specifications _______ Laterals
Number of Bedrooms 3 Schedu ads Sch.40
Daily Flow: Operating Capacity 270 gpd Length -'1 N 40 ft
Daily Flow:Design Flow 360 gpd Diamet �' 1.25 in
Septic Tank Capacity(working) 1,000 gal Numbe ^ �t 3
Receiving Soil Type(1-6) 1 Separati 3 ft
Receiving Soil Appl.Rate 1.0 gpd/ft2 riflces
Required Primary Area 360 ft2 Total N bgr-Oes ,�
Designed Primary Area 360 ft2 Diameter 1/8 in
Designed Reserve Area 360 ft2 Spacing 24 in
Trench/Bed Width 9 ft Manifold
Trench/Bed Length 40 ft Schedule/Class Sch.40
Elevation Measurements Length 6 ft
Original Drainfield Area Slope 2 % Diameter 1.5 in
New Slope,If Altered 1 % Preferred manifold configuration used? O Yes VNo
Depth of Excavation Up-slope 25 in Transport Pipe
from Original Grade Do slope 24 in Schedule/Class Sch.40
Designed Vertical Separation 24 in Length 20 ft
Gravel-based Drainfield Required? ❑Yes !1'No Diameter 2 in
Pump Required? Lo'Yes O No Dosing and Pump Chamber
Pump/Siphon Specifications Number of doses/day 4
Diff.in Elevation Between Pump&Uppermost Orifice 6 ft Dose quantity 67.5 gal
Drainfield Squirt Height/Selected Residual(head) 6 ft Chamber Capacity(flood) 1,000 gal
Uppermost Orifice O Higher O Lower than Pump Shutoff Pump controls:Please check those required.
Capacity @ Total Pressure Head 30 gpm l Timer Pf Elapse Meter &' Event Counter
Calculated Total Pressure Head 18 ft If Timer: Pump on 2.25 min ,Pump off 5 hrs 57.75 min
Comments APPROVED
JUL 102026
MASON COUNTY ENVIRONMENTAL HEALTH Revised: 6/11/2025
RET
DESIGN FORM—PAGE TWO Assessor's Parcel Number[4 JE0 1 2 2 2 9 0
Permit Number: SWG
DESIGN CKIAsx
Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch
Test hole locations it Drainfield orientation and layout Reference depth from original grade:
Soil logs P1 Trench/bed dimensions and V Septic tank
V Property lines critical distances within layout 9 Drainfield cover
V Existing and proposed wells V D-Box/Valve box locations Reference depth from original grade
within 100 ft of property i' Septic tank/pump chamber and restrictive strata:
O Measurements to cuts,banks,and locations 9 Laterals,trench/bed,top and
surface water and critical areas V Observation port location bottom
Vd Location and orientation of V Clean-out location ❑ Curtain drain collector
curtain drain and all absorption V Manifold placement V Sand augmentation
components V Orifice placement Other cross-section detail:
V Location and dimension of V Lateral placement with distance V Observation ports/clean-outs
primary system and reserve area to edge of bed
- Buildings Other Information
Audible/visual alarm referenced Yes No
V Direction of slope indicator Or Scale of drawin shown on scale g O Design staked out
Ef Waterlines bar O O Recorded Notices attached
V Roads,easements,driveways, 'Elevation benchmark and relative ❑ O Waiver(s) attached
parking elevations of system components V O Pump curve attached
V North arrow and scale drawing ❑ ❑Evaluation of failure
shown on scale bar Non-residential justification
❑ ❑Waste strength
❑ ❑Flow
DESlG APPROVAL
The undersigned designer m be notified b stall i\at time of installation V'Yes ❑ No
Signature of Designer Date
The undersigned has reviewed this design on behalf of Mason County Public Health and determin m w
compliance with state and local on-site regulations:2
v U l 1 L� '(���• �f�. NFMW I
Environmental Health Specialist D
CAUTION: DESIGN APPROVAL IS VALID ONLY UNDER THE FOLLOWING CO
✓ The design is stamped"Approved"by Mason County Public Health. o —'
✓ The Onsite Sewage Permit has not expired,the Permit Expiration Date is: -
✓ 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
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` APPROVED• JUL 102026
MASON COUNTY ENVIRONMENTAL HEALTH =
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DUALPORTAERATOR—
WATERTIGHT O n
RISERS(TYP) Z"t
2"COUPLING I (TYP) COUPLING&PIPE z U
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REDUCER I ~ O O
2"TEECN&R GROMMET o LO O ¢ci o 0 0
( 36"MAX. CAST IN LID(TYP) AIRLINE IIL E LL
1"PVC(TYP) N CV
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1"PVC SLUDGE
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12"+
2"PVC — TRASH CHAMBER DIGESTER CHAMBER CLARIFIER 0
OPERATING CAPACITY:417 GALLONS OPERATING CAPACITY:421 GALLONS CHAMBER I v+
FLOOD CAPACITY:490 GALLONS FLOOD CAPACITY:494 GALLONS 160 GALLONS
FLOOD:191 GAL.
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APPROVE® ; 53" o Z i
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JUL 10 206 1�
AASON COUNTY ENVIRONMENTAL HEALT I
EXTERNAL TRASH TANK ®f�G I P q "•c f I I ��j Q
• �•••• DIFFUSER BARS(2)
PARALEL TO TANK WALL I W
3I." 3" f SLUDGE RETURN
I/i/ / SIDE VIEW 1.5"TAPERF
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1"=1.45H. 24"BLOWER v
HOUSING CAST
INSTALLATION INSTRUCTIONS STONE-FREE NATIVE SOIL ON TOP OF LID O
1)Excavate tank hole with vertical walls to 1 foot larger than OR COMPACTED SAND 9'-2" —
tank on all sides. OVER STONY SOIL 2)If bottom of hole is stony,install 3"of compact sand&level I
out with screed. 124"RISERS(TYP)
3)Install tank in center of hole,keeping 1 ft.void space on I I I i
all sides. I i I
4)As tank is filling with water,fill in void space with compact
granular(sandy)soil free of large clumps of clay. I I I I 4 8
5)Install rest of system,&affix risers to adapters with I i I I ! I � rxa�o,
waterproof adhesive. I' 1 z"RISER I/ i
6)Perform watertightness test in field as required by local I I
jurisdiction. I TRASH CHAMBER Ii DIGESTER !I CLARIFIERI
7)Upon approval to backfill,carefully backfill with native I �1�
• soils over top of tank.
8)Final grade the surface to avoid chanelling surface TOP VIEW -� "°org,.r,0,,w""��5
water toward tank. 1" z 9 e
Media Gallery X
Liberty Pumps 280 - 1/2 HP Cast Iron Submersible Sump/Effluent Pump (Non-
Automatic)
Performance Curve* 280-Series
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APPROVED
JUL 10 2026
MASON COUNTY ENVIRONMENTAL
RET
Installation/Maintenance
Pressure Distribution/Bed Systems
1. Install bed bottom level and in contour with the ground.
2. Install drainfield during dry weather and soil conditions.Any soil smearing must be
eliminated by hand raking any areas that get smeared.
3. Install audio/visual high-water alarm.
4. Install effluent filter in septic tank outlet or pump vault with 1/16-inch maximum
filtration mesh size.
5. Install check valve in pump outlet line to prevent back-flow into the pump chamber.
6. Install 1/8-inch orifices on 24-inch centers. Install the orifices pointing straight
down(6:00 o' clock).
7. Divert all storm water run-off away from septic system components.
8. No curtain(french) drains allowed within l Oft. of the up-slope edge of the drainfield and
reserve area.
9. No curtain (french) drains allowed within 30ft. of the down-slope edge of the drainfield
and reserve area.
10.Have the septic tank and pump chamber pumped or inspected every 3 to 5 years.
11.Inspect and clean pump screen as needed.
12.Inspect floats and test high water alarm every 6 to 12 months or as needed.
13.All material and workmanship must meet County and State requirements.
14.Install risers on septic tank and pump chamber.
15.Deviation from this approved design without prior approval from the Designer and
Mason County Health Department will make this design null and void.
16.The prepared Site Plan is not a survey, it is the owner's responsibility to verify property
line locations prior to installation. Any discrepancies must be reported to the Designer
immediately.
17. Locate all utilities prior to starting installation.
18. The installer must notify the designer at least 48 hours prior to starting installation.
19. The Designer may have additional charges for redesign work and final inspection.
APPROVED
JUL 10 2126
MASON COUNTY EL , ;(ATI,LNTAL HEALTH
5100214 (%
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