HomeMy WebLinkAboutSWG2025-00207 - SWG Application / Design - 6/2/2026 MASON COUNTY 415 N 6TH STREET,SHELTON,WA 98584
retj, ;. 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: SWG2025-00207 (,000--</
APPLICANT TUCKER VALENTINE GREG RICHARD Phone:
Address: 131 W WYNWOOD DR SHELTON, WA 98584
OWNER TUCKER VALENTINE GREG RICHARD Phone:
Address: 131 W WYNWOOD DR SHELTON, WA 98584
SEPTIC DESIGNER CINDY WAITE* Phone: 360-701-0205
Address: 80 E PICKERING LANE SHELTON, WA 98584
SEPTIC INSTALLER B-LINE CONSTRUCTION Phone: 1.360.489.9169
Address: 2971 E PHILLIPS LAKE LOOP RD SHELTON, WA 98584
Site Address: 131 W WYNWOOD DR
Primary Parcel Number: 420254490040
Permit Description: New 6bd ATU to pressure trench
Permit Submitted Date: 06/02/2025
Permit Issued Date: 01/27/2026
Issued By: Rhonda Thompson
Current Permit Fees Paid: $725.00 (additional fees may be required upon installation of system).
Permit Expiration Date: 06/26/2028 (based on date of inspection)
Permit Conditions:
1 Proposed development subject to zoning requirements and approval by the planning
department staff per Mason County Title 17.
2 Permit must be installed by a Mason County Certified Installer unless prior written
authorization from Mason County is obtained.
3 Drainfield installation not to exceed designed upslope and downslope depth specified on
design form.
4 Installer is responsible for obtaining Mason County installation approval prior to backfill of
system components.
5 Installer is responsible for obtaining Septic Designer/Engineer installation approval prior to
backfill of system components.
6 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.
OFFICIAL USE ONLY
■ ,,, , MASON COUNTY DATE RECEIVED: Y
/V� csz - �� cn D
C
�■fAi■
AMOUNT RECEIVED: RECEIVED BY:
CO
'"*_,,..... ." "`""i4Public Health & Human Services CO
co
Environmental Health 360-427-9670,ext.400 or 360-275-4467,ext.400 r �// L O
07
415 N.6th Street - Shelton,WA 98584 S W V ZoZ- - O0 2 c) r Z x
ON-SITE SEWAGE SYSTEM APPLICATION
m n
APPLICANT PHONE ITI
RICHARD VALENTINE CIO 6td�T 360-426-4221 z
MAILING ADDRESS-STREET.CITY,STATE,ZIP CODE 7g
131 W WYNNWOOD DR I wl
SHELTON WA 98584 m
SITE ADDRESS-STREET,CITY,ZIP CODE ••
Cad
131 W WYNNWOOD DR SHELTON WA 98584 I
S
NAME OF DESIGNER PHONE
CINDY WAITE "- N
NAME OF INSTALLER PIAPHONE v
B-LINE CONSTRUCTION o , m 360-426-4221 '<_
PERMIT TYPE(select one) DRINKING WATER SOURCE - I N)
M RESIDENTIAL OSS fl COMMUNITY OSS fl COMMERCIAL OSS 4 PRIVATE INDIVIDUAL WELL ❑ PRIVATE TWO-PARTY WE'_L z I
TYPE OF WORK(select one) a PUBLIC WATER SYSTEM t
k NEW CONSTRUCTION/UPGRADES ❑ REPAIR/REPLACEMENT OTHER DETAILS(select all that apply) O TABLE X REPAIR I
SUBMITTALS O SURFACING SEWAGE O EXISTING FAILURE O SHORELINE
CO
pr DESIGN FORM(REQUIRED) 1I SEPTIC DESIGN(REQUIRED) BEDROOMS LOT SIZE WAS LOT CREATED AFTER 4/1/2025? b I MI 4:-
I5-WAIVER(S)(IF APPLICABLE) 6 45711§A O YES Q n I
NO X I
DIRECTIONS TO SITE AND SITE CONDITIONS (ex locked gate)
GO OUT CLOQUALLUM ROAD, TURN RIGHT ONTO WYNNWOOD DR, GO TO FIRST I o
DRIVEWAY ON THE LEFT. IT IS GATED PLEASE CALL TAYLOR TONEY AT
360-426-4221 OR 360-489-9169 BECAUSE THE OWNERS LOCK THE GATE AND ARE o O
NOT AT THE SITE. I -
SITE MUST BE FLAGGED FROM MAIN ROAD AND TEST HOLES MUST BE FLAGGED WITH TEST HOLE NUMBERS. I O
OFFICIAL USE ONLY BELOW THIS LINE
UPGRADE/FAILURE SOURCE(tor reporting purposes)
❑VOLUNTARY O MAINTENANCE/PUMPING O BUILDING PERMIT O HOME SALE ['COMPLAINT O OTHER:
INSPECTOR SOIL LOGS `r ( u I COMMENTS/CONDITIONS
y \� D' �� V6S L-'
I l
-\ - a 0 '7, L= (tips e''
9 vevit. I ,
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.
INSPECTOR SIGNATURE DATE APPLICATION EXPIRATION DATE APPLICATION APPROVED/ISSUED BY DATE
PISTVVON Ivy2k( 1 P/ 2 t' jla f7% I
THIS FORM MAY BE SCANNED AND AVAILABLE FOR PUBLIC VIEW ON THE MASON COUNTY WEBSITE Revised:4/14/2025
DESIGN FORM—PAGE ONE Assessor's Parcel Number: 4 2 0 2 5 4 4 9 0 0 4 0
A design will be reviewed when 3 conies 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"X 17"
PARCEL IDENTIFICATION
Permit Number: SWG — J - On 2b-7 Designer's Name: CINDY WAITE
Applicant's Name: VALENTINE CIO B-LINE CONST Designer's Phone Number: 36O-7O1-O2O5
Mailing Address: 131 W WYNNWOOD DR Designer's Address: 80 E PICKERING LANE
SHELTON WA 98584 City State Zip SHELTON WA 98584
City State Zip Designer's Email cindyewaite@msn.com
DESIGN PARAMETERS
Treatment Device J
❑ Glendon O Sand Filter O Mound O Sand Lined Drainfield O Recirculating Filter 1$ATU BNR1500 O Other
Treatment Level(check all that apply): ❑ A VIg °1 y O BL I YJrc 1KJ BL2 'D pL3 ,t E N
Drainfield Type
❑ Gravity 'Pressure O Trench i — _, O Sub Surface Drip
Septic Tank/Drainfield Specifications /L-.1)
L rats
Number of Bedrooms 6 Schedule/ .k N SCHEDULE 40
Daily Flow: Operating Capacity 540 gpd Length IL/L9 Co 5O ft
Daily Flow: Design Flow 720 gpd Diameter 1.25 in
Septic Tank Capacity(working) 1200 TRASH&BNR 500 gal Number `=`J . 6
Receiving Soil Type(1-6) 4 Separa .—s!`��� 9 ft
Receiving Soil Appl. Rate .8 FROM COL B d/ftz ,.mow m
gp ; Ph • Orifices
Required Primary Area 900 ft2 Total N _R<t r o 60
Designed Primary Area 900 ft2 Diame, •o' ek 34 3/16 in
Designed Reserve Area 1200 ft2 .1:'': `•'
Spa it `4 ,tp__ 60 in
Trench/Bed Width 3 ft 1.,' 51O448' 11,/1;4 anifold
Trench/Bed Length 300 tewNDY DESIGN R .
g ft � �dui�B VVAITE� • • 1 SCHEDULE 40
Elevation Measurements 1-2 ft
LX6 iktS b.iG
Original Drainfield Area Slope 4 % Diameter 2 in
New Slope,If Altered % Preferred manifold configuration used? GifYes O No
Depth of Excavation Up-slope 12 in Transport Pipe
from Original Grade Down-slope 10
in Schedule/Class SCHEDULE 40
Designed Vertical Separation 12 in Length 50 AND 55 ft
Gravel-based Drainfield Required? FYI Yes O No Diameter 2 in
Pump Required? lE1 Yes O No Dosing and Pump Chamber \\ail
Pump/Siphon Specifications Number of doses/day 6
Diff. in Elevation Between Pump&Uppermost Orifice 5 ft Dose quantity 90 gal
Drainfield Squirt Height/Selected Residual(head) 2 ft Chamber Capacity(flood) 1475 gal
Uppermost Orifice O Higher C 'Lower than Pump Shutoff Pump controls: Please check those required.
Capacity @ Total Pressure Head 35.4 gpm g Timer I Elapse Meter 6i' Event Counter
Calculated Total Pressure Head 7, £5 ft If Timer: Pump on ,Pump off
Comments
SEE PAGE 12 ITEM 1. CONTROLS TO BE SET AT TIME OF INSTALLATION, CONTACT DESIGNER
PRIOR TO STARTING INSTALLATION.
Revised: 6/11/2025
DESIGN FORM—PAGE TWO Assessor's Parcel Number:L4 21 0 2I5 4 4 9j010 0 f 0 4 1 0
Permit Number: SWG 2o. - 0 0+24'7
DESIGN CHECKLISTS
Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch
ie Test hole locations IX Drainfield orientation and layout
Soil logs y Reference depth from original grade:
gi g if Trench/bed dimensions and Q( Septic tank
it Property lines critical distances within layout Drainfield cover over ?t /0
Fiki e 1
Qf Existing and proposed wells f D-Box/Valve box locations Reference depth from original grade
within 100 ft of property laf Septic tank/pump chamber and restrictive strata:
Vi Measurements to cuts, banks,and locations in.yp
surface water and critical areas 11 Laterals,trench/bed,top and
Observation port location
bottom paqe V
al f-Location and orientation of ' Clean-out location O Curtain drain collector
curtain drain and all absorption it Manifold placement 0 Sand augmentation
components
liir Orifice placement pagc L/ Other oss-section detail:
IX Location and dimension ofObservation
primary system and reserve area 11 Lateral placement with distance ports/clean-outs
to edge of bed ?
ilf
Buildings Other Information
V Audible/visual alarm referenced Yes No
lie Direction of slope indicator 4-1/421 1"' O Design staked out
Scale of drawing s o on scale Fif 21 Waterlines bar O O Recorded Notices attached
if Roads, easements, driveways, V Elevation benchmark and relative O O Waiver(s)attached
parking elevations of system components V O Pump curve attached
V North arrow and scale drawing O 0 Evaluation of failure
shown on scale bar Non-residential justification
❑ 0 Waste strength
❑ ❑ Flow
DESIGN APPROVAL
The undersigned designer must be notified by installer at time of installation Gies O No
CL f:-' 1 / 2u2,471�! 2✓7
Signat{re of 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 on-site regulations:
\. (2 ; 26
Environmental Health Spe 'alist 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: fob-C.( 5
/ Drainfield site conditions have not been altered to adversely affect conditions of design approval. .),:vij
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
W /
131
Wynwood Dr, Shelton, WA 98584, USA, Shelton Township, Parcel Id: 420254490040
1. Proposed residence
2. Proposed ADU to be
built in the future
3. Audio visual alarm ( 7GJ �``
4. Clean out Lz) 9' �-�,�
5. 1200 con ------ -------- -------- r
concrete trash tanl(.2) - -------------- ---- - - 0, ------------------►-
6. BNR 500 concrete tank (1) -
7. 1200 concrete pump tank(�7ii - l
8. Transport line‘1..2)
�\ / / i
9. Primary/reserve drainfield(900 s m S' '�SlST
��>> 7.10.Valve box ` p F 'r'` N 5TA lic0'9��., tit I
o
1 'T
11.Proposed ell z, I•- S
Cam^ j p8V-4.1
J/D I
12.Proposed water lin ^� / / (
�j / '
Ci. -cc . l J / T I !--- el I , ,
L /
0 j
1e
a -
9)-- - -, t
�{ Bench Mark
0Original grade 100'
,3U , �G�(rf Trash Tank 99.5'
C�{{) 3 BNR 500 98.5'
C2)._ IT 4 Pump Tank 98'
.,?G' a A Bottom of lateral 98'
Ic Y
TT
y.�v --vv- eau 3
GI S Legend �p _2 VS �(—
WA Mason 1011_ Contours O �� VV(4 4..
vic
JAN 2 3 2026 /o rocd/ 4.1 keree
`'
�j / G.#4r CJ iv
- Scale => 1 in • 30 ft �-�' u�
ORIFICE SPACING 5
Lateral# Length Length Orifice # Distance from Distance from end Length#
# (Feet) (Inches) Spacing" Orifices feeder line of end of lateral
1 50 600 60 10 2.5 2.5 50
2 50 600 60 10 2.5 2.5 50
3 50 600 60 10 2.5 2.5 50
4 50 600 60 10 2.5 2.5 50
5 50 600 60 10 2.5 2.5 50
6 50 600 60 10 2.5 2.5 50
300 60 295
TRANS LENGTH 45
GPM I 35.4
K (2" SCHEDULEN 40) 284.5
FRICTION LOSS 0.9523933
Squirt I 2
Elevation difference 5
I TDH 7.9523933
9D` (off 60
1 30
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TRENCH CROSS SECTION ��CENS p W I ER
14 PD�O CX['IRL$ 0510
SAN E�
�gS0NC0UN�,EN1� 2026
3* �� .v RET NMENTAL HEALTH
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APPROVED
JAN 2 7 2026
DRAINFIELD LAYOUT MASON COUNTY ENVIRONMENTAL HEALTH
RET
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X1=CLEANOUT/OBS PORTS IN PIT VAULTS(4 ) ta
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X2=D BOXNALVE BOX/ /? 5'
`` CINDY E
X3=Check Valves LICENSED E N
�6 ) / ,V Vet /tie -':47.",--_,N7.-- - _-"`
X4=Flow Control Valves '�
X5=Soil Logs o ni p�,f ��� v�'�-��•�.�
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JAN 2
4,' sore c1202s
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Rr r 11C 11.1 -11F
RISER WITH LOCKING LID
TO DRAINFIELD
PRESSURE LATERALS
A G -c, A
�� t� _,
! FLOW CONTROL VALVE
'El 6 ,.
SLOTS AS
REQUIRED
�`
_H t l �:-) � ____ 1 .
`-� FLAP CHECK ''..'),,,: ,.1.,;;;;F i\',',.-f,',,,,
VALVE /,;(-;',.-\' '\\
�y��Q- ,� (� cy�`�,�1cc
LONG SWEEP 90 , _.W _._.__ (:T,� 1 QTY °1171 i32'q��q (-„
DEGREE ELBOW fi
SECTION -
WASHED ROCK
DRAIN SUMP $16)4
Q A
TRANSPORT PIPE FROM i 1 •% 11',
PUMP CHAMBER 4.7 N�" A N
61 0041 \\\ F ,V
\.,1,
• UCENS ESIG „.
fir
'
EXPIRES US 10% '
�� ,
DRAINFIELD CONTROL BOX
(SLOPING GROUND: MANIFOLD BELOW LATERALS)
'4pPROVE
JAN 2 7 2026
MASON COUNTY ENwRON IENTAL HEALTH
RET
THREADED CAP OR PLUG
P ti- v& t4- 6"PVC
LAST ORIFICE;WITH
ORIFICE SHIELDS IF
ORIFICE ORIENTATION IS
BACKFILL V �� �� UPWARD
MATERIAL \\' '\` \N\
6" 24"
oOC o �— PRESS\\!;-:-/\._ 0(6-)o O�fo DO URE LATERAL
PVC HOSE OR /\ 0 0 0 0 0°oa oo AS SPECIFIED
LONGELBOW EEP �\/ a °j \�°�
DRAIN ROCK;6"MIN.
BELOW PIPE
UNDISTURBED SOIL -/
---- 6"PVC WIT DRAIN
HOLES; D TO
BOTTOM O VEL TO
MONIT O NG
L INFILTRATIVE SURFACE6)4
v N +
MONITORIN DYEICLEANOUT P CIN 18 TE V \-1* 27U4
(EXAMPLE) • LICENSED DESIGNE }
IhPiRLS 05/10i
T4 s, ✓ ,,J
I2_ o0 6s.-1 ¢ ‘ d
FINISHED GRADE
24"RISERS WITH BOLT ON LIDS
CLEANOUT
\II \
FT. I
F 3
BAFFLE
CLARIFIED ZONE
EFFLUENT FILTER
APP
Li
R O ,2o P
JAN 27 2026 �� 4 , �, •,
MASON -, 5,Qn4,a �t<‘4_
COIN"ENV1R0 a CINDY E WAITE :
NMENTAL HEALTH�� LICENSED DESIGNER ,I�
RET
lkoi,4LS LJ-10,
IN3
y9'-2" y
WATERTIGHT LID VENT(typ) DUAL PORT AERATOR
RISERS(TYP)
i
36"MAX. 1"PVC(TYP) 1
4I1
1/2"PVC MASTIC
\ � cp
SI L,/ AIRLINE
4"
/ I \ 2"COUPLING I' ''
&REDUCER 6"
-
2"TEES "---�_ _�_ - \ \412„ 1.PVC SLUDGE
RETURN LINE
2"PVC -� R
TRASH CHAMBER DIGESTER CHAMBER CLARIFIER
OPERATING CAPACITY:417 GALLONS OPERATING CAPACITY:421 GALLONS CHAMBER
FLOOD CAPACITY:490 GALLONS FLOOD CAPACITY:494 GALLONS 160 GALLONS
65" 58" FLOOD:191 GAL.r—54"
50"
53"
36" o 0 APPROVED :°:0. ° 0
TEE
0
JAN 2 7 2026 • � "
,2"
MASON COUNTY ENVIRONMENTAL HEALTH • '_`-PARALEELT O RS(2)
WALL -
3 RET 4
\ \ -- SLUDGE RETURN
/ AP
gIDEVage( /cTERk
=1.4 STONE-FREE NATIVE S 4�r '" -) "
OR COMPACTED SAN a
OVER STONY SOIL
INSTALLATION INSTRUCTIONS I y^� „� ,N�c� 0�
1)Excavate tank hole with vertical walls to 1 foot larger than 0 INDY L Al 1"I
LICENSED DESIGNE
tank on all sides.
•2)If bottom of hole is stony,install 3"of compact sand&level 4" 9'-2" ��' -. 2
.
out with screed. _ \
3)Install tank in center of hole,keeping 1 ft.void space on P r
all sides. 24"RISERS'II���rP) 24"BLOWER
4)As tank is filling with water,fill in void space with compact I OUSING CAST!
granular(sandy)soil free of large clumps of clay. N TOP OF u
5)Install rest of system,&affix risers to adapters with
waterproof adhesive. a'-6"
6)Perform watertightness test in field as required by local I
..)(9
jurisdiction. 12"RISER
7)Upon approval to backfill,carefully backfill with native II I
soils over top of tank. TRASH CHAMBER DIGESTER I I CLARLFIER
8)Final grade the surface to avoid chanelling surface L _ I L _i L ____
water toward tank.
TOP VIEW
1" R. f''
1'=2.8
0 ..At AEROBIC TREATMENT TANK DETAIL FOR
"1:-...w. Nu WA TER BNR-500 TREATMENT UNIT
ig I� :
' , gpil
1m -. ENVIRO-FLO, INC. REVISED:
\•,� ^� r Wastewater Treatment Technologies 3/01/12
P.O.BOX 321161, Flowood, MS 39232 SCALE
_-___ (877) 836-8476 (601)845-4716 fax 1" = 1 4 ft.
www.enviro-flo.net
SECURED)do WITH GAS TIGHT SEAL
THREADED UNION
24•DIAMETER
ACCESS RISER
FINISH GRADE SERVICE
VALVE*
FROM SEPTIC
TANK } TO DR'AINFIELD
I
EMERGENCY STORAGE
ANTI SIPHON
HIGH WATER ALARM LEVEL VALVE*
WORKING VOLUME INDEPENDENT
FLOAT STEM
NORMAL TIMER OFF LEVEL
FOR FLOAT
ENCLOSED PUMP MOUNTING
SEDIMENT SHROUD* CHECK VALVE
18„
SEDIMENTS SUBMERSIBLE
..1
I CENTRIFUGAL
PUMP
PUMP-CHAMBER
*AS NEEDED
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LICENSED DESIGNER
APPROVED
JAN 2 7 2026 tO\3
MASON COUNTY ENVIRONMENTAL HEALTH
RET
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Installation Notes
Pretreated Pressure Distribution System:
42025-44-90040 131 W Wynnwood Dr
1. Drainfield has been sized for two residences (one primary and one ADU).
Each residence will be using the d.ra:infiekl but will have their own
tankage:(trash„ BNR 500 and pump tank) Primary residence tankage will
be installed with the six bedroom drainfield and at the time When ADU will
be built, their tanks will be installed).Timers will be set for the total
operating capacity and When,ADU is built,timers will be set at 270GPD for
each residence.
2. I used Column B for sizing primary drainfield and Column A for sizing
reserve
3. The prepared site plan is not a survey. It's the owner's responsibility to verify property
lines, utility lines (water, sewer, power, phone and gas) prior to installation.
4. Install system during dry weather with acceptable soil conditions
5. The tanks may be moved as necessary to accommodate building requirements. Septic
tank location must meet all required setbacks.
6. BNR 500 must be installed in concrete tank
7. Trash and pump tank must be concrete
8. Gravel based drainfield required
9. Keep wheeled vehicles off the drainfield area before, during and after installation.
Tracked equipment only,
10. All ground, surface water and roof drains must be diverted away from the septic tanks
and drainfield. Ensure the final grade slopes away from these areas and water doesn't
collect on or around them. Use swales, berms, catch basin and tight lines, curtain
drains, etc. to divert all waters.
11. Curtain drains can be no closer than 10' upgradient and 30' down gradient of the
drainfield
12. Exposed restrictive layers, cuts, banks, etc. can be no closer than 50' downhill from
the drainfield.
13. Install access risers on the septic tanks, valve box and ends of laterals.
14. Make sure septic tank risers are epoxied or caulked to cast in riser rings on tank.
15. Lids must form a water and gas tight seal with the access risers
16. This system must be installed by a Mason County Certified installer or
17. Deviation from this design without prior approval from the designer and Mason County
Health Department will make this design null and void.
18. This design was sized per Washington Administrative CodeWAC246-272A-0230. The
operating capacity is based on 45 gallons per day per capita with two persons .r
bedroom. The minimum design flow per bedroom per day is the operating ca of
ninety gallons multiplied by 1.33. This results in a minimum design flow of o, h.1 red
twenty gallons per day. This creates a surge factor of 33% but anticipated is . \\5
ninety gallons per bedroom per day.
19. Install bed with contour of the ground --11-' .,�' 2
JAN 2 7 2026 ,`P 510(418
p CINDY E WAKE
MASON COUNTY ENVIRONMENTAL HEA LICENSED DESIGNER
RET <<. .
20. Install trench bottoms level and always maintain a minimum of six inches into native
soil
21. Install locator tape on top of all drainfield laterals.
22. Install threaded clean outs at the ends of all laterals (caps must extend to within six
inches of finish grade and be in a valve box as shown on diagram.
23. Install audio/visual alarm
24. Filter fabric required over drain rock prior to backfilling. If the drain rock extends above
the original grade, run the filter fabric at least 2 inches down the trench wall.
System Owner Responsibilities:
1. Operation and Maintenance is required by Washington State Department of Health and
Mason County Health Department.
2. The septic tank and pump tank should be pumped every three to five years or as
needed.
3. System owners are responsible for having maintenance performed annually.
4. System owners are responsible for responding to septic issues in a timely manner.
5. System owners shall not at any time change or alter settings in the control box.
6. System owner agrees to read and abide by information regarding their system in the
User Manual provided by Mason County Public Health.
7. Keep the flow of sewage at or below the approved design operating capacity.
8. Keep waste strength at residential waste strength parameters.
9. Spread loads of laundry through the week.
10. Do not use excessive bleach or detergents with added whiteners.
11. Do not shower, do laundry and dishwasher at the same time
12. Antibiotics can kill or impair the biological process in the septic tank.
13. Leaky plumbing can hydraulic overload your on-site septic system.
APPROVED
JAN 27 2026 Aga
lb 1,
MASON COUNTY ENVIRONMENTAL HEALT A.4.1RET � _ ,1p
51004.19 "cc),4 '
o CINDY E 'NAITE �y�
LICENSED DESIGNER
L';• ti..S S 10t 1