HomeMy WebLinkAboutSWG2023-00408 - SWG Application / Design - 9/25/2023 (2) MASON COUNTY 415N fiSH ELTON: , H70,EXT 400
SH STREET,
S SELTOELTON, A9 5M
g# BELFAIR:3601 EXT 400
Public Health & Human Services ELM:360-4825269,EXT400
FAX:360-427-7787
On-Site Sewage System Permit: SWG2023-00408
APPLICANT WALSH/SHIH FAMILY TRUST Phone:
Address: THOMAS WALSH & LORENA SHIH TRUSTEES SEATTLE,WA 98115
OWNER WALSHISHIH FAMILY TRUST Phone:
Address: THOMAS WALSH &LORENA SHIH TRUSTEES SEATTLE,WA 98115
SEPTIC DESIGNER CINDY WAITE-Septic Designer Phone: 360-701-0205
Address: 80 E PICKERING LANE SHELTON,WA 98584
Site Address: 372 SE Mall Rd
Primary Parcel Number: 320233200140
Permit Description: REVISION: 3-bedroom OSCAR X02 system wl OS-100 coils: REPAIR
Permit Submitted Date: 09/25/2023
Permit Issued Date: 04/01/2024
Issued By: David Anderson
Current Permit Fees Paid: $945.00 (addimnai leas may ea reaw,ed upon installation of sysli
Permit Expiration Date: 1010312024 (Daaedpndaleounspestbn)
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 Certirred 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 Asbullt 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/onsiteloss-Inspection-request.php or call:
360-427.9670,extension 400.
OFFIlkUSE ONLY
MASON
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COMMUNITY ERVICES ALIOUNTRttRolk KOOKDIV Im
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THOMAS WALSH 2O6-660-7634 �7
MAIUNGADORE55-MEET.CITY,STATE.ZIP CODE O
5001 SUNRISE VISTA SEATTLE WA 98584 IT
SITE ADDRESS STREET.CITY,ZIP CODE
372 SE MELL RD SHELTON WA 98584
NAME OF DESIGNER PHONE I N
CINDY WAITE 360 701-0205
NAME OF INSTALLER PHONE
TBD I N
PERMIT TYPE(MASS oIMI - DRINKING MTER SOURCE
9RESIDENTIALOSS FICOMMUNITYOSS OMMERCWLOSS Fy3 PRIVATE INDIVIDUAL WELL G PRIVATE TWPPARTY WELL IW
TYPE OF NORM IMME..) IS PUBLIC MMTER SYSTEM I
FI NEW CONSTRUCTION I UPGRADES f7RE IREPLACEMENT OTMlROETaLStMEO0tAMmWy) 0TABLE IX REPAIR IW
SUBMITTALS ❑ SURFACING SEWAGE ❑EXISTING FAILURE ❑SHORELINE
y9DESIGN FORM(REQUIRED) AISEPTICDE I N(REQUIREO) SEIMMO LOT SIZE N
Fl WAIVER(SI(IF APPLICABLE) 3 I p
DIRECTIONS TO SITE AND SITE CONMTIONS:NB bchatl WI
GO OUT ARCADIA ROAD, TURP I LEFT ONTO OLD ARCADIA ROND, TURN LEFT ONTO I o
MELL RD, PARCEL IS AT THE END OF MELL ROAD. c
0
SRE MUSTBE RAGGED FROM--RBAO AND rESTHOLES USTSEFLAGGEO MrH TESTNOLE NUMBERS. I IO
_-- -OFFICIAL USE ONLY BELOWTHIS LINE-- ---- _
UPGRADE IFAo.URE SOURCE(WMNESNIPM )
❑VOLUNTARY E3MMNTENANCEIPUMPING E38 ILDINGPERMIT ❑HOMESALE 000MPLVNT E30THER:
INSPECT01190M1LOG3 COMMENTSICONDITIOH6
06 06 IUI17/loZ3, I
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TP: 6-z )I ems
RECORD DRAWNG AND INSTALLATION REPORT
SOILCO =GI
v•VERv OGRAVELLY S•SANO L•LOAM &=51L -CLAY E=EXTREMELY R•ROOTS REOUIREDFORFMALAPPROVAL.
INSPECTOR 91GNATUPE
DAIE (CATION EXPIRATION DATE APZ:�
DBY DATE
z5 �aISfZ
REVISED 1Nrz015
THIS FORM MAY BE S ANNED AND AVAILABLE POP SLIC VIEW ON THE MASON COUNTY WlBSITE
I
DESIGN FORM—PAGE ONE Assessor's Parcel Number: 3 2 0 2 3 — 3 2 — 0 0 1 4 0
design will be reviewed when 3 conies of each of the following are submitted:
FerApplicamit's
omplored design form that has been signed and dated. °Scaled layouts etc ,i cluding all applicable items on checklist
caled plot plan,including all applicable items on checklist, v Cross-section sketch, i cluding all applicable items on checklist.
This form me ra
be scanned and i llabla W Ioft.for public vle on the Mason County W N .Maximum a er size: /I"X17"
PARCELIDENTIFICATIONmit Number: SWG za7;'GO qo Designer's Name: CINDYWAITE
Name: THOMAS WALSH Designer's Phone Numbers 360-701-0205
Mailing Address: SWl SUNRISE VISTA Designer's Address: 80 E PICKERING LANE
SEATTLE WA 08118 SHELTON WA swu
Ci State Z' CityState Zia
DESIGN PARAMETERS
Treatment Device
[]Glendon Siofiian ❑Send Filter ❑ Mound ❑ Said Lined Drainfield ❑Rai mulating Filter,Type:
0 Aerobic Unit Make/Model ❑Disinfection Unit Make/Model Other. XO J
Dminfield Type QyF
0 Gravity ❑ Pressure ❑Trench 0 B 0 Sub Surface
Septic Tank/Drainfield Specifications Laterah
Number of Bedrooms 3 Schedule/Class NETAFIM
Daily Flow:Operating Capacity 270 ✓ gpd Length 100
ft
Daily Flow;Design Flow 360 gpd Diameter in
Septic Tank Capacity(working) 1200 gal Number S
Receiving Soil Type(1-6) 3 - &DiK
i. .5 ft
Receiving Soil Appl.Rate .8 , gpd/ftr Orifices
Required Primary Area ftZ Oriffes 3X100=300
Designed Primary Area 460/ f? T EMITTER in
Designed Reserve Area 450 ft= in
TrenchBed Width 21.4Manifold
Trench/Bed Length 21.5 ftTa SCHEDULE40
Nan
Elevation Measurements 120 It
e Nwes ay�o
Original Ihninfield Area Slope 5 yo Diameter 1 in
New Slope,If Altered % Preferred manifold cc figmmiol used? 0 Yes 0 No
Depth of Excavation Up-slope 0 in Transport Pipe
from Original Ginnie Down-slope 0 in Schedule/Cless I N/A
Designed Vertical Separation 12 in Length tt
Gravelless Chambers Required? Cl Yes O No 0 Optional Diameter in
Pump Required? Rif Yes 0 No Doing mad Pump Chamber
Pump/Siphon Specifications Number of oses/day 411
Diff.in Elevation Between Pump&Uppermost Orifice_ft Dose quantity .75 gal
Dminfield Squirt Height/Selected Residual(head) _ft Chamber Capacity(fit ) 1200 gal
Uppermost Orifice If Higher 0 Lower than Pump Shutoff Pump controls:Please check those required.
Capacity @ Total Pressure Head gpm tTimer h(Elapse Meter lif Event Counter
Calculated Total Pressure Head <50 ft If Timer: Pump ori 30 we ,Pump off 3 min
Comments IV
INSTALLER WILL CALL DESIGNER WITH ANY QUESTIONS, CON CRETE TANKS REQUIRED.,
JUTE THE DRAINFIELD. F,11eu )ei
DESIGN FORM—PAGE TWO Assessor's Parcel Number: 3 2 0 2 3 — 3 2 -- 0 0 1 4 0
Permit Number. SWG
DESIGN CHECKLISTS
S�c/Aled Plot Plan Se led Layout Sketch Cross-Section Sketch
;,Test hole locations CiV Dminfield orientation and layout, Reference depth from original grade:
y Soil logs lif Trench/bed dimensions and & Septic tank
IJ Property lines � ritical distances within layout� ID/Dreinfield cover
Existing and proposed wells / D-BoxNalve bO locations Reference depth from original grade
,.,/within 100 ft of property la Septic tank/puppS1�aTAlSer and restrictive strata:
Y Measurements to cuts,banks,and locations ILaterals,trench/bed,top and
,�/ bottom
surface water and critical areas Observation port location
C Location and orientation of ❑ Clean-out location ❑ Curtain drain collector
curtain drain and all absorption W Manifold placement ❑ Sand augmentation
components 010 ❑ Orifice placement PJ.(w Other cross-section detail:
S/Location and dimension of GY Observation ports/clean-outs
primary system and reserve area GY Lateral placement with distance W
to edge of bed Other Information
Buildings BY Audible/visual alarm referenced Yes No
dDirection of slope indicator Scale of drawing shown on scale E ❑ Design staked out
L� Waterlines bar ❑ ❑ Recorded Notices attached
Q( Roads,easements,driveways, ❑ ❑ Waiver(s)attached
parking ❑ ❑ Pump curve attached
l� North arrow and scale drawing ❑ ❑ Evaluation of failure
shown on scale bar Non-residential Justification
❑ ❑ Waste strength
❑ ❑ Flow
DESIGN APPROVAL
The undersigned designer must ben trfied by in taller at time of installation�Yes In No
2 e
SignahV of eslgner D to
The undersigned has reviewed this design on behalf of Mason County Public I ealth and determined it
compliance with state and local on-s' gins: � 4 pp 4
L ' f; 0/ZZy
(
Environmental Health Specialist Date
CAUTION: DESIGN APPROVAL IS VALID ONLY UNDER THE FO LOWING CONDITION:
✓ The design is stamped"Approved"by Mason County Public Health.
✓ The Onsite Sewage Permit has not expired,the Permit Expiration Date is: ! IN 5 12a _14
✓ Dminfield site conditions have not been altered to adversely affect conditions of design approval. t
Please Note: The system must be installed by al certified installer,
unless prior authorization is obtained from Mas�n County Public Health.
An Installation Fee is required.
This form may be scanned and available for public view on the Maso County Web site.
Updated Date: 12/72015
Mason County WA GIS W b Map
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TABLE 2
Hydraulic Layout
OS-50 coils
�4 4 1 1.4 7.8 50,
5 5 1 1.75 9.75 50'
�6 3 2 2.1 6.2 50,
8 4 2 2.8 9.2 50'
8 4 2 2.8 9.Q 50,
� 10 5 2 3.5 11.5 50'
TABLE 3
Hydraulic Layout
OS-100 coils
�2 2 1 1.4 4.6 50'
L 3 3 1 2.1 6.9
• : L 4 4 1 2.8 .2 0'
r r 5 5 1 3.5 1.5 0"a� ,
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TABLE 4 LICEN E51
Minimum Shoulder Lengths
05-50
. -
240 22.55
300 28 .,. . .. ....
360 33.5
480 44.5
600 55.5 11 a
The dimensions in Table 4 represent the minimum required I ngth of the outer
shoulder which include coils, spacing between coils, and sho Lders. These Lengths
can be extended to match site conditions. Minimum shoulde spacing and spacing
between coils is 6 inches. See illustration below for example ofioulder Length..
APR 0 12024
SON COUNTY ENV'RONMENTAL ypgtTH DJq
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TABLE 5
Minimum Shoulder Lengths
05-100
240 14' 2 inches
360 21' 4 inches
4P0 28' 4 inches
600 35' 5 inches
The dimensions in Table 5 represent the minimum required length of the shoulder
which include coils, spacing between coils, and shoulder. Th se lengths can be
extended to match site conditions. Minimum shoulder spacir(g is 6 inches. See
illustration below for example of shoulder length.
Basal Area:
The basal area is comprised of the total area where t e C-33 sand is
in contact with the receiving soil. The minimum required ba al area is ula
by dividing the design flow rate by the soil loading rate spec fied in W 46-
(local codes may have differing loading rates). M1wPT�i
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O' LICEN Ep DE IGN E E'9
Combining Hydraulic Layout and Basal Area Requirements
To combine the coil layout and the basal area, start th the coil layout.
Refer to Tables 4 or 5 for minimum shoulder lengths. Zero to 5 percent slopes
(0-5% slope) are considered flat for basal area calculations a d set back
considerations. It may be advisable to place the coils on the p side of the basal
area when the slope is 2 % or more. On flat sites, the coils s ould be placed in the
center of the basal area. The coils will be arranged in a sing line, although the
line can be curved to match site contours. Also, no emitter s all be placed within
6 inches of the C-33 sand media shoulder.
On sloping sites (>5 to 20% slope) the coils will be pla ed parallel to the
contour and one edge of the coils must be placed about 121 ches from the
upslope basal boundary. There must be at least 6 inches sep ration added between
the drip tubing in different OS-50 coils. With the OS•100 coi s the spacing is lb
already included with the 85 inch (7.1 foot) area. Side slope of the C-33 sand g
media is at least a 1 to 1 slope. Add the minimum coil 'enthl to the side slopes to
determine the minimum basal area length. Divide the total sal area square
footage by the minimum basal length to calculate the basal rea vndth.fiv "y
APR 0 12024
MASON OUNTY ENVIRONMENTAL HEALTH
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MASON COUNTY ENVIRONMENTAL HEALTH Lill c ED SIGNE ]/ m
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Basal area required = daily design flow -. soil loading rate
600 sq. ft. = 360 gpd a 0.6 gpd/ftZ
Minimum shoulder length (see Table 4) is 33.5 inches.
Minimum side slopes at 1 : 1 slope CD 18 inches (18 inches x 2) = 3 feet
Minimum basal area Length = shoulder length + side slopes APPROVED
33.5 feet + 3 feet = 36.5 feet APR V
Basal area width = required basal area = minimum basal lenllth 2024
600 sq. ft. a 36.5 feet = 16.43 feet or 165 feet MASON COUNttEAOyJAgyENTA( TR
Minimum basal area dimensions for soil type 4 = 36.5 feel Iona x 16.5 feet
wide.
Controller:
The LFSP-RF-AR control panel shall be used to operate the med dosing sequencing
of the OSCAR402.Timer settings for the OSC4R-XO2 are short and eryfrequent(3 minutes
off and 30 seconds on).The supply line needs to drain between do es,so the "on time" may
need to be increased to compensate for filling the supply line prior o each dose.
Set-backs, New construction:
Setback distance from property 10 feet 30 feet 10 feet
lines, other soil dispersal
components, driveways, (12-18 inches soil (18-24 inches soil
buildings, ditches or depth) depth)
interceptor drains, subsurface
storm water infiltration
systems, or any other
development which would either
impede water movement away
from the OSCAR or channel
groundwater to the OSCAR area
Setback distance from well, 100 feet 100 fee - 100 feet
suction line or surface water. 4�o- j p 1 t L.
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I The edge of required basal area �`v.W<.,I-; iF
cThe item is upgredient when liquid will flow away from it upon enco mi" "ta r restrictive layer.
SThe item is downgradient when liquid will flow toward it upon enc ring r bl strictive layer,
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Table 1-2—
Design Septic Aeration Clarifier' Pump Aerators Suggest tank sizes"
Flow
500 gpd 670 330 330 670 1 1,0 0 gal.treatment, 1,000 gal. discharge
760 gpd 1,000 500 1,000 500 2 1, 0 treatment, 1,500 discharge
1500 gpd 2,010 990 990 2,010 3 3.0 0 treatment, 3,D00 discharge
2000 gpd 2,660 1,320 1.320 2,660 4 3k k 1500 treatment&3k&1500 discharge
2250 gpd 3,000 1,500 1,500 3,000 5 3k 1500 treatment&3k&1500 discharge
3,000 gpd 4,000 2,000 2,000 4,000 6 use multiple tanks to meet volume needs
3,500 gpd 4,700 2,310 2,310 4,700 7 use multiple tanks to meet volume needs
"Minimum liquid volume needed."Local health jurisdictions may require larger tank v lumes. Ain pRo ViE )
'Table 1-2 is a quick reference guide.
�i Aerator: APR 0 12024
For each 500 gpd design flow one aerator will be nee ed. Roundup the ONMEN7At NEAtTM
design flow to the next 500 gpd value. For instance, a 600 gl id design flow will 'JA
need 2 aerators (600 gal. rounded up to 1000 gal. needs 2 ae rators).
At'tt The aerator box must be installed so that the bottom f the aerator box is
ahe same elevation or higher than the top of the tank rise,s, see Illustration 3.
If the site is sloped the aerator box can be buried, upslope fi om the tanks. The
sides of the aerator box lid must not be buried. Aerators can be installed up to
several hundred feet away from the diffusors. The line betw en aerator and
diffusors must slope toward diffusors.
Aesthetic concerns should be considered when placin the aerator b
Place the aerator away from house windows, doors, and are s where peo to
to congregate, such as patios areas and barbecues. sr
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Illustration 3
Headworks: HWN-.7-RF
'/4 inches Arkal disc filter, mesh, 130 micron
'/ inches Arad flow meter
Three oil filled pressure gauges (0.100 psi)
5 Netafim normally closed solenoid valves (Model 80)
APR 0 12024
MASON COUNTY ENVIRONMENTAL HEALTH
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OSCAR-X02 Parts list (500 gpd). LIC INDY ED IGx RNEN
Each 0SCAR-X02 unit will include: COMES III I.,
LF1 P-RF-AR or LF1 P-RF-ARA control panel
LOT-30, 1/2 hp, 120 volt pump
Hi-Blow Aerator, HB-80 (80 liter/minute)
Hi-Blow diffusers
OS-50 or OS-100 Coils
PVC fittings and drip tubing adapters
HWN-.7-RF automatic headworks
Solid 's inches poly tubing for connections
2 float switches
1
OSCAR-XOZ coil Connections
Manifolds and supply lines are 1 inches Sch 40 PVC
APPR()'Vr,
APR 012021
MASONCOU"ENVIROQENTAL HEg
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Manifold and blank tech line adapter and connection.
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Blank tech liner and Bioline connection with internal coupling
13�i�
Inspection ports.
Cap
sup cap Cap
ar Sup CA P
4- 4^PVC I pe
4--4^PVCPipe (LA1000V )
U..aspe Varies)
IN 4^ ang
Slap(4) 0 90•Apart
Talk Ring
d541-pVc
Tee
OSCAR Cover Options.
There may be a desire to cover the OSCAR with some hing additional to the
specified ASTM C-33 sand. The intent is not to have too muc i additional cover over
the final C-33 sand layer. Placing too much cover will inhibit plant root growth.
Because the C-33 sand is sub-surface irrigated, grass and otter ground cover will
grow rapidly, forming a firm protective cover over the OSCA Z. At the end of the
first growing season the C-33 sand layer will be as firm as na tive soil to walk on.
Options include:
• landscaping jute mat with grass seed or ground cover plantings /�
• a thin layer of mineral soil low in organic content (<10% oroanics) APp//����qq
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• Thin layer of crushed or washed rock for wind erosion Prot ction. ® 0/
• Thin layer of bark to wood chips.
MASON APR 0 12024
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Do Not Cover C-33 Sand with: OUNryENVIRONMENrAi
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• organic mix (manufactured top soil from com t)
• filter fabric
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LICEN9E0 DESIGN GNEFl`
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Installation Notes
Oscar-XO2 Treatment Sys
372 SE Mell Rd 32023-32-00
1. Installer responsible to contact designer prior to Ins I ation.
2. Installer responsible to submit installation form to de11,�ncl
gner with a plot map, tank
information, pump information any changes made toa design within two weeks
of final inspection by the Mason County Health Dept.
3. Stumps in the drainfield area must be cut down to gr level or below.
4. Oscar drainfield: ASTM C-33 sand media as per West ington Department of
Health's Recommended Standards and Guidance for r termittent and Filter.
5. The prepared site plan is not a survey. It's the owner's rei I onsibility to verify property
lines, utility lines (water, sewer, power, phone and gas) pi rto installation.
6. Minimum of 6" of sand throughout out the lateral(coll ires, must be level.
7. Oscar X02 parts list on Page 13
8. The tanks may be moved as necessary to accommodate ilding requirements.
9. Septic tank location must meet all required setbacks.
10. Keep wheeled vehicles off the drainfield area before, dur ng and after installation.
11.Tracked equipment only
12. ,All ground, surface water and roof drains must be diverts I away from the septic tanks
and drainfield.
13. Ensure the final grade slopes away from these areas anc water doesn't collect on or
around them. Use swales, berms, catch basin and tight lir as, curtain drains, etc. to divert
all waters
14. Curtain drains can be no closer than 10' upgradient and 3 down gradient of the
drainfield
15. Exposed restrictive layers, cuts, banks, etc, can be no clo r than 50' downhill from the
drainfield.
16. Install access risers on all tanks, valve box and ends of la a ale.
17. Make sure septic tank risers are epoxied or caulked to ca tin riser rings on tank.
16. Lids must form a water and gas tight seal with the access ers.
19. This system must be installed by a Mason County Certifie nstaller.
20. Deviation from this design without prior approval from the J signer and Mason County
Health Department will make this design null and void.
21. This design was sized per Washington Administrative Co a AC246-272A-0230. The
operating capacity is based on 45 gallons per day per cap t with two persons per
bedroom. The minimum design flow per bedroo er day the operating capacity of
ninety gallons multiplied by 1.33. This results himum esign flow of one hundred
twenty gallons per day. This creates a surge ctor 33 ut anticipated flow is ninety
gallons per bedroom per day. c
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System Owner Responsibili I s:
1. Owner or installer responsible for payment of installation permit prior to starting
install.
2. Operation and Maintenance is required by Washington Sae Department of Health and
Mason County Health Department.
3. The septic tank and pump tank should be pumped every hree to five years or as
needed.
4. System owners are responsible for having maintenance re onned annually.
5. System owners are responsible for responding to septic is Lies in a timely manner.
6. System owners shall not at any time change or alter satin a in the control box.
7. System owner agrees to read and abide by information re arding their system in the
User Manual provided by Mason County Public Health.
S. Keep the flow of sewage at or below the approved design c perating capacity.
9. Leaky plumbing can hydraulic overload your on-site septic ystem
10. Keep waste strength at residential waste strength parameto irs.
11. Spread loads of laundry through the week.
12. Do not use excessive bleach or detergents with added wit ners.
13. Do not shower, do laundry and dishwasher at the same ti
14.Antibiotics can kill or impair the biological process in the s tic tank.
OR
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