HomeMy WebLinkAboutSWG2023-00387 - SWG Application / Design - 9/13/2023 (2) ® MASON COUNTY 415 NfiSHELTON ,SHELTO70,EAT 4W
SHELFAIR 360.27 - ]0,EAT 4W
BELFAIR:380-2]5-04fi].EXT/00
Public Health & Human Services ELM,360482-5269,EAT 400
FAX:360 27-7787
On-Site Sewage System Permit: SWG2023-00387
APPLICANT COWAN SALLY G Phone: 206-369-6361
Address: 6009 S 298TH PLACE AUBURN,WA 98001
OWNER COWAN SALLY Phone: 206-369-6361
Address: 6009 S 298TH PLACE AUBURN,WA 98001
SEPTIC DESIGNER CINDY WAITS-Septic Designer Phone: 360-701-0205
Address: 80 E PICKERING LANE SHELTON,WA 98584
Site Address: 30 N Hidden Cove Ln
Primary Parcel Number: 324242200080
Permit Description: Revised 3-bedroom OSCAR X02 system wl OS50 coils: Repair
Permit Submitted Date: 09113/2023
Permit Issued Date: 10123/2023
Issued By: David Anderson
Current Permit Fees Paid: $945.00 (.dmmml I...on,b.w.lnm�o.nnn.noxnix.ymm).
Permit Expiration Date: 0911912024 (based on OW of Inexwon)
Permit Conditions:
1 Proposed development subject to zoning requirements and approval by the planning
department staffper 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 Masan CountyAsbuilt 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.govihealth/environmentagonsita/oss-inspection-request.php or call:
360-427-9670,extension 400.
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6009 S 298TH PLACE AUBURN WA 98001 m
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30 N HIDDEN COVE LANE LILLIWAUP WA 98555
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CINDY WAITE 360-701-0205 V
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THI FORM MAY BE SCANNED AND AVNUBLE FOR PUBLIC WEIR ON THE MASON COUNTY WEBS;TE a-t vlJ DE+a
DESIGN FORM—PACE ONE Assessor's Parcel Number-7-2 y?y-- 2 2 -- o e a_ea
A resign 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 stemmed and available for public view on the Mason County Web sea.Muxinrwn Do er size: 1/"X 17"
PARCEL IDENTIFICATION
Permit Number: SWG ?7 Designer's Name: CINDY WAITE
Applicant's Name: SALLY COWAN Designer's Phone Number: 360-701-0205
Mailing Address: 8009 S 288TH PLACE Designer's Address: 80 E PICKERING LANE
AUBURN WA 98001 SHELTON WA 98584
Ci State Zip CI State 2i
DESIGN PARAMETERS
Treatment Device
❑Glendon Biofilter ❑Send Filter O Moved ❑Sand Lined Drainteld ❑Recirculating Filter,Type:
ff/Aerobic Unit Make/Model X02 ❑ Disinfection Unit Make/Model Other: OSCAR COILS
Drainfreld Type
❑Gravity ❑ Pressure ❑Trench ❑ Bed Till Surface Drip
Septic Tank/Drainfield Specifications Laterals
Number of Bedrooms 3 Schedule/Class NETAFIM
Daily Flow:Operating Capacity 270 gpd Length 50
ft
Daily Flow: Design Flow 0 360—
gpd Diameter 60X60
�p7��mm in
Septic Tank Capacity(working" o gar Number 3 W/2 COILS PER LAT
Receiving Soil Type(1-6) / Separation ♦.5 ft
Receiving Soil Appl.Rate /. - gpd/ft Orifices
Requited Primary Area 360 ft' To u cr of Orifices 50X6=300
Designed Primary Area 368 ftr eterM .Q,(/ EMITTER in
Designed Reserve Area 360 t v s a (jr+
ft 12 in
Trench/Bed Width 11 ft
� n,pNl n
Trench/Bed Length 33.5 g S hit t4 SCs \ SCHEDULE 40
Elevation Measurements QYJ�JhpEsacNa fi0'SUPPLY 80 RETURN ft
Original Drainfreld Area Slope 5-6 a 1 in
New Slope, If Altered /o Preferred manifold configuration used? O Yes ❑No
Depth of Excavation up-slope 0 in Transport Pipe
from Original Grade Dewnsl c
oP 0 in Schedule/Class
Designed Vertical Separation 4t12 in Length ft
Gravelless Chambers Required? ❑ Yes O No O Optional Diameter in
Pump Required? Rf Yes []No Dosing and Pump Chamber \\��
Pump/Siphon Specifications Number of doses/day 411
Diff,in Elevation Between Pump& Uppermost Orifice 10 ft Dose quantity .66 gal
Drainfreld Squirt Height/Selected Residual(head) —ft Chamber Capacity(Flood) 1200 gal
Uppermost Orifice Of Higher ❑ Lower than Pump Shutoff Pump controls: Please check those required.
Capacity @ Total Pressure Head glum liftimer G(Elapse Meter ❑ Event Counter
Calculated Total Pressure Mead R I If Timer: Pump on 30 sec , p
Pum off 3 MIN
Comments
CONCRETE TRAFFIC RATED TANKS REQUIRED, FOLLOW INSTALL X02 MANUAL, FLOW TO SE
SET AT 270GPD
DESIGN FORM—PAGE TWO Assessor's Parcel Number:.3-?
Permit Number: SWG
DESIGN CHECKLISTS
Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch
fid Test hole locations 69 Dminfield orientation and layout Reference depth from original grade:
Id Soil logs Rf Trench/bed dimensions and Ed Septic tank
m Properly lines critical distances within layout 7 Drainfield cover
m Existing and proposed wells D-Box/Valve box locations Reference depth from original rade
within 100 R of property Septic tank/pump chamber eg
and restrictive strata:
Measurements to cuts, banks,and locations p t .� ro ^V 19 Laterals,trench/bed,top and
surface water and critical areas 6i! Observation port location bottom
m Location and orientation of ®lklean-out location ❑ Curtain drain collector
curtain drain and all absorption Ed Manifold placement ❑ Sand augmentation
components 0 Orifice placement Other cross-section detail:
m Location and dimension of primary system and reserve area RI Lateral placement with distance ❑ Observation ports/clean-outs
m
to edge of bed Buildings Other Information
Audible/visual alarm referenced Yes No
66 Direction of slope indicator 1.1 le
fits Scale of drawing shownn a
on scale R1 ❑ Design staked out
It Waterlines bar ❑ ❑ Recorded Notices attached
Id Roads,easements,driveways, ❑ ❑ Waiver(s)attached
parking ❑ 0 Pump curve attached
Ice North arrow and scale drawing ❑ ❑ Evaluation of failure
shown on scale bar Non-residential justification
❑ ❑ Waste strength
❑ ❑ Flow
DESIGN APPROVAL
The undersigned designer must be notift ISinstall at time of installation 11 Yes ❑ No
Signature SPO esigner Date AR/�
The undersigned has reviewed this design on behalf of Mason County Public Health and deterrminV Q
compliance with state and local on-site regulations:
�l/9/To 2 #ASo"`O0Nry UG�91p1y o
Environmental Health Specialist Date .",vo,
D�q MFNTq�Hp
CAUTION: DESIGN APPROVAL IS VALID ONLY UNDER THE FOLLOWING CONDITIONiA/Ty
✓ The design is stamped"Approved"by Mason County Public Health.✓ The Onsite Sewage Permit has not expired,the Permit Expiration Date is: �/�y/ZO 7 n\\\
✓ Drainfield site conditions have not been altered to adversely affect conditions of design approval. - V
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.
Updated Date: 12P7/2015
1. Residence A pp
2. Audio/visual alarm "1
3. Clean out O V�
5. Traffic rated4. Traffic d 1200 1200 galllllon X02 lon pump tank treatment tank MASOp�oUNA N1 191024
6. 1" supply and return line DJ4 ON,
7. Primary drainfield
8. Reserve drainfield
9. Water line
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TABLE 2
Hydraulic Layout
S- s
Is
110
4 4 1 1.4 7.8 50'
5 5 1 1.75 9.75 50'
.2 50'
8 4 2 2.8 9.2 50'
8 4 2 2.8 9.2 50'
5 2 3.5 11.5 50'
TABLE 3
Hydraulic Layout
® • � coils
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2 2 1 1.4 4.6 50'
03 3 1 2.1 6.9 50'
4 4 1 2.8 9.2 0'
5 5 1 3.5 11.5
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TABLE 4
Minimum Shoulder Lengths LICENSEo DESIGN R
Feet Mum Shoulder Length in
240 22.5
300 28
360 33.5
480 44.5
600 55.5
The dimensions in Table 4 represent the minimum required length of the outer
shoulder which include coils, spacing between coils, and shoulders. These lengths
can be extended to match site conditions. Minimum shoulder spacing and spacing y
between coils is 6 inches. See illustration below for example of shoulder length.
or be connected together below the liquid level. The combined pump chambers
must be connected below the liquid level.
Table 1-2"`
Design Septic Aeration Clarifier Pump Aerators Suggest tank sizes"
Flow
500 gpd 670 330 330 670 1 1,000 gal.treatment, 1,000 gal.discharge
750 gpd 1,000 5o0 1,000 500 2 1,600 treatment, 1,500 discharge
1500 gpd 2,010 990 990 2,010 3 3,000 treatment,3,000 discharge
2000 gpd 2,680 1,320 1,320 2,680 4 3k& 1500 treatment&31k&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. -I*OAA
"Local health jurisdictions may require larger tank volumes.
'Aerator' 2 1s a quick reference guide. �QS�N�opN4FUG�,91p1y
70 O
design flow to the nexFor each 500 t500 gpd design fva ulow e Foraeratorn instance, a 600 gpd needed.esloign flow up wi�✓� N,1,FNr�y�pH
need 2 aerators (600 gal. rounded up to 1000 gal. needs 2 aerators).
The aerator box must be installed so that the bottom of the aerator box is
at the same elevation or higher than the top of the tank risers, see Illustration 3.
If the site is sloped the aerator box can be buried, upslope from 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 between aerator and
diffusors must slope toward diffusors.
Aesthetic concerns should be considered when placing the aerator box.
Place the aerator away from house windows, doors, and areas where people tend
to congregate, such as patios areas
and barbecues.
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Ill CICf ED DESIGNER �\
k%H,H45 OSiO�
,9pp
ygsoNC Nry9FNU`C�R 19OGA bedroom esig120dx7) s40gd
40 4P Ogpd ( or i8 ��4 oN�FNrq�
Minimum tank size for 840 gpd - 1,000 gal. x 1.68 . 1, 0 gallons HFglTH
Therefore, a 1750 gallon, two compartment tank c used.
P �
For Wks with waterst o i QW?. he
treatment tank and discharge tank a double compartmen file
can be used (no flow through ports). Flip the discharge t frod
compartment is first as shown (see Illustration 2). The ier w i
remain full LICE" ve
oo a
Exvmts Dora 1 \v
1
Illustra iof n klkl K' /2-0I GG C0 A)crk
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A e daily design flow rates increase, larger tanks will be may
become nec ary to have individual tanks for each chamber combination of
tanks to meet t volume requirements. For example:
Septic hamb r = 4000 gal. ed, use a 3000 gal. tank + 1000 gal. tank.
Aeration Chamber = 2.1 gal. t
Clarifier chamber 000 gal. tanks.
a 0 gal. tank + 1000 gal. k.
In this ample, the septic chambers could be tonne d using standard tee
baffles ng a two compartment chamber. The aerator cham could be
arra d the same as the septic chambers. Half of the diffusors wo be placed in
e 1,000 aeration chamber. The clarifier chambers could either use to ffles
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N�90rory f ��91p1y O
Ilia ach OSCAR-X02 unit will include: 014 N�FNr41t4jp1t
LF1P-RF-ARA control panel
LOT-30, 1/2 hp, 120 volt pump
' Hi-Blow Aerator, HB-80 (80liter/minute)
' Hi-Blow diffusers
OS-50 or OS-100 Coils
PVC fittings and drip tubing adapters
• HWN-.7-RF automatic headworks
Solid % inches poly tubing for connections
2 float switches
OSCAR-XO2+1 Parts list (501-1,000 gpd). e
P
Each OSCAR-X02+1 unit will include:
LF1P-RF-ARA control panel
LOT-30, 1/2 hp, 120 volt pump g 01N Si
Hi-BlowAerator2 (2), XB-80 (80 liter/minute)
E 6S,RITE pgEq�
• Hi-Blow diffusers (4) `2oti
OS-50 or OS-100 Coils " ' "'"
PVC fittings and drip tubing adapters
' HWN-.7-RF automatic headworks
Solid ,A inches poly tubing for connections
' 2 float switches
Inspection ports. A~p
4%0 a�/I rjvR��Fp
ti0°UNry 81014
x _erg 'type Cop q NT,y
hum Type Vq
Br Rho�ap or!Slip C'ep `4844,1//
¢ _.C" P%c Pipe
lir PVE Pif* ILNapt6 r'RFicAl
(Lf?ai{5l��iFlssl
IN 141, Long _
o J�e1 'Jr18 s"
( E WARE y
LICEE NSED DESIGNER
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OSCAR Cover Options. a
There may be a desire to cover the OSCAR with something additional to the
specified ASTM C-33 sand. The intent is not to have too much additional cover over
the final C-33 sand layer that would prevent the sand from accessing oxygen from
the atmosphere. Placing too much cover will inhibit plant root growth. Because
the C-33 sand is sub-surface irrigated, grass and other ground cover will grow
rapidly, forming a firm protective cover over the OSCAR. At the end of the first
growing season the C-33 sand layer will be as firm as native 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 (00% organics)
• Thin layer of crushed or washed rock for wind erosion protection.
• Thin layer of bark to wood chips.
• Aggregates the size of rip-rap (5-6 inch diameter) can be 'placed" on the OSCAR
for protection from deer or elk traffic. These larger sized aggregates must be
placed, not dropped, on the OSCAR to prevent breakage of piping and other
materials.
• Wire mess can be installed over the sand to prevent erosion and allow for grass
to grow.
Do Not Cover C-33 Sand with:
• organic mix (manufactured top soil from compost)
• filter fabric �\��
Installation Notes �AA�j
Oscar-XO2 Treatment System SON00 , V/, O��O
30 N Hidden Cove Lane 32424-22-00080 Nry��RON�F?��44`
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1. This is a failure found by the Mason County Health Department. Underground stream
appears to be running through drainfield area picking up sewage.
2. 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.
3. Installer responsible to contact designer prior to installation.
4. Installer responsible to submit installation form to designer with a plot map, tank
information, pump information any changes made to the design within two weeks of
final inspection by the Mason County Health Dept.
5. Oscar drainfield: ASTM C-33 sand media as per Washington Department of Health's
Recommended Standards and Guidance for Intermittent Sand Filter.
6. Traffic rated concrete tanks required for treatment and pump tank.
7. Minimum of 6" of sand throughout out the lateral(coil) area, must be level.
B. Oscar X02 parts list on Page 8
9. Controls to be set per X02 guidelines
10. Septic tank location must meet all required setbacks.
11. Keep wheeled vehicles off the drainfield area before, during and after installation.
12.Tracked equipment only
13, ,All ground, surface water and roof drains must be diverted away from the septic tanks and
drainfield.
14, 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
15, Curtain drains can be no closer than 10' upgradient and 30' down gradient of the drainfield
16. Exposed restrictive layers, cuts, banks, etc. can be no closer than 50' downhill from the
drainfield.
17. Install access risers on all tanks, valve box and ends of laterals.
18, Make sure septic tank risers are epoxied or caulked to cast in riser rings on tank.
19. Lids must form a water and gas tight seal with the access risers.
20. This system must be installed by a Mason County Certified installer.
21. Deviation from this design without prior approval from the designer and Mason County
Health Department will make this design null and void.
22.This design was sized per Washington Administrative deWAC246-272A-0230. The
operating capacity is based on 45 gallons per day per its with two persons per
bedroom. The minimum design flow per bedroom p a the operating capacity of
ninety gallons multiplied by 1.33. This results in a u sign flow of one hundred
twenty gallons per day. This creates a surge fact anticipated flow is ninety
gallons per bedroom per day.
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System Owner Responsibilities:
1. Owner or installer responsible for payment of installation permit prior to starting
install.
2. Operation and Maintenance is required by Washington State Department of Health and
Mason County Health Department.
3. The septic tank and pump tank should be pumped every three to five years or as
needed.
4. System owners are responsible for having maintenance performed annually.
5. 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.
7. System owner agrees to read and abide by information regarding their system in the
User Manual provided by Mason County Public Health.
9. Keep the flow of sewage at or below the approved design operating capacity.
9. Leaky plumbing can hydraulic overload your on-site septic system
10. Keep waste strength at residential waste strength parameters.
11. Spread loads of laundry through the week.
12. Do not use excessive bleach or detergents with added whiteners.
13. Do not shower, do laundry and dishwasher at the same time
14. Antibiotics can kill or impair the biological process in the septic tank.
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