HomeMy WebLinkAboutSWG2024-00473 - SWG Application / Design - 12/20/2024 MASON COUNTY 415N6 H ELTON: 60427O70,EXT 400
H STREET,
,SHELT ON, EXT584
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BELFAIR:360-275-0467,EXT400
Public Health & Human Services ELMA:360482-5269,EXT 400
FAX:360A27-7787
On-Site Sewage System Permit: SWG2024-00473
APPLICANT PORT OF SHELTON Phone: (360)426-1151
Address: 21 W SANDERSON WAY SHELTON, WA 98584
OWNER PORT OF SHELTON Phone: (360)426-1151
Address: 21 W SANDERSON WAY SHELTON, WA 98584
SEPTIC DESIGNER CINDY WAITE• Phone: 360-701-0205
Address: 80 E PICKERING LANE SHELTON,WA 98584
SEPTIC INSTALLER TBD Phone:
Address: 123 XXX XX, XX.00000
Site Address: 460 W Enterprise Rd
Primary Parcel Number: 420110060000
Permit Description: Commercial Sand Lined Bed 725 GPD
Permit Submitted Date: 12120/2024
Permit Issued Date: 02/1212025
Issued By: Jeff wilmoth
Current Permit Fees Paid: $1,425.00 (addiuonal rem may oe mquIw upon insmllafion or syamm).
Permit Expiration Date: 02/10/2028 (eamdondmaminapixtn)
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 downs/ope 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 Asbu/lt Form, Record Drawing, and Installation fee must be submitted for
final installation approval.
THIS PERMIT MUST BE ONSITE DURING INSTALLATION OF US&
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/onsitaloss-inspection-request.php or call:
360.427-9670,extension 400.
DESK.N FORM-PAGE ONE Assessor's Parcel Number. 4 2 0 1 1 - 0 0 - 6 0 0 0 0
A design will be reviewed when 3 come S of each of the following are submitted:
•Completed design form that has been signed and dated. I Scaled layout sketch,including all applicable items on checklist
•Scaled plot plan,including all applicable items on checklist. I Cross-section sketch,including all applicable items on checklist.
Tlds form may be scanted and avaYable for public viva nt the Mason C.auray Web ske.Maximum paper size: 11"X 17•'
IFICATION
Pant Nmdha: swG 2p 9,`t— 0� 75 Designer's Name: CINDY WAITE
Applicant's Name: PORT OF SHELTON Designer's Phone Number: 360-701-0205
Mailing Address: 21 W SANDERSON WAY Designer's Address: 80 E PICKERING LANE
SHELTON WA 98594 SHELTON WA 98584
City State Zip city State zip
su%f DESIGN PARAMETERS
Treatment Device
❑Glendon Rio6lter ❑Sand Filter ❑Mound 9 Sand Lined Drainfield ❑ Recirculating Filter,Type:
Cl Aerobic Unit Make/Model ❑Disinfection Unit Make/Model Other:
Drainfield Type
❑Gravity ❑Pressure ❑Trench Rf Bed O Sub Surface Drip
Septic Tank/Drainfield Specifications Laterals
Number of Bedrooms 50 EMPLOYEES Schedule/Class SCHEDULE40
Daily Flow.Operating Capacity 544 gpd Length 41.5 ft
Daily Flow: Design Flaw 725 gpd Diameter 1.25 in
Septic Tank Capacity(working) 2250 gal Number 8
Receiving Soil Type(1-6) 1 Separation 2 ft
Receiving Soil Appl.Rate 1. gpd/ft' PP t mar
Required Primary Area "�} fY Total Number o, '(' 188
Designed Primary Area 3 6 7'25� ftz Diameter - J 'h 3I16 in
Designed Reserve Area 900 ft'- SpacinB cw 5t nnE %. 24 in
Trench/Bed Width 10 ft u 0 Esi
Tmnch/Bed Length 83 R Schedule/Class eurvu a.+o' SCHEDULE 40
Elevation Measurements Length 2-3 ft
Original Drainfield Area Slope 0 % Diameter 2 in
New Slope,If Altered % Preferred manifold configuration used? O Yes O No
Depthof Excavation up-smco oaroeorrVEoraxvo in Transport Pipe
from Original Grade Doun.9opc wroemrouor sAw in Schedule/Class SCHEOULE40
Designed Vertical Separation 36 in Length 20 If
Gra e0-==rhami+e R r' v 1 rt r sr o 2 in
4.
Pump Required? If Yes Ell No F g ) g and Pump Chamber
Pump/Siphon Specifications drd .;;?,lose 12
Diff.in Elevation Between Pump&Uppermost Orift&SOftL#T 6p696.4•,hmwy-1 - 46 gal
Drainfield Squirt Height/Selected Residual(head) 2 0 �yGBAKr Capacity(Flood) 1896 gal
Uppermost Orifice d Higher O Lower than Pump Shutoff Pump controls:Please check those required.
Capacity @ Total Pressure Head 99.12 gpm fifturner GifElapse Meter Event Counter
Calculated Total Pressure Head 14.84 ft If Timer: Pump on ,Pump off
Commevts
SEE NOTES ON PAGE PAGE 12,PUMP CONTROLS TO BE SET AT TIME OF INSTALLATION
DESIGN FORM—PAGE TWO Assessor's Parcel Number.4 2 0 1 1 — 0 0 — li 0 0 0 0
Permit Number: SWG
DESIGN CHECKLISTS
Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch
Test hole locations V Drainfield orientation and layout Reference depth from original grade:
Soil logs Q} Trench/bed dimensions and W Septic tank
❑ Property Iines5-?5'ZA41C7 critical distances within layout Er Drainfield cover
-existing and proposed wells W D-Box/Valve box locations Reference depth from original grade
within 100 ft of property ❑ Septic tank/pump chamber and restrictive strata:
l!"easurements to cuts,banks,and locations 'P/rf m M fsp Y 0r Laterals,trench/bed,top and
surface water and critical areas EY Observation port location bottom
Location and orientation of {1"Clean-out location ❑J Curtain drain collector
curtain drain and all absorption 3"Manifold placement RI Sand augmentation
components 133 Orifice placement Other cross-section detail:
Location and dimension of p"Lateral placement with distance Or Observation ports/clean-outs
primary system and reserve area to edge of bed
Other Infor
,14 Buildings mafion
Audible/visual alarm referenced Yes No
;CK Direction of slope indicator✓.mQ Scale of shown on scale
/ g +� ❑ Design staked out
Waterlines ' bar yq �y j �a ❑ ❑ Recorded Notices attached
E� Roads,easements,driveways, i�' ROVE V Y D
❑ ❑ Waiver(s)attached
parking 1 � ❑ Pump curve allached
North arrow and scale drawing . Ftd 12 ❑ ❑ Evaluation of failure
shown on scale bar ASON COUNTY ENVIRONMENTAL HEALTH Non-residential justification
JBW ❑ ❑ Waste strength
❑ ❑ Flow
DESIGN APPROVAL
The undersigned designer must be notified //
d by installer at time of installation ® Yes ❑ No
C � (,-"led't, i ldl12ezy
Signat�ur of Designer ate
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:
En i tal Health Specialist Date
CAUTION: DESIGN APP OVAL IS VALID ONLY UNDER THE FOLLOWING CONDITION:
✓ The design is stamped"Approved"by Mason County Public Health. �y
✓ The Onsite Sewage Permit has not expired,the Permit Expiration Dare is: Z T b~ a lS
✓ Drainfield site conditions have not been abered to adversely affect conditions ofdesign 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.
Updated Date: l2/U2015
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1. Proposed building
2. Audio/visual alarm
3. Clean out
4. 2250 traffic rated septic tank
5. 1800 traffic rated pump tank Ic'IT
6. Transoport line to be cased
7. 10'x83' sand augmented primary
drainfleld s
8. Reserve drainrield
9. Waterline
/o. Valve box
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TABLE 4-6
TYPICAL WASTEWATER FLOWS FROM COMMERCIAL SOURCES (18)
Wastewater Flow
Source Unit Sam Typical
gpd/unit
Airport Passenger 2.1 - 4.0 2.6
Automobile Service Station Vehicle Served 7.9 - 13.2 10.6
Employee 9.2 - 15.8 13.2
Bar Customer 1.3 - 5.3 2.1
Employee 10.6 - 15.8 13.2
Hotel Guest 39.6 - 58.0 50.1
Employee 7.9 - 13.2 10.6
Industrial Building Employee 7.9 - 17.2 14.
(excluding industry and
cafeteria)
Laundry (self-service) Machine 476 - 686 580
Wash 47.5 - 52.8 50.1
Motel Person 23.8 - 39.6 31.7
Motel with Kitchen Person 50.2 - 58.1 52.8
Office Employee 7.9 - 17.2 14.5
Restaurant Meal 2.1 - 4.0 2.6
Rooming House Resident 23.8 - 50.1 39.6
Store, Department Toilet room 423 - 634 528
Employee 7.9 - 13.2 10.6
Shopping Center Parking Space 0.5 - 2.1 1.1
Employee 7.9 - 13.2 10.6
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ORIFICE SPACING 2
Lateral# Length Length Orifice # Distance from Distance from end Length#
# (Feet) (Inches) Spacing" Orifices feeder line of end of lateral
1 43.5 522 24 21 1.5 2 43.5
2 43.5 522 24 21 1.5 2 43.5
3 43.5 522 24 21 1.5 2 43.5
4 43.5 522 24 21 1.5 2 43.5
5 43.5 522 24 21 1.5 2 43.5
6 43.5 522 24 21 1.5 2 43.5
71 43.51 522 24 21 1.5 2 43.5
8 43.5 522 24 21 1.5 2 43.5
348 168 334
TRANSLENGTH
GPM
K (2"SCHEDULEN 40 `< 234.5
FRICTION LOSS 2.8436503
Squirt 2
Elevation difference 10
TOH 14.84365
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Installation Notes
Sand Augmented Pressure Distribution System:
4201100-60000 460 W Enterprise Rd
1. 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.
2. Septic and pump tank to be traffic rated
3. Pump controls to be set at time of installation
4. Install system during dry weather with acceptable soil conditions
5. Gravel based drainfield required.
6. Clean coarse sand to be used.
7. Install 30 mil liner down 6" into sand layer
8. Transport line to be cased
9. The tanks may be moved as necessary to accommodate building requirements. Septic
tank location must meet all required setbacks.
10. Keep wheeled vehicles off the drainfield area before, during and after installation.
Tracked equipment only,
11.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.
12. Curtain drains can be no closer than 10' upgradient and 30' down gradient of the
drainfield
13. Exposed restrictive layers, cuts, banks, etc. can be no closer than 50' downhill from the
drainfield.
14. Install access risers on the septic tanks, valve box and ends of laterals.
15. Make sure septic tank risers are epoxied or caulked to cast in riser rings on tank.
16. Lids must form a water and gas tight seal with the access risers
17. Install effluent filter specified in this design at the septic tank outlet.
18.This system must be installed by a Mason County Certified installer.
19. Deviation from this design without prior approval from the designer and Mason County
Health Department will make this design null and void.
20. 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 per
bedroom. The minimum design flow per bedroom per day is the operating capacity of
ninety gallons multiplied by 1.33. This results in a minimum design flow of one hundred
twenty gallons per day. This creates a surge factor of 33% but anticipated flow is ninety
gallons per bedroom per day.
21. Install laterals with contour of the ground
22. Install trench bottoms level and always maintain a minimum inches into native soil
23, Install locator tape on top of all drainfield laterals.
24. Install threaded clean outs at t e o aterals (cap at d to within six
inches of finis do shown
25. Install audio/vi I Mart
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26. 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.
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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.
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