HomeMy WebLinkAboutSWG2024-00409 - SWG Application / Design - 10/7/2024 WA
MASON COUNTY 415N fi SHHELTON: , 0427-97 ,EXT 400
STREET,
SHELTON,
EXT 400
BELFAIR:360-2754 67,EXT 400
Public Health & Human Services ELMA:360-482-5289,EXT 400
FAX:360427-7767
On-Site Sewage System Permit: SWG2024-00409
APPLICANT JEFF JACKSON Phone:
Address: 5636 Renee Court SE OLYMPIA,WA 98512
OWNER JEFF JACKSON Phone:
Address: 5636 Renee Court SE OLYMPIA,WA 98512
SEPTIC DESIGNER CINDY WAITE• Phone: 360-701-0205
Address: 80 E Pickering Lane SHELTON,WA 985M
SEPTIC INSTALLER SCHOENING BRAYDEN Phone:
Address: P O BOX 181 SHELTON,WA 98584
Site Address: 60 N Hoodview PI
Primary Parcel Number: 324345000022
Permit Description: New 3bd gravity bed
Permit Submitted Date: 10107/2024
Permit Issued Date: 10122/2024
Issued By: Rhonda Thompson
Current Permit Fees Paid: $805.00 (additional roes may ea required upon matallabon or system).
Permit Expiration Date: 10117/2027 ISased on date or Inspedtont
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 bwMI 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/envimnmentaUonshelom-inspection-mquest.php or call:
360-427-9670, extension 400.
OFFICIAL USE ONLY
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October 10,2024 -----—
Jeff Jackson
5636 Renee Court SE
Olympia,Washington 98513
RE: Geotechnical Evaluation of On-Site Septic System
60 N Hood View,Lilliwaup,Washington.
Pamel 32434-50-OW22
To Whom It May Concern,
Envirotech Engineering (Envirotech) completed a site visit on October 9, 2024 to the property in order to
observe surface and subsurface conditions. This geotechnical evaluation addresses the proposed on-site
septic system with relation to landslide hazards on and near the property. Information collected from site
observations and field testing was completed by Michael Staten with Envirotech.
Subsurface conditions were visually classified as a shallow 4-foot layer of silty sand with gravel (SM)
overlying cemented glacial till soils. The septic drainfield area is near sloping grades of approximately
55%on the property descending to the west.
It is our opinion that the proposed septic system will not influence the nearby critical descending slopes
exceeding 40%, provided that vegetation remains undisturbed on the critical slopes and within a distance
of 5 feet from the top of slope. We believe that the proposed drainfield has a sufficient setback from the
top of critical slope,and will not contribute to future landslides.
If you have any questions or need any further assistance,please contact Michael Staten at 360-275-9374,
Sincerely,
Envirotech Engineering
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ccLL: 360-689-6045
DESIGN FOkM—PAGE ONE Assessor's Parcel Number: 3 2 4 3 4 — 5 0 — 0 0 0 2 2
A design will be reviewed when 3 co i of each of the following are submitted:
Completed design form that has been signed and dated. v 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.
This form men,be scanned and milable M 6
view on the Mason County Web site.Maximum a er size.: /I"X 17"
°r"p"'' L IDENTIFICATION
Permit Number. SWO zo2 H-0 tiog Designer's Name: CINDY WAITE
Applicant's Name: JEFF JACKSON Designer's Phone Number: 350-701-0205
Mailing Address: 5836 RENEE ART SE Designer's Address: 80 E PICKERING LINE
OLYMPIA WA 98512 SHELTON WA 9ee84
city state Zi Ci state Zip
•.'DESIGN PARAMElm
Treatment Device
O Glendon Biofilter ❑Sand Filter 0 Mound ❑Sand Lined Drainfield ❑ Recirculating Filter,Type:
❑Aerobic Unit Make/Model ❑Disinfection Unit Make Mo&I Other:
Drainfield Type
iii(Gravity, ❑ Pressure ❑Trench lii(Bed ❑ Sub Surface Drip
Septic Tank/Drainfield Specifications Laterals
Number of Bedrooms 3 Schedule/Class ASTM 2729
Daily Flow: Operating Capacity 270 gpd Length 45 ft
Daily Flow: Design Flow 360 gpd Diameter 4 in
Septic Tank Capacity(working) 1200 gal Number 3
Receiving Soil Type(1-6) 3 Separation 3
ft
Receiving Soil Appl.Rate .8 Rpd/ft: Orifices
Required Primary Area 450 ft' Total Number of Orifices ASTM 2729 PERF
Designed Primary Area 450 R' Diamete - in
Designed Reserve Area 450 ft' Spaci in
Trench/Bed Width 10 ft e rp Manifold
Trench/Bed Length 45 ft S
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Elevation Measurements n
Original Drainfield Area Slope >l -Y. tam , s
(0\ R; in
New Slope,If Altered % Ptr� c0 tion used? 0 Yes RfNo
Depth of Excavation UP-slope 24-29"(PAGE 4) in "ea am a ansport Pipe
from Original Grade Doxm-scope 2-4-1- I in Schedule/Class 3034
Designed Vertical Separation 36+ in Length 15 It
Diameter 4 in
Pump Required? ❑Yes RdNo Dosing aafd lbdlp CYaIN1ed E D
Pump/Siphon Specifications Number ofdows/day A r f_ RI!I V
Diff.in Elevation Between Pump&Uppermost Orifice ft Dose quantity OTT= gal
Drainfield Squirt Height/Selected Residual(head) _ft Chamber Capacity(II004 MN MINTY FNVIRONMFNTAL FOLTH
Uppermost Orifice 0 Higher O Lower than Pump Shutoff Pump controls: Please chock those requireRET
Capacity Q Total Pressure Head gpm OTimer DElapse Meter 0 Event Counter
Calculated Total Pressure Head it If Timer: Pump on ,Pump off
Comments
CONCRETE TANK REQUIRED, GRAVEL BASED DRAINFIELD REQUIRED
DE6itrN FORM-PAGE TWO Assessor's Parcel Number:3 2 4 3 4 - 5 0 — 0 0 0 2 2
Permit Number: SWG
DESIGN CHECKLISTS
Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch
111 Test hole locations III Dreinfield orientation and layout Reference depth from original grade:
Id Soil logs 11 Trench/bed dimensions and Ef Septic tank
III Property lines critical distances within layout 66 Dreinfield cover
fisting and proposed wells Ed D-Box/Velve box locations Reference depth from original grade
within 100 It of property Rf Septic tank/pump chamber and restrictive strata:
,Qteasumments to cuts, banks,and locations
surface water and critical areas III Observation port location Laterals,trench/bed,top and
bottom
�4Location and orientation of wean-out location
.� ❑ Curtain drain collector
curtain drain and all absorption 4AManifold placement ❑ Sand augmentation
components
Id � If Agrifrce placement Other cross-section detail:
Location and dimension Lateral placement with distance Observation ports/cleanouts
primary system and reserve area to edge of bed
10 Buildings Other Information
19 Direction of slope indicator 4kAudible/visual alarm referenced Yes No
m Waterlines Ed Scale of drawing shown on scale Ed ❑ Design staked out
bar ❑ ❑ Recorded Notices attached
Id Roads,easements,driveways, ❑ ❑ Waiver(s)attached
pearling ❑ ❑ Pump curve attached
III 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 nod ad by installer at time of installatiotv�l Yes ❑ No
Zc e�j ,0 � ,202-
Signe of Designer at
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:
ka � 1a1�Zlyrl
Environmental Health pecialist 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:
✓ Dreinfield site conditions have not been altered to adversely effect 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. 11/11
This form may be scanned and available for public view on the Mason County Web site.
Updated Date: 12/7/2015
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2. 1200 gallon septic tank
3. Primary drainfield o
4. Reserve drainfield
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6. Clean out
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OCT 22 2024
MASON COUNTY ENVIR0N'4ENTALHEA H `•, .».
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APPROVED
OCT 2 2 2024
MASON COUNTY ENVIRONMENTAL HEALTH
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Distribution Box(No Scale)
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LICENSED DESIGNER
EMIR IN M
1200 Gallon Double Compartment Septic Tank
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OUTLET FILTER
REQUIRED
Sewage from ;„ t
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SEPTIC TANK MUST BE ON DOH APPROVED LIST
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APPROVED awe �ti�
OCT 22 2024
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MASON COUNTY ENVIRONMENTAL HEALTH CINDD E WAITE '
RET LICENSED DESIGNER
Installation Notes
Gravity Distribution System:
60 n Hood View Place 32434-50-00022
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. Concrete septic tank required
3. Gravel based drainrield required
4. Install system during dry weather with acceptable soil conditions
5. Keep wheeled vehicles off the drainfield area before, during and after installation.
Tracked equipment only
6. 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.
7. Curtain drains can be no closer than 10' upgradient and 30' down gradient of the
drainfield
8. Exposed restrictive layers, cuts, banks, etc. can be no closer than 50' downhill from the
drainfield.
9. Install access risers on the septic tank, D-box and observation ports.
10. Make sure septic tank risers are epoxied or caulked to cast in riser rings on tank.
11. Lids must form a water and gas tight seal with the access risers
12. Install effluent filter at the septic tank outlet.
13. This system must be installed by a Mason County Certified Installer.
14. Deviation from this design without prior approval from the designer and Mason County
Health Department will make this design null and void.
15. 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.
16, Install laterals or bed with contour of the ground
17. Install trench bottoms level and always maintain a minimum of six inches into native soil
18. Filter fabric required over drain rock prior to backfilling. If the drain ock extends
above the original grade, run the filter fabric at least 2 inches do a trench wall.
APPROVED
ED s p�
Ocl 22 2024 . 510 Nis
l
L'CEN EDDESIONEa ;
WASON COUNTY ENREj Ngti%NFAIiN
System Owner Responsibilities:
1. Operation and Maintenance is required by Washington State Department of Health and
Mason County Health Department.
2. The septic tank should be pumped every three to five years or as needed.
3. System owners are responsible for having maintenance performed every three years as
per WAC246-272A.
4. System owners are responsible for responding to septic issues in a timely manner.
5. System owner agrees to read and abide by information regarding their system in the
User Manual provided by Mason County Public Health.
6. Keep the flow of sewage at or below the approved design operating capacity.
7. Keep waste strength at residential waste strength parameters.
6. Spread loads of laundry through the week.
9. Do not use excessive bleach or detergents with added whiteners.
10. Do not shower, do laundry and dishwasher at the same time
11. Antibiotics can kill or impair the biological process in the septic tank.
12. Leaky plumbing can hydraulic overload your on-site septic system.
( N WAITDESIGNER
4CENSEO DESIGNEE
APPROVED Ea°IaLs Uv,v
OCT 22 2024
MASON COUNTY ENVIRONMENTAL HEALTH
RET