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HomeMy WebLinkAboutSWG2025-00147 - SWG Application / Design - 5/12/2025 MASON COUNTY 415 N 6TH STREET,SHELTON,WA 98584 A 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: SWG2025-00147 APPLICANT DIBENEDETTO VANESSA M Phone: 847-212-7019 Address: 7639 191ST AVE SW ROCHESTER, WA 98579 OWNER DIBENEDETTO VANESSA M Phone: 847-212-7019 Address: 7639 191ST AVE SW ROCHESTER, WA 98579 SEPTIC DESIGNER PAULA JOHNSON* Phone: 360-898-2255 Address: 171 E VUECREST DRIVE UNION, WA 98592 Site Address: 131 SE Alder Rd Primary Parcel Number: 320285001901 Permit Description: Repair(non-conforming): 3-bedroom pressure system Permit Submitted Date: 04/22/2025 Permit Issued Date: 05/12/2025 Issued By: David Anderson Current Permit Fees Paid: $825.00 (additional fees may be required upon installation of system). Permit Expiration Date: 05/07/2026 (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 Non-conforming septic repair. The septic system may need to be brought into full compliance before future permits can be approved. Detail: The existing pressure system has less than 24 inches but at least 12 inches of vertical separation between the bottom of the distribution area and a restrictive layer. 7 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/onsiteloss-inspection-request.php or call: 360-427-9670, extension 400. OFFICIAL USE ONLY —M• ASON COUNTY DATE RECEIVED: U I(' / zz z +U I / (If 0 D lileti, ., C V7 AMOUNT RECEIVE RECENED 3Y•=_-- Public Health & Human Services0 �Zrj CO Environmental Health 360-427-9670,ezt.400 or 360-275-4467,ext.400 /� 415 N.6th Street- Shelton,WA 96584 S VVG i%�{_ Ol/1 !,z L17 fnON-SITE SEWAGE SYSTEM APPLICATION 7 m m ,;PPL!GP.NT ?HONE Vanessa DiBenedetto %� (847)212-7019 CU Z MAILING ADDRESS-STREET,CITY STATE ZIP CODE 7- g CD co 7639 191st Ave SW �0 h ' • hester WA 98579 SITEADDRESS-STREET CITY.ZIP CODE �/�• - I Q� 131 SE Alder Rd (1 1�' Kelton WA 98584 I w NAME OF DESIGNERO PHONE I N Arrow Septic Designs, In (360) 898-2255 0 wi NAME OF INSTALLER PHONE 0_ ` I CD N I N) PERMIT TYPE(select one) ;; DRINKINGIN WATER SOURCE i RESIDENTIAL OSS 9 COMMUNITY OSS f COMMERCIAL OSS l PRIVATE INDIVIDUAL WELL 5 PRIVATE TWO-PARTY WELL Z I TYPE OF SSDRK(select one) i i PUBLIC WATER SYSTEM , E NEW CONSTRUCTION/UPGRADES ii.REPAIR I REPLACEMENT OTHER DETAILS(select an that apply) 0 TABLE X REPAIR I SUB CI CISURFACING SEWAGE RI EXISTING FAILURE 0 SHORELINE 03 Ii.IDESIGN FORM(REQUIRED) iaSEPTIC DESIGN(REQUIRED) BEDROOMS LOT SZE WAS LOT CREATED AFTER 4/12025/ B I O EWAIVER(S)(IF APPLICABLE) 3 BR 1 1.08 ac ❑ YES p NO I I 00 DIRECTIONS TO SITE AND SITE CONDITIONS (av icckedgate) Head E on W Alder St toward N 6th St. At the traffic circle, take the 1st exit. Turn (L) onto E ' I Arcadia Ave. Turn (L) onto SE Alder Rd. Destination on (L). "Denny" on mailbox on (L). o I co -I Ico I SITE MUST BE FLAGGED FROM MAIN ROAD AND TEST HOLES MUST BE FLAGGED WITH TEST HOLE NUMBERS. I OFFICIAL USE ONLY BELOW THIS LINE UPGRADE/FAILURE SOURCE(tor reporting purposes) r. 0 VOLUNTARY 0 MAINTENANCE/PUMPING 0 BUILDING PERMIT 0 HOME SALE ❑COMPLAINT ❑OTHER: INSPECTOR SOIL LOGS COMMENTS;CONDITIONS 7n: 0- (5' l FS is-t3•' S:L Rai of VI w/ fell cvOi f�3 - ?O 5c�(Ty1cs) iiI+ utza` ‘.r ine ff All VIA i IT Z3 Gcrs 14st at 3- 1 0 I SOIL CODES: RECORD DRAWNG AND INSTALLATION REPORT 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 (k" 5/S/ is- 5/ -7(7976' 0,,--------N057(7 ' 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: 3 2 0 2 8 — 5 0 — 0 1 9 0 1 A design will be reviewed when 3 copies 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. '1 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" � Permit Number: SWG t 02.5- O0/47 Designer's Name: Arrow Septic Designs,Inc Applicant's Name: Vanessa DiBenedetto Designer's Phone Number: (360)898-2255 Mailing Address: 7639 191st Ave SW Designer's Address: 171 E Vuecrest Dr Rochester WA 98579 City State Zip Union, WA 98592 Citz State Zip Designer's Email paulaj@hctc.com c' '-�°' +.a ' -fir,,,r +, n, ' i y a.:1� *�i g D�� c com .,...,ice.-..<.. d.,.k:-:a'� .- ,. -..<C.<...x .a�,f,"DESIGN -.�•IiM7. Treatment Device ❑Glendon ❑Sand Filter 0 Mound 0 Sand Lined Drainfield 0 Recirculating Filter 0 ATU U Other Treatment Level(check all that apply): ❑A ❑B 0 C ❑BL1 0 BL2 0 BL3 0 E 0 N Drainfield Type ❑Gravity fill Pressure C'Trench 0 Bed ❑ Sub Surface Drip Septic Tank/Drainfield Specifications Laterals Number of Bedrooms 3 - Schedule/Class 40 - Daily Flow:Operating Capacity 270 gpd Length (4)25+(4)50 ' ft Daily Flow:Design Flow 360 - gpd Diameter 1.25 in Septic Tank Capacity(working) 1,200 - gal Number 8 , Receiving Soil Type(1-6) 5 - Separation 9 ft Receiving Soil Appl.Rate .04 - gpd/ft2 Orifices Required Primary Area 900 - f}2 Total Number of Orifices 60 Designed Primary Area 900 - ft2 ' Diameter 3/16 • in Designed Reserve Area 900 f12 Spacing 60 in Trench/Bed Width 3 - ft Manifold Trench/Bed Length 300 - ft Schedule/Class 40 • Elevation Measurements Length header ft Original Drainfield Area Slope 2 % Diameter 1.25 in New Slope,If Altered 2 % Preferred manifold configuration used? 6'Yes 0 No Depth of Excavation Up-slope 10 in Transport Pipe from Original Grade Down-slope 9 in Schedule/Class 40 . Designed Vertical Separation 12+ in Length 360 ft Gravel-based Drainfield Required? ❑Yes 66 No Diameter 2 in Pump Required? • RIYes 0 No Dosing and Pump Chamber Pump/Siphon Specifications Number of doses/day 4 Diff.in Elevation Between Pump&Uppermost Orifice 10 ft Dose quantity 90 gal Drainfield Squirt Height/Selected Residual(head) 2 ft Chamber Capacity(flood) 1,000 gal Uppermost Orifice Er Higher 0 Lower than Pump Shutoff Pump controls:Please check those required. Capacity @ Total Pressure Head 35.4 gpm Bf Timer It Elapse Meter cg Event Counter Calculated Total Pressure Head 21.14 ft If Timer: Pump on 2 minutes ,Pump off 6 hours Comments Revised:4/14/2025 10Fg DESIGN FORM—PAGE TWO Assessor's Parcel Number:3 2 0 2 8 — 5 0 — 0 1 9 0 1 Permit Number: SWG DESIGN CHECKLISTS Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch g Test hole locations It Drainfield orientation and layout Reference depth from original grade: g Soil logs It Trench/bed dimensions and g Septic tank g Property lines critical distances within layout It Drainfield cover Existingand proposed wells It D-Box/Valve box locations P P Reference depth from original grade within 100 ft of property iiti Septic tank/pump chamber and restrictive strata: ❑ Measurements to cuts,banks,and locations Q( Laterals,trench bed,top and surface water and critical areas g Observation port location bottom ❑ Location and orientation of g Clean-out location 0 Curtain drain collector curtain drain and all absorption g Manifold placement 0 Sand augmentation components g Orifice placement Other cross-section detail: 66 Location and dimension of Lateral placement with distance g Observation ports/clean-outs primary system and reserve area to edge of bed Buildings Other Information 121 Audible/visual alarm referenced Yes No Iii Direction of slope indicator g Scale of drawing shown on scale g 0 Design staked out ❑ Waterlines bar g 0 Recorded Notices attached g Roads,easements,driveways, ❑ Elevation benchmark and relative 0 RI Waiver(s)attached parking elevations • tern components g ❑ Pump curve attached gNorth arrow and scale drawing r f g 0 Evaluation of failure shown on scale bar .`'' Non-residential justification '.St• 0 Waste strength 4°� �'OyA. � 0 It Flow '_:ESI et .'. ' - AL The undersigned designer must be not E ,e,r)k 1,� . S•lation RI Yes 0 No �� , Signature of Designer Date ,n The undersigned has reviewed this design on behalf of Mason County Public Health and determined it tb IOW compliance with state and local on-si lations: � 1 SlZ /?aMAY 12 .l 71 /:�s�,� ZOZS Environmental Health Specialist Date QUN1yENnnvl11R,,O ,� CAUTION: DESIGN APPROVAL IS VALID ONLY UNDER THE FOLLOWING CONDITI'O1*Ik h�'ENTq�h„ ✓ The design is stamped"Approved"by Mason County Public Health. �� �� ✓ The Onsite Sewage Permit has not expired,the Permit Expiration Date is: ✓ Drainfield site conditions have not been altered to adversely affect 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. This form may be scanned and available for public view on the Mason County Web site. Revised:4/14/2025 Arrow Septic Designs 171 E.Vuecrest Dr. Union, WA 98592 April 21,2025 Mason County Department of Health Services 415 N 6th St Shelton, WA 98584 RE: Vanessa DiBenedetto(Parcel #32028-50-01901) Evaluation of Failure Dear Inspector: Attached is a replacement septic design for a property located at 131 SE Alder Rd,Shelton,WA 98584. There is an existing 3-bedroom home built in 1941 that ties into a gravity septic system presumably of the same era. There are no original septic records for the permit or the installation. The existing system has a 1,000 gallon 2-compartment concrete septic tank followed by a gravity drainfield of unknown size. The septic system was recently pumped for the home sale,and there was a high effluent level with leaking lids and the drainfield was not accepting water. The existing tank is old, in poor condition,and undersized so it is to be decommissioned or removed and replaced with a new 1,200 gallon minimum 2-compartment septic tank with an effluent filter. The septic tank will be followed by a new 1,000-gallon pump chamber. The new drainfield consists of 900+s.f.of shallow pressure trenches using an application rate of 0.4. The system will also have a control panel including timed dosing,a counter and elapse meter to prevent overuse and facilitate ongoing operation and maintenance.This is a non-conforming repair with 12"+of vertical separation. There are no surface water or well setback issues and we have designated a full reserve drainfield area. The drainfield is on the adjacent parcel#32028-50-01007 so a Restrictive Covenant for On-Site Sewage System document is being filed on the deed to record the easement. The property owner's contact information is as follows: Vanessa DiBenedetto 7639 191 st Ave SW Rochester, WA 98579 (847)212-7019 If you need further information,please contact my office at(360) 898-2255. Sincerely, • • atif App. e • r1a MAY 1 4025 ua�L'�C�lS��pESiG�i: PAULA JOY �a��� hl�vON�OUNh'ENVIRO, Pauli , ,i� a � Q��� AC h'EAC,- Licens (tnsite astewater Treatment System Designer 2aF9 ;�......1_. ... a ° .; ♦, ti: t ati �� aee 4 Abe b qz ! r I., o��''C♦C \'tom,�4 , k t.4— 2a 0 ash k ,2.'.srie .._:R;�.:-v ♦ �h11p°`i���4i` !Nal %v,'4'2�ytj°• '0Q4 L`.i. � 1, o e ��Rrrr p.� I°',? $$°�°o , h,-- 3°' �ta ok,o �V NNI •♦\'C Cl ;� �� °°y`�;�o�, :fie t � ,:�°r\��s �. k' r�4 ti L OC\. .' pH uc a our ! .---'43'j Ct r 1_°y o s o 1° SL * V`.�c°L I C NINO # — � i ec�1toE � ic o L ~ I I' ^ 1 cR u � ti. ` ec ` g 4 p `tQt oa° S li z o t. . 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PAULA JOY JOHNSON•' . 31 1200 Gallo= Septic _ 1:CVil8n UESi01v8a" i PAS LE L 32.02B-50 - o tRo ( 2-Conpartznent with Exi+g s�i i Effluent Filter -ZZ.-ZS l SE �+1-1)E2 RI) O 1000 Gallon Plump Chamber S ---- am N \O A al .59`t 1 O Valve Control Box --T- Cr 4401- ® 0 I d -E-a.v1/4(k --0 be_, A a co w.w6$ io h ed ov vet4A ed ri-1 22-`t SON oy `o A- Res -co TILL_ (4)VX5o `+ (4)3' x2"S' PRlr-lp1R,A D•F 1-2ENcliES 2. D ^ lQ n 5L-“-ce,bTS)\A'Z2. Stt-T e ci ' C), _ W I -r t-1 Res QJE. /N 13Eru EE N L O pc0"t -C C "TILL- 4-S: ,24„ 51--/L6 k CZDCTS 'Cc-1-1u" T o 4'2_0 MAY 1 2 2025 MASON COUNTY ENVIRONMENTAL HEALTH DJA <-2"-t A'Spe L.tIsiF 0 'r CvZe`' ' Box vit.: IPS Bet valves Q �_..__ s t J o 'i p•C ' I s O a 1 i N • 'yet..C-Rt. I s i •-J 14c I- T '.Z5* :ClCG. 'Z. FeeCc Lies + i" 1`€°t6"Pr� oN ORT 015'.��cKvA�T� � o -41--_ S V —, Q t",), :. �-.""""a (q0� S te- I - MAY 1 2 20T T� c7 P H MASON COUNTY ENV!;�u; ;:�; ;,;� =ra c DJA • it • , , .. ..„, ..,A.,.. „.., :r •=Ca.� FIDE �`• ?��/� -1Zcover < fd ; d— I -FAG C,2 ," : ; t 1.— = i', 5 4": ! tit.".'' 77T�� ! t �� '� PAULA JOY JCMNSCN C } ' a.L'tC�LA J .Y.3i<' to 2-ii2 ' p -- :zs _-C�: it .tl »k b SEM.6.61 ' Rook ExPIRE j 6 2,�ZS y 4- - 12t - 45 Ct Elbow Drain-Field Cross-Section View Not TO Scale L'e O\A. Deo: - C7Cct C' • w Op&r-vc �' FT _ Note: GCI.X. •O �JC frC,', C.: to 6 -YC 105 7GOtY rio. O, Se 4'�•"Vr r- front Bottom ieC. 'Cy Oe =: .hGC woe' MG^k G.w Yet.. RCOG. Vec--, O;-: In =e t on Grote- Rcer.--K c -*.e E..-d o` Et& t-atGd- ort Pipe. Arer=" O, �- r � System. Arrow �ep c sy�:s 8tirirnar. of Tot (360) 898- 255 6oFq Length Length Orifice # Distance from Distance from Lateral# (In.) (Ft.) Spacing Orifices Feeder Line(In.) Cleanout(In.) 1 600 50 60 10 30 30 2 600 50 60 10 30 30 3 600 50 60 10 30 30 4 600 50 60 10 30 30 5 300 25 60 5 30 30 6 300 25 60 5 30 30 7 300 25 60 5 30 30 8 300 25 60 5 30 30 Total Lateral Length 300 Total#Orifices 60 GPM = 35.4 Dynamic Head Calculations Selected residual pressure: 2 ft. Length (Ft.) #Orifices Transport Pipe 360 60 7.62 ft. Feeder Total Lateral Line Length Lateral#1 50 2 52 10 0.29 ft. Lateral#2 50 7 57 10 0.31 ft. Lateral#3 50 12 62 10 0.34 ft. Lateral#4 50 17 67 10 0.37 ft. Lateral#5 25 2 27 5 0.04 ft. Lateral#6 25 7 32 5 0.05 ft. Lateral#7 25 12 37 5 0.06 ft. Lateral#8 25 17 42 5 0.06 ft. Total Elevation Lift 10.00 ft. Total Dynamic Head ...i 21.14 ft. Y i ,o1. I il :~ �.0,: PAULA Joy JOHNSON . ,' r� UCmtVS� 'l„�aiGNrf� y .,,./ 4 PREr MAY 12 2025 MASON COUNTY ENVIRONMENTAL HEALTH DJA l00F l 137, 1 39 Bronze construction available(139 series) , High head version available(145 series) • Double shaft seal versions available for added protection Flow-Mate on models 140/145. For more information,see Technical Data Sheets FM2782,FM2783. In high head dewatering or effluent applications where pumping performance is critical, this robust ,- -+. r.> _ PUMPP0RFORVNCE CURVE family of pumps is known for reliability, — MOOEL13LifO145 durability and performance. These ,. .5 •,����.��� pumps are especially suited for harsh - c . ,■■■■.■■■E environments.Zoeller's coot run design ■,■■�■■�■ Cl/and corrosion resistant,powder coated �., ■■■■■■ C epoxy finish add up to a long-lasting, u ■■,�■■■.■■ trouble-free product. 1 .71 i _ ,‘'1111MIIIIIMI m APPLICATIONS: -n • STEP or onsite applications 3" ■•,,,■■�■■ • Water transfer • L ■■•`u■ •■ ■ C • Light commercial dewatering • ■■••,■11111■■ Z SPECIFICATIONS: _-__ •'''••,■■■ • 1-1/2"NPT discharge ry_ , •■■IIMARA ■■ • 1/2 HP through 1 HPMA —— • E •••■■1,,`■• g SI ANAJIIEIIN TMI11C11SA .■■■■„■"■ • Available in automatic or nonautomatic • Model 137,139,140:1/2"(12 mm)spherical solids 1111111.11®1.11®® capacity with vortex impeller • Model 145:3/4"(19 mm)spherical solids capacity with "vs, K •p vortex impeller R,o,:11,4,.,,1, 752 6 5 ` 151, __.-__,. y 2 W PUMP PERFORMANCE CURVE SENT I MODEL 1511152/153 Dose-Mate • 50 This is our fastest growing line of effluent 14— 45153 pumps.The 150 series is truly a workhorse designed for reliability under extreme 12- 40 conditions in an effluent environment. ' 150 series pump curves cover a wide range = io 35 152 of applications. They are well suited to 1; - 1 30 applications with low pressure pipe(LPP) ,i g 8—. 25 151 and enhanced flow STEP systems.Zoeller's cool run design and corrosion-resistant, o powder coated epoxy finish, in addition s— Zo to the hermetically sealed, oil-filled motor 15 and non-clogging vortex impeller add up to 4— a long-lasting,trouble-free product. to ' r 2 APPLICATIONS: l•� 5 • STEP or onsite applications 0 • MADE IN THE USA to 20 30 4o so 60 70 B0 90 100 • Light commercial dewatering LIIISAMAMIIYitLIME GALLONS LITERS I 1 SPECIFICATIONS! 0 40 80 120 160 700 740 780 320 360 • 1-1/2"NPT discharge 6.,:.c5 F — _ FLOW PER MINUTE .t ca • 3/10 HP through 1/2 HP 0 t`sue' • Available in nonautomatic or with a variable level piggyback mechanical switch MAY 1 2 nn'-' • 1/2"(12 mm)spherical solids capacity with vortex I a'Z3 thermoplastic impeller MASON COUNTY ENV(w:'; . - For more information,see Technical Data Sheet FM2784. . ©All rights reserved. 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INSTALLATION & MAINTENANCE Pressure Distribution Systems . ' sioosas ti] PAULA JOY JOHNSON.' p` fy UCEX1St »�$iGN�a 1. Install Laterals with contour of the ground. 2. Install trench bottoms level. Lf—ZVZS 3. Install locator tape or rebar at each end of all drainfield laterals. 4. Install observation ports as indicated on the plot plan. One required at distal end of each lateral in drainfield with bottom extending to the drainrock/native soil interface. Glue "T"to bottom so Observation Port cannot be easily removed from ground. Install removable cap on top of port at final grade level. 5. Install drainfield during dry weather and soil conditions; any soil smearing must be eliminated by hand raking. 6. Install threaded clean-outs at the end of all laterals (cap must extend to within six inches of finished grade and be marked with locator tape or rebar). 7. Install audio/visual high water level alarm. 8. Install 1/8"mesh non-corrosive pump screen (min. 12 sq. ft. surface area, not to interfere with controls or floats.) Or pump screen may be substituted with Bio-Tube in septic tank and block under pump. Pull bio-tube every 6-12 months and flush back into tank. 9. Install anti-siphon valve above pump in pump chamber to prevent the pump chamber from siphoning into the drainfield. 10. Install check valve in pump outlet line to prevent system from draining back into the pump chamber. 11. Tee to Tee construction between laterals and manifold with orifices oriented at 6 o'clock. Install laterals to the manifold with the orifices at 12 o'clock, (do not glue), after pressure test and Environmental Health Dept. approval, turn orifices down (6 o'clock) and glue laterals to manifold. Orifice shields may be used with orifices in the 12 o'clock position in lieu of turning the orifices down to the 6 o'clock position. 12. Filter fabric required over drain rock prior to back filling. If the drain rock extends above natural grade, run the filter fabric at least 2 inches down the trench wall. 13. Waterlines must be a minimum of 10' to any tank or drainfield(a reduction to 5' may be obtained with a State waiver on lots that meet minimum lot size). Encase all water lines within 10' of septic transport lines and under any driveway/parking areas. 14. Divert all storm water runoff away from on-site sewage system. 15. No curtain drains allowed within 10' of the up-slope edge or 30' of the down-slope edge of the drainfield and reserve area. 16. Have the septic tank and pump chamber pumped or inspected every 3 years minimum. 17.No vehicular traffic over drainfield area or tanks. 18. Inspect floats, clean filters, and test high water level alarm every 6-12 months as needed. 19. All materials and workmanship must meet County and State regulations. 20. Deviation from this design without prior approval from the Designer and Mason County Environmental Health Department will make this design null and void. 21. All manhole lids and access, sampling or inspection ports must have locking covers and be located at ground level. 22. All pressure systems with a pump chamber outlet higher than the drainfield must have an anti-siphon valve or a 1/8"hole drilled in the discharge pipe above the.pump to prevent siphoning. Ensure anti-siphon hole sprays down/away from tank Perin `�; 23. All transport lines under driveways or parking areas must be encased to prevent crushing. 24. Homeowner is responsible for all property lines and easements. MAY 1 2 2025 q p.F9 MASON COUNTY ENVIRONMENTAL HEALT'' DJA