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HomeMy WebLinkAboutSWG2026-00173-APPLICATION/DESIGN - SWG Application / Design - 8/24/2026 MASON COUNTY 415 N 6TH STREET,SHELTON, ,WA 98584 • 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: SWG2026-00173 APPLICANT GORDON SCOTT E Phone: Address: 91 E TWANOH FALLS DR BELFAIR, WA 98528-9550 OWNER GORDON SCOTT E Phone: Address: 91 E TWANOH FALLS DR BELFAIR, WA 98528-9550 SEPTIC DESIGNER PAULA JOHNSON* Phone: 360-898-2255 Address: 171 E VUECREST DRIVE UNION, WA 98592 Site Address: E Twanoh PI Primary Parcel Number: 222205200048 Permit Description: New 2BR SFR-Nuwater to pressure bed Permit Submitted Date: 06/02/2026 Permit Issued Date: 06/24/2026 Issued By: Jeff Wilmoth Current Permit Fees Paid: $570.00 (additional fees may be required upon installation of system). Permit Expiration Date: 06/16/2029 (based on date of inspection) Permit Conditions: I Approval of this septic permit does not approve the building location. Building location is subject to approval from all applicable departments and regulations. 2 Proposed development subject to zoning requirements and approval by the planning department staff per Mason County Title 17. 3 Permit must be installed by a Mason County Certified Installer unless prior written authorization from Mason County is obtained. 4 Drain field installation not to exceed designed upslope and downslope depth specified on design form. 5 Installer is responsible for obtaining Mason County installation approval prior to backfill of system components. 6 Installer is responsible for obtaining Septic Designer/Engineer installation approval prior to backfill of system components. 7 Mason County Asbuilt Form, Record Drawing, and Installation fee must be submitted for final installation approval. 8 A full GEO report will be required for the Building Permit 9 Comply with recommendations in letter Dated 3/15/26 from Envirotech Engineering 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/onsite/oss-inspection-request.php or call: 360-427-9670, extension 400. OFFICIAL USE ONLY MASON COUNTY•. DATERECENED: OLo I oaf AMOUNTMCEIVED: RECENEDBY., Q) Cl) Public Health Fit Human Services IJ (� Environmental Health 360-427-9670,ext.400 or 360-275-4467,ext.400 415 N.6th Street-Shelton,WA 98584 5®AJ G �( � 1 0 X ON-SITE SEWAGE SYSTEM APPLICATION > APPLICANT PHONE mr Scott Gordon (360)731-2233 z MAILING ADDRESS-STREET,CITY,STATE,ZIP CODE 91 E Twanoh Falls Dr Belfair WA 98528 m SITE ADDRESS-STREET,CITY.ZIP CODE O E Twanoh Place Belfair WA 98528 - I NAME OF DESIGNER PHONE = Arrow Septic Designs, Inc (360) 898-2255 NAME OF INSTALLER PHONE D N Ni PERMIT TYPE(select one) DRINKING WATER SOURCE O RESIDENTIAL OSS (COMMUNITY OSS COMMERCIAL OSS f PRIVATE INDIVIDUAL WELL PRIVATE TWO-PARTY WELL Z I o TYPE OF WORK(select one) t PUBLIC WATER SYSTEM 91NEW CONSTRUCTION/UPGRADES E3REPAIR/REPLACEMENT OTHER DETAILS(select all that apply) ❑ TABLE X REPAIR I (71 SUBMITTALS ❑ SURFACING SEWAGE ❑ EXISTING FAILURE ❑SHORELINE DESIGN FORM(REQUIRED) SEPTIC DESIGN(REQUIRED) BEDROOMS LOT SIZE WAS LOT CREATED AFTER 411/2025? Q I N WAIVER(S)(IFAPPLICABLE) 2 BR .4 ac O YES Q NO T. IO DIRECTIONS TO SITE AND SITE CONDITIONS:(ex.locked gate) I Head toward W Alder St and turn (R). At the traffic circle, take the 3rd exit and go up I o Northcliff Rd. Take a slight (R) at the light onto E McReavy Rd. Turn (R) onto E Dalby Rd. r I o Turn (R) onto Hwy 106. Turn (R) onto E Creekside Dr. Turn (R) onto E Twanoh PI. Park at bottom of driveway and walk up. I .4. aoI SITE MUST BE FLAGGED FROM MAIN ROAD AND TEST HOLES MUST BE FLAGGED WITH TEST HOLE NUMBERS. Co OFFICIAL USE ONLY BELOW THIS LINE UPGRADE I FAILURE SOURCE(for reporting purposes) ❑VOLUNTARY ❑MAINTENANCEIPUMPING ❑BUILDING PERMIT ❑HOME SALE ❑COMPLAINT ❑OTHER: INSPECTOR SOIL LOGS COMMENTS/CONDITIONS 9 RECORD DRAWING AND INSTALLATION REPORT SOIL CODES: V=VERY G=GRAVELLY S=SAND L=LOAM Si=SILT C=CLAY CIAY EEXTREMELY R=ROOTS REQUIRED FOR FINALAPPROVAL. PECTOR SIGNATURE DATE APPLICATION EXPIRATION DATE PLICATION APPROVED/ISSUED BY DATE ( -2ç ( 7 ��MMAY BE SCANNED AND AVAILABLE FOR PUBLIC VIEW ON THE MASON COUNTY WEBSITE Revised:4/14/2025 EgL eeY� , ?LLC. eteeteervtiea ° rirol & vtaL°Dr %v e °Rya {way March 15,2026 - Scott Gordon 91 E Twanoh Falls Drive Belfair,Washington 98528 Reference: Geotechnical Site Assessment Twanoh Place,BeLfair,Washington Parcel 22220-52-00048 Dear Mr.Gordon, Envirotech Engineering, PLLC has completed a site assessment of the general soils and surface conditions for the referenced property. This site assessment was partially based on a site visit performed on March 11, 2026 in order to evaluate geological hazards, and identify the feasibility of constructing a single family residential structure and septic system on the referenced property. Envirotech offers the following conclusions: ® It is our understanding that the septic drainfield will be located within the northern third of the property. This is acceptable from a slope stability standpoint, and drainfield setbacks are not required. ® The critical ascending slope to the west with grades exceeding 40% should not be cleared of vegetation.A building setback of 10 feet should be maintained from this slope, unless mitigation is completed. This mitigation includes incorporating a catchment wall within the home stemwall foundation that extends a minimum of 4 feet above grade along the side of the home that faces the slope. o The critical descending slope to the south with grades exceeding 40% should not be cleared of vegetation.A building setback of 25 feet should be maintained from this slope, unless mitigation is completed. This mitigation includes incorporating deeper foundations within the portion of the home that encroaches the setback.This includes extending the foundation an additional 42 inches in depth for every 5-foot of setback reduction. o Roof drainage should not be infiltrated on the property. The property may be graded to allow above ground downspouts atop splash blocks to veer away from the steep descending slope. Alternatively,roof water may be tightlined to the slope toe if within the property limits. PO o&94 .eL i ref r,1NJ5�1 v gtoJ 9858 o-Ff: 3O- SJ3�-4 C, 3(29-ro£j- O45 ewvircte�n@�e�_echr i a6�wlo.cory Thank you for the opportunity to work on this project. If you have any questions or need any further. assistance,please contact Michael Staten at 360-275-9374. Sincerely, Envirotech Ene neering 315I26 Michael Staten,P.E. Project Director Page 2of 2 DESIGN FORM—PAGE ONE Assessor's Parcel Number: 2 2 2 2 0 - 5 2 - 0 0 0 4 8 A design will be reviewed when 3 copies of each of the following are submitted: Completed design form that has been signed and dated. e°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 scanned and available for public view on the Mason County Web site.Maximum pqper size: 11"X17" Permit Number: SWG — Q)O 1 7? Designer's Name: Arrow Septic Designs, Inc Applicant's Name: Scott Gordon Designer's Phone Number: (360)898-2255 Mailing Address: 91 E Twanoh Falls Dr Designer's Address: 171 E Vuecrest Dr Belfair WA 98528 City State ,Zip Union, WA 98592 City State Zip Designer's Email paulaj@hctc.com ,,.;, ,„ ra.,t,.3x�'?z''.s s r�`6 ✓ <F-^a.*sa: -, �` """v, ,-2yF '�," p e,3��1*'���`. �x.." �..�F �}. TE .?.�..tea. Treatment Device ❑Glendon ❑Sand Filter 0 Mound ❑Sand Lined Drainfield 0 Recirculating Filter El AT'U'NuWater BNR-500 ❑Other___________ Treatment Level(check all that apply): ❑A 21 B ID C ❑BL1 El BL2 El BL3 El E 21 N Drainfield Type ❑Gravity I 'Pressure ❑Trench I 'Bed ❑Sub Surface Drip Septic Tank/Drainfield Specifications Laterals Number of Bedrooms 2 Schedule/Class 40 Daily Flow:Operating Capacity 180 gpd Length 30 ft Daily Flow:Design Flow 240 gpd Diameter 1.25 in Septic Tank Capacity(working) NuWater BNR-500 gal Number 4 Receiving Soil Type(1-6) 3 Separation 2.5 ft Receiving Soil Appl.Rate 0.8 gpd/ft2 Orifices Required Primary Area 300 ,ft2 Total Number of Orifices 24 Designed Primary Area 300 ft2, Diameter 3/16 in Designed Reserve Area 300 ft2 ,c:' Spacing 60 in Trench/Bed Width 10 ft Manifold Trench/Bed Length 30 ft- Schedule/Class 40 Elevation Measurements Length 7.5 ft Original Drainfield Area Slope 2 % Diameter 1.25 in New Slope,If Altered 2 % Preferred manifold configuration used? I 'Yes ❑No Depth of Excavation Up-slope 26 in Transport Pipe from Original Grade Down-slope 24 in Schedule/Class 40 Designed Vertical Separation 34+ in Length 25 ft Gravel-based Drainfield Required? Yes 0 No Diameter 2 in Pump Required? I f Yes ❑No Dosing and Pump Chamber Pump/Siphon Specifications Number of doses/day 4 Diff.in Elevation Between Pump&Uppermost Orifice 6 ft Dose quantity 60 gal Drainfield Squirt Height/Selected Residual(head) 2 ft Chamber Capacity(flood) 1,000 gal Uppermost Orifice Higher ❑Lower than Pump Shutoff Pump controls:Please check those required. Capacity @ Total Pressure Head 14.16 gpm El Timer 0 lapse Meter ❑4vent Counter Calculated Total Pressure Head 8.38 ft If Timer: Pump on 2 minutes ,Pump off 6 hours Comments � F • MASON COUNTY ENVIRONMENTAL HEALTH Revised:4/14/2025 DESIGN FORM—PAGE TWO Assessor's Parcel Number:2 2 2 2 0 - 5 2 -- 0 0 0 4 '8 Permit Number: SWG hAw"� v,; Y ; ,.�.'u s .},,ya}4 ,.:".v*, w F ,�tS » Cry., h a,."� cF ',t",':i�."2; Ssr 1''yra- 'e 4•., Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch 66 Test hole locations Gd Drainfield orientation and layout Reference depth from original grade: 66 Soil logs 56 Trench/bed dimensions and 6f Septic tank 66 Property lines critical distances within layout 61 Drainfield cover 0 Existing and proposed wells 0 D-Box/Valve box locations Reference depth from original grade within 100 ft of property 61' Septic tank/pump chamber and restrictive strata: 6t1 Measurements to cuts,banks,and locations 11 Laterals,trench/bed,top and surface water and critical areas 56 Observation port location bottom ❑ Location and orientation of 69 Clean-out location ❑ Curtain drain collector curtain drain and all absorption Ed Manifold placement ❑ Sand augmentation components Q( Orifice placement Other cross-section detail: 6�1 Location and dimension of Ed Lateral placement with distance Ef Observation ports/clean-outs primary system and reserve area to edge of bed Other Information 6� Buildings g Audible/visual alarm referenced Yes No 6� Direction of slope indicator 9 Scale of drawing shown on scale w 0 Design staked out 6l Waterlines bar 0 LiI Recorded Notices attached 6f Roads,easements,driveways, p Elevation benchmark and relative 0 r Waiver(s)attached parking elevations of system components ❑Pump curve attached 61 North arrow and scale drawing ❑ ST Evaluation of failure shown on scale bar Non-residential justification 0 [f Waste strength ❑ C2fFlow s ..w..»z 5- `'x°, x. .:-k�F.,t„ P... <.'` _,x c'';+.s„ �. kwt{,.„„,,:u°: i A .k. A° .h"aS,«,w,. .✓,:P..k .5,...k `av1..'�S.z�wKc" cf JJe�i__� '7.�'' 3' The undersigned designer must be notif $allation 56 Yes 0 No jc' jp - Signatur � FiaPdf .. , Date The undersigned has reviewed this design on behalf of Mason Cdunty Public Health and determined it to be in compliance with state and local on-site regulations: �^ ZrJq\ ✓�� — 7ironrn .1 Health Specialist Date CAUTION: DESIGN APP OVAL 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: (I t ✓ 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 R• "^r^iF,k��• �{a9 , `mar 1l, v f8 t a ass —1j A << s 1 j' N �a y / = t � JUN 2L 2026 x ' MASON COUNTY ENVIRONMENTAL HEALTH 1 0 © WAS A .. 2\ 'kc i, ems' \ \ 2 \ I2 � . o--z� J' &LS) \ .. v \>> Y \ \ .p-tEa SAD-(- \) M LA EIS SGt - 3Q ' Audio-Visual warm ® l 3d c 6� �t�✓✓ p � O Cleanout 5 CD. - c (3 NuWater B_NR-500 qTU Tank 1,000 Gallon Pump Chamber **Note to installer` ` Sleeve waterline when within 10' of septic transport line.Maintain t1 10 minimum between water line and septic tanks/drainfield. 01VAs��� �i ll ' y 55-00349 a' PAULA JOY JOHNSON4 �\ 3 1MASON COUNTY ENVIRONMENTAL HEALTH • tGG�� �bs.xve�� °n. L a�5 • p - 5109 - - - PAULA JOY JOHNSON•��( LIL�t3S���$lCR4��3"• O 52rv0.1a0hPoork 0 ral 4 1iV%c— _Gvc r-i It r�abr; Sand taatA COVILY $;l� L .z " , t • L. ® $e ge 3' �C• N45 � YtEE OR Mac mid iw Lsy D p= Part—tob Cpgf WW' MALSWEEPJNG 9 . pvc i fim bomom.afbW to 8i A ccWsb:t!be'�wWW(m •BNT • imp, ob>s"3�oa bottom Dg pipe cm�'t sa�ooar�d. jn ystem me is car= b �tirt . MARE Elm WIITR REAR B REODIRED AT of E4= LATE `A/ J JUN 2 2026 4ô1 1 • MASON COUNTY ENVIRONMENTAL HEALTH Jqw Length Length Orifice # Distance from Distance from Lateral# (In.) (Ft.) Spacing Orifices Feeder Line(In.) Cleanout(In.) 1 360 ; f),,. H" 60 6 30 30 2 3603Qa,$s; 606, 30 30 3 360 K30 60 6 30 30 4 36030,.. 60 r,≥ i, „ 30 30 Total Lateral Length 120 Total#Orifices 24 GPM= 14.16 Dynamic Head Calculations Selected residual pressure: 2 ft. Length(Ft.) #Orifices Transport Pipe 25 r 24 0.10 ft. Feeder Total Lateral Line Length Lateral#1 30 f 4 34 6 0.07 ft. Lateral#2 30 ' ,2 32 6 0.07 ft. Lateral#3 30 2 32 6 0.07 ft. Lateral#4 30 4 ru 34 6 0.07 ft. Total Elevation Lift 600," ft. Total Dynamic Head 8.38 ft. SECURED Lin W M GAS TIGHT SEAL THREADED UNION Z4'OOAf Ate RO a SERVICE VALVE` FlIOISH GRADE — ( -- r o ORAINFIELO ICY STORAGE A E* MIOM WATO AL4M LEM WORNM VOLUME FLOAT STEM !NORMAL OIL LEVEL MOllN1lM1G t PUMP CHECK VALVE• �: PAULA JOY JOHNSON . PUMP C q ' 8�(�lS tCrd # £IYPt °CALL e-2 Z.6 ter 246-2 : C E Septic Tanks must meet standards required by WAG chap ealth list of registered sewage 4 manufacturer must be on Dept of H 5 MASON COUNTY ENVIRONMENTAL HEALTH za„ iss J W Bronze construction available(139 series) ��+ f High head version available(145 series) '" '"" Double shaft seal versions available for added protection Flow_Mate on models 140/145. �Y� For more information,see Technical Data Sheets FM2782,FM2783. In high head dewatering or effluent applications where pumping performance is critical, this robust W PUMPPERFORMANCECURVE Mo0Eu3rnaa,as family of pumps is known for reliability, 16 durability and performance. These ,, pumps are especially suited for harsh environments.Zoeller's cool run design M 66 Iw and corrosion-resistant,powder coated m epoxy finish add up to a Long-lasting, -- trouble-free product. 6 so i u u APPLICATIONS: • STEP or onsite applications _2'2 a • Water transfer 1„ '� • Light commercial dewatering S 'S SPECIFICATIONS: OFF 6 M • 1-1/2"NPT discharge 6 • 1/2 HP through 1 HP lt1ADE IN THE USA " • Available in automatic or nonautomatic OSINRAMAJOINYOFLI CONiENi is in • Model 137,139,140:1/2"(12 mm)spherical solids capacity with vortex impeller r�rns n M m a so m m m m im • Model 145:3/4"(19 mm)spherical solids capacity with o m vortex impeller flQ PERW`VME 152656 PUMP PERFORMANCE CURVE Dosa Math MODEL 151/1521153 50 This is our fastest growing line of effluent 14 46 153 pumps.The 150 series is truly a workhorse designed for reliability under extreme 12 ao conditions in an effluent environment. 150seriespumpcurvescaverawiderange = 10 35 152 of applications. They are well suited to 30 applications with low pressure pipe(LPP) and enhancedflowSTEPsystems.Zoeller's a 25 151 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. 10 2 APPLICATIONS: 5 • STEP or onsite applications 0 MADE IN THE USA 0-- zo 30 40 5o so �o a0 sa too • Light commercial dewatering OSIRSAIIMORIiYOFNSCORIENi GALLONS SPECIFICATIONS: LITERS 0 40 60 120 160 200 240 260 320 360 • 1-1/2"NPT discharge FLOW PER MINUTE 014508 • 3/10 HP through 1/2 HP • Available in nonautomatic or with a variable level piggyback mechanical switch • 1/2"(12 mm)spherical solids capacity with vortex thermoplastic impeller For more information,see Technical Data Sheet FM2784. F' , ©All rights reserved. ZOELLER PUMP CO. 1502-778-2731 1800-928-7867 41 EiitJJVViIRONMENTAL HEARTH WATERTIGHT LID VENT(typ) DUAL PORT AERATOR RISERS(TYP) 36'MAX. I-PVC(TYP) o 0 AR PVC MASTIC AIRLINE Y COUPLING &REDUCER 6' YTEE 1'PVC SLUDGE 12° RETURN LINE � i 2•PVC � � I TRASH CHAMBER DIGESTER CHAMBER CLARIFIER OPERATING CAPACITY:417 GALLONS OPERATING CAPACITY:421 GALLONS CHAMBER FLOOD CAPACITY:490 GALLONS FLOOD CAPACITY:494 GALLONS 160 GALLONS FLOOD:191 GAL. I 36' e 1°X1/2 ' o TEE 0 0 0 I 6 h` F, DIFFUSER BARS(2) 1Y J N 2 ' 2026 j, PARALEL TO TANK WALL 3' n I MENTAL HEALT SLUDGE RETURN V / 1.5 TAPER SIDE VIEAA! 1'=1.4 K STONE-FREE NATIVE SOIL OR COMPACTED SAND INSTALLATION INSTRUCTIONS OVER STONY SOIL 1)Excavate tank hole with vertical walls to 1 foot larger than tank on all sides. 2)If bottom of hole is stony,install 3"of compact sand&level 9'2° outwithscreed. 3)Install tank in center of hole,keeping 1 ft.void space on F -i r all sides. ! 24 RISERS t1TV > 24•BLOWS 4)As tank is filling with water,fill in void space with compact ! SING CA granular(sandy)soil free of large dumps of clay. I I �\ TOP OFLI 5)Install rest of system,&affix risers to adapters with waterproof adhesive. I i 6)Perform watertightness test In field as required by local ! I I !! ! jurisdiction. I 7)Upon approval to backfill,carefully backfill with native I I i 1Y RISER I I soils over top of tank. i TRASH CHAMBER I! DIGESTER !I CLARrFIFRI 8)Final grade the surface to avoid chanelling surface L______J L_____ J L water toward tank. TOP VIEW 1" 28R AEROBIC TREATMENT TANK DETAIL FOR NU WATER BNR.500 TREATMENT UNIT ENVIRO-FLO, INC. 3/01112 s e Wastewater Treatment Technologies `°''•�ar"r�` P.O.BOX 321161,Flowood,MS 39232 (877)836-8476 (601)845-4716 fax scacE n — www.enviro-flo.net 7.4 ..s°\tS.Kiczc�d art—ec„Ca:.,9:?'Yt'ct�T 8Xriini�^cr- Eo:.7 f \. R = � ' l f a lEE PARTS UST NuWater NR Assembly Diagram A DUAL.PORT AERATOR M.'POLY DIFF'!)SER B1AR(2� B,;3/8'RUBBER 9a°WL:CIAMPS(2) N.'1"PVC(3.112":SECTION) C:'3/8'SWBEU ADRPTORX 10-AJPT(Y) O.1":SL€P Ck? O.112"SLIP X 1T2 NPT ADAPTOR P.1/8"CLEAR PVC:HOSE(OPTIONAL 59 s'STREET z1r2'NPI 8USHING(3) 0.112"•PVC'PIPE(BY INSTALLER) F.11Z 90St.BQW C31 R.'1"PVC PIPE(EY'P4STALLER) G.1'X 1'X 112'TEE S.2"PVC PIPE(BY.iNSTALLER) H.1"90`ELBOW(3) T.118."BARBED.AOAPTOR'TO'1W-NP7'(2): TX 1°BUSHING U:1122'STREET X 114 NPT BUSHING(2) .E.2"•SANITARY TEE V.1/2"PVC COUPLER(2) i ` s 1( 1 PVC CROSS W.2"CQUPLER.(BY INSTALLER). A N 4 L.1"COUPLER(BY;INSTACLER) J N 2 2026 ,tww, MASON CO NTY ENVIR NMENTAL EALTN Revised �2 i 12 a'tw Sep tic )es dais, I rye A NuWater BNR Pretreatment � INSTALLATION &MAINTENANCE . m `.s�`y Pressure Distribution Systems `` F ' S X349 '.PAULA JOY JOHNSON 1. Install Laterals with contour of the ground. 2. Install trench bottoms level. 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. Redundant off switch not required. 8. Install check valve in pump outlet line to prevent system from draining back into the pump chamber. 9. 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. 10. 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. 11. 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. 12. Divert all storm water runoff away from on-site sewage system. 13.No curtain drains allowed within 10' of the up-slope edge or 30' of the down-slope edge of the drainfield and reserve area. 14.No vehicular traffic over drainfield area or tanks. 15. Inspect floats, clean filters, and test high water level alarm every 6-12 months as needed. 16. All materials and workmanship must meet County and State regulations. 17. Deviation from this design without prior approval from the Designer and Mason County Environmental Health Department will make this design null and void. 18. All manhole lids and access, sampling or inspection ports must have locking covers and be located at ground level. 19.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 opening. 20.All transport lines under driveways or parking areas must be encased to prevent crushing. 21. Homeowner is responsible for all property lines and easements. 22. Please Note: When you begin using your septic system, contact your septic installer to discuss setting up a schedule for your required Operation&Maintenance on your NuWater pretreatment system.