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HomeMy WebLinkAboutSWG2025-00113 - SWG Application / Design - 4/24/2025 MASON COUNTY 415 N 6TH STREET,SHELTON,WA 98584 SHELTON:360-427-9670,EXT 400 A BELFAIR:360-275-4467,EXT 400 —f— Public Health & Human Services ELMA:360-482-5269,EXT 400 FAX:360-427-7787 On-Site Sewage System Permit: SWG2025-00113 C Ov A7CY APPLICANT MAY FAMILY REVOCABLE TRUST Phone: Address: 1510 N COLONY SURF DR LILLIWAUP, WA 98555 OWNER MAY FAMILY REVOCABLE TRUST Phone: Address: 1510 N COLONY SURF DR LILLIWAUP, WA 98555 SEPTIC DESIGNER CINDY WAITE* Phone: 360-701-0205 Address: 80 E PICKERING LANE SHELTON, WA 98584 SEPTIC INSTALLER TJ GOOS* Phone: 360-490-0217 Address: 150 E MARISA PL SHELTON, WA 98584 Site Address: 1490 N COLONY SURF DR Primary Parcel Number: 323095500023 Permit Description: New 2bd Oscar X02 Permit Submitted Date: 04/01/2025 Permit Issued Date: 04/24/2025 Issued By: Rhonda Thompson Current Permit Fees Paid: $825.00 (additional fees may be required upon installation of system). Permit Expiration Date: 04/23/2028 (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 Drain field 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 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. I OFFICIAL USE ONLY -- MASON COUNTY DATE RECEIVED: ` 07 COMMUNITY SERVICES AMOUNT RECEIVED: RECEIVEDE CO 0/1 CO 0 m Public Maalth(Community Health/Environmental Health; ' C In co 360.427.9670,ezt.400 or 360.275.4467.azt 400 415 N.6th Street Shelton,WA 98584 S W G -S - GC31, (3 0 °0 65 ON-SITE SEWAGE SYSTEM APPLICATION x. APPLICANT j PHONE m m MAY FAMILY REVOCABLE TRUST 503-440-7728 z c MAILING ADDRESS-STREET.CITY.STATE,ZIP CODE 3 1490 N COLONY SURF DR LILLIWAUP WA 98555 CO SITE ADDRESS-STREET.CITY.ZIP CODE 1490 N COLONY SURF DR LILLIWAUP WA 98555 I w NAME OF DESIGNER PHONE N CINDY WAITE 360-701-0205 NAME OF INSTALLER PHONE I CA) TJ'S EXCAVATING 360-490-0217 PERMIT TYPE(select one) DRINKING WATER SOURCE 0 a RESIDENTIAL ass n COMMUNITY OSS n COMMERCIAL OSS (1 PRIVATE INDIVIDUAL WELL ❑ PRIVATE TWO-PARTY WELL Z I CD 17 PUBLIC WATER SYSTEM LAKE LIMERICK WS TYPE OF WORK(select one) t rl NEW CONSTRUCTION/UPGRADES Rif REPAIR/REPLACEMENT OTHER DETAILS(select all that apply) 0 TABLE IX REPAIR I Ul SUBMITTALS ❑ SURFACING SEWAGE iil EXISTING FAILURE 0 SHORELINE DESIGN FORM(REQUIRED) SEPTIC DESIGN(REQUIRED) BEDROOMS ' LOT SIZE W hhhhhh o 1ff WAIVER(S)(IF APPLICABLE) 2 116'X100'X181'X96' C) I t DIRECTIONS TO SITE AND SITE CONDITIONS-(ex locked gate) O HIGHWAY 101 TO COLONY SURF, UPHILL TO LEFT AT TOP GO APPROXIMATELY I o ONE MILE STAING ON COLONY SURF DR, LOT IS ON THE RIGHT, HAS RV COVER. o I o --I IN SITE MUST BE FLAGGED FROM MAIN ROAD AND TEST HOLES MUST BE FLAGGED WITH TEST HOLE NUMBERS. I (A.) OFFICIAL USE ONLY BELOW THIS LINE- - - UPGRADE I FAILURE SOURCE;for reporting purposes) ❑VOLUNTARY 0 MAINTENANCE/PUMPING ❑BUILDING PERMIT ❑HOME SALE ❑COMPLAINT ❑OTHER- INSPECTOR SOIL LOGS COMMENTS!CONDITIONS D ---3B ....T . it() ± h ri I 70 --\---n o -2,0 v ,cJS ot-tcAii 1 3 0 "V I I RECORD DRAWING AND INSTALLATION REPORT SOIL CODES: 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 *61‘144tIAA r?-) /. C. t4 bilb I THIS FORM MAY BE SCANNED AND AVAILABLE FOR PUBLIC VIEW ON THE MASON COUNTY WEBSITE REVISED 12/7/2015 DESIGN FORM— PAGE ONE Assessor's Parcel Number: 5 3.9 - 55> 0002- 5 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 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" PARCEL IDENTIFICATION Permit Number: SWG o7Ua,&_C.TV L1.3_ Designer's Name: CINDY WAITE Applicant's Name: MAY FAMILY REVOCABLE TRUS360-701-0205 Designer's Phone Number: ' Mailing Address: 1490 NH COLONY SURF DR 80 E PICKERING LANE Designers Address: LILLIWAUP WA 98555 SHELTON WA 98584 City State Zip City State Zip DESIGN PARAMETERS — Treatment Device ❑ Glendon Biotilter 0 Sand Filter ❑ Mound 0 Sand Lined Drainfield 0 Recirculating Filter,Type: ❑Aerobic Unit Make/Model 0 Disinfection Unit Make/Model Other: X02 TO OSCAR DF Drainfield Type ❑ Gravity ❑ Pressure ❑ Trench ❑ Bed ❑ Sub Surface Drip Septic Tank/Drainfield Specifications Laterals Number of Bedrooms 2 Schedule/Class NETAFIM Daily Flow: Operating Capacity 180 gpd Length 50 ft Daily Flow: Design Flow 240 gpd Diameter in Septic Tank Capacity(working) 1200 gal Number 4 Receiving Soil Type(1-6) 3 Separation 1 ft Receiving Soil Appl. Rate .8 gpd/ft2 Orifices Required Primary Area 300 ft2 Total N r of ices 4x50=200 Designed Primary Area 300 ft`' Dial Poc "S.4Z`�9r EMITTER Designed Reserve Area 300 ft2 S �o co,.-, �J z ti� in p.. ` .5 in Trench/Bed Width �' 1 12 ft z t `r'� Manifold Trench/Bed Length 25 �p IND E WAITE ' ft ,r. clledt tk®EsioNER SCHEDULE 40 0 Elevation Measurements L-ng x,>,,es o5,1o, 45'supply and 45'return ft Original Drainfield Area Slope >1 % Diameter 1 in New Slope, If Altered % Preferred manifold configuration used? ❑ Yes 6/No Depth of Excavation Up-slope 0 in A P P O from Original Grade Down-slope 0 in Schedule/Class Designed Vertical Separation 12 in Length APR z 4 /U15 f t EN �' ENVIRONMENTAL COUNTYE NVIRO,ti'�ILHEALTh-: n Gravelless Chambers Required? 0 Yes 0 No 0 Optional Diameter p c Pump Required? Ef Yes 0 No Dosing �f I Pump Chamber Pump/Siphon Specifications Number of doses/day 360 Diff. in Elevation Between Pump& Uppermost Orifice -2 _ft Dose quantity .5 gal Drainfield Squirt Height/Selected Residual (head) __ ft Chamber Capacity(flood) 1200 gal Uppermost Orifice 0 Higher I�Lower than Pump Shutoff Pump controls: Please check those required. Capacity @ Total Pressure Head gpm Eifimer Ii/Elapse Meter Gi Event Counter Calculated Total Pressure Head ft If Timer: Pump on 30 SEC ,Pump off 3.5 MIN Comments READ PAGE 3 PRIOR TO INSTALLATION. INSTALLER TO NOTIFY DESIGNER PRIOR TO STARTING INSTALL. DRAINFIELD AREA HAS HAD MATERIAL PUSHED OVER, IT WILL NEED TO BE REMOVED TO ORIGINAL GRADE PRIOR TO INSTAL, EXISTING PUMP TANK WILL BE RETROFITTED WITH A DIVIDER WALL. I tc Lr;mtiriv rUKM—PAGE TWO Assessor's Parcel Number: Z 7 " > > 000Z3 Permit Number: SWG 2cn_5— X) i ) -5 DESIGN CHECKLISTS Scaled Plot Plan Scaled Layout Sketch Cross-Section Sketch fig Test hole locations Drainfield orientation and layout Reference depth from original grade: Soil logs EZi Trench/bed dimensions and Septic tank B1 Property lines critical distances within layout Drainfield cover id Existing and proposed wells D-Box/Valve box locations within 100 ft of property id Septic tank/pump chamber Reference depth from original grade and restrictive strata: R1 Measurements to cuts, banks, and locations R( Laterals, trench bed,top and tilt water and critical areas 6I Observation port location bottom ©` Location and orientation of fiAklean-out location 0 Curtain drain collector curtain drain and all absorption p►1Manifold placement 0 Sand augmentation components 4H5rifice placement Other cross-section detail: Qi Location and dimension of Eid primary system and reserve area Lateral placement with distance Observation ports/clean-outs to edge of bed RI Buildings Other Information Lid Audible/visual alarm referenced Yes No fiZ1 Direction of slope indicator lid Scale of drawing shown on scale 13d 0 Design staked out Waterlines bar 0 0 Recorded Notices attached iid Roads, easements, driveways, ❑ 0 Waiver(s) attached parking 0 0 Pump curve attached id North arrow and scale drawing 0 0 Evaluation of failure shown on scale bar Non-residential justification ❑ 0 Waste strength ❑ ❑ Flow DESIGN APPROVAL The undersigned designer must be notified by installer at time of installation lid Yes ❑ No Ci L, A, LI 2 n XS' Signature of Designer Date 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: (‘M 14//- IZ—c Environmental Health S ecialist 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: IZ-3 ✓ 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. Updated Date: 12/7/2015 May Family Revocable Trust 1490 N Colony Surf Dr 32309-55-00023 4/1/2025 SWG2016-00064 was an approved design. The septic tanks were installed but owner did not have funds to complete. He terraced part of the area of the drainfield, push fill over the proposed drainfield area. We are going to remove the fill and get back the original soil and install and X02 to an Oscar drainfield. The reserve will be moved to another location. The existing pump tank will be retrofitted with a divider to accommodate the X02 discharge tank requirements. TJ Goos installed the original tanks and will be installing the proposed X02. i 'fhehe south end of the drainfield will be excavated 14"and the north end of the system will be excavated 12". This allows 15" of vertical separation. i� i' I Cindy W �G'G. / OF Y+hsy, 1� e/ lf G LICENSED DESIGNER ,0/ z.. 1. sba.MIMA LX1'iItES JSllL A Pp o V�Li A MASON COO h R Z 4 2025 E,40O,yMENT RET AL yEALTw 3 I , C 149G N Colony Surf Dr, Lilliwaup, WA 98665, USA, West Mason Township, Parcel Id: 323095500023 ril I 1, t 19°) ''''''.'''T ..- ' . �' -i/ 11 % I I— w / i., \....................0:::::::: 1 i t‘� ` i' ,, • ,to:s,,,,, -1, 4 ,i \ .....:j ...... . , \ / Q s : `s1, C , t Ot —e-f% r / tP ` �� 5100418„i( FAO, t �y f, DESIGNER �/ .! %.RI‘/2 49' �"� MASONCOUINnEh `1ir2025 Gl.ol , R r AL HEALTH 1 • I I r ' SL3 , ' 1 tl _ la, ^^ • to,..vig1 U ei i I1 o • ' 1 o H r ii it 1 r 5�/ 1 _ , , 1 !:, e ,i , , --...... , (v , " -......_ \ . . , . --...... : - __ \ 1. RV cover 3i.7 ,t' i . X2 treatment tank. Discharge tank qi/. Audio/visual alarm )4\. Clean out ' ; 6. 1" supply and return line ,,``* 7. Primary drainfield , 2v, i 1-/a ' 1 Lu' ► 8. Reserve drainfield urs t" 7/ 9. Waterline ,',k 10.Water hook up _ �__-- Scale => 1 in : 20 ft • BASAL WIDTH i p Imo\ rtsA v ` I cn o 2 r -, ,� +N. , = (.40 ........ .• IItil = Z L J d a 1. N ` iAPPROVEC , . �r APR242025 �' MASON COUNTY ENVIRONMENTAL HEALTH �� 1 Li RET �� tt s"y 9'� 1 P t..3 iiii:,),Aj : ,W0IC1N tn rD D * 1j X02 Tanks I2/3 1/3 • I L. i 'i,-' Gallon i..r_•.' :Gallon ••aroa. J _ •--— 1/3 i� :�11 M - 1 . .• ' :' . # 2 i Treatment t.,• ��� Discharge tank - , / %'. ,t S, 11, . EXIT 1, of)1 1"i 1 / /V'"e'J 411 Illustration 1 '�P a`' 1'' `�) 1 J' - 5,0(41 ,j ' 1 LICENSED DESIGNER 41. �r V i J.«, CA 'at,• LX.'I LS U,'(i The OSCAR-X02 treatment system is comprised of two technologies: the X02(4 chambers: septic, aeration, clarifier, and pump chambers) and the OSCAR: drip tubing coils, C-33 sand, manual flush or reverse flush headworks (X02M-kit, manual headworks orX02 reverse flush headworks), and control equipment. Wastewater is collected in the septic chamber where gross solids are separated. The waste stream is then aerated in the aeration chamber. Aerated effluent passes through the clarifier then into the pump chamber. The expected waste strength from the X02 will be 30 mg/I CBOD5 and 5 mg/I TSS. Effluent is dosed through a 120 mesh disc filter to OSCAR coils, installed in ASTM C-33 sand. Effluent discharged from the coils is treated by the sand prior to infiltrating into the receiving soil. The treatment level in the final discharge is expected to 1 APPROVED I� APR 2 4 2025 MASON COUNTY ENVIRONMENTAL HEALTH RET X,- Headworks: There are two options for headworks with the OSCAR-X02 system. The original X02 kit has the automatic reverse flush headworks while the new version, X02M has a manual headworks (see appendix). There are no solenoid valves in the X02M kit. 2/3 1/3 2/3 , I 1/3 q - 4 ' Law--t4!..Z.:J ,! APPROVED TABLE 2 APR 2 4 2025 Hydraulic Layout MASON OOUNnE'v'VMRON.MENTAL HEALTH OS-50 coils • i Design Total # of Coils Dose Flush Excess Flow Coils Lats. •er lat. GPM GPM TDH . .. ' 240 4 4 1 1.4 7.8 50' 300 5 5 1 1.75 9.75 50' 360 �1 ' 3 2 2.1 6.2 50' 450 - 8 �� 4 2 2.8 9.2 50' 480 __ 8 F�e4 4 2 2.8 9.2 50' 600 49c9-:1 5 2 3.5 11.5 50' • c a 1-1r'-b 2.A1l r J v a %41 a TABLE 3 C/4. /,;^ C'N E WAITE Hydraulic Layout JI .11' E D DESIGNER A_ . OS-100 coils Design 'Total # of Coils Dose Flush Excess Flow Coils Lats. •er lat. GPM GPM TDH 240 2 2 1 1.4 4.6 50' 360 3 3 1 2.1 6.9 50' 480 4 4 1 2.8 9.2 50' 600 5 5 1 3.5 11.5 50' Table 1-2*** Design Septic Aeration Clarifier* Pump Aerators Suggest tank sizes** Flow _ Y 500 gpd 670 3301 330 670 1 1,000 gal. treatment, 1,000 gal. discharge i-- 750 gpd 1,000 ; 500 I 1,000 500 2 1,500 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 1,3201 2,680 4 3k& 1500 treatment&3k& 1500 discharge 2250 gpd 3,000 1,500 1,500 3,000 5 3k& 1500 treatment&3k&1500 discharge 3,000 gpd 4,000 j 2,000 2,000 4,000 6 use multiple tanks to meet volume needs I 3,500 gpd 4,700 I 2,310 I 2,310 4,700 7 use multiple tanks to meet volume needs *Minimum liquid volume needed. **Local health jurisdictions may require larger tank volumes. ***Table 1-2 is a quick reference guide. Aerator: For each 500 gpd design flow one aerator will be needed. Round up the design flow to the next 500 gpd value. For instance, a 600 gpd design flow will 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 mu.- slope toward diffusors. Aes r c concerns should be considered when placing the aerator box. Place the fr ra,e. away from house windows, doors, and areas where people tend to congr'�te, ,III h as patios areas and barbecues. /fie , ,r,,,p 1:x/A i„ _ ,, _ , �cAi WA EV , I 1' f PROVED MASON,OV COUNTY ENVIRONMENTAL HEALTH APR 24 2025 -i' I I RET � 1d APR 2 4 Z025 MASON coUNTyE , TABLE 4 REl ENTq�yEALTN , Minimum Shoulder Lengths OS-50 € Design Flow Minimum Shoulder Length in Feet XX 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 between coils is 6 inches. See illustration below for example of shoulder length. i TABLE 5 Minim Shoulder Lens s OS-100 Design Flow Minimum Shoulder 240 , ' 2 inches 360 21 , inches 480 28' 4 •ches 600 35' 5 in .es The dimension- in Table 5 represent the minimum re'uired length of the shoulder which include coils, spacing between coils, and should- . These lengths can be extended to match site conditions. Minimum shoulder sp.cing is 6 inches. See illustration below for example of shoulder length. Basal Area: The basal area is comprised of the total area where th -33 d media is li in contact with the receiving soil. The minimum required b aria'' alculated 4�s y by dividing the design flow rate by the soil loading rate sp e�4j "�, 46-272A (local codes may have differing loading rates). �." N„-! s� Lp51 '4,p IN'. AITE IC ED DESIGNER 480 gpd MIN.SHOULDER LENGTH O - ' CNwCrYfN.' Headworks, reverse flush: HWN-.7-RF • 3/4 inches Arkal disc filter, mesh, 130 micron • 3/4 inches Arad flow meter • Three oil filled pressure gauges (0-100 psi) • 5 Netafim normally closed solenoid valves (Model 80) - • ED �w APPROVED © APR 2 4 2025 MASON COUNTY ENVIRONMENTAL HEALTH RET Headworks, manual flush: HWN-.7-man • 3/ inches Arkal disc filter, mesh, 130 micron • 3/4 inches Arad flow meter • Three oil filled pressure gauges (0-100 psi) • One 1 inch Spears gate valve for flushing. �� Of Notts,, q�l 5 oats 1D1'E AIT / � 11 r 004 UC NSED D IG Eppf� OSCAR-XO2 Parts list (500 gpd). Each OSCAR-X02 unit will include: • LF1P-RF-ARA control panel • LOT-30, 1/2 hp, 120 volt pump • Hi-Blow Aerator, HB-80 (80 liter/minute) • Hi-Blow diffusers • OS-50 or OS-100 Coils • PVC fittings and drip tubing adapters • HWN-.7-RF automatic headworks • Solid '/z inches poly tubing for connections • 2 float switches OSCAR-X02M Parts list (500 gpd). Each OSCAR-X02 unit will include: • LF1 P-RF-ARA control panel • LOT-30, 1/2 hp, 120 volt pump • Hi-Blow Aerator, HB-80 (80 liter/minute) • Hi-Blow diffusers • OS-50 or 05-100 Coils • PVC fittings and drip tubing adapters • HWN-.7-RF-man • Solid 'h inches poly tubing for connections • 2 float switches OSCAR-X02 coil Connections pT-.; ` : 'ASONAPR IIIIN 2 D 7-4,-.;.. ,,Lirypc,, R • rm H rT ' ,h Manifolds and supply lines are 1 inches Sch 40 PVC P N d CINCY E WAITE LICENSI•G DESIGNER l'Fl.f.,i'.. --, •.-1r,'.`-('' • .•,* .'-' 7.--et +V.`, 't-,.P,,,,:' •-, ', .', ,,,'..i.•- :,- ...t,:,'-'.2f.',..; %:"" • !,,'..%;,;2'4-' ' ;',,, '; -;‘;' I:a ': .:,it-;;,,i('.1 '.eN..• ', r. ,.4,.-,, . . .`'',;,‘ -'', f•: ,:',.„*"Aly.:;n y 4tr, ., /.•-•••.' -.,,,‘• • ,, , '-: ,f,•. .;',,.., P ),/. ,,,, : '', • , ,: ', ''..,' ''.• ek; ,:it..... . ilUV,,`13,',„. '-'s'.1' : * . ,:,,''..'',. .1. 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',;.,* •_'4'14;?' ;:,',;,.•::(01,;Vt., • `?' "+1Q..r )" ''Z../!''r.:2'..:/,,-• • ;:, r1,- y 4., •..f ' • 2.,..1,,"_±1,, ,O. 41* ,Ve.4.4.••1 t',5•.' "a: - Blank tech liner and Bioline connection with internal coupling ,•4 0 Ss, -57 •<.'j;r., ( <ei 510344‘k •-•i",.. Inspection ports. ''''' L 1 c cE NI NsDEYDE DESIGNERwAITE '''' f_AoiRES 0,10 "...."--- Screw Type Cap:P' Pr APR REF:ki2v1R 4°0N2Y°V2E 5NTE 1). ..E____ 4 PVC Pipe .SON COU: „Screw Type Cap 1._______< or,.Slip Cap - or Slip CaP 14,4 AL HEALT, (Length RET <—4" PVC Pipe Varies) (Length 1/4 x 4" Long Varies) \4- <Slot.st 0(4ii)etliRi9n0g* Apart krV `•-•....... , 4" PVC Tee •+ram' OSCAR Cover Options. 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 (<10% 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 3 1r 18 5 p C E WAIT I N ED LxvirtiS APPROVED APR 2 4 2025 tt �� MASON COUNTY ENVIRONMENTAL HEALTH 13 \ RET • Installation Notes Oscar-X02 Treatment System 1490 N Colony Surf Dr 32309-55-00023 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. Installer responsible to contact designer prior to installation. 3. 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. 4. Oscar drainfield: ASTM C-33 sand media as per Washington Department of Health's Recommended Standards and Guidance for Intermittent Sand Filter. 5. Minimum of 6" of sand throughout out the lateral(coil) area, must be level. 6. Oscar X02 parts list on Page 10 7. Controls to be set per X02 guidelines 8. Septic tank location must meet all required setbacks. 9. Keep wheeled vehicles off the drainfield area before, during and after installation. 10. Tracked equipment only 11. ,All ground, surface water and roof drains must be diverted away from the septic tanks and drainfield. 12. 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 13. Curtain drains can be no closer than 10' upgradient and 30' down gradient of the drainfield 14. Exposed restrictive layers, cuts, banks, etc. can be no closer than 50' downhill from the drainfield. 15. Install access risers on all tanks, valve box and ends of laterals. 16. Make sure septic tank risers are epoxied or caulked to cast in riser rings on tank. 17. Lids must form a water and gas tight seal with the access risers. 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 is ninety gallons per bedroom per day. gPPROV D 4.„ "7 APR 2 4 2025MASONCOONn N sf5'1004 16- 1‘ P►VRTONMENTAL NEALTN WAITE gs.r, LICENSED DESIG R • 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. 6. 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. ii 8. 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. I APPROVED aP�TY 2 4 25 MASON COUN E), 4``� 0,4 VIROhMEzahtAL HEALTH 1 L„,... si�P nA RET "���� k, As ui 5' 1418 F WAITE 0 CINDv E ((yy��// LICENSC.)DESIGNER 1> 1