HomeMy WebLinkAboutOWTS System Designl(+rtÍrnE & lssocldÞs, k."Geotec{rnical and Materials Engircersand Environmental Scienlisb5020 County Road 154Glenwood Springs, CO 81601phone: (970) 945-7988fax: (970) 945-8454email : kaglenwood@kumarusa.comAn Employcc ()lrnod compony www.kumarusa.comOffice Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, ColoradoONSITE WASTEWATER TREATMBNT SYSTEM DESIGNEXISTING RESIDENCELOT 12, PEACH VALLEY ACRES3726 COUNTY ROAD 214GARFIELD COUNTY, COLORADOPROJECT NO.21-7-290APRIL 8,202LPREPARED FOR:JT]DI A}[D RICHARD ROSS3726 COI]NTY ROAD 214srLT, coLoRADO 81652@
TABLE OF CONTENTSINTRODUCTIONPROPOSED CONSTRUCTIONSITE CONDITIONSSUBSURFACE CONDITIONSO\MTS ANALYSIS ...DESIGN RECOMMENDATIONSSOIL TREATMENT AREA...OWTS COMPONENTSOV/TS OPERATION AND MAINTENANCEOV/TS HOUSEHOLD OPERATION .................OWTS MAINTENANCE......OWTS CONSTRUCTION OBSERVATIONLIMITATIONSFIGURESFIGURE 1 _ OWTS SITE PLANFIGURE 2 _ USDA GRADATION TEST RESULTSFIGURE 3 _ SOIL TREATMENT AREA CALCULATIONSFIGURE 4 _ SOIL TREATMENT AREA PLAN VIEWFIGURE 5 _ SOIL TREATMENT AREA CROSS SECTIONATTACHMENTSVALLEY PRECAST I,OOO GALLON, TWO-CHAMBER SEPTIC TANK DETAILTUF-TITE 4.HOLE DISTRIBUTION BOX-1--l-1-1-2-JJ4777-8-8-Kumar & Associates, lnc.Pro¡ect No.2l-7-290
INTRODUCTIONThis report provides the results of an onsite wastewater treatrrent system (OWTS) design for theexisting residence located on Lot l2,PeachValley Acres, 3726 Cotxfiy Road 214, GarfìeldCounty, Colorado. The purpose of the report is to provide design details for the O\I/TS inaccordance with the Garfield County Environmental Health Department Onsite WastewaterTreatment System Regulations and the Colorado Department of Public Health andEnvironrrental Regulation#43. The services were performed in accordance with our agreementfor professional services to Judi and Richard Ross dated March 22,202I.PROPOSED CONSTRUCTIONThe existing residence is a single-family structure located on the lot as shown on Figwe 1. Theresidence has three bedrooms. The existing OWTS has apparentþ failed and will be replaced.The OWTS will be designed for atotal of three bedrooms. The proposed soil treatment area(STA) for the OWTS will be located to the east of the residence as shown on Figure l. Waterservice is provided by a shared source from the Peach Lane to the west of the residence.If proposed construction is different than that described, we should be contacted to re-evaluateour design recommendations.SITE COI\DITIONSThe site is occupied by a single family, one-story residence, a bam and a small shed, seeFigure 1. The terrain is relatively flat and gently sloping down to the southeast. The currentSTA is located in the lawn area to the southeast of the residence and to the southwest of the newSTA location. Vegetation consists of lawn and mature trees.SUBST]RFACE CONDITIONSThe field exploration for the OWTS was conducted on March 25,2021. Two profile pits (ProfilePits 1 and2) were excavated with an excavator at the approximate locations shown on Figure 1to evaluate the subsurface conditions for the planned new soil treatment area for the OS/TS' Thepits were logged by a representative of Kumar & Associates. Logs of the profile pits areprovided below.Kumar & Associates, lnc.Project No.21-7-290
TOPSOIL; organic Loam, firm, moist, dark brown.0-Y2'LOAM; weak blocþstructure, stiff to very stiff, slightþ moist, grayish brown.Yzo-8'oaoDisturbed bulk sample obtainedfrom 4 to 5 feet.Bottom of pit @ I feet.observed at time of pit excavation.No sroundwater or redoximorPhicnLog of Profile Pit 1Log of Profile Pit 2The soils encountered in profile pits, below about Yzfeetof organic topsoil, consisted of Loamdown to the pit depths of I feet. Hydrometer and gradation analyses were performed on adisturbed bulk sample of the soils from Profile Pit 1 from 4 to 5 feet depth with the resultsprovided on Figure 2. Thetested sample (minus No.10 size sieve fraction) classifies as Loamper the USDA system. No free water was encountered in the pits nor indications of seasonalhigh groundwater were observed at the time of the pit excavations.Based on the subsurface conditions and laboratory testing, the soils at the STA have beenclassified as Type 2A per State regulations, which equates to a long-term acceptance rate(LTAR) of 0.50 gallons per sqruìre foot per day.OWTS ANALYSISBased on the site conditions and profile pit evaluations, the evaluated area should be suitable fora conventional infiltration disposal system. There is adequate elevation difference from theground floor of the residence down to the STA for gravity flow of the se\iler effluent. The STAwill consist of chambers in a trench configuration based in the Loam soils. The STA will besized for three bedrooms (six persons) and an average daily flow of 75 gallons per person, and anLTAR of 0.50 gallons per square foot per day for the natural Loam soils.The effluent will gravity flow from the residence to a septic tank for primary treatrnent and thengravity flow to the STA for dispersal and final treatrnent. The STA will consist of three trencheswith Infiltator Quick 4 Plus Standard chambers. Equal distribution will be provided to thechambers and üenches by a distribution box.LOAM; weak blocþ structure, stiff, moist, grayish brown.TOPSOIL; organicLoam, firm, moist, dark brown.aaor redoximorphic features observed at time of pit excavøtion'No groundwaterBottom of pit @ 9feet.0-Yz'Yz'-8'Kumar & Associates, lnc.Project No.21-7-290
-J-We understand it is desired to use the existing septic tank as part of the new system. V/e believethe existing tank to be 1,000-gallon size. An inspection of the existing tank should be performedby a licensed inspector. If the tank if found to be an inadequate size or condition, a new tankshould be used. The condition of the existing sewer pipe should also be evaluated and replacedif needed.There are no known water supply lines in the vicinity of the proposed STA. The requiredsetback to the water supply line from the septic tank is 10 feet, 5 feet for sewer and effluent lines,and25 feet from the STA. We should be notified for additional recommendations if the watersupply line is within these minimum setbacks.DESIGN RECOMMENDATIONSThe design recommendations presented below are based on the proposed construction, the siteand subsurface conditions encountered and ow experience in the area. A layout ofthe proposedOWTS components is provided on Figure 1. If conditions encountered dwing construction aredifferent than those that are described in this report, we should be contacted to re-evaluate ourdesign recommendations.SOIL TREATMENT AREAo The STA will consist of three fienches with 18 lnfiltrator Quick 4 Plus Standardchambers placed in each trench (54 chambers total) in the native soils. Equal distributionwill be provided to the trenches by a distribution box.o The STA was sized based on an LTAR of 0.50 gallons per square feet per day.. Each chamber was allowed 12 square feet of area. A30% reduction of the STA size wasapplied for use of Infiltrator chambers in a trench configuration. The total STA designsize is 648 square feet. Soil ffeatment area calculations are shown on Figrne 3.o A minimum of four feet of undisturbed soil between trenches is required.o Trench cut depths should be a maximum of 4 feet deep.o The trenches should be oriented along ground contours to minimize soil cut and cover.r The base and sidewalls of the trench excavations should be scarified prior to the chamberplacement.o A minimum of 12 inches and a maximum of 36 inches of cover soil should be placedover the chambers.o Bacldll should be graded to deflect surface water away from the STA and should besloped at 3 horizontal to 1 vertical or flatter. A swale to divert surface water flow awayfrom the STA may be needed along the upslope side.Kumar & Associates, lnc.Pro¡ect No.2l-7-290
-4-Disturbed soil should be re-vegetated as soon as possible with a native grass mix. Notrees, shrubs or other plants with deep roots should be planted on or near the STA as thismay damage the system piping.Four-inch diameter inspection ports should be installed vertically into the knockoutsprovided in the chamber end caps. Inst¿ll ports at each end of the trench. The inspectíonport piping should be screwed into the top to the chambers and should not extend down tothe ground surface inside the chambers. The inspection ports should extend at least8 inches above the finished ground surface or be protected in a valve box at finishedgrade.The STA must be a minimum of 25 feet from any potable water supply lines.The STA must be a minimum of l0 feet from any slab-on-grade structures, such as thebarn.A plan view of the STA is presented on Figure 4 and a cross section of the STA ispresented on Figure 5.OV/TS COMPONENTSRecommended OV/TS components provided below are based on our design details and ourexperience with the specific component manufacturers. Equivalent components may be feasiblebut need to be approved by us prior to construction.Septic Tanko A 1,000 gallon, two-cha:nber septic tank should be used for primary treatment. Theexisting tank should be evaluated at the time of installation of the new OWTS. Ifreplacement is necessary, a Valley Precast 1,000 gallon, two-chamber septic tank shouldbe used. A detail of the tank is provided as an attachment.o An effluent fìlter should be installed in the tank outlet tee.o The tank must be a minimum of 5 feet from the residence.. The tank must be a minimum of 10 feet from any potable water supply lines.o The tank must be set level. The excavation bottom must be free of large rocks or otherobjects that could damage the tank during placement. A road base or gravel beddingmaterial may be needed to prevent tank damage during placement and act as a levelingcoulse.o The tank lids must extend to final surface grade and made to be easily located.o Install the tank with 2 feet minimum cover soil for frost protection. Maximum tank soilcover is 4 feet.o If replaced, the existing septic tank should be abandoned per Garfield County regulations.aaaaaKumar & Associates, lnc.Proiêct No.21-7-290
-5-Sewer Pipe. The location and condition of the existing sewer line to the tank should be evaluated atthe time of construction and replaced if needed.o The sewer line to the septic tank should not be less than the diameter of the buildingdrains and not less than 4 inches in diameter.r The sewer pipe should have a rating of SDR35 or stronger. Schedule 40 PVC pipe isrequired beneath any driveway surfaces.o The sewer pipe should be sloped between 2%oto 4Yoto help limit disturbance of solids inthe tank and potential sewage bypass of the first chamber of the tank. If a steeper slope isneeded, this can be accomplished with vertical step-downs in the sewer line.o A minimum 24 inches of cover soil should be provided over the sewer pipe. Paved ateas,patios or other areas without vegetative cover may be more susceptible to frost and werecommend 48 inches of soil cover over the sewer pipe in these areas, and the pipe beinsulated on top and sides with 2-inch-thick blue foam insulation board. If adequate soilcover is not possible, we should be contacted for re-evaluation prior to installation.o The sewer pipe should be bedded in compacted%-nchroad base or native soils providedthat the native soils contain no angular rocks or rocks larger than2% inches in diameterto help prevent settlement of the pipe. Sags in the pipe could cause standing effluent tofreeze and damage the piping.o Install cleanout pipes within 5 feet of the building foundation, tühere the sewer pipesbend 90 degrees or more and every 100 feet of sewer pipe.o All 90-degree bends should be installed using a 90-degree long-sweep or by using two45-degree elbows.o The sewer line location shown on Figure I is considered conceptual. We assume thatthere will be only one sewer line exiting the residence. It is the responsibility of theowner/contractors to locate all sewer line exit locations and connections to the septictank. V/e should be notified if there are other sewer lines exiting the building.EfTluent Transport Piping. The effluenttransport pipe should be 4-inch diameter SDR35 piping sloped ataTo/ominimum to flow from the septic tank to the distribution box and from the distributionbox to each trench. Piping should extend at least 6 inches into the top knockout providedin the Infiltrator end caps and be screwed in place. Splash plates should be installedbeneath the inlet piping to help limit scouring of the infiltrative soìl surface in thechambers.Kumar & Associates, lnc.Project No.21-7-290
-6-The effluent transport pipe should be bedded in compacted%-nchroad base or nativesoils provided ttrat the native soils contain no angular rocks or rocks larger than2/zinches in diameter to hetp prevent settlement of the pipe. Sags could cause standingeffluent to freeze and damage to the piping.A minimum 18 inches of cover soil should be provided over the effluent transport pipe.Paved areas, patios or other areas without vegetative cover may be more susceptible tofrost. V/e recommend 48 inches of soil cover over the effluent pipe and insulation with atleast 2 inches of rigid foam insulation in these areas. If adequate cover soil is notpossible, we should re-evaluate the condition prior to installation.Schedule 40 PVC pipe is required underneath driveway surfaces and should be providedwith at least 48 inches of soil cover, and be insulated on top and sides with 2-inch-thickrigid foam insulation board.4119O-degree bends should be installed using a 90 degree long-sweep or by using two45-degree elbows.Distribution Boxo The distribution box will be used to equally divide effluent flow between the trenches.We recommend the Tuf-Tite 4-Hole Distribution Box since it is easily accessible fromground surface for maintenance. A copy of the distribution box detail is provided as anattachment to this rePort.c The distribution box outlet pipes should be equipped with Tuf-Tite speed levelers þr easeof initial setup and adiustment over time.o The distribution box should be a minimum of 18 inches below grade with risers and anaccess lid at or above grade.o The distribution box must be accessible from ground surface for inspection andmaintenance per the State guidelines.r The effluent line from the septic tank should be directed downward into the distributionbox with a 90-degree elbow inside the box.o The distribution box must be installed level on a compacted road base subgrade to ensureequal effluent distribution. If settlement of the distribution box occurs, unequal effluentdistribution may take place which could cause hydraulic overload of one of the trenchesand potential failure. The distribution box should be monitored periodically, and thespeed levelers should be adjusted as necessary for leveling.o The ground surf,ace above and around the distribution box should be graded to drain awaysurface water to prevent standing water near the distribution box which could freeze orcause settlement.oaaKumar & Associates, lnc.Project No.21-7-290
-7 -O}VTS OPERATION AI\ID MAINTENANCEThe OV/TS will require periodic inspection and maintenance to function properþ. A properþdesigned, installed and maintained system can greatþ increase its lifespan. The level ofmaintenance will vary depending on the complexity of the system and water use habits of theresidents. 'We recommend that an OWTS Operation and Maintenance (O&M) Manual bedeveloped. Depending on the complexity of the system, a contract with an OWTS maintenanceprovider may be prudent. Below are some basic recommendations for the OWTS O&M.OWTS HOUSEHOLD OPERATIONo Use of high efficiency water fixtures is recommended to decrease the hydraulic load onthe OWTS system.. Fix plumbing leaks immediately as this may cause ahydraulic overload of the soilabsorption system.o Do not irrigate the area on top of or directþ upgradient of the soil absorption field as thismay cause a hydraulic overload.¡ Do not dispose of household waste down drains as this may clog or damage OV/TScomponents. Examples of household waste includes: dental floss, cotton swabs, coffeegrounds, paper towels, feminine products and many other kitchen and bath items.o Use of kitchen garbage disposals is not recommended. If a garbage disposal is utilized,kitchen wastewater should be screened thoroughly. Many kitchen solids are notdecomposed in the septic tank and may cause increased tank pumping frequency.o Do not dispose of household chemicals, greases, oils, paints, hot tub water or watersoftener backwash in household drains. A separate drywell, if feasible, may be necessaryfor hot tub water or water softener backwash disposal.o Limit the use of bleach as this may harm usefi,rl bacteria in the septic tank and soilabsorption system.o Liquid dishwasher and clothes washer detergent is recommended for households servedby an OWTS. Clay substances used as fillers in powder detergents may result inclogging of the soils absorption system.OWTS MAINTENANCEInspect the septic tank, distribution box and STA at least annually for problems or signsof failure.The effluent filter for the tank should be cleaned at least annually by spray washing solidsinto the frst chamber of the septic tank.The septic tank should be pumped and cleaned every 3 to 5 years depending on use.oOoKumar & Associates, lnc.Projec{ No.21-7-290
-8-Longer pumping intervals may increase the amount of solids that reach the STA, whichmay shorten its life span.Pumping of the septic t¿nk should take place when the level of the sludge and scumlayers combined take up 25 ta 33Yo of the capacþ of the first chamber of the tank.OWTS CONSTRT]CTION OBSERVATIONThe Garfield County Environmental Health Departrnent requires that the designer of the systemprovide a record drawing and certification of the OV/TS construction (As-Built inspection).\Me should be provided with at least 48-hour notice prior to the installer needing the inspections.Prior to issuance of ow certification letter, we require observation of all system componentsprior to backfill. The number of site visits required for the inspection will depend on theinstaller's construction schedule. V/e should be provided the tank inspection report prior to orat the time of our inspection.LIMITATIONSWe have conducted this design in accordance with generally accepted engineering principles andpractices in this areaatthis time. We make no warranty either expressed or implied. Therecommendations provided in this report are based on the site conditions, profile pit evaluationsand soil texture analysis, the proposed construction and otn experience in the area. Variations inthe subsurface conditions may not become evident until excavation is performed. If conditionsenconntered dwing construction appear different from those described in this report, we shouldbe notified so that re-evaluation of the recommendations may be made.This report has been prepared for the exclusive use by our client for design pulposes. Vy'e are notresponsible for technical interpretations by others of our infonnation. As the project evolves, weshould provide continued consultation and field services during construction to review andmonitor the implementation of our recommendations, and to verify that the recommendationshave been appropriately interpreted. Significant design changes may require additional analysisor modifications to our design.It is our opinion that the designed location of the OWTS components does not violate anysetback requirements of the current Garfield County Regulations. Below is a table of commonminimum horizontal setbacks to OVITS components. Refer to the Garfïeld Corurty Regulationsfor a complete list of required setbacks. We recommend the OWTS component locations besurveyed by a Professional Colorado Land Surveyor.oKumar & Associates, lnc.Project No.21-7-290
-9-Table 1- Common Minimum llorizontal Setbacks from OWTSPlease contact us for any necessary revisions or discussion after review of this re,port by EagleCounty. If you have any questions, or if we may be of furttrer assistanceo please lçt us know.Respectftrlly Submitted,Kumar & Associates, Inc.øffiShane M. Mello, StaffEngineerReviewedDavid A. Young,SMM/kacSepticTank5'25',10'10'DryDitchorGulchLake,IrrigationDitch,Stream50'50'50'10'10'10'LinedDitchOccupiedDwelling20'5'0'WaterSupplyLine25',10'5'50'Wells100'50'STASeptic TankBuildingSewerKumar & Associates, lnc.Project No.21.7.290
PEACH LANEt-EXISTING,OOO GALLON,SEPTIC TANK,t-Hot-EB0xPROFILEPIT 1PROFILEPIT 2SOIL ÏREAAREA (SrA)3 ROWS OFnüCONSISTING OFlE INFILTRATOR QUICK4PLUS STANDARD CHAMBERS(s4 cHAMBERS rorAl)./3726 COUNTY ROAD 2/4R*SCALE_FEETFig. 1OWTS SITE PLANKumar & Associates21-7-290
Fis. 2USDA GRADATION TEST RESULTSKumar & Associates20-7-290COAFSE+-----+-----_--_____--+-_______+_MEDIUM-------+-------GRAVËLFINEv. co.co.MEDIUMFINESANDV. FINÊSIEVE ANALYSISco-+-SILTFINEHYDROI'EIER ANALYSISIIEË100toto70loso¡ao5020toot0zo3o4:¡oao7080¡ot002EEËË0OF PARTICLÊS IN MICtAYCOBBLES.llll2 mmI 2mmSAMPLE OF: LOAMFRoM: PROFILE PIT I AT 4 ÏO 5 FEETENTIRE SAIIPLEPARÎICLE SIZE DISTRIBUTION Ío0¡úa3517coBBI.E:;GRAYELSANDSILTCLAYFORTION OFPASSTNG #1SAMPLE0SIEVEPARTICLE SIZE DISTRIBUTION fß35t7SANDSILTCI.AYTOTAL SAIIPLE RETAIIIED ON fl0 SIEVE: 0fPERCENT OF I¡ATERIAL REruNED ON IlO SIEVEPASSING 5,/¡[' SIEYE: ¡1/ANOTE: llydromclcr Anolyrls yot p€rform.d on obulk romplc followlng rcrucnlng of oll molcrlollorg€r thûn thc fl0 rlcvc (2.0 mm) per USDAguldcllner.Thm H nrulls qÞply only lo thrEmpl.¡ rh¡ch rcn i!¡hd. Th.t6tln9 nport rholl nol br nprcducrd,uopt ln tull, tfihoul lh. rtllt nopprwol of Kumqr & A$oclotr¡, lnc,S1m onolt:lr t ûl¡ng l¡ p.rfom.d lnqoæidono. rlth ASn{ D422, ÀgÎy Cl58ond/or ASII¡ Dlltl¡l.Í FINER100too100toot(X)100t00loo99e67as2SIEI/E SIZE5'1-1 t2-3/1'3/A'&ttotf8t35t601110t325GRAIN SIZE(m-)127.OO76.0058.f0r 9.059.501.752.001.000.50o.250.f060.0¡15f FINER5013292317t3TIME PASSED(mln)I1t960¡t55ls¡tsGRAIN SIZE(mm)0.0570.0190.0090.0050.0020.001
OWTS SOIL TREATMENT AREA CATCULATIONSIn accordance with the Ga¡fþH County OWTS Regulatbns and the Cobrado Depatment of Public Healthand Environmert's Regulatbn #43, the solltreatment area was cahulated as folows:CALCULATION OF OWTS DESIGN FIOW:Q = (FXN)N = 2 PERSONS PER BEDROOMWHERE:Q = DESIGN FLOWF = AVERAGE FLOW PER PERSON PER DAYB = NUMBER OF BEDROOMSN = NUMBER OF PERSONSL_t-$=[\=Q=75 GALLONS PER DAY3 BEDROOMS6 PERSONS450 GALLONSPERDAYCALCULATION OF OWTS SOIL TREATMENT AREA:MINIUMUM TREATMENT AREA = Q + LTARWHERE:Q=LTAR (SOIL WPE 2A¡ =450 GALLONSPERDAY0.5 GALLONS/FTTDAYMINIMUM SOIL TREATMENT AREA =9OO.O SQUARE FEETREDUCTION FACTOR FOR CHAMBERS =0.70MTNIMUM SOIL TREATMENT AREA WTTH REDUCTION =630 SQUAREFEETAREA PER INFILTRATOR QUICK 4 STANDARD CHAMBER =TOTAL CHAMBERS NEEDED =12 SQUARE FEET53 CHAMBERSNUMBER OF TRENCHES =CHAMBERS PERTRENCH =TOTAL NUMBER OF CHAMBERS AS DESIGNED =3 TRENCHES18 CHAMBERS54 CHAMBERSTOTAL SOIL TREATMENTAREA =648 SQUAREFEETFig. 3SOIL TREATMENT AREA CALCULATIONSKumar & Associates21-7-290
Fig. 4SOIL TREATMENT AREA PLAN VIEWKumar & Associates21 -7 -290TUF.TITEDISTRIBUTIONBOX4 INCH DIAMETERNON-PERFORATEDSDR35 TRANSPORTPIPE SLOPED ATA 2% MIN. DOWNTO DISTRIBUTIONBOX.INCH DIAMETERNON-PERFORATEDSDR35 TRANSPORÏPIPE SLOPED ATA 2?6 MIN. DOWNTO TRENCH.TRANSPORT PIPING SHOULD BEINSERTED AT LEAST 6 INCHESINTO THE UPPER KNOCKOUT INTHE END CAP. INSTALL SPLATES BENEATH INLET PIPING1O HELP LIMIT SCOURING OF THEINFILTRATIVE SURFACE.4 INCH DIAMETER PVC OBSERVATION PORTSINSTALLED VERTICALLY INTO THE KNOCKOUTSPROVIDED IN END CAPS. INSTALL PORTS ATEACH END OF EACH TRENCH. REMOVABLELID TO BE PLACED ON TOP OF PIPE. PIPEMUST STICK UP AT LEAST 8 INCHES ABOVEFINISHED GRADE OR BE PLACED AT GRADE INAN ACCESSIBLE VALVE BOX. PIPES SHOULDNOT EXTEND TO SOIL SURFACE AND SHOULDBE SECURED TO CHAMBER WITH SCREWS ORCOUPLINGS TO PREVENT SLIDING DOWNWARD.êU6Ê)tsã2Þ¿--tINFILTRATOR QUICK4 PLUSSTANDARD CHAMBERS IN 3TRENCHES. I8 CI{AMBERSPER TRENCH (s4 TOTAL).INFILTRATOR QUICK4 PLUS STANDARDEND CAP.SCALE_FEETNotes:1. Chambers should be installed level on a scarified ground surface. Concrete sand may be used as a leveling course ifnecessary.2. Care should be taken by the contractor to avoid compaction of the native soils in the trench areas. The base and side walls oftrench excavations should be scarified prior to chamber installation.3. All piping should have a rating of SDR35 or stronger.4. Changes to this design should not be made without consultation and approval by Kumar & Associates-5. Refer to the 2018 Garfield County Onsite Wastewater System Regulations for other applicable specifications.o!gozÞÉF2uuÈo
Fig. 5SOIL TREATMENT AREA CROSS SECTIONKumar & Associates21-7-290lnfiltrator Quick 4 PlusStandard Chamberlnstalled LevelExcavate 36"Wide Trench12" min. 24" max.Cover Soil Gradedto Deflect SurfaceWaterApprox. Existing Ground SurtaceScarify ground surface priorto chamber placement.Notes1Chambers should be installed level on a scarified ground surface. Concretesand may be used as a leveling course if necessary.Care should be taken by the contractor to avoid compaction of the native soìls inthe trench areas. The base and side walls of trench excavations should bescarified prior to chamber installation.Changes to this design should not be made without consultation and approvalby Kumar & Associates.2.20 2.5SCALE-FEET3SoilBetweenNative Soil
Phon¡: ?lg¡¡0t6iaittfFæ 719€05.ÍI7:tzfrþ¡h www.yile¡prod.dnErnil:cIOOO Gallon Top Sealn - zCPlûür tlo0nlt¿cp11TopViewDESIGN NOTESr Design per performonce test perAS'Til C1227f"-'.r¡-iir Top surfoce oreo 46.25 ft¿r fc O 2E doys; concrete = 6,000 PSIMin.lnstollotion:¡ Tonk to be set on 5' mln. sondbed or peo grovel¡ Tonk to be bockfilled unlformly onqll sldes in llfts less thon 24: ondmechonlcolly compocted¡ Excovqted mqterlol moy be used forbockfill, provided lorge stones oreremorcd¡ Excovotion should be dewotered ondtqnk fllled with woter prior to belngput in service for lnstollotlon wlthwoter toble less thon 2' below grodeo Mests C164¡l-06 for resilientconnectorsr lnlet ond Outlet identified obove pipe¡ Dellvered complete wlth lnternolplplngo 4' Moxlmum bury depth.¡'ör¡ ffll<;ID.r'_¿r-Il. r.bGrarþFle¡dbleR¡bborS€hnt6l¡'5lt'SectionView, Dlgging SpecslnrærtDimenslons , Net CopocityNet Weight11' Long x 7' Wide lnlet OutletLength : Width , Height lnlet Side lOutletTotolL¡dTonkTotol56" below lnlet 56' 55'111'60"69"6E7 gol ; 523 gol,1010 gol2620 lbs :9380 lbs r12O00 tbs ,ALLOWABLE BURY(Bosed on Woter Toble)ALLOWÀtsLEFARTI'I FII I2'-0.3'- 0'3'- O'4-0'c-o'WATER TABI.E0'- 0'1'- 0'2'-c.3'- 0'DRY1I.I1
Iit::IITT"&TUT4D¡striTough ProblemPrcviding a simple, rdiable, andpemanent mêans for dividing septictank effluent flow'TUF-TITE SolutionA strcng, stable, pêmanent,non-corosive Tuf-Îte DistributionBox, wiü aTuf-Tte Speed Levelø¡n each outlet.I lnjection molded HDPEI Non-corrosiveI Simple to installI Easy to levelln a septic environment, no othermaterialcan match High DensityPolyethlene in delivering a lifetimeof trouble-free service. Tuf-TteDistribution Boxes are injectionmolded, using only premium HDPEwhich contains no fillers or foam.Snap-in pipe sealsThey're patented. Simply insert yourPVC pipe and push it through theflexible, polyethylene Tuf-Tite seal.Pipes fit watertight. lnstallation couldn'tbe easier-They'rc permanentUnlike cement-based pipe grout,Tuf-Tite seals will not crack or corrodein septic conditions. They stay pliableand watertight permanently.
S.¡lOP.10INSTALI.ATION ISJUSTTHISSIMPLEl. Position the Distribution Boxon levelvirgin soil.Do not place box on aconcrcte slab.2. lnstallthe inlet pipe andoutlet pipes. Be sure thebottoms of all pipes rest onvirgin soil.3. Levelthe Distribution Boxand all pipes as needed.4. Backfillthe pipes to withintwo feet of the DistributionBox. Recheck the level of thebox, then backfill up to thetop lid ridge.5. lnstall and adjust Tuf-TiteSpeed Levelers.6. Place lid on the DistributionBox and finish backfilling.Drainage and Septic ProducÈsT¡¡ú-flteP Corporaüoni200 Flex CourtLake Zurich, lllinois 60047Choice of FittingsS€5 Pipe Seal, for:I Sewerand DrainrsDR3s rASTM3034IThinWall r 15ülb.CrwhS-40 Pipe Seal, fø:I Súedule4014" CorugatedP-10 Plug, for unused holesChoice of LidsRegular Ud. Molded of ruggedI.{DPE.lnspection Port Lid. For eâsyaccess and inspection. Modelsavailable to accept either 4" or6" extension pipæ.Ti¡f-Tito Speed LevglersrtContol the flow of effluent fromñe Distribution Box. Simplyinsert a Speed Leveler into eachoutlet pipe. Rotrate each SpeedLeveler so the flow is distributedas desircd. Available for 3' or 4"PVG pipe.IüAfulllìneofinnwafuteforb€tlÞrsspdcsl8terns"' .Tllt'TITE"@1 999 Tuf-Tï6@ CorporatonFom 4HD2-9. ftint€d ln USA