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HomeMy WebLinkAboutEngineer's OWTS Design Planl(tnmfimm#d'-" An Employcc Owncd Compony 5020 County Road 154 Glenwood Springs, CO 81601 phone: (970) 945-7988 fax: (970) 945-8454 email: kaglenwood@kumarusa.com www.kumarusa.com Office Locatons: Denver (HQ), Parker, Cobrado Springs, Fort Collins, Glenwsod Springs, and Summit County, Colorado ONSITE WASTEWATER TREATMENT SYSTEM DESIGN PROPOSED RESIDENCE LOT 3, FTLTNG 3, MTNEOTA ESTATES TBD MINEOTA DRIVE GARFIELD COUNTY, COLORADO PROJECT NO.22-7-l2l ocToBER 3,2022 PREPARED FOR: JOSE H. SALINAS P. O. BOX 1799 GLENWOOD SPRINGS, COLORADO 81652 @) TABLE OF CONTENTS INTRODUCTION. PROPOSED CONSTRUCTION SITE CONDITIONS........... SUBSURFACE CONDITIONS OWTS ANALYSIS DESIGN RECOMMENDATIONS SOIL TREATMENT AREA...... owTS coMPoNENTS ............ OWTS OPERATION AND MAINTENANCE....... OWTS HOUSEHOLD OPERATION OWTS MAINTENANCE.... OWTS CONSTRUCTION OBSERVATION LIMITATIONS FIGURES FIGURE 1 _ OWTS SITE PLAN FIGURE 2 _ USDA GRADATION TEST RESULTS FIGURE 3 _ SOIL TREATMENT AREA CALCULATIONS FIGURE 4 _ SOIL TREATMENT AREA PLAN VIEW FIGURE 5 _ SOIL TREATMENT AREA CROSS SECTION ATTACHMENTS VALLEY PRECAST I,OOO GALLON, TWO-CHAMBER SEPTIC TANK DETAIL TUF-TITE 4-HOLE DISTRIBUTION BOX I I -1- _)- .......- 2 .......- 3 .......- 3 6 6 7 ...-7 - -7 - Kumar & Aesociates, lnc.Prcject No.22-7-121 INTRODUCTION This report provides the results of an onsite wastewater treatment system (OWTS) design for the proposed residence to be located on Lot 3, Filing 3, Mineota Ridge Estates, address TBD Mineota Drive, Garfield County, Colorado. The purpose of the report is to provide design details for the OWTS in accordance with the Garfield County Environmental Health Department Onsite Wastewater Treatment System Regulations and the Colorado Department of Public Health and Environmental Regulation #43. The services were performed as part of our agreement for professional services to Jose H. Salinas dated January 14,2022- PROPOSED CONSTRUCTION The residence will be a single-family structure located on the lot as shown on Figure 1. The residence will have three bedrooms, and the OWTS will be designed for three bedrooms. The proposed soil treatment area (STA) for the OWTS will be located to the north of the residence as shown on Figure 1. Water for the residence will be provided from a public supply and route of the water supply line to the residence have not been designed at the time of this report. If proposed construction is different than that described, we should be contacted to re-evaluate our design recommendations. SITE CONDITIONS The property was vacant at the time of our site visit for the field exploration. The ground surface is covered with scattered grasses, weeds, and sage brush. The terrain is moderately to sloping down to the north. Steeper slopes are present further uphill to the north. SUBSURFACE CONDITIONS The field exploration for the OWTS was conducted on March 22,2022. Two profile pits (Profile Pits 1 and2) were excavated with a backhoe at the approximate locations shown on Figure I to evaluate the subsurface conditions at the planned soil treatment area for the OWTS. The pits were logged by a representative of Kumar & Associates. Logs of the profile pits are provided below. Log of Profile Pit 1 Depth USDA Classification 0-1'TOPSOL; organic Loam, firm, moist, brown. 7',-7',LOAM; moderately blocky structure, very stiff, slightly moist, light brown. a a a Disturbed bulk sample obtainedfrom 4 to 5 feet- Bottom of pil @ 7 feeL No sroundwater or redoximorphic features observed at time of pit excavation. Kumar & Associates, lnc.Project No.22-7-121 Depth USDA Classification 0-1'TOPSOL; organic Loam, firm, moist brown. 1'-8'LOAM; moderately blocky structure, very stiff, slightly mois! light brown. a a Bottom of pit @7feet. No sroundwater or redoximorphic features observed at time of pit excavation. -2- Log of Profile Pit 2 The soils encountered in profile pits, below about 1 feet of organic topsoil, consisted of Sandy Loam down to the explored pit depths of 7 and 8 feet. Hydrometer and gradation analyses were performed on a disturbed bulk sample of the soils from Profile Pit I from 4 to 5 feet depth with the results provided on Figure 2. The tested sample (minus No. 10 size sieve fraction) classifies as Loam per the USDA system. No free water was encountered in the pits nor indications of seasonal high groundwater were observed at the time of the pit excavations. Based on the subsurface conditions and laboratory testing, the soils at the STA have been classified as Type 2 per State regulations, which equates to a long-term acceptance rate (LTAR) of 0.60 gallons per square foot per day. OWTS ANALYSIS Based on the site conditions and profile pit evaluations, the evaluated area should be suitable for a conventional infiltration disposal system. The STA will consist of chambers in a trench configuration based in the Loam soils. The STA will be sized for three bedrooms (six persons) and an average daily flow of 75 gallons per person, and an LTAR of 0.60 gallons per square foot per day for the natural Loam soils. The effluent will gravity flow from the residence to the septic tank for primary treatment and then gravity flow to the STA for dispersal and final treatment. The STA will consist of two trenches with Infiltrator Quick 4 Plus Standard chambers. Equal distribution will be provided to the chambers and trenches by a distribution box. The route of the planned water supply line to the residence is currently not known. The required setback of the water line from the septic tank is 10 feet, 5 feet for sewer and effluent lines, and 25 feetfrom the STA. We should be notified for additional recommendations if any part of the OWTS is within these minimum setbacks. DESIGN RECOMMENDATIONS The design recommendations presented below are based on the proposed construction, the site and subsurface conditions encountered and our experience in the area. A layout ofthe proposed OWTS components is provided on Figure 1. If conditions encountered during construction are different than those that are described in this report, we should be contacted to re-evaluate our design recommendations. Kumar & Associates, lnc.Project No.22-7-121 -J- SOIL TREATMENT AREA o The STA will consist of two trenches with22Infiltrator Quick 4 Plus Standard chambers placed in each trench (44 chambers total) in the native soils. Equal distribution will be provided to the trenches by a distribution box. o The STA was sized based on an LTAR of 0.60 gallons per square feet per day. . Each chamber was allowed 12 square feet of area. A30% reduction of the STA size was applied for use of Infiltrator chambers in a trench configuration. The total STA design size is 528 square feet. Soil treatment area calculations are shown on Figure 3. o A minimum of four feet of undisturbed soil between the trenches is required. e The trench cut depths should be a maximum of 3 feet- o The trenches should be oriented along ground contours to minimize soil cut and cover. o The base and sidewalls of the trench excavations should be scarified prior to the chamber placement. o A minimum of 12 inches and a maximum of 24 inches of cover soil should be placed over the chambers. o Backfill should be graded to deflect surface water away from the STA and should be sloped at 3 horizontal to 1 vertical or flatter. A swale to divert surface water flow away from the STA may be needed along the upslope side. o Disturbed soil should be re-vegetated as soon as possible with a native grass mix. No trees, shrubs or other plants with deep roots should be planted on or near the STA as this may damage the system piPing. o Four-inch diameter inspection ports should be installed vertically into the knockouts provided in the chamber end caps. Install ports at each end of the trench. The inspection port piping should be screwed into the top to the chambers and should not extend down to the ground surface inside the chambers. The inspection ports should extend at least 8 inches above the finished ground surface or be protected in a valve box at finished grade. o The STA must be a minimum of 5 feet from the septic tank. o The STA must be a minimum of 25 feet from any potable water supply lines. o The STA must be a minimum of 20 feet from the residence. o The STA must be a minimum of 100 feet from any well or spring. o A plan view of the STA is presented on Figure 4 and a cross section of the STA is presented on Figure 5. OWTS COMPONENTS Recommended OWTS components provided below are based on our design details and our experience with the specific component manufacturers. Equivalent components may be feasible but need to be approved by us prior to construction. Kumar & Associatet, lnc.Project No.22-7-121 -4- Septic Tank o A Valley Precast 1,000 gallon, two-chamber septic tank should be used for primary treatment and dosing to the STA. A detail of the tank is provided as an attachment. o An efTluent filter should be installed in the tank outlet tee. o The tank must be a minimum of 5 feet from the residence. o The tank must be a minimum of l0 feet from any potable water supply lines. o The tank must be a minimum of 50 feet from any well or spring. o The tank must be set level. The excavation bottom must be free of large rocks or other objects that could damage the tank during placement. A road base or gravel bedding material may be needed to prevent tank damage during placement and act as a leveling course. 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 soil cover is 4 feet. Sewer Pipe o The sewer line to the septic tank should not be less than the diameter of the building drains and not less than 4 inches in diameter' o The sewer pipe should have a rating of SDR35 or stronger. Schedule 40 PVC pipe is required beneath any driveway surfaces. o The sewer pipe should be sloped between ZYoto 4o/oto help limit disturbance of solids in the tank and potential sewage bypass of the first chamber of the tank. If a steeper slope is needed, 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 areas, patios or other areas without vegetative cover may be more susceptible to frost and we recommend 48 inches of soil cover over the sewer pipe in these areas, and the pipe be insulated on top and sides with 2-inch-thick blue foam insulation board. If adequate soil cover is not possible, we should be contacted for re-evaluation prior to installation. o The sewer pipe should be bedded in compactedt/o-inch road base or native soils provided that the native soils contain no angular rocks or rocks larger than 2Yz-inches in diameter to help prevent settlement of the pipe. Sags in the pipe could cause standing effluent to freeze and damage the piping. o Install cleanout pipes within 5 feet of the building foundation, where the sewer pipe bends 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 two 45-degree elbows. o The sewer line location shown on Figure 1 is considered conceptual. We assume that there will be only one sewer line exiting the residence. It is the responsibility of the Kumar & Associates, lnc.Projec{ No.22-7-121 5 owner/contractors to locate all sewer line exit locations and connections to the septic tank. We should be notified if there are other sewer lines exiting the building. Effluent Transport Piping o The effluent transport pipe should be 4-inch diameter SDR35 piping sloped at a2o/o minimum to flow from the septic tank to the distribution box and from the distribution box to each trench. Piping should extend at least 6 inches into the top knockout provided in the Infiltrator end caps and be screwed in place. Splash plates should be installed beneath the inlet piping to help limit scouring of the infiltrative soil surface in the chambers. o The effluent transport pipe should be bedded in compacted3k-inch road base or native soils provided that the native soils contain no angular rocks or rocks larger than 2/zinches in diameter to help prevent settlement of the pipe. Sags could cause standing effluent to freeze and damage to the piping. o 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 to frost. We recommend 48 inches of soil cover over the effluent pipe and insulation with at least2 inches of rigid foam insulation in these areas. If adequate cover soil is not possible, we should re-evaluate the condition prior to installation- r Schedule 40 PVC pipe is required underneath driveway surfaces and should be provided with at least 48 inches of soil cover, and be insulated on top and sides with 2-inch-thick rigid foam insulation board. o All 90-degree bends should be installed using a 90 degree long-sweep or by using two 45-degree elbows. Distribution Box o 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 from ground surface for maintenance. A copy of the distribution box detail is provided as an attachment to this rePort. o The distribution box outlet pipes should be equipped with Tuf-Tite speed levelers for ease of initial setup and adiustment over time. o The distribution box should be a minimum of 18 inches below grade with risers and an access lid at or above grade. o The distribution box must be accessible from gtound surface for inspection and maintenance per the State guidelines. o The effluent line from the septic tank should be directed downward into the distribution box with a 9O-degree elbow inside the box. Kumar & Associates, lnc.Project No.22-l-121 -6- o The distribution box must be installed level on a compacted road base subgrade to ensure equal effluent distribution. If settlement of the distribution box occurs, unequal effluent distribution may take place which could cause hydraulic overload of one of the trenches and potential failure. The distribution box should be monitored periodically, and the speed levelers should be adjusted as necessary for levelling. The ground surface above and around the distribution box should be graded to drain away surface water to prevent standing water near the distribution box which could freeze or cause settlement. o OWTS OPERATION AND MAINTENANCE The OWTS will require periodic inspection and maintenance to function properly. A properly designed, installed and maintained system can greatly increase its lifespan. The level of maintenance will vary depending on the complexity of the system and water use habits of the residents. We recommend that an OWTS Operation and Maintenance (O&M) Manual be developed. Depending on the complexity of the system, a contract with an OWTS maintenance provider may be prudent. Below are some basic recommendations for the OWTS O&M. OWTS HOUSEHOLD OPERATTON o Use of high efficiency water fixtures is recommended to decrease the hydraulic load on the OWTS system. o Fix plumbing leaks immediately as this may cause a hydraulic overload of the soil absorption system. o Do not irrigate the area on top of or directly upgradient of the soil absorption field as this may cause a hydraulic overload. o Do not dispose of household waste down drains as this may clog or damage OWTS components. Examples of household waste includes: dental floss, cotton swabs, coffee grounds, 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 not decomposed 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 water softener backwash in household drains. A separate drywell, if feasible, may be necessary for hot tub water or water softener backwash disposal' o Limit the use of bleach as this may harm useful bacteria in the septic tank and soil absorption system. o Liquid dishwasher and clothes washer detergent is recommended for households served by an OWTS. Clay substances used as fillers in powder detergents may result in clogging of the soils absorption system. Kumar & Associates, lnc.Project No.22-T-121 -7- The effluent in septic tanks can freeze during extended periods of non-use in cold weather. OWTS MAINTENANCE o Inspect the septic tank, distribution box and STA at least annually for problems or signs of failure. o The effluent filter for the tank should be cleaned at least annually by spray washing solids into the first chamber of the septic tank. o The septic tank should be pumped and cleaned every 3 to 5 years depending on use. Longer pumping intervals may increase the amount of solids that reach the STA, which may shorten its life span. . Pumping of the septic tank should take place when the level of the sludge and scum layers combined take up 25 to 33Vo of the capacity of the first chamber of the tank. OWTS CONSTRUCTION OBSERVATION The Garfield County Environmental Health Department requires that the designer of the system provide a record drawing and certification of the OWTS construction (As-Built inspection). We should be provided with at least 48-hour notice prior to the installer needing the inspections. Prior to issuance of our certification letter, we require observation of all system components prior to backfill. The number of site visits required for the inspection will depend on the installer's construction schedule. LINIITATIONS We have conducted this design in accordance with generally accepted engineering principles and practices in this areaatthis time. We make no warranty either expressed or implied. The recommendations provided in this report are based on the site conditions, profile pit evaluations and soil texture analysis, the proposed construction and our experience in the area. Variations in the subsurface conditions may not become evident until excavation is performed. If conditions encountered during construction appear different from those described in this report, we should be 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 purposes. We are not responsible for technical interpretations by others of our information. As the project evolves, we should provide continued consultation and field services during construction to review and monitor the implementation of our recommendations, and to verif that the recommendations have been appropriately interpreted. Significant design changes may require additional analysis or modifications to our design. Kumar & Associateo, lnc.Prcjec{ No.22-7-121 -8- It is our opinion that the designed location of the OWTS components does not violate any setback requirernents of the curreirt Garfield County Regulations. Below is a table of common minimum hoiznntal setbacks to OWTS components. Referto the Garfield County Regulations for a complete list of required setbacks. We recommend the OWTS components be surveyed by a Professional Colorado Land Surveyor. Table 1 - Common Minimum Horizontal Setbacks from OWTS Please contact us for any necessary revisions or discussion after review of this report by Garfield County. If you have any questions, or if we may be of further assistance, please let us know. Respectfully Submiued, Kumar & Associates, Inc. ffift Shane M. Mello, StafrEngineer Rwiewed David A. Y Cc: J SMMftac Gonz.alez ( i o s e (gr i cal ib erco nstrugti on. corn ) Lake, Irrigation Ditch, Stream Dry Ditch or Gulch Septic TankWells Water Supply Line Occupied Dwelling Lined Ditch t525',20'10'50'25',100'STA 50'l0'50'l0',5 10'Septic Tank 5'0'l0'50'10'50'Building Sewer Kumar & Associates, lnc,Project No. 22-7-121 30.00' 60.oo' saPo 30.oo'7' 5608---- 5 Proposed 56li 561 Lot 3 -PROPOSED SOIL TREATMENT AREA 56J Mineota Ridge-(srA) coNSrsrNG oF 2 Rows 22 INFILTRATOR QUICK4 PLUS OF-...-614 STANDARD CHAMBERS. 44 TOTALEstatesCHAMBERS.Seis L4.L7 Acres t PROFILE PROFILE PIT 1 PIT 2 .\56/ 5qz-,1 561 PROPOSED VALLEY PROPOSED 561 PRECAST 1,000-GALLON, TWO-CHAMBER SEPTIC TANK TUFTTTE _ 4-HOLE DtsrRtBUTloN - er ^BOX WOCJ CLEANOUT 56e3 PROPOSED 3 BEDROOM RESIDENCE See< 56es SCALE_FEET Fig. 1OWTS SITE PLANKumar & Associates22-7 -121 ! E2u too eo a, 70 to 50 F ]il) 20 to o lo m :to 4 50 60 70 ao to t6 I E ts ff PARTICLES IN MILLIMETERS CI AY COBBLES mm .02 .ll5 .t SAMPLE OF: LOAM FROII: PROFILE PIT I AT 4 TO 5 FEST 1 2mm 5 m 76 ENTIRE SAMPLE PARTICLE SIZE DISTRIBUTION % COSBLES o GRAVEL 5 SAND /+t SILT 12 CLAY 11 PORTION OF SAI'PLE PASSTNG fl0 STEVE PARTICLE SIZE DISTRIBUTION X SAND 12 SILT /+:t CI.AY 11 TOTAL SAIIPLE RETAINED ON f,10 SIEVE: 3% PERCENT OF MATERIAL RETAINED ON #10 SIEVE PASSTNG 5,/4" SIEVE: 1OOX NOTE: Hydrometer Andlysls wds parlform€d on o bulk somple followlng 3creonlng of oll motorlol lorger lhon lhe fl0 sleve (2.0 mm) per USDA guldellnos. Thclc iGl ro&ll' qpply only to lh. &mplc! rhlch w.ro l.drd. Thc lldlng reporl lhqll noi b! roprcducrd, lxcrpl ln full. wllhoul lh. wrltlon qpprcvol of Kumor & Atloclotar, lnc. Sldc onqlFl. Hlng l' partom.d ln occoldonc! wllh ASTII D422, ASrH C156 ond/or ASTI. Dtl,(,. HYDROUE ER ANALYSIS SIEVE ANALYSIS u.s. $am snrE Clff WNE OENIrcNIE REAdXG6 I' HRS 7 HRS I rtrtr GMWLSILTSAND FINE MEDIUM co vco FINF MEDIIJM COARSEFINEm.V. FINE GRAIN SIZE(--)SIEVE SIZE X FINER 127.OO 5"100 76.00 t00 58.1 0 1-1 /2'loo 19.05 3h"100 9.50 3/8"99 1.75 l1 99 2.00 *10 97 1.00 t18 95 0.50 t55 92 o.25 t60 66 0.1 06 #140 70 0.055 ,270 55 CRAIN SIZE (mm) TIME PASSED (mln)X FINER 0.057 I 12 0.019 1 53 0.009 19 25 0.005 60 20 o.002 /t55 11 0.001 I 54tt 11 22-7-121 Kumar & Associates USDA GRADATION TEST RESULTS Fig. 2 OWTS SOil- .TREATMENT AREA CALCULATIO NS In accordance wlth the Garfeb County OWTS Regulatbns and the Cobrado Depaftment of Pubk Health and Environment's Regulat'pn #43, the soll treatment area was cabulated as folbtls: CALCULATION OF OWTS DESIGN FLOW: q = (F)(N) N = 2 PERSONS PER BEDROOM FOR FIRST 3 BEDROOMS WHERE: Q = DESIGN FLOW F = AVEMGE FLOW PER PERSON PER DAY B = NUMBER OF BEDROOMS N = NUMBER OF PERSONS f,= $= N- Q= 75 GALLONS PER DAY 3 BEDROOMS 6 PERSONS 45O GATTONSPERDAY GALCULATION OF OWTS SOIL TREATMFNT AREA: MINIUMUM TREATMENT AREA - Q + LTAR WHERE: Q= LTAR (SOIL TYPE 2) = 450 GALLONSPERDAY 0.6 GALLONS/FTTDAY MINIMUM SOIL TREATMENT AREA =750.0 SQUARE FEET 0.70 s25 SQUAREFEET REDUCTION FACTOR FOR CHAMBERS = MINIMUM SOIL TREATMENT AREA WITH REDUCTION = AREA PER INFILTMTOR QUICK 4 STANDARD CHAMBER = TOTAL CHAMBERS NEEDED = 12 SQUARE FEET ,+4 CHAMBERS NUMBER OF TRENCHES = CHAMBERSPERTRENCH = TOTAL NUMBER OF CHAMBERS AS DESIGNED = 2 TRENCHES 22 CHAMBERS 44 CHAMBERS TOTAT SOII TREATMENTAREA =528 SQUAREFEET 22-7*121 Kumar & Associates SOIL TREATMENT AREA CALCULATIONS Fig. 3 4 INCH DIAMETER PVC OBSERVATION PORTS INSTALLED VERTICALLY INTO THE KNOCKOUTS PROVIDED IN END CAPS. INSTALL PORTS AT EACH END OF EACH TRENCH. REMOVABLE LID TO BE PLACED ON TOP OF PIPE, PIPE MUST STICK UP AT LEAST 8 INCHES ABOVE FINISHED GRADE OR BE PLACED AT GRADE IN AN ACCESSIBLE VALVE BOX. PIPES SHOULD NOT EXTEND TO SOIL SURFACE AND SHOULD BE SECURED TO CHAMBER WITH SCREWS OR COUPLINGS TO PREVENT SLIDING DOWNWARD. 4 INCH DIAMETER NON*PERFORATED SDR55 TRANSPORT PIPE SLOPED A 2% MIN. DOWN TO TRENCH. BETVYE€N TRENCHES TUF_TITE DISTRIBUTION BOX INFILTRATOR QUICK4 PLUS STANDARD CHAMBERS IN 2 TRENCHES. 22 CHAMBERS PER TRENCH (44 TOTAL). TRANSPORT PIPING SHOULD BE INSERTED AT LEAST 6 INCHES INTO THE UPPER KNOCKOUT IN THE END CAP. INSTALL SPLASH PLATES BENEATH INLET PIPING TO HELP LIMIT SCOURING OF THE INFILTRATIVE SURFACE. INFILTRATOR QUICK4 PLUS STANDARD END CAP. 4 INCH DIAMETER NON_PERFORATED SDR55 TRANSPORT PIPE SLOPED AT A 2% MIN. DOWN TO DISTRIBUTION BOX. 1 1 SCALE-FEET Notes: 1. Chambers should be installed level on a scarified ground surface. Concrete sand may be used as a leveling course if necessary. 2. Care should be taken by the contractor to avoid compaction of the native soils in the trench areas. The base and side walls of trench excavations should be scarified prior to chamber installation. 3. All piping should have a rating ol SDF35 or stronger. 4. Changes to this design should not be made without consultation and approval by Kumar & Associates. 5. Refer to the Garfield County Onsite Wastewater System Regulations for other applicable specifications. { ITIN, UilDISfURBED 22-7 -121 Kumar & Associates SOIL TREATMENT AREA PLAN VIEW Fis. 4 Native SoilSoil Beiween T 12" min. 24" max. Cover Soil Graded to Deflect Surface Water Excavate 36" Wide Trench lnfiltrator Quick 4 Plus Standard Chamber lnstalled Level Approx. Existing Ground Surface Scarify ground surface prior to chamber placement. Notes: 1. Chambers should be installed level on a scarified ground surface. Concrete sand may be used as a leveling course if necessary. 2. Care should be taken by the contractor to avoid compaction of the native soils in the trench areas. The base and side walls oi trench excavations should be scarified prior to chamber installation. 3. Changes to this design should not be made without consultation and approval by Kumar & Associates. 2.5 0 SCALE-FEET 22-7-121 Kumar & Assqciates SO]L TREATMENT AREA CROSS STCTION Fig. 5 {OOO Gallon Top $ealn - 2CPItrln t IOOOI'.ZGP 11 '.--rr*i. r+iir'f .. Top View bGEde Sebnt Section Totol 12000 lbs ,l- :-J-3.DESGN NOTES. Dosign per performonce test PerAs'tlt c1227 r Top surfoce oreo 46.25 ftr r fc O 28 doys; concrete = 6,000 PSI Mln. lnstollotlon:o Tonk to bc set on 5' mln. sond bed or peo grovelr Tonk to be bockfllled unlformlY on oll sldes ln tlfts less thon 24' ond mechonicolly compoctedr Excovoted moteriol moy be used for bockfill, provided lorge stones ore remowdo Excovotion should be dewotered ond tonk filled with woter prior to being put ln servlce for lnetollotlon wlth woter toble less thon 2' below groder Meete C164/+-06 for reslllent connectorsr lnlet ond Outlet ldentlffed oborre plpe r Delivered complete wlth lntemol piping o f Moxlmum bury dcpth Digglng Specs 11' Long x 7' Wide 56* below inlet lnvert Net Copocity tl lnlet Sideioutlet j Totol 'i 687 gol r 523 gol;1010 gol-i il Clc i: ; TAIX IlDiir (r Flodble RtDbor 6i l" 51 5ri")' Net Welght View Dimensions I jOutlet , 53' lnlet Length 1 width 60" Height 6g" Lid 2620 lbs Tonk 9380 lbsI I ALLOWABLE BURY (Bosed on Woter Toble) WATER TABTE ALLQWAEL[. EARTH FILL o'-o'2'- O' 1'- 0'3'- O- 2'-0.J'- o' J'- 0'c-o' DRY 1-0. 1 If" Phonc: 719€95tilO{Fu 719€05€Zl Wob.lb: wrrw.dlqpecaeil.cnErnl[frontd@Bucne Vlrte, Colorado Mlrnc.