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Home My WebLink About20191946TCS ENGINEERING SERVICE 18630 Weld County Rd 1 Berthoud, Colorado 80513 Phone: 970-532-2431 Fax: 970-532-4070 August 1, 2018 TO: Bill Novell I Weld County Health Dept. FROM. Tom Strizki, T0S Engineering Service Inc_ SUBJECT: Design of OWTS system for a proposed 3 bedroom house and storage facility office at 14336 County Road 1, Longmont, Colorado To whom it may concern, This letter is regarding an OWTS design that is a new installation for an existing 3 bedroom home and new office space for a new storage facility at 14336 County Road 1, Longmont, Colorado_ A site inspection was performed on July 29Th 2018 of which the results are attached, Weather conditions were dry. One -8 foot X 4 foot test hole was dug in the proposed area for a new absorption field. The site on the East side of the property was chosen since it was the only area available suitable for the OWTS requirements. Site Conditions: The test site that was chosen is located on a relatively fiat elevation of the property which lies below grade from the house site_ Slope is estimated to be less than 1% grade in the area of the proposed absorption field. Soil conditions in the test pit consisted of sandy I sandy loam clay below 10" of topsoil with consistent Sandy Clay to the bottom of pit Due to the moderate to high clay concentration, soil was determined to be a type 4A soil with a percolation rate between 91-120 minutes per inch. No ground water was encountered in the test pit and no signs of a high water table were observed., The OWTS design for this residence is to be for a treatment level of TL1 and will be designed as an injected, Unlined Sand Filter bed design in accordance with the new Weld County Chapter 30 OWTS regulations effective 2-12-18. OWTS System Design: The existing house construction is a 3 bedroom residence, The old system for this house which currently lies on the East side of the property will be abandoned and replaced with this new system. In addition to the house, an new office building for storage facility will be constructed with one bathroom and 2 remote toilets will also be added to the system. The total estimated water usage is shown below: • 3 Bedroom House with estimated 6 person capacity : 75 GPD X 6= 450 GPD • Office Bathroom 7SGPD X1-=7SGPD • 2 Remote toilets with hand wash sink 30 GPD X 2= 70 GPD • Total estimated GPD= 595 GPD Estimated size of Bed filter for soil type and estimated water usage is as follows: 595 gallons/day L15 gallons/do ! s• care foot LTAR = 3 967 s• ft. Because we are using a pressure dosed system, the sizing factor is el and does not change the area of the absorption field, however, because chambers are also being used in this design, an additional reduction factor of .7 can be applied, obtaining a design number of 2,780 square foot of bed filter needed for the design of the field. A size of 30 feet wide by 100 feet long will be used in this design. Using this design criteria, the absorption design will use 1-1/2" SCH 40 PVC pipe inside of infiltrator chambers to disperse the effluent. For the 3 bedroom house with one washer and one garbage disposal, the office bathroom, and the 2 remote toilets, I am specifying a 3 chamber concrete tank with a capacity of 1,000 gallons in the 1st chamber, 500 gallons in the second chamber, and 500 gallons for the lift station chamber, for a total of 200O gallons. The house will be piped to the septic tank using a minimum 4" diameter PVC pipe at a slope between 1/8 to 1/4 inch per foot if gravity fed. It is recommended that the standard "Quick 4 infiltrators" chambers be used to house the 1-1/2" pressure distribution pipe_ For this application a total of 120 infiltrators are required. It is recommended that 5 distribution rows be used in the absorption field. Each distribution row will be 96 feet long and placed on 6 foot centers, with the edge distribution pipes 3 feet from the edge of the bed (see attached drawing). Each trench is to 6 feet apart from wall to wall. Total dimensions of the absorption/I leach field will be approximately 30 feet wide X 100 feet long. Bed should be dug at a depth of 4'-6" inches, with the bottom of the bed level. 3 feet of filtered sand is to be placed in the bottom of the bed and then the pressure pipe and infiltrator chamber placed on top. Surrounding soil is suitable for backfill and no special fill in required. No rocks larger than 1" in diameter should be used for the backfill of the field, although no rock was encountered during the site inspection. This should allow approximately 6" of top cover above the pipe chambers. System is designed assuming 3 doses per day. With this design, the dosing pump size must be between a minimum 112 to HP pump capable of 30 to 40 GPM_ The hole size in the PVC pipe in the chambers should be 1/4 inch spaced on 5 ft. centers drilled at the 6 o'clock position (downward). An effluent filter is recommended to help prevent clogging of the lateral holes. Follow all installation instructions for bed preparation to install the infiltrator chambers properly (see attached reference material). Also, follow Weld County and regulation 43 guidelines for installation of a septic system regarding slope and grade of system and ground cover over leach field. Absorption field should be placed a minimum of 50 feet away from any domestic water source piped to the property. If there are any questions, please contact my office at the above number. Sincerely, Tom Strizki Colorado Registered Professional Engineers 30989. „cc,. otr- *ore SITE PLAN FOR PROJECT - it 3 ao44YYW -i- 41r -a4 4s s' It lizattit I a �,rlrt `f t It Wei I _. -Tr— "1 tail Oat tin PIIMS.101ILIti HIM * �11t1 �� ®lrllli Li r OMEllis.Of. 'St clan, t iil,tlitEti t ag inteldtill LAW. 1��.Oi1G�r.t 1 IWO JSS tint Ifs 44111r3 it itiL:::. jai 'T "I �! 1 t.#d,i atita k aaln iitail ctt;tflirt! lat.tlf e! Lo c utih$ a * L LN *ti gat siass■ mpoisi isistuasti wi p! ter:***1SIIetI 1MlE,II ngirt mr1 I 1 3. ;t JaP ar wim I IIN( b 4 141 isaitsry sow $:CH; Mat MIS rot �t i A 4 PROPOSED LAYOUT FOR NEW OWTS SYSTEM 1 • a • • • �, r f• j .� 4 . • :Minis. row • • +r . r. • C v tin r r • r , •, 4. -. ih ' .4 1. • 3y • y . , 4 J - se. _ I ,' ;1 _I IS* KAY COCCI -74100#0111:..fi X41# visanuoaccat WPRA Mr" 1611 trart44 M pref.??rt sr r. .14.'"7'';r r t_e ate. d- • Ti. .f A V,iter r % t eij Y• T I ' .ew 0aY'daB-9C�:�iiaa tto1,101 TAW 1 0 011 711H ,__r.-a.r_..,- .. .. trelarman- _ K'7'.!* Th* Brim '.h.iE 'iF( r`tatr..-m. ate• 4.•u '--- 1L 4 . t: Mra WAIL f#i7�a Dina J i xt i FL4X)L 2000 Gal. Three Compartment Electric Lift Septic Tank Total Capacity: 2000 gallons • Monolithic tank meets ATM- -1227 Spec. for water and waste- water structures. • Butyl rubber sealant meets Fed_ Spec. S- -210A. (Provided with tank) • See pages 35 - 41 for pumps and controls. (Sealed baffle wall. N' Install effluent filter at this location. 2' x 1' Modified riser 1J -box float tree bracket) SECTION PLAN Inlet f 4" Push Seal Gasket typical IEffluent pump (sized per specification) / remote alarm box, float tree, control and alarm switches installed and pump plumbed to stub -out including preassembled pipes and fittings. Connections to electri- cal source by others. jiai ti 551$ 17-8" I r r r -�_a- all a r �� 1 rie f d rM1/25—,r_ 1i r or f FLT r 'Interior space adequate for duplex pump installation — .' e-Lor-- i Outlet r ` alb 2" Cast -A -Seal Gasket typical Station Chamber (gallons) Discharge ,' Per Cycle t Approximate Weights Part it CapacitiesLift (gallons) A B Tank Lid 1 Baffle Walls Total P A-099+269 1,000 500 500 Variable 10.5 Gala 'Vertical 1 Inch 11,690 lbs 5,145 lbs 2,220 lbs 19x055 lbs I Note: N. ES. FLAYis Watertight / I t Front Range Precast Concrete, Inc. 5901 Dexter Street, Unit 200, Commerce City, CO 80022 Phone (303) 442-3207 a (800) 783-3207 • Fax (303) 442-3209 vvww.tlxx.corn ••56- Materials and Equipment Needed I Quick4 Plus chambers ❑ Quick4 Plus All -In -One 12 Endcaps ❑ PVC pipe and couplings Q Backhoe Laser, transit or level ❑ Shovel and rake ❑ Tape measure ❑ Screwdriver or utility knife ❑ Hole saw 2 -inch drywall screws" Screw gun" • • ■ ❑ Small valve -cover box* 4 -inch cap for inspection port' `Optional ■ These guidelines for construction machinery must be followed during installation. ❑ Avoid direct contact with chambers when using construction equipment. Chambers require a 12 -inch minimum of compacted cover to support a wheel load rating of 16,000 lbs/axle or equivalent to an A SHlO H-10 load rating. ❑ Only drive across the trenches when necessary_ Never drive down the length of the trenches. To avoid additional soil compaction, never drive heavy vehicles over the completed system. r EXCAVATING AND PREPARING THE SITE NOTE: As is the case with conventional systems, do not install the systems in wet conditions or in overly moist soils, as this causes machinery to smear the soil. 1. Stake out location of trenches and lines. Set elevations of the tank, pipe, and trench bottom. 2. install sedimentation and erosion control measures. Temporary drainage swales/ berms may be installed to protect the site during rainfall events. 3. Excavate and level -foot-wide trenches with proper center -to -center separation. Verify trenches are level or have pre- scribed slope. NOTE: Over excavate the trench width in areas where you are planning to contour. 44 Rake bottom and sides if smearing has occurred while excavating. Remove any large stones and other debris. Do not use the bucket teeth to rake the trench bottom. 5. Verify that each trench is level using a level, transit, or laser. PREPARING THE QUICK4 PLUS ALL -IN -ONE 12 ENDCAPS NOTE: The Quick4 Plus All -in -One 12 Endcap is compatible with the Quick4 Plus Standard and Quick4 Plus High Capacity chambers, and can be used on either end of the trench, depending upon the installer's preference and configuration requirements. 414 With a hole saw drill a 41/2 -inch opening INFILTRATOR' water technologies Quick4 Plus Standard and Quick4 Plus High Capacity installation Instructions 0uick4 Plus Standard and 0uick4 Plus High Capacitychambers may only be installed according to State andtor local regulations. If unsure of the installation requirements for a particular site, contact the local health department. Like conventional systems, the soil and site conditions must be approved prior to installation. Conduct a thorough site evaluation to determine the proper sizing and siting of the system before installation. 0uick4 Plus Standard L ^� 3 [ } r[) ill rf tk "; L��;o r ti),�rri r. f•i'r�lti'vv.&i'Liw J�t1!�iirf lei irk a NA Ta L1 �� 1� .1 Oil rJ Aw rf £� Tr* a r 4� i r a il r ia . 752,0411•241 r r t z t -Ai ik, /a frig, iltz l `i I•a ask f� �t aale `3 IM e 48" EFFECTIVE LENGTH 0uick4 Plus High Capacity EFFECTIVE LENGTH on front or side of endcap using center point marking (see illustration) as a guide. t _ Grid endcap QUICK4 PLUS ALL -IN - ONE 12 ENDCAP DRILL LOCATIONS: ENO OR SIDE 9' INVERT (GR 'ATY INLET lR OUTLET} r PRESSURE LATERAL(TYR) 2' PR.ESSLIHE LATERAL (TYP.) -TOP 12.r INVERTS (INLET OR OUTLETI the first chamber. Be sure to line up the locking pins on the top of both the chamber and endcap_ 5. Insert the inlet pipe 2.5 inches into the opening on the endcap. 5 25' INVERT 6. Lift and place GMilne INLET Oft OL'7LEI) the end of the ENI] OKi EIDE4.f5' INVERT (FOR min-L'rJECoNNEGTIOrJ next chamber ORtOOPEC ENOS) 2. Snap off the molded splash plate locat- ed on the bottom front of the endcap. 3. Install splash plate into the appropriate slots below inlet to prevent trench bottom erosion. INSTALLING THE SYSTEM 1. Check the header pipe to be sure it is level or has the prescribed slope. , Set the invert height as specified in the design from the bottom of the inlet. . Place the first chamber in the trench. 4> Place the back edge of the endcap over the inlet end of 4. Place endcap inlet end. onto the previ- ous chamber by holding it at a 45 -degree angle_ Line up the chamber end between the connector hook and locking pin at the top of the first chamber. Lower the cham- ber to the ground to connect the chambers, NOTE; When the chamber end is placed between the connector hook and locking pin at a 45 -degree angle, the pin will be visible from the back side of the chamber fi NOTE: The connector hook serves as a guide to ensure proper connection and does not add structural integrity to chamber joint. Broken hooks will not affect } the structure or void the warranty. 5, insert inlet pipe_ 6_ Connect chambers. Contact infiltrator Water Technologies 1-800-221-436 for additional technical and product information_ 7. Swivel the chamber on the pin to achieve the proper direc- tion for trench layout. NOTE: The chamber allows up to 10 -degree swivel in either direction at each joint. 8. Continue connecting chambers until the trench is completed. NOTE: As chambers are installed, verify they are level or have the prescribed slope. 9. The last chamber in the trench requires an endcap. Lift the endcap at a 45 -degree angle and align the connector hook on the top of the chamber with the raised slot on the top of the endcap. Lower the end - cap to the ground and into place. NOTE: Place a few shovels of soil around the endcap to secure it during back -fill. 10. To ensure structural stability, fill the sidewall area by pulling soil from the sides of the trench with a shovel. Start at the joints where the chambers connect. Continue backfilling the entire sidewall area, making sure the fill covers the lou- vers. 11. Pack down fill by walking along the edges of trench and chambers. NOTE: In wet or clay soils, do not walk in the sidewalls. 12. Proceed to the next trench and begin with Step 1. 1. Swivel chambers. 9. Place endcap outlet end. INSTALLING OUICK4 PLUS ALL -IN -ONE 12 ENDCAPS AS A MID -LINE CONNECTION 1. With a hole saw drill an opening appro- priate for the pipe diameter being used on the side (3.3" invert) or on top (9,0" invert) of endeap. NOTE: Piping configurations are deter - INFILTRATOR water technologies mined by the preference of the installer or designer. 2. With a hole saw, drill a 41/2 -inch opening on the end of the 0uick4 Plus All -in -One 12 Endcap to cre- ate an invert at 0.5 inches. This will allow efflu- ent to fill both sides of the chamber line. 3. Snap off the molded splash i L plate located on :the bottom front of the endcap_ 4. Install splash plate into the appropriate slots below the inlet to prevent trench bottom erosion. 5. Place the back edge of the endcap over the inlet end of the first chamber. Be sure to line up the locking pins on the top of both chamber and endcap. 6. Insert connection pipe 2.5 inches into opening on endcap. 1. Drill endcap on side or top. 2. Drill endcap on end 6. insert cannedion pipe. INSTALLING INSPECTION PORTS Inspection ports may be installed on each of the chamber tops or on top of the 0uick4 Plus All -in -One 12 Endcap. Endcap Inspection Port 1. With a hole saw drill the pre -marked area in the top of the chamber or end cap to create an open- ing based on pipe type. NOTE: Drill a 41/2 -inch opening on the 0uick4 Plus High Capacity 4 Business Park Road P.J.CBox 768 Old Saybrook, CT 06475 86O-577 70G0 • Fax 86O-577-7OO1 1-800-221-4436 Immo. i of i l tratacwater. cam 1. Drill encicap on top_ chamber and All -in -One Endcap to accommodate a 4 -inch Schedule 40 pipe_ Drill a 2112 -inch opening on the 0uick4 Plus Standard chamber to i accommodate a 2 -inch Schedule 40 pipe. 2. Set a cut piece of pipe of the appropri- ate length into the corresponding endcap's inspection port sleeve. 3, Use two screws to fasten the pipe to the sleeve around the inspection port_ 4. Attach a threaded cap or cleanout assembly onto the protruding pipe at the appropriate height. 5. A small valve cover box may be used if the inspection port is below the desired grade_ 2. Pipe #n endcap inspection part_ COVERING THE SYSTEM Before backfilling, the syslem must be inspected by a health officer or other official as required by State and local codes. Create an as -built drawing at this time for future records. 1. Backfill the trench by pushing fill material over the chambers with a back - hoe. Keep a minimum of 12 inches of compacted cover over the chambers before driving over the system. NOTE: Do not drive over system while backfilling in sand. NOTE: For shallow cover applications, you must mound 12 inches of soil over the system before driving over it, and then grade it back to 6 inches upon completion. 2. It is best to mound several inches of soil over the finish grade to allow for settling. This also ensures that runoff water is diverted away from the system. 3. After the system is covered, the site should be seeded or sodded to prevent erosion. NOTE: If the system is for new home construction, it is important to leave marking stakes along the boundary of the system, This will show contractors where the site is located so they will not cross it with equipment or vehicles. Infiltrator Water Technologies Limited Warranty Available at: wvx'v intiliraiorwater,com or cat 1-800-2 21-4436 U.S. Patents: 4.759.661; 5,017.041 ; 5.156.486; 5.336,017: 5.401.116; 5.401.459; 5..511.903: .5.716. 63: .t,586.778;.t.639,1344 Canadian Patents: 1,329,959; 2.004,564 Other patents pending. Infiltrator, Equalizer. Quick4, and SideWander are registered trademarks of infiltrator Water Technologies. infiltrator is a reel.stered trademark in France Infiltrator Water Technologies is a registered trademark in IVlexic.o. Contour. Microi.eaching, PolyTutf, CnarrioerSpacer, MultiPort, Possiock, QulckCuf, QulckPiay, SnapLock aria Str.algrtLock are trademarks of Infiltrator Water Tecnoiogles. Poiyiok Is a trademark of PolyLoi , ins. TUF-TITE is a ragi iereti tradervark of r OF-TITh, INC. Ultra -Rib is a trademark of IPD( Inc. C 2013 infiltrator Water Technologies, LLC. All rights reserved. Printed in U.S.A. PLUS0S 1.1131S1 Contact Infiltrator Water Technologies' Technical Services Department for assistance at 1-800-221-4436 WAS SUM TION SWAM pan 2i) Mil aft Cfirs. rarmitti Vey «- natant tai aTat citatrAlricallia ta1W R it sexist it ion it "ratty, lad' tactrtirty .jitt imialip nazis ta Sign a* re snit +www o' 1_': 4— tr f *' its • ?S r�-vs- --•. .vL4 y a - f,8 •' r i rid rick. .� t , .ar a. SAME OF ULTIM PANEL Ai =ORDER Ines II a SLUM= HIM i in lint at or- ,,a. i p. C a:l.fii TI — 1YW..\�i��Aw..-._.. E. - a O N s Fr d:azatitara- . at aille 41. WMItS 0 K2 & go. 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IM D liall MS l A.," sus 4 MIONIC t 3n iti• +�iw,7 �1C 4�.. Ip L. tei 12 i YIE =WM 31511:141 �-.. 0 IMO MID! moo t rm. t: ciwitte; DIV* t-35MULD ansamstosasiter sia"...-+-•-r, a LONGS PEAK WATER DISTRICT • P • • • • • • • • • • • • • ! • • • • 9875 Vermillion Road • Longmont, CO 80504 • (30 3) 776-3847 office • (303) 776-0198 fd x March ?3, 2018 MNR11Jr.C' 85() South Main Street Longmont, CO 8(0501 Attn: William Novell Re: Commitment I,etter Request 14336 Weld County Road 1 o Whom hom 1t May Concern: This letter is to conlirlli that the property located in the Southwest / of Section 19, 1 nship 3N, Range 68W in Weld County, otherwise known as 14336 Weld County Road, I .ongmont, CD is located entirely within the boundary of the Longs Peak Water District, and Hong. Peak is the provider of domestic water service. It is our understanding that the proposed development may need fire flow thr the intended use. Fire flow capacity r% ill need to he discussed to determine what, if any of f= -site infrastructure rastructure ma. he needed to provide adequate flow ibr firefighting needs. f` you have further questions. please contact me. Best Regards, Gary Allen General Manager- Hello