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Home My WebLink AboutOWTS Installation Observations 07.25.2023ffi CTL ITHOMPSONW July 25,2023 Osage, lnc. 913 Red Mountain Drive Glenwood Springs, CO 81601 OWTS - Final lnspection Letter Observation Date: June 20, 2023 Field Reps: Ryan R, Barbone, P.E. and Jesse Crisler Project Name: 565 Faranhyll Ranch Road (a.k.a. Parcel #4, Faranhyll Ranch) Project Number: GS06572.001 -l 32 Septic Permit No. SEPT159 We previously provided an OWTS design for the proposed residence and auxiliary dwelling unit (ADU) located at 565 Faranhyll Ranch Road (see Project No. GS06572.000-132, dated Augusl13,2021). As requested, we visited the subject site on June 20, 2023. The purpose of our visit was to observe components of the OWTS that were installed. At the time of our visit, we observed deviations from our design, listed in this letter. Soil Treatment Area ISTA) During a site visit on June 20,2023 we observed the components of the STA were installed and backfilled. . Dimensions: Six 3' x 91' trenches were installed with 4' of undisturbed soil between trenches (1,584 square feet total). Six 1.5" diameter, 91'distribution laterals were installed in the trenches.22lnfiltrator@ Std. Quick4@ Ghambers and 2 lnfiltrator@ Quick4@ Plus All-in-One endcaps were installed in each trench. The STA was constructed at a slightly different orientation than designed; it was oriented east-west rather than northwest- southeast. ¡ Effluent Piping: Laterals and manifold piping were installed level. Laterals were covered with lnfiltrator@ Std. Quick4@ Chambers, so we were unable to observe perforations. Observation ports were installed at the end of each trench. Transport lines from the automatic distributing valve (ADV) and air (vacuum) release valve as well as the manifold were backfilled at the time of our visit. We were unable to verifo slopes or connections. . Setbacks: Minimum setbacks to the home, tank, and property boundary were obtained. Septic/Dose Tank and Sewer Line During our site visit, we observed one septic tank that had been installed with interior components and had been backfllled. . Tank A 2,500-gallon, three compartment precast septic tank was installed level and backfilled. The tank was fitted with risers and lids. The riser on the dose tank was observed to be at least 24" inches in height to accommodate a bury depth of 24". . Pump: An Orenco PF3005 high head effluent pump and a Biotube filter were installed in the dose tank. An auto air release valve was not observed due to backfill. The STA was installed in a different orientation from the plans, and the length of transport line between the air release valve and the STA manifold was significantly reduced. Power was supplied to the pumps and alarm systems, but the electrical box was not installed at the 234 Center Drive I Glenwood Springs, Colorado 81601- Telephone: 970-945-2809 www.ctlt.com ffi CTL I THOM PSON @ final location. We observed alarm system functionality and a squirt test on the lateral nearest to the septic tank. We observed a squirt height of over 7 feet from the observation port elevation in the southernmost lateral. The other laterals will need to be squirt tosted. . Sewer Line: The sewer line was in place from the residence to the septictank but had previously been backfilled. We were unable to verify slope and bedding. . Setbacks: Minimum setbacks to the home, tank, and properly boundary were obtained. Deviations from Desiqn During our site visit, we observed several deviations from our design The STA was installed at a different orientation than designed. CTLIT does not take issue with the STA orientation. The STA, transport lines, and sewer line were backfilled prior to our arrival. We were unable to verifo pipe slopes or sizes. A new pump curve is providing using estimated pipe lengths of the installed system. The STA was installed at a greater depth than designed, especially at the distal end of the distribution laterals. Provided the soils at the infiltrative surface are consistent with the design and maximum cover depths from the design are followed, CTLIT does not take issue with the installed depth of the dishibution laterals. Recommendations/Comments We reviewed videos and photos from the contractor showing chambers installed level and skaight prior to backfilling. CTLITHOMPSON, lNC.Reviewed by: GWB a a a 6-E_ Ryan R. Barbone, P.E. Division Manager, G cc.osaqe.ex(@qmail.com dsteohens(Oosaqecustoms. com istott(Oosaq ecustoms. co m 234 Center Lrrive I Glenwood Springs, Colorado 81601 Telephorre: 970-945-2809 www.ctlt.com Pump Selection for a Pressurized System - single Family Resídence Prolect Green Line Architects / 565 Faranhyll Ranch Road Parameters D¡sch¡rge Assombly 8¡zô TËniporl L€ntlh Erfore Valv€ ïEnspoñ Bpe Class TEnsport Lha Size D¡rtribql¡ng Valrc Mod6l TÉnspo'l Lenglh Aîer Valv€ TÉnsForl Pips Chss TÉnspori Pipe S¡æ Mãx Êllvalion Lifl ManiloH Length Men¡fold Pipo Clrss Msnifold P¡po Si.! Numberqf Lateßls psrCall LaleEl L€nglh Lotonl Pipe Class lateEl Pips Si¿o Orifiæ Sl¿e odliæ sp¡c¡ng Resldual H6åd FlowMslor Add{ñ' Frict¡on Lossas Calculat¡ons 1.50 20 40 1.50 6605 80 40 1.50 5 0 40 1.50 5 79 40 1.50 3/16 1 None 0 lnchôs ¡nchcs feet f€et indres 300 250 200 150 100 50 PumpData fset 16êt i¡che! feêl ¡ndres inclìes leet feot inches l€qt ooILro do{¡ .g ts(!c o a Ê M¡nlmum Flow Rãte por Orif c6 Numbgrof Orilicos p€r Zon€ folal Flow Rate por Zonô Numb!ral Lat6rals p€rZone % Flw O¡f,erential l3ulssl Orifæ lß¡sport Vslocily Erfoß Valvs TÊnspsrl Vclac¡ly Añcr Valvs Frict¡onal Herd Losses 0.97 20 19.6 1 6.0 3.1 3-1 spfi gpm clo fPs fps Loss fhrcugh D¡scha¡ge Loss ¡¡ ÏEnspod Asforc Vålve Loss lhþugh Va¡ve Lgss in TÉnsport aflef Valve Los3 ¡n Ma¡¡fold Loss in Latsrals Loss lhrcugh Flomls Add.on'F íclio¡ Lossès P¡po Volumes 1.2 0.5 6.7 t.9 0.0 0.7 0.0 0.0 feot lest leet le.t leÉt feet leol leet Vol of Transport Lino Before Valve Vol of Trånsport Line After Vålve Vol ol Manlfold Vol olLelB€ls po¡Zone Tolal Vol Af,er Valve Mln¡müm Pump Requirements 2.1 8.5 0.0 8-4 2.1 r6.8 gals gals gals gals gals gals 5 10 Dês¡gn FlowRale Tolal Dynamic He¿d 19.8 gpm 2d.S lsel 15 20 25 f,¡et D¡scharge (gpml 30 35 40 Legend syslem cwg: Pump çurye: Pump Ogtim¿¡¡ãngei operatìOPoint: Deriftoint: PF3005 H¡gh Ho8d Êfiu€nt Pump 30 GPM. 1/2HP 115/230V 1ø 60H¿ 200V 3ø 60Hz PF3007 Hloh H4d Ellusnt Pump 30GPM, 3/,lHP 230V 1ø 60H2.200r160V 3ø60H2 PF30l0 H¡gh He¡d Enu€nt Pump 30GPM. lHP 230V lø 60H2, 2001460V 3ø 60Hz PF3015 H¡gh H€sd Efluonl Púmp 30 GPM, 1-1/2HP 230V tø ô0H2, 200/230/460V 3ø 60H¿ "9"SYSTET\46 I I \ \ ::===i, ;;\