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Home My WebLink AboutInstallation Observation for OWTS Design 07.29.16July 29, 2016 Ryan Ivy 6147 Brcun Court Arvada, CO 80004 303.908.7823 717 County Road 120 Glenwood Springs, CO 81601 Installation Observation for Onsite Wastewater Treatment System Design Lot 14, Lookout Mountain Ranches Garfield County, Colorado Dear Mr. Ivy, Project No. 48E ALL SERVICE septic, LLC reviewed the installation of the onsite wastewater treatment system (OWTS) design for the subject residence . The property is located outside of Glenwood Springs, in an area where OWTSs and wells are necessary The installation included a 1500-gallon, two-compartment poly septic tank, with risers and lids to grade, followed by 56 gravelless chambers in 4 trenches. A concrete distribution box serves the trenches. The total area installed was 672 SF. The owrs was generally installed according to specifications. This observation is not a guarantee of workmanship and/or parts and materials ALL SERVICE septic, LLC should be notified if changes are made to the OWTS in the future . Any additional OWTS construction must be according to the county regulations. LIMITS : Lot I 4 , Lookout Mounlain Ranche s Page2 Observations are limited to components that are visible at the time of the inspection. The installer must have documented and demonstrated knowledge of the requirements and regulations of the county in which they are working . The quality of the installation is dependent of the expertise of the installer, soil type, and weather conditions. Please call with questions. Sincerely , ALL SERVICE septic , LLC I ' Richard H. Pel7., Timothy R. Petz r- ---WHL LOCATED 400•FT r JORTHWEST OF PRO OSEO STA r--\ if'\ i ':V / ( ' : '°:(J"'\TEST PIT 1 .. _)_) . _, - N ~ ~ LOT 1 MOUNTAl 1~ = .,Q' ~o 1f )UT RA NC '~ES PROPOSED 4·BEOROOM RESOENCE TEST PITS 4" SOR 35 PVC SEWER PIPE (2% MIN FALL TO TANK) 1250 GALLON 2 ·COMPARTMENT SEPTIC TANK WITH EFFLUENT FILTER ON OUTLET 4" SOR 35 P PE (1% FALL MIN) ( 4 GRAVELLESS TRENCHES EACH TRENCH WITH 14 CHAMBERS (3' X 4 ') TOTAL NUMBER • 56 CHAMBERS TOTAL AREA • 672 SF OBSERVATION PORTS (TYP) 4" SOR 35 PVC LATERALS OISTR18UTION BOX BROUGHT TO GRACE APPROX IMATE DRIVEWAY J sire PLAN ~L oo K:Ju_I MOUNTAiN RA_N_C'"tt""'e:_s:_:===------::::==------=====~---------- --- 6147 BRAUr. ~CURT ARVADA. COLO' .>.DO 800"4 PHONE 30 , J S 7823 FAX 303 2 • 2796 -[ --- Tlot( LOCATJOf4 Of D 1STlMO ANO '"OPOSf:O Wllt0V£MtNT$ $HO'Mi ARC NOJTH( "''""'or APltWERT'r SlJlllvtT THI LOCATIOHS •Rt APHtOllllUi ft IT IS t H[ H~EON\ll"I OUt't' TO [l\ISUAE au. C'ONSTltUCTION ANO M'"0VlMlNTS LIXATIONS Alltt ACCUlllATt AU "T9ACKClSU.HC:U SHOIA.Dll CONn"MfD ""'°" TO[JICAVATlON Lot 14, Lookout Mountain Ranches 48E Garfield Counly Colo rado W1 1OF3 _J PIPES 1 PORTO PLATE - n l l r ~fHl[f \ 1 -s 1GN I EOROOMS -525 GALLONS PER DAY IT AL LOADING• 525 G.:.LLONS PER DAY ' EA TMENT LEVEL -TL' !!L TYPE• SANDY LCM.I LCUV.TED AREA• (525 !06LTARJ • 875 SF DUCTION 30'111-CHAM6ERS • 812 SF JICK • 4" CHAM6ERS P2 SF PER CHAMBER)• 5e 1 Al AREA PROPOSED • 672 SF :i:NCH SPECIFICATIONS f>T HOF TRENCHES • J FEET • I CHAMBERS FINISHED GRADE SLIP-ON PVC CAP OONOTGLUE ~~~~..1..~~-L-~~:~~!~ SEWER LINE ·4· SCHEDULE 40PVC SCHEDULE 400R4• SOR 35 PVC ........ ..__~~ INSULATED COPPER TRACER 'MREMAYBE INSTALL.ED TO LOCATE UNE IN FUTURE SWEEP 12 WAY CLEANOUT DETAILS (N.T.SI TYPICAL :OTH OF 'QUICK-4' TRENCHES• 58 FEET• 14 CHAMBERS I AL NUMBER OF 'OUICK-4' CHAMBERS• 58 1~2· ~ -1A 34· PIP£S PUICED N TOP PORT INTOP CR ENO 0 0 0 ---- 61~7 BRAUN COURT ARVADA, COLO~AOO a ll104 PHONE· 30 J '-'08 782-1 FAX. 303 :DG 2796 -1 _l 14 CHAMBERS PER TRENCH 56' Loi 14. Lookoul Mounlain Ranches 48E Galfiela Counly Colorado "r•n l¥J &'min LIMIT OF EXCAVATION ]-W2 ?Ofl 3 Ull J ~mm v t c CONCRETE LI D BOX AND COVER BROUGHT TO GRADE FINISHED GRA~D~E;_-1"'===:!!:=:=:::!::===-,...----- DISTRIBUTION BOX 0 DISTR IBUTIO N BOX 000 BAFFLE OR ANGLED PIPE TO BE USED AT INLET Septic Tank with the Addition of an Effluent Filter -1500 Gallon, 2-Comp. ~ ~~ 1 ..... «I tt ~ eOIT'le to 1· hOl'l'I l'tp nf Iona.. !lid '"''" Coo1r"9• -(f•"' cul lo ...,;,14 ,..;ghl) 101111 Adopt0< (<411 or boftod) tn1dr..~--'('.t:::::::t::::::::::::::::~:::::11t:J!~ 'ffnt onr.c:1 hRENCO 8RANf) '.tJ.tE r;Q T ENF c ~ct~ ---- 6147 BRA Utl COURT ARVADA. COLORADO 80004 PHONE 303 908 7823 FAX 3~3 cOG 2796 _J_' 2·] Uqlod lntl T I 1111-++---v.un 1n1o1 Ports ---r-- Lot 14, Lookout Mountain Ranches 48E Garfield County , Colorado ,.,.,,._ .. W3 3ol3 6147 Braun Court Arvada, CO 80004 303.908.7813 September 1. 2015 Ryan Ivy 717 County Road 120 Glenwood Springs , CO 8160 1 Subsurface Investigation and Onsite Wastewater Treatment System Design Lot 14 , Lookout Mountain Ranches Garfield County . Colorado Dear Mr. Ivy . Project No. 48E ALL SERVICE septic, LLC reviewed subsurface conditions on August 28th 2015, and completed an onsite wastewater treatment system (OWTS) design for the subject residence. The property is located outside of Glenwood Springs, in an area where OWTSs and wells are necessary. SITE CONDITIONS The property is currently vacant with the exception of a well and a driveway. A 4-bedroom residence is proposed. The site is a wooded area that slopes to the east, and has a moderate cover of ground vegetation and evergreen trees. The Soil Treatment Area (STA) slopes 8% to the east. The proposed residence will have a 4-bedroom STA, which will be located greater than 50-feet from the proposed septic tank(s ) and greater than 100-feet from the proposed STA. The current land use for the STA 1s a wooded area . There is no planned construction on the STA after installation. The STA will be re -vegetated to native vegetation . Erosion control and re-vegetation will take place after OWTS construction . SUBSURFACE The subsurface was invest igated by LKP Engineers on August 6" 2015, using a rubber tire backhoe, by digging three soil profile test pit excavations (Test Pits) 8-feet (max) in depth. The materials encountered 1n the Test Pits consisted of light brown , moist topsoil to 2-feet, underlain by silty red , slightly clayey sand with scattered gravel lenses and scattered large boulders up to 2 feet in diameter. Refusal by the large boulders was apparent in test pit #3. A long term acceptance rate (LTAR) of 0.6 gallons per square foot, will be used to design the OWTS, in accordance with Soil Type 0 outlined in Garfield County On-Site Wastewater Treatment System Regulations for ST A 's. DESIGN SPECIFICATIONS Lot 14, Lookout Mountain Ranches Page2 The OWTS design is based on 4 bedrooms and 525 gallons per day proposed. Design Calculations 4 Bedroom = 525 gallons/day 525 / LTAR 0 .6 = 875 SF 875 x 0.7 (chamber trenches)= 612 SF 612 / 12 SF= 52 chambers mm1mum (3' x 4 ' Q-4 chambers) Proposed 56 Quick-4 Chambers The installation must include a minimum 1250 gallon , two compartment septic tank with an effluent filter on the outlet. The tank must be approximately 18" below grade, with a maximum depth of 4.0 feet. Effluent will be directed via a 4" sched 40 PVC pipe to a distribution box. The distribution box should be brought to grade and have speed levelers to control effluent. Four chamber trenches, with each trench having 14 Q-4 chambers, for a total of 56 chambers must be installed. Effluent will be directed mto the chamber trenches via a 4" PVC pipe placed in the top port of the end plate of the chamber. The bottom of the trench excavations must be free of boulders and/or large rocks. An observation pipe must be installed at the end of each trench. Observation ports may be capped and installed below grade in a sprinkler box. The component manufacturers are typical of applications used by contractors and engineers in this area . Altern ative s may be considered or recommended by contacting our office . Construction must be to County L and Use Regulations. and On·S1te Wastewater Treatment System Regulations, the OWTS Permit provi ded b y the County. and this design REVEGETATION REQUIREMENTS A n ad equate layer of good quality topsoil capable of supporting revegetation shall be placed over the entire distur bed area of the OWTS installation . A mixture of native grass seed that has good soil stabilizing chara cte ri st cs (but without taproots). provides a maximum transpiration rate, and competes well with su ccession al species. No trees or shrubs. or any vegetation requiring regular irritation shall be placed over th e STA. Until vegetation is reestab lished, erosion and sediment control measures shall be implemented an d maintained on site . The owner of the OWTS shall be responsible for maintaining proper vegetation co ver. OPERATION INFORMATION AND MAINTENANCE T he p ro p erty owner shall be responsible for the operation and maintenance of each OWTS servicing the p rop e11y. The property owner is responsible for maintaining service contracts for manufactured units, altern ating ST As, and any other components needing maintenance. Geo-ft"lh ric s or plastics should not be used over the absorption area. No heavy equipment, machinery, or materia ls should be placed on backfilled STAs. Livestock should not graze on the STA. Plumbing fixtures should be checked to ensure that no additional water is being discharged to OWTS. For example, a running toilet c· lea ky faucet can discharge hundreds of gallons of water a day and harm a STA. Lot 14, Lookout Mountain Ranches Page 3 The homeowner should pump the septic tank every two years, or as needed gauged by measurement of solids in the tank. Garbage disposal use should be minimized, and non-biodegradable materials should not be placed into the OWTS. Grease should not be placed in household drains. Loading from a water softener should not be discharged into the OWTS. No hazardous wastes should be directed into the OWTS. Mechanical room drains should not discharge into the OWTS. The OWTS is engineered for domestic waste only. ADDITIONAL CONSTRUCTION NOTES If d1... sign includes a pump, air release valves and weep holes must be installed to allow pump lines to dra1 11 to minimize risk of freezing. The pump shall have an audible and visual alarm notification in the eve1 1t of excessively high water conditions and shall be connected to a control breaker separate from the high water alarm breaker and from any other control system circuits. The pump system shall have a switch so the pump can be manually operated. Excavation equipment must not dnve in excavation of the STA due to the potential to compact soil. Ext r ·ans r-llould be placed on all septic tank components to allow access to them from existing grade. Bar . I over tile ST A must be uniform and granular with no material greater than minus 3-inch. INSTALLATION OBSERVATIONS ALL SERVICE septic, LLC must view the OWTS during construction. The OWTS observation should be perf rmed before backfill, after placement of OWTS components. Septic tanks, distribution devices, pun , dosil g siphons, and other plumbing, as applicable, must also be observed. ALL SERVICE septic, LLC ul I notified 48 hours in advance to observe the installation. LIM Th e fr?sign is based on information submitted. If soil conditions encountered are different from conditions desc1 bed in report, ALL SERVICE septic, LLC should be notified. All OWTS construction must be acco hng to the county regulations . Requirements not specified in this report must follow applicable co u rcgt tions. The contractor should have documented and demonstrated knowledge of the re q nc t ;m d regulations of the county in which they are working. Licensing of Systems Contractors ma v n. re qu ired by county regulation . Pl 0 -:;i ll v11t h questions. Si n •ly, A ll _RVICE septic, LLC Reviewed By: .l-,• ··~{~\ \·~~ ...) \ ~ J .. • •. Richard H. Petz, T · tz