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Home My WebLink About03686'• I ! I I I ~ I I I t.'. ··~~ • GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT 109 8th Street Suite 303 Glenwood Springs, Colorado 81801 Phone (303) 845·8212 • Permit N~ 36 8 6 .J Asaesaor'e Parcel No. I \ ~ e { This does not constitute l ( INDIVIDUAL SEWAGE DISPOSAL PERMIT a building or use permit. 1 -,'. i ~PROPERTY . ~ f5ik r • '\. O ~• 1 \. >~A t ,...-,...,.. .. ,.\... I' .,-\ ~ -i..t-C6 ,, J owner's Nam~DL\CX,U er.! O I\~ 11.Qit Address h::ll..Ji;;n,h\I Q ..::P-: PhonW-~ l I SystemLocatlonDC>5'a 0.e.r1sv'Bo ac.nJ"?d ('ch b I 3~:~1. lo! l o(0 Censv~c..L I i Legal Description of Assessor's Parcel No. t ;I l I ' l i SYSTEM DESIGN _____ Septic Tank Capacity (gallon) ______ ,Other _____ Percolation Rate (minutes/inch) Number of Bedrooms (or other) ____ _ Required Absorption Area • See Attached Special Setback Requirements: Date d,,, J: .2ocJ 3 ;/ Inspector ---"'5""""7;t/.:=:O:Ltf'L!..t_<,_, _ _,6,::-c.:··~'-'l..;r.,.._~----------------; z; FINAL SYSTEM INSPECTION AND APPROVAL (as installed) I I l i/ ' I ~ I t l ., Call for Inspection (24 hours notice) Before Covering Installation i ( t i! f I , ' ' • I ' • l System Installer ____________________________________ .-;:·_·_ Septic Tank Capacity•------------------------------------- Septic Tank Manufacturer or Trade Name-----------------------'-------- Septic Tank -vcess withins·: of surface ____ .._------------------~------ Absorption Area------'-...... -----~------------------------'- Absorption Area Type and/or Manufacturer or Trade Name------------------------ Adequate compliance with County and State regulations/requirements ___________________ _ Other _____ ~~----------------------------------l\ KIO? Inspector ~ ~ Date RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE •CONDITIONS: 1. All Installation must comply with all requirements of the Colorado State Board of Health Individual Sewage Disposal Systems Chapter 25, Article 10 C.R.S. 1973, Revised 1984. I I ' t ; I l I r \ ' 2. This permit Is valid only for connection to structures which have fully complied with County zoning and building requirements. Con· •. nection to or use with any dwelling or structures not approved by the Building and Zoning office shall automatically be a vlolatlon or a ~ requirement of the permit and cause for both legal action and revocation of the permit. i 3. Any person who constructs, alters, or Installs an Individual sewage disposal system In a manner which Involves a knowing and material J variation from the terms or specifications contained in the application of permit commits a Class I, Petty Offense ($500.00 fine-6 ~ months In Jail or both). i WhHe. APPLICANT Yellow. DEPARTMENT I i MAY-23-2002 THU 01:06 PM CB CONSTRUCTION DESIGN FAX NO. 9709276553 P. 02 ' INDIVIDUAL SEW AGE DISPOSAL SYSTEM APPUCATION OWNER V\JM!erfp'.eO"l tfotyk.s ADDRESS 150 s. J?a.hl;a. "Denver. c..Q PHONE so3 qi.11 t./f,S~ CONTRACTOR C.B C.01'\S1rl.Achof\ 1 ~6-19n Inc ADDRESS 241?i fulk.Avw $f(; 301 "Basatf,CO eti..z.1 PHONE q10 '12-1 telJ-Z..I PERMITREQUESTFOR (X) NEWINSTAILATION ( }ALTERATION ( )REPAIR Attach separate sheets or report showing entire area with respect to surrounding areas, topography of area. habitable building. location of potable water wells, soil percolation test holes, soil profiles in test holes (See page 4). LOCATION OF PROPOSED FACILITY: Near what City of Town Coy boflob.k. C.O Legal Description or Address Ce.Yi'i>t. '!;a:,rd1 S@dit!isi"c:Yl (,JJf ~ft WASTES TYPE: O<f." DWELLING ( ) TRANSJENT USE ( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES ( )OTHER·DESCRIBE~---~~~--~~~-~~ BUILDING OR SERVICE n'PE: si'.tl3 le. Faw!"• fy 'Res i de.nC? , f?e514er1-l-ia.I wood Ff"CVYlL.; Number ofBedrooms Number of Persons------ 91'" Garbage Grinder ~Automatic Washer ~Dishwasher SOUBCRANPTYPEOFWATERSUPPLY: ( ) WEIL ( ) SPRING ( ) STREAMORCREEK If supplied by Community Water. give name of supplier: Ce.r-t~e. 7Zt ~ct. lj c s.bd'N IJ i1 ....._ DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: €'° ""'-,/e._r ·~--=--~-""'------~-- Was an effort made to connect to the Community System7_ .... AJ..__o ___________ _ A site Wgp fs regulml to be submitted that fwtit:•tu the fokwlng MINlMIJM cUataJICM: Leach Field to Well: 100 feet Septic Tank to Well: 58 feet Leach Field to Jrrlgadon Ditches, Stream or Wat.er Course: SO feet Septic System to Property Llaes: (septic tank &leach field )10 feet YOJJR INDIVJDUAL SEWAGE DNPO$AL SYSTEM PEBMITWILL NOT BE ISUPWIWOlJT ASIJIPl..AN. QR.OUND CONDITIONS: Depth to firstOround Water Table ____________________ _ Percent Ground Slope ____________ ~----------~- 2 MAY-31-2002 09:02A FROM:BLDG~CO 9703843470 ...... ~" c.uuc. 111u u1 •ut rn \.oil li\A'll>IKUlil IUN Ut.:;lliN ' .• I T0:9P9276553 FAX NO. 9709276553 P:1'1 P. 03 TYPB OF INDIVIDUAL SBWAGBDISPOSAL SYSTEM PROPOSED: ( ) SEPTIC TANK ( ) ABRATIONPLANT ( ) VAULT ( ) VAULT PRIVY ( ) COMPOSTING TOJLBT ( ) RECYCLING, POTABl..B USB ( ) PJTPRIVY ( ) INCJNBllATION TOlLBT ( ) JU!CYCUNO, 01lfEll USB ( ) CHEMICAL TOILBT <Xl 01HBll-DESClUBE ~£.U..S PINALDlSPOSAL BY: ( ) "ABSORPTION '!UNCH, BBD OllPIT ( ) BVAPOTRANSPIRATION ( ) UNDBllOROUNDJ>ISPBSAL ( ) SAND FILTSR. ( ) ABOVE GROVND DISPBRSAL ( ) WASTBWATBRPOND ( ) OTHBll-DBSCBJBB WILL BPPLUBNT BE DISCH.ilGBD DlllBC1LY lNTO WATERS OF THE STATB? _____ _ pBBOO!,ATJQNTBSTRWJLTS: (To boc:omplflled byBeslltend Professional B.nai ..... lfibeEnalneer does tho Pen:olidion Test) Minutet. ____ .,.. inob lnhole No. 1 Minut.es _____ er inch in bole NO. 3 ~inch iaholo No. 2 Mh» .... ______ _.perinch In hole NO._ N11118, adckws ~ tellrpboilo ofRPE wbo made IOil abaorptioD tolta:. ___________ _ Name, addreuand telephone of1lPE ruponsible for dellp oftlle l)'JtA!m:. __________ _ .Applicul aolmowJeclps thlt die ~ •s of the appJ!cation i& COllditioaa1 upon sucb fbrther llWldatOI)' and edd'ttjonel ..... ind NpOIU • llll)' bo Mplinld by 1ho loclll hialdi depai &mc:flt to bo made 11111 filmlsbed by the applioaDt Ot by tbe IOOil h..it.la depwW ibr pwpoaed ofdle eYlluation of the applioation; lllld the illlllllllll of the p.ermit Is IUbjeet 10 llllCh tenna 11111 OOlldiliaas .. d-v-1 llOCll88111}' to insure aomplilftOO with rukrl aod nauJatk>ns made, ln&:wmltion 11111...,.. ·~ hclrowltb lllld required to bo uJDiUocl by the applieut -or will bo represented to bo tiue llld OOll9C# 10 die bolt of m;y laluwleclp and beli.t' .nd ... d4111iped to be relie4 Oil by the looaJ deputmllllt of holkh in ISYll1111iaa die lllllO 1br purptllel ofillulaa the pormit llPJllied for IKnisl. I fiutbor UlldanWld thlt Ill)' f+d!lcationor mlinpr l•iollllll)' rwlt ht the dtllllal of the ~lltian or~ of llllY pennit jiaaled baaed upon Rid appbtioll lllll In Jep1 aeti.on for perjtuy as provided by law. -Clf44~-~-c/n/02 PLBASB DRAW AN ACCIJllATB MAP TO YOUR PllOPBR.TYll 3 ----.-----~--------------.~~~ Chuck Brown C & B Construction Lot 66, Cerise Ranch 298 Park Avenue, Suite 301 Basalt, CO 81621 RE: Proposed ISTS System, Lot 66, Cerise Ranch, Cerise Ranch Road, Garfield County, CO SE Job No. 22060.01 Dear Chuck: June 18, 2002 Pursuant to your request, attached herewith is a letter/report presenting our findings in regard to the feasibility and design for an Individual Sewage Treatment System (ISTS) at the above referenced Site. This design is based on our evaluation of the site conditions with information provided by others for use in supporting your application to Garfield County. Our recommendations are in accordance with Garfield County and the State of Colorado ISDS Regulations. Garfield County must permit any proposed improvement to the site. We have reviewed the information forwarded to us, conducted a site visit, formulated an ISDS design and created a site plan with construction details as part of our scope of work. Conclusions Based on our findings we believe that the design and installation of an approved ISTS system is feasible in accordance with the Regulations of Garfield County and the State of Colorado. We recommend that a new 1500-gallon septic tank equipped with an approved wastewater treatment unit installed in the tank per Association standards. The treated effluent will discharge to a distribution box to be equally distributed across a 465 square foot soil dispersal field system. The soil dispersal system can be installed in natural soils and needs to be located within the building envelope down gradient of the proposed house, as delineated on the attached plan. The system will meet all required setbacks and be installed within the general boundaries indicated on the plan. Our Design is outlined below and delineated on the attached site plan. Site Location The subject site is located in the Cerise Ranch Subdivision at Lot 66, on the west side of Cerise Ranch Road adjacent to State Highway 82 in Garfield County, Colorado. The site is situated in Section 32, T 7 S, R 87 W of the 61h P.M. The Site comprises approximately 2 acres. The site is bounded on the north and west by adjacent undeveloped single-family lots (65 & 64 respectively). I 502 Main Street • Suite A3 •Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313 SOPRIS ENGINEERING • llC civil consultants Existing Site Conditions Chuck Brown SE Job No. 22060.01 June 18, 2002 Page2 The site is located on previously undeveloped, irrigated agricultural lands. The site has a gentle slope (2%) toward the west toward the existing drainage ditches and Blue Creek. The existing ground surface in the proposed septic area has an approximate slope of 2%. The site has been regraded and was previously covered with hay fields and pasture grasses. Domestic water will be supplied by a central water system. The majority of the lot is delineated as a common area/open space or easement. An existing lined pond water feature is situated in the Southeast corner of the site. A relocated drainage ditch and easement runs across the Southern section of the lot approximately 60 feet north of the southern building envelope line. An existing well is located of the northeast corner of the pond approximately 200' from the proposed dispersal/infiltration field. Proposed Site Conditions It is our understanding that you intend to construct a 3560 SF, two-story, 3-bedroom single-family home with an attached garage. The maximum number of rooms that could be utilized as bedrooms in the structure is 4. The proposed improvements will include a new ISTS system with appropriate site grading. The new structure is to be generally located as shown on the plan. The site is required to have an engineered sewage treatment system to be installed and maintained in accordance with specifications and regulations approved by the Homeowners Association and the covenants of the subdivision approved by Garfield County. Basis of Sewage Treatment System Requirement Pursuant to Section 4.15 Wastewater Treatment contained in the Declaration of Covenants, Conditions, Restrictions and Easements for the Cerise Ranch Subdivision (Covenants) certain provisions for the design, installation and maintenance of ISTS for individual lots are required. " Wastewater treatment shall be supplied to each Lot by individual sewage treatment system (ISTS) installed by each Owner in accordance with the ISTS Design and Performance Standards set forth in Section 17.1.D. and maintained by the Association in accordance with the provisions of the ISTS Maintenance Plan set forth in Section 9.4. The Association shall be responsible for setting all rates, fees or charges for inspecting, maintaining and repairing each individual system and such rates, fees or charges assessed by the Association against each lot for such inspection, maintenance and repair shall be a personal obligation of the Owner thereof which the Association shall have the power and duty to enforce." Development of the site's ISTS will be in accordance with the above referenced design and Performance Standards. It is our understanding that a standard system(s) may be adopted for use on all the lots within the subdivision. The approved system will be installed in a standard concrete septic tank with minor modifications. We recommend installing the Orenco Systems Advantex-AX-20 unit. It is our understanding that the Oren~o Systems Advantex unit has been approved. Subsurface Conditions Chuck Brown SE Job No. 22060.01 June 18, 2002 Page 3 Attached herewith are the results of the subsurface investigation and percolation tests conducted on November 19, 2001 by Hepworth-Pawlak Geotechnical, Inc. The report is dated December 6, 2001 (Job Number 101 756). The subsoil encountered at the site consists of 'h foot of topsoil overlying relatively dense, slightly silty to silty sandy gravel with cobbles to the profile boring depth of 10 feet. Groundwater was encountered at 10 feet in Boring 1, located in the northeast corner of the site and at 6 feet in Boring 2, located in the southwest corner of the site. The sandy, silty gravel soils are classified as sandy gravel in terms of structure and have a hydraulic loading rate of 1.30 to 1.6 gallons/day/SF The equivalent percolation rate is 5 to 10 minutes per inch. Design Criteria The proposed single family home contains 3 bedrooms. The minimum design requirement at Cerise Ranch is 4 bedrooms. The design flow is calculated as follows: Single family home -equivalent 4 bedroom population @ 2 person /bedroom = 8 persons. From the Garfield County I. S. D. S. Regulation; Max. Design flow (Qd) =#of people x (avg. flow) x 1.5 gal/person/day. Gallons per day per person for the subject house = 75 gal/person/day Assume 8 people daily population Qd = 8*75*1.5* =900 gal/day Septic Tank Design Based on Design Flow Qd. Qd = 900 gal/day Volume (V) of tank= Design Flow• 1.25 (30 hour retention time) V = 900 gal/day • 1.25 days = 1125 gallons To provide for future changes in use of the facility and accommodation of the treatment unit we recommend a minimum tank size of 1500 gallons. Use one 1500-gallon, concrete, dual compartment septic tank. Treatment System Criteria Chuck Brown SE Job No. 22060.01 June 18, 2002 Page4 Pursuant to Section 17.1.D, in the Covenants, the engineered system shall be designed to service at least (4) bedrooms utilizing an approved advanced treatment system. The advanced treatment system may be a recirculating trickling filter, sequencing batch reactors and/or other accepted on-site wastewater treatment system technologies. The system shall be capable of producing effluent quality which meets or exceeds the requirements of the US EPA for secondary wastewater treatment (30mg/L BOD and 30 mg/L suspended solids). All dispersal fields shall be sized to adequately service (4) bedrooms. All ISTS components shall be accessible from the surface to facilitate system testing and maintenance. Appropriate isolation valves or a distribution box is required. We recommend installing the Orenco Systems Advantex-AX-20 unit. Treatment System Design With respect to effluent quality, maintenance and operation requirements, a compact recirculating trickling packed bed filter treatment system packaged in and on a new concrete septic tank is the preferred method of treatment. The Orenco Systems Advantex-AX-20 is a "State of the Art" pre-manufactured package system that provides economical, quiet, odor free operation that provides excellent wastewater treatment, which exceeds the requirements of the EPA for secondary wastewater treatment. Raw sewage inters a standard 2-compartment septic tank for conventional primary treatment. Clear zone effluent is filtered and pumped to a distribution manifold in the Advantex filter pod via a pump/filter vault assembly installed in the secondary septic tank compartment. Effluent percolates down through textile media and is collected in the bottom of the filter pod. The vertical textile media provides approximately 40,000 SF of surface area for bio-mat attachment. The treated effluent is discharged out of the filter pod to a recirculating splitter valve (RSV) which, splits the flow between return flow back to the septic tank and flow to the dispersal/absorption field. During periods of no sewage loading all of the discharge is returned to the tank. The return flow is discharged back to the secondary compartment or if nitrogen removal is desired the return flow is discharged back to the primary compartment. The Advantex recirculating pump typically runs only 90 minutes per day. The Advantex AX-20 is designed to provide treatment resulting in effluent water quality parameter levels of 15 mg/L BOD and 15 mg/L TSS based on typical residential strength wastewater. Assuming an average BOD concentration of 150 mg/I the unit will remove 90% of BOD and up to 85% total nitrogen removal. The Orenco Systems Advantex AX-20 is adequate to treat wastewater from an equivalent 5-bedroom home utilizing a 1500-gallon septic tank. Effluent Dispersal System Design Treated effluent is pressure discharged to the ground via a soil infiltration system allowing the infiltration of treated effluent into the soil. The infiltration/dispersal field is sized adequately to maintain long-term acceptance of the treated effluent into the ground. We do not anticipate that a conventional bio mat will form on the bed surface. The bed will provide a means for achieving tertiary treatment (polishing). However for sizing the infiltration/dispersal system we are utilizing the guidelines approved by the State of Colorado for sizing of an absorption field. A soil infiltration/dispersal bed system, utilizing gravelless Chuck Brown SE Job No. 22060.01 June 18, 2002 Pages chambers is recommended. The chamber units may be installed in native soils. The State allows a maximum 40% area reduction for the use of gravelless infiltration chambers in a bed configuration. Based on the hydraulic loading rate of the receiving soils and the absence of a conventional bio-mat on the infiltrative surfaces in the field we estimate that the long-term recovery rate of the daily peak loading will be less than 2 hours. Soil Dispersal/Infiltration Field System Design The average slope in the septic envelope location, just north of the building site, is 2-5 %. Based upon the percolation test rates, we propose replacing gravel soils under the proposed infiltration bed with a minimum 2 feet of select sand. The size of the infiltration bed is based on the long term acceptance loading rate for conventional sand soil of 1.20 gallon/day/SF A(SF)= QQ_ LTAR : where A= Area; Qd = Design flow (gal/day) LTAR = 1.30 g/d/SF This design calculation results in a recommended minimum absorption area: A= 900 = 692 sq. ft. 1.30 Apply a 40% reduction for utilizing gravelless infiltration chambers. 692 x 0.5 = 415 sq. ft. Use 415 SF of trench with gravelless chambers: Assume 3-foot wide by 6.25-foot long chamber units. Assume 15.5 square feet per chamber: 415 sq.ft. = 27chambers Use 28 chambers for 434 SF. 15.5 sq.ft/chamber We recommend using a bed system composed of 4 rows 44 feet long and 12 feet wide, containing 7 standard infiltration chamber units in each row. Excavate absorption field to accommodate a minimum 900 SF of interior surface area. This design is conservative based on the estimated recovery rate and the high quality of effluent applied to the bed. Effluent Dosing Distribution System Due to the shallow ground water at 6 feet the dispersal field will be installed shallow necessitating the use of a pump system. An Orenco pump-basin vault shall be installed adjacent to the septic tank that will accept treated effluent from the advantex discharge line. A distribution manifold and dosing pump assembly w/ automatic controls and alarms shall be installed components in the pump basin. Install a 24" diameter, 72" watertight riser vault with an insulated lid at the surface to easily inspect and maintain system components from the surface. The pump distribution system shall be installed to discharge effluent to the infiltration/dispersal field through the distribution manifold in the pump basin. The dosing volume shall be a minimum of 50 gallons per dosing cycle. The approximate storage volume in the 24" diameter basin is 56 gallons. Isolation ball valves will be installed on each pressure discharge line from the • Chuck Brown SE Job No. 22060.01 June 18, 2002 Page 6 manifold. Install a quick disconnect threaded coupler on the pump discharge line. Extend discharge lines up to within 12" of the access lid to provide easy access for maintenance of the pump. Install pumps assemblies, risers, electrical systems, floats and discharge line per manufactures installation guidelines. Use an Orenco systems model p 200511 dosing pump. The system shall be inspected by a qualified technician every six months. All installation and maintenance shall be performed by a qualified person, in accordance with the Installation & Maintenance Guidelines for the Orenco Systems components. The distribution manifold system shall distribute pressurized flow evenly to each chamber row in the dispersal fields. The pressure discharge assembly shall be installed in a cold weather and drain back configuration to allow access to the assembly and the drain back of liquid in the discharge lines through an orifice drilled in a fitting, on the discharge side, at the bottom of the vertical distribution loop near the outlet port in the pump basin. The distribution manifold will be configured with an individual discharge line for each field. The effluent will discharge from the pump through a 1.25" line to the 1.25" manifold with two 1.25" distribution lines out to a tee at the head of each field. The flow will split again at the tee/header pipe that connects to a perforated distribution pipe running along each row of chambers in the individual bed. Connect the lines to 1 inch perforated distribution lines. The invert of the effluent discharge line at the pump basin outlet port shall be at least 12" below the invert of the perforated distribution lines at the head of each chamber row. The transport line from the dosing pump to the absorption field shall be schedule 40 PVC with a maximum diameter of 1.25 inches. The trenches will be pressure dosed utilizing a maximum 1" diameter perforated pipe running the length of the trenches to the midpoint of the end chamber. An inspection port should be installed on the top mid-point cut out on the end chambers in each row. This will allow for checking the performance of the system over time. The orifices in the distribution lateral shall be 1 /8" diameter spaced at a maximum 4' apart. The perforated distribution pipe will be installed at the top of the chambers and oriented to spray upward off-center. The effluent pump shall be sized to pump at a minimum velocity of 4 ft/sec. The dosing volume shall not exceed 50 gallons. A plastic ball valve will be installed on the end of the pressure distribution pipe to be visible and operational from the 4" inspection port. The ball valve may be used for flushing the line if necessary. The valve will always be closed during normal operation. Control Systems An Orenco Systems control box will control all functions and monitoring of the installed system. The controls will record all operational cycles and will make adjustments if necessary. Alarms for the treatment system components in the septic tank and the distribution pump basin will be recorded and reset through the control box. A Vericomm Telemetry control will be installed with the control box to allow offsite monitoring, data collection and remote operational setting control. Each system at Cerise Ranch will be set up with this web-based technology for use by authorized operators. ISTS Operation and Maintenance Chuck Brown SE Job No. 22060.01 June 18, 2002 Page 7 Pursuant to Section 9.4, ISTS Management Plan, in the Covenants, the engineered system shall be inspected on a regular basis and be properly maintained. Ownership of the system and responsibility for construction, repair and maintenance will remain with the Lot Owner. The Association shall retain the services of qualified personnel to inspect the ISTS's and to perform all maintenance and repairs necessary to ensure that the system is installed properly, is in good operating condition and is in compliance with the performance requirements set forth within Section 17.1.D. The operating components of the ISTS system will be inspected within 30 days of being placed into operation and thereafter at least quarterly. The treated effluent being discharged shall be sampled and tested for BOD and TSS content at least biannually. Administration of these requirements is delineated in Section 9 .4. Attached is a copy of a maintenance agreement with SCG Enterprises the company that will install the system. The ISTS system should require minimal maintenance. Several factors influencing the need for maintenance include: actual wastewater flows versus design flows, the volume of kitchen/domestic waste (excluding human waste and toilet paper), excessive household chemicals and other toxic liquids. The tank, dispersal field and other applicable treatment system components should be visually inspected bi- annually for debris, wear, damage, leaks, or other potential problems. In general, for a properly utilized system, septic tanks should be pumped and inspected every 2 - 4 years. The effluent filters should be cleaned every six months and at the time of pumping. Dispersal fields should be maintained with suitable cover and kept free of root invasive plants. Positive surface drainage away from the infiltration field should be maintained. Attached are an ISDS and Advantex operation and maintenance guide. Construction and Inspections Prior to construction of the permitted system the engineer should be contacted by the contractor and owner well in advance to provide adequate time to discuss the system components with the contractor, answer questions, resolve any conflict issues and schedule inspection site visits based on construction progress. County Regulations require that the Design Engineers of record perform site inspections of the permitted system during construction and provide "As-Built" documentation of the installed system to the County after construction is complete. General Notes 1) All materials and installation practices shall conform to the Garfield County Individual Sewage Disposal Regulation. 2) All sewer lines and distribution lines in the system shall be 4" Schedule 40 or SDR-35 PVC unless specified otherwise on the plans. 3) Add a two-way clean out on the service line from the house. 4) The system shall be plumbed to distribution effluent into the bed with equal distribution. 5) The contractor shall ensure that the concrete septic tank and sewer lines are watertight. 6) The trench area must be protected to prevent damage from vehicular or livestock traffic and must be crowned to divert drainage runoff away from the trenches to minimize surface infiltration. . . Chuck Brown SE Job No. 22060.01 June 18, 2002 Page8 7) The infiltration chambers shall be installed level in the bed. The top of the backfill over the chambers shall be covered with filter fabric or other suitable pervious material to prevent the migration of fines from the overlying topsoil layer. 8) The field must have a minimum cover of 12 inches. A final cover of topsoil suitable for vegetation, a minimum 4" deep, shall be placed from the top of the pervious cover layer to the finished surface grade. 9) The dispersal field must be sodded or covered with vegetative ground cover. 10) The treatment unit shall be installed by in accordance with the manufactures specifications and installation guidelines by qualified personal. Our design and recommendations are based upon data supplied to us by others. If subsurface or site conditions are found to be different from those presented in this report, we should be notified to evaluate the effect it may have on the proposed ISTS. If the County Environmental Health Department requests changes or modifications to this design, we should be contacted to evaluate the effect on the ISTS. If you have any question or need any additional information, please call. Sincerely, SOPRIS ENGINEERING, LLC .//~ /u~( ~ ~ Paul E. Rutledge Desi · ;.~ I#< j ~ ~ ... AdvanTex™ -AX Filter Applications Orenco's AdvanTex™-AX Treatment System is an innovative tech- nology for onsite treatment of residential wastewater. The heart of the System is the AdvanTex™-AX Filter, a sturdy, watertight fiber- glass basin filled with an engineered textile material. This light- weight, highly absorbent textile material treats a tremendous amount of wastewater in a small space. The AdvanTex™-AX Treatment System is ideal for: •Small sites •System upgrades and repairs • New construction • Poor soils • Nitrogen reduction • Price-sensitive markets • Pretreatment For sizing, see 'Design Criteria,' EDA-ATX-2. The heart of the AdvanTex'"-AX Treetment System is this sturdy. watertight fiberglass basin filled with an engineered textile material. Orenco Systems• lncol'poreted C/Mnfi"l tlH Wa, 11N WorU /Joa W4S1tw.rttr• www.orenco.oom Residential Technical Data Sheet Features/Unique Specifications To specify this product, reauire the lollowjng: •Wastewater treatment to better than "Secondary" Treatment Standards •Consistent treatment, even during peak flows • limer operation for flow monitoring, flow modulation, and surge control • Rxed film textile media (a polyester plastic), operated in an unsaturated condition • Consistent media quality •Low maintenance beyond annual servicing • Low energy consumption (under $5/month power cost at national average electric rate of $.08 kWh) •Complete pre-manufactured package, ready-to-install •Watertight construction, corrosion-proof materials, tamper- proof lid bolts •Optional anti-flotation flanges • Quiet operation Standard Models AX10,AX20 Physical Specifications Approximate Dimensions* AX10 Riter Basin Length Width 2.5ft Height 2.5ft Area (footprint) 10 sq. ft Riter Dry Weight 150 lbs. AX20 7.5ft 3ft 2.5ft 20 sq. ft 300 lbs. *See AdvanTex™ Treatment System drawings for exact dimensions ATO·ATX·AX·1 Rev.1.3 ~ 5/01 Design Criteria AdvanTex™ Treatment Systems for Residential Applications System Selection The AX Series of the AdvanTex™ Treatment System treats residential strength wastewater to better than "secondary" standards. The treatment system can be configured in two Modes. Mode 1 recirculates only through the second compartment of the Processing Tanlc Mode 3 recirculates through the entire tank for maximum nitrogen reduction. The final discharged effluent can be either "Filtrate Discharge" or "Blend Discharge." Refer to AdvanTex™ Treatment System drawings for further details on Mode and dis- charge options. To help select the Mode best suited for your application, use the following chart and treatment criteria: Table 1. Typical Effluent Quality AdvanTex™ Mode AX-Model* Filtrate Discharge -Residential Blend Discharge -Residential AX-Mode 3* Filtrate Discharge -Residential Blend Discharge -Residential 15 20-40 15 30-45 TSS (mg/L) 15 20-30 15 20-40 • These numbers are conservative expectations of system performance based on typical flow rates, recirc ratios between 3 1/2: I and 5: 1, and the average waste strength described further in this document. Nitrogen reduction in Mode 1 will typically exceed 50 percent, with total nitrogen in the filtrate ranging between 25 and 35 mg/L±. In Mode 3, nitrogen reduction can reach 85 percent or better, depending on wastewater strength and other characteristics like grease and oils, pH, and alkalinity concentrations. Nitrification can be inhibited if the buffering capacity (alkalinity) of the wastewater is too low. On a theoretical basis, 7.14 mg/L of alkalinity as CaC03 is needed to nitrify 1 mg/L of NH.+, Performance will vary with loading rates. By lowering the typical design loading rate shown in Table 3, discharge characteristics of 10110 may be achieved. System Operation: Description of Treatment Process Raw sewage enters the two-compartment Processing Tank through its inlet tee. In the first compartment, the raw sewage separates into three distinct zones: a scum layer, a sludge layer, and a clear layer. A flow-through port(s) in the Tank's baffle wall allows effluent from the clear layer to flow into the second compartment of the tank. The Biotube® Pump Package, in the second compartment, pumps filtered effluent to a distribution manifold in the AdvanTex™ Filter. Effluent percolates down through the textile media and is collected Orenco Sptems• lncofporated 1-800-348-9843 EDA·ATX-2 Rev.U~lni/01 P1ge1 Design Criteria, cont in the bottom of the filter pod. The treated effiuent flows out of the filter pod through the Filtrate Return Line that returns the treated effiuent to the Recirculating Splitter Valve (RSV). The RSV auto- matically splits or diverts the flow between the Processing Tank and the final discharge. The RSV also controls the liquid level within the Processing Tank. During extended periods of no flow, I 00% of the treated effiuent is returned to the Processing Tank. The residential AX Series filters have a passive vent system and do not require the use of a fan. Filter Sizing The AX Series textile filter is currently available in two sizes. Model AX I 0 is designed to handle resi- dential waste for homes up to three bedrooms with a design flow of up to 450 gallons per day per Table 3. Model AX20 is designed to handle larger homes and commercial systems with a peak design flow of up to 900 gallons per day per single AX20. Residential waste must meet the criteria in the "Residential Strength Wastewater" table, below. A four-bedroom home requires two AXlO pods or one AX20. Consult Orenco or an authorized Dealer for larger system designs. Table 2. Residential Strength Wastewater (Influent Characteristics) Chara!<!~ristii< Av~rag!l Wilek!~ f!lak Rar!:l~ Ei>i<!:!:!l mg/L mg/L mg/L BOD 150 200 300 TSS 40 60 150 TKN-n 65 75 150 G&O 20 25 25 Maximum allowable wastewater strength pumped to an AdvanTex™ Treatment System is ·Residential Strength Wastewater.· Residential strength wastewater is defined as primary sewage effluent from a septic tank that does not exceed the above parameters. Processing Tank Requirements Homes up to four bedrooms require a minimum two-compartment, 1500 gallon tank with minimum 12- square-inch flow-through port(s) at 60-70% of the lowest normal liquid level (see "Typical Liquid Level Positions" drawing). The first compartment should have a minimum 1000 gallon volume. In larger residential systems, the first compartment should be sized at approximately 2/3 to 3/4 of the total processing tank volume. All tanks must meet minimum structural requirements and be completely watertight, including the riser/tank connection. See structural and watertightness criteria in Orenco 's "General Specifications,'' document NDA-DG-SPEC-1, for detailed recommended specifications. Recommended Tankage and Filter Units The following chart summarizes the recommended tankage and number of textile filter units based on the number of bedrooms in the home. Recommendations are based on typical average daily flows of 50 gpcd. (The typical range is 40-60 gpcd.) Recommendations also assume that residential peak weekly average flows are typically two times nor· mal average daily flows (i.e., Qpwa = 2Qa) and peak weekly average flows meet typical regulations governing gpd-to-bedroom ratios. EDA·ATJ<.2 Rev. 2.3 !E> 7/19Al1 P1ge2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ------------- Design Criteria, cont Table 3. Recommended Tankage and Filter Units B~Q[QQffiS Qi<!<JJ!2ants"' Ma11, :e!:ak Ma11. Av~rage fmc~ssing Tank** AX Units maximum niaximum gpd gpd minimum size (gals.) models 3 4 450 225 1500 AXlO 4 8 900 450 1500 AX20 5 10 1200 600 2000 AXIO+AX20 6 12 1400 700 3000 Two-AX20 *Systems with occup8ncies greater than the maximums shown or greater than eight occupants require a design with multiple units based on a minimum of 2.5 ft' of surface loading area per capita. **In Mode 3 designs for cluster and commercial systems, the primBry compartment also becomes a recirc comp8rtment. Consequently, the processing tank capacity should be increased by at le8st a fBqtor of two. Call Orenco for assistance. Design Loading Rates Orenco's suggested design loading rates are based on typical per capita flow rates and average strength characteristics expected from residential type installations, as shown above. Performance (i.e., filter siz- ing) is a function of the expected typical loads with periodic weekly highs. (Typically, the daily mass loading is based on the expected daily flows and parameter strength.) The void capacity, surface area per unit volume, and moisture-holding capacity of textile are many times greater than that of sands or gravels, thereby enabling equal treatment at higher loading rates. If the load- ing rate (or mass load) needs to be reduced to meet discharge limits, it's a simple matter of adding addi- tiQnal mQdJJlar units. Operationally, the module's flexible and easily serviceable features make AdvanTex™ units an ideal, efficient, and effective solution for all wastewater treatment applications with domestic waste characteristics. For residential, cluster, and commercial applications in which wastewater strengths exceed the average (because oflow water use, special cooking or food processing practices, or other special circumstances), system sizing can be made proportionate based on the actual or expected mass loads vs. typical mass loads. AdvanTex™ is an excellent treatment system for commercial applications. Call Orenco's Systems Engineering Department for information on commercial applications. Pumping Equipment Pumping equipment shall be an Orenco Biotube~ pump package. Timer Settings end Recirculation Ratios The operation of the pump in the second compartment is controlled by a programmable timer in the con- trol panel, which allows the pump to dose the filter for short periods (usually less than a minute), from a minimum of 72 to a maximum of 300 times a day. This frequent "micro-dosing," which optimizes the treatment process, occurs 24 hours a day to maintain the proper biological environment. At startup, the timer should be set to achieve a 4 to 1 recirculation ratio, based on the expected actual average daily flow. Depending on the system's performance and measured actual flow, the recirculation ratio can be adjusted. EDA·ATJC.% Rev. 2.3 Cl 7/1M11 P1ga3 Designed By: EB Onnrn By: U.S. Potenll 5.5Jt.M• Ol'lll $,4$0,561 4,d9.J2J Md 5,02.6J5 Approved By: Oro•illQ: I Ot/lfr Pottrdt Ptnditig O 1na ar.nco Syst"""-i ti('. Datt ~proved: Revision: .:; " 1 , "\ I I I I I I CH/111$ JoRIAN rrt•' Typical Uqtld Level Poolllons for Residential AdvenTex• Trealmerl wfth MVP Control Pane OF I Drowin9 No. Dote: '112/0fJ Scale: r • l'-o· Orenco Systemst> ......... AdvanTex"'Treatment System AX lo Series -Mode 3a Discharge Filtrate Inlet Riser/lid -------;:=:::...-rn; Recirculating Splitter Valve (RSV) with Quick Disconnect Slope------, Top View ------Advontex Filter ~-----2" Dia. Vent 24" Dia. PVC Riser/Lid (min. 1/8"/lt.) -·~~~~~~=~~f-=±r: Discharge Filtrate f Inlet -~~11rH 2 Compartment Tank Biotubcf Pump Package Side View EndV18W c • .5 0 z ~ c 'i e C> di- ~ ~ ~ :. " '- C; ;::; ;::: ~ 0 C> .;; ~ ~ ~ ~ Design Criteria, cont AdvanTex™ Control System Critical to the success of the AdvanTex Treatment System is the method in which the effluent is loaded onto the AdvanTex Textile Filter. Timer controlled applications have proven over the past three decades to play an essential role in optimization of the performance of both fixed and suspended growth biological systems. A timer-controlled pump in the processing tank periodically doses effluent to a distribution system on top of the AdvanTex Filter. Each time the filter is dosed, effluent percolates through the filter media and is treated by naturally-occurring microorganisms that populate the filter. During periods of high flow, a timer override float will temporarily modify the timer settings to process the additional flow. Conversely, during periods of low flow, the timer settings can be modified to reduce loading onto the AdvanTex filter. VeriComm remote telemetry control panels and web-based monitoring system are recommended but not required for all AdvanTex Treatment Systems. VeriComm gives wastewater system operators and maintenance organizations the ability to monitor and control each individual system's performance remotely. There are several additional operational benefits associated with telemetry-based controls, including Advanced Control Logic -functions that activate in the event of component malfunction to diagnose the system using pre-established trend data and, if necessary, modify the operation of the sys- tem until it can be serviced. VeriComm also provides additional alert and alarm functions to notify the operator in the event that trend data indicate potential problem conditions (e.g. high flows). Surge Volume For most residential applications, the recommended surge volume is approximately 150 to 250 gallons. The actual surge volume used should be approximately 50 to 100% of the actual average daily flow. The surge volume is the volume between the normal low liquid level and the high water alarm float. The normal low liquid level is the level at which 100% of the filtrate returns to the tank. For most res- idential installations, the low liquid level will be approximately 5 to 6 inches below the top of the RSV Cage. See the "Typical Liquid Level Positions" drawing for description of typical RSV and float set- tings for residential systems installed in two-compartment tanks. Cold Weather Considerations Both the AXlO and AX20 are available with two inches of insulation attached to the bottom of the lid. Installing insulation around the sides of the filter pods themselves is optional and is done onsite as needed. Other cold weather considerations include standard practices used with most onsite pump systems, such as allowing all lines to drain, insulating processing tank lids, and backfilling risers with pea gravel if frost-heave is a concern. Consult Orenco if supplementary options need to be considered. EDA·ATJ<.2 Rev. 2.3 II> Jn9,Q1 P1914 • OPERATION AND PREVENTATIVE MAINTENANCE AGREEMENT Street Address: SAMPLE Legal Description: SCG Enterprises, Inc. will perform operation and maintenance services for the Onsite Wastewater System serving the subject site as outlined below: Processing Tank: During each visit, the scum and sludge layers in the processing tank (septic tank) will be measured. A recommendation for pumping will be made when the scum thickness exceeds four inches, or the sludge thickness exceeds 24 inches. Pumping System: During each visit the pump system will be observed to verify proper performance. The pump will be operated manually. The vault screen will be pulled and cleaned. Recirculating Filter: The filter will be observed for signs of excess organic build-up or improper performance. The media will be cleaned or replaced as necessary. Drain Field: The surface area around the drain field will be observed for signs of failure such as lush vegetation growth or effluent ponding. Liquid levels within the field will be observed through the observation pipe and levels recorded. Items that are not included in this contract include: 1. Corrective and/or repair maintenance if necessary, other than covered under warranty. 2. Effluent sampling and analysis if applicable. 3. The cost of tank pumping. The goal of SCG Enterprises, Inc. is to observe the operation, and perform maintenance for the onsite wastewater system to allow for proper, Jong term functioning of the system and compliance with the conditions of the installation permit. SCG Enterprises, Inc. will perform operation and maintenance of the system as outlined for $120.00 per visit with two visits per year ($240.00 per year). Payment in full for the first two years is required prior to initiation of the agreement. This agreement period will be for the 2-year period between October 2000 and October 2002. Property owner or authorized representative Date SCG ENTERPRISES, INC. authorized representative Date Payment Received----------- .. • CDPHE-WOCD Fax:3037B20390 Jul 3 2001 10:34 P.02 I I STATE OF COLORADcb Bill 0....111, Covtmor )11~ £.. Nurton, Execud¥C OirectOf O«/lc•wd to pt'04«tlf18 •nd lmprovln& the he.a/th •11d Mvfrontnc:nt of the p«Jpk of Cok>rtKJo .C300 Chtrty Qo.elc Dr. S. Lab«atory and Radiat10r1 Servieti Oi"is.lun Denwr, Color.do 80246-1 S~ 91 00 Lowry Blvd. Phnr>e ()0.l) ~9l·lOCIO Denver, O>lor.>do R02J0.~92B TOO Line (JO" 6' 1°7700 (1031 692·3090 Loc•rcd In Gl<nd•le, Colmada Colorado Depanrnt11t of Publi• Heald! !I • htrp:!/\tww.cdph<.sr..,.<v.us July 3, 2001 William Cagle :BuaincssDcvclopmcnl Manager Orenco Systems lnoolporated U4 JJrway Avenue Su1herlill, Oll 97479 Dear Mr. Cagle: and Emirllnment I .. • ! ' On behalf of the Colorado Individual Sewage Disposal Systems Technical Advisoiy Conunitt= (ISDS TAC) I would like to lhanl::you for llking the time to make a presencilion before the TAC on April 9, 2001 and answering queslio11$from lhe I mcrnbc11. · i I The TAC has had an opporniniry 10 review and discuss lho materials, dated October 30, 2000 and information p<esented ~ the April 9, 2001 TAC =ting regarding the AdvanTcic AX arid RX treatment Wilts. It is tho widcrslallding of the TAC ll18l the n:q~ from Oren co Is merely for cortlficaii.on of the AdvanTex AX and RX treatment uniu as approved technology lh conformance with the provisions of Section XI of the Colorado State Boazd ofHealth Guidelin<s Dn·lndividual Sewage .J · Disposal Sysi.m.s, /Wvis.d 2000 (Guidelines). The TAC further understands the ll8lllrO of Ille requesl to include no n:quc11 for wri.ances from sizing. siting. selbadc distances or any provision of the Guidelines. : ! On the basis of the inforrnalion presented, the na~ of the tequ"'1, and the recommendation nftbc Colondo Individual I Sewa&e Dlsposal Systems Technical Advisoiy Commiaoe, !ht Waller Quality Conirol Division hereby certifies the O=co Adva.nTex AX and RX treatment Wilts for usc in Colorado subj~ to the follomng conditions and limilatiom: l ' I • CertiJicalion of !his product by the Colorado Depanmtnt of Public Health and Environment does not ~ j aoocp1ancc by any indivldual'ooui11y wilhin Colorado. Local hcallh agencies have !he authority to cnforoe ~ more 61ringent than those found acccpUlble by the Sllllt. Under this authority, loc'al health 98enCiC$ may elect not to acknowlod&c this ClCl1illcalion, may ac<:ept Ille ccr1ification as issued, or may acoept !ht cettifioalion subject to ! conditions or limirations more stringent than those oonraincd herein. ! . I • • No reductions ftom aJ1Y sizing, siting or setbaclc criteria contained In the Guid1lines is permitted solely on 1he ~is of use of the AdvanTcx Systems. • It ls the recommendation of Orenco Systems, Inc. tha! the AclvanTex treatment units be used lo treat rosldcnlial nrcngth WUICWalCr not exceeding the following influent param<1CIS: Residential Stren:th Wastewater (luOucnt Characteristics) Characterirdc Avenge Weekly Peak Rarely Exceed mg/L mg/L mg/L BOD 150 100 300 TSS 40 60 150 TKN·n 65 75 !SO G&O 20 25 15 . ' "' CDPHE-lilXD William Cagle BusiDCSS I>cvclopmcnt Mana,gcr Oreru:o S)'Sll!ID& lnCOJpOcited July 3, 2001 Page 2 of2 - Fax:3037820390 Jul 3 2001 10:34 P.03 • Sizing of 1h; AdvanTcx ~ Wlits shall be in conformance with the following sizing chan as supplied by Orenco Systems lnc:orporated. AXUnill Model AXlO AX20 AXIO/AXJO 'fw(>.AX20 .. AdvanTc.x"' Treatment Unit Filter Sizing Chart• Bedroom• maximum 3 4 5 6 Procu1lng Ta.ok minimum stze(gals.) JSOO ISM 2000 3000'" •This table Is developed based on memng secondary cflluent quality and the performance of routine maintenance. •• For mulliple tanks, consult~ Systems•, l'llc. orlhe local AdvanTex"' dealer for tank configuration and pW:cmcnt al the splina: valve. I. I ' ' ' The use of.;. AdvanTex tttatment unit to serve any commen::i.al, Industrial, or multi.family system requires that b . design of the enti!c sys1em be prepared by a professional engineer registered in the S1ale of ~lorado. : • • • ' ! Thk ccnlflcallon lncludcg lbe application of the Advan.Tex treatment wilt to both new construction a< wcll u J repair/modification of existing onsile systems. A pmnit shall be obtained from the local. health aulhorily prior lhe lns1allalion of 811 AdvanTcx trealmcllt wilt ! ' ' The tcnn "design fiow" as used in materials p1Cp8Rd and distributed by Orenco Systems; Im:. does not con!onn ~ . the tmn "design flow" as contained in the Gultkltnes On Individual Sewage Disposal Syswru. While this j · ccrtificatlon acoepti; the l'OC(lnun=dalions of Orenoo Sysu:ms regarding the ll:dng aiteria.for the AdvanTex uni~ both the septic tank and soil absorption field must ruet sizing criteria for design flow as defined in !he Gutdeu114. As with all on site wastewater ll'e.a!rl1cnt systems, rout!M maintenance, in conformance with the manufacturer's j . recorrunendalions, Is neocs681)' to achieve the treatment potenlial of the product/system. Therefore, ii ic recommended that all owncn of lhcse systems be p.ro.iclcd with opcraliM and maintenance (O&M) pidancc from the manufacni=, • If you have any quenions regarding the contents of this certificatioo. please contact me at (303) 69Z-3574 or 10m bsnnet!@!!ll!e co us at Your convenience. Thomas Bennttt Environmental !>rotection Specialist xc: Local Health Agencies 'Tcdu.J...J Advi""')' Comn>.lttoo M:mb<:ro