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Home My WebLink AboutOWTS Installation Observations 03.08.2024CBO Inc. 129 Cains Lane Carbondale, CO 81623 970.309.5259 carla.ostberg@gmail.com March 8, 2024 Project No. C1653 Victoria Stulgis Victoria.stulgis@gmail.com Onsite Wastewater Treatment System (OWTS) Installation Observations 187 Harmony Lane Garfield County, Colorado Permit Number SEPT-921-7130 Victoria, CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on June 7, 2022 for the subject property. Dennis Brown installed the system. The OWTS design is based on a 4-bedroom Main House and a 1-bedroom Accessory Dwelling Unit (ADU) above the Barn. Plumbing in the Barn will be an auxiliary use to the Main House and ADU. An average daily wastewater flow of 675 GPD was used. The 4-inch diameter SDR-35 sewer line exiting the Main House has double-sweep clean out and a minimum 2% grade to the septic tank. The system installation includes a 1250-gallon, two-compartment Norwesco® poly septic tank with an effluent filter on the outlet tee. Risers bring the manhole lids to grade for access. The sewer line has a clean out at least every 100-feet. The inlet tee was missing and will be installed on 3/11/2024. The 4-inch diameter Schedule 40 sewer line exiting the Barn/ADU has a double-sweep clean out and a minimum 2% grade to the septic tank. This sewer line runs under a driveway. The 4-inch sewer line from the Main House septic tank will tie into the sewer line from the Barn/ADU sewer line with a “wye” fitting. The system installation included a 1000-gallon, two-compartment Norwesco® poly septic tank with an effluent filter on the outlet tee. Risers bring the manhole lids to grade for access. Effluent filters in both septic tanks must be cleaned annually, or as needed. Effluent gravity flows to a distribution box, and then to five GeoMat™ trenches. The distribution box was accessible from grade with flow equalizers installed on each outlet pipe in the distribution box to assure equal flow to each trench. Each 36-inch wide trench has a minimum of 6-inches of sand filter. A gradation of the sand media is enclosed. 39-inch wide GeoMat™ was placed on top of the sand filter material the entire length of the trench. A 4- inch diameter perforated pipe was placed down the center of the GeoMat™, under the top layer of fabric. The installer also used black separation fabric over the GeoMat™. The STA consists of 5 trenches, each with 63 linear feet of 39-inch wide GeoMat™ for a total of 315 linear feet and 945 square feet. There was at least 4-feet of undisturbed soil between each trench. Inspection ports were installed at the beginning and end of each trench. The front inspection port was placed to the side of the GeoMat™ and the end inspection port was tied onto the end of the lateral. Ports may be cut to grade and placed in sprinkler boxes for access. The OWTS was generally installed according to specifications. This observation is not a guarantee of workmanship and/or parts and materials. CBO Inc. 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: 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 on the expertise of the installer, soil type, and weather conditions. Please call with questions. Sincerely, CBO Inc. Carla Ostberg, MPH, REHS Clean out at Barn Schedule 40 sewer line exiting barn View of sewer line from barn to septic tank / Septic tank serving Barn (inlet) Effluent in Barn septic tank (recommended handle extension) / inspection port Distribution box View of distribution / pipes bedded in sand View of trenches / GeoMat over min. 6” sand Clean out on main house sewer line prior to entering Barn tank / Main House septic tank View of Main House septic tank / House not constructed at time of photos. Photos from contractor 03/08/2024 Inlet tee missing (will be installed 3/11/24) View of septic tank looking towards house View of septic tank lids Looking towards barn and STA View of septic tank looking towards barn Inlet side of tank looking towards house Garfield County Public Health 2014 Blake Ave. Glenwood Springs, CO 81601 Phone: (970) 945-6614 ext. 8150 For inspections, call: 970-945-6614 ext. 8150 and call the Design Engineer, if applicable Project Address: TBD Harmony Lane, Carbondale, CO 81623 Parcel No.: _239128200198 Owner Name: Sungold Heights, LLC Owner Phone: (617) 943-9626 Designed By: CBO Septic Consulting Designer Phone: (970) 309-5259 Number of Bedrooms: 4 Minimum Tank Capacity: 1,250-gallon Minimum Absorption: 945 ft 2 OWTS PERMIT KEEP AVAILABLE AT PROJECT SITE Permit Number _SEPT-7130_______________________________ Permit Type X New X Repair X Remodel/addition X Tank only Issue Date _10/01/2021____________________ Expiration Date_10/01/2022_________________ Permit Conditions: This OWTS Permit is approved on the condition of compliance with the report and design as submitted by CBO Septic Consulting, Inc. dated September 7, 2021. Changes to the design and permit must be approved by Garfield County Public Health and the designer prior to construction. The new OWTS will serve a new 4-bedroom residence and 1-bedroom barn/ADU. The system will consist of a new, two-compartment minimum 1,250-gallon septic tank for the main residence and a new, two-compartment minimum 1,000-gallon septic tank for the barn/ADU set level with access to grade with effluent filters in the outlet tees of the tanks. Effluent will gravity flow to a distribution box set level with access to grade that will distribute effluent to 945 ft 2 of STA. The new STA will consist of five gravelless GeoMat trenches. Each trench will consist of six inches of secondary sand material on the bottom of the trench, with the GeoMat placed directly on the sand. The trenches will be 3-feet wide by 63-feet long. Inspection ports are to be installed at each end of each trench. Maintain all setbacks and elevations as designed. Contact the designer and Garfield County Public Health at least 48 hours prior to requesting final inspection of the installed system prior to backfill. Agreement All installations must comply with all requirements of the Garfield County OWTS regulations including but not limited to the conditions specified above. In consideration of the issuance of the permit, the applicant hereby agrees to comply with all laws and regulations related to the zoning, location, construction, and erection of the proposed OWTS and associated structures for which this permit is granted. The applicant further agrees that if the above said regulations are not fully complied with in the zoning, location, erection, and construction of the above described OWTS and structure, the permit may then be revoked by notice from the Health Department and immediately become null and void. The issuance of a permit and specifications of terms and conditions therein will not constitute assumption of liability, nor create presumption that the local public health agency or its employees may be liable for the failure or malfunctioning of any system. Permit issuance will not constitute a certification that the system, the equipment used in the system, or any component used for system operation will ensure continuous compliance with the provision of the OWTS Act, the regulations adopted thereunder, or any terms and conditions of a permit. Permit Approval Plans and specifications for the proposed OWTS have been reviewed and are considered satisfactory. Permission is hereby given to the property owner(s) to perform the work indicated in accordance with the Garfield County OWTS Regulation. This Permit will expire 1 year from the date of issuance unless construction on the system has commenced. An "as-built" drawing must be submitted and inspection of the system must be completed by GCPH before final approval of the system will be issued. 10/01/2021 Issued By: Garfield County Environmental Health Department Date 832‐R‐13‐002