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Home My WebLink AboutOWTS Installation Observations 02.14.2023CBO Inc. 129 Cains Lane Carbondale, CO 81623 970.309.5259 carla.ostberg@gmail.com February 14, 2023 Project No. C1693 Mike Chmura mike@korultd.com Onsite Wastewater Treatment System (OWTS) Installation Observations 12750 Hwy 82 Garfield County, Colorado Permit Number SEPT-05-22-7506 Mike, CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on October 17, December 7, 2022 and February 14, 2023 for the subject property. Avalanche Excavation installed the system. An existing well on the property serves both residences potable water. The well was verified to be at least 50-feet from both septic tanks and at least 100-feet from the soil treatment area (STA). The new OWTS design was based on 3-bedrooms in the Main Residence and 2-bedrooms in the Accessory Dwelling Unit (ADU). An average daily wastewater flow of 750 GPD was used. The existing septic tank and STA serving the main house remains in use at this time. The main house may connect to the new OWTS in the future. At that time, the existing 4-inch diameter sewer line serving the main house will be replaced. The sewer line must be encased (See Encasement Detail W3.0/4 of the OWTS Design Packet dated August 20, 2022) where it comes within 50-feet of the well. There must also be a cleanout a minimum of every 100-feet. At the time the main house is connected to the new OWTS, the existing septic tank and STA must be properly abandoned. Documentation of this work must be provided to this office and Garfield County Environmental Health Department. The 4-inch diameter SDR-35 sewer line exiting the ADU has a double-sweep clean out and a minimum 2% grade to the septic tank. The system installation included a 1500-gallon, two-compartment Infiltrator® poly septic tank with an effluent filter on the outlet tee, followed by a 500-gallon, single-compartment Infiltrator® poly pump chamber with an Orenco® Biotube Pump Vault and an Orenco® PF3005 pump. The floats were set to dose approximately 85 gallons each pump cycle. Both the septic tank and pump chambers have effluent filters that must be cleaned annually, or as needed. Valley Precast out of Buena Vista performed start-up of the pumping system. The control panel is located within line of sight of the pump chamber. Effluent is pumped through a 1.5-inch diameter pump line to an Orenco® automatic distributing valve (ADV), model 6403. The ADV was placed at a high point in the system in an insulated riser with access from grade. Effluent is pressure dosed through 1.5-inch diameter distribution lines to three beds, each 7’ x 44.5’. The over-excavation extended approximately 4-feet below grade in all beds and no partial mounding was necessary. A minimum of 3-feet of sand filter material was installed in the over-excavated footprint. A gradation of the sand media is enclosed. 2-22-2023 Laterals are 1.5-inches in diameter with 5/32-inch diameter orifices facing down, spaced 3-feet on center, installed on the center of each GeoMat™ with the filter fabric over the laterals. Two 39” wide GeoMat™ sheets were placed on the 7-foot wide beds. Each 1.5-inch diameter lateral ends in a sweeping ell facing up with a ball valve for flushing. Valves were placed in a 10-inch sprinkler box for access. Laterals were covered by the GeoMat™ soil separation fabric and at least 1-foot of topsoil. Inspection ports were placed at each corner of each bed. Ports may be cut to grade and covered with a valve box 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. Reviewed By: Carla Ostberg, MPH, REHS Romeo Baylosis, P.E. Wye fitting to a clean out View from well location (arrow indicates septic tank) Sewer line from ADU Septic tank View of pump chamber Inlet tee / septic tank Effluent Filter Sewer line from septic tank to pump chamber Pump chamber GeoMat fabric over laterals Laterals on GeoMat View of one STA Pump line from chamber Pump line Pump line Orifices in laterals Control Panel View of STA ADV Flushing valves Looking at ADV and STA 02/03/2023 To Whom It May Concern: We have been to the following site(s): 12750 HWY 82, Carbondale, Garfield County We have verified that the system was started properly. The System went through several cycles with no issues. Sincerely, Scott McIntosh Service Manager 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: 12750 Highway 82, Carbondale, CO 81623 Parcel No.: 239327100021 Owner Name: James M. Chmura Owner Phone: (970) 618-2383 Designed By: CBO Septic Consulting Designer Phone: (970) 309-5259 Number of Bedrooms _2__Minimum Tank Capacity 1,000-gallon__Minimum Absorption_375 SF OWTS PERMIT KEEP AVAILABLE AT PROJECT SITE Permit Number _SEPT-7506________________________ Permit Type X New X Repair X Remodel/addition X Tank only X Field Only X Amendment Issue Date 06/08/2022 Expiration Date 06/08/2023 Permit Conditions: This OWTS Permit is approved on the condition of compliance with the design as submitted by CBO Septic Consulting dated February 3, 2022. Changes must be approved by Garfield County Public Health and the designer prior to construction. The new OWTS will serve a new 2-bedroom Accessory Dwelling Unit (ADU). The system will consist of a new, two-compartment minimum 1,000-gallon septic tank set level with access to grade and a high-head pump in the second compartment of the tank. Effluent will be pressure-dosed to an automatic distributing valve (ADV) set level with access to grade at the high point of the system that will distribute effluent to 437.5 ft2 of STA. The new STA will consist of two unlined sand filter beds constructed of 3 feet of secondary sand material. The beds will be partially mounded, with 2.5 feet below grade and six inches above grade. The pump and effluent lines will be constructed of 1.5-inch diameter Schedule 40 PVC. The laterals in each bed will be connected with level manifolds, and the laterals shall have 5/32-inch diameter orifices facing down spaced every 2 feet on-center (O.C.), installed on GeoMat placed directly on the sand. Inspection ports are to be installed at each corner of each bed. 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. 06/08/2022 Issued By: Garfield County Environmental Health Department Date 832‐R‐13‐002