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Home My WebLink AboutOWTS Installation Observations 08.02.2025CBO Inc. 129 Cains Lane Carbondale, CO 81623 970.309.5259 carla.ostberg@gmail.com August 2, 2025 Project No. C1617 Dave DuMais Dave@dumaismail.com Onsite Wastewater Treatment System (OWTS) Installation Observations 3004 CR 127 Garfield County, Colorado Permit SEPT-7924 Dave, CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on July 10, 202 3 for the subject property. Wilson Construction installed the system. The OWTS design is based on 3-bedrooms in the existing residence and a proposed 1-Bedroom Accessory Dwelling Unit (ADU) over a detached garage. An average daily wastewater flow of 600 GPD was used. The sewer line exiting the residence was replaced with 4-inch diameter, SDR-35 sewer line and ha s a double -sweep clean out and a 2% grade to the septic tank. The sewer line existing the ADU is a 4-inch diameter, SDR-35 sewer line and has a double-sweep clean out and a 2% grade to the septic tank. This sewer line was placed in the same trench as the pump line to the ADV. The system installation included a 1500-gallon, two-compartment Infiltrator® poly septic tank with an Orenco® Biotube Effluent Filter followed by a 500-gallonInfiltrator® poly single -compartment poly pump chamber with an Orenco® Biotube Pump Vault and an Orenco® PF3005 pump. The filters in these septic tanks must be cleaned annually, or as needed. The floats were set to dose 80 gallons each pump cycle. The control panel for the pump is located within line of sight of the septic tank. Effluent is pumped through a 1.5-inch diameter pump line from the pump chamber to an Orenco® automatic distributing valve (ADV), model 6402. The ADV was placed at a high point in the system in an insulated riser with access from grade. Screened rock is placed below the ADV to support the ADV and to assure the clear pipes exiting the ADV remain visible for future inspection and maintenance. Effluent is pressure dosed through 1.5-inch diameter distribution lines to two 10’ x 46.5’ beds. Two-feet of sand filter material was installed in the over-excavated footprint. Three 39” wide GeoMat™ sheets were placed on each 10-foot wide beds. 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. Each 1.5-inch diameter lateral ends in a sweeping ell facing up with a ball valve for flushing. Valves are placed in a 10-inch sprinkler box for access. There are no cobble-sized (<2.5”) or greater rock in final cover over the GeoMat™. Inspection ports were placed at each corner of each bed. Ports were 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. Carla Ostberg, MPH, REHS 08/14/2023 To Whom It May Concern: We have been to the following site: 3004 CR 127, Glenwood Springs, Garfield County We have verified that the system was started properly. The System went through several cycles with no issues. - Amperage and voltage of control panel, floats, and pump are all within manufacturers specifications and tolerance at start up. - Floats verify for functionality. - High level alarm functions upon activation at control panel. If you have any questions, please do not hesitate to call me at 719-395-6764, ext. 13. 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: 3004 CR 127 Glenwood Springs_ Parcel No.: _218529400021 Owner Name: Dave Dumais Owner Phone: (972) 567-7222 Designed By: CBO, Inc. Designer Phone: (970) 309-5259 Number of Bedrooms: _4_ Minimum Tank Capacity: 1,500-gallon Minimum Absorption: 923 ft 2 OWTS PERMIT KEEP AVAILABLE AT PROJECT SITE Permit Number _SEPT-7924_______________________________ Permit Type X New X Repair X Remodel/addition X Tank only Issue Date _01/05/2023____________________ Expiration Date_01/05/2024_________________ Permit Conditions: This OWTS Permit is approved on the condition of compliance with the report and design as submitted by CBO, Inc. dated September 11, 2022. 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 an existing three-bedroom residence and a future one-bedroom ADU. The system will consist of a new, two-compartment 1,500-gallon septic tank set level with access to grade followed by a 500-gallon pump chamber set level with access to grade and a high-head pump in the pump chamber. Effluent will be pumped to an automatic distributing valve set at the high point of the system that will distribute effluent to 923 ft2 of STA. Floats will be set to dose 80 gallons per cycle with an estimate of 9 gallons of drain back. The new STA will consist of an unlined sand filter, consisting of 2 feet of sand and three laterals, two 10-feet wide by 46.5-feet long with 3 sheets of Geomat™ on each bed. Distribution laterals are to be 1 ½ inch Schedule 40 PVC, with 5/32-inch orifices 3-feet on center. 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. 01/05/2023 Issued By: Garfield County Environmental Health Department Date 832‐R‐13‐002