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Home My WebLink AboutOWTS Installation Oberservations 08.02.2025CBO Inc. 129 Cains Lane Carbondale, CO 81623 970.309.5259 carla.ostberg@gmail.com August 2, 2025 Project No. C1860 Todd Christman todd@unionpropertycapital.com Onsite Wastewater Treatment System (OWTS) Installation Observations 5970 CR 109 Garfield County, Colorado OWTS Permit SEPT-8817 Todd, CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on multiple occasions in the fall of 2024 and through summer of 2025 for the subject property. Timberline Excavation installed the system. The OWTS design is based on 4-bedrooms. An average daily wastewater flow of 525 GPD was used. The existing septic tank and STA were abandoned. The 4-inch SDR -35 sewer line exiting the residence had 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 Orenco® Biotube 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 filters in these septic tanks should be cleaned annually, or as needed. The floats were set to dose 78 gallons each pump cycle. The control panel for the pump is located within line of sight of the septic tank. Effluent is pressure dosed through a 1.5-inch diameter pump line to a mounded, unlined sand filter. The mound is positioned against the existing 6-foot high bank to blend the mounded 13’ x 50.5’ area into the topography on the property. Elevation 6085.5’ was identified and flagged prior to construction of the STA. The BASE of the sand filter was built up 3-feet from this elevation. Sand was placed below the base of the sand filter to reach this starting elevation. The mound consists of a 3-feet of sand filter material above native grade. A gradation of the sand media is enclosed . 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 is placed at a high point in an insulated riser with access from grade. Four 39” wide GeoMat™ are placed on the 13-foot wide bed. Level, 1.5-inch diameter manifolds connect two laterals in each zone. Laterals are 1.5-inches in diameter with 5/32-inch diameter orifices facing down, spaced 3-feet on center, installed on the GeoMat™ with the filter fabric over the laterals. Laterals are placed 2-feet from the edges of the bed leaving 3-feet between center of laterals. Each 1.5-inch diameter lateral ends in a sweeping ell facing up with a ball valve for flushing. Inspection ports are placed into the sand filter material on each corner of the bed. The mound has a minimum 3:1 slope (horizontal:vertical). Soils in the sloped perimeter areas of the mound are well draining and able to support vegetative growth. 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 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: 5970 County Road 109, Carbondale_ Parcel No.: 239328318001 Owner Name: Todd Christman Owner Phone: (415) 260-4165 Designed By: CBO, Inc. Designer Phone: (970) 309-5259 Contractor: The Home Group Inc. Contractor Phone: (970) 319-7378 Number of Bedrooms: _4_ Minimum Tank Capacity: 1,250-gallon Minimum Absorption: 656.25 ft2 OWTS PERMIT KEEP AVAILABLE AT PROJECT SITE Permit Number _SEPT-8817_______________________________ Permit Type X New X Repair X Remodel/addition X Tank only Issue Date _08/01/2024____________________ Expiration Date_08/01/2025_________________ Permit Conditions: This OWTS Permit is approved on the condition of compliance with the report and design as submitted by CBO, Inc. dated July 20, 2024. 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 four-bedroom residence. 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 656.5 ft2 of STA. The new STA will consist of a 13 feet wide by 50.5 feet long unlined sand filter bed consisting of 3-feet of secondary sand media. The sand filter will have two zones of two laterals per zone. Distribution laterals are to be 1 ½ inch Schedule 40 PVC, with 5/32-inch orifices 3- feet on center and the laterals ending in flushing valves at the distal end of the laterals. The distribution laterals shall be placed in GeoMat distribution material with the orifices facing downward. Inspection ports are to be installed at each corner of the bed. Maintain all setbacks and elevations as designed. To assist in scheduling, please contact Garfield County Public Health (970-945-6614 ext. 8150) to notify the start of OWTS construction. Contact the designer and Garfield County Public Health at least 48 hours prior to requesting final inspection of the installed system prior to backfill. NO OWTS COMPONENT SHALL BE BACKFILLED WITHOUT PRIOR APPROVAL FROM GARFIELD COUNTY PUBLIC HEALTH AND THE DESIGNER. 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. 08/01/2024 Issued By: Garfield County Environmental Health Department Date 832‐R‐13‐002