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Home My WebLink AboutOWTS Installation Observations 01.12.2026CBO Inc. 129 Cains Lane Carbondale, CO 81623 970.309.5259 carla.ostberg@gmail.com January 12, 2026 Project No. C1934 Brett Wamsley Brettwamsley1@gmail.com Onsite Wastewater Treatment System (OWTS) Installation Observations 54 Pine Street Garfield County, Colorado OWTS Permit SEPT-9125 Brett, CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on August 4, 2025 for the subject property. E&L Trucking installed the system. The existing septic tank was abandoned by pumping the tank and crushing the top, bottom, and sides and filling the void with onsite material. The existing soil treatment area (STA) was abandoned in place. The OWTS design is based on 4-bedrooms. An average daily wastewater flow of 525 GPD was used. The piped irrigation ditch that runs along the north east side of the property is greater than 10-feet from the STA. The water line was re-routed off Pine Street to the east along the southern portion of the property where it enters the addition. The water line and sewer line do not cross. A new sewer line was installed from the existing portion of the residence and an additional sewer line from the addition to the south. Both 4-inch diameter sewer lines have double-sweep clean outs and a minimum 2% grade to the septic tank. The system installation included a 1500-gallon, two -compartment Valley Precast concrete septic tank with an Orenco® Biotube Pump Vault and an Orenco® PF3005 pump in the second compartment of the septic tank. The effluent filter in this chamber must be cleaned annually, or as needed. The floats were set to dose approximately 65 gallons each pump cycle. The control panel for the pump was located within line of sight of the septic tank. Valley Precast performed start-up of the pumping system. 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. Effluent is pressure-dosed to through 1.5-inch diameter distribution lines to two 10’ x 33 beds. Three feet of sand filter material will be installed in the over-excavated footprints. A gradation of the sand media is enclosed. 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 were placed 2-feet from the edges of the bed with 3.0-feet between the laterals. Laterals were connected with 1.5-inch diameter level manifolds. Three 39” wide GeoMats™ were placed on the 10-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. 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. Carla Ostberg, MPH, REHS Septic tank Clean out near residence Inlet tee Pump chamber with filter View of control panel View of ADV from pump chamber ADV and beds Pump line exits tank 10' 33' 1.5" DIA SCH-40 LEVEL MANIFOLD FLUSHING VALVE AT END OF EACH LATERAL INSPECTION PORT AT CORNER OF EACH BED (3) 1.5" DIA SCH-40 PVC LATERALS W/ 5 32" DIA ORIFICES FACING DOWN COVERED WITH ORIFICE SHIELDS (2) 10' x 33' PRESSURE DOSED, OVER-EXCAVATED, UNLINED SAND FILTERS (MIN. 3' ASTM C-33 CONCRETE SAND) WITH THREE 39" WIDE GEOMAT SHEETS EACH BED 1.5" DIA SCH-40 PUMP LINE. (MIN 1% DRAIN BACK TO TANK) ADV MODEL 6402 AT HIGH POINT, ACCESSIBLE AT GRADE 1.5" DIA SCH-40 PVC DISTRIBUTION LINE TO EACH BED 4" DIA SDR-35 SEWER PIPE WITH CLEANOUT MIN 2% FALL TO TANK 1500-GALLON TWO-COMPARTMENT CONCRETE SEPTIC TANK WITH AN ORENCO PUMP PACKAGE IN THE SECOND COMPARTMENT, RISERS AND LIDS TO GRADE EXISTING SEPTIC TANK TO BE ABANDONED EXISTING 12' X 53' STA TO BE ABANDONED (LOCATION APPROXIMATE) 4-BEDROOM RESIDENCE DRIVEWAY PROPERTY LINE10' SETBACK PI N E S T R E E T BM 100' = FF GARAGE 100' TO WELL (APPROX.) PIPED IRRIGATION DITCH WATER LINE ENTERS HOUSE MIN. 10' TO IRRIGATION DITCH MIN. 5' TO WATER LINE Wamsley Residence 54 Pine Street Garfield County, Colorado Project Number: C1934 Date: 01/12/2026 Designed by: CBO Reviewed by: KC Drawn by: DD Sheet 1 0F 1 record N 0 10'20' SCALE: 1 = 20'=0" CBO Inc. 129 Cains Lane Carbondale, Colorado 81623 Phone 970.309.5259 carla.ostberg@gmail.com 08/05/2025 To Whom It May Concern: We have been to the following site: 54 Pine Street, Carbondale, Garfield County, CO 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 verified for functionality. Control panel verified of functionality. - The high-level alarm functions upon activation at control panel and all are working to specifications set by both Valley Precast and the manufacturer. 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: 54 Pine St., Carbondale, CO 81652 Parcel No.: 239328409008 Owner Name: Brett & Maura Wamsley Owner Phone: (720) 425-6081 Designed By: CBO, Inc. Designer Phone: (970) 309-5259 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-9125_______________________________ Permit Type X New X Repair X Remodel/addition X Tank only Issue Date _04/10/2025____________________ Expiration Date 04/10/2026_________________ Permit Conditions: This OWTS Permit is approved on the condition of compliance with the report and design as submitted by CBO, Inc. dated January 17, 2025. Changes to the design and permit must be approved by Garfield County Public Health and the designer prior to construction. PRIOR TO INSTALLATION OF OWTS COMPONENTS, A SECOND PROFILE PIT SHALL BE EXCAVATED IN THE AREA OF THE PROPOSED STA AND A REPORT OF SOIL CONDITIONS SHALL BE PROVIDED TO GCPH. The new OWTS will serve a 4-bedroom residence that will result from a remodel. The new OWTS components will consist of a 1,500-gallon septic tank on the CDPHE approved list, set level with access to grade. A new screened high-head pump will be installed in the second chamber of the septic tank. Effluent will be pumped to an automatic distributing valve set at the high point of the system that will distribute effluent to 660 ft2 of STA. The new STA will consist of two 10ft by 33ft unlined sand filter beds, consisting of at least 3 feet of secondary sand media overlain by perforated distribution laterals placed in GeoMat distribution media. Distribution laterals are to be 1 ½ inch Schedule 40 PVC, with 5/32-inch orifices every 3-feet on center and the laterals ending in flushing valves at the distal end. The orifices are to be facing downward with orifice shields. Inspection ports are to be installed at each corner of the bed. Maintain all setbacks and elevations as designed. The existing septic tank will be abandoned in accordance with Garfield County OWTS Regulations. Proof of proper tank abandonment must be provided. 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. 04/10/2025 Issued By: Garfield County Environmental Health Department Date 832‐R‐13‐002