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HomeMy WebLinkAboutFinal Installation Observations 09.11.2024CBO Inc. 129 Cains Lane Carbondale, CO 81623 970.309.5259 carla.ostberg@gmail.com September 11, 2024 Project No. C1675 Matt and Julie Fadden c/o Richard Stumpf richard@rjstumpf.com Onsite Wastewater Treatment System (OWTS) Installation Observations 69 Weeping Willow Lane Garfield County, Colorado OWTS Permit SEPT-7494 Matt and Julie, CBO Inc. observed the installation of the onsite wastewater treatment system (OWTS) on December 16, 2022, March 30 and September 9, 2024 for the subject property. Mountain Works installed the system. The well location changed from our original design documents. We have approximated the location on the record drawing. We verified the well is greater than 50-feet from the septic tank and greater than 100-feet from the soil treatment area (STA). The OWTS design is based on 5-bedrooms. An average daily wastewater flow of 600 GPD was used. The 4-inch diameter SDR 35 sewer line exiting the residence has a double-sweep clean out and a minimum 2% grade to the septic tank. The system installation included a 2000-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. There is also a filter in the second compartment of the septic tank. This filter must be cleaned annually, or as needed. The septic tank was anchored with Deadmen because of the high seasonal groundwater table. The floats were set to dose approximately 65 gallons each pump cycle. The control panel for the pump is located within line of sight of the septic tank. Valley Precast out of Buena Vista performed start-up of the pumping system. The start- up was conducted with temporary power. Effluent is pressure dosed through a 1.5-inch diameter pump line to a partially mounded, unlined sand filter. The sand filter is divided into two beds, each 12’ x 31.5’ with some room between beds for plumbing for a total approximate length of 65-feet. The excavation for the sand filter began 2.0-foot below native grade (6206’). A minimum of 3-feet of sand filter material was installed in the over-excavated footprint, resulting in 1-foot of sand filter material extending 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 6404. The pump line was placed in a Schedule 40 conduit where it crosses the driveway. The ADV was placed at a high point of each zone in an insulated riser with access from grade. Level, 1.5-inch diameter manifolds connect two laterals on each bed. Laterals are 1.5-inches in diameter with 5/32-inch diameter orifices facing down, spaced 2-feet on center, installed on the GeoMat™ with the filter fabric over the laterals. Laterals were placed 2-feet from the edges of the beds leaving 3-feet between laterals and 2-feet between each section connected by the ADV. Four 39” wide GeoMat™ were placed on the 12-foot wide bed. Each 1.5-inch diameter lateral ends in a sweeping ell facing up with a ball valve for flushing. Laterals were covered by the GeoMat™ separation fabric and at least 1-foot of topsoil. Inspection ports were placed into the sand filter material on each corner of the beds. The mound must has a minimum 3:1 slope (horizontal:vertical); therefore, the basal area will extend approximately 9-feet beyond the sand filter on all sides (with a mound height of approximately 3.0-feet above native grade). Soils in the sloped perimeter areas of the mound must be well draining and able to support vegetative growth. This soil must be approved by this office prior to installation. The mound must be crowned in a manner to promote drainage off the STA. On September 9, 2024 we found the pumping system to be in the OFF position and the alarm light on. We turned the pump to the ON position and cycled through the ADV. We worked with the electrician and after some connecting/disconnecting in the panel, the audible alarm sounded normally. We also tested the pumping system via the floats and the pump kicked on and off normally, and the alarm sounded when the high water float was lifted. Weeds have grown over the STA. We recommend removing the weeds, leveling the STA with some topsoil, and planting hearty, native grasses this fall. Irrigating the area lightly to establish the grasses is acceptable. 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 Valley Precast septic tank Pump line exits the tank Clean out between the house and septic tank / Sewer line exiting foundation Septic tank anchored with deadmen Well drilled to the southwest of the residence / inlet tee View of septic tank / blue board over pump line / pump chamber Construction of STA ADV 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 Weeping Willow Lane, Carbondale, CO 81623 Parcel No.: 239336319009 Owner Name: Julie and Matt Fadden Owner Phone: (303) 514-9463 Designed By: CBO Septic Consulting Designer Phone: (970) 309-5259 Number of Bedrooms _5__Minimum Tank Capacity 1,750-gallon__Minimum Absorption_750 SF OWTS PERMIT KEEP AVAILABLE AT PROJECT SITE Permit Number _SEPT-7494________________________ 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 March 15, 2022. Changes must be approved by Garfield County Public Health and the designer prior to construction. The new OWTS will serve a new 5-bedroom residence and equipment barn. The system will consist of a new, two-compartment minimum 2,000-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 750 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 feet below grade and one foot 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 11/28/2023 To Whom It May Concern: We have been to the following site: 69 Weeping Willow Lane, Carbondale, 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 832‐R‐13‐002