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HomeMy WebLinkAboutInstallation Observation Letter 5020 County Road 154 Glenwood Springs, CO 81601 phone: (970) 945-7988 fax: (970) 945-8454 email: kaglenwood@kumarusa.com www.kumarusa.com Office Locations: Denver (HQ), Parker, Colorado Springs, Fort Collins, Glenwood Springs, and Summit County, Colorado January 17, 2025 Puma Paw, LLC Attn: John Hildebrant 1793 County Road 219 Rifle, Colorado 81650 jhilderbrant42@gmail.com Project No. 23-7-190.02 Subject: Certification of Onsite Wastewater Treatment System, Proposed Residence, 1793 County Road 219, Garfield County, Colorado Dear John: A representative of Kumar & Associates observed the installation of the Onsite Wastewater Treatment System (OWTS) for the ADU at the subject site as required by the Garfield County Environmental Health Department. Our observations and recommendations are presented in this report. The services are supplemental to Kumar & Associates agreement for professional services to you dated March 15, 2023. We previously designed the OWTS for the Residence as submitted in our report dated July 17, 2023, Project No. 23-7-190.02. The system was designed for three bedrooms. We performed our as-built evaluation on July 12 and 22, 2024. The OWTS components observed included: sewer line, cleanout, septic tank, distribution box, effluent line and soil treatment area (STA) and the locations of these components. The installation and locations of the system components were verified as shown on Figure 1. Pictures of the OWTS components made during the site visit are included with this report. The distance locations to the septic tank shown on Figure 1 were made by taping. The septic tank was changed from a Valley Precast 1,000-gallon, two-chamber tank to a Norwesco 1,500-gallon, two-chamber tank. The Infiltrator Quick4 Plus standard chambers were changed to Infiltrator H-20 chambers. The Tuf-tite 4-Hole distribution box was changed to a concrete 8-hole distribution box. The changes are acceptable to us. On July 12, 2024, an additional profile pit (Profile Pit 3) was excavated at the location shown on Figure 1. The soils in Profile Pits were similar to the soils previously encountered in Profile Pits 1 and 2. Below about 1 foot of organic topsoil, the soils consisted of Sandy Loam to the pit depth of 8 feet. No Free water was encountered in the pit nor indications of seasonally high groundwater were observed at the time of excavation. It is our opinion that the OWTS was installed in general conformance with the above referenced design. Kumar & Associates OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE 1793 COUNTY ROAD 219 GARFIELD COUNTY, COLORADO Project No. 23-7-190.02 Photograph 1: Cleanout and sewer line exiting building. Photograph 2: Norwesco 1,500- gallon, two-chamber septic tank. OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE 1793 COUNTY ROAD 219 GARFIELD COUNTY, COLORADO Project No. 23-7-190.02 Photograph 3: Norwesco 1,500- gallon, two-chamber septic tank nameplate. Photograph 4: Effluent filter at septic tank outlet OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE 1793 COUNTY ROAD 219 GARFIELD COUNTY, COLORADO Project No. 23-7-190.02 Photograph 5: Sewer line from residence to septic tank. Photograph 6: Effluent line from septic tank to distribution box. OWTS PHOTOGRAPH LOG PROPOSED RESIDENCE 1793 COUNTY ROAD 219 GARFIELD COUNTY, COLORADO Project No. 23-7-190.02 Photograph 7: 8-hole concrete distribution box. Photograph 8: Soil treatment area (STA)