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Home My WebLink AboutOWTS Installation Observation 12.12.24Page 14 of 17 TO: Mr. Ted White, Garfield County Env Health / Shania McCain, Env Health Specialist FROM: Rick L Barth, PE, SGM Civil Services DATE: December 12, 2024 RE: Umbrella Commercial Site OWTS Record Affirmation OWTS Permit SEPT-7909 In November of 2024 SGM was contacted by Terralink Structures on behalf of Loose Cannon for the commercial parcel 5169 County Road 154, south of Glenwood Springs. The site was a new construction on a previous light industrial yard for a commercial/business facility and warehouse. The original design report was submitted in the fall of 2022. Minor but understandable alterations have been made to the layout. Plumbing exits from the building warranted (for ease of construction) two separate connections that led to the relocated tank in the parking (as opposed to next to the driveway). The tank is traffic rated and has concrete topping above for load bearing. The Orenco pump system is in the tank and panel attached to the structure. The field is in the targeted location of the test pits, with ever so slight re-orientation just to fit the available flat space better. The final ADV was installed and grades/vegetative cover are per Reg 43 standards of relatively flat and non-irrigated grasses only. These alterations have been shown and were noted in the permit application in January. This memo is to provide our affirmation of that installation. The elements are in the appropriate locations or just with very mild alteration due to construction constraints, but nothing to alter design intent or function. Altitude Septic provided photos of the squirt test for the STA bed and such documentation is included. Please accept this letter as our affirmation of the OWTS installation for the above site associated with the record drawings of Fall 2024, provided by the installer, Altitude Septic. Our field walk affirm this as an accurate representation of the constructed conditions. Attachments: Photos Tank specification www .s gm-in c .co m GLENWOOD SPRINGS 118 West Sixth St, Suite 200 | Glenwood Springs, CO 81601 | 970.945.1004 Page 15 of 17 Photo of full bed. Snip screen of pump test PREPARED FOR: Valley Precast, Inc. 28005 CO. RD 317 Buena Vista, CO 81211 PERFORMANCE TEST FOR: Standard Septic Tank 1,500 Gallon Top Seam 5’-8” x 11’-0” x 5’-10” O.D. H-20 Loading SPECIALTY ENGINEERING SERVICES PROVIDED BY: Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 1 of 12 3/26/15 Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 2 of 12 Client: Job Number: 12-18.01 File Name: stdesign.xls Entered By: SDG Date:2/24/2015 PRECAST CONCRETE SEPTIC TANK Sheet: ________ of _________ WALL DESIGN BASED ON VACUUM TEST Denotes input field Tank Model Volume 1500 Gallons Length Width Height Outside Dimensions (ft) 11.00 5.67 5.67 Top Slab Base Slab Walls Member Thickness (in) 7.00 4.00 4.00 Joint Height 4.92 ft Weight 14780 lbs Ref ASTM C1227 **Vacuum 10.5 in Hg Geographic Area Uniform Load 756 psf Minimum Live Load 100 psf Safety Factor 1.5 Allowable Uniform Load 504 psf 80 psf - LL Surcharge Equivalent Fluid Pressure 40 pcf (Dry) 80 pcf (Saturated) Soil Weight 120 pcf Earth Fill (ft) 1.0 1.5 2.0 3.0 4.0 Dead Load (psf) 120 180 240 360 Maximum Live Load (psf) 384 324 264 144 504 Depth to bottom of tank (ft) 6.7 7.2 7.7 8.7 9.7 Design Depth (ft) 4.21 4.71 5.21 6.21 7.21 Lateral earth pressure at design depth: Water tbl (ft) Earth Pressure (psf) 0 417 457 497 N/A N/A 1 377 417 457 N/A N/A 2 337 377 417 497 N/A 3 297 337 377 457 N/A Dry 168 188 208 248 288 Water Table Depth (ft) 0 1 2 3 4 Maximum Fill Depth(Walls) (ft) 2.0 2.0 3.0 3.0 4.0 Maximum depth controlled by lateral soil pressure for water table <3' **Vacuum test results were provided by the client and have not been witnessed or independently verified by Concrete Engineering Solutions, LLC Wall Capacity Valley Precast CO 1500 Top-Seam Base Slab Capacity Project No. 15-18.01 Designed By: KRWB - 2/24/2015 Sheet 3 of 12Project No. 14-18.01 Designed By: KRWB - 3/2/2015 Sheet 3 of 12Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 3 of 12 Client: Job Number: 12-18.01 File Name: stdesign.xls Entered By: SDG Date: 2/24/2015 PRECAST CONCRETE SEPTIC TANK Sheet: ________ of _________ WALL DESIGN BASED ON VACUUM TEST DESIGN SUMMARY Notes: *Concrete Strength 6000 psi **Tank should not be drained during Vacuum Test Load 10.5 in Hg periods of high groundwater. Allowable Uniform Load 504 psf *Concrete Strength at time of vacuum test Uniform Live Load Table Earth Fill (ft) 1.0 1.5 2.0 3.0 4.0 Dead Load (psf) 120.0 180.0 240.0 360.0 0.0 Maximum Live Load (psf) 384.0 324.0 264.0 144.0 504.0 Maximum Fill Depth Table Water Table Depth (ft) 0 1 2 3 4 Maximum Fill Depth (ft) 2 2 3 3 4 Maximum depth controlled by lateral soil pressure for water table <3' Valley Precast Project No. 15-18.01 Designed By: KRWB - 2/24/2015 Sheet 4 of 12Project No. 14-18.01 Designed By: KRWB - 3/2/2015 Sheet 4 of 12Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 4 of 12 Project No. 14-18.01 Designed By: KRWB - 3/2/2015 Sheet 5 of 12Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 5 of 12 β β Project No. 15-18.01 Designed By: KRWB - 2/24/2015 Sheet 6 of 12Project No. 14-18.01 Designed By: KRWB - 3/2/2015 Sheet 6 of 12Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 6 of 12 ρ ρ ρ ρ ρ ρ 2 ρ Project No. 15-18.01 Designed By: KRWB - 2/24/2015 Sheet 7 of 12Project No. 14-18.01 Designed By: KRWB - 3/2/2015 Sheet 7 of 12Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 7 of 12 β β β Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 8 of 12 ρ ρ ρ ρ ρ ρ 2 ρ Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 9 of 12 β β β β β β Project No. 15-18.01 Designed By: KRWB - 2/24/2015 Sheet 10 of 12Project No. 14-18.01 Designed By: KRWB - 3/2/2015 Sheet 10 of 12Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 10 of 12 ρ ρ ρ ρ ρ ρ ρ ρ ρ ρ 2 ρ ρ ρ 2 ρ Project No. 15-18.01 Designed By: KRWB - 2/24/2015 Sheet 11 of 12Project No. 14-18.01 Designed By: KRWB - 3/2/2015 Sheet 11 of 12Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 11 of 12 SEPTIC TANK VACUUM TEST REPORT Manufacturer: _____Valley Precast Inc.______________________ Test Date: __12-12-13__________ Address _____28005 CR 317_________________________ Report By: __Derrick Eggleston____ _____P.O. Box 925_______________________ City, State Zip _____Buena Vista, CO 81211________________ TANK DESCIPTION (Attach detailed drawings) Model No: __1000T Volume and/or working capacity: _1000 Gallons__ Mfg Date: 9/23,25,26/2013____ Outside Dimensions: Length_111”__ Width _60”___ Height __68”____ Member Thickness: Top Slab__5”____ Base Slab _4”____ Walls __4”____ Compartments: __x__Dual ____Single Seam: ____Mid __x__Top If top seam; does cover slab interlock with top of wall? __x__Yes ____No Joint Sealant Brand/Size: ___Conseal CS 202, 7/8”________________ Pipe Seals Brand/Type: ___Press-Seal 402F______No. of Inlet Seals: ____1______ No. of Outlet Seals: ____1____ MIX DESIGN Mix No: __#1 bottom, #2 top________ W/C Ratio ___.340________ Fibers: _Top__No _ Bottom__Yes Brand/Type _BASF MACMatrix MacroFibers_ Dosage ____5LBS____/cy REINFORCING STEEL Rebar: ____Grade 40 _X__Grade 60 ___None Wire Fabric: ___Smooth (ASTM A185) ___Deformed (ASTM A497) _x__None CONCRETE TEST RESULTS Slump: __24”_______ %Air: ___5%_____ Temp: ___70%______ Unit Weight: __142lbs?ft3___ Compressive Strength: __Market @ 6000psi______ psi @ ___28____ Days WATERTIGHTNESS TEST Tank withheld 4” of mercury for 2 minutes without loss of vacuum: _x__Yes ___No STRUCTURAL TEST Vacuum measuring device: ____Manometer __x__Gauge: Date of last gauge calibration ___new 2013______ Tank tested to failure: ___Yes _x__No Maximum vacuum pressure tested: __10”__ inches Hg. Additional load applied to top slab ___0____ psf Tank was inspected after the load was applied and there were no signs of cracks: yes X no (describe below) __one of three tanks showed facial cracks at 9.5 to 10”, when at 10” I stopped pressure increase and left tank at 10” for 5 minutes, released pressure and cracks almost disappeared, no signs of cracking inside of tank and water check showed no leaks_____________________________________________________________________________ Sheet 5 of 5 Project No. 15-18.01 Designed By: KRWB - 2/23/2015 Sheet 10 of 10Project No. 15-18.01 Designed By: KRWB - 2/24/2015 Sheet 12 of 12Project No. 14-18.01 Designed By: KRWB - 3/2/2015 Sheet 12 of 12Project No. 15-18.01 Designed By: KRWB - 3/24/2015 Sheet 12 of 12