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HomeMy WebLinkAbout1155 Green Meadow Dr - 239128103001 March 5, 2020 Mr. Timothy Nickles timnickles@gmail.com RE: Final approval of the: Septic System Installation, OWTS-016773-2019 Property location: 1155 Green Meadow Dr, Eagle County Mr. Nickles, This letter is to inform you that the above-referenced was inspected and is finalized. This OWTS permit was approved serve a total of three (3) bedrooms. Additional information about the maintenance your septic system needs can be accessed through our website links, provided on the Environmental Health Department’s septic system resource page. Be aware that changes in the use of your property or alterations of your building may require commensurate changes to, or relocation of, your septic system. Landscape features, trees with tap roots, irrigation systems and parking areas above the soil treatment area can cause premature system failure. It is equally important that you notice and immediately repair dripping faucets and hissing toilets as this will certainly cause the system to fail. If you have any questions regarding this information, please contact us at (970) 328 -8755 and reference the OWTS septic permit number. Best Regards, Claire Lewandowski, REHS Environmental Health Specialist III Attachments: Certification Letter and Design – Septic System Flyer – Final Letter PUBLIC HEALTH & ENVIRONMENT (970) 328-8755 FAX: (970) 328-8788 environment@eaglecounty.us December 27, 2019 Project No. C1432 Tim Nickles timnickles@gmail.com Onsite Wastewater Treatment System Design 3-Bedroom Residence 1155 Green Meadow Drive Eagle County, Colorado OWTS Permit 016773-2019 Tim, ALL SERVICE septic, LLC observed the installation of the onsite wastewater treatment system (OWTS) on December 19, 2019 for the subject property. Dirt Devil Excavation installed the system. The OWTS design is based on 3-bedrooms. An average daily wastewater flow of 450 GPD was used. The 4-inch diameter 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 1000-gallon, two-compartment Valley Precast concrete septic tank with an effluent filter on the outlet tee. This filter must be cleaned annually, or as needed. Risers bring the manhole lids to grade for access. Effluent gravity flows to a distribution box, which was accessible from grade. Flow equalizers were installed to assure equal flow to each trench. The soil treatment area (STA) consists of three trenches, each with 15 ‘Quick 4’ Standard Plus Infiltrator® chambers for a total of 45 chambers and 540 square feet of infiltrative area. Trenches were separated by at least 4-feet of undisturbed soil. Inspection ports were installed at the beginning and end of each trench. Ports may be cut to grade and placed in sprinkler boxes for access. The OWTS was generally installed according to specifications. This observation is not a guarantee of workmanship and/or parts and materials. ALL SERVICE septic, LLC 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 of the expertise of the installer, soil type, and weather conditions. Please call with questions. Sincerely, ALL SERVICE septic, LLC Reviewed By: Carla Ostberg, MPH, REHS Richard H. Petz, View of clean out and septic tank Inlet tee outlet tee (handle extension will be installed) 12/30/19 Trenches View of distribution box flow equalizers were installed after this photo View of distribution box looking toward tank / D-box looking toward STA 832‐R‐13‐002 May 28, 2019 Project No. C1432 Tim Nickles timnickles@gmail.com Onsite Wastewater Treatment System Design 3-Bedroom Residence Lot 7, Sopris Mesa 1155 Green Meadow Drive Eagle County, Colorado Tim, ALL SERVICE septic, LLC completed an onsite wastewater treatment system (OWTS) design for the subject residence. The 2.567-acre property is located outside of Basalt, in an area where OWTSs are necessary. Legal Description: Subdivision: SOPRIS MESA SUBDIVISION Lot: 7 R669116 MAP 09-11-98 R669117 DEC 09-11-98 Parcel ID: 2391-281-03-001 SITE CONDITIONS The property is currently undeveloped. A 3-bedroom residence is proposed. The residence will be served potable water from a public water system. The curb stop for the property is located mid-way up the eastern property boundary that borders Green Meadow Drive. The water line must be at least 25-feet from any proposed OWTS component. The water line will enter the residence on south or southeast side of the residence. The proposed soil treatment area (STA) slopes at an approximate 15 percent slope to the east. The proposed STA is vegetated with native grasses. Table 1 describes the minimum required setback of OWTS components to physical features on the property compared to approximate, proposed setback distances. Table 1 OWTS Components and Physical Features Minimum Required Setback Approximate Proposed Setback House to Septic Tank 5’ 15’ Septic Tank to Well 50’ n/a Septic Tank to Water Course 50’ n/a STA to House 20’ 45’ STA to Well 100’ n/a STA to Water Course 50’ n/a Page 2 SUBSURFACE The subsurface was investigated by HP Geotech on March 2, 2001 by digging one soil profile test pit excavation and performing three percolation tests. The report dated March 15, 2001, Project 101-101 is enclosed. We recommend excavation of a soil profile test pit prior to construction of the STA. This office must be contacted to view the Test Pit and verify assumptions made regarding the soils based on HP Geotech’s report are accurate. After review of the report and our knowledge of soils in the area, we will be designing the STA based on Soil Type 2. A long term acceptance rate (LTAR) of 0.6 gallons per square foot will be used to design the OWTS. DESIGN SPECIFICATIONS Design Calculations: Average Design Flow = 75 GPD x 2 people/bedroom x 3 Bedrooms = 450 GPD LTAR = 0.6 GPD/SF 450 GPD / 0.6 GPD/SF x 1.0 (gravity trenches) x 0.7 (chambers) = 525 SF The new OWTS design is based on 3-bedrooms. An average daily wastewater flow of 450 GPD will be used. For the purposes of this OWTS design, Benchmark Elevation at grade 7147’ has been established as 100’ (approximate sewer line elevation exiting the residence). ALL SERVICE septic, LLC should be notified of any discrepancies or problems with grade elevations of proposed components during installation of the OWTS. OWTS Component Minimum Elevation Primary Tank Inlet Invert 97’ (min.) Distribution Box 96’ (min.) Infiltrative Surface (upper trench) 95’ (min.) A 4-inch diameter SDR-35 sewer line exiting the residence must have a double-sweep clean out and a minimum 2% grade to the septic tank. The system installation must include a 1000-gallon, two-compartment Valley Precast concrete septic tank with an effluent filter on the outlet tee. Risers must bring the manhole lids to grade for access. If more than one riser is added to the septic tank, an extension handle must be installed on the effluent filter. Effluent will gravity flow to a distribution box, which must be accessible from grade. Flow equalizers or similar product must be installed to assure equal flow to each trench. The STA will consist of three trenches, each with 15 ‘Quick 4’ Standard Plus Infiltrator® chambers for a total of 45 chambers and 540 square feet of infiltrative area. Trenches must be separated by at least 4-feet (we recommend 6-feet) of undisturbed soil. Inspection ports must be installed at the beginning and end of each trench. Ports may be cut to grade and placed in sprinkler boxes for access. The infiltrative area must be at least 2-feet below grade and must not exceed 4-feet below grade. The infiltrative area must be placed below the topsoil horizon, which was noted in the HP Geotech report at 1-foot below grade. Fill over chambers must be 3-inch minus and be able to support vegetative growth. Page 3 The component manufacturers are typical of applications used by contractors and engineers in this area. Alternatives may be considered or recommended by contacting our office. Construction must be according to Eagle County On-Site Wastewater Treatment System Regulations, the OWTS Permit provided by Eagle County Environmental Health Department, and this design. REVEGETATION REQUIREMENTS An adequate layer of good quality topsoil capable of supporting revegetation shall be placed over the entire disturbed area of the OWTS installation. A mixture of native grass seed that has good soil stabilizing characteristics (but without taproots), provides a maximum transpiration rate, and competes well with successional species. No trees or shrubs, or any vegetation requiring regular irritation shall be placed over the area. Until vegetation is reestablished, erosion and sediment control measures shall be implemented and maintained on site. The owner of the OWTS shall be responsible for maintaining proper vegetation cover. OPERATION INFORMATION AND MAINTENANCE The property owner shall be responsible for the operation and maintenance of each OWTS servicing the property. The property owner is responsible for maintaining service contracts for manufactured units, alternating STAs, and any other components needing maintenance. Geo-fabrics or plastics should not be used over the STA. No heavy equipment, machinery, or materials should be placed on the backfilled STA. Livestock should not graze on the STA. Plumbing fixtures should be checked to ensure that no additional water is being discharged to OWTS. For example, a running toilet or leaky faucet can discharge hundreds of gallons of water a day and harm a STA. If an effluent filter or screen has been installed in the OWTS, we recommend this filter or screen be cleaned annually, or as needed. If the OWTS consists of a pressurized pump system, we recommend the laterals be flushed annually, or as needed. The homeowner should pump the septic tank every two years, or as needed gauged by measurement of solids in the tank. Garbage disposal use should be minimized, and non-biodegradable materials should not be placed into the OWTS. Grease should not be placed in household drains. Loading from a water softener should not be discharged into the OWTS. No hazardous wastes should be directed into the OWTS. Mechanical room drains should not discharge into the OWTS. The OWTS is engineered for domestic waste only. ADDITIONAL CONSTRUCTION NOTES If design includes a pump, weep holes must be installed to allow pump lines to drain to minimize risk of freezing. The pump shall have an audible and visual alarm notification in the event of excessively high water conditions and shall be connected to a control breaker separate from the high water alarm breaker and from any other control system circuits. The pump system shall have a switch so the pump can be manually operated. Excavation equipment must not drive in excavation of the STA due to the potential to compact soil. Extensions should be placed on all septic tank components to allow access to them from existing grade. Backfill over the STA must be uniform and granular with no material greater than minus 3-inch. Page 4 INSTALLATION OBSERVATIONS ALL SERVICE septic, LLC must view the OWTS during construction. The OWTS observation should be performed before backfill, after placement of OWTS components. Septic tanks, distribution devices, pumps, dosing siphons, and other plumbing, as applicable, must also be observed. ALL SERVICE septic, LLC should be notified 48 hours in advance to observe the installation. LIMITS: The design is based on information submitted. If soil conditions encountered are different from conditions described in report, ALL SERVICE septic, LLC should be notified. All OWTS construction must be according to the county regulations. Requirements not specified in this report must follow applicable county regulations. The contractor should have documented and demonstrated knowledge of the requirements and regulations of the county in which they are working. Licensing of Systems Contractors may be required by county regulation. Please call with questions. Sincerely, ALL SERVICE septic, LLC Reviewed By: Carla Ostberg, MPH, REHS 5/29/19 • Has 5-10 times more flow area than other brands, so lasts many times longer between clean- ings, increasing homeowner satisfaction • Installs in min- utes inside new or existing tanks; extendible tee handle for easy removal • Easy to clean by simply hosing off whenever the tank needs pumping • Removes about two-thirds of sus- pended solids, on average, extending drainfield life • Corrosion-proof construction, to ensure long life • Lifetime warranty Residential Biotube® Effluent Filters Applications Our patented* 4-in. (100-mm) Biotube Effluent Filters, Biotube Jr., Biotube Insert Filters, and Biotube Base Inlet Filters are ideal for residential septic tanks and have a lifetime warranty. They prevent large solids from leaving the tank, dramatically improving wastewater quality and extending the life of residential drainfields. Standard Features & Benefits • Alarm available, to signal the need for cleaning • Flow modulating discharge orifices available to limit flow rate leaving tank, mitigat- ing surges and increasing retention time • Custom and commercial sizes available Effluent from the relatively clear zone of the septic tank, between the scum and sludge layers, horizontally enters the Biotube Effluent Filter. Effluent then enters the annular space between the housing and the Biotubes, utilizing the Biotubes’ entire surface for filtering. Particles larger than the Biotube’s mesh are prevented from leaving the tank. Optional Features & Benefits Biotube Filtering Process 8-in. (200-mm) Base Inlet Filter 4-in. (100-mm) Insert Filter 4-in. (100-mm) Biotube Jr. (4-in. Biotube cartridge avail- able separately as Insert Filter) Orenco’s superior effluent filters resist clogging better than all other brands. Our stan- dard, full-sized 4-in. (100-mm) Biotube Effluent Filter provides maximum long-term protection in a complete package, with housing. Our 4-in. (100-mm) Biotube Jr., at half the size of our standard model, has more filtering capacity than the full-sized filters sold by other manufacturers. For tanks with existing outlet tees, the Biotube Insert Filter is ideal. And for low-profile tanks, there’s the Base Inlet Filter. * Covered by patent numbers 5,492,635 and 4,439,323 4-in. (100-mm) Biotube Effluent Filter APS-FT-1 Rev. 3.4 © 11/10 Orenco Systems®, Inc. To Order Call your nearest Orenco Systems®, Inc. distributor. For nearest distribu- tor, call Orenco at 800-348-9843 or go to www.orenco.com and click on “Distributor Locator.” Nomenclatures Riser wall Tank wall Filter housing Extendible PVC handle Stainless steel set screws Top seal plate Air vents Biotube® filter cartridge Solid base 4-in. Biotube Effluent Filter 4-in. Biotube Jr. 4-in. Biotube Filter (standard) 4-in. Biotube Jr. (includes cartridge and housing) Distributed By: 8-in. Biotube Filter (base inlet model) 4-in. Biotube Filter Insert (cartridge only) Junior series FT J0418 Biotube effluent filter series Filter diameter (inches) Cartridge height (inches) W = fits Type 3034 outlet tee S = fits Schedule 40 outlet tee Options: Blank = no options M = flow modulation plate installed A = float bracket attached Blank = 1/8" filtration P = 1/16" filtration Insert FT i0418 Biotube effluent filter series Filter diameter (inches) Cartridge height (inches) W = fits Type 3034 outlet tee S = fits Schedule 40 outlet tee - For customized options (e.g., NC indicates North Carolina regions) - Blank = 1/8" filtration P = 1/16" filtration FT 04 Biotube effluent filter series Filter diameter (inches) Housing height: 36" and 44" are standard Options: Blank = no options M = flow modulation plate installed A = float bracket attached Cartridge height: 28" and 36" are standard - Blank = 1/8" filtration P = 1/16" filtration W = fits Type 3034 outlet pipe S = fits Schedule 40 outlet pipe FT 2208 14 B Biotube effluent filter series Housing height: 22" standard Cartridge height: 14" standard Options: A = float bracket FS = 2" outlet orifice FSO = 2" outlet orifice and overflow plate* Base inlet model - Blank = 1/8" filtration P = 1/16" filtration Filter diameter (inches) 08 = 8" * Also available with coupling and sleeve as a “kit”: FT-OVERFLOWKIT The Quick4® Plus Standard Chamber The Quick4 Plus Standard Chamber offers maximum strength through its two center structural columns. This chamber can be installed in a 36-inch-wide trench. Like the original line of Quick4 chambers, it offers advanced contouring capability with its Contour Swivel Connection™ which permits turns up to 15-degrees, right or left. It is also available in four-foot lengths to provide optimal installation flexibility. The Quick4 Plus All-in-One 12 Endcap, and the Quick4 Periscope are available with this chamber, providing increased flexibility in system configurations. Maximum Strength APPROVED in _____________________________________________ Quick4 Plus™ Series Quick4 Plus All-in-One 12 Endcap Benefits: • May be used at the end of chamber row for an inlet/outlet or can be installed mid-trench • Mid-trench connection feature allows construction of chamber rows with center feed, as an alternative to inletting at the ends of chamber rows • Center-feed connection allows for easy installation of serial distribution systems • Pipe connection options include sides, ends or top Quick4 Plus All-in-One Periscope Benefits: • Allows for raised invert installations • 180° directional inletting • 12” raised invert is ideal for serial applications Certified by the International Association of Plumbing and Mechanical Officials (IAPMO) Quick4 Plus Standard Chamber Specifications Size 34”W x 53”L x 12”H (864 mm x 1346 mm x 305 mm) Effective Length 48” (1219 mm) Louver Height 8” (203 mm) Storage Capacity 47 gal (178 L) Invert Height 0.6” (15 mm), 5.3” (135 mm), 8.0” (203 mm), 12.7” (323 mm) Quick4 Plus Standard Chamber Benefits: • Two center structural columns offer increased stability and superior strength • Advanced contouring connections • Latching mechanism allows for quick installation • Four-foot chamber lengths are easy to handle and install • Supports wheel loads of 16,000 lbs/axle with 12” of cover Contact Infiltrator Water Technologies’ Technical Services Department for assistance at 1-800-221-4436 4 Business Park Road P.O. Box 768 Old Saybrook, CT 06475 860-577-7000 • Fax 860-577-7001 1-800-221-4436 www.infiltratorwater.com U.S. Patents: 4,759,661; 5,017,041; 5,156,488; 5,336,017; 5,401,116; 5,401,459; 5,511,903; 5,716,163; 5,588,778; 5,839,844 Canadian Patents: 1,329,959; 2,004,564 Other patents pending. Infiltrator, Equalizer, Quick4, and SideWinder are registered trademarks of Infiltrator Water Technologies. Infiltrator is a registered trademark in France. Infiltrator Water Technologies is a registered trademark in Mexico. Contour, MicroLeaching, PolyTuff, ChamberSpacer, MultiPort, PosiLock, QuickCut, QuickPlay, SnapLock and StraightLock are trademarks of Infiltrator Water Technologies. PolyLok is a trademark of PolyLok, Inc. TUF-TITE is a registered trademark of TUF-TITE, INC. Ultra-Rib is a trademark of IPEX Inc. © 2013 Infiltrator Water Technologies, LLC. All rights reserved. Printed in U.S.A.PLUS05 0713 Quick4 Plus™ Series INFILTRATOR WATER TECHNOLOGIES STANDARD LIMITED WARRANTY (a) The structural integrity of each chamber, endcap and other accessory manufactured by Infiltrator (“Units”), when installed and operated in a leachfield of an onsite septic system in accordance with Infiltrator’s instructions, is warranted to the original purchaser (“Holder”) against defective materials and workmanship for one year from the date that the septic permit is issued for the septic system containing the Units; provided, however, that if a septic permit is not required by applicable law, the warranty period will begin upon the date that installation of the septic system commences. To exercise its warranty rights, Holder must notify Infiltrator in writing at its Corporate Headquarters in Old Saybrook, Connecticut within fifteen (15) days of the alleged defect. Infiltrator will supply replacement Units for Units determined by Infiltrator to be covered by this Limited Warranty. Infiltrator’s liability specifically excludes the cost of removal and/or installation of the Units. (b) THE LIMITED WARRANTY AND REMEDIES IN SUBPARAGRAPH (a) ARE EXCLUSIVE. THERE ARE NO OTHER WARRANTIES WITH RESPECT TO THE UNITS, INCLUDING NO IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE (c) This Limited Warranty shall be void if any part of the chamber system is manufactured by anyone other than Infiltrator. The Limited Warranty does not extend to incidental, consequential, special or indirect damages. Infiltrator shall not be liable for penalties or liquidated damages, including loss of production and profits, labor and materials, overhead costs, or other losses or expenses incurred by the Holder or any third party. Specifically excluded from Limited Warranty coverage are damage to the Units due to ordinary wear and tear, alteration, accident, misuse, abuse or neglect of the Units; the Units being subjected to vehicle traffic or other conditions which are not permitted by the installation instructions; failure to maintain the minimum ground covers set forth in the installation instructions; the placement of improper materials into the system containing the Units; failure of the Units or the septic system due to improper siting or improper sizing, excessive water usage, improper grease disposal, or improper operation; or any other event not caused by Infiltrator. This Limited Warranty shall be void if the Holder fails to comply with all of the terms set forth in this Limited Warranty. Further, in no event shall Infiltrator be responsible for any loss or damage to the Holder, the Units, or any third party resulting from installation or shipment, or from any product liability claims of Holder or any third party. For this Limited Warranty to apply, the Units must be installed in accordance with all site conditions required by state and local codes; all other applicable laws; and Infiltrator’s installation instructions. (d) No representative of Infiltrator has the authority to change or extend this Limited Warranty. No warranty applies to any party other than the original Holder. The above represents the Standard Limited Warranty offered by Infiltrator. A limited number of states and counties have different warranty requirements. Any purchaser of Units should contact Infiltrator’s Corporate Headquarters in Old Saybrook, Connecticut, prior to such purchase, to obtain a copy of the applicable warranty, and should carefully read that warranty prior to the purchase of Units. Quick4 Plus Standard Chamber ___________________________________________________________________________________ Quick4 Plus All-in-One 12 Endcap ________________________________________________________________________________ Quick4 Plus All-in-One Periscope ________________________ EFFECTIVE LENGTH48" 12" 34" QUICK4 PLUS ALL-IN-ONE PERISCOPE (360° SWIVEL) 12.7" INVERT PRESSURIZED PIPE DRILL POINTS LOCATIONS (2 PLACES) 33" 18" 8" INVERT 13" EFFECTIVE LENGTH48" 12" 34" QUICK4 PLUS ALL-IN-ONE PERISCOPE (360° SWIVEL) 12.7" INVERT PRESSURIZED PIPE DRILL POINTS LOCATIONS (2 PLACES) 33" 18" 8" INVERT 13" FRONT VIEW SIDE VIEW EFFECTIVE LENGTH48" 12" 34" QUICK4 PLUS ALL-IN-ONE PERISCOPE (360° SWIVEL) 12.7" INVERT PRESSURIZED PIPE DRILL POINTS LOCATIONS (2 PLACES) 33" 18" 8" INVERT 13" 6" 5"9" July 22, 2019 Project No. C1432 Tim Nickles timnickles@gmail.com Subsurface Analysis Explanation Lot 7, Sopris Mesa 1155 Green Meadow Drive Eagle County, Colorado Tim, ALL SERVICE septic, LLC received a request from Eagle County Environmental Health Department for further explanation of the soils for the subject property. Legal Description: Subdivision: SOPRIS MESA SUBDIVISION Lot: 7 R669116 MAP 09-11-98 R669117 DEC 09-11-98 Parcel ID: 2391-281-03-001 SUBSURFACE The subsurface was investigated by HP Geotech on March 2, 2001 by digging one soil profile test pit excavation and performing three percolation tests. The report dated March 15, 2001, Project 101-101 is enclosed. We recommend excavation of two soil profile test pits prior to construction of the soil treatment area (STA). This office must be contacted to view the Test Pits and verify assumptions made regarding the soils based on HP Geotech’s report are accurate. The soils in the Missouri Heights area are typically clay loam topsoil underlain by what we have been describing as “caliche” but is better described as calcareous sandy silt. The material grades out with finer particles similar to clay; however, accepts water. According to Dan Hardin with Kumar and Associates (formerly HP Geotech), he explains why the percolation rate does not correlate to what we would typically find in clay soils. “…The liquid limit is the water content where the clay starts to act like a liquid. And the plastic limit is the water content where the clay starts to act like a plastic. The Plasticity Index is the difference between the plastic limit and the liquid limit. The more plastic the clay is, typically the permeability decreases. Silt particles are very fine sand and their behavior is controlled mostly by gravity like sands and gravels. Clay particles are smaller, as you know, and are plate-like. Their behavior is controlled by electrical charges, ions, etc. Water is a weak dipole H2O with a slight positive charge on one side and slight negative charge on the other. The greater the charge on the clay particle, the Page 2 more water it will attract. This water will stay with the particle and will not pass through the soil easily. This is why gradation is only part of what makes soils more or less permeable. The “activity” or electrical charge of the particles impacts the flow of water also.” Or current regulation only classifies soils based on gradation and the corresponding percolation rate. In the Missouri Heights area and specifically on the subject property, the material grades out as a sandy clay, but has a percolation rate of 20-26 minutes per inch (MPI). After review of the report and our knowledge of soils in the area, we support the STA design based on Soil Type 2. A long term acceptance rate (LTAR) of 0.6 gallons per square foot has been used to design the OWTS. Please call with questions. Sincerely, ALL SERVICE septic, LLC Reviewed By: Carla Ostberg, MPH, REHS 7/23/19 7/15/2019 Eagle County Government Mail - 1155 Green Meadow Drive Soils Test - https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&sear… https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permthid=thread-a%3Ar5082433160197631180&simpl=msg-a%3Ar609571185…1/1 Claire Lewandowski <claire.lewandowski@eaglecounty.us> 1155 Green Meadow Drive Soils Test 1 message Claire Lewandowski <claire.lewandowski@eaglecounty.us>Mon, Jul 15, 2019 at 12:43 PM To: Carla Ostberg <carla.ostberg@gmail.com>, Richard Petz <patrich2us@yahoo.com> Cc: environment@eaglecounty.us, timnickles@gmail.com Hi Carla, I'm conducting this review. Curious about the soils test from HP Kumar and your conclusion. The tests first say that they are only done for foundation only, and so I am not sure if they are taking into account percentage rock. Also all tests conclude that the soils are a Sandy Clay, so to me that would be a type 4 or 4A (depending on rock content) but you use .6 LTAR for a Sandy Loam. Can you tell me how you came to that conclusion? Additionally, the HP Kumar tests anticipate the OWTS to the Wets of the property and I believe conduct the test to the Northeast, which is not marked on the design site plan. The report also states that the tests were conducted in 3 feet of snow. In this case, especially due to the fact that this design assumes optimal conditions, that two soils test pits must be performed in accordance with ECPHE OWTS Regulations, and submitted with the design before we can issue the permit. Please let me know if you have any questions or concerns. Thank you! -- Please note that beginning July 15 the Community Development Department will have new walk-in hours. The office welcomes walk-in customers between 8 a.m. and 4 p.m. Monday through Friday, except holidays. Claire Lewandowski, REHS Environmental Health Specialist III 970-328-8755 (office) 970-328-8747 (direct) environment@eaglecounty.us www.eaglecounty.us 7/22/2019 Eagle County Government Mail - clay - https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A16… https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A1639498049024079694&simpl=msg-f%3A16394980490…1/2 Claire Lewandowski <claire.lewandowski@eaglecounty.us> clay Carla Ostberg <carla.ostberg@gmail.com>Fri, Jul 19, 2019 at 8:39 AM To: Claire Lewandowski <claire.lewandowski@eaglecounty.us> OK, I've been having a conversation with Dan Hardin with HP (Kumar and Assoc). He's saying the material is not really "caliche", which is what I've been calling it. He says it's really clay, but due to the plasticity and electrical charge, it doesn't hold water. It's still clay because of the particle size alone and that really doesn't fit into our neat little chart in the regulation. I'm still trying to work this out with him to see how I should be describing it. The soil in Missouri Heights ACTS more like a loam (Soil Type 2 or 2A) when you add water, but the particle size does not give with that soil type. I'll keep you posted with what I learn and try to adapt my designs accordingly. I think the DESIGNS are correct, but maybe the way I'm describing them is not. Probably because I'm not a geologist and our simplified table doesn't fit this type of soil properly. Happy Friday! _____________________ Soil Not sure what you mean by “normal” clay. I define clay as having a -200 fines content of greater than 50% and a plasticity index of over 7 and a liquid limit over about 20. The liquid limit is the water content where the clay starts to act like a liquid. And the plastic limit is the water content where the clay starts to act like a plastic. The Plasticity Index is the difference between the plastic limit and the liquid limit. The more plastic the clay is, typically the permeability decreases. Silt particles are very fine sand and their behavior is controlled mostly by gravity like sands and gravels. Clay particles are smaller, as you know, and are plate-like. Their behavior is controlled by electrical charges, ions, etc. Water is a weak dipole H2O with a slight positive charge on one side and slight negative charge on the other. The greater the charge on the clay particle, the more water it will attract. This water will stay with the particle and will not pass through the soil easily. This is why gradation is only part of what makes soils more or less permeable. The “activity” or electrical charge of the particles impacts the flow of water also. Carla Ostberg cell) 970-309-5259 CBO Inc. working with ALL SERVICE septic Office: 981 Cowen Drive, B-7 Carbondale, CO 81623 Mailing: 7/22/2019 Eagle County Government Mail - clay - https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A16… https://mail.google.com/mail/u/0?ik=da50768ddd&view=pt&search=all&permmsgid=msg-f%3A1639498049024079694&simpl=msg-f%3A16394980490…2/2 33 Four Wheel Drive Road Carbondale, CO 81623 July 22, 2019 Project No. C1432 Tim Nickles timnickles@gmail.com Subsurface Analysis Explanation Lot 7, Sopris Mesa 1155 Green Meadow Drive Eagle County, Colorado Tim, ALL SERVICE septic, LLC received a request from Eagle County Environmental Health Department for further explanation of the soils for the subject property. Legal Description: Subdivision: SOPRIS MESA SUBDIVISION Lot: 7 R669116 MAP 09-11-98 R669117 DEC 09-11-98 Parcel ID: 2391-281-03-001 SUBSURFACE The subsurface was investigated by HP Geotech on March 2, 2001 by digging one soil profile test pit excavation and performing three percolation tests. The report dated March 15, 2001, Project 101-101 is enclosed. We recommend excavation of two soil profile test pits prior to construction of the soil treatment area (STA). This office must be contacted to view the Test Pits and verify assumptions made regarding the soils based on HP Geotech’s report are accurate. The soils in the Missouri Heights area are typically clay loam topsoil underlain by what we have been describing as “caliche” but is better described as calcareous sandy silt. The material grades out with finer particles similar to clay; however, accepts water. According to Dan Hardin with Kumar and Associates (formerly HP Geotech), he explains why the percolation rate does not correlate to what we would typically find in clay soils. “…The liquid limit is the water content where the clay starts to act like a liquid. And the plastic limit is the water content where the clay starts to act like a plastic. The Plasticity Index is the difference between the plastic limit and the liquid limit. The more plastic the clay is, typically the permeability decreases. Silt particles are very fine sand and their behavior is controlled mostly by gravity like sands and gravels. Clay particles are smaller, as you know, and are plate-like. Their behavior is controlled by electrical charges, ions, etc. Water is a weak dipole H2O with a slight positive charge on one side and slight negative charge on the other. The greater the charge on the clay particle, the Page 2 more water it will attract. This water will stay with the particle and will not pass through the soil easily. This is why gradation is only part of what makes soils more or less permeable. The “activity” or electrical charge of the particles impacts the flow of water also.” Or current regulation only classifies soils based on gradation and the corresponding percolation rate. In the Missouri Heights area and specifically on the subject property, the material grades out as a sandy clay, but has a percolation rate of 20-26 minutes per inch (MPI). After review of the report and our knowledge of soils in the area, we support the STA design based on Soil Type 2. A long term acceptance rate (LTAR) of 0.6 gallons per square foot has been used to design the OWTS. Please call with questions. Sincerely, ALL SERVICE septic, LLC Reviewed By: Carla Ostberg, MPH, REHS 7/23/19 September 7, 2019 Project No. C1432 Tim Nickles timnickles@gmail.com Subsurface Analysis Lot 7, Sopris Mesa 1155 Green Meadow Drive Eagle County, Colorado Tim, ALL SERVICE septic, LLC completed a subsurface analysis, pursuant to the condition listed on Eagle County Onsite Wastewater Treatment System (OWTS) Permit OWTS-016773-2019. The 2.567-acre property is located outside of Basalt, in an area where OWTSs are necessary. Legal Description: Subdivision: SOPRIS MESA SUBDIVISION Lot: 7 R669116 MAP 09-11-98 R669117 DEC 09-11-98 Parcel ID: 2391-281-03-001 SUBSURFACE The subsurface was investigated on September 3, 2019 by digging two soil profile test pit excavations (Test Pits). A visual and tactile soil analysis was completed by Carla Ostberg at the time of excavation.1 The purpose of this exploration was to verify the depth of the ‘caliche’ horizon. We use the term ‘caliche’ but is better described as calcareous sandy silt. The material grades out with finer particles similar to clay; however, accepts water. The materials encountered in the Test Pit #1 consisted of dark brown, clay loam topsoil to 1-foot, underlain by tan caliche to a maximum depth explored of 8.0-feet. No bedrock or groundwater was encountered. The materials encountered in Test Pit #2 were similar to those encountered in Test Pit #1 with the exception of larger, blocky, firm peds near the bottom of the test pit. The test pit was excavated to a maximum depth explored of 8.0-feet. No bedrock or groundwater was encountered. A sample was taken from approximately 3-feet below grade in Test Pit #1. The sieved sample formed a ball and a ribbon less than 1-inch in length before breaking. Soil structure shape was loose to blocky, structure grade was moderate, consistency was loose to friable, and texture was more smooth than gritty. STA sizing is based on Soil Type 2. A long term acceptance rate (LTAR) of 0.6 gallons per square foot will be used to design the OWTS. 1 Carla Ostberg holds a Certificate of Attendance and Examination from the CPOW Visual and Tactile Evaluation of Soils Training. Page 2 Please call with questions. Sincerely, ALL SERVICE septic, LLC Reviewed By: Carla Ostberg, MPH, REHS September 3, 2019 Foundation for house Test Pit #1 Sidewall moderate structure grade 9/10/19 Page 3 backfill Sieved sample Looking toward Test Pit #2 Page 4 Test Pit #2 (note no large Basalt boulders encountered in ‘caliche’ horizon Minimal topsoil (approx. 1-foot or less) September 7, 2019 Project No. C1432 Tim Nickles timnickles@gmail.com Subsurface Analysis Lot 7, Sopris Mesa 1155 Green Meadow Drive Eagle County, Colorado Tim, ALL SERVICE septic, LLC completed a subsurface analysis, pursuant to the condition listed on Eagle County Onsite Wastewater Treatment System (OWTS) Permit OWTS-016773-2019. The 2.567-acre property is located outside of Basalt, in an area where OWTSs are necessary. Legal Description: Subdivision: SOPRIS MESA SUBDIVISION Lot: 7 R669116 MAP 09-11-98 R669117 DEC 09-11-98 Parcel ID: 2391-281-03-001 SUBSURFACE The subsurface was investigated on September 3, 2019 by digging two soil profile test pit excavations (Test Pits). A visual and tactile soil analysis was completed by Carla Ostberg at the time of excavation.1 The purpose of this exploration was to verify the depth of the ‘caliche’ horizon. We use the term ‘caliche’ but is better described as calcareous sandy silt. The material grades out with finer particles similar to clay; however, accepts water. The materials encountered in the Test Pit #1 consisted of dark brown, clay loam topsoil to 1-foot, underlain by tan caliche to a maximum depth explored of 8.0-feet. No bedrock or groundwater was encountered. The materials encountered in Test Pit #2 were similar to those encountered in Test Pit #1 with the exception of larger, blocky, firm peds near the bottom of the test pit. The test pit was excavated to a maximum depth explored of 8.0-feet. No bedrock or groundwater was encountered. A sample was taken from approximately 3-feet below grade in Test Pit #1. The sieved sample formed a ball and a ribbon less than 1-inch in length before breaking. Soil structure shape was loose to blocky, structure grade was moderate, consistency was loose to friable, and texture was more smooth than gritty. STA sizing is based on Soil Type 2. A long term acceptance rate (LTAR) of 0.6 gallons per square foot will be used to design the OWTS. 1 Carla Ostberg holds a Certificate of Attendance and Examination from the CPOW Visual and Tactile Evaluation of Soils Training. Page 2 Please call with questions. Sincerely, ALL SERVICE septic, LLC Reviewed By: Carla Ostberg, MPH, REHS September 3, 2019 Foundation for house Test Pit #1 Sidewall moderate structure grade 9/10/19 Page 3 backfill Sieved sample Looking toward Test Pit #2 Page 4 Test Pit #2 (note no large Basalt boulders encountered in ‘caliche’ horizon Minimal topsoil (approx. 1-foot or less) July 22, 2019 Project No. C1432 Tim Nickles timnickles@gmail.com Subsurface Analysis Explanation Lot 7, Sopris Mesa 1155 Green Meadow Drive Eagle County, Colorado Tim, ALL SERVICE septic, LLC received a request from Eagle County Environmental Health Department for further explanation of the soils for the subject property. Legal Description: Subdivision: SOPRIS MESA SUBDIVISION Lot: 7 R669116 MAP 09-11-98 R669117 DEC 09-11-98 Parcel ID: 2391-281-03-001 SUBSURFACE The subsurface was investigated by HP Geotech on March 2, 2001 by digging one soil profile test pit excavation and performing three percolation tests. The report dated March 15, 2001, Project 101-101 is enclosed. We recommend excavation of two soil profile test pits prior to construction of the soil treatment area (STA). This office must be contacted to view the Test Pits and verify assumptions made regarding the soils based on HP Geotech’s report are accurate. The soils in the Missouri Heights area are typically clay loam topsoil underlain by what we have been describing as “caliche” but is better described as calcareous sandy silt. The material grades out with finer particles similar to clay; however, accepts water. According to Dan Hardin with Kumar and Associates (formerly HP Geotech), he explains why the percolation rate does not correlate to what we would typically find in clay soils. “…The liquid limit is the water content where the clay starts to act like a liquid. And the plastic limit is the water content where the clay starts to act like a plastic. The Plasticity Index is the difference between the plastic limit and the liquid limit. The more plastic the clay is, typically the permeability decreases. Silt particles are very fine sand and their behavior is controlled mostly by gravity like sands and gravels. Clay particles are smaller, as you know, and are plate-like. Their behavior is controlled by electrical charges, ions, etc. Water is a weak dipole H2O with a slight positive charge on one side and slight negative charge on the other. The greater the charge on the clay particle, the Page 2 more water it will attract. This water will stay with the particle and will not pass through the soil easily. This is why gradation is only part of what makes soils more or less permeable. The “activity” or electrical charge of the particles impacts the flow of water also.” Or current regulation only classifies soils based on gradation and the corresponding percolation rate. In the Missouri Heights area and specifically on the subject property, the material grades out as a sandy clay, but has a percolation rate of 20-26 minutes per inch (MPI). After review of the report and our knowledge of soils in the area, we support the STA design based on Soil Type 2. A long term acceptance rate (LTAR) of 0.6 gallons per square foot has been used to design the OWTS. Please call with questions. Sincerely, ALL SERVICE septic, LLC Reviewed By: Carla Ostberg, MPH, REHS 7/23/19