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HomeMy WebLinkAboutpitkin.eh.272904300012 (1994)Parc # oy3-0'0- Ll/x + ASPEN/P� i rdN ENVIRONMENTAL HEALTH DEPARTMtNT APPLICATION FOR AN INDIVIDUAL SEWAGE DISPOSAL SYSTEM OSDS) PERMIT Name of OWNER fD. GY ��yl a Gtr _ Bus. Phone # q/e Mailing Address Home Phone # « Name of AGENT Bus. Phone # Mailing Address - Home Phone #. 1 Copy of Permit to be Sent to: " ERMIT IS FOR: "N INSTALLATION, () REPAIR, () ALTERATION NOT DUE TO FAILURE, or () EMERGENCY USE. for permit # >TREET ADDRESS of Property: Do f aI s i^�" )O"d s I b- At Z10-3 -3 _EGAL DESCRIPTION of Property: pe- � lot _, block , filing _, and subdiv. ize of Lot J acres Type of Structure Proposed -- BEDROOMS, #LOFTS _, #GARBAGE DISPOSALS # ISHWASHER -; # CLOTHES SHERS eater Supply: (441ivate Well, O Spring, O Stream, or O System (Public or Private Name: _ } s PROOF OF ADEQUATE WATER ATTACHED? K -YES or O NO HAS THIS PROJECT BEEN APPROVED BY PITKIN COUNTY? YES or O NO Application, for an individual sewage disposal system permit is hereby submitted. The undersigned acknowledges that the above Information is true and that false information will invalidate the application and v subsequent permit Issuance of the permit does not explicitly or implicitly Imply the approval of any other permit required for construction pursuant to Pitkin County codes. No construction may be undertaken a all approvals and permits have been obtained. The owner assumes all responsibilities In case of failure or inadequacy of this system. ,in"IGNATURE OF APPLICANT Date (� _ he application becomes invalid 120 days from the date qgned. This Permit is valid only for the design as specified bel . ******************************BELOW FOR OFFICE USE INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT #11010 t50 fee paid /)Yes. Date received r1-/ f -- 11 Receipt # I _7 7 Received By )V_ j� �N 7SIGN CRITERIA OF SYSTEM TO BE INSTALLED: Any changes must be submitted and apprgved in yvriting. inMp/ �S�e �+7T4Ghcd 50 6 TcsTdca7ed iz/i 2.1 of Bedrooms: , Percolation Rate:' mpi, Average Daily Waste Flow: &CC) gallons. an Engineer Designed system needed? () Yes orNo (All plans and specifications of the engineer shall be followed. Any changes must be approved in writing and the engineer .all certify the final installation to the Environmental Health Departme in writing.) iinimum Septic Tank Capacity 1 ;f' 50 gallons Absorption Area�square feet minimum Absorption Bed, Absorption Field in Trenches, () Gravel -less system, Xpumping/Dosing Chamber, () Absorption Pit 2 0. MA-1IMu01 b-0`0 26Du11-zrvN IS A,1-OWe6 Foto k A;6- phi tN! -rdtEti N 5 , W,Hte-H wiatF—'o -9 ..Q,�inea.,t� d'L T.atNf-r 330 .4t -pr -( (tto •, �i -• stages requiring inspection: () Before excavation, () Upon completion and prior to placement of gravel,Before covering distribution system of absorption Meld, Prior to backfill of any component and any situation deemed necessary by Environmental Hea Department Staff. ot.lvt� Aa s mhos C y'�-* vel-G,_ss 77'*'VeG' Lead S V 5Tair2. .ans and specifications of the proposed individual sewage disposal system have been reviewed and are considered satisfactory. Permission Is hereby granted to the owner or his agent to perform the work •dicated above in accordance with the Pitkin County Individual Sewa a Di Regulations in effect on the date of issue. In additan to general provisions set forth In any attachments, this Permit is subject -o the following additional terms and conditions if any: / z1i//*y APPROVED FOR ISSUE BY: DATE OF ISSUE: 3_941 y __ ne above individual sewage disposal system has been inse r use by the Aspen Pitkin En f nmental Health Department The owner assumes all responsibilities in case of failure or inadequacy of this ,jstem. Complete as -built drawing and all specifications of as- are included with this permi FINAL INSPECTION DATE OF FINAL INSPECTION: �Ile lt>% :BOTH:UDD:JTCPC:WP:PERMIT 130 SOUTH GALENA STREET ASPEN, COLORADO 81511 • PHONE 303.920.5070 • FAX 303.920.5197 6.PEHD 1/94 PRINTED ON RECYCLED PAPER —i/ops 4� ::�, 4e, P7.0use, FGy ear yio ASPE4PTWlN ENVIRONMENTAL HEALTH DEPA RENT 01 FINAL SYSTEM DESIGN FINAL SPECIFICS OF THE SYSTEM INCLUDED UNDER THIS PERMIT: (As -Built Conditions) Type of Tank or Treatment Unit: C.G f!/G'/2'Tt Tank Capacity: {'2 gallons Type of Absorption Field:Absorption Area: a(� ` 4 square feet 77-1&1V,'17 e- .S DESCRIPTION, CONDITIONS, AND SPECIFICATIONS OF SYSTEM DESIGN: FINAL AS -BUILT PLOT PLAN: lul? G'alw9e 41V �Y.✓ca2'�`N V �6. . G77"��/�r� FINAL INSPECTION BY: DATE OF INSPECTION: 130 SOUTH GALENA STREET ASPEN, COLORADO 61611 • PHONE 303.920.5070 • FAX 303.920.5197 PRINTED ON RECYCLED PAPER • .P.. Commonwealth© Land Title Insurance Company EXHIBIT A .+W A Tract of land situated in the SE1/4 SW1/4 of Section 4, Township 10 South, Range 88 West of the 6th P.M., lying Easterly of the Easterly right-of-way line of the Old Crystal River Railroad right-of-way, Westerly of the Easterly line of said SE1/4 SW1/4 and Northerly of the Southerly line of said SEI/4 SW1/4, said tract being described as follows: Beginning at a point on the Southerly line of said SE1/4 SW1/4, said point being on the Easterly right-of-way line of said railroad, whence an iron post with a brass cap found in place and properly marked for the Witness Corner of the Southwest corner of said Section 4, bears West 1745.75 feet, thence North 25°14'00" East 196.51 feet along the Easterly right-of-way line of said railroad, thence North 35°44'30" East 189.97 feet along the Easterly right-of-way line of said railroad, thence North 37023'00" East 156.49 feet along the Easterly right-of-way line of said railroad, thence North 31°26'30" East 120.54 feet along the Easterly right-of-way line of said railroad, thence North 21059'00" East 142.95 feet along the Easterly right-of-way line of said railroad, thence North 06023'00" East 191.39 feet along the Easterly right-of-way line of said railroad, thence East 71.63 feet more or less, to a point on the Easterly line of said SE1/4 SW1/4, thence South 00005'00" West along the Easterly line of said SE1/4 SW1/4 881.90 feet more or less, to the Southeast Corner of said SE1/4 SW1/4, thence West 497.77 feet along the Southerly line of said SE1/4 SW1/4 to a point on the Easterly right-of-way line of said railroad, to the point of beginning. Together with the right to ingress and egress from Colorado State Highway No. 133. Said right of ingress and egress is hereby limited from said Highway to the Southwest corner of the described tract of land. COUNTY OF PITKIN, STATE OF COLORADO. 0 Nelson Environmental & Wastewater Solutions Ltd'. • E W July 21, 1993 S' Mr. and Mrs. Robert Durham c/o Filoha Meadows 14628 Highway 133 Carbondale, CO 81623 Subject: Soils Evaluation and Percolation Test for Individual Sewage System Design for a Parcel of Land in Section 4, Township 10 South, Range 88 West of the 6th P.M. Dear Melody and Bob, As requested, Nelson Environmental and Wastewater Solutions, Ltd., performed a soils study and percolation testing to design a septic system for the proposed residence. We conducted this study according to Section 4-5 of Pitkin County Regulations Individual Sewage Disposal Systems on Monday, July 12, 1993. We have based our recommendations on the subsurface conditions encountered. Please furnish this letter to the Aspen/Pitkin Environmental Health Department at your earliest convenience in order to obtain a permit to construct this individual sewage system. Proposed Construction: The planned residence is a three bedroom, two and one-half bathroom house. There is an attached office and a future caretaker unit proposed as well. The property is to be served by an individual well. The lot is approximately 2 acres in size. Site Conditions: The site is a lot in the Crystal River Valley to the East of the highway, river, and old railroad grade. The building site is approximately 100 feet above and 300 feet from the Crystal River. The ground surface, which appears natural in the proposed area of the absorption field, slopes gently to the West at a 5% grade. It is an open meadow with several clumps of cottonwood and aspen trees. Subsurface Conditions: A soil profile pit, within 10 feet of the proposed absorption area, was excavated while we were there on June 22, 1993. The excavation revealed that no groundwater or bedrock was present within eight and one-half feet of the surface of the ground. In general, the subsoil consisted of a reddish silty loam with numerous small bolcky cobbles and flagstone fragments, three inches to three feet in diameter. P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 Home (303) 923.2766 e Proposed Durham Residence Soils Evaluation and Percolation Test for Individual Sewage System Design or July 21, 1993 Page 2 The subsurface soil conditions were evaluated with the standard Percolation test procedures at the approximate location shown on Figure 1. The test holes were excavated with a backhoe to a depth of two to three feet and completed by hand. Preparatory to the test, the sidewalls were scrapped, and three inches of gravel was placed in each test hole. Percolation Testing: Percolation testing was performed in the proposed absorption trench area North of the residence. This testing was performed in three of the shallow holes excavated to a depth of between thirty-two and thirty-eight inches. The percolation holes were pre-soaked by adding water approximately every two hours for an eight hour period before beginning the percolation test. The results of the percolation testing are presented in Table I. These results indicate the silty loam soils have an average percolation rate of 50 minutes per inch, a satisfactory percolation rate under Pitkin County criteria. This rate may have been slowed by the numerous rock fragments present in the sidewall of each of the test hole. The same circumstances explain the variability of the percolation rate between the test holes. Limitations: This report has been prepared in accordance with generally accepted practices in this area for use for sewage disposal design purposes. The conclusions and recommendations submitted in this report are based upon data obtained from our site visits at the location indicated. There is some possibility that the nature and extent of variations in the subsurface soils across the site may not have been evident at the time of this investigation, and may require additional evaluation if further excavation reveals conditions different from those described. This office should be advised of these situations as soon as possible so reevaluation of our recommendations can be done. If you have questions or if we may be of further assistance, please call the office. Sincerely, Robert F. Nelson, REHS President Attachments *1 P-2. FIGURE I Durham Residence 15200 ? Highway 133 C. B n�) fix' �i '(N2 U 4.1f 0 vf Po ee- tv Oorrom) P-41 p s, 14 VIFfivrl") Aj �1, _ r �� if �� 06r) J&,LA*AT> '10 e9vS-,AL-P'lFvf*? T. 0 v <,e Tf' WAMOW A Nelson Environmental & Wastewater Solutions Ltd: E W S TABLE I PERCOLATION TEST RESULT FORM Durham Property Date of Percolation Test: 7/12/93 P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 Home (303) 923.2766 Length Depth at Depth at Average Hole Hole of Interval Start of End of Percolation No. Depth(in.) (Minutes) (Inches) (Inches) Rate(Min./Inch) 1 34 10 2 1/8 1 5/8 (refill) 15 2 9/16 1 7/8 (refill) 10 2 11/16 2 1/4 (refill) 10 2 1/4 1 3/4 20 2 32 13 3 1/2 3 (refill) 15 5 3/16 4 7/8 (refill) 12 5 3/4 5 5/8 (refill) 10 5 5/8 5 1/2 80 3 38 12 4 13/16 4 9/16 10 4 9/16 4 3/8 13 4 3/8 4 3/16 (refill) 10 4 13/16 4 11/16 (refill) 10 5 1/16 4 7/8 10 4 7/8 4 11/16 53 Durham Property Date of Percolation Test: 7/12/93 P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 Home (303) 923.2766 cm Nelson Environmental & Wastewater Solutions Ltd E July 21, 1993 W Mr. and Mrs. Robert Durham S c/o Filoha Meadows 14628 Highway 133 Carbondale, CO 81623 Subject: Individual Sewage System Design for a Parcel of Land in Section 4, Township 10 South, Range 88 West of the 6th P.M. Dear Melody and Bob, As requested, Nelson Environmental and Wastewater Solutions, Ltd., has performed a soils study and percolation testing for the design and construction of a septic system for the proposed residence at the subject site. This letter details our design recommendations. Proposed Construction and Building Site: The proposed residence is to be a three-bedroom, two and one half bathroom house. There is an attached office and a possible future caretaker unit proposed on the property as well. The residence is to be supplied water from a drilled well on the property. The lot does not present any significant limitations to the construction of an on-site sewage disposal system. The ground surface, which appears natural in the proposed area of the replacement absorption field, slopes rather gently to the West at a 5% grade. There are no natural drainages or irrigation ditches apparent in the area. Minimum Pitkin County Requirements: The percolation rates measured in the silty loam subsoils were measured at an average of 50 minutes per inch. The minimum Pitkin County requirements for this installation are based on a system flow of 450 gallons per day. This flow would require a septic tank of 1000 gallons minimum volume, and a minimum of 2220 square feet of standard absorption trench, and does not include an increased capacity for the caretaker unit. Under the Pitkin County regulations, a standard trench configuration is defined as follows: A standard absorption trench is an excavation less than three -feet (3') wide and containing a single 4 -inch (4") perforated distribution pipe in the center. A minimum of six -inches (6") of 1/2 inch to 2 1/2 inch diameter gravel is placed under the distribution pipe. A sufficient amount of additional gravel is placed around and over the distribution pipe and to bed and cover the pipe with a minimum of two inches (2") of gravel. A minimum of two trenches is required by code for any septic field trench installation. P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 Home (303) 923.2766 Bob and Melody Durham Individual Sewage System Design July 21, 1993 Recommended On-site Wastewater Disposal Design: You have indicated a preference for the use of a separate gray water system for the laundry and for the installation of toilet fixtures flushing with only 1.6 gallons. A 25% reduction in leach field size is permitted for the use of low water use toilets, flushing on 1.6 gallons or less. Displacing the wastewater from the laundry into a separate gray water system reduces the primary septic field size an additional 26%. Further, we would recommend the dosing siphon to be incorporated into the system between the tank and the absorption field. This unit will provide a more even distribution of the effluent flow to the trenches, and permit an intermittent loading and resting cycle within the system. An additional 20% reduction in absorption trench area is permitted for a dosed system. It is advisable to use a large distribution box to equalize the flow to each of the four trenches, and yet accommodate the surge of water discharged from the dosing siphon. The distribution box is placed between the dosing siphon and the leaching chamber trenches and connected to each with a piece of solid PVC pipe. The suggested design incorporates the three alternatives listed above. The suggested systems, therefore, would consist of a blackwater system and separate gray water system for the laundry. The blackwater system primary treatment tank should be increased in volume to a 1250 gallon septic tank, in order to accommodate and provide sufficient detention time for any increase in flow from the possible caretaker unit. The absorption field for the blackwater system for the planned three-bedroom house would require 912 square feet of trench bottom area with all of the area reductions incorporated into the design. The system could then consist of four trenches, each 76 feet long. It is advisable to excavate these trenches as shallow as possible, to a depth of no more than three feet. An additional 100 foot trench could be added to the leach field at a later date, when the caretaker unit is constructed. The gray water system recommended for the laundry would consist of a 1000 gallon septic tank and 255 square feet of absorption trench. Two standard trenches, three feet wide and 43 feet long, would provide the required area for this portion of the wastewater system. Although located in a gently sloping area, we advise that the trench excavations be placed on the contour of the hill and be run perpendicular to the direction of the slope. If you have questions or if we may be of further assistance, please call the office. Sin ely, Robert F. Nelson, President Table 3 Septic Tank Capacity Based on Number of Bedrooms MinimumEffective Liquid k of Bedrooms Tank Capacity {gallons) I orless 750 3_.-. 1D011 ^ 012 4 50 � ach additional bedroom Table 4 Maximum Loading Rates of Fluent Volume for Soil Absorption Systems Percolation Rate Typical Soil Textures Maximum Loading Rate _(minutes/inch) Soil Class (Appendix 2) sq.lt./day) 0-10 1 Sand 1.30 11-20 II Sandy Loam to Loam 72 21-30 RI Loam .50 31-40 IV Loam to Silty Loam .40 4 t -60 V _ Clay Loam 30 (me, GD — — VI Clay .20 Table 5 Required Square Footage of Soil Absorption Systems Required Bottom Requlred Bottom Absorption Area In sq. It Absorption Area in sq. IL Required Sldewall Area' Per Bedroom' for Per Bedroom' for Soil Class Standard Trenches Seepage in sq. It. per Bedroom' for Beds Seepage Pits 1 165 215 185 if 300 400 335 III 440 575 IV 55Q 450 e V..----"'...-. 7411.-- r VI s ''Minimum number of bedrooms rs two (21 Absorption area for seepage pits is figured as effective sid,w,lI area beneath the inlet. 'Unsuitable for seepage pits if percolation rate is over thirty (30) minutes per inch. ' Unsuitable for seepage beds if percolation rate is over one inch (1') in thirty (30) minutes 'Unsuitable for conventional absorphon systems. Nelson Environmental & Wastewater Solutions Ltd. E W November 22, 1993 SMr. and Mrs. Robert Durham c/o Filoha Meadows 14628 Highway 133 Carbondale, CO 81623 Subject: Soils Evaluation and Percolation Test for Individual Sewage System Design for a Parcel of Land in Sections 18, Township 9 South, Range 88 West of the 6th P.M. Dear Melody and Bob, As requested, Nelson Environmental and Wastewater Solutions, Ltd., performed a soils study and percolation testing to design a septic system for the proposed residence. We conducted this study according to Section 4-5 of Pitkin County Regulations Individual Sewage Disposal Systems on Monday, July 12, 1993. We have based our recommendations on the subsurface conditions encountered. Please furnish this letter to the Aspen/Pitkin Environmental Health Department at your earliest convenience in order to obtain a permit to construct this individual sewage system. Proposed. Construction: The planned residence is a �\ .ta���_.bedroo� two ancJ_ o-ne-ha 1 f bathroom house. There is an attached office and a future ca aket unit proposed as well. The property is to be served by an individual well. The lot is approximately 2 acres in size. Site Conditions: The site: is a lot in the Crystal River Valley to the East of the highway, river, andoldrailroad grade. The building site is approximately 100 feet above and 300 feet from the Crystal River. The ground surface, which appears natural in the proposed area of the absorption field, slopes gently to the West at a 5% grade. It is an open meadow with several clumps of cottonwood and aspen trees. Subsurface Conditions: A soil profile pit, within 10 feet of the proposed absorption area, was excavated while we were there on June 22, 1993. The excavation revealed that no groundwater or bedrock was pr sent within eight and one --half feet of the sur ace o the ground. In general, the subsoil consisted of a reddish silty loam with numerous small blocky cobbles and flagstone fragments, three inches to three feet in diameter. P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 Horre. (303) 923.2766 Proposed Durham Residence Soils Evaluation and Percolation Test for Individual Sewage System Design • November 22, 1993 Page 2 The subsurface soil conditions were evaluated with the standard Percolation test procedures at the approximate location shown on Figure 1. The test holes were excavated with a backhoe to a depth of two to three feet and completed by hand. Preparatory to the test, the sidewalls were scrapped, and three inches of gravel was placed in each test hole. Percolation Testing: Percolation testing was performed in the proposed absorption trench area North of the residence. This testing was performed in three of the shallow holes excavated to a depth of between thirty-two and thirty-eight inches. The percolation holes were pre-soaked by adding water approximately every two hours for an eight hour period before beginning the percolation test. The results of the percolation testing are presented in Table I. These results indicate the silty loam soils have an average percolation rate of 50 _minutes per inch, a satisfactory percolation rate under Pitkin County criteria This rate may have been slowed by the numerous rock fragments present in the sidewall of each of the test hole. The same circumstances explain the variability of the percolation rate between the test holes. Limitations: This report has been prepared in accordance with generally accepted practices in this area for use for sewage disposal design purposes. The conclusions and recommendations submitted in this report are based upon data obtained from our site visits at the location indicated. There is some possibility that the nature and extent of variations in the subsurface soils across the site may not have been evident at the time of this investigation. Additional evaluation may be required if further excavation reveals conditions different from those described. This office should be advised of these situations as soon as possible so reevaluation of our recommendations can be done. If you have questions or if we may be of further assistance, please call the office. Sincerely, Robert F. Nelson, REHS President Attachments Reviewed by: / J y Hammond, P.E. chmueser, Gordon,ij�� 26078 • ����'�i1N111?If4111U Ho x lo 0 aCl, 01/16/1994 11:23 3633566 I OZC AN P j>�"G°F�Ei�TY 1 lN,-fr uG.�i� FILOHA MEADOWS PAGE 02 FIGURE 1 Durham Residence 15200 ? Highway 133 p 3� Lc; PkcW* ~-.... 40 ur,,r S 7C i t.�elm WMx. fbFj A,S PC N L4 A4 0 SFe Aj d 01/.19/1994 11:23 9633566 FILOHA MEADOWS PAGE 03 Nelson EnvtronnwxtW 6 WasteuwW SolutIom Ltd E W S TABLE I PERCOLATION TEST RESULT FORM Durham Property Date of Percolation Test: 7/12/93 Length Depth at Depth at Average Hole Hole of Interval Start of End of Percolation No. Depth( in. ) (Minutes) (Inches) (Inches) Rate(Min./Inch) 1 34 10 2 1/8 1 5/8 (refill) 15 2 9/16 1 7/8 (refill) 10 2 11/16 2 1/4 (refill) 10 2 1/4 1 3/4 20 2 32 13 3 1/2 3 (refill) 15 5 3/16 4 7/8 (refill) 12 5 3/4 5 5/8 (refill) 10 5 5/8 5 1/2 80 3 38 12 4 13/16 4 9/16 10 4 9/16 4 3/8 13 4 3/8 4 3/16 (refill) 10 4 13/16 4 11/16 (refill) 10 5 1/16 4 7/8 10 4 7/8 4 11/16 53 Durham Property Date of Percolation Test: 7/12/93 Nelson Environmental & Wastewater Solution, Ltd. Ei vNviay r�uuca.a.a. n�+rruy vv W Legal Description: A Tract in Section 18, Township 9 South, Range 88 West of the 6th P. M. S Property Owner: Name Bob and Melody Durham Address 14628 Highway 133, Carbondale, CO 81623 Phone 963-1806 Contractor: Excavating Contractor: Name Owner Name Dorais Excavatinq Address Address 511 Dorais Way. Redstone, CO 81623 Phone Phone 963-2670 Saturation and Shelling o Smeared surfaces femoved X Yes o Gravel Added X Yes To a 3 or 4" Depth o Date and'rime presoak water added 7/12/93 (d! 1:15 p.m. o Amount of presoak water added 10 to 15 gallons /hole o Water remaining in holes after presoak? Hole l: Yes X No Hole 2. A I CJ IN V Hole 3: X Yes No Percolation Rate Measurement Hole 1: 20 minutes/inch Hole I : 80 ❑wrutes/uich Hole 1: 53 minutes/inch AVERAGE 50 rntinuteslinch Groundwater: o Not Encountered to 8 ft. u Es[irrlaled depai to higll seasonal water if not encountered- 80 feet o Is area believed to be subject to seasonal fluctuations which could result ul a seasonal water [able? _ Yes X No Slope in absorption area 10% to the East Bedrock o Not Encountered o Estimated depth if not encountered -70 ft. o Type of bedrock: XSarldstolle Claystorle Siltstone Other. Fractured Weathered u Is bedruck believed to be permeable? —Yes _No X N/A I certify that the above information is correct and complete to the best of my knowledge and that all tests were performed in accordance with the provisions of Pitkin County Individual Sewage Disposal Regulations, Section 4-5.1 through 4-5.7. / �i � Reviewe Robert F. Nelson Jay H mo d, . E. President Sch eus G rdon, Meyer Engineer,:_; j;;::,,;,,«���y�i .Y O • ° -�t 26078 � 11Z'Cc W P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 Home (303) rrmin��� Are,son Environ mentri S,, Wcastel-vater Solution., Xtd E W December 12, 1994 S Mr. and Mrs. Robert Durham c/o Filoha Meadows 14628 Highway 133 Carbondale, CO 81623 Subject: Soils Revaluation and Percolation Test for Individual Sewage System Design for a Parcel of Land in Sections 18, Township 9 South, Range 88 West of the 6th P.M. Dear Melody and Bob, As requested, Nelson Environmental and Wastewater Solutions, Ltd., has performed another soils study and percolation test to modify the design of a septic system for the residence under construction. This was necessitated since the owners of the fifty foot strip along the old railroad grade were not willing to grant an easement to construct the septic system in an area where gravity flow was possible. In addition, by moving to the South of the house and off a small ridge, the soil in the area of the relocated absorption field was less rocky and the topsoil was developed to a greater depth. We conducted this study according to Section 4-5 of Pitkin County Regulations Individual Sewage Disposal Systems on November 30, 1994. We have based our recommendations on the subsurface conditions encountered at the new septic system area location. We will furnish this letter to the Aspen/Pitkin Environmental Health Department to modify the permit conditions and requirements on this individual sewage system. Proposed Construction: The plan for the residence is now a two bedroom, two and one-half bathroom house. There is an attached office and an additional studio caretaker unit as well. The property is to be served by an individual well already drilled on the property. The lot is approximately 2 acres in size. Site Conditions: The site is a lot in the Crystal River Valley to the East of the highway, river, and the old railroad grade. The building site is approximately 100 feet above and 300 feet from the Crystal River. The ground surface, which appears natural in the proposed area of the absorption field, slopes gently to the West at a 5% grade. Most of the site is an open meadow with several clumps of cottonwood and aspen trees. P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 Home (303) 923.2766 Durham Residence Soils Revaluation and Percolation Test for Individual Sewage System Design December 12, 1994 Page 2 Subsurface Conditions: 161 A soil profile pit was excavated on June 22, 1993. The excavation revealed that no groundwater or bedrock was present within eight and one-half feet of the surface of the ground. The soil in the area proposed for the relocation of the absorption field consisted of a dark sandy loam. Deeper the subsoil consisted of a reddish silty loam with numerous small blocky cobbles and flagstone fragments, three inches to three feet in diameter. The subsurface soil conditions were evaluated with the standard percolation test procedures at the approximate location shown on Figure 1. The test holes were excavated with a backhoe to a depth of two feet and completed by hand. Preparatory to the test, the sidewalls were scrapped, and three inches of gravel were placed in each test hole. Percolation Testing: Percolation testing was performed in the proposed absorption trench area South of the residence. This testing was performed in three of the shallow holes excavated to a depth of between thirty - and thirty-two inches. The percolation holes were pre-soaked by adding water eight hours before beginning the percolation test. The results of the percolation testing are presented in Table I. These results indicate the sandy loam soils have an average percolation rate of six to seven minutes per inch, a satisfactory percolation rate under Pitkin County criteria. This rate is probably more indicative of the soil in the area, not having been slowed by the numerous rock fragments present in the sidewall of each of the test holes as was the case in a previous percolation test to the North of the residence. Minimum Pitidn County Requirements: The percolation rate of the soils were measured at an average of 6 to 7 minutes per inch at depth from 2 1/2 to 3 feet in the new absorption area location. The minimum Pitkin County requirements for the installation are based on an eventual sewage flow to the absorption area of 450 gallons per day from the two units in the house. This flow would require a septic tank of 1000 gallons minimum volume, and a minimum of 500 square feet of standard absorption trench, defined as follows: A standard absorption trench is an excavation less than three -feet (3') wide and containing Durham Residence Soils Revaluation and Percolation Test for Individual Sewage System Design December 12, 1994 Page 3 a single 4 -inch (4") perforated distribution pipe in the center. A minimum of six -inches (6") of 1/2 inch to 2 1/2 inch diameter gravel is placed under the distribution pipe. A sufficient amount of additional gravel is placed around and over the distribution pipe and to bed and cover the pipe with a minimum of two inches (2") of gravel. A minimum of two trenches is required for any absorption trench installation. Recommended On-site_ Wastewater Disposal Designs: Because of the necessity for shallow seepage trench installations in the soil material exhibiting the best percolation rates and the location on the South portion of the property above the lower level of the house, it appears that a sewage effluent ejector and pumping chamber will be needed to properly connect the lower level plumbing. We recommend that a 1250 gallon septic tank be installed close to the foundation to receive gravity flows of wastewater from the residence. An effluent filter like the Zabel A-100 unit (brochure attached) should be fitted on the effluent line of the septic tank to minimize the discharge of suspended solids, grease and organic material to the absorption systems. This will benefit the system operations by controlling the effects of surge loadings of wastewater from the laundry much more effectively than the standard outlet tee. The location of the septic tank below the absorption area will also require that a 1000 gallon pumping chamber and pump system be installed to lift the septic tank effluent to the seepage area located above the level of the caretaker unit floor. A pump sized to deliver 30 gallons per minute against 10 feet of head should be sufficient to achieve equal distribution and lift to a surge tank and the absorption trench area. We also believe that, in general, the minimum component set -back distances on the site and the long trucking distance to obtain gravel, make'the use of gravel -less systems more attractive and economical. We would suggest that you plan to use this method for construction of the sewage systems. Use of "Infiltrator" leaching chambers permits a 50% reduction in standard absorption trench area under County regulations. This reduction is based on manufacturer's claims and on an approval of such a reduction by the Colorado Department of Health, Water Quality Control Division. Therefore, the suggested design incorporates the alternative listed above. We recommend that this septic system absorption area consist of at least two separate seepage trenches placed on contour with dimensions of three feet by fifty feet. A total of sixteen sections of "Infiltrator" is required to construct the system and can easily be placed in the two proposed trench excavations. It is required that the trenches be excavated as shallow as possible, but to a Durham Residence Soils Revaluation and Percolation Test for Individual Sewage System Design December 12, 1994 Page 4 depth of at least two feet below existing grade on the downhill edge. The trenches should be spaced six to ten feet apart. The bottom of the trenches must be level. It is advisable to use a small surge tank to receive flow from the pump. The pumped flow can then be dampened and flow by gravity to feed the trench system. The flow can be equalized and split to the two trenches with the Zabel Z-200 Flow Divider (brochure attached). Limitations: This report has been prepared according to generally accepted practices in this area for use for sewage disposal design purposes. The conclusions and recommendations submitted in this report are based upon data obtained from our site visits at the location indicated. There is some possibility that the nature and extent of variations in the subsurface soils across the site may not have been evident at the time of this investigation. Additional evaluation may be required if further excavation reveals conditions different from those described. This office should be advised of these situations as soon as possible so reevaluation of our recommendations can be done. Further, if the use of shallow absorption systems is not considered practical, we should be notified to evaluate the effect of the changes on the proposed sewage disposal systems. If modifications to these designs are made by the governing Health Department, we should also be notified so that we may reevaluate the impact of the changes on the suggested designs. If you have questions or if we may be of further assistance, please call the office. Sincerely, i obert F. Nelson, REHS President Attachments Reviewed by: U ay ammond, P.E. Schmueser, Gordon, Meyer cc: Aspen/Pitkin Environmental Health Dept. Duane Piffer Trucking and Excavating Nelson Environmental c> Wastewat-er Solutions. Ltca E TABLE I W S PERCOLATION TEST RESULT FORM Hole Length Depth at Depth at Drop in Average Hole Depth of Interval Start of Interval End of Interval Water Level Percolation No. (in.) (Minutes) (Inches) (Inches) (Inches) Rate(Min./Inch) 1 30 6 13/4 7/8 7/8 (refill) 6 11/2 5/8 7/8 (refill) 6 23/16 1 1/4 15/16 6 1 1/4 7/16 13/16 (refill) 6 41/8 25/8 1 1/2 6 25/8 17/8 3/4 8 2 30 6 43/4 0 43/4 (refill) 6 31/8 113/16 15/16 6 1 13/16 0 1 13/16 (refill) 6 61/2 5 1/8 13/8 6 5 1/8 37/8 1 1/4 5 3 32 6 3 3/8 2 1/4 1 1/4 6 21/4 5/8 1 5/8 (refill) 6 4 211/16 15/16 6 211/16 19/16 11/8 (refill) 6 411/16 31/8 19/16 6 3 1/8 2 1/8 1 6 Bob and Melody Durham Property Highway 133 Date of Percolation Test: 11/30/94 P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 Horne (303) 923.2766 Nelson Environmental & Wastewater Solutions LtA E Property Address: Highway 133 W Legal Description: A Tract in Section 18 Township 9 South, Range 88 West of S the 6th P. M. Property Owner: Name Bob and Melody Durham Address14628 Highway 133 Carbondale, CO 81623 Phone 963-1806 Contractor: Excavating Contractor: Name Owners Name Duane Piller Address Address622 Redstone Blvd. Redstone, CO 81623 Phone Phone 963-1594 Saturation and Swelling o Smeared surfaces removed X Yes o Gravel Added X Yes To a 3 or 4" Depth o Date and Time presoak water added 11/30/94 A 9:15 a.m. o Amount of presoak water added 10 gallons /hole o Water remaining in holes after presoak? Hole 1: Yes X No Hole 2: Yes X No Hole 3: Yes X No Percolation Rate Measurement Hole 1: 8 minutes/inch Hole 1: 5 minutes/inch Hole 1: 6 minutes/inch AVERAGE 6 minutes/inch Groundwater: o Not Encountered to 8 ft. o Estimated depth to high seasonal water if not encountered- 80 feet o Is area believed to be subject to seasonal fluctuations which could result in a seasonal water table? _ Yes X No Slope in absorption area 10% to the East Bedrock o Not Encountered o Estimated depth if not encountered -70 it_ o Type of bedrock: X Sandstone Claystone Siltstone Other: Fractured Weathered Is bedrock believed to be permeable? Yes No X N/A I certify that the above information is correct and complete to the best of my knowledge and that ail tests were performed in accordance with the provisions of Pitkin County Individual Sewage Disposal Regulations, Section 4-5.1 through 4-5.7. Robert F. Nelson President Reviewed by: e mond, P.E. Ser, Gordon, Meyer n s t P.O. Box 6961 Snowmass Village, CO. 81615 Office (303) 923.3289 12/23/1994 10:02 3039232766 BOB NELSON, NEWS,LTD 9 PAGE 02 �flow1lector 'V1 �r a e..' LawoW ti0n boxes and pipe manifold. are also more effective{��<i caster istrib BRAN D NEW FOR 94 - The Zabel Flow Divider ld f sh nnecl Y v al es�They : u P`�L and carry Z,thel's ualtt in ection molde „nd The Z,thel Fli iw Director replaces expens►� e, The A'arr;tnty dt�` not tt, install. All Zahe1 products are manufactured from high Q ' y 1 or r�movaI or reinstallatit�n, want if p�rrts fail due to manufacturer co s iia in lalxx f orktranship. Lifetime Wa Y Zabel all d include replacement party not sold by Flow Divider - Z200 the 1. Thr Fleur k Divider meanstc f ates patented entralgwc .optic tank Y designth t Ij�v�derlis not perfectlye flOWis ylevell, even if the Fly 2. The inlet pipe of the Flaw Divider is constructed So that effluent illflow o pix it and down into the crosspipe in ;. Distribhacs� �,wubjectr c h frost rheave ordg ground 4 folds settling, 4, Testing shows that even with a Level discrepancy of 1/8,, ter more between the right and left Pott, the division of the low distorts �he flost 5w under these I)-K11x ter man same conditions. Special Features! • Manufactured from if molded PVC. • Always insures an even flow. • 17oesn't create solids build up. • Will nut clog. • Lifetime Warranty. Laboratory Test Results using 1000 ml sample" a 3 R1'm Averagge Level Distribution Right Part 50.0Y9, Left 1 ext 49-97% 1115„ Tilt 50.2% Richt tort 49.8`% Left Port 118" Tilt R. hr t Purr Lett Port 51.3% 49.8% Flow Director - Z200 -D 1 Fslee.D valve in><alle rect - I to distribute rhe eow Divider with a filu• ented ent flow to a Pti�nary field of your chuicc an allows the secondary field to rest until ncedc�l. 2 -r-l1e how Divider automatically redirects fieldrY ah { flew from thePrimary o ume� w n r t� change the does nor dep sled°e vah'e Flow homeowner tochange valve is dependent: time. Unfortu- the flow direction at the Proper en ;end a pruh, nately, this usually does nor ha .r le Bevel watersan contamination. ent k out result- ing in ground 3. AC the time the service et►mpan ytic t, ank is lcanlied redirect the the alto tan primary field the (TT"tunity ru flaw allowing the rest. Questions concerning 200 Flow DrFax y de 1.800,221-5742 r • Zabel Z200 -U Mw ul"c" 339-g6�9 for further information�� -7 1- C�`f 3 -oo-ora B & R Septic I Invoice 1555 Hwy 133 0603 Handy Dr. Carbondale, CO 81623 (970) 963-3814 BILL TO Robert Durman 14628 Hwy. '133 Carbondale, CO 81623 Invoice Number: 122190 P.O. Number: JOB SITE Robert Durman 14628 Hwy. 133 Carbondale, CO 81623 Invoice Date: 20 -Apr -99 Job Description: 122190 LQuan vij - _ ServiceType r Amount i Tax x2 Workers 1 Warrant _(Days) 1 Septic Pumping $265.00 No No 0 Subtotal NonTaxed: $265.00 Subtotal Taxed: $0.00 @ 0% Tax: $0.00 Subtotal: $265.00 Less Payment: $0.00 Please Pay: $265.00 Payment Terms: Net 10 0-� rv� P- /04/ HAZARD REV/EW SITE PLAN FOR SUSAN OLDS PITKIN COUNTY, COLORADO Stele:"=tco' too 50 o loo 100 300 WAIVER Applicant acknowledges that he/she has been informed by Pitkin County of the existence of "1041 Hazard Areas" that might affect the property, any improvernents and the use and occupancy thereof. APPLICANT'S NAME: Sugavl �lc�e \ \ SOo"IOW 41,14$',• _ l 3 \ to0o\ �r8�7 ms's, Sc.o- e,: LEGAL DESCRIPTION A parcel of land situated in the NE'/4 SEY4, SE'/4 SETA and SETA NE'/4 Section 17, Township 10 South, Range 88 West of the Sixth Principal Meridian lying easterly of the easterly bank of the Crystal River, southerly of the northerly line of said SE'/4 NEI/, and westerly of the easterly line of said Section 17; said parcel of land is described as follows: Beginning at the East Quarter Corner of said Section 17 being an i'r n pica with a brass cap and properly marked; thence S 00°02'09" E 1639.52 feet along the ea�la y lire of said Section 17; thence N 89°28'22" W 245.89 feet; thence S 85°03'34" W 112.29 feet; thence S 7713'17" W 93.92 feet; thence S 800122" W 69.32 feet; thence N 57° 15'24" W 56.58 feet; thence N 61054'01"W296.61 feet to a point on the easterly bank of said Crystal River; thence N 24°32'49" E 240.79 feet along the easterly bank of said River; thence N 39°29'17" E 315.04 feet along the easterly bank of said River; thence N 26°48'23" E 239.33 feet along the easterly bank of said River; thence N 01 °18'34" E 303.27 feet along the easterly bank of said River; thence N 07°42'21" E 726.22 feet along the easterly bank of said River; thence N 18°54'57" E 864.69 feet along the easterly bank of said River; thence N 66°32'25" W 76.67 feet along the easterly bank of said River; thence N 0543'52" W 276.22 feet along the easterly bank of said River; to its intersection with the northerly line of said SEI/,NEA of said Section; thence N 88°03'00" E 135.42 feet more or less along the northerly line of said SEI/.NEI/4 to the Northeast Corner of said SE'/. NE'/,; thence S 00°10'00" W 1321.98 feet along the easterly line of said Section 17 to the East Quarter Corner of said Section, the point of beginning. Excepting therefrom those portions described in instruments recorded in Book 188 at Page 493, in Book 190 at Page 598, in Book 192 at Page 89, in Book 192 at Page 211, in Book 199 at Page 06, in Book 252at Page 749 and in Book 286 at Page 273, Pitkin County, Colorado records. Excepting Also A tract of land situated in the SEI/4 of Section 17, Township 10 South, Range 88 West of the 6th P.M., Pitkin County, Colorado; said parcel lying easterly of Redstone Road and being more particularly described as follows: Commencing at the East Quarter Corner of said Section 17, a Brass Cap in place; thence S 10033'14" W 1017.24 feet to a fence corner in place, the True Point of Beginning; thence S 89°55'04" W 167.55 feet to a fence corner in place; thence S 12°46'30" W 136.96 feet to a fence angle point in place; thence S 09000'30" W 62.85 feet to a fence angle point in place; thence S 02°16'26" W 199.86 feet to a fence angle point in place; thence S 06°37'40" W 43.40 feet to a fence corner in place; thence N 89054'34" E 213.62 feet to a fence corner in place; thence N 0015'23" E 399.62 feet to a fence angle point in place; thence N 07039'17" E 39.09 feet to a fence corner in place, the True Point of Beginning; said parcel containing 1.976 acres, more or less. The resulting acreage of the above described parcel of land is 18.24 acres more or less COUNTY OF PITKIN t STATE OF COLORADO SURVEYOR'S CERTIFICATE 95H, - -- — p- I, Sydney Lincicome, do hereby certify that I am a registered land surveyor licensed under 3�0 8 p c \ �� the laws of the State of Colorado, that this Site Plan is a true, correct and complete plat 012 o pec: - ? of a 1041 Hazard Review as shown hereon, that said Site Plan was made from an accurate survey of the real property described hereon by me and under my direct co° r N BuCicdll+�Q �d���o Q ;3 supervision and correctly shows the location and dimensions of the property and of the t,to !10.00' --}� (J .� building envelope. This survey is true and correct to the best of my knowledge and belief. ✓c�qosel ac-c_eS-> o In witness whereof I have set my hand and seal this day of ICma}- �� A.D., 199— . Sydney Lincicome P.L.S. 14111 S85°o3'_3�1_'W t2. 2q JQ �o�EXce�covt. 1 Scot°l8'3'�"f= 303.E-7' �-�60 t X39 3 56,58' 9•� _f ie Approved 1041 Hazard Review 3/ �k by: Date: Pitkin County Planning Director ACCEPTANCE FOR RECORDING This 1041 map has been accepted for filing in the office of the Clerk and Recorder of Pitkin County, Colorado on this day of , A.D., 199_in Plat Book _ at Page as. Reception No. Clerk and Recorder