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Home My WebLink Aboutpitkin.eh.264326101001 (2009)lc=lov IN Permit #: 09009 JNSITE WASTEWATER TREA{ qNT SYSTEM (OWTSr CONSTRUCTION PERMIT 0405 Castle Creek Road, Suite 10 - Aspen, CO - 81611 Phone: 970.920.5070 Fax: 970.920.5077 Parcel ID #: 2643-261-01-001 Permit Issued: ❑NEW ®REPAIR ❑REMODEL/ADDITION ❑TANK ONLY ❑FIELD ONLY []AMENDMENT Owner(s): Leslie and Ethel Towne Property Address Legal Description 567 N. Starwood Drive Lot 83. Starwood Size of Lot: 2.17 Size of Building: 4400 Acres Detached Accessory Unit: OYES ®NO Sq. Ft. Size of Accessory Unit: n/a Sq. Ft. The system is designed for: 5 bedrooms: Upper Floor— Master Bedroom, Main Floor— 1 bedroom, Downstairs — 3 bedrooms. Designed By: Church OWC, LLC Phone #: 720-898-3434 Fax #: 720-898-3455 Perc Rate: 80 mpi Minimum Tank Capacity: Project #: C550 Dated: April 6, 2009 Mailing Address: 9590 West 14th Avenue, Suite 100, Lakewood, CO Email Address: Profile Hole Depth: ?* 1406 gallons Depth to Groundwater or Bedrock Minimum Absorption Area Permit Conditions: 2254 sa ft w/ 20% reduction This OWTS Construction Permit is approved on the condition of compliance with the engineer design as submitted with the application and the specifications cited above. Changes must be approved by this Department and the engineer prior to construction. This design addresses the improper installation of ISDS Permit 07080. ISDS Permit 07080 was issued to address a failing system. The system that was installed subsequent to this permit, as documented in an as -built letter from Church OWC, LLC dated September 17, 2008, included a new 1250 gallon single compartment tank, a 1000 gallon two-compartment tank with a pump, and four drainfiled zones including the existing drip irrigation piping and new gravelless chamber trenches. The as -built letter also indicates that a profile hole was excavated at the time of the field installation to determine if there was groundwater flowing from the south to the drainfield area. No groundwater was observed; *however, the depth of the pit was not documented. Figure 2 and Figure 4 of the April 6, 2009 design illustrate changes that need to be made to the existing system. Figure 2 and Figure 4 highlight the need for replacement of a riser and lid and reinstallation of exterior splice box on the 1000 gallon tank, as well as regrading and recompacting of the area. 2 additional Quick 4 chambers should be added to the 4 existing trenches. Inspection ports on the end of each trench should be brought to grade, and there should be at least 12" of soil over all chambers. This Permit must be kept on-site during installation. The engineer must do a final inspection of the installation and submit an "as -built" letter to this Department within 30 days of the final inspection, unless a longer period of time has been agreed upon, in writing. This Department must also be called for the final inspection with a minimum of 48 hours notice. Minimum horizontal distances between components of the system and physical features shall conform to the requirements of the Pitkin County OWTS Regulation. This Permit is conditioned upon the property owner(s) providing for regular inspection, cleaning, and maintenance of the system by qualified personnel, in accordance with the manufacturer's recommendations and the requirements of the Pitkin County OWTS Regulation. THIS PERMIT IS EXPRESSLY CONDITIONED UPON COMPLIANCE WITH ALL REQUIREMENTS OF THE PITKIN COUNTY OWTS REGULATION, INCLUDING BUT NOT LIMITED TO THOSE CONDITIONS SPECIFIED ABOVE. Plans and specifications for the proposed OWTS have been reviewed and are considered satisfactory. Permission is hereby given to the property owner(s) to perform the work indicated in accordance with the Pitkin County OWTS Regulation. This Permit will expire 1 year from the date of issuance unless construction on the system has commenced. An "as -built" drawing must be submitted and approved by EH/NR before final approval of the system will be issued. Issued By: L Date: qlj��j Expires: IJ Installer: t � License #: Reactivation Authorized by: r Final Approval sued By: Dati: New Expiration Date: FeepaW 11 061Zo(Z r— INSITE WASTEWATER TREATIV JT SYSTEM (OWTS) CONSTRUCTION PERMIT APPLICATION EH/NR �0405 Castle Creek Road, Suite 10 - Aspen, CO - 81611 Phone: 970.920.5070 Fax: 970.920.5077 Parcel ID# (available from the Pitkin County Assessor's Office I 1 970-920-5160 or at www.pitkinassessor.org): 9-� Purpose of Permit: ❑ NEW REPAIR DUE TO FAILURE ❑ REMODEL/ADDITION ❑ TANK ONLY ❑ FIELD ONLY Cost of System Repair or Remodel/Addition (approximate): D O O O Q — Property Address: 567 IV Lot: 53 Block: Filing: Subdivision: Property Owners)*: /- �� / / E � /� / '�D /� E}�l Address: Owner's Mailing Address:!�� / �^ �OO City, State, Zi cJ N �1 Y/� • /`f Home Phone: Business Phone: `Contact information must be provided for the owner signing this application. Prima act Person/Ant not own CQmpany:�^� O� LCL C tat pli ant Ma' i Add r / (/ sn5 /D D City, Stav/te%ZiC.� D 2 /S Cell Phone:/ 4-6 7:20- 272- (O Business Phone, 2 A Fax Number: 720 - 898 -3 455 Email Address: hlogl h@couic, 7co Building Permit # (if applicable): Lot Size (in acres): 2,17 '/7 Size of Building (square feet):4-400 Number of Potential Bedrooms: Detached Accessory Unit? ❑ YES KN 0 Size of Accessory Unit (square feet): Number of Potential Bedrooms In or Fixture List for thd Accessory Unit: Water Source: ❑ PRIVATE WELL ❑ SURFACE WATER ❑ SPRING OMMUNITY/PUBLIC WATER SYSTEM Name of Community/P blit Water System (iflica ap I S r4 DD D DG/ T -14A/ O/S71K�,/ C T Engineering F?m' ' Job Number: Phone Number: Fax Number: Cf -1 ©AISI 7 50 729- -3 3 fS98-34s Maili Ade City, � State, Zip: PLEASE READ BEFORE SIGNING: I certify that the above information is complete and accurate and that I have provided complete and accurate information in all of the documents included in my application package. 1 acknowledge that EH/NR may revoke any permit I am issued if my application is found to contain any inaccurate, false, or misleading information. I understand that no construction may be undertaken on an OWTS until an OWTS Construction Permit is issued. Own i ature: Date: .� 1,12 f a8 Applic t; ignature: Date: � l2- D ' FIOR OFFICE USE ONLY Received by E�Nq/HR Staff: Fee & Receipt #: Date: % }Gays 6o -j }oejuoo }uawljedaa y11e@H leluauauoJinu3 Ajunoo ui)l;!d w -. k CHURCH OWC, LLC Onsite Wastewater Consultants November 2, 2012 Mr. & Mrs. Roy Martayan 567 N. Starwood Drive Aspen, CO 81612 Subject: OWS Repair Installation Observation 567 North Starwood Drive Pitkin County, Colorado Job No. C550 Pitkin County Permit 97080 Mr. & Mrs. Martayan, As requested, CHURCH Onsite Wastewater Consultants, LLC (COWC) performed site visits to observe the installation of the onsite wastewater treatment system (OWTS) at the subject site. COWC prepared OWTS design documents under Job No. B550 dated April 6, 2009. A site visit was performed on March 23, 2012. At the time of the site visit the house had been sold and was in the process of being remodeled. Excavation for utility lines and site grading in the area of the septic tanks made it unfeasible to make an accurate assessment of the condition of the system. The system was the original system from the previous owners. The house was remodeled from a 5 -bedroom residence to a 4 -bedroom residence which can reduce the impact of water use on the OWTS. A site visit was performed on October 30, 2012. At the time of the site visit the tanks were available to be observed, lids were removed, fluid depth was observed and the floats were lifted to determine whether the alarm and pump operated properly. The High Water Alarm Float sounded the alarm on an SIE Rhombus alarm box. The original Orenco control panel had been removed at the time of the remodel, and replaced with the alarm panel. The OFF Float started the pump, as did the ON Float, independently. The contractor was informed that the float function would have to be changed to the original configuration. The alternating distribution valve was checked and found to be clean, and exposed inside the valve vault. The depth of ponding was checked in the chambered drainfield section. No ponding was measured. A site visit was performed on November 2, 2012. At the time of the site visit, a new Orenco 'S' Model panel has been installed, and the float operation was checked and found to function properly, with both the OFF and ON Floats needing to be raised to start the pump, and the OFF float only shutting the pump off. The High Water Alarm Float sounded the alarm horn and illuminated the light in the panel door. P.O. Box 5146, Golden, CO 80401 Voice 720-898-3434 FAX: 720-898-3455 a OWTS Installation Observations, B945 November 2, 2012, Page 2 The pump was operated using the MANUAL toggle in the control panel, and found to function properly. A pump check of the ADV was not conducted to ensure that the ADV is operating properly, as the dosing tank had not filled to a level that provided fluid to the pump. The observed components of the OWTS appear to be installed in general conformance with the CHURCH OWTS design, plans and specifications. This letter provides information from observations made during two visits to the subject site by COWC. COWC observed installed components of the OWTS. COWC did not observe the installer's methods or the equipment selected by the installer and/or client. Neither the observations nor the contents of this letter imply a warrantee or guarantee of materials or workmanship. Without continuous observation of the installation process, COWC is not able to assure that elements of the system comply with the intended functionality of the design documents. If there are questions, please call. Sincerely, CHURCH Onsite Wastewater Consultants, LLC Robert W. Wrigr Principal 3 electronic copies sent Reviewed By: a c Kathryn E. Carney, E.I. Principal Copy to: Mr. Roy Martayan, baymar@the-beach.net Copy to: Mark Friedland, aspenstarwood@gmail.com and spsweeney6@gmail.com Copy to: Pitkin County Environmental Health Department, ATTN: Mr. Bryan Dougherty, 76 Service Center Road, Aspen, CO 81611, bryan.Daugherty@co.pitkin.co.us Carla Ostberg From: rwright@cowc.info Sent: Sunday, March 25, 2012 11:08 AM To: Carla Ostberg Subject: Towne Final Carla, How are you doing? You looked kind of tired Friday, so I am just checking to make sure all is well with you I made it out to the Towne residence at 567 N. Starwood Drive on Friday, before the Eagle County thing. There can't be a final for a while. They have regraded the site, removed the control panel and wiring, pushed regraded soil over the tank lids and broken one of the risers. There is still too much snow for me to check the fields. I am anticipating that I will have to coordinate with Shannon Sweeney to figure out when the best time to revisit the site will be. I don't want to be called out before they have everything back together. Will you please put a note in the file, indicating that COWC will provide a final letter, after we have seen the system back in working condition? Thanks very much, Robert W. Wright, PE CHURCH Onsite Wastewater Consultants, LLC 9590 W. 14th Ave, Suite 100 Lakewood, CO 80215 Office: 720-898-3434 Cell: 720-272-6469 Email secured by Check Point § ■ \ � \ \ � \ o � i \ � ) \yC \ �2 ) ; O/oz i i §E§®/§ r\ujm \§mei (�$\\ ® ` �+, c Wo} \_§§ fr ` k } oo (})� \Zi co \w/wC\e R / � ,<:® § § $§/) � 0 § =Jo=tee CIO §� \z 2z w » § i © ƒ G:[ \ n< \\ � /? � ] I .. a \ q� � \0 COO 2; i } ) � \ _j_ -cam �2 ) ; � o=/\ ) r\ujm \§mei ® ` �+, c Wo} \_§§ fr ` k } oo (})� \Zi co I R \ � � Z3a�\7)w?«« 2; E« _j_ -cam ) ; o=/\ ) o z \§mei ® ` �+, c \_§§ 0 ®)f~ ` k } oo (})� co R o (nw t § « 2n 0t om,\ § / o » 0\ \ i © ƒ A \ / \ o �r 2; E« _j_ -cam ) ° o=/\ 00 /\ ® ` �+, c 0 ®)f~ co R o (nw t « 2n 0t » 0\ \ i © ƒ A s CHURCH OWC, LLC Onsite Wastewater Consultants August 7, 2009 Mr. and Mrs. Lester Towne 567 North Starwood Drive Aspen, CO 81612 Subject: OWTS Drainfield Observation 567 North Starwood Drive Pitkin County, Colorado Job No. C550 Mr. and Mrs. Towne, I �f Church Onsite Wastewater Consultants, LLC, (COWC) made a site visit to the subject site in the early afternoon of August 4, 2009 to check the fluid level in the monitoring pipes of the upper, chambered drainfield, and the 2 -inch monitoring pipe below the upper drainfield. This site visit was made to maintain an understanding of the fluid levels that the upper drainfield is experiencing. COWC has logged the past 3 -months worth of readings in the attached spreadsheet. It appears that influence of groundwater has subsided, as indicated in the 2 -inch groundwater monitoring pipe being dry. The lower two chambered trenches continue to have ponded effluent in the two -chamber sections at the distal end of the trenches, and appear to be influencing the upper portions of the trenches during the August observation. The ponding appears to be related to use, as indicated by the low measurements recorded in July. As use is intensified, during periods of bathing, clothes washing or dish washing, doses of effluent can access the drainfield, in shorter periods of time, increasing ponding as the effluent already in the chamber is waiting to be infiltrated. COWC theorizes that effluent discharged to the upper portion of the trench drains to the two lower chambers at the distal end of the trench, and maintains ponding there. A possible solution to the ponding in the end chambers may be to install a low soil berm across the end of the upper trench, inside the chamber, to prevent effluent discharged there from draining to the lower chambers. Please look over the attached spreadsheet. If there are questions, or if you need additional information, please feel free to contact us at your convenience. Sincerely, C Onsite WPE r Con ants, LLC Ide rt rig t, RWW Copy to: Pitkin County Environ. Health, ATTN: Ms. Carla Ostberg, 0405 Castle Creek Rd. Suite #10, Aspen, CO 81611 9590 West 14th Avenue Ste. 100, Lakewood, CO 80215 Voice 720-898-3434 FAX: 720-898-3455 U J J C w N N C O U a) o o 3 cn cn LO O 0 a) > aoo 3 LO 0 u,QO U c s U O v 0 U O � Y Z O �o U rn � n N d w N C t a m 0 a LL rn Q Z` Z v cc) ,n X00-- 00 00 O0 0fl- 00 a Lf) N rn U) M N M NN m co L-0 N Z Z Z Z c 0 E (V c)r = ch d U O N x CHURCH OWC, LLC Onsite Wastewater Consultants July 6, 2009 Mr. and Mrs. Lester Towne 567 North Starwood Drive Aspen, CO 81612 Subject: OWTS Drainfield Observation 567 North Starwood Drive Pitkin County, Colorado Job No. C550 Mr. and Mrs. Towne, Church Church Onsite Wastewater Consultants, LLC, (COWC) made a site visit to the subject site in the early afternoon of July 1, 2009 to check the fluid level in the monitoring pipes of the upper, chambered drainfield, and the 2 -inch monitoring pipe below the upper drainfield. This site visit was made to maintain an understanding of the fluid levels that the upper drainfield is experiencing. COWC noted that the 2 -inch monitoring pipe contained about 2.5 -inches of fluid (17" on 6/5), and the upper, chambered drainfield contained the following levels of fluid: While on site on 6/5/09 with Ms. Carla Ostberg of Pitkin County Health, we noted that the 4 -inch PVC caps to the monitoring pipes were missing, and had been taped over. During this visit, COWC replaced the missing pipe caps and removed the tape debris from the site. If there are questions, or if you need additional information, please feel free to contact us at your convenience. Sincerely, CH U Onsite W s Wltants, LLC Ro rt right, P.E. 1 Copies sent Copy to Pitkin County Environ. Health, 0405 Castle Creek Rd. Suite #10, Aspen, CO 81611 9590 West 14th Avenue Ste. 100, Lakewood, CO 80215 Voice 720-898-3434 FAX: 720-898-3455 CHURCH OWC, LLC Onsite Wastewater Consultants June 1, 2009 Pitkin County Department of Environmental Health & Natural Resources ATTN: Ms. Carla Ostberg, MPH, REHS 0405 Castle Creek Road, Suite 10 Aspen, CO 81611 Subject: Individual Sewage Disposal System (ISDS) Permit 07080 and Onsite Wastewater Treatment System (OWTS) Construction Permit 09009 567 N. Starwood Drive Pitkin County, Colorado Job No. C550 Carla, CHURCH Onsite Wastewater Consultants, LLC (COWC) has received your May 28, 2009 letter to the Townes regarding the repairs to the existing OWTS. In your letter you indicate that efforts to divert water form the chambered drainfield "...appear to be ineffective." At this point in time, we have no evidence that the fluid observed in the chambers is groundwater. It is our observation that this liquid in the monitoring pipes of trenches 3 & 4 is effluent from the OWTS, that is ponding. The interceptor trench was installed a few weeks ago to a depth of about six -feet below the bottom of the chambered drainfield. At last observation, the discharge pipe of the interceptor trench was not flowing water, which indicates that it is not collecting groundwater to discharge. If there was a high groundwater condition below the drainfield, COWC would expect to see a steady flow of water discharging from the interceptor trench to the irrigation ditch. To date, we have not observed flow from the installed interceptor trench discharge pipe. It is our opinion that the situation with ponding in the chambered trenches arises from the soil type underlying the drainfield, and not from high groundwater. On May 19, 2009 COWC augered a 2 -inch monitoring pipe into the soil down slope of the lower trench. Our observation of the soil at that time indicates that at least the lower the drainfield trenches are underlain by a fat clay that exhibits tight, plastic characteristics, and will have low percolation rates. The ponding of effluent, within the trench chambers, is in conformance with the chamber design and manufacturer's literature, and is not seen, at this time as a problem, or out of compliance with current Pitkin County OWTS regulations. If there are questions, please feel free to contact us at your co ence. �p0 Ll� Sincerely, 6 �� CHURCH Onsite Wastewater Consultants, LLC X ' 1 9 Robert W. Wright, PE Principal S0/10NAL EAG cc: the Townes, 567 N. Starwood Drive, Aspen, CO 81611 9590 West 14th Avenue Ste. 100, Lakewood, CO 80215 Voice 720-898-3434 FAX: 720-898-3455 Carla Ostberg From: Robert Wright [rwright@cowc.info] Sent: Tuesday, June 02, 2009 12:10 PM To: Carla Ostberg Subject: RE: C550, Towne OWS Repair Thanks Carla, I am in agreement that the standing liquid is a concern. Shutting off flow to just two trenches is more difficult than we had expected, after looking in to the situation. The current configuration is a 4 -outlet ADV that doses 1/2 of a drainfield at a time. A single cycle through the ADV doses 2 -sections in each of the two drainfields. We will look at that again, and talk to Roger to see if we can rig something. A big problem is knowing where each outlet pipe is directed, so we cut off the correct section. I will let you know what we determine. I'll see you on Friday afternoon. CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 From: Carla Ostberg [mailto:Carla.Ostberg@co.pitkin.co.us] Sent: Tuesday, June 02, 2009 10:56 AM To: Robert Wright Cc: Katie Carney; Rose Ann Sullivan Subject: RE: C550, Towne OWS Repair Thanks Bob, I will meet you up at the Towne residence on Friday afternoon. Call me when you are in the area. After my inspection on May 8, 1 had requested we find a way to stop flow to the area of the new trenches. Had that been done, there would be no question as to the source of the water. I'm wondering if you think that can still be accomplished to rule out groundwater. I understand your argument, and am not disagreeing; however, it concerns me that there is standing "effluent" at the end of two of the trenches now when there are 2 people living in a house for a system that was sized for use by 10 people. One failure has already been experienced on this property. I look forward to meeting you at the Towne residence on Friday. Thanks, Carla Ostberg, MPH, REHS Environmental Health Program Supervisor Pitkin County Environmental Health and Natural Resources 970-920-5438 From: Robert Wright [mailto:rwright@cowc.info] Sent: Monday, June 01, 2009 3:17 PM To: Carla Ostberg Cc: 'Katie Carney' Subject: RE: C550, Towne OWS Repair Carla, I will be up there in the late afternoon of Friday, probably between 3:00PM and 3:30PM to observe the liquid in the near monitoring pipes. I would think that having the two of us there to look at all aspects of the situation, with regard to the interceptor trench, chambered drainfield and surface water might clarify much of what we have been discussing over the phone and in e-mails. I am attaching our reply to your letter to the Townes, which expresses our opinion that there is not a groundwater problem at the field, but a poor soil and ponding effluent situation. Thanks very much for working with us all on this system; I feel we are near to closure. CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 From: Carla Ostberg [mailto:Carla.Ostberg@co.pitkin.co.us] Sent: Monday, June 01, 2009 3:04 PM To: Robert Wright Cc: Katie Carney; Ed Church Subject: RE: C550, Towne OWS Repair Thanks Bob, I appreciate your attention to this. Jered did call me and give me an update this morning. The soil there is horrible — no argument there! I will be around on Friday if you'd like me to come up to the site. Just let me know. Thanks again - Carla Ostberg, MPH, REHS Environmental Health Program Supervisor Pitkin County Environmental Health and Natural Resources 970-920-5438 From: Robert Wright [mailto: rwright@cowc.info] Sent: Monday, June 01, 2009 11:13 AM To: Carla Ostberg Cc: 'Katie Carney'; 'Ed Church' Subject: C550, Towne OWS Repair Carla, Just an e-mail to keep you in the loop regarding the repairs to the OWTS. We received a call from Mrs. Towne, asking about completion, and your letter. We explained that we have sent Jered an e-mail outlining the tasks that are outstanding to complete repairs to the system, and requesting a schedule. We called Jered right after talking with Mrs. Towne, and contacted him at the Towne site. Jered explained that he has spoken with Mrs. Towne, although she did not recall that, and has discussed the irrigation situation with the landscaping contractor. Jered is at the site now, spreading topsoil. Jered indicates that he has exposed the mon pipes at the near end of the drainfield, and that trenches 3 & 4 are filled with effluent, as well as the 2 -inch mon pipe I installed over the weekend of the 18" of May. There is no water flowing out of the interceptor trench that has been installed around the drainfield, above it, to cut off groundwater near the drainfield. This is a clear indication that the fluid observed in the trenches is effluent, and not groundwater. The interceptor trench extends to about 6 -feet below the bottom of the drainfield, so will cut off groundwater moving through the soil from higher elevations, as well as provide a cone of depression to the bottom of the interceptor pipe, that will lower any potential groundwater below the drainfield. When I installed the 2 -inch mon pipe, I encountered a fat clay, that was very tight and :sticky. These types of clays have a very low percolation rate, which is why we are seeing ponding in the lower trenches, and not the upper two. We believe that the chambers are doing their job; that is to hold the effluent, without allowing it to surface, while it is being infiltrated into the slow percolating soil. We will be at the Towne property on Friday. Mrs. Towne indicated that they will not be home on Thursday and Friday, so if we arrive late in the day, we can observe the level of ponding after two days of rest. We will report to you after we have made that site visit Thanks very much, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 40 Carla Ostberg From: Carla Ostberg Sent: Tuesday, June 02, 2009 10:56 AM To: 'Robert Wright' Cc: 'Katie Carney'; Rose Ann Sullivan Subject: RE: C550, Towne OWS Repair Thanks Bob, I will meet you up at the Towne residence on Friday afternoon. Call me when you are in the area. After my inspection on May 8, 1 had requested we find a way to stop flow to the area of the new trenches. Had that been done, there would be no question as to the source of the water. I'm wondering if you think that can still be accomplished to rule out groundwater. I understand your argument, and am not disagreeing; however, it concerns me that there is standing "effluent" at the end of two of the trenches now when there are 2 people living in a house for a system that was sized for use by 10 people. One failure has already been experienced on this property. I look forward to meeting you at the Towne residence on Friday. Thanks, Carla Ostberg, MPH, REHS Environmental Health Program Supervisor Pitkin County Environmental Health and Natural Resources 970-920-5438 From: Robert Wright [mailto:rwright@cowc.info] Sent: Monday, June 01, 2009 3:17 PM To: Carla Ostberg Cc: 'Katie Carney' Subject: RE: C550, Towne OWS Repair Carla, I will be up there in the late afternoon of Friday, probably between 3:OOPM and 3:30PM to observe the liquid in the near monitoring pipes. I would think that having the two of us there to look at all aspects of the situation, with regard to the interceptor trench, chambered drainfield and surface water might clarify much of what we have been discussing over the phone and in e-mails. I am attaching our reply to your letter to the Townes, which expresses our opinion that there is not a groundwater problem at the field, but a poor soil and ponding effluent situation. Thanks very much for working with us all on this system; I feel we are near to closure. CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 From: Carla Ostberg[maiIto:Carla.Ostberg@co.pitkin.co.us] Sent: Monday, June 01, 2009 3:04 PM To: Robert Wright Cc: Katie Carney; Ed Church Subject: RE: C550, Towne OWS Repair 0 0 Thanks Bob, I appreciate your attention to this. Jered did call me and give me an update this morning. The soil there is horrible — no argument there! I will be around on Friday if you'd like me to come up to the site. Just let me know. Thanks again - Carla Ostberg, MPH, REHS Environmental Health Program Supervisor Pitkin County Environmental Health and Natural Resources 970-920-5438 From: Robert Wright [mailto:rwright@cowc.info] Sent: Monday, June 01, 2009 11:13 AM To: Carla Ostberg Cc: 'Katie Carney'; 'Ed Church' Subject: C550, Towne OWS Repair Carla, Just an e-mail to keep you in the loop regarding the repairs to the OWTS We received a call from Mrs. Towne, asking about completion, and your letter. We explained that we have sent Jered an e-mail outlining the tasks that are outstanding to complete repairs to the system, and requesting a schedule. We called Jered right after talking with Mrs. Towne, and contacted him at the Towne site. Jered explained that he has spoken with Mrs. Towne, although she did not recall that, and has discussed the irrigation situation with the landscaping contractor. Jered is at the site now, spreading topsoil. Jered indicates that he has exposed the mon pipes at the near end of the drainfield, and that trenches 3 & 4 are filled with effluent, as well as the 2 -inch mon pipe I installed over the weekend of the 18th of May. There is no water flowing out of the interceptor trench that has been installed around the drainfield, above it, to cut off groundwater near the drainfield. This is a clear indication that the fluid observed in the trenches is effluent, and not groundwater. The interceptor trench extends to about 6 -feet below the bottom of the drainfield, so will cut off groundwater moving through the soil from higher elevations, as well as provide a cone of depression to the bottom of the interceptor pipe, that will lower any potential groundwater below the drainfield. When I installed the 2 -inch mon pipe, I encountered a fat clay, that was very tight and sticky. These types of clays have a very low percolation rate, which is why we are seeing ponding in the lower trenches, and not the upper two. We believe that the chambers are doing their job; that is to hold the effluent, without allowing it to surface, while it is being infiltrated into the slow percolating soil. We will be at the Towne property on Friday. Mrs. Towne indicated that they will not be home on Thursday and Friday, so if we arrive late in the day, we can observe the level of ponding after two days of rest. We will report to you after we have made that site visit. Thanks very much, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal n CHURCH OWC, LLC Onsite Wastewater Consultants June 1, 2009 Pitkin County Department of Environmental Health & Natural Resources ATTN: Ms. Carla Ostberg, MPH, REHS 0405 Castle Creek Road, Suite 10 Aspen, CO 81611 Subject: Individual Sewage Disposal System (ISDS) Permit 07080 and Onsite Wastewater Treatment System (OWTS) Construction Permit 09009 567 N. Starwood Drive Pitkin County, Colorado Job No. C550 Carla, CHURCH Onsite Wastewater Consultants, LLC (COWC) has received your May 28, 2009 letter to the Townes regarding the repairs to the existing OWTS. In your letter you indicate that efforts to divert water form the chambered drainfield "...appear to be ineffective." At this point in time, we have no evidence that the fluid observed in the chambers is groundwater. It is our observation that this liquid in the monitoring pipes of trenches 3 & 4 is effluent from the OWTS, that is ponding. The interceptor trench was installed a few weeks ago to a depth of about six -feet below the bottom of the chambered drainfield. At last observation, the discharge pipe of the interceptor trench was not flowing water, which indicates that it is not collecting groundwater to discharge. If there was a high groundwater condition below the drainfield, COWC would expect to see a steady flow of water discharging from the interceptor trench to the irrigation ditch. To date, we have not observed flow from the installed interceptor trench discharge pipe. It is our opinion that the situation with ponding in the chambered trenches arises from the soil type underlying the drainfield, and not from high groundwater. On May 19, 2009 COWC augered a 2 -inch monitoring pipe into the soil down slope of the lower trench. Our observation of the soil at that time indicates that at least the lower the drainfield trenches are underlain by a fat clay that exhibits tight, plastic characteristics, and will have low percolation rates. The ponding of effluent, within the trench chambers, is in conformance with the chamber design and manufacturer's literature, and is not seen, at this time as a problem, or out of compliance with current Pitkin County OWTS regulations. If there are questions, please feel free to contact us at your co �p,DO t Sincerely, �4�o4t vaiiu CHURCH Onsite Wastewater Consultants, LLC I Robert W. Wright, PE Principal cc: the Townes, 567 N. Starwood Drive, Aspen, CO 81611 9590 West 14th Avenue Ste. 100, Lakewood, CO 80215 Voice 720-898-3434 FAX: 720-898-3455 Carla Ostberg From: Robert Wright [rwright@cowc.info] Sent: Monday, June 01, 2009 11:13 AM To: Carla Ostberg Cc: 'Katie Carney'; 'Ed Church' Subject: C550, Towne OWS Repair Carla, Just an e-mail to keep you in the loop regarding the repairs to the OWTS. We received a call from Mrs. Towne, asking about completion, and your letter. We explained that we have sent Jered an e-mail outlining the tasks that are outstanding to complete repairs to the system, and requesting a schedule. We called Jered right after talking with Mrs. Towne, and contacted him at the Towne site. Jered explained that he has spoken with Mrs. Towne, although she did not recall that, and has discussed the irrigation situation with the landscaping contractor. Jered is at the site now, spreading topsoil. Jered indicates that he has exposed the mon pipes at the near end of the drainfield, and that trenches 3 & 4 are filled with effluent, as well as the 2 -inch mon pipe I installed over the weekend of the 18th of May. There is no water flowing out of the interceptor trench that has been installed around the drainfield, above it, to cut off groundwater near the drainfield. This is a clear indication that the fluid observed in the trenches is effluent, and not groundwater. The interceptor trench extends to about 6 -feet below the bottom of the drainfield, so will cut off groundwater moving through the soil from higher elevations, as well as provide a cone of depression to the bottom of the interceptor pipe, that will lower any potential groundwater below the drainfield. When I installed the 2 -inch mon pipe, I encountered a fat clay, that was very tight and sticky. These types of clays have a very low percolation rate, which is why we are seeing ponding in the lower trenches, and not the upper two. We believe that the chambers are doing their job; that is to hold the effluent, without allowing it to surface, while it is being infiltrated into the slow percolating soil. We will be at the Towne property on Friday. Mrs. Towne indicated that they will not be home on Thursday and Friday, so if we arrive late in the day, we can observe the level of ponding after two days of rest. We will report to you after we have made that site visit. Thanks very much, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 Carla Ostberg From: Robert Wright [rwright@cowc.info] Sent: Friday, May 29, 2009 12:09 PM To: jeredboyden@comcast.net Cc: Carla Ostberg; 'Katie Carney' Subject: C550, Towne OWS Jered, I received a call from Carla at Pitkin County Health this morning concerning the Towne system repair. She indicated that she visited the site last Wednesday, and that there was standing water in the monitoring pipes for the lower two trenches. She also investigated water running in the road ditch, above, and from driveways across N Starwood. She is concerned that offsite water may be infiltrating onto the Towne Property. I asked Carla if she looked in the mon pipes on the near end of the chambers, and she said they were not evident; I thought we discussed that and that you were going to raise those so we can access them. Right now, the main concerns to finish this project and allow all of us to go home, are as follows 1. Expose the mon pipes at the near end of the chambers so the chamber ponding can be monitored. 2. Place the topsoil and seed. 3. Meet with the Townes and their irrigation contractor and determine what the problem(s) are and how they should be fixed, and who will do that. With the information COWC has now, we believe that the ponding in rows 3 & 4 of the chambered trenches is due to the 11 chambers not being level, and the effluent flowing to the low end of the trench, which is where the two chambers were installed lower than the rest. That may be why we see a lot of ponding in those two chambers in those two rows. Having the mon pipes at the near ends of the trenches available for observation will verify whether this assumption is true or not. COWC is acting as the organizer for the repairs at the Towne site, but is not doing the work. We have no capacity to schedule the work, perform the work or regulate the quality of the work while it is being done. COWC understands that Professional Excavating has spent a great deal of time and effort in repairing the OWS, and that you are now looking at how much this will cost in the end. At this point, COWC sees that we are very close to completing the repairs and being able to leave the site and have Pitkin County sign off on it. Our opinion is that if we leave before the job is completed, it will only cost more down the road. The Towne's have expressed their anxiety over the lot being returned to a completed state, with topsoil and seed and both a working OWS and working sprinkler system. They have asked Carla whether they should get an attorney involved I am sure you know, as well as we do that if an attorney gets involved, it will simply cost more money than it has to, and that the end product will be no better than what we are trying to accomplish. To ensure that Pitkin County Health and the Towne's are informed and satisfied, COWC is asking you to send us a schedule for completion of the three tasks listed above by June 3, so that we can tell both Pitkin and the Towne's when we believe the repair work will be completed and they can expect an end to the construction on their lot. Please forward a schedule to us by e-mail or fax so we can pass that along. If there are questions or comments, please feel free to contact us at your convenience Thanks very much, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 U81 Pitkin County May 28, 2009 Leslie and Ethel Towne 567 N. Starwood Drive Aspen, CO 81611 Environmental Health and Natural Re,Courcm Re: Individual Sewage Disposal System (ISDS) Permit 07080 and Onsite Wastewater Treatment System (OWTS) Construction Permit 09009 Dear Mr. and Ms. Towne, The OWTS serving your residence was found to be failing in 2007, and work has been ongoing to replace that system with one that meets current Pitkin County OWTS regulations. Church OWC, LLC designed a system replacement that was approved and permitted (ISDS Permit 07080) by this Department in September of 2007. Church OWC, LLC oversaw exploratory efforts during the installation of this system in an effort to identify the cause of the prior failure. Finding no evidence of groundwater at the time of year this work was conducted, installation of the replacement system proceeded; however, it was subsequently determined that the new OWTS installation was not in compliance with Church OWC, LLC's design or the conditions of ISDS Permit 07080. OWTS Construction Permit 09009 was issued by this Department on April 13, 2009 to address the improper installation of the system approved by ISDS Permit 07080. On May 8, 2009, this Department was called by Professional Excavating to inspect the system installation associated with OWTS Construction Permit 09009. During the inspection, groundwater was observed in the area of the absorption trenches. In an effort to divert the groundwater away from the absorption area, Professional Excavating installed an interceptor drain according to Church OWC, LLC specifications dated April 21, 2009. Unfortunately, efforts to divert the water appear to have been ineffective. Numerous site visits to monitor groundwater levels in the area of the newly constructed absorption trenches have occurred since May 8, 2009 by Professional Excavating, Church OWC, LLC, and this Department. Standing water was observed in the inspection ports of the two lower trenches during a recent visit by this Department on May 27, 2009. It is likely the appearance of groundwater is caused by high runoff and will dissipate as the summer proceeds; however, the presence of groundwater at any time of year within four feet of the absorption area can lead to contamination of groundwater as well as possible back-ups and other system malfunctions. Solutions may include finding the source of the groundwater and successfully diverting it away from the absorption area, or creating four feet of suitable soil between the absorption area and high groundwater. It appears there is a substantial amount of water draining from the two properties uphill from your property. The drainage from these properties appears to converge on the 0405 Castle Creek Road, Suite 10 Aspen, Colorado 81611 Phone: (970) 920-5070 Fax: (970) 920-5077 www.aspenpitkin.com/ehnr Pitkin County Environmental Health and Naturat Resources uphill side of North Starwood Drive, and is possibly being diverted under North Starwood Drive toward your property. This Department will be unable to issue final approval of OWTS Construction Permit 09009 until this issue is resolved. Your prompt attention to this matter is, and has been, greatly appreciated. Please don't hesitate to call if you have any questions. Sincerely, (All Carla Ostberg, MPH, REHS Environmental Health Program Supervisor 970-920-5438 cc: Robert Wright, Principal, Church OWC, LLC Jered Boyden, Field Supervisor, Professional Excavating 0405 Castle Creek Road, Suite 10 Aspen, Colorado 81611 Phone: (970) 920-5070 Fax: (970) 920-5077 www.aspenpitkin.com/ehnr P �b —Cv( J i p. r P �b —Cv( Carla Ostberg From: Robert Wright [rwright@cowc.info] Sent: Wednesday, May 20, 2009 8:49 AM To: Carla Ostberg Subject: C550, Towne OWS Carla, As we discussed last week, I did visit the Towne residence this weekend, on Sunday. I looked over the site, observed the distal monitoring tubes for the 4 -chambered trenches and checked for mon pipes on the near end and for the ADV. I could not find the ADV box, and there were no near mon pipes visible. One of my goals was to observe the action of the ADV while someone activated the pump, but not finding that, we could not make that check. The Townes are anxious to get topsoil and seed on the lot, and I promised them I would contact Jered and see when that would happen. While I was on the site, I augered in a 2" mon pipe just below the lower trench to be able to monitor groundwater. We found no groundwater to about 40", the depth of the pipe. Jered returned my call yesterday, and indicated that he did install mon pipes in the near ends of each trench, but that one of his workers must have covered them. He also indicated that the ADV was in the bushes, and was not buried. Jered will be bringing in topsoil and see this week to finish out the project. I will call the Townes and let them know. I also checked the discharge on the interceptor trench, and noted that it was not flowing, which points to no groundwater to about 6 -feet below the bottom of the chambered trenches. When we have the near mon pipes exposed, we will be better able to determine the extent of ponding in trenches 3 & 4. Jered has indicated that he has contacted the local supplier to obtain new working parts inside, and replace them. I will keep you apprised of the progress. Thanks, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 Carla Ostberg From: Robert Wright [rwright@cowc.info] Sent: Friday, May 22, 2009 2:36 PM To: Carla Ostberg Subject: RE: C550, Towne OWS Carla, Thanks for the reply. Part of the reason for my trip out to Towne's last weekend was to look in the ports on the near end of the chambers that were supposed to have been installed the Tuesday before the trip. I will stay in touch with Jered and see what he finds. My gut feeling is that we will not see effluent ponding in the rest of the trench. I think the trenches were cut in with a bit of a lope toward the far end, and that all the ponding is accumulating in the last two chambers, that were installed lower than the first 11 -trenches; we'll see. Once we hear back from Jered, we can determine what our next step should be. Thanks, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 From: Carla Ostberg [mailto:Carla.Ostberg@co.pitkin.co.us] Sent: Friday, May 22, 2009 2:11 PM To: Robert Wright Subject: RE: C550, Towne OWS Thanks Bob, I just spoke with Jered this afternoon and he is still seeing water in #3 and #4. He is going to install additional inspection ports on the front end of the trenches so we can get a better feel for what's going on. He will check them again next week, but if water continues to be present, I really think we need to look at our alternatives. It would not be appropriate for this to happen every year at high run off time (because we know it will probably stop in a few weeks). Let me know your thoughts. Thanks, Carla Ostberg, MPH, REHS Environmental Health Program Supervisor Pitkin County Environmental Health and Natural Resources 970-920-5438 From: Robert Wright [mailto: rwright@cowc. info] Sent: Wednesday, May 20, 2009 8:49 AM To: Carla Ostberg Subject: C550, Towne OWS Carla, As we discussed last week, I did visit the Towne residence this weekend, on Sunday. r] I looked over the site, observed the distal monitoring tubes for the 4 -chambered trenches and checked for mon pipes on the near end and for the ADV. I could not find the ADV box, and there were no near mon pipes visible. One of my goals was to observe the action of the ADV while someone activated the pump, but not finding that, we could not make that check. The Townes are anxious to get topsoil and seed on the lot, and I promised them I would contact Jered and see when that would happen. While I was on the site, I augered in a 2" mon pipe just below the lower trench to be able to monitor groundwater. We found no groundwater to about 40", the depth of the pipe. Jered returned my call yesterday, and indicated that he did install mon pipes in the near ends of each trench, but that one of his workers must have covered them. He also indicated that the ADV was in the bushes, and was not buried. Jered will be bringing in topsoil and see this week to finish out the project. I will call the Townes and let them know. I also checked the discharge on the interceptor trench, and noted that it was not flowing, which points to no groundwater to about 6 -feet below the bottom of the chambered trenches. When we have the near mon pipes exposed, we will be better able to determine the extent of ponding in trenches 3 & 4. Jered has indicated that he has contacted the local supplier to obtain new working parts inside, and replace them. I will keep you apprised of the progress. Thanks, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 J Carla Ostberg From: Robert Wright [rwright@cowc.info] Sent: Wednesday, May 13, 2009 1:48 PM To: Carla Ostberg; 'Ed Church' Cc: 'Katie Carney' Subject: C550 Townes OWS Carla, M I spoke with Jered just now regarding the chambered portion of the drainfield. He indicated that the monitoring pipes are installed on the near end of the chambered field, and that there is still some ponding in rows 3 & 4, but not in 1 & 2. It appears the ponding is going down. He is scheduled to go back out to the site next Thursday and will check the chambers at that time. I will be at the site on Saturday, and will look in all mon pipes and record the level of ponding, as well as auger a mon pipe in next to the drainfield so we can monitor the level of groundwater, if it is there, next to the field. The interceptor trench is 11 -feet deep in places, so should be lowering any groundwater to route it to the irrigation ditch. I will report what I find when we get back from Aspen. Thanks, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 A n -- Carla Carla Ostberg From: Roger Shafer [rshafer@scgenterprises.com] Sent: Monday, May 11, 2009 8:29 AM To: Robert Wright Cc: 'Ed Church'; 'Katie Carney'; Carla Ostberg Subject: Re: C550, Towne OWS Attachments: Automatic Distributing Valve Assemblies. pdf :.. If the Infiltrator trenches are not pressurized, then you could just replace the ADV with a manifold and manual valves like the typical low pressure drip systems have. Otherwise, going to a 2 -outlet valve will probably be the best answer. To go from a 4 -outlet to a 2 -outlet valve, we need to replace the cam (item #5 in Figure 1 of the attached document). They are very easy to replace. The cams are $15.12 a piece. Roger ----- Original Message ----- From: Robert Wright To: 'Roger Shafer' Cc: 'Ed Church' ; 'Katie Carnev' ; 'Carla Ostberg' Sent: Sunday, May 10, 2009 12:46 PM Subject: C550, Towne OWS Roger, We have a 4 -outlet ADV at the Towne residence in Starwood. The system doses to two different drainfields; a low pressure drip field and a chambered trench drainfield. We have a problem with one of the chambered trenches, and have also just installed a gravel interceptor trench to lower the water table above the fields. We are looking at ways to cut off flow to the trenches, and just use the low pressure drip field below the chambered field. Will replacing the selector disk in the ADV from a 4 -outlet to a 2 -outlet, work to direct all flow to the LPD field? How is the 2 -outlet selector plate configured? How much has to be replaced, and how much is a new selector system? Thanks very much, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 This article may describe design cr1'lllFia that was in effect at the time the article was Qten. FOR CURRENT DESIGN CRITERIA, call Orenco Systems, Inc. at 1-800-348-9843. Orenco Automatic Distributing cs� Valve Assemblies Orenco Systems' Incorporated 1-800.348-9843 For Wastewater Effluent Systems Introduction Orenco's automatic distributing valve assemblies, pressurized with small high -head effluent pumps, are useful for distributing effluent to multiple zones. These zones can be segments of sand filter manifolds, drainfields, or other effluent distribution systems. Distributing valve assemblies can substantially simplify the design and installation of a distribution sys- tem and reduce installation costs. This is particularly true where a distributing valve assem- bly is used instead of multiple pumps and/or electrically operated valves. Additionally, a reduction in long term operation and maintenance costs is realized due to a reduced size and/or number of pumps. More even distribution can be achieved on sloping sites by zoning laterals at equal elevations. This eliminates drainback to lower lines and the unequal distrib- ution of effluent that occurs at the beginning of a cycle. Valve Operation The valve itself has only a few moving parts, requires no electricity, and alternates automati- cally each cycle. Refer to Figure 1 for the following valve operation description. The flow of the incoming effluent forces the rubber flap disk O to seat against the valve bottom 4. The opening © in the rubber flap disk aligns with an opening in the valve bottom to allow flow to only one valve outlet. The stem O houses a stainless steel spring which pushes the rubber flap disk away from the valve bottom after the flow of effluent stops. The stem acts as a cam follower and rotates the rubber flap disk as the stem is raised and lowered through the cam 4. The force from the flow of effluent pushes the stem down through the cam and the stainless steel spring pushes the stem back up through the cam when the flow of effluent stops. Each linear motion of the stem allows the rubber flap disk to rotate half the distance necessary to reach the next outlet. When there is no flow, the rubber flap disk is in the "up" position and is not seated against the valve bottom. Figure 1: 6000 Series Valve NTP -VA -1 Rev. U © 11/03 Orenco Systems®. Inc. Page 1 of 6 • • Figure 2: Orenco Distributing Valve Assembly (6000 Series Valve) The Distributing Valve Assembly The Orenco Automatic Distributing Valve Assembly combines the distributing valve itself and sever- al other components to give a complete preassembled unit that is easy to install, monitor, and main- tain. Figure 2 shows a complete assembly. Because distributing valves with several outlets can be difficult to line up and glue together in the field, the discharge lines in the assemblies are glued in place at Orenco. The unions (1) allow removal and maintenance of the valve. The clear PVC pipe sections (2) give a visual check of which discharge line is being pressurized. The inlet ball valve (3) allows a quick, simple method to test for proper valve cycling. The ball valve also stops the flow of effluent in case the pump is activated unexpectedly during maintenance or inspection. Check valves may be necessary on the discharge lines. Use of check valves is discussed in the valve positioning section. Valve Assembly Hydraulics Liquid flowing through the valve assembly must pass through fairly small openings and make several changes in direction. Because of this, headlosses through the valve assembly are fairly high. Table 1 gives the headloss equations for several different assemblies and Figure 3 shows the graphical repre- sentations of these equations. Orenco recommends that high -head turbine pumps be used to pressur- ize the valve assemblies to ensure enough head is available for proper system operation. High -head turbine pumps are also recommended because the use of a distributing valve usually requires more frequent pump cycling. The high -head turbine pumps are designed for high cycling systems and will outlast conventional effluent pumps by a factor of 10 or more in a high cycling mode. Furthermore, the high -head turbine pump intake is 12 inches or more above the bottom of the pump and tends to prevent any settled solids from being pumped into the distribution valve and obstructing its opera- tion. A minimum flow rate through the distributing valve is required to ensure proper seating of the rubber flap disk. Minimum flow rates for the various models are given in Table 1. NTP -VA -1 Rev. 12, ©11/03 Orenco Systems®, Inc. Page 2 of 6 0 C Table 1. Automatic Distributing Valve Assembly Headloss Equations Model Series EZaton Operating Range (gpml V4400A HL = 0.085 x Q1.45 10-40 V4600A HL = 0.085 x Q1.58 10-25 V6400A HL = 0.0045 x Q2 + 3.5 x (1- e -0-06Q) 15-70 V6600A HL = 0.0049 x Q2 + 5.5 x (1- e-0- IQ) 15-70 35 a 30 E N 25 L 20 O 15 N 10 U) O J 5 co O 0 V6600A 000, V4400A V6400A V4600 1,0.00. = 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 Flow (gpm) Figure 3: Automatic distributing valve assembly headloss curves The Pumping System Although the distributing valve was designed for the irrigation industry, it has started to gain fairly wide acceptance in the effluent pumping industry. However, because of the mechanical movements of the valve, it is necessary to take steps to prevent solids from reaching the distributing valve that may impede the operation of the valve. Orenco Biotube® Pump Vaults — when properly sized and installed — provide the necessary protection to prevent valve malfunction. The Biotube® pump vault accepts effluent only from the clear zone between a tank's scum and sludge layers and then filters this effluent through a very large surface area screen cartridge. Without this protection in effluent systems, the valve has very little chance of reliable long-term operation. NTP -VA -1 Rev. 12, © 11/03 Orenco Systems'. Inc. Page 3 of 6 • ! .4 Valve Positioning The physical position of the valve in relation to the pump and the discharge point is very important for proper valve operation. The most reliable operation occurs when the valve is placed at the high point in the system and as close to the pump as possible. The transport line between the pump and valve should be kept full if possible. If the line is empty at the beginning of each cycle, pockets of air during filling can cause random rotation of the valve. The valve is particularly vulnerable to this erratic rotation with empty lines that are long and not laid at a constant grade. An ideal valve loca- tion is shown in Figure 4. If the final discharge point is more than about 2 feet above the valve and the system does not drain back into the dosing tank, check valves should be installed on the lines immediately following the valve and a pressure release hole or line should be installed just prior to the valve. This pressure release hole or line can go into a return line to the dosing tank or to a "minidrainfield" near the valve. In order for the valve to rotate reliably, no more than about 2 feet of head should remain against the valve to allow the rubber flap disk to return to its up position. In many cases, it may take from one minute to several minutes for the pressure in the valve to be lowered enough for proper rotation to occur. Special care should be taken when installing systems controlled by programmable timers to ensure cycling does not occur too rapidly. Figure 5 illustrates a valve assembly using check valves. Pumping downhill to the valve should be avoided unless the transport line is very short and the ele- vation between the discharge line out of the tank and the valve is less than about 2 feet. If the valve is located many feet below the dosing tank, random cycling may occur while the transport line drains through the valve at the end of the cycle. A pressure sustaining valve located just before the distrib- uting valve may overcome this problem in some instances. Transport Line Dosing Tank Figure 4: Ideal valve location Distributing Valve Assembly Discharge Laterals NTP -VA -1 Rev. 12, ®11/03 Orenco Systems', Inc. Page 4 of 6 System Startup Refer to the Hydrotek Valve booklet that is provided with the distributing valve assembly for the sequencing of the valve outlets. The transport line should always be flushed with clean water before installing the valve. Any sand, gravel, or other foreign objects that may have been in the pipe during installation can easily become lodged in the distributing valve, causing malfunction. With the pump running, alternately close and open the ball valve on the distributing valve assembly to check proper rotation of the valve. (Note: If check valves are used on the lines after the distribut- ing valve, the pump may need to be turned on and off to allow the pressure to be released from the valve.) If visual operation of which zone is operating is not possible, watch the clear pipe on each line for indication of which zone is operating. Figure 5: Valve assembly below final discharge point Maintenance Annually check for proper operation by following procedures listed in the Hydrotek Valve booklet and system startup procedures listed above. Troubleshooting 1. PROBLEM: Valve does not change or cycle to next zone or outlet CAUSE: The stem and disk assembly is not rotating when water flow is turned off and then back on. SOLUTION 1: Ensure that there is no debris inside the cam. Clean and carefully reinstall the cam. SOLUTION 2: If fewer than the maximum number of outlets are being used, check the installation of the cam. Ensure that the stem and disk assembly is not being held down by an improperly installed cam. Refer to the cam replacement instructions. NTP -VA -1 Rev. 1.2, ©11/03 Orenco Systems*, Inc. Page 5 of 6 SOLUTION 3: Remove the valve top and check for proper movement of stem and disk assembly. Check for and remove any debris or foreign objects that may jam or retard the movement of the disk. SOLUTION 4: Check for freedom of movement of stem and disk assembly up and down over the center pin in bottom of valve. Scale deposits may build up on the pin and hold stem and disk assembly down. Clean pin and again check for freedom of movement. SOLUTION 5: Be sure that all operating outlets are not capped and that the flow to operating zones is not restricted in any manner. This would cause pressure to build up in the valve and lock the stem and disk assembly in the down position. SOLUTION 6: The backflow of water from uphill lines may be preventing the valve from cycling properly. This can happen when the valve is placed too far below an elevated line. If the valve cannot be placed close to the high point of the system, a check valve should be installed near the valve in the outlet line that runs uphill from the valve and a drain line installed just prior to the valve to relieve the pressure. 2. PROBLEM: Water comes out of all the valve outlets CAUSE: Stem and disk assembly not seating properly on valve outlet. SOLUTION 1: Check for sufficient water flow. A minimum flow rate is required to properly seat the disk as shown in Table 1. SOLUTION 2: Remove the valve top and check the inside walls to ensure that nothing is interfering with the up and down movement of the stem and disk assembly inside the valve. SOLUTION 3: Make sure that the operating outlets are not capped and that the flow to the operat- ing zones are not restricted in any manner. 3. PROBLEM: Valve skips outlets or zones CAUSE: Pumping into an empty transport line — especially downhill — may cause the valve to skip outlets from pockets of air allowing the rubber flap disk to raise during a cycle. SOLUTION 1: Keep the transport line full. SOLUTION 2: If the line must remain empty between cycles, use a larger diameter transport line laid at a constant grade to prevent air pockets from forming. CAUSE: The stem and disk assembly is being advanced past the desired outlet. SOLUTION 1: Ensure that the correct cam for the desired number of zones is installed and that the outlet lines are installed to the correct outlet ports of the valve as indicated by the zone numbers on the top of the cam. NTP -VA -1 Rev. 12, © 11/03 Orenco Systems®, Inc. Page 6 of 6 r - Distributing Valves Applications Automatic Distributing Valve Assemblies are used to pressurize multiple zone distribution systems including textile filters, sand filters and drainfields. clf Bottom View Specifications Materials of Construction Side View Submittal Data Sheet General Orenco Systems Ircorporated 1-8f-348-9843 Orenco's Automatic Distributing Valve Assemblies are mechanically operated and sequentially redirect the pump's flow to multiple zones or cells in a distribution field. Valve actuation is accomplished by a combination of pressure and flow. Automatic Distributing Valve Assemblies allow the use of smaller horsepower pumps on large sand filters and drainfields. For example, a large community drainfield requiring 300 gpm can use a six -line Valve Assembly to reduce the pump flow rate requirement to only 50 gpm. Orenco only warrants Automatic Distributing Valves when used in conjunction with High -Head Effluent Pumps with Biotube" Pump Vaults to provide pressure and flow requirements, and to prevent debris from fouling valve operation. An inlet ball valve and a section of clear pipe and union for each outlet are provided for a complete assembly that is easy to maintain and monitor. Ideal valve location is at the high point in the system. Refer to Automatic Distributing Valve Assemblies (NTP -VA -1) for more information. Standard Models V4402A, V4403A, V4404A, V4605A, V4606A, V6402A, V6403A, V6404A, V6605A, V6606A. Nomenclature 111100 TTT,-dicates assembly Number of active outlets Model series: 44 = 4400 series (2-4 outlets) 46 = 4600 series (5-6 outlets) 64 = 6400 series (2-4 outlets) 66 = 6600 series (5-6 outlets) Distributing valve All Fittings: Sch. 40 PVC per ASTM specification Unions: Sch. 80 PVC per ASTM specification Ball Valve: Sch. 40 PVC per ASTM specification Clear Pipe: Sch. 40 PVC per ASTM specification V4XXX Distributing Valves: High-strength noncorrosive ABS polymer and stainless steel V6XXX Distributing Valves: High-strength noncorrosive ABS polymer, stainless steel, and die cast metal NSU -SF -VA -1 Rev. 3.0, © 4/03 Page 1 of 2 C- � Distributing Valves (continued) 35- �•30 V6600A E y 25 —00 V7 Cm Q 20 7A4 V6400A 7 15 V4600A ai 10 0 R 5 as�� 0 0 5 10 15 20 25 30 35 40 46 50 55 60 65 70 Flow (gpm) Model Inlet Size (in.) Outlets Size (in.) Flow range (gpm) Max Head (it) Min. Enclosure V4402A 1.25 1.25 10-40 170 VB1217 V4403A 1.25 1.25 10-40 170 VB1217 V4404A 1.25 1.25 10-40 170 VB1217 V4605A 1.25 1.25 10-25 170 RR2418 V4606A 1.25 1.25 10-25 170 RR2418 V6402A 1.5 1.5 15-100 345 RR2418 V6403A 1.5 1.5 15-100 345 RR2418 V6404A 1.5 1.5 15-100 345 RR2418 V6605A 1.5 1.5 15-100 345 RR2418 V6606A 1.5 1.5 15-100 345 RR2418 NSU -SF -VA -1 Rev. 3.0, © 4/03 Page 2 of 2 _It Carla Ostberg From: Robert Wright [rwright@cowc.info] Sent: Friday, May 08, 2009 1:33 PM To: Carla Ostberg Subject: RE: C550 Townes I just talked to Ethel at 1320. 1 explained why we were working in her yard, and that the cost of the work was being split between professional Excavating and COWC. She seemed satisfied. I explained that our goal is to ensure that the system works properly for her and the new owners. CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 From: Carla Ostberg [mailto:Carla.Ostberg@co.pitkin.co.us] Sent: Friday, May 08, 2009 1:17 PM To: Robert Wright Subject: RE: C550 Townes OK — great. Keep me posted! Carla Ostberg, MPH, REHS Environmental Health Program Supervisor Pitkin County Environmental Health and Natural Resources 970-920-5438 From: Robert Wright [mailto: rwright@cowc. info] Sent: Friday, May 08, 2009 12:44 PM To: Carla Ostberg Subject: C550 Townes Carla, I am researching the Towne design, and will let you know what I find about revising the dosing of the system. I placed a call to the Townes right after we talked, but no one picked up. I left a message asking that they call me, and I will explain the process we have been through and what the anticipated results are, and why the interceptor drain is being installed now. Thanks, CHURCH Onsite Wastewater Consultants, LLC Bob Wright, PE Principal Phone 720.898.3434 Cell 720.272.6469 ��r O r r. TO DITCHE k SCALE 1" = 20' INTERCEPTOR TRENCH SHALL BE FIELD FIT TO THE SITE TO PREVENT REMOVAL OF TREES. TRENCH SHALL NOT BE CLOSER THAN 6—FEET FROM EDGZ OF DRAINFIELD. END PIPE TREATMENT TRENCH SECTION 1 4 i FINISHED MIN 4" GRADE I— PVC INTERCEPTOR DRAIN NOTES: 1. INSTALL 4" PVC PERF PIPE 0% GRADE, EXTEND LEGS OF INTERCEPTOR TRENCH PIPE TO NORTHWEST TO DAYLIGHT. Onsite Wastewater Engineering -Geological Engineering LOCATION OF INTERCEPTOR TRENCH P.O. Box 527, Wheat Ridge, Colorado 80034-0527 Voice: (720) 898-3434 Fax: (720) 898-3455 JOB NO. C550 DATE: 04/21/09 FIGURE IT1 � �' o Li EXISTING Li 1/4" MESH GALY SOIL STEEL FABRIC TRENCH WIDTH CAN 0 VARY ACCORDING 1/2" STAINLESS GRAVEL / i a TO CONTRACTORS STEEL PIPE �� o F EQUIPMENT BUCKET CLAMP - WIDTH, FILL TRENCH 4" PVC PERF WITH CLEAN GRAVEL DRAIN PIPE (PERFORATIONS FACE DOWN @ 4 & 7 O'CLOCK) CHURCH OWC, LLC Onsite Wastewater Consultants Onsite Wastewater Engineering -Geological Engineering LOCATION OF INTERCEPTOR TRENCH P.O. Box 527, Wheat Ridge, Colorado 80034-0527 Voice: (720) 898-3434 Fax: (720) 898-3455 JOB NO. C550 DATE: 04/21/09 FIGURE IT1 M CHURCH OWC, LLC Onsite Wastewater Consultants April 6, 2009 Mr. and Mrs. Lester Towne 567 North Starwood Drive Aspen, CO 81612 Subject: Subsurface investigation and Repair OWS Design REVISED OWS REPORT 567 North Starwood Drive Lot 83, Starwood Pitkin County, Colorado Job No. C550 o%i" 41k `1 I11 /97 Mr. and Mrs. Towne, As requested, CHURCH Onsite Wastewater Consultants, LLC reviewed subsurface conditions at the subject site and designed a repair onsite wastewater system (OWS) for the existing residence. The subsurface conditions were performed in 1976 as a part of the original ISDS Permit 76033 for the residence. SITE CONDITIONS The property is located in a rural area in Pitkin County, where OWS are required. The proposed drainfield areas have a range of slope from 5 to 20% to the northwest. Vegetation varies from shrub oak to a lush cover of native grasses. The residence is served water by a community water system. EXISTING CONSTRUCTION The existing residence is a 4,400 square foot (SF) structure and has 5 -bedrooms. The flow rate for a residence with greater than 2000 SF is 75-gallons/day/person for an average daily flow of 750 gallons per day (GPD) and peak load of 1,125 GPD with a 1.5 peaking factor. The existing system consists of a 1,000 -gallon septic tank and a 2100 (21'X100 SF drainfield as indicated on Figure 1. The septic tank is corroded and will have to be replaced. The first 30 feet of the original field is saturated and has "failed". The western 70 feet of the field appears to not have received effluent and will be included in the repair design. The failure is believed to be related to a corroded pipes and settlement of ground at the first 30 feet of field. There is a existing landscape irrigation system in the area of the proposed chamber trenches. Irrigation must be removed from the area of the trenches and drip irrigation drainfield. SUBSURFACE CONDITIONS A subsurface investigation was performed by Pitkin County personnel in 1976. A percolation test was performed by COWC personnel to confirm percolation rate. Subsurface materials encountered 9590 West 14th Avenue Ste. 100, Lakewood, CO 80215 Voice 720-898-3434 FAX: 720-898-3455 Towne Residence OWS Repair C550, April 6, 2009 Page 2 in the profile pit consisted of sandy clay to 8 feet, the maximum depth explored. No ground water was encountered. The 1976 percolation rate of 80 minutes per inch (MPI) was confirmed. RECOMMENDATIONS There is a question with respect to ground water at the site, because of reports of groundwater uphill to the south. A test pit must be excavated above the automatic distributing valve area to determine the need for an interceptor drain. If needed the interceptor should be installed as indicated on Figure 2. The performance of the foundation drain at the residence should be confirmed. 1` Based on the poor percolation, a combination of drip -irrigation and chamber technology for the OWS drainfield is proposed. The OWS design is based on an average sewage load of 1,125 GPD d and a percolation rate of 80 MPI. A septic tank capacity of 1750 gallons and drainfield area of 2504 SF is required. The proposed OWS includes: 1) the replacement of the existing septic tank with a 1250 -gallon one -compartment tank followed by a 2 -compartment 1000 -gallon septic tank with an effluent pumping system and 2) a combination drip -irrigation and chamber trench drainfield, at the locations presented on Figure 2. The second tank will have an effluent pump in a Biotube° pump vault, as indicated on Figure 3. The pump will direct effluent to a 4 -outlet automatic distributing valve (ADV). From the ADV, effluent will flow to two sections of two single chamber trenches and two sections of drip irrigation field, as presented on Figure 4. Two sections of chambers are proposed along the steeper slope and two sections of drip irrigation drainfield over the 70 feet of existing drainfield. The OWS is to be installed as indicated on Figures 2 and 4. A pump curve is included as Figure 5. The surface of the field should be seeded after installation of the fields. The Pitkin County non- irrigated seed mix, in accordance with the Pitkin County Land Management Department, should be sown at the drainfield to re -vegetate the surface. These mixes do not require irrigation and develop a growth 10 to 15 inches high. No automatic sprinkler system should be installed over the field. The system described in this report was installed in 2007. This revision is intended to bring the existing system into compliance with the 2008 Pitkin County OWTS regulations for a 5 -bedroom residence less than 6,000 SF. INSTALLATION OBSERVATIONS The installation of this repair OWS and construction efforts are to be observed by the design engineer. These observations include drainfield construction observations. Other observations are prior to backfill. At those times, the septic tank riser and lids and pumping system external splice box are to be installed. The drainfield shall have distribution pipes extended to the ends of the new chambers and monitoring pipes extended to the surface. The entire chambered drainfield shall have a minimum of 12" of compacted soil over the chambers. Our office should be called at 970-948-5803 at least 48 hours in advance to observe the installation. These observations, repeat observations, design revisions, staling of drainfield or additional site visit requirements are not included with this design and will be at an additional unit rate fee. OPERATION AND PREVENTATIVE MAINTENANCE SCHEDULE The goal of an operation and maintenance schedule is to observe the operation and perform minor maintenance to the OWS to allow long term functioning of the system. An operation and Ab - Sincerely, CHURCH Onsite Wastewater Consultants, LLC. Robert W. Wright, P.E. i., , �►�J rrr Towne Residence OWS Repair 0550, April 6, 2009 Page 4 1 copy send in PDF format, via e-mail to Pitkin County Dept. F'rnvironmental Health & Natural Resources. 1 copy send in PDF format, via e-mail to Mr. Jered Boyden at Professional Excavating in Carbondale, CO. a n Towne Residence OWS Repair C550, April b, 2009 Page 3 maintenance schedule or contract with a private maintenance company is recommended. Septic tanks: The scum and sludge accumulation in the septic tanks should be monitored yearly. Once the scum or sludge thickness reaches 25% of the chamber depth, the entire chamber should be pumped. We anticipate a pumping frequency of 1 to 3 years at design flows. An alternative is a regular pumping frequency of every year. Frequent use of a garbage grinder will increase the pumping requirement. Filter and Effluent Pumping System: The effluent filter at the septic tank discharge should be cleaned (hosed of) at the time of pumping or as needed. The effluent pumps should be checked semi-annually to ensure pumps are functioning properly. If the alarm sounds, the pumps and floats should be checked and/or serviced immediately. Drainfield.- The surface of the fields is to be observed monthly for signs of failure such as lush vegetation growth or effluent ponding. Liquid levels in each field section are to be observed through the observation pipes and levels recorded. Flow to each field is to be controlled through the valves and should be diverted if effluent is observed ponding. General: System users must realize an OWS is different from public sewer service. There are daily considerations such as not putting plastic or other non -biodegradable material into the system. Water use should be monitored so toilets are not allowed to run when seals malfunction. Allowing fixtures to flow continuously to prevent water lines from freezing is not acceptable. Although the proposed OWS can accommodate variable flows, spreading water use over several hours and eliminating peak flows is recommended. To illustrate the point, a malfunctioning toilet can consume in excess of 1000 GPD. Excessive daily loading could flood and irreparably harm the OWS. COWL cautions against installation of a water softener. The chemical and hydraulic loading from the backwash of a water softener may be detrimental to the OWS and a separate drywell should be constructed for the backwash waste, if a softener is install- ed. No landscaping or plastic can be used over the field, which will reduce performance of the field. The design of the OWS is based on the treatment of domestic sewage only. Swimming pool or spa water is not to be discharged into the OWS. The proposed OWS design is based on design flows in the report. Increased flows may hydraulically or organically overload each respective OWS, causing premature failure. LIMITATIONS A contractor who is experienced in its installation must install an OWS design. Our investigation, layout, design and recommendations are based on data submitted. If subsurface conditions different from those described in this report are encountered, we should be notified to evaluate the change on the proposed OWS. If the health department modifies this design, we should be contacted to evaluate the impact on the performance of the OWS. The county and our firm must be contacted upon completion of the OWS All construction is to be in accordance with the ISDS regulations. Pipe type and size, burial requirements, septic tank construction, and other specifications, which are not depicted in our report, are to conform to the requirements of the ISDS regulations. The installer of the system is to have demonstrated knowledge of the PCEHD ISDS regulations and requirements. 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L, c O U f6 0 Ir 0 M om N u 0 fAy z O E n a� a� a� a� a� a� a� a� a E rn 6i o k .dl al- w Q �.��.+cnooa0vi0000 Om O M h ui O eV O rl [}' O O +"� c m `i •' M M O > d Oi Gl N Ll l0 N J ++ a OC 3 C a y � � � J J •N d G L � Uo1 L c[ c u J J -a w°~ S' LL O 3 O¢ O m o= o tAa +' z c y o z N v R p _ ; o � U- _ 0 Q) 7 \ � »,m' _rz a _� Ix_n�SS ;� _108 __a m; X_m; — _m ma ] ) ! : m z. /k §j w{ \ cz \ \ - � \ # § / § [ \ w , 11x Nmss dKL.� ZL ] ) ! : m z. /k §j w{ A CL , 11x (\//11 \22L>}{ 2 \0- N e \ a k § 0 `Ln V w Of \ k f 0 F V)& V) §§§ ) \2\ �\j \\wwwxz W» u U\�\( ƒ §§�5\e7 00 \ \ \ƒ � ()a A��&=# \ -•m O\®}\ $ ;/ Lon 2/i 2 $ // § C) 2 j 3�, _ �xm1.0 � 47#/ e R w 200 �7\#± & gq§)a/ =f @ « § Ogm /; WRa.%" A CHURCH OWC, LLC Onsite Wastewater Consultants September 17, 2008 Mr. and Mrs. Lester Towne 567 North Starwood Drive Aspen, CO 81612 Subject: OWS Repair Installation Observation -REVISION 567 North Starwood Drive Pitkin County, Colorado Job No. C550 Pitkin County Permit 97080 Mr. and Mrs. Towne, As requested, Church OWC, LLC, (COWC) observed the installation of a repair onsite wastewater treatmentsystem (OWTS) during Septemberand October 2007. The system is an emergencywinter repair designed for a five bedroom home, under Job No. C550 by COWC. The intent of this letter is to summarize the as -built condition of the system as requested by Ms. Carla Ostberg of. Pitkin County Department of Environmental Health & Natural Resources. The original system was noted to be operating in a failure mode with effluent surfacing. COWC visited the site, evaluated the site conditions and conducted percolation tests for a repair OWS design. The repair was installed by Professional Excavating of Glenwood Springs. The installation included: 1) a new 1250 -gallon single compartment septic tank and a 1000 -gallon, two-compartment septic tank/dosing tank and 2) four drainfield zones in two areas consisting of: [Area 1] placement of drip -irrigation piping over the west 70 feet of the existing drainfield for two - zones and [Area 2] four chambered trenches on the hillside to the south of the existing field, divided into two additional zones. The locations of the components are indicated on the COWC As -Built diagram Figure A, dated September 17, 2008. There is a cleanout adjacent to the house. An Orenco Pump Vault was installed in the 1,000 -gallon tank. An automatic distributing valve (ADV) directs effluent to the 4-drainfield zones in sequence. The original engineer's letter finalizing the installation observations of the repair system reported 11 chambers per trench in error. A site visit was made by Bob Wright on September 3, 2008 to field measure and verify the dimensions of the chambered trenches. The trench length measures 53 -feet, and therefore contains 13 -chambers per trench. To maintain a 5 -bedroom drainfield sizing, COWC recalculated the drainfield area using the revised 2008 OWTS Regulations and determined that 13 chambers per trench is adequate with the additional low pressure drip irrigation field to the north. At the time of our final installation observation, a test pit was excavated during installation of the drainfield trenches to evaluate whether there was groundwater flowing from the south to the drainfield area. No groundwater was observed and an interceptor trench was not needed or installed. 9590 West 14th Avenue Ste, 100, Lakewood, CO 80215 Voice 720-898-3434 FAX: 720-898-3455 r M Towne OWS Repair September 17, 2008, Page 2 The pump was in place at the time of our final site visit. An electrician completed final electrical con- nections and the pump functioned properly. The observed components of the OWS were installed in general conformance with our design and per the attached installer's as -built drawing. The installation observations do not imply a guarantee or warranty of materials or workmanship. If there are questions, or if you would like additional information, please feel free to contact us at your convenience. Sincerely, CHURCH Onsite Wastewater Consultants, LLC Op� Robert W. Wright, P. E. RWW \I M Copy to Pitkin County Environ. Health, 0405 Castle Creek Rd. Suite #10, Aspen, CO 81611 by e- mail to: Carla.Ostberg@co.pitkin.co.us Hard copy to Professional Excavating, 2102 Blake Avenue, Glenwood Springs, CO 81601 . e< . gw §E ] _ 0 ..m n i 'n U) \ k . S . . § � / a¥ �f§) )) \ \ §(§ L ° \§d§� �� 2f ° \ (B� ) d \ 00 ~ \( § < � w $ \ / 22)\ & \ 2 CL\ o R 33 . . \ \}/\ 7))j� . � . / he k i2 , . ® % * � 2{� 0 -vi Uk I�2 \ ( �w§ - §§§ e -d 32 k� 0§/) §\ UeƒfQ f uo2 �kof\ wL . .�77}� f§ } �)2f ( §\ _ / JR4 $ ƒcn b§ !�� R§4 6zzz ~x §6g ` \ f § \§§b & ;ems - 6 P v — J Un G U cn cli ci CD oi IJ ` v U 4l w n LO CID Inn � GSC j I ,� • ^�j, j � �'^ `. n �� o Page 1 of 2 Carla Ostberg From: Carla Ostberg Sent: Thu 4/2/2009 1:00 PM To: Robert Wright Cc: 'Katie Carney' Subject: RE: C550 -Towne OWS Attachments: Hi Bob and Katie, I reviewed revised Figure 4 and it looks like we're on the right track. I would rather you submit a new design with a new date, given the numerous errors in the text from the December 12, 2008 design. A new Figure 2 would be very helpful for the installer as well. Let me know if that's a problem. It will be so much cleaner to permit if the entire design is correct. In revised figure 4, 1 think there is some confusion about our calculation, although the numbers came out right. Average Daily Flow = 750 Q = 5 x 2 x 75 x 750 x 1.5 = 1125gpd A = (1125/5 x sq ft 80) x 1.4 loading factor = 2817 - 20%reduction for dosing = 2254 sq ft It seems like in your calculation you are mixing up the 1.5 peaking factor and the 1.4 loading factor. The 1.5 peaking factor is standard in calculating the desing flow (ours used to be 1.75). The 1.4 loading factor is something we added to the Area calculation and any reductions are taking from that calc. If you use secondary treatment, 1.0 can be used as the loading factor, resulting in a smaller absorption area. I hope that helps - I just didn't want there to be confusion in future designs. Thanks, Carla From: Robert Wright [mailto:rwright@cowc.info] Sent: Tue 3/31/2009 12:36 PM To: Carla Ostberg Cc: 'Katie Carney' Subject: C550 -Towne OWS Carla, I talked with Katie, and she indicated that she sent you a copy of the revised figure containing the updated drainfield calculations and the proposed 6 -additional chambers. I am checking to determine whether or not you have any questions about the additional chambers to the drainfield, as well as the other repairs that are to be made. All the other adjustments to the system involve the repair items from our letters to Professional Excavating: replace the broken riser, reattach the out of place external splice box, additional cover over the existing chambers. I spoke with Jered at Professional Excavating this morning, as he was wondering if we had sent the revision information to you. If there are questions, or if you would like additional information, please feel free to contact us at your https://owa.aspenpitkin.com/exchange/Carla.Ostberg/Sent%20Items/RE: %200550 -Towne... 4/2/2009 Carla Ostberg From: jeredboyden@comcast.net Sent: Tuesday, March 10, 2009 5:32 PM To: Carla Ostberg Subject: Towne Residence March 9, 2009 Dear Ms. Ostberg, I have recieved your letter about 567 N. Starwood Dr. and I am holding this job at the top of my list of things to be completed. I had a meeting with Bob and Katie from Church OWS about this jobsite. I will get up there and fix this problem as soon as the snow is melted. I have given a copy of a new written construction plan from Professional Ex. to Church OWS of how jobs will be completed in the future. With this written plan I hope to acheive the status again of a Church OWS installer and installer for Pitkin County also. If you have any questions or would like a copy of this written plan please feel free to call me anytime. Respectfully, Jered Boyden Field Supervisor Professional Excavating (970)379-3592 L1 Pitkin foi�- February 23, 2009 OVERNIGHT MAIL Manuel Landa Professional Excavating 2102 Blake Avenue Glenwood Springs, CO 81601 Re: Towne Residence 567 N. Starwood Drive Dear Mr. Landa, k ___Environmental Health and Natural Resource You are currently a Licensed Systems Contractor under the Pitkin County Onsite Wastewater Treatment System (OWTS) Regulation'. That license requires you to ensure that: Construction, installation, alteration, repair, inspection, or cleaning of any OWTS shall be in compliance with [the] Regulation and with the conditions set forth in the permit. OWTS Regulation Sec. 6.28.150(C)(1)(a). On November 3, 2008, you were sent a written notice that the installation of the OWTS at 567 N. Starwood Drive, was not in compliance with Pitkin County's OWTS Regulation. It is the understanding of this Department that problems with that installation have not been remedied. Please respond to this Department no later than March 10, 2009 with a timeframe in which OWTS installation issues will be corrected. This timeframe must be reasonable and accepted by this Department, Church OWC, LLC, and the property owners. In addition, this Department was copied on a letter from Church OWC, LLC dated January 29, 2009 stating they would no longer provide installation observations or write engineer's letters of adequacy for installations of OWTSs installed by your company, citing poor performance evidenced in 2007 & 2008. Please be advised that future non-compliance with standards of performance as a Licensed Systems Contractor will result in license revocation proceedings. Revocation of your license will preclude you from installing OWTSs in Pitkin County for at least one year. We hope that you take this matter very seriously. If you have any questions about the requirements of your license or expectations of your timely response to this letter, please let me know. Sincerely, e&,,-, C,, Carla Ostberg, MPH, REHS Environmental Health Program Supervisor 970-920-5438 cc: Bob Wright, COWC ' Pitkin County Code Sec. 6.28, Onsite Wastewater Treatment Systems (http://www.aspenpitkin.com/pdfs/depts/12/isds.pdf ). 0405 Castle Creek Road, Suite 10 Aspen, Colorado 81611 Phone: (970) 920-5070 Fax: (970) 920-5077 www.aspenpitkin.com/ehnr CHURCH OWC, LLC Onsite Wastewater Consultants January 29, 2009 Professional Excavating 2102 Blake Avenue Glenwood Springs, CO 81601 Subject: Suspension of Installation Observations For COWC OWTS Systems Dear Mr. Landa, RECEIVED FEB 0 3 2009 &mental Healm Resoo+�es This letter is to inform you that CHURCH Onsite Wastewater Consultants, LLC (COWC) will nc longer provide installation observations or write engineer's letters of adequacy for the installation of onsite wastewater treatment systems (OWTS) for systems designed by our firm, that Professional Excavating installs. The basis for this withdrawal of our support for your installation of these systems is the poor performance of your company in installing, repairing and providing warrantee work on systems, as evidenced by past performance in 2007 & 2008. COWC will inform any client of this status when it is learned that Professional Excavating has been retained to install the system. COWC is willing to work with Professional Excavating to reinstate the company to a status which will allow us to observe and provide engineer's letters for our systems, only after a meeting between principals of our firms and a written plan by Professional Excavating that details how your firm intends to provide installations of the quality that COWC can feel comfortable observing and documenting. You may contact us at your convenience should you wish to discuss this letter. Sincerely, CHURCH Onsite Wastewater Consultants, LC Robert W. Wright, PE Principal cc: Ms. Carla Ostberg, Pitkin County Environmental Health & Natural Resources Department, 0405 Castle Creek Road, Suite 10, Aspen, CO 81611 9b9U west 14th Avenue Ste. 100, Lakewood, CO 80215 Voice 720-898-3434 FAX: 720-898-3455 n Carla Ostberg From: Carla Ostberg Sent: Monday, January 12, 2009 3:38 PM To: 'Robert Wright' Subject: Towne, job C550 Hi Bob, I have reviewed the Towne application and have a few problems with the design. I don't think I can issue a permit as -is. We need to talk about this in more detail, so after you've had a chance to look at the design and my comments, please give me a call. In your text, page 2, you state a septic tank capacity of 1750 gallons and gross drainfield are of 2504 sf is required. These numbers are incorrect. They should be 2254 sq ft and 1125 gallons. It also says you took at 30% reduction for chambers. No reductions are allowed for chambers in soils greater than 60 mpi. The text indicates that 9.2 sf was used to calculate number of chambers. This should be 9.87. Your paragraph on page 3, Limitations, is a little outdated. Calculations on Figure 4 appear to be correct, but still it looks like a 30% reduction was taken for chambers — and we can't do that according to our regulations. After looking at this in detail — it appears that you could take a 20% reduction for dosing of the system. That would lead us to 1803 sq ft necessary for a 4 bedroom home. 1803-1680 (drip) = 123 sq ft needed / 9.87 = 12 chambers. This would give us enough — BUT, this is not a 4 bedroom house according to the floorplans that I have and past correspondence from Nancy. It looks like it's 5, which would mean they need 2254 (w/ the 20% reduction for dosing) —1680 for drip = 574 / 9.87 = 58 chambers. Let me know what you think of what I was able to decipher from this file and your design and I think we can still work out something that won't mean digging the yard up again. Carla Ostberg, REHS Environmental Health Program Supervisor Pitkin County Environmental Health and Natural Resources 970-920-5438 ISDS DESIGN CALCULATIONS - for Pitkin Owner's Name`, Parcel ID #i<z = "' k'• House Size (sq. ft.) ;* r (75 gpd or 100 gpd) _ 75 Number of Bedrooms in Main House Number of Offices, Libraries Studies Similar -sized Rooms in Main House Number of Bedrooms in Detached Caretaker unit '4th Number of Offices, Studies, Similar -sized Rooms in Caretaker Unit (If the caretaker unit is ATTACHED, treat as if part of main house.) Average Daily Waste Flow 750 State Review Required? no Perc Rate L,"M (T) Design Flow (Q) = # potential bedrooms X 2 people/bedroom X gpd X 1.5 Q= 1125 Minimum tank capacity 1406 gallons Absorption Area (=Q/5 X SQRT perc rate)(1.4 loading factor) A = 2,817 sq. ft. of absorption area required Absorption Area (=Q/5 X SQRT perc rate) WITH SECONDARY TREATMENT (no loading factor) A= 2,012 sq. ft. of absorption area required Abs. Area w/ loading factor (B25) Trench Bed Quick4 Trench Quick4 Bed Pipe and Gravel (-10%) 2536 no red. 2817 257 285 Dosing (-20%) (-20%) e 2254 228 228 Chambers (-30%) (-10%) 2536 200 257 Max Allowable -50% 1409 (-30%) 1972 143 200 Secondary Treatment Abs Area w/ out loading factor (B28) Trench Bed Pipe and Gravel (-10%) 1811 no red. 2012 184 204 Dosing (-20%) 1610 (-20%) 1610 163 163 Chambers (-30%) 1409 (-10%) 1811 143 184 Max Allowable (-50%) 1006 (-30%) 1409 102 143 110 SETBACK FROM WELL # of feet = 60 SETBACK FROM POND, STREAM OR IRRIGATION DITCH # of feet = 35 SETBACK FROM DRY GULCH # of feet = 2254- 1�8fl 514 1,-�'j. S c be.fs LJ CHURCH OWC, LLC Onsite Wastewater Consultants December 12, 2008 Mr. and Mrs. Lester Towne 567 North Starwood Drive Aspen, CO 81612 Subject: Subsurface Investigation and Repair OWS Design 567 North Starwood Drive Lot 83, Starwood Pitkin County, Colorado Job No. C550 Mr. and Mrs. Towne, As requested, CHURCH Onsite Wastewater Consultants, LLC reviewed subsurface conditions at the subject site and designed a repair onsite wastewater system (OWS) for the existing residence. The subsurface conditions were performed in 1976 as a part of the original ISDS Permit 76033 for the residence. This set of documents is submitted for the purpose of obtaining a revised 0V\/TS permit for the actual effluent infiltration field size installed during the repair under current Pitkin County OWTS regulations effective March, 2008. �70g0 iMprvp rCy SITE CONDITIONS The property is located in a rural area in Pitkin County, where OWS are required. The proposed drainfield areas have a range of slope from 5 to20% to the northwest. Vegetation varies from scrub oak to a lush cover of native grasses. The residence is served water by community water system. EXISTING CONSTRUCTION The existing residence is a 4,400 square foot (SF) structure and has 4 -bedrooms. The flow rate for a residence with less than 6,000 SF is 75-gallons/day/person for an average daily flow of 600 gallons per day (GPD) and peak load of 900 GPD with a 1.5 peaking factor. The existing system consists of a 1000 -gallon septic tank and 2100 (21' X 100) SF drainfield as indicated on Figure 1. The septic tank is corroded and will have to be replaced. The first 30 feet of the original field is saturated and has "failed". The western 70 feet of the field appears to not have received effluent and will be included in the repair design. The failure is believed to be related to a corroded pipes and settlement of ground at the first 30 feet of field. There is a existing landscape irrigation system in the area of the proposed chamber trenches. Irrigation has been removed from the area of the trenches and drip irrigation drainfield. 9590 West 14th Avenue Ste. 100, Lakewood, CO 80215 Voice 720-898-3434 FAX: 720-898-3455 n SUBSURFACE CONDITIONS Repair OWS Design, Towne Residence December 12, 2008, C550, Page 2 A subsurface investigation was performed by Pitkin County personnel in 1976. A percolation test was performed by COWC personnel to confirm percolation rate. Subsurface materials encountered in the profile pit consisted of sandy clay to 8 feet, the maximum depth explored. No ground water was encountered. The 1976 percolation rate of 80 minutes per inch (MPI) was confirmed. RECOMMENDATIONS There was a question with respect to ground water at the site, because of reports of groundwater uphill to the south. A test pit was excavated above the automatic distributing valve area to determine the need for an interceptor drain. During installation it was determined that an interceptor drain was not required. Based on the poor percola ' n, a combination of drip -irrigation and chamber technolo9yferthe OWS drainfield was inst d. The OWS design is based on a peak sewage load of 900 GPD and a percolation rate of 80 MPI. A septic tank capacity of 1750 gallons and gross drainfield area of 2504 SF is required. 1,680 SF of low pressure drip field was installed over the existing drip bed. The remaining field area (2,504 SF -1,260 SF= 574 SF) was installed in trenches using Quick4 Chambers with reductions taken for chambers (30 /o) for a total chambered ncharea of (574 SF X 0.70= 402 SF). Chambers were calculated with an allowable area o 9 2 SF' for a total number of chambers required of (402/9.2= 44). A total of 52 chambers w installed in the trenched section of field. F1 0 NQ The proposed OWS includes: 1) the replacement of the septic tank with a 1250 -gallon one - compartment tank followed by a 2 -compartment 1000 -gallon septic tank capacity for an effluent pumping system and 2) a combination drip -irrigation and chamber trench drainfield, at the locations presented on Figure 2. The second tank, a 1000 -gallon two-compartment tank, will have an effluent pump in a Biotube° pump vault, as indicated on Figure 3. The pump will direct effluent to a 4 -outlet automatic distributing valve (ADV). From the ADV, effluent will flow to two sections of two single row chambered trenches and two sections of drip irrigation field, as presented on Figure 4. Two sections of chambers are along the steeper slope and two sections of drip irrigation drainfield were installed over the 70 feet of existing drainfield. The surface of the field should be seeded after installation of the fields. A native seed mix should be sown at the drainfield to re -vegetate the surface. These mixes do not require irrigation and develop a growth 10 to 15 inches high. No automatic sprinkler system should be installed over the field. INSTALLATION OBSERVATIONS The installation of the OWS is to be observed by the design engineer. These observations include drainfield construction observations. Other observations are prior to backfill. At those times, the septic tank and pumping system are to be installed with risers on the tank, and inlet and outlet connections properly bedded. The drainfield shall have distribution pipes in place. A final observation is required once the electrical connection has been made prior to placing the OWS into service. Our office should be called at 970-948-5803 at least 48 hours in advance to observe the installation. These observations, repeat observations, design revisions, staking of drainfield or additional site visit requirements are not included with this design and will be at an additional unit rate fee. ReP OWS Design, Towne Residence December 12, 2008, C550, Page 3 OPERATION AND PREVENTATIVE MAINTENANCE SCHEDULE The goal of an operation and maintenance schedule is to observe the operation and perform minor maintenance to the OWS to allow long term functioning of the system. An operation and maintenance schedule or contract with a private maintenance company is recommended. Septic tanks: The scum and sludge accumulation in the septic tanks should be monitored yearly. Once the scum or sludge thickness reaches 25% of the chamber depth, the entire chamber should be pumped. We anticipate a pumping frequency of 1 to 3 years at design flows. An alternative is a regular pumping frequency of every year. Frequent use of a garbage grinder will increase the pumping requirement. Filter and Effluent Pumping System: The effluent filter at the septic tank discharge should be cleaned (hosed off) at the time of pumping or as needed. The effluent pumps should be checked semi-annually to ensure pumps are functioning properly. If the alarm sounds, the pumps and floats should be checked and/or serviced immediately. Drainfield: The surface of the fields is to be observed monthly for signs of failure such as lush vegetation growth or effluent ponding. Liquid levels in each field section are to be observed through the observation pipes and levels recorded. Flow to each field is to be controlled through the valves and should be diverted if effluent is observed ponding. General: System users must realize an OWS is different from public sewer service. There are daily considerations such as not putting plastic or other non -biodegradable material into the system. Water use should be monitored so toilets are not allowed to run when seals malfunction. Allowing fixtures to flow continuously to prevent water lines from freezing is not acceptable. Although the proposed OWS can accommodate variable flows, spreading water use over several hours and eliminating peak flows is recommended. To illustrate the point, a malfunctioning toilet can consume in excess of 1000 GPD. Excessive daily loading could flood and irreparably harm the OWS. COWC cautions against installation of a water softener. The chemical and hydraulic loading from the backwash of a water softener may be detrimental to the OWS and a separate drywell should be constructed for the backwash waste, if a softener is install- ed. No landscaping or plastic can be used over the field, which will reduce performance of the field. The design of the OWS is based on the treatment of domestic sewage only. Swimming pool or spa water is not to be discharged into the OWS. The proposed OWS design is based on design flows in the report. Increased flows may hydraulically or organically overload each respective OWS, causing premature failure. LIMITATIONS A contractor who is experienced in its installation must install an OWS design. Our investigation, layout, design and recommendations are based on data submitted. If subsurface conditions different from those described in this report are encountered, we should be notified to evaluate the change on the proposed OWS. If the health department modifies this design, we should be contacted to evaluate the impact on the performance of the OWS. The county and our firm must be contacted upon completion of the OWS All construction is to be in accordance with the ISDS regulations. Pipe type and size, burial requirements, septic tank construction, and other specifications, which are not depicted in our report, are to conform to the requirements of the ISDS regulations. The installer of the system is 11 Repair OWS Design, Towne Residence December 12, 2008, C550, Page 4 to have demonstrated knowledge of the PCEHD ISDS regulations and requirements. If there are questions, please feel free to contact us at your convenience. Sincerely, CHURCH Onsite Wastewater Consultants, LLC. Robert W. Wright, P.E. NM 1 copy sent to: Pitkin County Department of Environmental Health & Natural Resources, 0405 Castle Creek Road, Suite 10, Aspen, CO 81611 1 copy sent to: Mr. and Mrs. Lester Towne, 567 North Starwood Drive, Aspen, CO 81612 pilkin County___ ___ Environmental Health and Natural Resources November 3, 2008 Manuel Landa Professional Excavating 2102 Blake Avenue Glenwood Springs, CO 81601 Re: Towne Residence 567 N. Starwood Dear Mr. Landa, You are currently a Licensed Systems Contractor under the Pitkin County Onsite Wastewater Treatment System (OWTS) Regulation'. That license requires you to ensure that: Construction, installation, alteration, repair, inspection, or cleaning of any OWTS shall be in compliance with [the] Regulation and with the conditions set forth in the permit. OWTS Regulation Sec. 6.28.150(C)(1)(a). After several months of correspondence between this Department and Church Onsite Wastewater Consultants (COWC), it has become clear that the system installed at 567 N. Starwood was not in compliance with the design permitted by this Department (ISDS Permit 07080 issued on 3/25/08 for Project #C550 dated 9/17/07 with revisions to the letter and Figures 3, 4, & 5 dated 9/24/07). On 10/15/08, 1 conducted a site visit with Bob Wright from COWC. It was apparent that there were some unresolved issues with the installation including an exposed chamber at the end of one of the trenches and a spice box that has become detached from the riser. Please be advised that your license may be revoked for failure to comply with the OWTS Regulation. Revocation of your license will preclude you from installing OWTSs in Pitkin County for at least one year. Thus, we hope that you take this matter very seriously and that your future OWTS installations conform to Pitkin County's regulations. If you have any questions about the requirements of your license, please let me know. Sincerely, Carla Ostberg, REHS Environmental Health Program Supervisor 970-920-5438 cc: Bob Wright, COWC Pitkin County Code Sec. 6.28, Onsite Wastewater Treatment Systems (http://www.aspenpitkin.com/pdfs/depts/12/isds.pdf ). 0405 Castle Creek Road, Suite 10 Aspen, Colorado 81611 Phone: (970) 920-5070 Fax: (970) 920-5077 www.aspenpitkin.com/ehnr t PITKIN COUNTY COMMUNITY DEVELOPMENT DEPARTMENT 130 South Galena Street 3r.d Floor Aspen, Colorado 81611 (970) 920-5526 FAX # (970) 920-5439 December 15, 2008 Leslie & Ethel Towne C/O Bob Wright 567 N Starwood Dr Aspen, CO 81611 RE: Septic System Reapplication for Emergency Repairs (PID #2643-261-01-001, 600 N Starwood Dr, Blk 14, Lot R-83, Starwood Fourteen) Dear Mr. and Mrs. Towne: After reviewing your plans for the emergency repairs that were made to the septic system at the above reference address in late fall 2007, it has been determined that the new, trenched, chambered section of the drain field to the south of the existing drain field is exempt from formal planning pursuant to Section 7-10-30(b). The current system, although located outside an approved activity/building envelope, was permitted by Environmental Health in its current location. The expansion appears to be located in an area free of as defined by Chapter 7 of the 2006 Land -. Use Code. Due to the location of the septic system outside an approved envelope, the expansion is however, subject to the following conditions: Conditions 1. The Applicant shall adhere to all representations made during the exemption process. 2. The Applicant shall limit the amount of disturbance to the area around the septic system expansion to the minimum required for installation. 3. All areas disturbed by construction shall be re -vegetated with native grasses and/or shrubs within one growing season of the project's completion. 4. The septic system must comply with the new OWTS regulations adopted 3/8/2008. 5. The sewage disposal system must be designed by a Registered Professional Engineer. 6. No landscaping, other than approved native grasses shall be placed over the absorption field. Be advised that all other zoning and building codes and regulations are applicable. This exemption is not vested and may not be applicable at the time of permit submittal. Please be advised that you must comply with the conditions of the OWTS Construction Permit. Provide a copy of this letter to Environmental Health as proof of your Land Use approval to obtain your Septic Permit. Additionally you may be required to obtain an Access and/or Earthmoving Permit. Please check with the County Engineer for more information. Sincerely, c a.,& Mo&o4 Cari Anne Holcomb Planner Community Development Pitkin County 130 South Galena Street, 3rd Floor, Aspen, CO 81611 970.920.5092 (Phone) 970.920.5439 (Fax) carianneh(a-)-co.pitkin.co.us 2.17 ACRES LOT 83, STARWOOD #14 567 N. STARWOOD DRIVE PITKIN COUNTY, COLORADO CUT & CAP EX►PAPE TANK OUTFALL BLDG SEWER CUT EXIST CONNECTED WET AREA — �P� NTO EW BA^ SE IG 2 00 6 MIL PVC LINER ON SIDEWALL OF 3 SIDES EXISTING RESIDENCE I EXIST 1250—GAL CONC SEPTIC TANK TO BE REMOVED �. . 0 N. STARWOOD DR. IRRIGATION DITCH SCALE 1" = 40' Ute UN U rsr:LUL, No. Revision Date CHURCH OWC, LLC TOWNE RESIDENCE OWS REPAIR DRAWN BY: RJM Onsite Wastewater Consultants CHECKED BY: EOC Onsite Wastewater Engineering - Geological EngineeringDATE: 08/2007 9590 W. 14th Ave., Ste 100, Lakewood, CO 80215 SITE PLAN JOB NO. C550 Voice: (720) 898-3434 Fax: (720) 898-3455 FIGURE 1 2.17 ACRES — — —� LOT 83, STARWOOD #14 — — �- 567 N. STARWOOD DRIVE — — PITKIN COUNTY, COLORADO — — �— NOTE: LENGTH OF CHAMBERS IN TRENCH DRAINFIELD VERIFIED BY FIELD MEASUREMENT ON 9/2/08 AT 53 FT. (1 v O OX • SEASONAL IRRIGATION D EXISTING RESIDENCE ECK 11 ECK /\-1250—GAL /ONE—COMP SEPTIC TANK \\-1000—GAL TWO—COMP ° SEPTIC TANK WITH e PUMP SYSTEM IN ' SECOND COMPARTMENT 2" SCH a 40 PVC / c EFFLUENT IA PIPE (TYP) POSSIBLE INTERCEPTOR DRAIN m ' \ / &Q� � ;off\GP 2" SCHED 40 1 PVC PIPE a� 2 3 AUTOMATIC 5 4 / DISTRIBUTING VALVE (ADV) 7 4 OUTLET DRIVEWAY SCALE ` J 8 1 " = 20 9 � /\66 �� J� 10 / OBSERVATION PIPE,- TYP, TO BE 12— INSTALLED 13- 4 TRENCHES W/13 QUICK4 CHAMBERS IN — N. STARWOOD DR. EA. TRENCH. INSTALL TWO MANIFOLDS W/2 TRENCH REVISED 12/04/07, RWW PER MANIFOLD DRAWN: YJ M CHURCH OWC, LLC TOWNE RESIDENCE OWS REPAIR No. Revision Date CHECKED EJC REVISED 12,/04/07, RWW DATE: 9/17 2008 Onsite Wastewater Consultants Onsite Wastewater Engineering - Geological Engineering DRAINFIELD LAYOUT REVISED 9/17/08, RWW 9590 W. 14th Ave., Ste 100, Lakewood, CO 80215 JOB NO. C550 Voice: (720) 898-3434 Fax: (720) 898-3455 FIGURE 2 Slope Ground Away from Riser INLET F TYPICAL SEPTIC TANK PROFILE ONE 1250—GALLON, ONE OR TWO COMPARTMENT, SEPTIC TANK FOLLOWED BY ONE 1000—GALLON, TWO—COMPARTMENT, SEPTIC TANK WITH EFFLUENT PUMP AUTOMATIC DISTRIBUTING VALVE (ADVi ORENCO V4404A PLAN VIEW RISER OUTLET PIPE, TYP _ SEPTIC z N - (INSULATED) 1. AUTOMATIC 2�_ DISTRIBUTING �C VALVE C 25" X 2" EDUCER (TYP) — AT A LOCATION TO PROVIDE A MIN SLOPE OF 2% IN THE SEWER PIPE CHURCH OWC, LLC Onsite Wastewater Consultants Onsite Wastewater Engineering - Geological Engineering 9590 W. 14th Ave., Ste 100, Lakewood, CO 80215 Voice: (720) 898-3434 Fax: (720) 898-3455 2" X 1.25" 2" EFFLUENT REDUCER PIPE FROM PUMP PROFILE VIEW External PVC Splice with Cord Grips Conduit to — Fiberglass Gasketed Lid with 3" Foam Insulation PVC Riser with Grommet(s) (bond to tank adapter with recommended adhesive) Float Tree Handle (See Note 3) Effluent Filter Handle (See Note 3) Cold Weather Discharge Assembly — Flexible Hose Effluent Discharge Tank Adapter (cast or bolted) OSI Effluent Pump BiotubdP Pump Vault —24" DIAMETER PVC RISER SEPTIC TANK: (INSULATED) 1. THE SEPTIC TANK(S) SHALL BE LOCATED TO MEET THE FOLLOWING SPECIFICATIONS: 2�_ — AT A LOCATION DOWN GRADIENT FROM THE HOUSE — AT A LOCATION ACCESSIBLE FOR PUMPING AND MAINTENANCE OF THE TANK — AT A LOCATION TO PROVIDE A MIN SLOPE OF 2% IN THE SEWER PIPE 2. SEPTIC TANK SHALL NOT BE INSTALLED WITH MORI= THAN 3 FEET OF SOIL COVER. 3. SEPTIC TANK SHALL BE INSTALLED WATER TIGHT. INSTALLER SHALL PERFORM A WATER AUTOMATIC DISTRIBUTING TIGHTNESS TEAT TO ENSURE ALL TANK AND RISER JOINTS ARE WATER TIGHT. VALVE ASSEMBLY 4. SEPTIC TANK SHALL INCLUDE A PUMP VAULT SYSTEM. 5. EFFLUENT PUMPING SYSTEM SHALL COMPLY WITH SPECIFICATIONS LISTED IN FIGURE 7. RISERS: -OUTLET PIPE, TYP 6. ALL TANKS SHALL BE INSTALLED WITH WATER PROOF ACCESS RISERS AND BOLT DOWN LIDS. ALL TANKS SHALL HAVE AN ACCESS RISER FOR EACH COMPARTMENT. 7. INSTALLER SHALL PROVIDE A 30 INCH ACCESS RISER ABOVE THE PUMP VAULT SYSTEM. ALL OTHER ACCESS RISERS SHALL HAVE A MIN. DA. OF 24 INCHES. AUTOMATIC DISTRIBUTING VALVE (ADV) 8. THE ADV SHALL BE INSTALLED AT THE HIGH POINT BETWEEN THE PUMP AND THE FIELD. 9. THE ADV SHALL BE INSTALLED IN A 24" MIN. DIA. ACCESS RISER, ACCESS RISER SHALL EXTEND TO FINISH GRADE. TOWNE RESIDENCE REPAIR OWS SEPTIC TANK AND ADV DETAILS No. Revision Date DRAWN BY: DNL 1 INCLUDE DOSING VOLUMES 9/24/07 CHECKED BY: EOC DATE: 06/2007 JOB NO. C55C FIGURE C Y z— 4" OBSERV IN PIPE, TYP DRAINFIELD TRENCH DETAIL PLAN PIPE CAP, TYP 4" OBSERVATION PIPE, TYP EXTENT OF EXCAVATION kITr) DRAINFIELD TRENCH DETAIL PROFILE kiir) .T. S 2" SOLID PVC MANIFOLD, TYP (SEE NOTE 2) CHAMBERED DESIGN CRITERIA CHAMBERED TRENCH S IFICATIONS RESIDENCE= 4 BEDROOMS 30% REDUCTION= 0.3 x 574 SF= 402 SF 3'x4' INFILTRATOR QUICK 4 GRAVELLESS CHAMBER 4 X 75 X 2= 600 GPD NUMBER OF TRENCHES — 4 PERCOLATION RATE= 80 MPI LENGTH OF TRENCHES — 44 FEET, 11 CHAMBERS AREA= (1.5 X 600 X 80 )/5= 2254 SF TOTAL NUMBER OF CHAMBERS= 402 SF/9.2 SF/CHAMBER= 44 2254 SF— 1680 SF 2" SCH 40 EFFLUENT PIPE FROM ADV, TYP —1� USE 52 CHAMBERS FOR A TOTAL AREA — 478 SF =4===4 2" SCH 40 PERFORATED PVC LATERAL, TYP 44' DRAINFIELD TRENCH DETAIL PLAN PIPE CAP, TYP 4" OBSERVATION PIPE, TYP EXTENT OF EXCAVATION kITr) DRAINFIELD TRENCH DETAIL PROFILE kiir) .T. S 2" SOLID PVC MANIFOLD, TYP (SEE NOTE 2) CHAMBERED DESIGN CRITERIA CHAMBERED TRENCH S IFICATIONS RESIDENCE= 4 BEDROOMS 30% REDUCTION= 0.3 x 574 SF= 402 SF AVE DAILY LOAD= q= 4 X 75 X 2= 600 GPD NUMBER OF TRENCHES — 4 PERCOLATION RATE= 80 MPI LENGTH OF TRENCHES — 44 FEET, 11 CHAMBERS AREA= (1.5 X 600 X 80 )/5= 2254 SF TOTAL NUMBER OF CHAMBERS= 402 SF/9.2 SF/CHAMBER= 44 2254 SF— 1680 SF DRIP IRRIGATION= 574 SF USE 52 CHAMBERS FOR A TOTAL AREA — 478 SF 761 4 0I¢ 2" EFFLUENT PIPE FROM ADV— VENT PIPE, TYP BACKFILL SOIL, TYP 2' (TYP) EXTENT OF EXCAVATION DRIP IRRIGATION DESIGN CRITERIA RESIDENCE= 4 BEDROOMS AVE DAILY LOAD= q= 600 GPD PERCOLATION RATE= 80 MPI AREA= (1.5 X 600 X 80 )/5= 2254 SF 24' X 70' DRIP IRRIGATION= 1680 SF GROUND SURFACE 2 (TYP) / PERFORATED PVC LATERAL, TYP N1 W 0 0 V) �z� OE 0 m J a]� CY Q oXg w a M LU U_ 00 io N JF_ of W O X M 0 W DRIP IRRIGATION TRENCH SPECIFICATIONS NUMBER OF TRENCHES — 12 LENGTH OF TRENCHES — 70 FEET NUMBER OF SECTIONS= 2 W/6 LATERALS EA. TOTAL DRIP IRRIGATION AREA — 1680 SF TOTAL ABSORPTION AREA, DRIP + CHAMBERS= 2,082 SF 2,082 SF IS EQUIVALENT TO 2,254 SF W/O CHAMBER REDUCTION CHURCH OWC LLC TOWNE RESIDENCE OWS REPAIR No. Revision Date DRAWN "BYu 1. NL 1 REVISE DRAINFIELD LENGTH 9/25/07 CHECKED BY: CO Onsite Wastewater Consultants DATE: 12/1//2008 Onsite Wastewater Engineering - Geological Engineering FIELD DETAILS 9590 W. 14th Ave., Ste 100, Lakewood, CO 80215 .10B Voice: (720) 898-3434 Fax: (720) 898-3455 FIGURE 2" SOLID PVC MANIFOLD, TYP (SEE NOTE 2) �— 2" PVC VENT PIPE, TYP (SEE NOTE 6) Z UjU N 2" PERFORATED PVC LATERAL, TYP (SEE NOTES 3&5) 0I¢ 2" EFFLUENT PIPE FROM ADV— VENT PIPE, TYP BACKFILL SOIL, TYP 2' (TYP) EXTENT OF EXCAVATION DRIP IRRIGATION DESIGN CRITERIA RESIDENCE= 4 BEDROOMS AVE DAILY LOAD= q= 600 GPD PERCOLATION RATE= 80 MPI AREA= (1.5 X 600 X 80 )/5= 2254 SF 24' X 70' DRIP IRRIGATION= 1680 SF GROUND SURFACE 2 (TYP) / PERFORATED PVC LATERAL, TYP N1 W 0 0 V) �z� OE 0 m J a]� CY Q oXg w a M LU U_ 00 io N JF_ of W O X M 0 W DRIP IRRIGATION TRENCH SPECIFICATIONS NUMBER OF TRENCHES — 12 LENGTH OF TRENCHES — 70 FEET NUMBER OF SECTIONS= 2 W/6 LATERALS EA. TOTAL DRIP IRRIGATION AREA — 1680 SF TOTAL ABSORPTION AREA, DRIP + CHAMBERS= 2,082 SF 2,082 SF IS EQUIVALENT TO 2,254 SF W/O CHAMBER REDUCTION CHURCH OWC LLC TOWNE RESIDENCE OWS REPAIR No. Revision Date DRAWN "BYu 1. NL 1 REVISE DRAINFIELD LENGTH 9/25/07 CHECKED BY: CO Onsite Wastewater Consultants DATE: 12/1//2008 Onsite Wastewater Engineering - Geological Engineering FIELD DETAILS 9590 W. 14th Ave., Ste 100, Lakewood, CO 80215 .10B Voice: (720) 898-3434 Fax: (720) 898-3455 FIGURE TYPICAL FIELD CROSS SECTION VENT PIPE,BACKFILL SOIL, TYP �TYP FINISHED GRADE N Z EXISTING 4" PVC DRAINFIELD BELOW �,� a° ° O PROPOSED 2" PVC DRIP LATERALS o0 0� 00 ° POORLY DISTRIBUTED GRAVEL �\ 2' (TYP) EXISTING RECEIVING SOIL / � �� . \�� / �` ' PERFORATED ,\\ , PVC LATERAL, TYP EXTENT OF EXCAVATION NOTES: 1. EXISTING DRAINFIELD LATERALS ARE NOT INSTALLED LEVEL. 2. EXISTING DRAINFIELD LATERALS ARE NOT INSTALLED ALL AT THE SAME ELEVATION. 3. EXISTING DRAINFIELD GRAVEL IS NOT EVENLY DISTRIBUTED OVER THE ENTIRE DRAINFIELD. 4. 2" SCHED 40 PVC DRIP LATERALS ARE DESIGNED TO DISTRIBUTE EFFLUENT OVER THE ENTIRE 1,680 SF OF EXISTING DRAINFIELD AREA. 5. EXISTING DRAINFIELD SOIL PERCOLATION RATE HAS BEEN ESTABLISHED AT 80 MPI PER PITKIN COUNTY HEALTH DEPT. 6. TOTAL ALLOWABLE DOSE VOLUME TO DRIP FIELD= 536.7 GPD. TOTAL ALLOWABLE DOSING TO CHAMBERED DRAINFIELD= 500.9 GPD. TOTAL DESIGN FLOW PER DAY= 1,000 GALS= 500 GALS PER DRAINFIELD. BOTH DRAINFIELDS CAN ACCEPT MORE THAN 500 GALS PER DAY. CHURCH OWC, LLC TOWNE RESIDENCE OWS REPAIR Onsite Wastewater Consultants Onsite Wastewater Engineering -Geological Engineering OLD VS NEW DRAINFIELD RELATION 9590 W. 14th Ave., Ste. 100, Lakewood, CO 80215 Voice: (720) 898-3434 Fax: (720) 898-3455 JOB NO. C550 DATE: 09/2007 FIGURE 5 Aug 31 07 02:41p Lynda & Briar rdwards 963 1540 p.2 Church and Associates. Inc. TABLE 1 - Percolation Test Results 567 North Starwood Pitkin County Feet Description S' r NO GROUNDWATER WAS ENCOUNTERED WITHIN EXCAVATION 718/2029 Job No. 550 JAVG. = #VALUE! MPI DEPTH TIME START END CHANGE MPI RATE 20 20 20 6.25 11,00 12.25 11.00 12.25 13.00 4.75 1.25 0.75 4 16 27 40 V1 H2O NIA 20 13.00 13.75 0.75 27 20 13.75 14.25 0.50 40 20 14.25 14.75 0.50 40 2 20 6.00 7.25 1.25 16 80 H2O @ NIA 20 7.25 7.75 0.50 40 20 7.75 8.25 0.50 40 20 8.25 8.50 0.25 80 20 8.50 9.00 0.50 40 20 9.00 9.25 0.25 80 3 8 10.00 empty #VALUE! #VALUE! #VALUEI H2O @ NIA 20 0.00 #DIV/0! 20 0.00 #DMO! 20 0.00 #DIV101 20 0.00 #DIV/O! 20 0.00 #DIVIO! 4 20 0.00 #DIV101 #DIV101 H2O @ NIA 20 0.00 #DIV10! 20 0.00 #DIV/01 20 0.00 #DIV/0! 20 0.00 #DIV/O! 20 0.00 #DIV/01 5 20 20 20 0.00 0.00 0.00 #DIV/O! #DIV/O! #DIV/0! #DIVIOI H20 @ N/A 20 0.00 #DIV/b! 20 0.00 #DIV/01 20 0.00 #DIV101 Job No. 550 JAVG. = #VALUE! MPI ISDS DESIGN CALCULATIONS - for Pitkin Owner's Name re . ,. _ Parcel ID # Perc Rate PSM (T) Design Flow (Q) = # potential bedrooms X 2 people/bedroom X gpd X 1.5 Q= 900 Minimum tank capacity 1125 gallons Absorption Area (=Q/5 X SQRT perc rate)(1.4 loading factor) A = 2,254 sq. ft. of absorption area required Absorption Area (=Q/5 X SQRT perc rate) WITH SECONDARY TREATMENT (no loading factor) A= 1,610 sq. ft. of absorption area required Abs. Area w/ loading factor (B25) 2254 SF 1680 Sf Trench Bed 30% Dosing/Chambers Red= Quick4 Trench Quick4 Bed Pipe and Gravel (-10%) 2029 no red. 2254 206 228 Dosing (-20%) 1803 (20%) 1803 183 183 Chambers (-30%) 1578 (-10%) 2029 160 206 Max Allowable (-50%) 1127 (-30%) 1578 114 160 Secondary Treatment Abs Area w/ out loading factor (1328) Trench Bed Pipe and Gravel (-10%) 1449 no red. 1610 147 163 Dosing (-20%) 1288 (-20%) 1288 130 130 Chambers (-30%) 1127 (-10%) 1449 114 147 Max Allowable (-50%) 805 (-30%) 1127 82 114 100 SETBACK FROM WELL # of feet = 50 SETBACK FROM POND, STREAM OR IRRIGATION DITCH # of feet = 25 SETBACK FROM DRY GULCH # of feet = Req Min Bed Area= Exist Drip bed Area= 2254 SF 1680 Sf Remaining Treatment Area Req= 574 SF 30% Dosing/Chambers Red= 401.8 SF # Chambers required= 402/9.2= 43.67 Rnd 44 # Chambers Used= 52 ------------- d s E 3m�a N„=m o MARTAYAN RESIDENCE LOT OD DIVISION �� F 9 S 06DO N'ORTH STARWOOD DRIVE PITION COUNTY COLORADO p s A N + d mem "W S MARTAYAN RESIDENCE � pAy in[o LOT ST SUBDIVISION 8 060D0O N NORTHH STAR WOOD DRIVE � w a S PITKIN COUNTY COLORADO v om" m ° o $ N per_ o MARTAYAN RESIDENCE LOT ST SUBDIVSION T $ § N i m a S 06DO NORTH STARWO PITgN COUNTY COLORADO °