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HomeMy WebLinkAboutpitkin.eh.264335401005 (2005)Pitkin County Environmental Health Department Permit for an Individual Sewage Disposal System 0405 Castle Creek Road, Suite 10, Aspen, Colorado 81611 Phone 970-920-5070 / FAX 970-920-5077 Permit # 05001 Parcel ID # 2643-354-01-005 Type of permit New( X) Repair( ) Addition/Remodel to House( ) Name of Owner Crandall, Rick Street Address 150 Larson Drive Property legal description Lot R-99, Blk 16, Starwood Size of lot 2.4 Total square footage of the house 8,152 Water source Starwood community system # of bedrooms in house 3 # of offices, lofts & similar sized rooms in house 2 Caretaker unit attached Total square footage of the caretaker unit 957 # of bedrooms in caretaker unit 1 # of offices, lofts & similar sized rooms in caretaker unit Designed for what # rooms (list) SIX (6) = 3 Br's+bedroom/exercise+office+caretaker unit Permit information Designed by Church & Associates Mailing Address 4501 Wadsworth Blvd Wheat Ridge CO 80033 Perc rate 71 Profile hole depth 9 ft Depth to groundwater or bedrock > 9 ft Minimum Septic tank capacity 3413 gallons Minimum Absorption area 9120 sf (drip) Comments Septic permit approved per compliance with the engineer design and specifications dated, November 16, 2004. Any changes must be approved by this department and the design engineer prior to them being made. Minimum horizontal distances between components of the system and physical features shall conform to the Pitkin County ISDS regulations. The design is for one 2000 gallon single compartment concrete septic tank followed by one 2000 gallon concrete two compartment tank with an effluent pump in a Biotube pump vault. The drain field is 9120 sq ft of drip irrigation, twelve 8ftX 95ft sections. This department does not endorse any brand of products. 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. This department must also be called for an inspection with a minimum of 48 hours advanced notice. *Revegetation over the area of the field is very important for the functioning of the system. Pitkin County has guidelines that must be followed to assure the plants that are introduced are appropriate for the conditions of the area. The use of native plants is strongly encou Permit approved by: J dL Date:` , Plans and specifications of the roposed individual Z;:sposal system have been reviewed and are considered satisfactory. Permission is hereby granted to the owner or the agent to perform the work indicated in accordance with the Pitkin County ISDS Regulation in effect at the time of issue. This permit becomes invalid 6 months from the date that the permit was issued unless system construction has commenced or an extension has been approved in writing by the Department. As -built drawingsust be included with this Installer: CNJ aC:g before the final approval will be issued. Final approval:(� P1 Y"1 OL f -x C Date: PITKIN COUNTY ENVIRONMENTAL HEALTH DEPARTMENT APPLICATION FOR INDIVIDUAL SEWAGE DISPOSAL SYSTEM 0405 Castle Creek Road, Suite 10, Aspen Colorado 81611 Phone (970) 920-5070 Fax (970) 920-5077 Name of OWNER Ck C12r41Vi Owner's Mailing Address Go/ E. T'&kAVE 5?E 20Z City, State, Zi A -SPE NJ Business Phone: q7Q 20 907 Home Phone: E-mail Address: Primary Contact Person (all communication regarding this permit will go through this person) Name Company Contact Mailing Address Q0 -,67-K tj!dA AW City, State, Zip(? Business Phone: VZ1 Cell Phon : Fax: l 7E -mail Address: „J? (D C0,0 Ij=j=F.Cj Parcel ID # (available from assessor's office [� at 920-5160 or at www.pitkinassessor.org ) 2- (e_] _ - —35— L- Street address of property 0150 LA-RSQti! J�QkVL Legal Description: LoR� �� Lot 1 ,Block_ ,Filing Subdivision ./Xj�l Size of lot: 2041 acres. Type of proposed structure: cS14ZLC -FiPtktijLV ktE Ibffr4)77/N Total square feet of house DI 1152- Caretaker 152Caretaker Unit: Attached Detached Total area(sq. ft.) of caretaker unit # of bedrooms (potential) in house # of bedrooms (potential) in caretaker unit Permit is for: New Home V--� Repair due to failure ( ) Remodel/Addition ( ) Emergency use ( ) Water: Private well ( ) Spring ( ) Stream ( ) Community/Public Water System (G} If community system: Name of system The fee for a ISDS application is $600 for a permit that takes 6 hours or less for the department to approve. If approval takes longer than 6 hours, a rate of $100 per hour will be charged. The maximum fee is $1000. The basic fee of $600 is due at the time of application. The remainder, if any, will be due in two stages: first, at the time of issuance of the ISDS permit; second, before final approval of the ISDS permit. Application for an individual sewage disposal system is hereby submitted. I hereby certify that the above information is true and accurate and that I have provided true and accurate information on locations of all existing and proposed wells, contour intervals, buildings, property lines, ditches, slopes, waterlines, springs, suction or irrigation lines, drinking water cisterns, drain tiles, irrigation ditches, lakes, water courses, streams, floodplains, dry gulches, and existing septic systems. I hereby certify that any such features not shown on attached site map are not present. Issuance of the permit does not imply the approval of any other permit required for construction pursuant to Pitkin County codes. No constructiorUmiy be, ddertaken until all approvals and permits have been obtained. LL004 The Pitkin County Environmental Health Departmen should the individual sewage disposal systeP fail or the applicant or his/her representgUvis.,T,h owner/ Signature of applicant Received by G:\isds\isds applic\isdsapp rev050103.doc County and employees of these agencies will be held harmless ;tion. The permit to construct is i§sO�&'olih&rmation submitted by s fulkresponsibility in case of failure of the system. Date Receipt # Date !2 "k TABLE II TABLE OF MINIMUM HORIZONTAL DISTANCES IN FEET BETWEEN COMPONENTS OF A SEWAGE DISPOSAL SYSTEM AND PERTINENT PHYSICAL FEATURES NOTE: The Department may require greater distances where warranted. For repair or upgrading of existing systems where the size of the lot prevents meeting these distances, the repaired facility may not be closer to water supply components than the existing facility. (1) Crossings from these distances may be permitted if the drinking water or wastewater pipe is encased for at least ten (10) feet on each side of the crossing or place where components are closer than specified in the table. Pipe of Schedule 40 rating or better must be used, of sufficient diameter to easily slide over and completely encase the line. Ridged end caps of at least Schedule 40 rating must be glued or secured in a watertight fashion to the ends of the encasement pipe. There must be a hole of sufficient size to accommodate the pipe in the lowermost section of the ridged cap so that the conveyance pipe rests on the bottom of the encasement pipe. The area in which the pipe passes through the endcaps must be sealed with an approved underground sealant compatible with the piping used. (2) Add 8 feet additional distance for each 100 gallons per day of design flow over 1000 gallons per day as specified in the table, unless it can be demonstrated by an RPE or geologist that a mechanical or natural barrier will prevent contamination. G:\isds\isdsapplic\isds TABLE II-opt2.doc Dwelling Property Lines, drain Lake, Water Spring, Wells, Drinking Water Drinking Water Occupied titles, Piped, Lined or Course, Irrigation Dry Gulches Septic Tank Suction Lines Supply Line (1) Supply Cistern Building Intermittent Irrigation Ditch or Stream Ditch Absorption Trench, Seepage Bed, Sand Filter, Sub -surface 100 25 25 20 10 50 225 6 Dispersal System or Drywell Seepage Pit (2) 50 25 20 25 6 50) 25) Lined Eva po rtra nspi ration Field 60 10 25 15 10 + 25 10 5 or Lined Wastewater Pool Unlined or Partially Lined Evapotranspiration System Wastewater (2) 25 25 15 10 , 25 15 10 Pond, or Surface 100 Disposal System Other than Aerosol Lined Sand Filter 60 10 25 15 10 ' 25 10 5 Unlined Sand in Soil With a Perc Rate Slower than 100 25 25 15 10 25 15 10 60 minutes per inch Dispersal System Using (2) 10 50 125 10 (2) (2) 10 Aerosol Method 100 25 10 Vault Privy 50 10 25 15 10 25 10 - Septic Tanks, Treatment Plants, Dosing Tanks, 50 10 25 5 10 50 10 - 4 Vaults Building Sewer or 50 10 25 0 10 50 10 - Effluent Lines 1 NOTE: The Department may require greater distances where warranted. For repair or upgrading of existing systems where the size of the lot prevents meeting these distances, the repaired facility may not be closer to water supply components than the existing facility. (1) Crossings from these distances may be permitted if the drinking water or wastewater pipe is encased for at least ten (10) feet on each side of the crossing or place where components are closer than specified in the table. Pipe of Schedule 40 rating or better must be used, of sufficient diameter to easily slide over and completely encase the line. Ridged end caps of at least Schedule 40 rating must be glued or secured in a watertight fashion to the ends of the encasement pipe. There must be a hole of sufficient size to accommodate the pipe in the lowermost section of the ridged cap so that the conveyance pipe rests on the bottom of the encasement pipe. The area in which the pipe passes through the endcaps must be sealed with an approved underground sealant compatible with the piping used. (2) Add 8 feet additional distance for each 100 gallons per day of design flow over 1000 gallons per day as specified in the table, unless it can be demonstrated by an RPE or geologist that a mechanical or natural barrier will prevent contamination. G:\isds\isdsapplic\isds TABLE II-opt2.doc ,%W %No ASPEN/PITKIN ENVIRONMENTAL HEALTH DEPARTMENT ISDS DESIGN CALCULATIONS Owner's Name Parcel ID #` „�� House Size (sq. ft.) mom (75 gpd, 100 gpd, or 130 gpd) 130 Number of Bedrooms in Main House Number of Offices, Libraries, Studies, Similar -sized Rooms in Main House Number of Bedrooms in Detached Caretaker unit 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 1560 State Review Required? no Perc Rate �= (T) APPLICATION RATE = AR = 0.30 GAL/SF/DAY Design Flow (Q) = # potential bedrooms X 2 people/bedroom X gpd X 1.75 Q= 2730 Absorptior Area (A= Q/AR) A = 9100 sq. ft. of absorption area required N/A infiltrator units without reduction A maximum 50% reduction is allowed for use of deep gravel or gravelless chambered system, only if the lot size and soil conditions are optimal. If a reduction is being proposed, describe why lot size and soil conditions are optimal: 50% REDUTION TAKEN FOR GOOD PERCOLATION RATES AND USE OF GRAVELLESS CHAMBERS A = N/A sq.ft. with reduction N/A infiltrator units with reduction Type of system: []Absorption trenches []Absorption bed [] Gravelless chambers []Dry well []Seepage Pit [X]Other - SHALLOW -TRENCH DRIP IRRIGATION Minimum tank capacity 3413 gallons SETBACK FROM WELL # of feet = 238 SETBACK FROM POND, STREAM OR IRRIGATION DITCH # of feet = 188 SETBACK FROM DRY GULCH # of feet = 163 FINAL INSPECTION BY: DATE: L*1 C Engineer's Submittal for Septic Permit in Pitkin County Owner's Last Name: CRANDALL Location: 150 LARSON DR Summary of information regarding new septic system: Type of system being proposed: SHALLOW -TRENCH DRIP IRRIGATION Other treatment processes being used: EFFLUENT FILTER Does the system use any mechanical parts? (Prohibited unless there is no alternative) YES If yes, explain why there are no alternatives A PUMP IS REQUIRED TO DOSE THE FIELD AND DUE TO TOPOGRAPHIC DIFFERENCES Does the system require any maintenance other than routine pumping? YES If yes, who will do the maintenance? CLEAN FILTER WHEN SEPTIC TANK IS PUMPED Are any reductions being proposed? NO If yes, what makes the lot and soil conditions optimal? Which of the following are on the site or within setbacks? Closest distance of septic system to each feature [] 100 year floodplain N/A IL [] well(s) N/A [] irrigation ditches N/A [] streams N/A [] ponds [] other N/A What was the profile hole depth? 9 FEET What is the depth to groundwater? N/A What is the depth to bedrock? INA What assumptions, if any, were made in system sizing and design? (Include any local, site- specific data, such as months without snow cover, ratio of evaporation to absorption, etc. that are relevant.) If there are any variations from normal design, please explain how they can be demonstrated to improve treatment and protect water quality. NONE 0 den / Pitkin Environmental Health Departr. Contact Log Sheet Date Person Spoken To Comments / Action to be Taken Initials (Time Alicia Gomez From: Alicia Gomez Sent: Thursday, February 09, 2006 8:34 AM To: Ed Church Subject: RE: Installation Observations you were looking for Ed, l-tere are the reasov�.s why Uou were sevit Wed As-guLLt^ Letters for those three propertLes: --PaLeU, Pervu.Lt 02004, 2043-292-00-000: You were supposed to roet bade to us regardLng whether or not the f�eLd was haLf on - half off or aLL ow Lw earLU Zoos (vote dated 3/22/00. ALso, we havenit receLVed the p%ctures from the LvstaLLatLM. as EWNR was not rC(Ued out fora -i-RL LnspectLon. we stUl, weed those pLctures --WeLtz, PermLt 03000, 2645-223-20-002: Avi, e-n&PU from Nand to Uou dated 4/4/o,5 states that we need a "Letter that Uou. had dove a fLnaL LvwspectLovw and weed a new as-&, LLt drawLVLO SLnce tnvwle LocatLon was chanced and the pLping had to be corrected, --weLLs, Pervi Lt 04042, 2735-2r02-02-002: ,4n e-VIOU from Nand to Uou dated 2/7/05 states that ^the 3rd as-bAUt Letter [She wast revLewLno has the same probLevu. - Uour statevu.evt that the pu.vwp vauLt and puvvp Uvue had not been LwstaUed and that Uou wi,ust Lvwspect Lt. so we canit accept this as an acceptabLe ^as-buLLt^ Letter., i spolze wLthjoe weLLs UesterdaU as he aoLLed Ln respovwse to the Letter that I had sent ki vn&, as weLL avd he saLd that the pump avwd pump vauLt are stUl, not LwstaUed. Fte Ls tool-zLve at 0ettLvr) the puvup sUstew, , LvstC(Ued Lw the sprLng. As such, I Lwformed Km that whew that happens, fou weed to be contacted to Lwspect Lt and thew Uou wU weed to wr%te a new "RS-bLCUt^ that saUs Uou Lnspected Lt and Lt's aLL 0Z (Lf, Lwdeed, Lt Ls) TkLs shouLd be enouoh Lnforvu.atLov�, for fou to be abLe to re-wrLte those Letters and re-submt t as-10RUts to as. if, however, fou have ani oddLtLonaL CovCerns, pLease feeL free to Ether e-mPU us 200Ln, or,3We us a CaCC at 9y,o:920-5070. ALLbLP EFt/ NR X5027 -----OrbaaL aL Messaee----- Frovu.: Ed church IwtaLLto:echurch@cowc.Lnfol sent: wednesdo�, February 08, 2000 2:53 PM To: AUCs a c,omez sublect: InstnLLatLon ObservatLons fou were Lool6v-o for �tLLCLa, /, I beUeve three of the four I NOB Letters have 0061Ln been sent to fou. The onL� owe vot covupLeted Ls Pervu.Lt o5oo2, as we a re woLtL for power to be connected to checlZ the pump setup. Thls Ls of 250 L Rrsovi, Drlve. parceL ip i 2vut�cCpate oett�we that douse �w wrak. ED cFt�krzc�t, P.E. 0v�Site wastewater covUSLcltavlt5 720-898-343.4 erk,crck@cowc.�v fo «Ed CkL rrk (E-vl&t2U).vcf>> FEB -16-2006 11:17 R J W BUILDERS 970 920 7846 P.01i02 R1 BUILDERS, INC. 215 South Monarch Street, Suite G103 Aspen, Colorado 81611 Off: 19701920-7919 Fax: (970)920-7846 TO: Environmental Health & Natural Resources ATTN: Alicia Gomez RECEIVED FAX #: 920-5077 FEB 1 6 ZUU6 PIMN COUNTY ENVIRONMENTAL RE: ISDS Permit HEALTH & NATURAL RESOURCES FROM: Christy Harding If you do not receive all of the pages, please call (97Q)920-7919 Date: 2/16106 Time: 11:30 AM Total pages including cover: 2 REMARKS Alicia, Attached is a response to your letter dated February 6, 2006. Please let me know if you have any questions. Thanks, Christy FEB -16-2006 11:17 R J W BUILDERS 970 920 7846 P.02i02 Rj0 W BUIDERs, arc. 215 South Monarch Street, Suite # G-103, Aspen Colorado 81611 Office: 970-920-7919 Fax: 970-920-7846 Bob Witek's Cell: 379-7555 E -Mail Address: rwitek@aol.com February 16, 2006 CltI� Alicia Gomez H� H¢0UM, Z�pb Pitkin County Environmental Health & Natural Resources �TURq�RFSN,yFNT 0405 Castle Creek Road, Suite 10 on, Z Aspen, Colorado 81611 Dear Ms. Gomez, We received your letter regarding the Individual Sewage Disposal System Permit for Parcel ID # 2643-354-01-005, 150 Larson Drive, Starwood Subdivision. We are aware that you need an "As Built" letter for our engineer. We have spoken with Ed Church from Church OWC, LLC and he has scheduled the final septic inspection for this site during the second week of March. Unfortunately, this is past the deadline of February 20, 2006 that is mentioned in your letter. Please be aware that we are working on this issue, and it will be taken care of as soon as Mr. Church can do the final inspection. If you have any questions, regarding this letter, please call us here at 920-7919. Sincerely, Christy Harding RJW Builders TOTAL P.02 P. 1 * * COMQ CATION RESULT REPORT ( MAY. 10.20 8:59AM ) * * * FAX HEADER: ENVIRO HEALTH NAT RESOURCE TRANSMITTED/STORED : MAY.10.2006 8:57AM FILE MODE OPTION ADDRESS RESULT PAGE ----------------------------------------------------------------- -- ----------------- 207 MEMORY TX 9204557 OK 2/2 CHURCH OWC OK 2/2 ------------------------------------------------- REASONFOR ERROR E- 1) H AN G Up OR LINE FAIL - E -3) A I L E- 3) NO A N S W E R ------------------------------------------------ E-2) BUSY E- 4) NO FACSIMILE CONNECTION PITKIN COUNTY ENVIRONMENTAL HEALTH & NATURAL RESOURCES DATE: 5/10/20.06 Send to: Matthew Tracy From: Alicia Gomez Fax Number: 920-4.557 Phone Number. 920-SO87 CC_ Church OWC, LLC Number of Pages, Including Cover: 2 CC Fax Number: 720-898-3434 0 URGENT o REPLY ASAP ❑ PLEASE COMMENT C] PLEASE RFVIEW O FOR YOUR INFORMATION COMMENTS: Septic Permit # 05001 for parcel 2643-35401-005, owner Crandall, has been finalized. Please feel free to call 920-5070 if you have any questions. fax cover Pitkin County Environmental Health and Natural Resources 0405 Castle Creek Road Suite #10, Aspen, CO 81611 Phone (970) 920.5070 1 Fax (970) 920.5077 Web site www.aspenpitkin.com/ehnr CHURCH OWC, LLC Onsite Wastewater Consultants March 20, 2006 RJW Builders Inc. Attention: Bob Witek 415 East Hyman Avenue #205 Aspen, Colorado 81611 Subject: OWS Installation Observations 150 Larson Drive Lot R-99, Starwood Village Pitkin County, Colorado Job No. 10778 Pitkin County Permit # 050001 Mr. Witek As requested, CHURCH Onsite Wastewater Consultants, LLC (COWC) performed a site visit to observe the installation of the onsite wastewater system (OWS) at the subject site. CHURCH & Associates, Inc. prepared an OWS design report under Project No. 10778 dated May 16, 20041. Three site visits were performed in July and August 2005 during installation of the field. The drip irrigation fields were installed with a small excavator. The field was installed similar to the plan presented on Figure 1. A site visit was performed on March 9, 2006 to observe the pump system. At the time of the site visit, the sewer pipe, septic tank with biotube effluent pump, were installed. The control panel alarm will be under the stairs at the southwest side of the home, allowing visual contact with the pump. The observed components of the OWS appeared to be installed in general conformance with the CHURCH/InTEC OWS design, plans and specifications. Our installation observation does not imply a guarantee or warranty of materials or workmanship. The OWS design figures have been revised to reflect the final location of the OWS at the subject site. If we can be of further service, please call. Sincerely, CHURCH Onsite Edward 0. Church, P.E. Attachment 3 copies sent RECEIVED MAR 2 8 2006 PITKIN COUNTY ENVIRONMENTAL HEALTH & NATURAL RESOURCES Copy to Charles Cunniffe Architects, ATTN Matthew Tracy, 610 East Hyman, Aspen, CO 81611 P.O. 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Ja� N � Q 3 tX 1 C - - ', `,�cr t r�� l �..- t t �'� y \Ry,+ ` �. �' 't'n._}1 ",• y,F' i!i \ - G=� l I - Alt IL � I 10 1, 4 WA fr+Aar 6E - 141M 70 7;!, viot �t vvw f I1 i f I1 r� _ G� Rte•. c+ ' �r ba _ _._ •'. 1_ Ye .• 1..\ i Zl 14 i �+m. -1 Y r p i r .�,�' ' �, - � <., �- ,� w ;e ,EA � .. s � _ �' f, ��_' `mom: � _ - -. --__ > ; ., _- -- �� . - � � ,�-} `1 ��� _ �'� �� - ,� � - � � .�''�.� I� l,� � I � \ - 1 f - � �-, - � • �' � ���= : �.� �_ ,. - - 'g � � a �- � LOT R-9 ' ...r 150 LAR�ON DRIVE STARWOOD VILLAGE PITKIN COUNTY, COLORADO OBSERVATION/ VENT PIPES (TYP.)--, L. N 000-GALLO , SIN -COMPARTMENT, NCRETE S PTIGLEC TANK FOLLWED BY 2 00 -GALLON, TWO-COMPARTMENT, CO CRETE SETIC TANK WITH A BIO UBE(TM) P MI VAULT IN THE SEC ND COMPA TMENT Eo Eel m JOB NO. 10778 n MIN. O IN • 0' SETBACK TO DRAIN\ - FIELD N 4" SEWER LINE WITH CLEA"JOJT K _1 9120 SF- Or INI-IL I RAI IVL ARIA INA SHALLOW -TRENCH DRIP IIRIGATION DRAIN FIELD. THE DRAIN FIELD MUST HAVE TWELVE 8 -FOOT BY 95 -FOOT SECTIONS. PROPOSED 6 -BEDROOM RESIDENCE AS --BUILT LOCATION OF OWS DISTRIBUTION VALVES \ ;2" PUMP LINE WITH AIR RELEASE VALVE AT HIGH POINT PROPOSED DRIVEWAY FIGURE 1 I!] Alicia Gomez From: Ed Church [ech u rch@cowc. info] Sent: Wednesday, February 08, 2006 2:53 PM To: Alicia Gomez Subject: Installation Observations you were looking for C Ed Church E-mail).vcf (925 B).,AL�c�a, I beLLeve three of the four I Nog Letters have beeA. newt to fou. The ovUL owe "t OMtu .tteal tsi rntbi 0500:1 as we are w,2k%v e for power to be cowweeted to check, the puvup setup. Phis Ls at 250 Lorsov, DrLve. pareeL ID 2 43-354 -02-005. 1 awtLcCpate gettiv�,g that dove i- march. >✓D c, -+L, Rci-t, T>. E. cHKR-cR i+ ovLsite wastewater eovisuLtavLts 720 -29R -S434 echuroh@cowc.i. fo «>✓d Church (E-vt&P L).vr f>> go Lvc)�13-� February 6, 2006 Matthew Tracy Charles Conniffe 610 East Hyman Aspen, CO 81611 Re: Parcel ID #: 2643-354-01-005 Property Address: 150 Larson Drive Legal Description: R-99, Block 16, Starwood Subdivision Permit #: 05001 Dear Mr. Tracy: This letter is to advise you that the Pitkin County Environmental Health & Natural Resources Department has not been able to final the Individual Sewage Disposal System (ISDS) permit for the above stated residence/property. It is mandatory that this office receives an "As Built" letter from the engineer who designed the system. The letter will confirm that they observed the installation of the system as designed. Any changes to the system must be noted in the letter or by a new set of plans. We cannot sign the Certificate of Occupancy for this property without the "As Built" letter. This office must receive the "As Built" letter from the engineer no later than February 20, 2006. Please contact me with any questions. Thank you, in advance, for your help and cooperation in this matter. Sincerely, Alicia Gomez Administrative Assistant Environmental Health & Natural Resources cc: Church OWC, LLC 4501 Wadsworth Blvd Wheat Ridge, CO 80033 01 V Rick Crandall 601 E. Hopkins Ave. Suite 202 Aspen, CO 81611 Pitkin County Community Development 0 CHURCH November 16, 2004 Associates, Inc. ENGINEERS & GEOLOGISTS Rick Crandall C/O Charles Cunniffe Architects, Attn: Matthew Tracy 610 East Hyman Avenue Aspen, Colorado 81611 Subject: Revised OWS Design, Proposed Crandall Residence 150 Larson Drive Lot R-99, Starwood Village Pitkin County, Colorado Job No. 10778 Mr. Crandall, As requested we have prepared a revised onsite wastewater system (OWS) design for the subject property. The revisions are based on a change to the number of bedrooms from our latest revised design, dated May 30, 2002, under Job No. 10778. All previous designs should be discarded to avoid confusion. CHURCH & Associates, Inc. (CHURCH) performed subsurface investigations on April 22, 1999 and April 16, 2002. SITE CONDITIONS The site is a 2.4 -acre lot located in Starwood Village, Pitkin County, Colorado. The lot is presently vacant. The slope at the proposed field area is 40% to the southwest. The ground has a full cover of scrub oak and small evergreens. Water is provided to the site by the local water district. The proposed drain field site is not in a confined drainage area and has moderate solar and wind exposure. The site is suitable for use of a drip irrigation or evapotranspiration -absorption (ETA) OWS. PROPOSED CONSTRUCTION A six -bedroom residence with a living area greater than 6000 ft2 is proposed at the location indicated on Figures 1 and 2. The OWS was sized based on 6 bedrooms and 1560 gallons per day (GPD) using Pitkin County Environmental Health Department (PC� ) loading of 130 GPD per person. The sewage loading with a peaking factor of 1.75 is 2730 GPD. Loading includes washing mach es and garbage grinders. If additional bedrooms in unfinished areas are possible, it is suggested that the OWS be constructed to handle the additional loading. The installation of a properly engineered OWS to serve future build -out can be cost effective. DENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 www.geo-church.com 303.463.9317 Fax: 303.463.9321 Toll Free -1.877.248.3123 W SUBSURFACE CONDITIONS 42 Revised OWS Design Job No. 10778,11/16/04 Page 2 Subsurface conditions were investigated by drilling two profile borings and 15 percolation holes. Subsurface materials encountered in the Profile -1 consisted of sandy, gravelly clay, with sparse large boulders, to the maximum depth explored of 9 feet where refusal was encountered. Subsurface materials in Profile -2 consisted of 9 feet of sandy, gravelly clay, with sparse large boulders, underlain by sandstone bedrock to the maximum depth explored of 10 feet. The percolation tests indicated rates of 20 to 120 minutes per inch. The OWS design is based on the percolation rate of 71 NW1, which has a corresponding application rate of 0.30 gal ft /day. We are designing OWS based on percolation holes 1 through 6 and 12 through 15, which are in the area of the proposed drain field. Percolation and subsurface investigation results are presented as Table 1. RECOMNWNDATIONS The OWS should be installed as indicated on Figures 2 through 4. The OWS includes two septic tanks with an effluent pump and a dosed shallow trench drip irrigation drain field. The OWS is designed on an application rate of 0.30 gal/A2/day and a sewage loading of 1560 GPD. The OWS installation must include one 2000 -gallon, single -compartment, concrete septic tank followed by one 2000 -gallon, two-compartment, concrete septic tank with an effluent pump in a Biotube® pump vault in the second compartment. Pump specifications are presented as Figure 5. The drain field installation must include 9120 ft2 of drip -irrigation drain field in twelve 8 -foot by 95 -foot sections as presented on Figures 2 and 3. Configuration of drip irrigation fields can be modified to fit the topography and preserve existing vegetation where possible. The trenches should be backfilled to reestablish the original slope. Grading and/or retaining structures may be needed in drain field areas to achieve required drain field depths. If this occurs, the topsoil should be removed prior to grading and replaced to promote revegetation. The surface of the drip irrigation field should be continuously vegetated after installation of the system. Added hydraulic loading from an automatic irrigation system may reduce the life of the drain field. OPERATION AND MAINTENANCE The owner must realize an OWS is different from public sewer service. The owner must assume responsi- bility for maintenance of the system. The system is relatively maintenance free, but the owner must have the septic tanks pumped and filters cleaned (hosed off). It is recommended the tank be pumped and filter cleaned every two years. There are daily considerations, such as not putting plastic or other non -bio- degradable material into the system. Water use must be monitored so toilets are not allowed to run when seals malfunction. To illustrate the point, a running toilet will consume in excess of 1000 gallons per day if allowed to flow. An excess 1000 GPD loading could flood and irreparably harm the field. We caution against installation of a water softener. The loading from the backwash of a water softener can be detrimental to OWS and a separate drywell should be constructed for the backwash waste, if a water softener is installed. No plastic should be used over the field, which will reduce evapotranspiration from the field. Chemically treated water from a swimming pool or spas should not be introduced into the OWS. LBMATIONS A drip irrigation design requires installation by a contractor who is an experienced installer. Our investigation, layout, design and recommendations are based on data submitted. If subsurface conditions W Revised OWS Design Job No. 10778, 11/16/04 Page 3 ® different from those described are encountered, we should evaluate the effect of the changes on the proposed OWS. If the health department makes modifications to this design, CHURCH should be contacted to evaluate the impact on the performance of our OWS design. 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 ISDS regulations. The installer of the system is to have demonstrated knowledge of the ISDS regulations and requirements. If there are questions or if we can be of further service, please call. Sincerely, CHURCH & Associates, Inc. Eric R. Burns Design Technician EOC/erb 4 3 copies sent via FedEx I PP��O RFG�ST Reviewed by:''`b '�h% •;°9 Edward O. Ch . AL 's, VICINITY MAP RESIDENCE %IW, SITE R -q9 _AR50N DRIVE I LOT H-99 150 LARSON DRIVE STARWOOD VILLAGE PITKIN COUNTY, COLORADO c 0 Z 0 LN � 9 Fp F, F� F FS F Fj 0 o p O O p u' vV\ i vv\\1 +71\ \ \ \ , ,14 \ 3\ \ \ fkR L 41 1 ��f -5 \ op -o PROPOSED 01.-7 6 -BEDROOM QP�8 RESIDENCE PROFILE -2• `p 9 ' QP -10`. op -11 PROPOSED DRIVEW.D.Y I I _ � s SITE PLAN AND LOCATION OF PERCOLATION HOLES JOB NO. 10778 -,ALE 1"=40' 11/16/04 REVISED FIGURE 1 LOT R 9�\ \ 1"=40' 150 LARSON DRIVE \` STARWOOD VILLAGE` \ IW P OPEIRT`Y _PITKIN COUNTY, COLORADO LINE TB C OBSERVATION/ VENT PIPES (TYP.) ° \ \ \ \ \ \ S \ \/-9120 SF OF INFILTRATIVE AREA IN A o \ \ \ SHALLOW -TRENCH DRIP 11RIGATION \DRAIN FIELD. THE DRAIN FIELD MUST 'HAVE TWELVE 8 -FOOT BY 95 -FOOT SECTIONS. DISTRIBUT11 N VALVES 0\ O`` \ \ \N 2" PUMP LINE WITH AIR RELEASE VALVE AT HIGH POINT \ \ \ 2", PVC 'HEADER \ \0' SETBACK TO DRAIN' \ \ FIELD 5" MIN. "o 0 4" SEWER LINE WITH CLEANOUT (e5 x PROPOSED DRIVEWAY 2000 -GALLON, SINGLE -COMPARTMENT, CONCRETE SEPTIC TANK FOLLWED BY 2000 -GALLON, TWO-COMPARTMENT, CONCRETE SEPTIC TANK WITH A BIOTUBE(TM) PUMP VAULT IN THE PROPOSED 6 -BEDROOM SECOND COMPARTMENT RESIDENCE 0 0 LOCATION OF PROPOSED OWS 11/16/04 JOB NO. 10778 REVISED FIGURE 2 0 TYPICAL PLAN VIEW HEADER GRAVITY FLOW MINIMUM 1/8"/l' 2" PVC HEADERS FROM DISTRIBUTION VALVES DISPERSAL LINE LEVEL MANIFOLD 12 DISTRIBUTION VALVES _(2" BALL VALVES) 2" PUMP LINE WITH AIR RELEASE VALVE AT HIGH POINT NO. ISECTION LENGTH 1 WIDTH LINES 12 1 A 95' 1 8' 4 2" CLASS 200 PVC PIPE WITH 1/4" HOLES ON 8" CENTERS (HOLES FACE DOWNWARD) INSTALL DISPERSAL LINES LEVEL 95' LINES TO ADDITIONAL SECTIONS SPECIFICATIONS AND DESIGN CALCULATIONS 2' SPACING 2' SPACING 2" PVC VENT PIPE 8' SECTIONS I YPICAL FIELD CROSS-SECTION r, 30" -PIPES / 12" 2, 2" PVC VENT PIPE �- WITH CAP AND 1/4" HOLE -------__,,---GROUND SURFACE TYPICAL DETAIL OF DISTRIBUTION VALVES - N.T.S. / DISPERSAL LIN 2" PVC LINE FROM PUMP CHAMBER WITH AIR RELEASE VALVE AT THE HIGH POINT 2" PVC LINES TO SECTIONS THE DISTRIBUTION VALVES CONTROL FLOW OF EFFLUENT TO EACH SECTION OF THE FIELD. WE RECOMMEND THAT ONE SECTION OF THE FIELD BE CLOSED AT ALL TIMES TO ALLOW DRYING OF SEGMENTS OF THE FIELD TO EXTEND THE LIFE OF THE FIELD. THIS CAN BE ACCOMPLISHED BY SEQUENTIALLY ROTATING THE VALVES EVERY YEAR. JOB NO. 10778 PUMPS SHOULD BE SET AT 200 GALLON DOSE PUMP SPECIFICATIONS - SEE FIGURE 5 SHALLOW TRENCH DETAILS 11/16/0, REVISD FIGURE DRAIN FIELD SPECIFICATIONS TREATMENT UNIT SPECIFICATIONS DESIGN CRITERIA STRUCTURE = 4 -BEDROOM RESIDENCE PROPOSED AREA = 9120 SF TOTAL MINIMUM CAPACITY = 1.75 X Q X (30 HOURS/24 HOURS) = 3413 GALLONS >6000 SF LINEAL FOOTAGE = 4560 FEET MINIMUM LOADING = 130 GPD PER PERSON NUMBER OF SECTIONS = 12 RECOMMENDATIONS - 2000 -GALLON, SINGLE -COMPARTMENT, CONCRETE SEPTIC AVERAGE LOADING = q = 1560 GPD WIDTH OF EACH SECTION = 8 FEET TANK FOLLOWED BY 2000 -GALLON, TWO-COMPARTMENT CONCRETE SEPTIC TANK PERCOLATION RATE = t = 71 MPI LENGTH OF EACH SECTION = 95 FEET WITH AN EFFLUENT PUMP IN A BIOTUBE(TM) PUMP VAULT APPLICATION RATE = AR = 0.30 GPD/SF AREA PER SECTION = 760 SF AREA = (1.75 X q) / AR ,% TRENCH WIDTH = 2 FEET ALARM AND CONTROL PANEL TO BE LOCATED AT OWNER'S REQUEST MINIMUM AREA REQUIRED = 9100 SF LANDSCAPE WITH XERISCAPE GRASS DRAINBACK TO TANK AND FIELD JOB NO. 10778 PUMPS SHOULD BE SET AT 200 GALLON DOSE PUMP SPECIFICATIONS - SEE FIGURE 5 SHALLOW TRENCH DETAILS 11/16/0, REVISD FIGURE 5 0 W O� .Q caW U CO V! co U U c o U a N C � EN t Co t Q cz E 6- 0 E .°E 00 6U c_ OO 0 0 66 00 N N Cl) H 00 J CD � J LU W F W Y Z <wa w Z_ Q Q Z J H — U � N of S W mF—Z w � Q OD LO N r. 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V IP V G L¢l SSS r pv v v v r M M N N N 1881 `(Hal) peaH oiweuA(3 lejol �olilli MIN I 4 O O P11111010A IPs 1, Ara FA A 110111 M LO > o m of > a t o :: 2 U J IC 0 a0'° g �~ N g a> ti O C t O0 C LL_ L U, O R rr O uNi N a O 70 f- co J J cz N cu C UI O 0co = a) t6 p U O = RISE, 111!1!1n11111 11 MEN 111111111 1115111 lip, 1121 1 1 1 119 5 12 11 11111 NOUN MINE� M 1 nI�ImiQ11 11111 ME 11111111 l �III nnn�� I11 ii -�il11111111-11111111 SEEM mill III wliu '101 pv v v v r M M N N N 1881 `(Hal) peaH oiweuA(3 lejol C. cm m cm 0 Z C N 4 O O O O M LO > o m of > a t o :: 2 U J IC 0 a0'° g �~ N g a> ti O C t O0 C LL_ L U, O R rr O uNi N a O 70 f- co J J cz N cu C UI O 0co = a) t6 p U O = M U C. cm m cm 0 Z C' PRO -1 TABLE 1 - PERCOLATION TEST RESULTS Lot R99, Starwood DATE OF TEST: 4/22/99 Pitkin County, Colorado feet description 0 - 9 Iciay, gravelly, sandy, stiff to very stiff, very moist, light brown Ito brown, occasional large boulders NO GROUNDWATER WAS ENCOUNTERED WITHIN EXCAVATION 1 35 30 AVG. INTERVAL HOLE DEPTH TIME DEPTH DEPTH CHANGE, PERC. HOLE NUMBER OF HOLE, INTERVAL, START, END, (INCHES) RATE PERC. (INCHES) (MINUTES) (INCHES) (INCHES) (MPI) RATE, 1.50 Impil 1 35 30 27.00 29.50 2.50 12 30 29.50 31.00 1.50 20 30 31.00 31.50 0.50 60 30 31.50 32.25 0.75 40 60 32.25 33.00 0.75 80 60 33.00 33.75 0.75 80 80 2 48 30 36.00 38.00 2.00 15 30 38.00 40.00 2.00 15 30 40.00 41.50 1.50 20 30 41.50 42.25 0.75 40 60 j 42.25 1 43.75 1 1.50 40 60 1 43.75 1 45.25 1 1.50 40 40 JOB NO. 10778 �- --®- -- JOB NO. 10778 r: r f PRO - 2: TABLE 1 (CONT) - PERCOLATION TEST RESULTS Lot R99, Starwood Pitkin County, Colorado f..-+ A--- An+inn DATE OF TEST: 4/22/99 o-9 Clay, gravelly, sandy, stiff to very stiff, very moist, light brown Ito brown, occasional large boulders 9-10 Sandstone bedrock, weathered, hard to very hard, moist, red NO GROUNDWATER WAS ENCOUNTERED WITHIN EXCAVATION 5 42 30 AVG. INTERVAL HOLE DEPTH TIME DEPTH DEPTH CHANGE, PERC. HOLE NUMBER OF HOLE, INTERVAL, START, END, (INCHES) RATE PERC. (INCHES) (MINUTES) (INCHES) (INCHES) (MPI) RATE, 0.50 Impil 5 42 30 30.00 31.00 1.00 30 30 31.00 31.50 0.50 60 30 31.50 32.00 0.50 60 30 32.00 32.25 0.25 120 60 32.25 32.75 0.50 120 60 32.75 33.25 0.50 120 120 6 44 30 32.50 33.50 1.00 30 30 33.50 34.00 0.50 60 30 34.00 34.50 0.50 60 30 34.50 34.75 0.25 120 60 34.75 35.25 0.50 120 60 35.25 35.75 1 0.50 120 120 JOB NO. 10778 rj FIGURE 7 - PERCOLATION TEST RESULTS Lot R-99, Starwood DATE OF TEST: 4/16/02 Pitkin County, Colorado feet description 12 19 90 AVG. INTERVAL HOLE DEPTH TIME DEPTH DEPTH CHANGE, PERC. HOLE NUMBER OF HOLE, INTERVAL, START, END, (INCHES) RATE PERC. (INCHES) (MINUTES) (INCHES) (INCHES) (MPI) RATE, 1.75 Impli 12 19 90 13.50 16.25 2.75 33 30 16.25 18.00 1.75 17 30 11.25 12.25 1.00 30 30 12.25 1 13.00 0.75 40 40 ®® • 1 11 �� 11 � 1 _ �- -- --�® . 11 1 1 • 1 �® •1 11 11 11 �- -- --�® . 11 1 1 • 1 JOB NO. 10778 NUMBER OF HOLES AVG PE"', --�® . 11 1 1 • 1 JOB NO. 10778 NUMBER OF HOLES AVG PE"', QCCLA 0 U s O W 0 >o W p0 U � Z � O Z Q E W 0 50 U r 8m 2 F- CL O U W �E` Q 0 T_� s �+ U .� U O W 0 >o W p0 � Z � O Z J Q 50 U O o 1n Z T 2 F- CL LOW'LEVEL FI QQR PI AN ISSUE: DATE: H.OA FINAL 112-27-64 REVIEW JOB NO. 0427 SHEET NO. LOWER LEVEL FLOOR PLAN A2.1 SCALE- I/e" - 1'-0" momi O 2 5 16 s.comnr. ouRFs nluwR xlourtrn Z o 0 > C \ W � J p O z� O J Z So Q 0z �Y Z a LOWER LEVEL FLOOR PLAN SCALE 1'-0" �'� I/4.. O 1 6 DRAWING: LOWER LEVEL FLOOR PLAN ISSUE: i DATE: H.O.A. FINAL j 12-27-09 REVIEW 1 JOB NO. 8927 SHEET NO. A2.1A .-oPx,cM atwa nnvme neolrta s �5/6' 616 EA 51DE 2x4e-16'OG R -I5 BATT INSULATION DRY SURFACES - 5/6' 6WB VET SURFACES - 5/6' CEME1.7 BOARD TY/. MTBIIL7! KALL ASSE"%Y � 3 A2.1 B FUTURE C.D.U. FLOOR PLAN SCALE'/4" • 1'-0" Im�MMMM, `n1 S! U O M >0 C)0 OZ 5o o U N Z H G. 94WN LEVEL ISSUE: FLOOR PLAN DATE: H.OA FINAL TT 27-04 REVIEW JOB NO. 0427 SHEET NO. A2.2 MAIN LEVEL FLOOR PLAN SCALEM%" - 1'-0" O 2 8 16 cmvr:r Duca nn.mt.xamccrs W p0 Oz J �2 , so o 0 �Z U F CL OO DRAWING: MAIN LEVEL F ISSUE: ! DATE: H.OA FINAL 12 27-04 REVIEW I JOB NO. 6427 SHEET NO. A2 2A MAIN LEVEL FLOOR PLAN SCALD'/4" - P-0" O I 4 H ^s oxmar, ouNa rvuuaR,wonrtcrs L-5/11' 6Y13 EA 5111E 2x4.-16'CG R-13 BATT INSULATION DRY SURFACES - 5)11' SAS YET SURFACES - 5/D' GEMENT BOARD �M. MTBRIOR MALL A55lY40 LY TYVEK SLOG YRAP 5/S' 056 511--ATHIN6 1 �s v2• R-21 BATT INSULATION 7x6'.-16'OG 6 MIL POLY VB 5/11. 6m ®M. EXTERIOR YMLL ASD@d.Y 5/D' 6YB 5 In' R-21 BATT INSLLATION 2x61,-16'OC DRY SURFACES - S/D' 6Y® YET SURFACES - 5/B' GEMENT BOARD ®KRRIOR INCL ASDQELY 2• R-14 R1610 INSULATION PER SPECS MTERPROOF MEMBRANE PER 5PEG5 VERIFY MY D' STRLGT uln• 6 U2 2.4,-1MALL 2 x 4, TT INSULATION R-13 BATT INSLUTN7N 6 MIL POLY Y.B. eL b Pq�pATgN YMLL ASSEHELY 2'R'14 R161O POLY5TYRENE •BLUE BDARD• INSLLAnoN MTERPROOF MEMBRANE PER SPEG'S VERIFY YV D' STRLGT 13 V2' sln• LONG FON MALL 2x6,-16'OC R-21 BATT INSULATION "M' POLY ASSEMVB. 5/B•0.Y 6Y® PQ�DATION YMLL 5/11• GM 3 1/2' CERTA-S0.ND BATTS 5 In' (PLATE) 3 V2" CERTA-SO.AID BATTS 2x4'.-16'OG 511' 6m INTERIpR ° N YMLL ASSGiLY MTERPROOF MEMBRANE PER SPECS WY ~ COW, F YV STRKT) GONG DN WALL ®>MUDATION. 11- 0 O I 4 8 DMAIN 6WL ISSUE: 1 DATE: H.OA FINAL 112-27-04 REVIEW I JOB NO. 0427 SHEET NO. A2.2B I :.con �r awra �,�.�Irr[.�rrrcrs