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HomeMy WebLinkAbout03410 Replacement OWS Design Job No. 12757 Page 2 percolation rate of 14 MPI. One 1500 -gallon two- compartment precast concrete septic tank with an effluent filter on the outlet, and three chamber -type trenches must be installed as indicated on Figure 1. Each trench must have 1 row of 9 chambers. A flow splitter basin is required to distribute effluent to the trenches. Vehicle movement over the drain field trench area during construction should be kept at a minimum to prevent compaction of the receiving soils. The bottom of the bed should be scarified with a pick, shovel, or backhoe bucket teeth prior to the addition of dispersal gravel. The surface of the field should be seeded after installation of the fields. We recommend using a native seed mix available at seed stores. These mixes do not require irrigation and develop a growth 10 to 15 inches high. No automatic sprinkler system should be installed over the fields. OPERATION AND MAINTENANCE The owner must realize an OWS is different from public sewer service. The owner must be aware of, and assume responsibility for maintenance of the system. In the absence of a monitoring program, we recommend the septic tank be pumped every two years. Effluent filter and screened vaults, as applicable, are to be cleaned during pumping. There are daily considerations such as not putting plastic or other nonbiodegradable materials into the septic system. Garbage disposal use should be minimized. The backwash of a water softener may be harmful to the OWS. A separate drywell should be constructed for the backwash waste, if a softener is installed. Chemically treated water from a swimming pool or spas should not be introduced to the OWS. LIMITATIONS An OWS design should be installed by a contractor who is experienced in its installation. Our investigation, layout, design and recommendations are based on data submitted. If subsurface conditions considerably different from those described in this report are encountered, we should be notified to evaluate the effect on the proposed OWS. If the health department makes modifications to this design, we should be contacted to evaluate the impact on the perfortnance 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 ISDS regulations and requirements. We must be called to observe installation of the OWS. CHURCH & Associates ,O REn y , O`Ie� et V Edward O. Church, ' E.; 13172 EOC /trp F;. ------ " 2 copies sent copy to David Ritchie and Associates, 981 Cowen Drive, Suite E, Carbondale, CO 81623 copy to Garfield County Health Department SCALE 2079 COUNIY ROAD 112 1" = 100' i GARFIELD COUNTY, COLORADO r - I- 418.5 SF OF INFILTRATIVE AREA IN 3 GRAVELLESS TRENCHES. EACH TRENCH MUST HAVE I ROW P-6 7 2 :- 1 =--- r'" 9 CHAMBERS FLOW SPLIrIB____2i • BASIN EXISTING DRYWELL OF o -,c----1----UNKNOWN DIMENSIONS TO / BE ABANDONED CLEANOUT --- I I oP-1 Sisillik ONE 1500-GALLON TWO-COMPARTMENT PRECAST ° P-2 I CONCRETE SEPTIC TANK WITH EFFLUENT FILTER RESIDENCE TO BE 1 is IN SECOND COMPARTMENT REMODELED TO A FOUR BEDROOM e - 0 RESIDENCE NOTE: PROPOSED < \ DIRECTION OF WELL, 100+ FEET FROM DRAIN FIELD PROPOSED UPGRADE OWS MUST MEET SETBACK OF 10 FEET FROM PROPERTY BOUNDARY AND 25 FEET FROM RESIDENCE \ \\ \ NNIN, \ Ns %., SITE PLAN AND LOCATION OF PERCOLATION likES JOB NO. 12757 FIGURE 1 N 0 ■ � 1 V ` 11 ( 1 2 1 .1 ( | | > ] a| d • ` K § U | . . � E # |g| • ,_. KB \.-4.3. § § i \� / - 4 ww � - | | § 9/ 0 i / 1 / 2 ■&R | | 2 E §l§ I. § / r \ 5 /§ - 1. CA ƒ ƒ ° ) ) °)) II Z I § I / <5m | b �| Sin ma ® 2 K■P & 6 I § ° _ II I .5 ■ Ai • �2 i � ■ g a 11 | r 1,1 | | , [ vi u 1 ._ § i „, E ■bE, cl_ La 6k. } [ 0 c ° } ( & \ \ § o § P8 wi ce � § R. §_ . / k Q a w22O y 0 « ;:¥■ . 0 G 0 & e May -24 -O0 09:37A P.02 INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPLICATION OWNER Dean) f Kafr/ kea-fini ADDRESS 207q (ow y R oOro 1t2 PHONE `163- o23 CONTRACTOR r 8 . A . / ADDRESS PHONE PERMIT REQUEST FOR NEW INSTALLATION ( ) ALTERATION ( ) REPAIR Attach separate sheets or report showing entire area with respect to surrounding areas, topography of area, habitable building, location of potable water wells, soil percolation test holes, soil profiles in test holes (See 4. 4). Near what City of Town_ klZ8e bat-l✓ Size of Lot Y . Y ac.QES Legal Description or Address L 2 5 Ica 'nt Pi, l 7 5 R 116r l 6 b( P, h, WASTES TYPE: (Xi DWELLING ( ) TRANSIENT USE ( ) COMMERCIAL OR INDUSTRIAL ( ) NON - DOMESTIC WASTES ( )OTHER / - DHSCRIB BUILDING OR SERVICE TYPE: L_.9/ F Number of Bedrooms X1 Number C Number of Persons 3 2 (Garbage Grinder (4 Automatic Washer Dishwasher SOURCE AND TYPE OF WATER SIMPLY: e4 WELL ( ) SPRING ( ) STREAM OR CREEK If supplied by Community Water, give name of supplier: DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: V#AtwowlJ Was an effort made to connect to the Community System? A/V it site plait is reaaired to be submitted that Iudkata the followine MINIMUM distance: Leach Field to Well: 100 feet arse Se m_ Septic Tank to Well: 50 feet 5e6 4 2.0 Leach Field to Irrigation Ditches, Stream or Water Course: 50 feet 5EE A2' 0 Septic System to Property Lines: 10 feet Sec strlic YOUR INDIVIDUAL SEWAGE DISPOSAL SY^t,,TFM PERMIT WILL NOT RE ISSUED WITHOUT A SITE PLAN. GROUND CONDITIONS: Depth to first Ground Water Table SEF. c5 c Percent Ground Slope 2 May -24 -O0 09:38A SEC /ljlAckla) SE7°al.C.. D.c sit& P.03 TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED: :( .) SEPTIC TANK ( ) AERATION PLANT ( ) VAULT ( ) VAULT PRIVY ( ) COMPOSTING TOILET ( ) RECYCLING, POTABLE USE ( ) NT PRIVY ( ) INCINERATION TOILET ( ) RECYCLING, OTHER USE ( ) CHEMICAL TOILET ( ) OTHER - DESCRIBE FINAL DISPOSAL BY: ( ) ABSORPTION TRENCH, BED OR PIT ( ) EVAPOTRANSPIRATION ( ) UNDERGROUND DISPERSAL ( ) SAND FILTER ( ) ABOVE GROUND DISPERSAL ( ) WASTEWATER POND ( ) OTHER - DESCRIBE WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? p)ACOI,ATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the Population Test) Minutes per inch in hole No. 1 Minutes per inch in hole NO. 3 Minutes per inch in hole No. 2 Minutes per inch in hole NO. _ Name, address and telephone of RPE who made soil absorption tests: CHoItc-th pnvp ,_ss oc.ttrr 3o3 -'U3` 9317 4S° 1 WmAs - 1iif Rruh. Wrlekt la ixte 33 Name, address and telephone of RPE responsible for design of the system: 54/4G Applicant acknowledges that the completeness of the application is conditional upon suoh further mandatory and additional tests and reports as may be required by the local health department to be made and furnished by the applicant or by the local health department for purposed of the evaluation of the application; and the issuance of the permit is subject to such terms and conditions as deemed necessary to insure compliance with rules and regulations made, information and reports submitted herewith and required to be submitted by the applicant are or will be represented to be true and correct to the best of my knowledge and belief and are designed to be relied on by the local department of health in evaluating the same for purposes of issuing the permit applied for herein. 1 thither understand that any falsification or misrepresentation may result in the denial of the application or revocation of any permit granted based upon said a • ' 1 and legal action for perjury as provided by law. IP It Signed i� ..v. J � Date 111j 00 PLEASE DRAW AN A • TE MAP TO YOUR PROPERTYI I 3 CHURCH & Associates, Inc. ENGINEERS & GEOLOGISTS July 5, 2000 Dawn Keating 2079 County Road 112 Carbondale, Colorado 81623 Subject: Subsurface Investigation and Replacement OWS Design, Keating Residence 2079 County Road 112 Garfield County, Colorado Job No. 12757 Dear Mrs. Keating, As requested, we have investigated subsurface conditions at the site and designed a replacement onsite wastewater system (OWS) for the existing residence. The subsurface investigation was performed on June 27, 2000. • BM CONDITIONS The property is located in a residential area in Garfield County where OWS are required. There is an existing three - bedroom residence that will be remodeled to a four - bedroom residence. A drywell of unknown dimensions is located to the north of the residence and should be abandoned after installation of the proposed OWS. The proposed drain field area has relatively no slope, and a thick cover of irrigated blue grass. The residence is served by an onsite well located 100+ feet from the proposed drain field. PROPOSED CONSTRUCTION A three- bedroom residence to be remodeled to a four bedroom residence exists as indicated on Figure I. We have sized the OWS based on four bedrooms and 600 Gallons Per Day (GPD) using Garfield Health Department loading of 75 gallons per day per person. The sewage loading with a peaking factor of 1.5 is 900 GPD. This loading includes washing machines and garbage grinders. The drain field is to be a minimum of 10 feet from property boundaries and 25 feet from the residence. SUBSURFACE CONDITIONS A subsurface investigation was performed by digging three percolation holes, 28 to 36 inches deep, and one profile pit at the locations indicated on Figure 1. Subsurface materials in the profile pit consisted of 6 inches of topsoil, underlain by sandy clay to the maximum depth explored of 8 feet No ground water was encountered. Percolation tests indicate percolation rates of 20 to 40 minutes per inch (MPI). The average percolation rate is 30 MPI. Percolation data is presented in Table 1. RECOMM ENDATIONS The installation must include a septic tank, a pump, and four chamber -type drain field trenches installed at the locations presented on Figure 2. The OWS design is based on an average sewage Toad of 600 GPD and a percolation rate of 30 MPI. One 1500 -gallon two-compartment precast concrete septic tank with a pump DENVER 4501 Wadsworth Boulevard Wheat Ridge, CO 80033 CASTLE ROCK 303.660.4950 303.463.9317 Fax: 303.463.9321 EVERGREEN 303.816.1455 7A79. COUNTY R ©!1►D 112 SCALE oARF,ELD COU „, , COLORADO w — 60' lag EXISTING DRYWELL OF UNKNOWN 2" PVC PUMP DIMENSIONS TO BE FLOW LINE 1 ABANDONED SPLITTER • 0 BASIN THE COMP A RTME �'' — ' — L CLEANOUT TWO—COMPARTMENT PRECAST • CONCRETE SEPTIC 496 SF OF TANK WITH PUMP INFILTRATIVE IN BIOTUBE VAULT AREA IN 4 IN SECOND GRAVELLESS COMPARTMENT TRENCHES. EACH — — ' TRENCH / • I MUST HAVE I ROW OF 8 CHAMBERS El I K).\\\\,..\\\< NOTE: PROPOSED DRAIN DIRECTION OF WELL, FIELD MUST MO+ FEET FROM MEET SETBACK PROPOSED UPGRADE OF IO PET OWS FROM PROPERTY BOUNDARY AND 25 FEET FROM RESIDENCE LOCATION OF PROPOSED UPGRADE JOB NO. 12757 OWS `FIGURE 2 z s . �r' Lei #+C1T)1 .i. 2079 County Road 112 • DATE ( 6 -28-00 t Garfield County, Colorado • , feet descdption 4 0-6 , ' Clayey topsoil, sod, rootzone 6-6' Clay, sandy, stiff, moil, browns ght brey,aealcareous veins NO GROUNDWATER WAS ENCOUNTERED WITHIN THE EXCAVATION AVG. °" DEPTH TIME DEPTH DEPTH INTERVAL. HOLE ' , DF HOLE, INTERVAL START, END, PERC . PERC. h (INCHES) (MINUTES) (INCHES) ( INCHES) RATE (IMPI) RATE, a ;.,w (MIN) ; a , 36 30 3.50 614 «.`st 92 e., P - 30 6.00. 750 ,. �_ f �� g 20 -•ea[ . " ; ' , 30 7.50. � : 16 40 y i .F4 . 12 ". . % ; a. t, 111=1 30 2'$01' r` ECEM It " 17 "' ` , w ro 30 6 ,rt L t, 17 is � " 30 .6.00-1, ' , 7. 1 i 20 20 :. �� r�;gt 'a c" sh y , . od � ' 29 30 2.00 " 4313 c4. :, ;' 15 ; . - 30 900 "":.;; n 24 � 30 5.25 6.25 :( 30 ;a. 4 ' `` 30 3.00 4:00 'ra 30 , ;1 30 4.00 5:00 , ras 30 30 30 500 ; 6.2 try !Is 24 , 13.41 . k , Fte0 1 "i 28 30 3.O0 '5.00 ti 15 30 5:00 6.50 44 , L ,,:j 20 g 30 6.50 7. 50' 1Y-1. II 30 N * . , , e•. 30 3.00 9:25 24 , � ° S 30 4.25 6:00 , i 17 30 6.00 6. ' 40 40 NUMBER OF 1-101 � 3 ,' . � :�°,+, t AVGPERCOLA11O�Te jMB ,P' - ,k; t Job No: 12757 s : .. , s .,. , , . - ., , .�,,,_� � _ - � 1.11 , .."1-;:ii. - , a�..v . __- - ............. onsite restroom for use by construction personnel and any required temporary heat. 01020 Pricing Prior to commencing the work, the Contractor shall provide a detailed project budget based upon current drawings and specifications. Include allowances for all items and finishes "to be selected later" and any required items not shown which can be identified at this time. Include a minimum 10% contingency factor as a separate line item. Work shall not begin until the budget is reviewed and approved by Owner. 01300 Submittals Where requirements are noted on drawings or in this specification for submittals or shop drawings, such documents and /or samples as needed to verify conformance of the specified item shall be submitted to the Architect and /or Owner for review. Such review shall be complete prior to commencing that portion of the work. Allow ten days from date of submittal for each review. Submittals shall be required where noted herein and wherever items or materials proposed for use in this project differ from specified items or materials, including items proposed under "or equal" provisions of this specification. Failure by the Contractor to schedule submittals in a timely manner shall not be accepted as grounds for granting any extension of the Contract Time. Any unapproved materials or systems that are installed and found to be unacceptable shall be removed and replaced with acceptable materials at the Contractor's expense. Contractor shall submit a detailed submittal schedule within 30 days of signing Contract. Submittal samples and documents shall be presented in a format and quantity of copies such that copies may be returned to the Contractor and Subcontractors as needed, one copy shall be sent to the Owner, and one copy shall be retained for the Architect's records. Submittals which do not meet this requirement or which are not made in a timely manner may be rejected, required to be resubmitted, or cause project delays at the Contractor's expense. Certain submittal requirements may be altered or partially waived at Contractor's request, if satisfactory evidence of specification compliance is demonstrated (for example, by using the named mfr's product) and other items may be added to the list as the work proceeds. Large samples may be visited at other locations, if more convenient. 01400 Quality Control All materials and workmanship shall meet or exceed the minimum of accepted industry standards, the requirements included herein or as required by the Owner. All Work shall conform to the requirements of the 1994 edition of the Uniform Building Code, currently adopted editions of the Uniform Mechanical Code, National Electric Code & Uniform Plumbing Code, and all other applicable local codes and ordinances. Nothing shown, or not shown, on the drawings shall relieve the Contractor of his responsibility for complying with all applicable codes, ordinances and regulations. The Contractor shall be responsible for ensuring that all work is fully weather tight and serviceable, as intended in the Contract Documents. All materials shall be as shown, noted, or specified. Generally, all exterior and most interior finishes will be new and upgraded from the existing house. All materials noted to be