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HomeMy WebLinkAbout03827I ~ ~· ~ ' i • ' • ! ' I· c;i;. v'O I • f -· ; ' t 71/r/~i ;~-IJ~~:-;;::JJ~-· ·· r:.. ~ o-,~---~·y-.. , ;)_ ~'r~ ---. ... " GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT . ./ 109 8th Street -Suite 303 Glenwood Springs, Coloredo 81601 ~ Phone (303) 945·8212 ' \ ·"-.. ; i INDIVIDUAL SEWAGE DISPOSAL PERMIT ' ... ,,. '.J. 'l,_, , N,. Permit _ 382"' Assessor's Parcel No. This does not constitute a building or use permit. • ' ~ PROPERTY , 7'\~{ t~ --; I (}./-. iJicK~ . l owner's Name L,Ll 'UD; ..J-./lC Present Address d<2. poK /fl, g Ver/Ill I Phene 455-~-8'gll a i .1 i System Location ____ ~~:i;"-"'J----'C..__,_,_f<.~3-'-{ 1..____:f,_((°i-'-'(e~--~~K~=b~S'D::____"· ___ _ Legal Description of Assessor's Parcel No.----------------------------------- SYSTEM DESIGN ______ Septic Tank Capacity lgallon) ______ Percolation Rate (minutes/inch) 'Iv'( Required Absorption Area • See Atttched Special Setback Requirements: ______ Other Number of Bedrooms (or other) ____ _ ' 1 l ; Date _____________ Inspector ___________________________ _ I I FINAL SYSTEM INSPECTION AND APPROVAL (as installed) Call for Inspection (24 hours notice) Before Covering Installation System Installer ________________________________________ _ Septic Tank Capacity_~------------------------------------- Septic Tank Manufacturer or Trade Name--------------'------------------- Septic Tank Access within 8" of surface -------------------------------- Absorption Area ________________________________________ _ Absorption Area Type and/or Manufacturer or Trade Name-------------------------- Adequate compliance with County and State regulations/requirements _____________________ _ Other~-----------------~------------------+--~------ Date __________ lnspector --'c ___ "'-8,_0.....,,t..L..,J(..__C,,__._,1"1,.._\.,_n...,,._.1 .... •~< rr~o ...... 1 <---'9~-_,_/_.L"---0--6-+- RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE *CONDITIONS: -, ' 1. All installation must comply with all requirements of the Colorado State Board of Health Individual Sewage Disposal Systems Chapter 25. Article 10 C.R.S. 1973, Revised 1984. 2. This permit is valid only for connection to structures which have fully complied with County zoning and building requirements. Con- nection to or use with any dwelling or structures not approved by the Building and Zoning office shall automatically be a violation or a requirement of the permit and cause for both legal action and revocation of the permit. 3. Any person who constructs, alters, or installs an individual sewage disposal system in a manner which involves a knowing and material variation from the terms or specifications contained in the application of permit commits a Class I, Petty Offense ($500.00 fine - 6 months in jail or both). \ While -APPLICANT Yellow· DEPARTMENT ':..a. .; ' • ; ' INDMDUAL SEWAGE DISPOSAL SYSTEM APPLICATION 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 page 4). LOCATION OF PROPOSED FACILITY: Near what City of Town._~~~·~, \?~"-L_~~--~-------Size of Lot 3S-AC-\.-(.,__ Legal Description or Address f2.-_cb <{2 o \A. V\. ~ ~ ~ \ q \: WASTES TYPE: ( ) DWELLING ( ) TRANSIENT USE tf1-COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES ( ) OTHER-DESCRIBE _______________ _ BUILDINGORSERVICETYPE: rV\.<l...\~~ 5~ ./-~-c_-4..-- Number of Bedrooms -Number of Persons_tf_,__ __ _ ( ) Garbage Grinder ( ) Automatic Washer SOURCEANDTYPEOFWATERSUPPLY: :tj-}-WELL If supplied by Community Water, give name of supplier: ( ) Dishwasher ( ) SPRING ( ) STREAM OR CREEK DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM:.__.2 _ ___!.!~.::..o_l-~-"=-=S'-------­ Was an effort made to connect to the Community System? -~©~~----------- A site plan is required to be submitted that indicates the followini: MINIMUM distances: Leach Field to Well: 100 feet Septic Tank to Well: 50 feet Leach Field to Irrigation Ditches, Stream or Water Course: 50 feet Septic System (septic tank & disposal field) to Property Lines: 10 feet YOUR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT WILL NOT BE ISSUED WITHOUT A SITE PLAN. GROUND CONDITIONS: Depth to first Ground Water Table __ 7sc)~~--tl_,__ ________________ _ Percent Ground Slope __ 2-=-_b_,/-'-o;:__ _____________________ _ ' ( e " TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED: 'tf1---SEPTIC TANK ( ) AERATION PLANT ( ) VAULT ( ) VAULT PRIVY ( ) COMPOSTING TOILET ( ) RECYCLING, POTABLE USE ( ) PIT PRIVY ( ) INCINERATION TOILET ( ) RECYCLING, OTHER USE ( ) CHEMICAL TOILET( ) OTHER-DESCRIBE FINAL DISPOSAL BY: ~. ABSORPTION TRENCH, BED OR PIT ( ) EV APOTRANSPIRATION ( ) UNDERGROUND DISPERSAL ( ) SAND FILTER ( ) ABOVE GROUND DISPERSAL ( ) WASTEWATER POND ( ) OTHER-DESCRIBE WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? l\.l {J PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, ifthe Engineer does the Percolation Test) ~ {-~ ~[L. ~. Minutes ~ per incli in hole No. 1 Minutes er inch in hole No. 3 Minutes ____ _,.er inch in hole No. 2 Minutes. _____ _,.er inch in hole No. Name, address and telephone ofRPE who made soil absorption tests: C r?rltt-,=n ~ Name, address and telephone ofRPE re~onsible for de~ of the system: __._l_.1~'2-ti\~ ___ Z-"--_-..{_,__---"~--= _.b ~ J \.4:-s h'<k-0-J '8' , sci s= Applicant acknowledges that the completeness of the application is conditional upon such 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. I further understand that any falsification or misrepresentation may result in the denial of the application or revocation of any permit granted based upon said application and in legal action for perjury as provided by law. Signed~[J_fJ -Date ~I(, ~J PLEAS~ AN ACCURATE MAP TO YOUR PROPERTY! I I I I I I I I I I I I I I I I I I I CR NK CONSTRUCTION INCORPORATED • 1129 •24· Rolld G111nd Junction, CO 81505 970-245-0577, 970·257·7453 (tax) INDMDUAL SEWAGE DISPOSAL SYSTEM DESIGN Date: Prepared by: Type of Design: Owner: May21, 2003 Thomas A. Cronk, P .E. Cronk Coll8truction Inc. 1129 -24-Road Grand Junction, CO 81 SOS 24S-OS77 Commercial Robert H. Williams, dba Dalbo P.O. Box 1168 Vernal, UT 43S-789-0743 Property address: 1250 County Road 319, Rifle, CO 81650 Tax schedule No.: Page 1 of9 I I I I I I I I I I I I I I I I I I I s: • ... 1.0 Site History The site consists of approximately S acres to be split from a 35 acre parcel of uncultivated native soil. Drainage is approximately 1 % to the north. A percolation test/soils evaluation was conducted on the property of reference on 05/13/03 by Tom A. Cronk, registered profeaaional engineer (R.P.E.). The perc excavation trench (excavation C) was located approximately 30' south of the north property line and approximately 255' east of the west property line. Additional perc holes were located 85' west of the trench (excavation B) and 155' west of the trench (excavation A). The perc test was intended to provide subsurface design parameters for design of an individual sewage disposal system (ISDS) for commercial use. As based on results from this subsurface investigation, the following ISDS design has been prepared. Results from the 05/13/03 perc test/soils evaluation are attached for reference as Appendix A. 2.0 Development ofDesim Parametm Aperc excavation trench (excavation C) was extended to a depth of 120" below ground surface (BGS). There was no evidence of ground water or high scuonal water table in the open excavation to a depth of 120" BOS. The soils evaluation indicates three distinct soil hori:rons underlie the site. A lithological description follows: depth Gn.l 0" -18" 18" -60" 60" -120" ciescriptjon sandy clay loam, light brown; grainy and friable sandy clay, tan; blocky; friable; moldable clayey sand and sand, tan; medium dense; smeared; friable As based on the perc test results (Appendix A), a weighted design perc rate of 40 min/in. is chosen for oversll system sizing for subsurface discharge below a depth of 18". Page2of9 I I I I I I I I I I I I I I I I I I I 3.0 System Design A trench absorption field is propoecd for discharge of septic effluent at the site. As shown in the attached graphics, the absorption field will consist of three trenches 2' wide and 57' long. The trenches will be excavated to a depth of 72". After excavation, 48" of gravel fill (l.0"-2.5" screened rock with aggregate components ofunifonn size) will be used to construct a level seepage bed in each trench. Adjacent trenches shall be separated by a minimum horizontal distance of6' (10'-12' separation recommended for ease of construction) of undisturbed soil. Septic effluent distribution piping in the absorption field will consist ofa 4" perforated discharge line placed level (end-to-end) down the center of each trench. As shown in the attached graphic, the perforated line will tenninate 18" from the ends of each trench. The perforated line will be embedded in the gravel seepage fill with a minimum of 42" of gravel under, an.d 2" of gravel over each pipe. Ends of the perforated lines will be looped with solid piping to adjaccilt trcnchcii. As shown in the attached graphics, septic effluent will be delivered from the septic tank to each of the three trenches through a clistnl>ution box to assW"e equal clistnl>ution of septic effluent to each trench. As shown in the attached graphics, floor drain effluent from the shop area will plumbed separately from the solid waste building sewer. Floor drain effluent will be discharged to a 1,000 gallon oiVwater separator (a 1,000 gallon septic tank may be used for the oiVwater separator). Effluent from the oil/water separator will be combine with septic tank effluent for discharge to the absorption field. Native soil wiHbe used to fill the remaining 18" of trench excavation and construct a soil cap over the absorption field. Before placing the soil cap, synthetic filter fabric ("myrafi", 140-200 mesh), hay, or untreated building paper will be placed over the gravel bed to prevent intrusion of fine soils. The native soil backfill will be mounded 5% over each trench to promote surface flow runoff in the vicinity of the absorption system. The installer should confirm the feasibility of gravity discharge of sewage effluent from the structure to the absoiption field by field verification of assumed design parameters. Assumed design parameters with respect to gravity discharge include: • distance from exit of sewage pipe at foundation line to absorption field -60' or less, • elevation of ground surface at entry to absorption field must be no more than 14" above the invert elevation of sewage pipe at exit from f01mdation line. If field measurements do not confinn these design assumptions, gravity discharge of septic effluent from the proposed structure can not be assured and a lift station may be required. Please contact the design engineer to address any design modifications necessary if these design assumptions are not upheld. The installer must also confirm the setbacks from property lines, building envelopes, and existing easements shown in the attached graphics are maintained. Additionally, any unknown utility lines, easements, or other adverse conditions disclosed during construction must maintain the required setbacks listed on page 6 of this docwncnt Sewage loading for the ISDS will include lavatory and water closet service for 3 employees and customers associated with a 1,000 sq. ft. office area and S,000 sq. ft. shop. The ISDS will be sized for a Page3 of9 I I I I I I I I I I I I I I I I I I I maximum of20 employees taken as the occupancy load for the building as allowed by the IBC building code. Average daily sewage loadings are calculated as follows: Sewage Source water closet & lavatory service floor drain Desjm Loading Average Daily Sewage Flow 20 employees @ 20 gaVemployee-8 hr. shift ...... 400 gal/day SO gaVday . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 gal/day Total Average Dally Sewage Flow ....•........................................ 450 gal/day A 1,000 gallon septic tank is required for retention of septic effluent for the proposed sewage loading. A non-corrodible Orenco filter (model # FrW0444-36MA) shall be inatalled at the final outlet Tee of the septic tank or in the effluent line between the septic tank and the .absorption field to limit the size of solids and sludge passing into the abtorption fielda. The filter must be 1CCCSSible for cleaning and replacement from the ground surface. As discussed above, a trench absorption field is proposed to discharge septic effluent to the underlying sub-soils. As shown in the attached graphics, the absorption field will consist of three trenches, each 2 ft wide, 72 in. deep, and 57 ft long. The trenches will be filled with 48" of gravel to provide an effective infiltration area of 855 square feet. Calculations and design parameters used to size the absorption field follow. Page4of9 I I I I I I I I I I I I I I I I I I I a , -.. DESIGN CALCULATIONS DESIGN AVERAGE SEWAGE DISCHARGE FLOW OF 450 GALJDAY PEAK FLOW = 150% OF AVERAGE = 615 GALJDAY DESIGN PERCOLATION RATE= 40.0 MINJINCH A • ~{t, WHERE, A = ABSORPTION FIELD AREA Q =PEAK FLOW I • PERC TIME/INCH A = 67 S {40.0 = 853.82 SQUARE FEET s UNADJUSTED TRENCH LENG111 = DESIGN AREA =8 53 ·82 = 426.91 TRENCH WIDTH 2 ADJUSTED TRENCH LENGTH = UNADJUSTED TRENCH LENGTH X ( W + 2 ) , W+ I +2(D) WHERE, W = WIDTH OF TRENCH (FT.) D = DEPTH OF TRENCH BELOW PIPE (FT.) ADJUS'I'ED TRENCH LENGTH = 426.91 X ( 2 + 2 ) = 170.76 2+1 +2(3.5) DESIGN TRENCH LENG71l = 3 TRENCHES@ 511 EACH= 171 1 Page 5 of9 I I I I I I I I I I I I I I I I I I I 4.0 Sjte Soecific Installation/Operation Reaujrcments The owner and system contractor shall be aware and comply with the following installation and system operation requirements. 4. I Installation -Sctb&cks. Notifications. and Inspections • All installation activities &hall be conducted in accordance with current Colorado Deoartrnmt of Health /SDS&gu/atlons as well as any rc!cyant Garfield County regulations •pd reoujremepts. If at any Mic dwjpg cons!Juctjon. subsurface site conditions are mcoyptmd whlch diffq from the desjsn parameters dcvcloocd in Section 2.0. construction activities will stop and the s!esjm engineer will be contacted to address any DCC£'M"' desim modifications. • • • Installation procedures including grade, location, setbacks, septic tank size, and absorption field size shall conform with the attached graphic details. Construction activities and syatem components will not encroach upon existing easements or utility corridors. A minimum of 6 ft of undisturbed soil shall be maintained between individual absorption clements and the septic tank and/or adjacent absorption clements. Minimum site specific setbacks for system components are: ~ Smtic:Illlk Absomtion Eilld BllildiD& Sswer water line JO' 2S' JO' · domestic well SO' JOO' SO' occupied hieing S' 20' property lines 10' JO' subsoil drains JO' 25' irrigation ditch OPCD SO' SO' lined/gated 2S 2S' solid pipe 10' 10' To ·avoid surface flow infiltration and saturation of the new absorption system, abandonment of irrigation in the vicinity of the disposal system is required. Diversion ditches necessary to divert surface flows around the new absorption bed must maintain the minimum setbacks listed above. All sewer !inea and effluent distribution piping shall be 4 inches in diameter, have glued joints, and shall be looped at termination of discharge. Septic tank effluent lines shall be placed level in the absorption field. All linea discharging sewage from the residence to the septic tank shall maintain fall of between 118 in. and 1/4 in. per foot and shall employ sweep 90's or 2-4S's at all turns. Sewer lines from the dwelling to the septic tank and at least 6 ft from the septic tank outlet muat meet minimum standard ASTM-3034. Sewer lines under driveways shall always meet minimum Schedule 40 PVC standards and shall be encased with corrugated metal pipe when covered with less than 24" of soil. Page6of9 I I I I I I I I I I I I I I I I ·1 ,, 1 • • • • • The installer shall not place fill in the open excavation until inspected and approved by the design engineer. Additionally, the final cover shall not be placed on sewer lines, septic tank, or the absorption area until the system has been inspected and approved by the design engineer. Provide 48 hour notice for all required inspections. A non-oorrodible Orenco filter (model # FrW0444-36MA) shall be installed at the final outlet Tee of the septic tank or in the effluent line between the septic tank and the absorption field to limit the siu of solids and sludge passing into the absorption field. The filter must be accessible for cleaning and replacement from the ground surface. The distribution box shall be set level on undisturbed native soil or a structural pad (e.g .. compacted fill or concrete) to prevent settling and promote uniform distribution of flow to the absorption field. A 45 degree bend shall be turned down on the septic influent line to damp surge flows from the septic tanlt and promote equal distribution. The seepage trenches shall be constructed with a 48 in. layer of 1.0 in. to 2.5 in. screened rock spread evenly over each trench. The cffiuent distribution lines will be placed level in the seepage beds with 42" of gravel under, and 2" of gravel over each line. A covering of untreated building paper, hay, straw, or synthetic filter fabric (e.g., "myrafi", 140-200 mesh) shall be placed on top of the gravel absorption trenches before placing the surface cap. The surface cap shall be mounded 5% over the absorption trenches to promote surface runoff. The system contractor shall be aware of the potential for construction activities to reduce soil permeabilities at the site through compaction, smearing, and shearing. The following precautions and cons1nlction procedures should be employed during installation to minimize disturbance to native soils: i. Excavation should proceed only when the moisture content of the soil is below the plastic limit. If a sample of soil forms a rope instead of crumbling when rolled bctwccn the hands it is too wet and should be allowed to dry before excavation continuca. ii. Excavation and backfill equipment should work from the surface where at all practical to avoid compaction of the soils at depth. iii. The bottom and sidewalls of the excavation should be left with a rough, open surface. The appearance should be that of broken or ripped soil as opposed to a sheared, smeared, or troweled surface. Any smoothed or smeared surfaces should be removed with a toothed rake or shallow ripper taking care to remove loose residues from the bottom of the trench by hand if necessary. iv. Care should be taken in placing fill materials in the excavation to avoid damaging the exposed soil surfaces. Page7of9 I I I I I I I I I I I I I I I I I I I 4.2 Operation • Maintenance and htspections • The owner shall install a structural barrier if necessary and take precautions to prevent vehicular traffic, excessive surface watering, accidental flooding, or other activities m the vicinity of the absorption field which may compact, saturate, or otherwise alter the subsurface soil parameters used in designing the septic system. • The owner will plant and maintain grass or other shallow rooted cover crop to prevent erosion and promote evapotranspiration over the absorption field. • The owner will inspect and maintain the required mounding and drainage away from the absorption field to prevent saturation from precipitation and surface flows. • To mitigate the generation of preferential flow channels which may compromise the operation of the system, the owner will inspect and prevent intrusion of burrowing animals and deep rooted plants into the absorption field. • The septic effluent filter shall be inspected and cleaned as necessary every six (6) months. • The owner will conduct periodic maintenance of the septic system by removing accumulated sludge from the septic tank every 3-4 years to prevent clogging of the . absorption field. Page 8 of9 I I I I I I I I I I I I I I I I I I I L ' ' 5.0 Limitations This report is a site specific design for installation of an individual sewage disposal system and is applicable only for the client for whom our work was performed. Use of this report under other cin:umstances is not an appiopriate application of this document. This report is a product of Cronk Construction Incmporated and is to be tlkcn in its entirety. Excerpts from this report may be taken out of context and may not convey the true intent of the report. It is the owner's and owner's agents responsibility to read this report and become familiar with the recommendations and design guidelines contained herein. The recommendations and design guidelines outlined in this report are based on: I) the proposed site development and plot plan as furnished to Cronk Construction Incorporated by the client, and 2) the site conditions disclosed at the specific time of the site investigation of reference. Cronk Construction Incorporated assumes no liability for the accuracy or completeness of information furnished by the client. Site conditions are subject to external environmental effects and may change over time. Use of this plan under different site conditions is inappropriate. If it becomes apparent that current site conditions vary froll) those anticipated, the design engineer should be contacted to develop any required design . modifications. Cronk Construction Incorporated is not responsible and accepts no liability for any variation in assumed design parameters. Cronk Construction Incorporated represents this report has been prepared within the limits prescribed by the owner and in accordance with the current accepted practice of the civil engineering profession in the area. No warnnty or representation either expi 11ed or implied is included or intended in this report or in any of our contracts. Thomas A. Cronk, P.E. ~J (!i) Date~d--/1 ?,,ro3, NOTE: This Individual sewqe disposal plu II meant to Include the following three pages of graphics lnclndlng: I) plot plan, 2) aeptlc layoat plan, and 3) coutruc:tlon details (absorption field plan view and absorption field croa HCtlon). Tile plu II aot to be Implemented In the absence of these related graphics. ID addition, nsaltl from the percolation test and sons evaluation are included for reference as Appenclix A. Page9 of9 I I I I I I I I I I I I I I I I I I I I I L - _ ___..;;•C~o·~;rol.. -----l in l;!l "' l!!i -1.l .-dOJS ---· -- NOTE GRAVITY DISCHARGE or SE'JAGE EFFLUENT FROM THE RESIDENCE TD THE DISPOSAL SYSTEM IS BASED ON Tt£ FCLLO'JING DESIGN ASSUHPTtONSz LENGTH or SE'JAGE PIPING FROM EXIT AT FOUNDATION LINE TO ENTRY TO ABSORPTION FIELD = 60' OR LESS ELEVATION or GROUND SURFACE - AT ENTRY TO ABSORPTION FIELD sNQ MORE THAN 14• ABOVE INVERT ELEVATION or SE'JAGE PIPE AT EXIT FRCJ1 FOUNDATION LINE DISC! AIMER Ir THESE DESIGN ASSUMPTIONS ARE NOT UPHELD DURING CONSTRUCTION, GRAVITY DISCHARGE CAN NOT BE ASSURED AND A LIFT STATION HAY BE REQUIRED - -- - NOTE CAl.L 1-aoo-'J22-1,87 HR UTILITY LOCATES BEFORE EXCAVATING 395.88' cleo.n out. typ. =:::i = solid wa.ste effluent line . _ :f[j~tlc t•ok - - -- t•ok --- \ ____ii\ ~O'f'l\n~ A ,, ---\ :15 tl"'lbutlon bo ~ :., I. I --3 tr"'e-nches, eo.ch 57' long x 6' deep\ , 1 . x 2' wide filled with 4' of stone . __i---57',typ,__., .; 0·"1"·r ____ -, \ i .. .,..,.. ..... I - \ \\ ~~- - 0\ .;;- ..-......-:~ra. t• ftoor dra.lns frol'I ..-solid •a.st• s•wer"' line o.nd r plul'lb to oH./WQ ter Sl!'pa.ra. tor / ~flee/shop L ____ _J 1000 ga.llon s•ptk: to.nk to toe utiliz•d for ai\/wo.t.r S•po.rGtor <6' l"\ln. s~tbo.ck fr°" solid wast• septic tGnk) i! n \\ I "I ,ff I ..... . ,._ ,, ~ El I well I I I I I I I I I I I r-.... I '-..... ..... gro.v•l dr"'lve 0.r"'PO. ..... ........... ..... ~~~~~•-onk forM ~ truck wosh r-insa te froM tr-uck wash to be disposed of through surfacP PVOpOl'"Q tlo,,.. NOTE THE FOLLOWING SETBACKS HUST BE MAINTAINED1 SEPTIC TANK SPRINGS SO' 'JELLS SO' CISTERN 25' STREAM so· DOMESTIC 'WATER LINE -10' DALBO PROJECT 1250 COUNTY ROAD 319 SEPTIC LAYOUT PLAN MAY 16, 2003 SCALE• 1~=60' ABSORPTION FIELD 100' 100' 25' so· 25' t NORTH \ " \ • ,, I I I I I I I I I I I I I I I I I I I DISTRIBUTION BOX SEPTIC INFLUEN . ' 6' MIN .. I0'-12' RErERRED, TYP. -+-I--18' SOLID PIPING rRDM END or TRENCH TO TRANSITION TD PERFORATED DISTRIBUTION LINE, TYP. 2' l.l!DE X 6' DEEP X 57' LONG TRENCH FILLED \#ITH 4' or GRAVEL ABSORPTION TRENCH -PLAN VIEi.i SCALE' I •=IO' SOIL CAP CMOUND sr.> NATIVE SOIL BACKF'lll EXISTING GROUND I LOOP SOLID PIPING AT ENDS SURFACE SYNTHETIC FILTER FABRIC, HAY, OR--~, UNTREATED BUILDING PAPER OVER GRAVEL I I 1---..j 11 -18' 4• PERFORATED DISTRIBUTION LINES, TYP. CM1NIMUM or 2· GRAVEL OVER> 2'X4' GRAVEL SEEPAGE TRENCH c1.o·-2.s· SCREENED ROCK> I I 7 • I I • • I I I I I I I I L __ _J r-2•·1. 6'HIN.d I0'-12' PRErERRED •2 -60' •3 OUTLETS AS REQUIRED 4• 45"-BEND SURGE fLD'w' SUPPRESSOR ABSORPTION TRENCH -CROSS SECTION <TYPICAL ONE or THREE> -120· SOILS LOG <SEE NOTES) DISTRIBUTION BOX DETAIL SCALE• 1"•1' SCALE' 1'=5' SOILS LOG NOTES II -SANDY CLAY LOAM, LT BROl./NJ GRAINY L FRIABLE 12 -SANDY CLAY. TAN1 BL.DCKYl F'RIABLE1 HOLDABLE 13 -CLAYEY SAND L SAND, TANJ MEDIUM DENSEJ SMEARED, fRIABLE NO EVIDENCE or GROUND WATER OR HIGH SEASONAL l.IATER TABLE TO 120' DALBO PROJECT 1250 COUNTY ROAD 319 CONSTRUCTION DETAIL MAY 16, 2003 I I I I I I I I I I I I I I I I I I I APPENDIX A SOILS AND PERCOLATION REPORT CRONK CONSTRUCTION INCORPORATED I I I I I I I I I I I I I I I I I I I CRONK CONSTRUCTION INCORPORATED • 1129 ·2+ Roff Qnind .lunctlon, CO 81505 970-241-0S77, 97o-217·7453 (fax) Date: Prepared by: Client: Property address: Tax schedule No.: Legal Descript.: 1.0 Soils Evaluation SOILS AND PERCOLATION REPORT May 13, 2003 Thomas A. Cronk, P.E. 1129 -24-Road Grand Junction, CO 81505 245-0577 Dalbo, Inc. POBmdl68 Vernal, UI' 84078 (435) 789-0743 Nick Richins 354 s. 3290 w. Vernal, UI' 84078 (435) 789-1820 1250 County Road 319, Rifle, CO 81650 The site consists of approximately 5 acres to be split from a 35 acre parcel of uncultivated native soil. Drainage is approximately I% to the north. A percolation test/soils evaluation was conducted on the pioperty of reference on 05/13/03 by Tom A. Cronk, registered professional engineer (R.P.E.). The perc excavation trench (excavation C) was I ocatcd approximately 3 0' s outh oft he north property I ine a nd approximately 255' east of the west property line. Additionalperc holes were located 85' west of the trench (excavation 8) and 155' west of the trench (excavation A). Aperc excavation trench (excsvation C) was extended to a depth of 120" below ground surface (BGS). There was no evidence of ground water or high seasonal water table in the open excavation to a depth of 120" BOS. The soils evaluation indicates three distinct soil horizons underlie the site. A lithological description follows: depth (in.) O" -18" 18" -60" 60" -120" description sandy clay loam, light brown; grainy and friable sandy clay, tan; blocky; friable; moldable clayey sand and sand, tan; medium dense; smeared; friable Page A-1 of A-3 ',•.• . I I I I I I I I I I I I I I I I I I I ..... ' Pere boles weie constructed in excavation A at the surface and at depths of approximately 38 in. and 70 in. Additional perc boles weie constructed at the surface and at depths of 40 in. and 72 in. in excavation B, and at the surface and at depths of 42 in. and 84 in. in excavation C. The holes appeared to be well saturated at the time of the test. Results of the percolation test are shown in Table I . TABLE I Pmolation Test Rcsulu 1250 Couniv Road ll9, Rifle. CO Depth Time oo 0511 l/Ol Time Pere Drop Rate ll:5l 14:ll 14:53 min/in !Al0"· 18" 3.0 3.125 3.25 60/0.25 240 1Al38"· '6" 3.5 6.37' 8.375 6()(4.875 12 CAI 70" • 90" 6.75 u 10.125 60l3.375 18 IR\Q" • 16" 4.0 6.0 7.625 60l3.625 17 tR\4C)•. Sf»• 1.15 11.0 12.5 6()(l.75 16 18172". 90" 7.0 8.7' 10.0 6()(l,0 20 ICI O" • 16" 6.0 8.75 11.0 60/5.0 12 (C)4l" • 60" 8.25 11.0 11.75 60/3.5 17 ICI 84" • 96" 6'.0 6.75 7.875 60/1.875 l2 2.Q Conclusions and Recommendations Soils at the site appear acceptable for implementation of an individual sewage disposal system (!SOS). The following site-specific considerations should be observed during implementation of the !SOS: • The. bottom of the ISDS absorption field should be located no deeper than 72" BOS to maintain 4' of usable infiltration IOil abow the extent of the soils observation excavation located at 120" BOS. A designperc rate of 40 min/in. is recommended for overall system sizing. • Care should be taken during cons1ruction to avoid compaction and smearing of the exposed infiltrative surfaces and preserve the natural permeability of the native soils. Page A-2 of A-3 I I I I I I I I I I I I I I I I I I I 4-• • 3 .0 Ljmjtations This report provides a professional assessment of the feasibility of implementing an individual sewage disposal system on the property of reference. The design parameters developed in this document are representative of the site conditions disclosed at the specific time of the site investigation. Site conditions are subject to change from external events both manmade (inigation or pond construction) and naturally occuning (flooding or excessive precipitation). Cronk Construction Incorporated is not responsible and accepts no liability for any variation in assumed design parameters caused by external events. Cronk Consttuction Incorporated represents this report has been prepared within the limits prescribed by the owner and in accordance with the current accepted practice of the civil engineering profession in the area. No warranty or representation either expressed or implied is included or intended in this report or in any of ourcontracts. SEAL ~ ~ A. Cronk, P.E. Date M'7r ~) ,/ Gel> 3 ' , Page A-3 of A-3 CRONK CONSTRUCTION INCORPORATED • 1129 ·24· Road Grand .tuncUon, CO 81505 970-245-0577, 970-257-7453 (fax) September 9, 2003 RECEIVED SEP 1 2 2003 CERTIFICATE OF INSPECTION AND ACCEPTANCE Individual Sewage Disposal System Dalbo Project 1250 County Road 319 Rifle, CO 81650 The individual sewage disposal system of reference was inspected on September 9, 2003. The system was found to conform with the plans and specifications set forth in the engineered sewage disposal system design for the aforementioned property prepared on May 21, 2003 with the following modification approved by the design engineer: two (2) trenches, each 94' in length were installed for a total of 188', rather than three (3) trenches, each 57' in length for a total of 171'. Copies of the engineered plan are on file at the Garfield County Building Department or may be obtained from the undersigned design engineer. ~\Ge Thomas A. Cronk, P.E. 1129 -24-Road Grand Junction, CO 81505 970-245-0577 2 alosorpt1an trenches, each '34' long x 6' deep x 2' wide filled with 4' of stone NOTE PROTECT ALL ISDS ELEMENTS FROM VEHICLE TRAFFIC ~ 82.5' -7---=6.5-.--------:::====~::::::::==:;;~1-~1 -- DALBO F>ROJECT 1250 COUNTY ROAD 319 ASBUIL T DRA'w'ING SEPTEMBER 9, 2003 SCALE: t•=.2'0' i NORTH " '°v s-. " ">. clean out r-7·--, office ~ s " •. ~ .;-- ~,