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Home My WebLink About04007ect sea co GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT 108 Eighth Street, Suite 201 Glenwood Springs, Coloradof 81601 Phone (970) 945-8212 INDIVIDUAL SEWAGE DISPOSAL PERMIT PROPERTY Permit 4007 Assessor's Parcel No. 11,1-00-07F This This does not constitute a building or use permit. Owner's Name -AAI KenPresent Address r'OSaCIta_13ie-ill-371"73 Phone 6425.--4.13 (/‘ SystemLocationon /Zc• n • • d. gine Ce V lbs %A-' 1 Lam eXeNt ° 11 Legal Description of Assessor's Parcel No SYSTEM DESIGN y� /00 0 Septic Tank Capacity (gallon) Other f7- Percolation Rate (minutes/inch) Number of Bedrooms (or other) 3f " . Required Absorption Area - See Attached .5-404 lc: 36. SSS ri/tG/J Special Setback Requirements: Date Inspector 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 /Hi-- / Jn{ (�/ ,,•,,t'v,,�'^p-p-1- /� ` Date [l i-- U ! Inspector 7/I D1itk+ !/[daui / • 1 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 1 — 6 months in jail or both). Wkwn A 00 ,nnur v „ nein. Ill. .� INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPLICATION OWNER kith L. La Av�-t ADDRESS 19IS- 29 3 Road I�iJk Co Elm CONTRACTOR .T. -Septires ADDRESS IZo5 C R 321i�i.4le, Co .91(,5--o PHONE 97o 61S --,23V 4. PHONE 97o 62S-378.6 PERMIT REQUEST FOR (s4 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 Ri'4'le, COI a'ea do Size of Lot 33.7 acres Legal Description or Address od r/ O 5 q % kg T tM (�-f 1 La&'t t,., �)ct h' .. WASTES TYPE: ( i• -y DWELLING ( ) TRANSIENT USE ( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES ( ) OTHER—DESCRIBE BUILDING OR SERVICE TYPE: Re -5,' d en f-ta I 140n -ie Number of Bedrooms 3 Number of Persons 2. 444 Garbage Grinder (fr-) Automatic Washer (s --)-Dishwasher SOURCE AND TYPE OF WATER SUPPLY: (l' WELL ( ) SPRING ( ) STREAM OR CREEK If supplied by Community Water, give name of supplier: DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: ,2, m17e,5 Was an effort made to connect to the Community System? n o A site plan is required to be submitted that indicates the following, 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 Percent Ground Slope TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED: el— 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: (-r 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? PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the Percolation 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: Name, address and telephone of RPE responsible for design of the system: 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 / .*1 ,P /'t4 r Date T 7d 07 PLEASE DRAW AN ACCURATE MAP TO YOUR PROPERTY!! CRONK CONSTRUCTION • INCORPORATED 1129 -24- Road Grand Junction, CO 81505 970-245-0577, 970-257-7453 (fax) November 25, 2004 CERTIFICATE OF INSPECTION AND ACCEPTANCE Individual Sewage Disposal System Latham Residence Adjoining to lot 1985 -293- Road Lot 1, Latham Subdivision Rifle, CO 81650 The individual sewage disposal system of reference was inspected on November 25, 2004. 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 October 30, 2004. Copies of the engineered plan may be obtained from the undersigned design engineer. Seal -64 Thomas A. Cronk, P.E. 1129 -24- Road Grand Junction, CO 81505 970-245-0577 absorption field consisting of 3 rows of 12 standard Infiltrators (H-10) for a total of 36 units (ea. 36'x75') configured in serial distribution 1000 gallon septic tank LATHAM RESIDENCE LOT 1, LATHAM SUBDIVISION ASBUILT DRAWING NOVEMBER 25, 2004 SCALE 1'=30' NORTH 5.5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 cc CRONK CONSTRUCTION INCORPORATED 1129 -24- Road • Grand Junction, CO 81505 970-245-0577, 970.257.7453 (fax) INDIVIDUAL SEWAGE DISPOSAL SYSTEM DESIGN Date: October 30, 2004 Prepared by: Thomas A. Cronk, P.E. Cronk Construction Inc. 1129 -24- Road Grand Junction, CO 81505 245-0577 Type of Design: New Residence Owner: Kenneth and Marilyn Latham 1985 -293- Road Rifle, CO 81650 970-625-2346 Property address: adjoining to lot 1985 -293- Road, Rifle, CO 81650 Tax schedule No.: Legal Descript: Lot 1, Latham Subdivision Exemption, Garfield County, Colorado Page 1 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1..0 Site History The site consists of approximately 33.7 acres of uncultivated native soil. Drainage is approximately 3% to the southwest in the area of concern. A percolation test/soils evaluation was conducted on the property of reference on 10/28/04 by Tom A. Cronk, registered professional engineer (R.P.E.). The perc excavation trench was located approximately 210' north of the proposed residence. Based on results from the 10/28/04 perc test/soils evaluation, an engineered ISDS has been prepared for the property. The 10/28/04 perc results are attached for reference as Appendix A. The locations of the perc excavations are shown on the attached plot plan. A discussion of developed design parameters and the engineered design follow. 2.0 Development of Design Parameters A perc excavation trench was extended to a depth of 108" below ground surface (BGS). There was no evidence of ground water or high seasonal water table in the open excavation to a depth of 108" BGS. The soils evaluation indicates four distinct soil horizons underlie the site. A lithological description follows: depth (in.) description 0" - 12" 12" - 60" 60" - 80" 80" - 108" clayey sand, brown; blocky; friable clayey sand, reddish brown; friable sandy clay, brown; soft and moldable silty clay, light greenish brown The perc rate of the native soils will be limited by the formation of a biomat at the soil/absorption field interface. To account for the biomat formation, a design perc rate of 25 min/in. is chosen for overall system sizing. Page 2 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1.0 System Design A INFILTRATOR absorption trench is proposed for discharge of septic effluent at the site. Construction of the system will consist of excavating level trenches in the area comprising the absorption field. As shown in the attached septic layout plan, the trenches will be oriented perpendicular (i.e., long axis northwest to southeast) to the natural slope (southwest) to minimize the depth of excavation along the trench length. Each trench excavation shall be continued to a maximum depth of 36" BGS at the uphill side of the trench (see absorption field cross-section). After removal of surface soils, the open excavations will be disked or scarified to promote subsurface absorption. Following completion of the initial push -outs, INFILTRATORS will be used to construct a septic effluent distribution system in the open excavations. The INFILTRATOR effluent distribution system will be installed in accordance with the "Infiltrator Technical Manual", available from Infiltrator Systems Inc., 123 Elm Street, Suite 12, Old Saybrook, Connecticut 06475. Adjacent INFILTRATORS shall be fastened with a minimum of four (4) 3/4" x #8 self -tapping sheet metal or bright brass deck screws to prevent movement and separation during backfilling. Septic effluent will be transferred from the upper trench to each of the adjacent downhill trenches through a serial distribution network as shown in the attached construction details. The serial distribution connections between adjacent trenches will facilitate the saturation of the up hill trench before septic effluent is allowed to flow to each of the adjacent downhill trenches. As shown in the attached Absorption Field Cross Section, the bottom of the INFILTRATOR seepage trenches will be located a maximum of 36" below ground level. The installation will provide 48" of usable infiltration soil between the bottom of each INFILTRATOR trench and the underlying subsoils. After the INFILTRATORS are installed, the absorption field will be covered with a soil cap. The soil cap will consist of approximately 24" (10" minimum required) of native soil. A minimum of 5% slope will be maintained to promote surface run off away from the absorption field. The installer should confirm the feasibility of gravity discharge of sewage effluent from the residence to the absorption field by field verification of assumed design parameters. Assumed design parameters with respect to gravity discharge include: • distance from the sewage pipe at exit from the foundation line to the absorption field - 200' or less, • elevation of the ground surface at entry to the absorption field shall be at least 18" below the invert elevation of the sewage pipe at exit from the foundation line. If field measurements do not confirm these design assumptions, gravity discharge of sewage effluent from the existing residence to the absorption field can not be assured and a lift pump may be required. Please contact the design engineer to address any design modifications necessary for effective operation of the ISDS if the above 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 5 of this document. Finally, 4" clean outs shall be provided at maximum 100' intervals in all effluent lines exceeding 100' in length. Page 3 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 A 1000 gallon septic tank will be installed to provide a minimum of 30 hours retention time for sewage effluent from the proposed three bedroom residence. A non -corrodible Orenco filter (model # FTW0444-36A) 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 size of solids and sludge passing into the absorption fields. The filter must be accessible for cleaning and replacement from the ground surface. As discussed above, INFILTRATOR absorption trenches are proposed to discharge septic effluent to the underlying sub -soils. As shown in the attached graphics, the absorption trenches will consist of three (3) trenches 3' wide x 3' max. deep x 75' long with twelve (12) standard INFILTRATOR H-10 units each for a total of thirty six (36) INFILTRATORS. The absorption field will encompass a gross area of 675 square feet with an effective area (31 sq. ft. allowed area/INFILTRATOR) of 1,116 sq. ft. Alternatively, 55 Quick4 INFILTRATOR units may be used to replace the 36 standard H-10 INFILTRATORS. The 55 Quick4 INFILTRATORS will be configured in three trenches containing 19, 18, and 18 units respectively. Calculations and design parameters used to size the absorption field follow. DESIGN CALCULATIONS AVERAGE FLOW FOR 3 BEDROOM HOME @ 150 GAL.IBEDROOM-DAY 3 X 150 = 450 GALIDAY PEAK FLOW = 150% OF AVERAGE = 675 GAL.IDAY DESIGN PERCOLATION RATE = 25.0 MIN.IINCH A = f WHERE, 5 A = ABSORPTION FIELD AREA Q = PEAK FLOW t = PERC TIME/INCH A = 655 25.0 = 675 SQUARE FEET INCREASE ABSORPTION AREA BY 40% FOR CLOTHES WASHER INCREASE ABSORPTION AREA BY 20% FOR GARBAGE GRINDER DESIGN AREA = 675x 1.6 = 1080 SQUARE FEET SIZE ADJUSTMENT FACTOR OF 0.5 FOR INFILTRATOR TRENCH SYSTEM ADJUSTED AREA = 1080 X 0.5 = 540 SQUARE FEET USE 36 STANDARD (H-10) INFILTRATORS @ 15.50 SQ. FT. EACH FOR TOTAL ABSORPTIVE AREA OF 36 X 15.50 = 558 SQ. FT. ALTERNATIVELY, USE 55 QUICK4 INFILTRATORS @ 9.87 SQ. FT. EACH FOR TOTAL ABSORPTIVE AREA OF 55 X 9.87 = 542.85 SQ. FT. Page 4 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4.0 Site Specific Installation/Operation Requirements The owner and system contractor shall be aware and comply with the following installation and system operation requirements. 4.1 Installation - Setbacks, Notifications, and Inspections • All installation activities shall be conducted in accordance with current Colorado Department of Health ISDS Regulations as well as any relevant Garfield County regulations and requirements. If at any time during construction, subsurface site conditions are encountered which differ from the design parameters developed in Section 2.0, construction activities will stop and the design engineer will be contacted to address any necessary design modifications. • Installation procedures including grade, location, setbacks, septic tank size, and absorption field size shall conform with the attached graphic details. Construction activities and system components will not encroach upon existing easements or utility corridors. A minimum of 6 ft of undisturbed soil shall be maintained between individual absorption elements and the septic tank and/or adjacent absorption elements. Minimum site specific setbacks for system components are: Source Septic Tank Absorption Field Building Sewer water line 10' 25' 10' spring or well 50' 100' 50' dwelling 5' 20' property lines 10' 10' subsoil drains 10' 25' irrigation ditch open 50' 50' lined/gated 25 25' 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 lines and effluent distribution piping shall be 4 inches in diameter and have glued points. INFILTRATORS shall be placed level in the absorption field. All lines discharging sewage from the residence to the septic tank shall maintain fall of between 1/8 in. and 1/4 in. per foot and shall employ sweep 90's or 2-45's at all turns. Sewer lines from the dwelling to the septic tank and at least 6 ft from the septic tank outlet must 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 or flow fill when covered with less than 24" of soil. Page 5 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 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. The installer shall provide 48 hour notice to the engineer for all required inspections. • It is recommended a minimum of 18" of soil cover (10" required) be maintained over all ISDS components to prevent freezing of septic effluent (excepting maximum 8" cover over septic access ports). Four inch clean outs shall be provided at maximum 100' intervals in all effluent lines exceeding 100' in length. • The effluent distribution system shall be constructed in accordance with the "Infiltrator Technical Manual" available from Infiltrator Systems Inc., 123 Elm Street, Suite 12, Old Saybrook, Connecticut 06475. • A non -corrodible Orenco filter (model # FTW0444-36A) 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 size of solids and sludge passing into the absorption field. The filter must be accessible for cleaning and replacement from the ground surface. • Adjacent absorption field trenches shall be connected by a serial distribution system to assure saturation of the upgradient trench before effluent is passed to the adjacent downgradient trench (see attached absorption field plan view and cross section details). • The surface cap shall consist of native soil with a minimum of 5% drainage away from the absorption field 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 construction procedures should be employed during installation to minimize disturbance to native soils: 1. 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 between the hands it is too wet and should be allowed to dry before excavation continues. 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 excavation by hand if necessary. iv. Care should be taken in placing fill materials in the excavation to avoid damaging the exposed soil surfaces. Page 6 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4.2 Operation - Maintenance and Inspections • The owner shall install a structural barrier if necessary and take precautions to prevent vehicular traffic, excessive surface watering, accidental flooding, or other activities in 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 7 of 8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 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 circumstances is not an appropriate application of this document. This report is a product of Cronk Construction Incorporated and is to be taken 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 from 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 warranty or representation either expressed or implied is included or intended in this report or in any of our contracts. SEAL Thomas A. Cronk, P.E. tkct Date 3 j 11514 NOTE: This individual sewage disposal plan is meant to include the following four pages of graphics including: 1) plot plan, 2) septic layout plan, 3) absorption field plan view, and 4) absorption field cross section. The plan is not to be implemented in the absence of these related graphics. In addition, results from the percolation test and soils evaluation are included for reference as Appendix A. Page 8 of 8 N89°43'44'E 1327 20 per- test. excavation N00'00'001E 156645' X142 5' proposed residence spring/well n NL 281. a 0 337 acres existing residence on Lot 2, address of 1985 -293- Road Rifle, CO 81650 LATHAM RESIDENCE LOT 1, LATHAM SUBDIVISION PLOT PLAN OCTOBER 29, 2004 SCALE t'=200' NORTH S00102'.017'W 101697' 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 25'mm ?Ton - minimum 100' separation to well or spring Ae NOTE CALL 1-800-922-1987 FOR UTILITY LOCATES BEFORE EXCAVATING NOTE GRAVITY DISCHARGE OF SEWAGE EFFLUENT FROM THE RESIDENCE TO THE DISPOSAL SYSTEM IS BASED ON THE FOLLOWING DESIGN ASSUMPTIONS LENGTH OF SEWAGE PI°ING FROM EX:T AT FOUNDATION LINE TO ENTRY TO ABSORPTION FIELD = 200' ER LESS ELEVATION OF GROUND SURFACE AT ENTRY TO ABSORPTION FIELD = AT LEAST 18' BELOW INVERT ELEVATION OF SEWAGE PIPE AT EXIT FROM FOUNDA"ION LINE DISCLAIMER IF 'HESE DESIGN ASSUMPTIONS ARE NOT UPHELD DURING CONSTRUCTION, GRAVITY DISCHARGE SAN NOT BE ASSURED AND A LIFT STATION MAY BE REQUIRED NOTE PROVIDE 4' CLEAN OUTS AT MAXIMUM 100' INTERVALS IN AL.. EFFLUENT LINES EXCEEDING 100' IN LENGTH NOTE ABANDON FLOOD IRRIGATION WITHIN 50' OF ANY 1505 ELEMENT, TYPICAL 4 36 standard infiltrator units (H-10) conFigured in serial distribution as 3 rows of 12 units each row \11110%as ws of19, 18, and 1units 8 ch row.o ana4vety55 4 mamts ed in serial distribution repair ore 1,000 gaL.on septic tank with OSI eFFluent filter Model 11 °TW0444-36A clean out provide 4' clean outs at max 100' intervals In o4 effluent lines exceeding 100' in length 1 3 3 5 LATHAM RESIDENCE LOT I, LATHAM SUBDIVISION SEHTIC LA°OU- PLAN OCTOBER 3C, 2004 SCALE 1"=40' NER'H proposed residence J NOTE THE FOLLOWING SETBACKS MUST BE MAINTAINED SEPTIC TANK ABSORPTION FIELD SPRINGS 50' 100' WELLS 50 100' CIST=RN 25 25' STREAM 50 50' DOMESTIC WATER LINE — 10' 25' d stern 1 1 1 1 1 1 1 1 1 ' a 1 1 1 1 1 1 1 1 1 36 standard infiltrator units (H -I0) configured in sera( distribution as 3 rows of 12 units each row or alternatively 55 Ouck4 infiltrator units configured In serial distribution as 3 rows of 19, 18 and 18 units each row 75' For H-10 configuration— / (78' to 82'-4' for du'ck4 configuration) c --, • � 6' min, 10'-12' recommended, typ I serial dstribution con Figur tion, alternate end-to-end, typ -7 provide inspection/venting ports at each eno of mfitrator trenches as shown • I- ABSORPTION FIELD - PLAN VIEW SCALE! 1'=10' LATHAM RESIDENCE LOT I, LATHAM SUBDIVISION ABSORPTION FIELD - PLAN VIEW OCTOBER 30, 2004 SCALE 1"=20' septic r81upnt co ti 00 N - existing gr olnor sU re e aL Ti S 0 a i y 't 4 '+ U o Y a Y �' V No �y{ ECr 0 NE 0 Eu K Z v a 0 pa N u Z '. c.= O a U W 0 0 N W Cci O W zEa z vo ¢�Y v £ N N ¢ „ VU N" NW O Z 2 5 0 y 0 0 CU0UY N 0 0 0 N 0 o m O 0 ,c.o 2 c N 7.°J Z 0 1- 0 N O 1 16. 1 ~ J W L Z ce0 1- 0 0 Q z 0 V N Z N = 5; ju 0 m O N A es ,00131 -0 W Z O K ¢ O N ti lY Z 0. W Q _ 2^ 0 Lu O O J ¢ Q -J m[0 U JV JQZVI 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 APPENDIX A SOILS AND PERCOLATION REPORT CRONK CONSTRUCTION INCORPORATED 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CRONK CONSTRUCTION INCORPORATED 1129 .24- Road • Grand Junction, CO 81505 970.245.0577, 970.257.7453 (fax) SOILS AND PERCOLATION REPORT Date: October 28, 2004 Prepared by: Client: Thomas A. Cronk, P.E. 1129 -24- Road Grand Junction, CO 81505 245-0577 Kenneth and Marilyn Latham 1985 -293- Road Rifle, CO 81650 (970) 625-2346 Property address: adjoining to lot 1985 -293- Road, Rifle, CO 81650 Tax schedule No.: Legal Descript.: Lot 1, Latham Subdivision Exemption 1.0 Soils Evaluation The site consists of approximately 33.7 acres of uncultivated native soil. Drainage is approximately 3% to the southwest in the area of concem. A percolation test/soils evaluation was conducted on the property of reference on 10/28/04 by Tom A. Cronk, registered professional engineer (R.P.E.). The perc excavation trench was located approximately 210' north of the proposed residence. A perc excavation trench was extended to a depth of 108" below ground surface (BGS). There was no evidence of ground water or high seasonal water table in the open excavation to a depth of 108" BGS. The soils evaluation indicates four distinct soil horizons underlie the site. A Iithological description follows: depth (in.) description 0" - 12" 12" - 60" 60" - 80" 80" - 108" clayey sand, brown; blocky; friable clayey sand, reddish brown; friable sandy clay, brown; soft and moldable silty clay, light greenish brown Perc holes were constructed at the surface and at depths of approximately 36 in. and 72 in. The holes appeared to be well saturated at the time of the test. Results of the percolation test are shown in Table 1. Page A-1 of A-3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 TABLE 1 Percolation Test Results Lot 1, Latham Subdivision Exemption Depth Time on 10/28/04 Time Perc Rate min/in 15:04 15:44 16-04 Drop 2.625 3.25 3.5 60/0.875 69 2.0 5.375 6 75 60/4 75 13 3.375 5 75 7.0 60/3 625 17 2.0 Conclusions and Recommendations Soils at the site appear acceptable for implementation of an individual sewage disposal system (ISDS). The following site-specific considerations should be observed during implementation of the ISDS: • The bottom of the ISDS absorption field should be located no deeper than 60" BGS to maintain 4' of usable infiltration soil above the extent of the soils observation excavation located at 108" BGS. A design pert rate of 25 min/in. is recommended for overall system sizing to account for the formation of a biomat on infiltrative soil surfaces. • Care should be taken during construction 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 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3.0 Lirhitations 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 (irrigation or pond construction) and naturally occurring (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 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 warranty or representation either expressed or implied is included or intended in this report or in any of SEAL —TIC' 6,9 our contracts. J Thomas A. Cronk, P.E. Page A-3 of A-3 Date