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HomeMy WebLinkAboutOWTS Soils ReportGnnTIELD CcuNTY OWTS SoIIs RrpoRT 33 MnBLE LRNr, Srrr Gnnr¡ELD CouNTY, ColonADo April 2023 Prepared bygSGM l8 WEST SrxrH Srneer, SulTE 2OO GleNwooo SpRrNcs, CO A l60 I 970.945. t OO4 970.945.5948 FAX GnnnELD CouNrY OWTS SorLS REPoRT 33 MnBLE Lnrur, SrLT GnnnELD Colonnoo "l hereby affirm that this Onsite Wastewater Treatment System (OWTS) report for 33 Mable Lane, Silt, Colorado was prepared by me, or under my direct supervision, for the Owners thereof in accordance with the provisions of Garfield County's OWTS Regulations and approved variances and exceptions listed thereto. I understand the County does not and will not assume liability for OWTS facilities designed by others." License No Lice rofessional Engineer, State of Colorado (Affix Seal) PRepRReo By: JerreRgv S. Slrrlorusoru, PE SGM Project # CAP 2 äs1 52 s/4/23 Tnslr or Co¡.rrENTS 1.0 lntroduction 2.0 Preliminary lnvestigation 2.1 Property lnformation 2.2 Topography 2.3 Soil Data 2.4 Location of Physical Features 2.5 Additionallnformation 2.6 Landscape Position 2.7 Natural and Cultural Features 2.8 Current and Historic Land Use 3.0 Detailed Soil lnvestigation 3.1 Visual Evaluation 3.2 Tactile Evaluation 4.0 Limitations 6 6 6 6 6 7 7 7 7 7 7 7 I I 4 Appendix Existing Conditions Map NRCS Soils Report NRCS Textural Trianqle SGN/ Soil Ribbon Photos HP Geotech Soils Report of 2002 5 1.0 lntroduction The subject property at 33 Mable Lane is on a 312 acre parcel located north and west of the intersection of Mable Lane and Ukele Lane. The original OWTS for this property was constructed in 2002 under permit number 3728. This original construction was a chambered trench installation (21 units in total). The system design was based upon the 3 bedroom home and a percolation rate performed by Garfield County. This percolation rate was determined to be 12 minutes per inch. This past quarter, the current owners of the property have experienced constant back ups of fluid from the soil treatment area and now are preparing to replace the soil treatment area with a newer system consisting of chambers and constructed in a "bed" format. lt is the purpose of this report to identify the soil type and long term acceptance rate based on a visual and physical soil evaluation of the on-site soils. 2.0 Frelim¡nary I nvestigation 2.1 Property Information 33 Mable Lane. Silt, Colorado Tract 39A. Antlers Orchard Subdivision. Garfield Countv. Colorado Existino Structures: 4 Bedroom Home Domestic Water: On site well Sepfic; 1250 gallon septic tank with chambered trench soil treatment area 2.2 Topography Topography in the vicinity of the new OWTS slopes from the southeast to the northwest at grades between 8 to 10 percent. 2.3 Soil Data According to the Web Soil Survey for the Natural Resources Conservation Service (NRCS) soils associated with the subject property are classified as map unit Potts Loam. NRCS soil unit number 56, which is Potts Loam has grades between (6 to 12) percent. This does agree with field observations. NRCS soil data indicates the Potts Loam Soils are acceptable for septic tank absorption fields. Visual observation of the soils in the excavated test pits indicated the soils have blocky, moderately weak characteristics. Plotting the percentages of clay, sand and silt published by the NRCS for this soil unit on the USDA Textural Triangle indicates the soils would classify as a Clay Loam, soil type 24. Soils having a classification type of 2A are suitable for absorption fields, having a long-term application rate (LTAR) of 0.50 gallons per day per square foot of area (gpd/ft2. 6 2.4 Location of Physical Features Physicalfeatures on the subject property that will require minimum horizontal setbacks are shown in the following Table. All distances are in feet. Potable Water Supply Line 10 5 STA 25 20 10 5 2.5 Additional Information a. Easements; N/A b. Floodplain Maps: N/A 2.6 Landscape Position The landscape position for the STA is considered on a summit. The slope shape is linear towards the northwest. 2.7 Natural and Cultural Features 2.8 Gurrent and Historic Land Use The subject property is in Garfield County's AgriculturalZone. Current and historic use has been agricultural with the future to remain unchanged. 3.0 Detailed Soil lnvestigation A detailed soil investigation to determine the depth to the limiting layer, if any, and properly classify the soil type was conducted on April 28, 2023. Visual evaluation of two soil profile test pits were conducted in the field and samples collected from each test pit. The soil texture by feel method was utilized in the field to classify the soil type that will receive wastewater effluent. Test pits were excavated adjacent to the proposed location for the STA expansion and/or rehabilitation. The attached existing conditions map identifies the locations of the test holes. Visual evaluation of þoth test pits was conducted under adequate light conditions, with the soil being in an unfrozen state. 3.1 Visual Evaluation Two test pits were excavated by the Owner prior to SGM personnel being on site. The test pits were labeled by SGM personnel as TP-1 andTP-2. Test pit TP-1 exhibited medium brown clayey, silty, sandy loam with a fair amount of moisture in the soil. A ball could be formed but not shaped into a rope. Roots existed in the upper 30-36" of the test hole. The existing lnfiltrator chambers were at a depth of 42" below grade. Af 5-7' , a light brown clayey, silty, sandy loam existed. Soil was blocky with moderate structure grade and was dry. 7 Structure with Basement, Crawl Space, Footing Drains Property Lines Septic Tank Septic Tank Effluent Line 5 0 '10 10 Test pit TP-2 exhibited a light brown clayey, silty, sandy loam, that was dry. This soil, too, was blocky with moderate structure grade. No rock was encountered in either test pits, by visual observation, thus their percentages were determined to be less than 35 percent. Excavation was terminated at a depth of 7 feet for TP-1 and 6.5 feet for TP-2. Neither pit showed signs of: ¡ A limiting layer,¡ Presence of groundwater Soil observation logs and photos can be found in the Appendix. All measurements are from ground surface. 3.2 Tactile Evaluation On April 29, 2023 SGM conducted the soil textural by feel evaluation on the soil samples collected during the visual evaluation of the test pits. Results of the soil gradation revealed: 1. Total sample size = 1 gallon; both samples 2. Volume of rock > 35 mm (314") = go¡o 3. Volume of rock > 2 mm (0.079") = 9o¿4. Percent rock in sample = 0% Soils are not type "R". Performing the soil texture by feel methodology on the non-rock portion of the sample are shown in the following table. *Weak < 1 inch; Moderate 1-2 inches; Strong > 2 inches Mapping NRCS soilgradation onto the TexturalTriangle included with Table 10-1, section 43.10 of Reg43, the NRCS Potts Loam falls in the Type 2A soil classification with blocky, weak structure. I SAMPLE Sample Depth from Ground Surface lft) Does Soil Form a Ball (yes/no) Does Soil Form a Ribbon (ves/no) *Type of Ribbon Formed (Weak, Moderate, Stronq) How Does the Soil Feel (G ritty/S mooth/Neithe r) TH-1 42"Yes Yes Weak e Neither TH-2 42"Yes Yes Weak e Neither 4.0 Limitations Our investigation, layout, design, and recommendations are based on site visits and the best information available at the time. The contents of this letter shall not serve as the basis for any third party engineering design. lf conditions that are considerably different from those described in this report are encountered, SGM shall be called to evaluate the conditions. lf the proposed construction is changed, SGM shall be notified to evaluate the effect of the changes on the OWTS prior to the changes being made. All construction shall be in accordance with the Garfield County OWTS Regulations. Pipe type and size, burial requirements, septic tank construction, and other specifications, which are not depicted in our report, shall conform to the requirements of the County's OWTS Regulations. The installer of the system shall be acceptable by the County's Environmental Health Department. I Appendix Existing Gonditions Map NRCS Soils Report NRCS Textural Triangle SGM Soil Ribbon Photos HP Geotech Soils Report of 2AA2 10 USDA - United States Department of Agriculture NRCS Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Gustom Soil Resource Report for Rifle Area, Golorado, Parts of Garfield and Mesa Counties Paulson OWTS May 4,2023 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases, Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/n rcs/mai n/soi lsihealth/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://wwwnrcs.usda. gov/wpsiportal/nrcs/detail/soils/contactus/? cid=nrcs1 42p2_05395 1 ), Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies, The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. lnformation about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information, The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parentalstatus, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center al (202)720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 lndependence Avenue, S.W., Washington, D.C.20250-9410 or call (800) 795-3272 (voice) or (202) 72A-6382 (TDD). USDA is an equal opportunity provider and employer. 3 Gontents Map Unit Descriptions (Paulson OWTS)....... Rifle Area, Colprado, Parts of Garfield and Mesa Counties 54-Potts loam, 1 to 3 percent slopes.. 56-Potts loam, 6 to 12 percent slopes Soil Information forAll Uses.,.. Soil Reports. Soil Physical Properties Physical Soil Properties (Paulson OWTS)..,,.,. Engineering Properties (Paulson OWTS),.,..... ..2 .5 .6 ..7 ..9 .9 11 11 12 13 13 13 13 17 4 Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit, 5 N¿zc2438158043815904381600438'161043816204381ô304381560I43815/0107þ 40' 44',Wr07. 40' 44" W>>=àìFHaHËàlaàHHÉàìaINËàleà'ìIBàlEàìatsHaH3oÞ6ß0-fóoÞf,=fl3dlôHEXPtEf@,l-.I3oooıoqãq3od6BIıga=ùtr3ô6fa@od,?E?NQôzã6)6r3ô6ıoUDC^a:o<3€g^:JæcOØ9.oxJ-o8án-.{ oU)PvOf(')à,tE-ENgàìEoàìEnH4381630438'1550N¿z;c21070 40' 39',WàìË43816æ4381610438160043815S438158043815-/043815601070 40 39'w Custom Soil Resource ReportMAP LEGENDMAP INFORMATIONThe soil surveys that comprise your AOI were mapped at1:24,000.Please rely on the bar scale on each map sheet for mapmeasurements-Source of Map: Natural Resources Conservation ServiceWeb Soil Survey URL:Coordinate System: Web Mercator (EPSG:3857)Maps from the Web Soil Survey are based on the Web Mercatorprojection, which preserves direction and shape but d¡stortsdistance and area. A projection that preserves area, such as theAlbers equal-area conic projection, should be used if moreaccurate calculations of distance or area are required.This product is generated from the USDA-NRCS certified data asof the version date(s) listed below.Soil Survey Area: Rifle Area, Colorado, Parts of Garfield andMesa CountiesSurvey Area Data: Version 15, Sep 6, 2022Soil map unils are labeled (as space allows) for map scales1:50,000 or larger.Date(s) aerial images were photographed: Aug 25, 2021-Sep5,2021The orthophoto or other base map on which the soil lines werecompiled and digitized probably differs from the backgroundArea of lnterest (AOl)I Area of lnterest (AOl)Soils] Soil Map Unit PolygonsÊ**r Soil Map Unit LinesI Soil Map Unit PointsSpecial Point Features(Ð BlowoutH¡ Borrow PitH Clay Spol+ Closed DepressionX Gravel Pitf. Gravelly Spot* Landfill,t Lava Flowdh Marsh or swampm Mine or Quarry6 Miscellaneous Water6 Perennial Water\S Rock Outcrop+ Saline Spot;.: sandy spot€ Severely Eroded SpotS S¡nkholeþ Slide or Slipø Sodic SpotË Spoil Areaü Stony Spotß VeryStonySpotq Wet spot.,4 Other.- Special Line FeaturesWater FeaturesStreams and CanalsTransportat¡onH-+ Rails# lnterstate Highways*q'/d US Routes..r.:.. Major Roads' Local RoadsBackgroundI Aerial Photography7Warning: Soil Map may not be valid at this scale.Enlargement of maps beyond the scale of mapping can causem¡sunderstanding of the detail of mapping and accuracy of soilline placement. The maps do not show the small areas ofcontrasting soils that could have been shown at a more detailedscale. Custom Soil Resource ReportMAP LEGENDMAP INFORMATIONimagery displayed on these maps. As a result, some minorofunit boundariesbe evident.I Custom Soil Resource Report Map Unit Legend (Paulson OWTS) Map Unit Descriptions (Paulson OWTS) The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the propefties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a padicular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components, They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. lf included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed., and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify allthe soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. lf intensive use of small areas is planned, however, I Map Unit Symbol Map Unit Name Acres ¡n AOI Percent of AOI 54 Potts loam, 1 to 3 percent slopes 1.8 99.9% 56 Potts loam, 6 to 12 percent slopes 0.0 0.1% Totals for Area of lnterest 1.8 100.0% Custom Soil Resource Report onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a so/ senes. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided inlo soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An assocrafion is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. 10 Custom Soil Resource Report Rifle Area, Colorado, Parts of Garfield and Mesa Counties S4-Potts loam, I to 3 percent slopes Map Unit Setting National map unit symbol: jnyq Elevation: 5,000 to 7,000 feet Farmland classification: Prime farmland if irrigated Map Unit Composition Potts and similar so/s: 85 percent Estimates are based on observations, descriptions, and fransecfs of the mapunit. Description of Potts Setting Landform: Mesas, benches, valley sides Down-slope shape: Convex, linear Across-s/op e shape : Convex, linear Parent material: Alluvium derived from basalt and/or alluvium derived from sandstone and shale Typical profile H1 -0to4inches: loam H2 - 4 to 28 inches: clay loam H3 - 28 to 60 inches.' loam Properties and qualities S/ope:lto3percent Depth to restrictive feature: More than 80 inches Drainage c/ass.' Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat); Moderately high (0.20 to 0.60 in/hr) Depth to water table: \liore than B0 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: l5 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply,0 to 60 inches: High (about 10.3 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 3c Hydrologic Soil Group: C Ecologicalsife; R04BAY306UT - Upland Loam (Wyoming Big Sagebrush) Hydric soil rafing: No 11 Custom Soil Resource Report 56-Potts loam, 6 to 12 percent slopes Map Unit Setting National map unit symbol: jnys Elevation: 5,000 to 7,000 feet Farmland classification: Farmland of statewide importance Map Unit Composition Potts and similar so/s; 85 percent Estimates are based on obseruations, descriptions, and transects of the mapunit. Description of Potts Setting Landform: Mesas, benches, valley sides Down-slope shape: Convex, linear Across-s/op e shape : Convex, linear Parent material: Alluvium derived from basalt and/or alluvium derived from sandstone and shale Typical profile H1 -0to4inches: loam H2 - 4 to 28 inches: clay loam H3 - 28 to 60 inches: loam Properties and qualities S/ope: 6 to 12 percent Depth to restrictive feature: More than 80 inches Drainage c/ass; Well drained Runoff class; High Capacity of the most limiting layer to transmit water (Ksat); Moderately high (0.20 to 0.60 in/hr) Depth to water table: \llore than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: High (about 10.3 inches) lnterpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecologicalsife: R04BAY306UT - Upland Loam (Wyoming Big Sagebrush) Hydric soil rating: No 12 So Information for All Uses Soil Reports The Soil Reports section includes various formatted tabular and narrative reports (tables) containing data for each selected soil map unit and each component of each unit. No aggregation of data has occurred as is done in reports in the Soil Properties and Qualities and Suitabilities and Limitations sections. The reports contain soil interpretive information as well as basic soil properties and qualities. A description of each report (table) is included. Soil Physical Properties This folder contains a collection of tabular reports that present soil physical properties. The reports (tables) include all selected map units and components for each map unit. Soil physical properties are measured or inferred from direct observations in the field or laboratory. Examples of soil physical properties include percent clay, organic matter, saturated hydraulic conductivity, available water capacity, and bulk density. Physical Soil Properties (Paulson OWTS) This table shows estimates of some physical characteristics and features that affect soil behavior. These estimates are given for the layers of each soil in the survey area. The estimates are based on field observations and on test data for these and similar soils. Depth to the upper and lower boundaries of each layer is indicated. Particle size is the effective diameier of a soil particle as measured by sedimentation, sieving, or micrometric methods. Particle sizes are expressed as classes with specific effective diameter class limits. The broad classes are sand, silt, and clay, ranging from the larger to the smaller. Sand as a soil separate consists of mineral soil particles that are 0.05 millimeter to 2 millimeters in diameter. ln this table, the estimated sand content of each soil layer is given as a percentage, by weight, of the soil material that is less than 2 millimeters in diameter. S/f as a soil separate consists of mineral soil particles that are 0.002 to 0.05 millimeter in diameter. ln this table, the estimated silt content of each soil layer is 13 Custom Soil Resource Report given as a percentage, by weight, of the soil material that is less than 2 millimeters in diameter. Clay as a soil separate consists of mineral soil particles that are less than 0.002 millimeter in diameter. ln this table, the estimated clay content of each soil layer is given as a percentage, by weight, of the soil material that is less than 2 millimeters in diameter. The content of sand, silt, and clay affects the physical behavior of a soil. Particle size is important for engineering and agronomic interpretations, for determination of soil hydrologic qualities, and for soil classification. The amount and kind of clay affect the fertility and physical condition of the soil and the ability of the soil to adsorb cations and to retain moisture. They influence shrink- swell potential, saturated hydraulic conductivity (Ksat), plasticity, the ease of soil dispersion, and other soil properties. The amount and kind of clay in a soilalso affect tillage and earthmoving operations. Moist bulk density is the weight of soil (ovendry) per unit volume. Volume is measured when the soil is at field moisture capacity, that is, the moisture content at 113- or 1110-bar (33kPa or lOkPa) moisture tension. Weight is determined after the soil is dried at 105 degrees C. ln the table, the estimated moist bulk density of each soil horizon is expressed in grams per cubic centimeter of soil material that is less than 2 millimeters in diameter. Bulk density data are used to compute linear extensibility, shrink-swell potential, available water capacity, total pore space, and other soil properties. The moist bulk density of a soil indicates the pore space available for water and roots. Depending on soil texture, a bulk density of more than 1.4 can restrict water storage and root penetration. Moist bulk density is influenced by texture, kind of clay, content of organic matter, and soil structure. Saturated hydraulic conductivity (Ksat)refers to the ease with which pores in a saturated soil transmit water. The estimates in the table are expressed in terms of micrometers per second. They are based on soil characteristics observed in the field, particularly structure, porosity, and texture. Saturated hydraulic conductivity (Ksat) is considered in the design of soil drainage systems and septic tank absorption fields. Available water capacity refers to the quantity of water that the soil is capable of storing for use by plants. The capacity for water storage is given in inches of water per inch of soil for each soil layer. The capacity varies, depending on soil properties that affect retention of water. The most important properties are the content of organic matter, soil texture, bulk density, and soil structure. Available water capacity is an important factor in the choice of plants or crops to be grown and in the design and management of irrigation systems. Available water capacity is not an estimate of the quantity of water actually available to plants at any given time. Linear extensibility refers to the change in length of an unconfined clod as moisture content is decreased from a moist to a dry state. lt is an expression of the volume change between the water content of the clod al1l3- or 1110-bar tension (33kPa or 1OkPa tension)and oven dryness. The volume change is reported in the table as percent change for the whole soil. The amount and type of clay minerals in the soil influence volume change. Linear extensibility is used to determine the shrink-swell potential of soils. The shrink-swell potential is low if the soil has a linear extensibility of less than 3 percent; moderate if 3 to 6 percent; high if 6 to 9 percent; and very high if more than 9 percent. lf the linear extensibility is more than 3, shrinking and swelling can cause 14 Custom Soil Resource Report damage to buildings, roads, and other structures and to plant roots. Special design commonly is needed. Organic matter is the plant and animal residue in the soil at various stages of decomposition. ln this table, the estimated content of organic matter is expressed as a percentage, by weight, of the soil material that is less than 2 millimeters in diameter. The content of organic matter in a soil can be maintained by returning crop residue to the soil. Organic matter has a positive effect on available water capacity, water infiltration, soil organism activity, and tilth. lt is a source of nitrogen and other nutrients for crops and soil organisms. Erosion factors are shown in the table as the K factor (Kw and Kf) and the T factor. Erosion factor K indicates the susceptibility of a soil to sheet and rill erosion by water. Factor K is one of six factors used in the Universal Soil Loss Equation (USLE) and the Revised Universal Soil Loss Equation (RUSLE) to predict the average annual rate of soil loss by sheet and rill erosion in tons per acre per year. The estimates are based primarily on percentage of silt, sand, and organic matter and on soil structure and Ksat. Values of K range from 0.02 to 0.69. Other factors being equal, the higher the value, the more susceptible the soil is to sheet and rill erosion by water. Erosion factor Kw indicates the erodibility of the whole soil. The estimates are modified by the presence of rock fragments. Erosion factor Kf indicates the erodibility of the fine-earth fraction, or the material less than 2 millimeters in size. Erosion factor f is an estimate of the maximum average annual rate of soil erosion by wind and/or water that can occur without affecting crop productivity over a sustained period. The rate is in tons per acre per year. Wind erodibility groups are made up of soils that have similar properties affecting their susceptibility to wind erosion in cultivated areas. The soils assigned to group 1 are the most susceptible to wind erosion, and those assigned to group 8 are the least susceptible. The groups are described in the "National Soil Survey Handbook." Wind erodibility index is a numerical value indicating the susceptibility of soil to wind erosion, or the tons per acre per year that can be expected to be lost to wind erosion. There is a close correlation between wind erosion and the texture of the surface layer, the size and durability of surface clods, rock fragments, organic matter, and a calcareous reaction. Soil moisture and frozen soil layers also influence wind erosion. Reference: United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-Vl. (http://soils.usda.gov) 15 Custom Soil Resource ReportThree values are provided to identify the expected Low (L), Representative Value (R), and High (H).Physlcal Soil Properties-Rifle Area, Colorado, Parts of Garfield and Mesa CountiesWinderodibilityindex5656Winderodibilitygroup55ErosionfactorsT55Kf373237.37.ó¿.37Kw373237.37.32.37OrganicmatterPct1.0- 1.5-2.O0.5- 0.8-1.00.0- 0.3-0.51.0- 1.5-2.00.5- 0.8-1.00.0- 0.3-0.5LinearextensibilityPct0.0- 1.5- 2.93.0- 4.5- 5.90.0- 1.5- 2_90.0- '1.5- 2.93.0- 4.5- 5.90.0- 1.5- 2.9AvailablewatercapacityIn/ln0.14-0.16-0.'l70.17-0.19-0.200-14-0-16-0.170.1 4-0.1 6-0.170.17-0.19-0.200.1 4-0.1 6-0.17Saturatedhydraulicconductivitymicro m/sec4.23-23.28-42.341.41-2.82-4.234.23-23.28-42.344.23-23.28-42.341.41-2.82-4.234.23-23.28-42.34Moistbulkdensityg/cc1.25-1.33-1.401.25-1.33-1401.25-1.33-1.401.25-1 .33-1.401.25-1.33-1.401.25-1 .33-1.40ClayPct10-15- 2027-31- 3415-20- 2510-15- 2027-31- 3415-20- 25s¡ttPct41--Jb--38--41--36--38-SandPct-44--33--42--44--33--42-DepthIn0-44-2828-600-44-2828-60Map symboland soil nameS4-Potts loam,1 to 3 percentslopesPotts56-Potts loam,6to 12percentslopesPottsl6 Custom Soil Resource Report Engineering Propert¡es (Paulson OWTS) This table gives the engineering classifications and the range of engineering properties for the layers of each soil in the survey area. Hydrologic soil group is a group of soils having similar runoff potential under similar storm and cover conditions. The criteria for determining Hydrologic soil group is found in the National Engineering Handbook, Chapter 7 issued May 2007(http:ll directives.sc.egov.usda.gov/OpenNonWebContent.aspx?contenl=17757 .wba). Listing HSGs by soil map unit component and not by soil series is a new concept for the engineers. Past engineering references contained lists of HSGs by soil series. Soil series are continually being defined and redefined, and the list of soil series names changes so frequently as to make the task of maintaining a single national list virtually impossible. Therefore, the criteria is now used to calculate the HSG using the component soil properties and no such national series lists will be maintained. All such references are obsolete and their use should be discontinued. Soil properties that influence runoff potential are those that influence the minimum rate of infiltration for a bare soil after prolonged wetting and when not frozen. These properties are depth to a seasonal high water table, saturated hydraulic conductivity after prolonged wetting, and depth to a layer with a very slow water transmission rate. Changes in soil properties caused by land management or climate changes also cause the hydrologic soil group to change. The influence of ground cover is treated independently. There are four hydrologic soil groups, A, B, C, and D, and three dual groups, A,/D, B/D, and C/D. ln the dual groups, the first letter is for drained areas and the second letter is for undrained areas. The four hydrologic soil groups are described in the following paragraphs: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. Depth to the upper and lower boundaries of each layer is indicated. Texture is given in the standard terms used by the U.S. Department of Agriculture. These terms are defined according to percentages of sand, silt, and clay in the fraction of the soil that is less than 2 millimeters in diameter. "Loam," for example, is soil that is 7 to 27 percent clay,28 to 50 percent silt, and less than 52 percent sand. lf the content of particles coarser than sand is 15 percent or more, an appropriate modifier is added, for example, "gravelly." 17 Custom Soil Resource Report Classification of the soils is determined according to the Unified soil classification system (ASTM, 2005) and the system adopted by the American Association of State Highway and Transportation Officials (AASHTO, 2004). The Unified system classifies soils according to properties that affect their use as construction material. Soils are classified according to particle-size distribution of the fraction less than 3 inches in diameter and according to plasticity index, liquid limit, and organic matter content. Sandy and gravelly soils are identified as GW, GP, GM, GC, SW, SP, SM, and SC; silty and clayey soils as ML, CL, OL, MH, CH, and OH; and highly organic soils as PT. Soils exhibiting engineering properties of two groups can have a dual classification, for example, CL-ML. The AASHTO system cfassifies soils according to those properties that affect roadway construction and maintenance. ln this system, the fraction of a mineral soil that is less than 3 inches in diameter is classified in one of seven groups from A-1 through A-7 on the basis of particle-size distribution, liquid limit, and plasticity index. Soils in group A-1 are coarse grained and low in content of fines (silt and clay). At the other extreme, soils in group A-7 are fine grained. Highly organic soils are classified in group A-8 on the basis of visual inspection. lf laboratory data are available, the A-1 , A-2, and A-7 groups are further classified as A-1-a, A-1-b, A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, or A-7-6. As an additional refinement, the suitability of a soil as subgrade material can be indicated by a group index number. Group index numbers range from 0 for the best subgrade material to 20 or higher for the poorest. Percentage of rock fragments larger than 10 inches in diameter and 3 to 10 inches in diameter are indicated as a percentage of the total soil on a dry-weight basis. The percentages are estimates determined mainly by converting volume percentage in the field to weight percentage. Three values are provided to identify the expected Low (L), Representative Value (R), and High (H). Percentage (of soil particles) passrng designated sieves is the percentage of the soil fraction less than 3 inches in diameter based on an ovendry weight. The sieves, numbers 4, 10, 40, and 200 (USA Standard Series), have openings of 4.76,2,00, 0,420, and 0.074 millimeters, respectively. Estimates are based on laboratory tests of soils sampled in the survey area and in nearby areas and on estimates made in the field. Three values are provided to identify the expected Low (L), Representative Value (R), and High (H). Liquid limit and plasticity lndex (Atterberg limits) indicate the plasticity characteristics of a soil. The estimates are based on test data from the survey area or from nearby areas and on field examination. Three values are provided to identify the expected Low (L), Representative Value (R), and High (H). References: American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. 18 Custom Soil Resource ReportAbsence of an entry indicates that the data were not estimated. The asterisk '*' denotes the representative texture; otherpossible textures follow the dash. The criteria for determining the hydrologic soil group for individual soil components isfound in the National Engineering Handbook, Chapter 7 issued May 2007(http://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?content=17757.wba). Three values are provided to identify the expected Low (L),Representative Value (R), and High (H).Englneerlng Properties-Rlfle Area, Golorado, Parts of Garfield and Mesa Count¡esPlasticity indexL-R-H5-8 -1010-15-205-8 -105-8 -1010-15-205-8 -10LiquidlimitL-R-H25-28-3030-35-4025-28-3025-28-3030-354025-28-30Percentage passing sieve number-200L-R-H60-68-7570-75-8060-68-7560-68-7570-75-8060-68-7540L.R-H85-90-9590-95-10085-90-9585-90-9590-95-10085-90-9510L-R-H1 00-1 00-1001 00-1 00-1 001 00-1 00-1 00't00-'t 00-1 001 00-1 00-1001 00-1 00-1004L-R-H1 00-1 00-l 001 00-1 00-1001 00-1 00-1001 00-1 00-100100-'100-1 001 00-l 00-100Pct Fragments3-10inchesL-R-H0-0-00-0-00-0-00-0-00-0-00-0-0>10inchesL-R-H0-0-00-0-00-0-00-0-00-0-00-0-0GlassificatlonAASHTOA4A-6N4A-4A-6A-4UnifiedCL.ML,CLCLCL-MLCLCL-ML,CLCLCL-ML,CLUSDA textureLoamClay loamLoamLoamClay loamLoamDepthIn044-2828-600-44-2828-60Hydrolog¡cgfoupccPct. ofmapunit85B5Map unit symbol andsoíl nameS4-Potts loam, 1 to 3percent slopesPotts56-Potts loam, 6 tol2 percent slopesPotts19 BASED ON REGULATION 43 TABLE 1O-1 For Soils with Less Than 35 Percent Rock Fragments. Rock Fragments are larger than 2 millimeters' soil Treatment Area Long Term Acceptance Rates by soil Texture, soil structure, Percolation Rates and rreatment level Long-term Acceptance Rate ([ day per square foot TAR) Gallons perSoil Type, Texture, Structure and Percolation Rate Range Level 3N1* Tfeatment Level 2N1 Treatment Level 31 Treatment Level 21 TreatmentPercolation Rate (MPl)Level 11 TreatmentUsDA so¡l Stfucture-SoilType UsDA so¡l Texture USDA So¡l Structure-Grade 1.101.101.000.60 1.00 i¡iiii}¡ÀéÉe Moderate Strong t6-25 @ Prismatic Blocky Granular l¿:ërË::; Sandy Loam Loam S¡lt Loam Pr¡smatic Blocky Granular Weak 0.90 0.900.800.50 0.8026-40 Massive Structureless Sandy Loam Loam Silt Loam 0.650.650.55 Weak Moderate Strong Prismatic Blocky Granular Prismatic Blocky Grãnular 0.55 0.5s0.45 41-60 6t-75 0.35 0.5s 0.30 I I I StructurelessMassive Sandy Clay Loam Clay Loam Silty Clay Loam Sandy Clay Loam Clay Loam silty Clãy Loam 0.15 0.150.15 0.15I2l+0.10 Weak Moderate Strong Soil Types 2-44 Plâty5 2A 2 3 3A I Treatment levels are defined in Table 6'3 lRr""r outside the dashed box require design by a professional eng¡neer 100 10Textural Triangle 'wm !dtåyF:t,ot'¡A 20 100 90 80 20 50 40 80 30 40 Soil Type 2 or 2A ffimd& 10 NRCS Soil profile classification range, Type 2A Sand 20 10 100 Soil Texture by Feel Place soil in palm of hand. Add water drop-wise and knead the soil into a smooth and plastic consistency, like moist putty. Place ball of soil between thumb and forefinger, gently pushing the soil between with the thumb, squeezing it upward into a ribbon. Form a ribbon of uniform thickness and width. Allow ribbon to emerge and extend over the forefingeç breaking from its own weight. B¿sed on USDA NR(5 Guide t0Texture by teel - S. J.]hien,19i9, modified. Th¡s varial¡0n (reated by 0 Hanison, M Brown, W Brown, R Laws. Forms a weak ribbon less than 1" before breaking Loam Soil Type 2 or 2A Sandy loam Silt loam È Add dry soilwater ls the soiltoo dry? Yes No the soiltoo wet? Yes NoApplicable for both TH-1 and TH-2 the soil remain in a ballwhen squeezed? No the soilform a ribbon? No it form? Does soil feel very gritty? Yes No Does soilfeelvery smooth? Yes No Neither gritty nor smooth? Yes Claylonm SollType3iiilJA fçnili;ärv'f*Éf,ñi' sfltl{l-¡y lorfii ' : i.-.,. Clrylo¡¡r Forms 1 -2', ribbon re ffi ffi ffi ffi Forms a ribbon 2"or longer before breaking 3 2 loam lf platy structure then soil type 5 0 Heprvorlh.Par¡,l¡k C*orechnics¡, Inc. 5020 County Road 154 Gle¡rroad Springs, Coloredo 81601 Phone: 97t.945-79tt Fex: 9f0.945.t154 hpgeo@hpgeolcch.com May 30, 2002 Rob Crawford 120I Fir Avenue Rifle, Colorado 81650 Job No. LV¿361 Subject;Subsoil Study for Fouudation Design, Proposed Crawford Residence, Pa¡cel 394, UkúFtang, Garfield County, Colorado. Dear Mr. Crawford: As requested, llepworth-Pawlak Geotechnical, Inc. performed a subsoil study for design of foundations at the subject site. The study was condueted h accordance with our agreement for geotechnical engineering services to you dated May 22,2002. The dat¿ obtained and our recornnrendations based o[ tbe proposed coostruction and subsurface conditions encouutered are presented in this report. Proposed Construction: The pro¡rosed residence will be a single story manufactured stn¡cture over a walkout basement level located on tbe site as sho\ryn on Fig. l. Ground floor will be slab+u-grade. Cut depths ¿ue expected to r¡ngÊ benveen about 3 ro I feet. Foundation loadings for this rype of construction are assunod to be relatively light and typ¡cal of tbe proposed type of construction. lf building conditions or foundâtion loadhgs are siguificautly different from those described above, we should be notiñed to re-evaluate the recornmendations presented in this report. SÍte Conditions: Thc site was vacant at the time of our field cxploration. The ground surface in the building area is reladvely flat with a gentle slope down to the nortb and about 2 to 3 feet of elevation difference. A dr?inâge borders the uorthern ponion of the property. Vegetation consists of grass and weeds. Sagebrush and cononwood tees are located along the northcrn drainage. Subsurface Conditious: The subsurface conditions at the site were evaluatcd by observing nro exploratory pits at the approximate locatious shown on Fig. l. The pits had been excavated prior to our arrival ou-site. The logs of the pits are presentd on Fig. 2. The subsoils encousteretl, below about I foot of topsoil, consist of medium stiff to stiff, sandy to very sandy clay and silt. Results of swell-consolidation testing perforured on rclatively undisrurbed samples of the silt and clay soils, presenred on Figs. 3 and 4, generally indicate lorv to moderate comprcssibility under conditions of loading and wetting. The sample Fom Pit I at 3 feet showed a minor collapse potential H Rob Crawford May 30,2002 Page2 (senlement under constant load) when wencd, No frec warer was observed in the pits at the time of excavation and the soils were slightly uroist to moist. Fouudation Recommendations; ConsÍdering the subsoil condidons encountered i¡ the exploratory piæ and the nature of the proposed consh¡ction, tve reco¡umend spread foodngs placed on the undisturbed natural soil designed for an allowable soil bearing pressure of 1,500 psf for suppon of the proposed resídence. The soils tend ro compress after wening under load aud there could be some post-construcdon foundation settlernent. The amount of senlement would depend on tbe depth and extent of subsurface wening and coukl be on the o¡der of I to 2 i¡ches. Footings should be a minimum width of l8 inches for continuous walls and,2 feer for columns. Loose and disturbed soils encountered at the fou¡datiou bearing level witbin the excavatiou should be removed and the footing bearing level extended down to the undisturbed natural soils. The exposed subgrade should be moistened and compacted prior to placing concrete. Exterior footings should be provided witb adequate cover above their bearing elevatioru for frost protectÍon. Placement of footings at leæt 36 i¡ches below tle exterior grade is typically used in tl¡is area. Conti¡uous foundation walls should be reinforced top and bonom to span local auomalies such as by assuming an unsuppgned length of at least 12 fcet. Fouudation walls acting ås reuining structures should be designed to resist a lateral earth pressure based on an equivalent fluid unit weight of at least 55 pcf for the on-site soil as backfill. Floor $labs: Tbe natural on-site soils, exclusive of topsoil, are suitable to suppon lightly loaded slab-on-grade constructiou. The clay and silt soils are compressible when wcttd. To reduce the effects of some differential rnovement, floor slabs should be separatd from all bearing walls and colurnns with expansion joinu which allow unresuained vertical movement. Floor slab controt joints should be used to reduce damage due to shrinkage cracking. The requirements for joint spacing and slab reinforcement should be established by the designer based on experience and the intended slab use. A milimum 4 inch layer of freedraining gravel should be ptaced beneath basement level slabs to faciliate drainage and for subgrade suppon. This mate¡ial should consist of mi¡us 2 i¡ch aggregate with less than 50% passing rhe No. 4 sieve and less tban 2% passing the No. 200 sieve. A.ll flúl materials for support of floor slabs should be compacted to at least gS% of maxÍ¡num standa¡d Proctor densiry at a moisn¡re contenr neår optirnum. Required Frll c¿n consist of the on-site soils devoid of vegetation and topsoil. Underdrain System: Although free water was not encoutrtered during our exploration, it has been our experience in the area that local perched groundwater can develop during drnes of heavy precipiution or seasonal runoff. Frozen ground during spring runoff caû cteate a perched condition. lvVe recommend below-grade construction, such H-P Giorecx Rob Crawford May 30,2002 Page 3 as retainiug walls and basement areas, be protected from wening and hydrostatic pressure buildup by an underdrain sysrem. The draÍns should consist of drainpþ placed in the bortom of tbe wall backñll surrounded above ùe i¡vert level with free-draining granular material. The drai¡ should be placed at each level of excavation and at least I foot below lowest adjacent frnish grade and sloped at a minimum 1% to a sui¡able gravity outlet. Free-draining granular material used in the underdrain system should contais less than 2% passing the No, 200 sicve, Iess than 50% passing the No. 4 sieve and bave a maximum size of 2 inches. The drain gravel backñtl should be at least t¡lz feet deep. An impervious membra¡e such as 20 mil PVC should bc placed beneath the drain gravel in a nougb shape and anached to the foundation wall with mastic to prevent wening of the bearing soils. Surface Drainage: The following drainage precautioru should be observed during coßtruction and maiståined at all dmes after the residence has been completed:l) Inundation of the foundatio¡ excavations and uuderslab areas should be avoided during construction.2) Exterior backfrll sbould be adjusted to near optimum moisn¡re and compacted to at lear¡t 95% of the maximum standa¡d Proctor density in pavement and slab areas and to at least 9O% of the maximum standffd Proctor densiry in landscape areas. Freedraining wall backfill should be capped with about 2 feet of the on-site, finer graded soils to reduce surface water infrltration.3) The ground surface surrounding the exterior of the building should be sloped to drain away from the fouodation in all directions. We recommend a minimum slope of 6 inches in the fust l0 feet in uupaved areas and a minimum slope of 3 inches in the frrst l0 feet in pavemÊnt and walhvay areas.4) Roof downspouts and drains should discharge well beyond the limia of all backfill. 5) Landscaping which requires regular heavy irrigation, such as sod, should be located at least 5 feet from the building. Limitatio¡s: This srudy has been conducted in accordancc with generally accepted leotechnical engioeering principles and practices in this area at this time. We rnake no wärranty either expressed or implied. The conclusions and recommendations submitted in this report are based upon the data obtained from the exploratory pits excavated at the locations i¡dicated on Fig. I and to the depths shown on Fig. 2, the proposed type of construçtion, and our experience in the area. Our fimlings include interpolation and extrapolation of the subsurface conditions identified at the exploramry pits aad variations in thc subsurface conditions may Dot become evident until excavation is performed. If conditions encouutered during construcdon appear different from those H.P GEoiËcH Rob Ctawforil May 30, 2002 Page 4 dcscribed in this report, we should be aotifîed ar oncç so re-evaluation of the recommendations may be rnade. This report has been prepared for tbe exclusive use by our client for design purposes. We are not respoûsible for techdcal interpretations by others of our informaì¡on. ns the project evolves, we should provide continued consultation and field services during coûstruction to review and monitor rhe implemenudotr of our recommendatiogs, and io verify that the recommendations have bcen appropriately inte¡preted. Significant design changes may require additional analysis or modificarions to the recomn¡endations presentd herein. lffe recommend on-sitc observation of excavations and founclation bearing strata and testing of structural ñll by a representative of the geotechnical eugineer. If you have any questions or if we may be of further assisrä.nce, please let us know. Sincerely, HEPWORTH - PA1VLAK G , INC. Jordy Z. Adamson Jr. Reviewed by: ft;r. Steven L. Pawlak, P.E. JZAlksw anechments 29707 H-P GÊo:¡cH APPROX¡MATE SCALE1' - 60' .ÍRACT 598 PROPOS€D RESIDENCE \\ I I lPrT2 l¡Jz 5 Jl¡¡o :r PITl T , I t I PROPERW EOUNDARIES 102 361 HEPWORTH - PAWLAK GEOTECHNICAL, INC.LOCATION OF EXPLORATORY PITS Fis. 1 PIT 1 PIT 2 0 rcrtA! 0O-l0Íl 5 ft-20.0gO-99 -ZOO-E¡! tÀE27 Pl-? ã rc-Ît.Î ItO-lO¡¡ -200r?0 10 10 I.EGEND: fOPSOlb Eondy eilt ond cloy, orgonfce, slightty moiÈt, brown. C[-AY AND.SILT (Cl--ML); eondy to ræry eondy, etrotifiad, rñcdium etilf to ¡ilff, moist, brom,low ploaticlty. þ 2' Dicmeter hond drlvcn llner aomplc. NOÌES: 1. Explorotory p¡ts usrc .xcovotcd prior to our stte visit on Moy 22, ZOg2, 2' Locotlons of axplorctory plts w€ra rnâosrtrod opproxímotely by poclng from leotures on thr rlte plon provldod. 3. Ecwtlone of cxPlorotory pfts wsre not meosurcd ond loge ol explorotory plts ore drown to dçth.Plt 1 ¡0 obout 2 to 3 fcct hlgher thon Plt 2. +. Ih!. Ëxp¡orotory plt locotlong should bc cmaidcr¿d occurotc only to ths dogrec lmplled by themctlrod uged. 5. the llnce between moteriols shown on thâ erglorotory pit logs reprasent the opproximotc boundorle¡battaen moterlol t¡çcs ond tronsltlonc moy be groduoi. 6. No fse wotcr roe €ncount¿rcd ln the pltr of thß tlme of obserwtlon. Fluctuotlons in wotsr laræl moyôccur slth timc. 7. Loborotory Testlng Resultsl ffi=tïoterContcnt(Z) DD - Dry Dcnstty ( pcf ) -200 - Fcrccnt p.oeaing No. 200 elevcLL=LiguidUmit(Z)- Pl - Plosticity tndex ( Z ) 0 ool¡- I E ô,oê øol! I E Àoo rc-Ð.30Ht¡ 102 361 HEPWORTH-PAWLAK GEOTECHNICAL, INC.LOGS OF EXPLORATORY PITS Fig. 2 0 }t1 2 J 4 0.1 r.o 10 APPUED PRESSURE - ksf 100 0 N Ëo g,oo o.Ê o() 2 3 10 APPUED PRESSURE - kof Moígturc Content - 18.5 Ory Dansity - 1O2 Scmple of: Sondy Silt ond Cloy From:PitlotSFcct percent Pct I ,Comprcsslonupon retting \) Moieture Cont¿nt - 23.3 Dry Density = 95 Somplc of: Sondy Silty Cloy From:Pit2otSFcot porccnt pcf N \ \ No movemenl uPon wettîng 0.1 1.0 100 HEPWORTH- PAWLAK GEOTECHNICAL, INC.102 561 SWELL CONSOLIDAT1ON TEST RESULTS Fig. J Moisturc Contcnt = 19.1 Dry Dcnsíty : 103 Somple of: Sondy Silty Cloy From: Pit 2 of 7 Feel percont Pcf No movcmont upon wctting \ \ I t lt o N 1c .gg'üo EL¿c b() 3 4 t0 APPUED PRESSURE - ksf 0.1 r.0 100 102 561 HEPWORTH-PAWLAK GEOTECHNICAL, INC.SWELL CONSOLÍDATION TEST RESULTS Fig. 4 HEPWORTH-PAWLAK GEOTECHNTCAL, rNcTABLE ISUMMARY OF LABORATORY TEST RESULTSJOß NO. l02'36Ìsor( o18€OnOCt TYFC_tsandy silt and claysandy silty claysandy silty claysandy silty clayI1,r¡COi¡f tNEOcoMPHfs!ilVÊsrntr¡ollttßsFtAIT€llcig L¡[¡llrs?t^5frcritocxl*l7UOU¡DUMtr{*t27scBctfifPÂSSlr|Of{o. 200srqvE8370GR^OAltOfisÂfiot3tG¡IÂVET¡*lf{AÍU8AtORYoft¡stfYlPcll1029995103ilATU¡IÀLi¡ü5runEcotttEt{ftat18.520.023.319.1s^MtrE rocÀÌrotto€Plfi¡f.rtI3557lìt12 rlrsPEcil0r Htt iloT BE ilnDE UlttES$ THIS GARII IS POSTEII OlI TIIE JOB 24 HOURS NOTTCE REQUIRED FOR TNSPECTIONS *' BUILDING PERMIT ÊIRFIETD GOUIITY, COLONADO Drtr Addrt¡s tfl¡ Srth¡¡lrr AGREEMENT {, Sid¿Slde Rclr Tbis Crld Mocr Bc Pmtd So It ir Phioþ Visiblc From Ttr Struct U¡til Flnd Inrpcoior. INSPECTION RECORI) Footiug z Found¡tion -r /l UndcrAruund Plunbing 7t¡z Inaul¡tiou f7 Rongh Plumbing t ? -/ )d4-Itr1crll -'7â-D?r Cbinncy& Vcnt t z,J><z*#-Eþctric Fir¡l(tv Sr¡rc t"ú,*t*itÁÌil#, GrsPiping l Z.yt¿*f#Fill,l 1-yn ?* Ebcfric Rogb (By strtc l¡¡Dccrorl¿r_ idW Scptic Final Frrning ffo lncludc Roof i¡ phcr r¡d Doon lrlitdlcdl. rnd rffi¡dow¡ Noter: ALL LISTED ITEMS MI¡ST BE INSPECTED A¡$D APPROVED TEFORE COVERING - IryHETHER INTER¡OR OR EXTEN,IOR, T'NDERGROTI¡ÍD OR AEOVE GROUIÍD.- THIS PERIIIIT IS NOT TRANS¡trR.ABLE Phone 3t{-5m3 t09 tth Strcct County Courthou¡c Gþnwood Springs, Color¡do. APPROVEDD(} Nor DEsrRoY rHrs cARr) *fiâaÐrt$¡4*W(g'-, I ' IF pLÁ,cED oursIDE - cbvnn wITH CLEAR pLAsrIc