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Home My WebLink About20101545.tiff • PRELIMINARY GEOTECHNICAL REPORT HEARTLAND RENEWABLE ENERGY WELD COUNTY, COLORADO SOILOGIC #09-1003 February 11,2009 • • 2010-1545 SOLOGIC • February 11, 2009 AGPROfessionals,LLC 4350 Highway 66 Longmont, Colorado 80504 Attn: Ms. Olivia Cain Re: Preliminary Subsurface Exploration Heartland Renewable Energy Weld County, Colorado Soilogic Project#09-1003 AgPro Project# 1818-02 Ms. Cain: Soilogic, Inc. (Soilogic) personnel have completed the preliminary geotechnical subsurface exploration for the Heartland Renewable Energy project to be constructed in • the West IA of the Southeast %4 of Section 25, Township 4 North, Range 65 west of the 6th Principal Meridian in Weld County, Colorado. The results of our preliminary exploration are included with this report. The subsurface materials encountered in the completed test borings consisted of a thin layer of topsoil and vegetation underlain by a layered system of light brown to brown silty sand and sandy lean clay. The silty sand and sandy lean clay were generally medium dense to dense and medium stiff to stiff respectively and showed low swell potential at current moisture and density conditions. Occasional zones of loose sand were encountered in the completed site borings. The silty sand/lean clay extended to the bottom of borings B-1, B-2, B-4, B-5 and B-6 at a depth of approximately 25 feet below present site grades. At boring location B-3, the silty sand/sandy lean clay extended to a depth of approximately 191 feet below ground surface and was underlain by weathered brown/grey/rust claystone with interbedded sandstone bedrock. The claystone extended to the bottom of boring B-3 at a depth of approximately 25 feet below present site grades. Groundwater was not encountered in any of the completed site borings at the time of drilling. • Soilogic, Inc. 1435 Hilltop Circle•Windsor, CO 80550• (970) 674-3430 PO Box 770310 •Steamboat Springs. CO • 80477 • (970)276-2087 I leartland Renewable Energy • Weld County,Colorado Soilogic 0 09-1003 2 Based on the subsurface conditions encountered, results of laboratory testing and type of construction proposed,we expect the proposed lightly loaded digester basins and material processing buildings could be constructed with conventional footing foundations and floor slabs bearing on site silty sand or sandy lean clay with low swell potential. Depending on site cuts, care may be needed in the southeast portion of the site to maintain adequate separation distances between claystone bedrock and any overlying improvements. Zones of loose sand were encountered with depth in several of the completed site borings such that care will be needed to insure building footing foundations and digester basins will be supported on soils with suitable strength. The near surface silty sand and sandy lean clay soils also appear suitable for direct support of site pavements. Other preliminary opinions and recommendations concerning design criteria and construction details for the proposed site improvements are included with this report. We appreciate the opportunity to be of service to you on this project. If we can be of further service to you in any way or if you have any questions concerning the enclosed • information,please do not hesitate to contact us. Very Truly Yours, Soilogic, Inc „C0 REG/ ,.•' 0 • \I ON 6-•. e • -�S.'ONAI.' G\ Wolf von Carlowit ,P.E. Principal Engineer • • PRELIMINARY GEOTECHNICAL EXPLORATION REPORT HEARTLAND RENEWABLE ENERGY WELD COUNTY,COLORADO SOILOGIC#09-1003 February 11,2009 INTRODUCTION This report contains the results of the preliminary geotechnical subsurface exploration completed for the Heartland Renewable Energy project to be constructed in Weld County, Colorado. The purpose of our investigation was to describe the subsurface conditions encountered in the completed site borings and develop preliminary recommendations concerning design and construction of digester basin and process building foundations and support of floor slabs and site pavements. Recommendations concerning the installation of site utilities and pavement section design estimates are also included. The conclusions and recommendations outlined in this report are based on results of the completed field and laboratory testing and our experience with subsurface conditions in this area. • PROPOSED CONSTRUCTION The project site includes approximately 80 acres to be developed as a renewable energy operation. Digester basins are expected to consist of lightly loaded concrete structures bearing at a depth of approximately eight (8) feet below ground surface. Process buildings are expected to be lightly loaded single story structures constructed as slab on grade. Foundations loads for the structures are expected to be light to moderate with continuous wall loads less than 3.5 kips per lineal foot and individual column loads less than 150 kips. Infrastructure improvements for the development will include utility installation and interior drive and parking area construction. Maximum cuts and fills on the order of approximately 10 feet are anticipated to develop finish site grades. SITE DESCRIPTION The development site includes the W%z of the SE% of Section 25, T4N, R65W of the 6th PM in Weld County, Colorado. At the time of our site exploration, the site was vegetated and generally sloping to the northwest with the maximum difference in ground surface • I Ieartland Renewable Energy • Weld County,Colorado Soilogic#09-1003 2 elevation across the site estimated to be approximately 20 feet. Several oil/gas wells were observed on the site at the time of our subsurface exploration. SITE EXPLORATION Field Exploration To develop preliminary subsurface information across the parcel, a total of six (6) soil borings were extended to a depth of approximately 25 feet below present site grades. The boring locations were established in the field by Soilogic personnel by pacing and estimating angles and distances from identifiable site references. The boring locations should be considered accurate only to the degree implied by the methods used to make the field measurements. A diagram indicating the approximate boring locations is included with this report. A graphic log of each of the auger borings is also included. The test holes were advanced using 4-inch diameter continuous flight auger powered by a • truck-mounted CME-55 drill rig. Samples of the subsurface materials were obtained at regular intervals using California and split-barrel sampling procedures in general accordance with ASTM specification D-1586. As part of the D-1586 sampling procedure, standard sampling barrels are driven into the substrata using a 140 pound hammer falling a distance of 30 inches. The number of blows required to advance the samplers a distance of 12 inches is recorded and helpful in estimating the consistency, relative density or hardness of the soils or bedrock encountered. In the California barrel sampling procedure, lesser disturbed samples are obtained in removable brass liners. Samples of the subsurface materials obtained in the field were sealed and returned to the laboratory for further evaluation, classification and testing. Laboratory Testing The samples collected were tested in the laboratory to measure natural moisture content and visually classified in accordance with the Unified Soil Classification System(USCS). The USCS group symbols arc indicated on the attached boring logs. An outline of the USCS classification system is included with this report. Classification of bedrock was • Heartland Renewable Energy • Weld County,Colorado Soilogic#09-1003 3 completed through visual and tactual observation of disturbed samples. Other bedrock types could be revealed through petrographic analysis. As part of the laboratory testing, a calibrated hand penetrometer (CHP) was used to estimate the unconfined compressive strength of essentially cohesive specimcns. The CHP also provides a more reliable estimate of soil consistency than tactual observation alone. Dry density, Atterberg limits, -200 wash and swell/consolidation tests were completed on selected samples to help establish specific soil characteristics. Atterberg limits tests arc used to determine soil plasticity. The percent passing the #200 size sieve (-200 wash)test is used to determine the percentage of fine grained soils (clay and silt)in a sample. Swell/consolidation tests arc performed to evaluate soil volume change potential with variation in moisture content. Results of the completed laboratory tests are outlined on the attached boring logs and swell/consolidation test summaries. SUBSURFACE CONDITIONS • The subsurface materials encountered in the completed site borings can be summarized as follows. Approximately 3 to 6 inches of topsoil and vegetation was encountered at the surface at the boring locations. The topsoil/vegetation was underlain by light brown to brown silty sand and sandy lean clay. The silty sand and sandy lean clay overburden soils were generally medium dense to dense and medium stiff to stiff respectively. Occasional zones of loose sand were encountered in the completed site borings. The silty sand and sandy lean clay showed low swell potential at in situ moisture and density conditions and extended to the bottom of borings B-1, B-2, B-4, B-5 and B-6 at a depth of approximately 25 feet below present site grades. At boring location B-3, the silty sand/sandy lean clay extended to a depth of approximately 191 feet below ground surface and was underlain by highly weathered brown/grey/rust claystone bedrock. The claystone was moderately hard and extended to the bottom of boring B-3 at a depth of approximately 25 feet. The stratigraphy indicated on the included boring logs represents the approximate location of changes in soil and rock types. Actual changes may be more gradual than those indicated. • Heartland Renewable Energy • Weld County,Colorado Soilogic S 09-1003 4 At the time of drilling, groundwater was not encountered in any of the completed site borings. Groundwater levels will vary seasonally and over time based on weather conditions, site development, irrigation practices and other hydrologic conditions. Perched groundwater conditions may also be encountered at times throughout the year. Perched water is commonly encountered in soils overlying less permeable soil layers and/or bedrock. The location and amount of perched water can also vary over time. ANALYSIS AND RECOMMENDATIONS Site Development All existing topsoil and vegetation should be completely removed from building, pavement and borrow/fill areas of the site. After stripping and completing all cuts and prior to placement of any overlying fill or site improvements, we recommend the exposed subgradc soils be scarified to a depth of 9 inches, adjusted in moisture content and compacted to at least 95% of the materials standard Proctor maximum dry density. The • moisture content of the reconditioned subgrade soils should be adjusted to be within the range of+2%of standard Proctor optimum moisture content at the time of compaction. Fill soils required to develop structural areas of the site should consist of approved low volume change soils free from organic matter, debris and other objectionable materials. Based on results of the completed laboratory testing, it is our opinion the site silty sand and sandy lean clay could be used as fill to develop the site. If it is necessary to import fill material to the site, those materials should have low potential for volume change and be relatively impervious. Fill soils should be approved prior to use. We recommend suitable fill materials be placed in loose lifts not to exceed 9 inches thick, adjusted in moisture content and compacted as recommended for the scarified materials above. Care should be taken to avoid disturbing reconditioned subgrade and placed fill soils prior to placement of any overlying improvements. Soils which are disturbed by the construction activities or allowed to dry out or become wet and softened should be reworked in place or removed and replaced prior to concrete placement and/or paving. • Heartland Renewable Energy Weld County,Colorado Soilogic#09-1003 5 Footing Foundations Based on the materials encountered in the completed site borings and results of laboratory testing, we expect a majority of the facility digester basins and process buildings footing foundations could be supported directly on natural undisturbed silty sand, sandy lean clay or suitable fill soils placed and compacted as outlined above. The foundations for the individual structures should bear on like materials. Occasional loose sand zones were encountered in a portion of the completed site borings. In addition, relatively dry lean clay soils were encountered at boring location B-6 completed in the northwest corner of the project site. If more extensive areas of loose sand or dry clay with moderate swell potential are encountered at proposed basin and building foundation bearing level, some overexcavation/backfill procedures may become warranted. Higher plasticity claystone bedrock was encountered at a depth of approximately 19'/2 • feet below ground surface at boring location B-3 completed in the southwest corner of the project site. Typically, we recommend a minimum separation distance of four(4) feet be established between claystone bedrock and any overlying improvements. Based on site grading, if the minimum recommended separation distance outlined above cannot be maintained, careful evaluation of the claystone bedrock should be completed. For design of footing foundations bearing on the natural undisturbed silty sand, sandy lean clay or properly placed and compacted fill, maximum net allowable soil bearing pressures in the range of 1000 to 2500 psf appear usable. Floor Slabs Based on results of the completed laboratory testing, we expect lightly loaded digester basins and building floor slabs could be supported directly on reconditioned silty sand, sandy lean clay with low swell potential or properly placed and compacted fill. Care should be taken to avoid disturbing digester basin and floor slab subgrade soils prior to concrete placement. Subgrade soils expected to receive basin or floor slab concrete • heartland Renewable Energy • Weld County,Colorado Soilogic#09-1003 6 should be evaluated closely prior to concrete placement. If areas of disturbed, wet and softened, or dry subgrade soils develop during construction, those materials should be removed and replaced or reworked in place prior to placement of the overlying improvements. Utility Installation No unusual problems are anticipated for extending utility excavations through the silty sand and lean clay overburden soils. Reasonable slopes developed in accordance with OSHA criteria in the natural overburden soils would be expected to remain stable for short periods of time during construction. Bedding around utility pipelines should be placed in accordance with recommendations from the pipeline designer. Backfill placed above utilities should consist of approved low-volume change soils free from organic matter, debris and other objectionable • materials. Based on results of the completed laboratory testing, it is our opinion the site silty sand and sandy lean clay could be used as utility backfill. Claystone bedrock was encountered at a depth of approximately 191/2 feet below ground surface at boring location B-3. If claystone bedrock is encountered at the time of utility excavation, we recommend those materials be kept separate from the silty sand and lean lay backfill soils and be placed as deep as possible in the utility trenches during backfilling. As a precaution, claystone bedrock should not he used as backfill within four(4) feet of finish pavement or other improvement subgrade level. Backfill soils should be placed in loose lifts not to exceed 9 inches thick, adjusted in moisture content and compacted to at least 95% the materials standard Proctor maximum dry density. The moisture content of the backfill materials should be adjusted to be within the range of±2% of standard Proctor optimum moisture content at the time of compaction. Site Pavements Pavement subgrades should be developed as outlined in the 'Site Development' portion of this report. We expect site pavements could be supported directly on the reconditioned silty sand and lean clay subgrade soils developed as outlined in that section. • Heartland Renewable Energy • Weld County,Colorado Soilogic#09-1003 7 Pavement section design is based principally on subgrade support and traffic loading. At this time the exact quantity and type of truck traffic is not known. The lean clay subgrade soils would be subject to low remolded shear strength such that it is our opinion a resistance value(R-value) of 5 could be used for design. For preliminary estimates, "light duty" pavements will likely include a minimum of 4 inches of hot bituminous pavement overlying 6 inches of aggregate base. Heavy duty pavements will likely include 5 to 6 inches of hot bituminous pavement overlying 8 to 12 inches of aggregate base depending on the quantity and type of truck traffic anticipated. Portland cement concrete pavements (PCCP) could be considered for areas of the site subjected to truck turning movements and/or concentrated and repetitive loading such truck parking and loading areas. PCCP thickness in the range of approximately 6 to 7 inches could be used for estimates. Drainage • Positive drainage is imperative for long term performance of the proposed site structures and associated improvements. We recommend positive drainage be developed away from all site structures and pavement areas to reduce the potential for wetting of the subgrade and bearing materials. Water which is allowed to pond adjacent to site improvements can result in unsatisfactory performance of those improvements over time. Water which is allowed to pond adjacent to site pavements can result in a loss of subgrade support and premature failure of the pavement sections. LIMITATIONS This report was prepared based upon the data obtained from the completed site exploration, laboratory testing, engineering analysis and any other information discussed. The completed borings provide an indication of subsurface conditions at the boring locations only. Variations in subsurface conditions can occur in relatively short distanced away from the borings. This report does not reflect any variations which may occur across the site or away from the borings. If variations in the subsurface conditions • Heartland Renewable Energy • Weld County,Colorado Soilogic#09-1003 8 anticipated become evident, the geotechnical engineer should be notified immediately so that further evaluation and supplemental recommendations can be provided. The scope of services for this project does not include either specifically or by implication any biological or environmental assessment of the site or identification or prevention of pollutants or hazardous materials or conditions. Other studies should be completed if concerns over the potential of such contamination or pollution exist. The geotechnical engineer should be retained to review the plans and specifications so that comments can be made regarding the interpretation and implementation of our geotechnical recommendations in the design and specifications. The geotechnical engineer should also be retained to provide testing and observation services during construction to help determine that the design requirements are fulfilled. This report has been prepared for the exclusive use of our client for specific application to the project discussed and has been prepared in accordance with the generally accepted • standard of care for the profession. No warranties express or implied, are made. The conclusions and recommendations contained in this report should not be considered valid in the event that any changes in the nature, design or location of the project as outlined in this report are planned, unless those changes are reviewed and the conclusions of this report modi fled and verified in writing by the geotechnical engineer. • O • ! -D 7o O BERM m m n co c D m u i i (.O I N ES t.DIGESTEJ LDIGTEt 1 DIGESTER I I. DIGESTER s O O - o . L DIGESTER ] L DIGESTER 1 ( DIGESTER I I DIGESTER I c'' r DIGESTER [ DIGESTER] [DIGESTER I [. DIGESTER j 2 D { DIGESTER ] I DIGESTER 1 r DIGESTER [ DIGESTER 1 [ DIGESTER J DIGESTER ] I DIGESTER j [ DIGESTER ] ? vs co I- n — — O i n o [ DIGESTER I DIGESTER I DIGESTER j [ DIGESTER 1 F 2- c, - ; CO 3j [DIGESTER , [DIGESTER-_] D ( DIGESTER I [-DIGESTER j E- z (T N __ O rr DIGESTER ( ( DIGESTER .1 33 rDIGESTER I r-b-IGE§T-E-R-1 n > N DIGESTER o ] DIGESTER i ] DIGESTER IGESTER II [DIGESTER _ Oz 0 m I DIGESTS- R 1 I DIGESTER J F [ DIGESTER ( [ DIGESTER• ( a mD z • r_ 0 i i 0 o x MATERIAL _ MATERIAL > PROCESSING • O I PROCESSING O N 4 N Ul `R 0O \ o z n n O( 5i n S HEARTLAND RENEWABLE ENERGY WELD COUNTY,COLORADO LOG OF BORING B-1 Project# 09-1003 SO`LOG1C February 2009 Sheet 1/1 Drilling Rig: CME 55 1 Waler Depth Information Start Date 2/3/2009 Auger Type: 4"CFA During Drilling None Finish Date 2/3/2009 Hammer Type: Manual After Drilling Surface Elev. - Field Personnel: WvC 24 Hours After Drilling %Passing co "N" MC DD q„ %Swell Swell Atterber Limits #200 Sieve SOIL DESCRIPTION Dap1h a � 9 (n) ti (%) (pcf) (pst) 500 psf Pressure LL PI 1%) 0.6'TOPSOIL AND VEGETATION 1 2 SM SILTY SAND 3 light brown to brown loose to medium dense 4 S CS 10 87 113.5 1000 None <500 pcf NL NP 18.2% 6 7 8 9 10 SS 5 4.1 N/A 1 12 13 14 Increasing Clay Content with Depth - 15 SS 28 7.8 4000 16 17 18 19 20 SS 24 8.7 4000 21 22 23 24 CL I SANDY LEAN CLAY-It brn,med stiff 1 25 SS 27 15.7 4000 BOTTOM OF BORING 25.5' • HEARTLAND RENEWABLE ENERGY WELD COUNTY,COLORADO _ LOG OF BORING B-2 Project# 09-1003 SON LOGIC February 2009 Sheet 1/1 Drilling Rig: CME 55 Water Depth Information Start Date 2/3/2009 Auger Type: 4"CFA During Drilling None Finish Date 2/3/2009 Hammer Type: Manual After Drilling Surface Elev. - Field Personnel: WvC 24 Hours After Drilling a %Passing SOIL DESCRIPTION Depth a "N" MC DO q„ %Swell @ Swell Atterberg Limits #200 Sieve s on H I%) {pct► OW) 500 psf Pressure LL PI (%) 0.6"TOPSOIL AND VEGETATION 1 2 SM SILTY SAND 3 brown loose to med.um dense 4 Calcareous 5 SS 4 7.9 nla 6 7 8 9 CL SANDY LEAN CLAY • light brown 10 CS 46 11.6 111.2 9000+ 0.2% 800 pst 32 16 52.9% nleditsn Stiff to stiff - 1t 12 13 14 15 SS 38 15.1 9000* 16 SM SILTY SAND light brown 17 medium dense 10 dense - 18 19 20 SS 38 9.0 90004 21 22 23 24 BOTTOM OF BORING 25.5' 25 SS 30 13.0 , 4000 • S HEARTLAND RENEWABLE ENERGY WELD COUNTY,COLORADO LOG OF BORING B-3 Project# 09-1003 SO LOGIC February 2009 Sheet 1/1 Drilling Rig: CME 55 Water Depth Information Start Date 2/3/2009 Auger Type: 4"CFA During Drilling None Finish Date 2/3/2009 Hammer Type: Manual After Drilling Surface Elev. - Field Personnel: WvC 24 Hours After Drilling y a %Passing SOIL DESCRIPTION Depth "N" MC DD q„ %Swell @ Swell _Atterberg Limits_ #200 Sieve f Itt) ; (%) (pcfl (psi 500 psf Pressure LL PP (%) 0-6*TOPSOIL AND VEGETATION - 1 2 SM SILTY SAND 3 light brown loose to medium dense 4 5 CS 5 7.3 nla 28.3% 6 7 8 410 - 9 10 SS 11 10.2 9000n II 12 CL SANDY LEAN CLAY brown 13 medium stiff - t4 15 SS 40 12.3 9000* 16 17 18 19 20 SS 37 20.6 9000* 21 CLAYSTONE - brown I grey/rust 22 moderately hard - 23 With Interbedded Sandstone 24 BOTTOM OF BORING 25.5' 25 SS 50/5 16.5 4000 • • HEARTLAND RENEWABLE ENERGY WELD COUNTY,COLORADO LOG OF BORING B-4 Project# 09-1003 SD 1 LOGIC February 2009 Sheet 1/1 Drilling Rig: CME 55 1 Water Depth Information Start Date 2/3/2009 Auger Type: 4"CFA 'During Drilling None Finish Date 2/3/2009 Hammer Type: Manual After Drilling Surface Elev. - Field Personnel: WvC .24 Hours After Drilling %Passing v SOIL DESCRIPTION Depth s "N" MC DD q" %Swell @ Swell Atterberg Limits #200 Sieve s (It) ,a, 1%) (pd) (pen 500 psf Pressure LL PI (14 0-6"TOPSOIL AND VEGETATION 1 2 SM SILTY SAND 3 brown loose to medium dense 4 5 SS 8 6.9 nfa Calcareous 6 7 • 10 SS 22 5.0 5000 11 12 13 14 15 CS 49 1.8 123.5 3000 0.4% 1500 per 24 11 30.4% 16 17 18 19 20 55 30 6.2 2000 21 22 23 24 CL SANDY LEAN CLAY-It b.med stiff 25 SS 36 11.0 9000+ BOTTOM OF BORING 255' • • HEARTLAND RENEWABLE ENERGY WELD COUNTY,COLORADO LOG OF BORING B-5 Project# 09-1003 SOILOGIC February 2009 Sheet 1/1 Drilling Rig: CME 55 Water Depth Information Start Date 2/3/2009 Auger Type: 4"CFA During Drilling None Finish Date 2/3/2009 Hammer Type: Manual After Drilling Surface Elev. Field Personnel: WvC 24 Hours After Drilling rc Y.Passing rn SOIL DESCRIPTION Depth 4 "N" MC DD q„ /e Swell @ Swell Atterberg Limits #200 Sieve In1 ,au (141 (pct) (pal) 500 psf Pressure LL PI (%I 0.6'TOPSOIL AND VEGETATION 2 SM SILTY SAND 3 brown loose to medium dense 4 S SS 9 8.3 n/a 6 7 a • 9 10 SS 7 3.9 n!a 11 12 13 14 15 55 20 11.3 nla 16 17 16 19 20 SS 18 20.9 5000 CL SANDY LEAN CLAY 21 light brown/rust medium stiff 22 23 24 SM SILTY SAND 25 CS 26 13.7 n/a • • HEARTLAND RENEWABLE ENERGY WELD COUNTY,COLORADO LOG OF BORING B-6 Project# 09-1003 SO-JLOGIC February 2009 Sheet 1/1 Drilling Rig: CME 55 Water Depth Information Start Date 2/3/2009 Auger Type: 4"CFA During Drilling None Finish Date 2/3/2009 Hammer Type: Manual After Drilling Surface Elev. - Field Personnel: WvC 24 Hours After Drilling %Passing"co SOIL DESCRIPTION Depth "N" MC DD q„ %Swell @ Swell Atterberg Limits #200 Sieve j (%) (pc!) (psi) 500 psi Pressure IL PI (%) 0-6-TOPSOIL AND VEGETATION 2 CL SANDY LEAN CLAY 3 brown mottled tan and rust medium still to stilt 4 5 SS 21 9.5 9000. 6 7 • 9 10 CS 34 13.5 119.3 9000. 0.4% 900 psf 31 16 65.2% 11 12 13 14 15 SS 23 13.6 9000+ 53.1% 16 17 18 19 20 SS 23 9.2 9000 21 22 23 24 BOTTOM OF BORING 2b.5' 25 SS 28 18.9 9000+ • HEARTLAND RENEWABLE ENERGY . WELD COUNTY, COLORADO Project# 09-1003 February 2009 SWELLJCONSOLIDATION TEST SUMMARY 12 10 - --'_- - - l a �i m 6 — il - ,I 3 ICI I ti I II I Ii q F. I I 2 I I i • o I e X 10 100 1000 10000 100000 Applied Load(psf) Sample ID: B-1,S-1 @ 4' Sample Description: Brown Silty Sand Initial Moisture 5.9% Liquid Limit NL Final Moisture 15.7% Plasticity Index NP Swell @ 500 psf None %Passing#200 16.2%° Swell Pressure <500 psf I Dry Density 113.5 pcf 4 41111 SO,LOGIC HEARTLAND RENEWABLE ENERGY • WELD COUNTY, COLORADO Project# 09-1003 February 2009 SWELL/CONSOLIDATION TEST SUMMARY 12 • 10 -- - i . i 8 m 8 y 2 i L - p e' -q _- - - 1 -_--c III I . 0 8 o i , 0 U I k -8 I , 12 I L _ J 11 10 100 loan 10000 100000 Applied Load(psf) Sample ID: B-2,S-2 @ 9' Sample Description: Light Brown Sandy Lean Clay Initial Moisture 9.8% Liquid Limit 32 Final Moisture 12.1% ' Plasticity Index 16 %Swell @ 500 psf 0.2% % Passing#200 52.9% Swell Pressure 800 psf Dry Density 111.2 pcf • SO],LOGIC HEARTLAND RENEWABLE ENERGY • WELD COUNTY, COLORADO Project# 09-1003 February 2009 SWELL/CONSOLIDATION TEST SUMMARY 12 —� I i i io ----- 1 , o I 4 1 I II I -2 r`J1.dn• ",1-1 -- • _l_ I -a t _iL • s i Tr; { x -s to -- I -12 i 1 I 10 100 1000 10000 100000 Applied Load(psf) Sample ID: B-4, S-3 @ 14' Sample Description: Light Brown Clayey Sand Initial Moisture 5.9% Liquid Limit 24 Final Moisture 11.8% Plasticity Index 11 %Swell @ 500 psf 0.4% % Passing#200 30.4% Swell Pressure 1500 psf I Dry Density 123.5 pcf • SO; LOGIC HEARTLAND RENEWABLE ENERGY • WELD COUNTY, COLORADO Project# 09-1003 February 2009 SWELL/CONSOLIDATION TEST SUMMARY 10 H ' TI -- I44 L a II I -4 0 0 • ,._. v... $ i , I , .. , L g at 10 100 1000 10000 100000 Applied Load(psf) Sample ID: B-6,S-2 @ 9' Sample Description: Light Brown to Brown Sandy Lean Clay Initial Moisture 13.1% Liquid Limit 31 Final Moisture 15.3% Plasticity Index 16 % Swell @ 500 psf 0.4% %Passing#200 65.2% Swell Pressure 900 psf Dry Density 119.3 pcf s • Sc LOGIC 0 UNIFIED SOIL CLASSIFICATION SYSTEM (USCS) Coarse-Grained Grovels more than Clean 0,0.els Loll OW Well-graded gravel' Solis mOre than 50% of coarse Ivan 5% fn es Cuis and <Cc Si. 50%reloined on fraeton rttoined GP Poorly-graded ode0()Curet' No 200 sieve on Na • siert Cu<d and/er f>Cc)3' y-q` Gravels omit! Fines rine, cbss'fy as I.1L Si' 1114 GM Silty grovel, CH more Ikon 12% tines fines classify os CL or CM GC Clayey Gravel" Sands 307. or Crean Sands Less C,>J and t<CcS3' sw Well-graded fond. more coarse than 5% foes Iroclion nooses Cu<G and/ar 1)fr)J` SP Poorly-graved sand', No • sieve - Sands .ill, /noes Fines closIily os ML Or Mir SM Silly send"" — mare IhOn 12% final lines classify 0s CI. or C1r SC Clayey sand`'' fine-Coined Sifts and Cloys i.Or genic 01>1 and pla'f on or obo.0 .A-Line' Cl. Leon clay•`' Soils 507.of Liquid Limit less mote passes the Than SO 01<4 or plop below 'A-Line• Ml 52t''" 7 No. 200 sieve `---- Or anic Clay..., e0 75 0L organic Liquid Lima - Oven dried - q Uglitll Lipid - not deed Organic sal"•' --••—• inorganic PI plats en or 00ove -A-Line CH Fal cloy'' Silts and Clays , { Liglud Lnfil 30 Or 11 more PI plots below -Aline MN Eleslic Sill"' organs l.ould Llm.t - oven dried Or cloy"" <0.75 OH Comic]Limit - not dried Organic fig"`• rHighly organic fens Peimardy argan,C moller. dock in<orar. and organic odor PT Peot l•• 1-+a OS- ',I sW trlan.l5 le 2184.No.VA old `Used a•loo e.aenr ssn•p 'Cu-ON/0,Cc. 'eon lone•or-.e+.rover,.•ici.+r b •U.1 e o p,•dmninrL �r Rae b4ela• 51010r 41001 c.4 be. O edn0.r° 1'al orlon.)se fora Ne.ZOO M No'•iG WY<•••edNH..r earn' ered4r0 sits send.00d'.e.dr le P•°° ' Veil ati•IL nl w1 Crlaln•)1)i send. .�4..�N .e.d'1• none. 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Sle-SM..••Pef.f 0000 •ill.•+i CC-01..505C 0rad,0 •ere.000.1401 n°Y r-s.fo'r't 9re•ee SP-SC rerr Y•°ae.rd•d•c•r •w if •elf al-033 .Jr I O r ' 1 , n Iralwy.l'U'-.• •x .a ernnh.n[•.••.r.el-Nun. d _ V o G I g.c i — - —alQ_. nnHM0f� I 4 G\ • tt u1 I I i --.•_L... fa •o.o --114----o'.1----4--..---4-,-----4, o 11D -»--�J V+a oho I BL!l Fine Grained Soils Coarse Grained Soils Bedrock L Qufpsfl Consistency Blows/ft Relative Density eiowt/ft Weathering •1500 Very Soft 0.4 Very Loose 0-SO Weathered BOO-1000 Soft 5.8 LOOK 50• Competent 1001.2000 Medium Stiff 9.12 Slightly Dense Degree of Weathering 2001.4000 Stiff 13.30 Medium Dense Slight. Slight decomposition,possible color change 4001.6000 Very Stiff 31-SO Dense Moderate: Some decomposition old cb100 charge throughout 8001.16000 Very Hard 50. Very Dense High' Rock highly decomposed.may be extremely broken ill _USDA United States A product of the National Custom Soil Resource Department of Cooperative Soil Survey, Agriculture a joint effort of the United Report for • States Department of RCS Agriculture and other VVeId County ,Felgees, State agencies including the C 0 l o ra d o Natural Agricultural Experiment 7 Resources Stations, and local Conservation participants Southern Part Service Heartland Renewable Energy iriktem- • A _ k . I • • v •- •. , -• 4 2., 0 893ft 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://soils.usda.gov/sqi/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center(http://offices.sc.egov.usda.gov/locator/app? agency=nres)or your NRCS State Soil Scientist(http://soils.usda.gov/contact/ state_off ces/). 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. Information about soils is updated periodically. Updated information is available through the NRCS Soil Data Mart Web site or the NRCS Web Soil Survey. The Soil Data Mart is the data storage site for the 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, parental status, 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 alternative means 2 • for communication of program information(Braille, large print, audiotape,etc.)should contact USDA's TARGET Center at(202)720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800)795-3272 (voice) or(202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. • • 3 • Contents Preface 2 How Soil Surveys Are Made 5 Soil Map 7 Soil Map 8 Legend 9 Map Unit Legend 10 Map Unit Descriptions 10 Weld County, Colorado, Southern Part 12 69—Valent sand, 0 to 3 percent slopes 12 70—Valent sand, 3 to 9 percent slopes 12 72—Vona loamy sand, 0 to 3 percent slopes 13 Soil Information for All Uses 15 Soil Properties and Qualities 15 Soil Qualities and Features 15 Hydrologic Soil Group (Heartland Renewable) 15 Water Features 19 • Depth to Water Table (Heartland Renewable) 19 Soil Reports 24 Soil Physical Properties 24 Engineering Properties (Heartland Renewable) 24 References 27 • 4 • How Soil Surveys Are Made / Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area.They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles.A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity. Currently,soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA. • The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform,a soil scientist develops a concept,or model,of how they were formed.Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape. Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries. Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units). Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile.After the soil • scientists classified and named the soils in the survey area, they compared the 5 Custom Soil Resource Report • individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research. The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas. Soil scientists make many field observations in the process of producing a soil map. The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil- landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded. These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape. • Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties. While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests.Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management. Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil. Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date. After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and identified each as a specific map unit.Aerial photographs show trees,buildings,fields, • roads, and rivers, all of which help in locating boundaries accurately. 6 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. • • 7 • Custom So ource Report • a, Soi Map r, 4 O 532400 532600 532800 533000 533200 533400 533600 533800 534000 534200 40' 1T T � � 40° 1 ' o c in v S S cn tti H 03 S :a...-3 ...=its .kil s r • l R$ W ! 1 .a... -. ; ,-' Is; _ 4 • co th� 40° 16' 23" E "I40° 16' 23" 532400 532600 532800 533000 533200 533400 533600 533800 534000 534200 v in Map Scale. 1 9,530 if prnted on A size (8 5" x 11 n ") sheet v Mc M v N Meters O 0 100 200 400 600 A Feet 0 500 1,000 2,000 3.000 Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest(Aol) al Very Stony Spot Map Scale: 1:9,530 if printed on A size(8.5"x 11")sheet. Li Area of Interest(AOI) r Wet Spot The soil surveys that comprise your AOI were mapped at 1:24,000. Soils Other Soil Map Units Please rely on the bar scale on each map sheet for accurate map Line Features p Special Point Features `"� Gully measurements. ?t Cl Blowout ''' Short Steep Slope Source of Map: Natural Resources Conservation Service ® Borrow Pit Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov nres.usda. ov r3S; Other P: Y' g • Clay Spot "'"'"`' Coordinate System: UTM Zone 13N NAD83 Political Features • Closed Depression Cities This product is generated from the USDA-NRCS certified data as of x Gravel Pit Water Features the version date(s)listed below. Gravelly Spot Oceans Soil Survey Area: Weld County,Colorado,Southern Part ® Landfill _. Streams and Canals Survey Area Data: Version 9,Feb 11,2008 A Lava Flow Transportation Rails Date(s)aerial images were photographed: 7/29/2005 al, Marsh or swamp x. Mine or Quarry rave Interstate Highways The orthophoto or other base map on which the soil lines were ,,,,.� US Routes compiled and digitized probably differs from the background p Miscellaneous Water imagery displayed on these maps.As a result,some minor shifting l`C, Major Roads of map unit boundaries may be evident. p Perennial Water s�.,a Local Roads y Rock Outcrop + Saline Spot Sandy Spot Severely Eroded Spot • Sinkhole • Slide or Slip Fr Sodic Spot E Spoil Area 0 Stony Spot Custom Soil Resource Report • Map Unit Legend Weld County,Colorado,Southern Part(CO6t8} Map Unit Symbol I Map Unit Name .' Acres in AOI Percent of AOI 69 Valent sand,0 to 3 percent slopes 0.0 0.0% 70 Valenl sand,3 to 9 percent slopes 205.6 63.2% 72 Vona loamy sand,0 to 3 percent 119.7 36.8% slopes Totals for Area of Interest 325.2 100.0% Map Unit Descriptions 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 properties 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 particular 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. If 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 all the 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. If 10 Custom Soil Resource Report • intensive use of small areas is planned, however, 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 soil series. 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 into 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 association 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. • 11 Custom Soil Resource Report Weld County, Colorado, Southern Part 69—Valent sand, 0 to 3 percent slopes Map Unit Setting Elevation:4,650 to 5,100 feet Mean annual precipitation: 13 to 19 inches Mean annual air temperature:48 to 52 degrees F Frost-free period: 130 to 180 days Map Unit Composition Valent and similar soils: 90 percent Description of Valent Setting Landform: Plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Eolian deposits Properties and qualities Slope:0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Capacity of the most limiting layer to transmit water(Ksat): High to very high (5.95 • to 19.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity:Very low(about 2.6 inches) Interpretive groups Land capability classification (irrigated):4e Land capability(nonirrigated):6e Ecological site: Deep Sand (R067BY015CO) Typical profile 0 to 8 inches: Fine sand 8 to 60 inches: Sand 70—Valent sand, 3 to 9 percent slopes Map Unit Setting Elevation:4,650 to 5,100 feet Mean annual precipitation: 13 to 19 inches Mean annual air temperature:48 to 52 degrees F Frost-free period: 130 to 180 days Map Unit Composition • Valent and similar soils: 95 percent 12 Custom Soil Resource Report • Minor components: 1 percent Description of Valent Setting Landform: Plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Eolian deposits Properties and qualities Slope: 3 to 9 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Capacity of the most limiting layer to transmit water(Ksat): High to very high (5.95 to 19.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity:Very low(about 2.6 inches) Interpretive groups Land capability classification (irrigated):4e Land capability(nonirrigated):6e Ecological site: Deep Sand (R067BY015CO) Typical profile 0 to 8 inches: Fine sand • 8 to 60 inches: Sand Minor Components Typic psammaquents Percent of map unit: 1 percent Landform: Swales 72—Vona loamy sand, 0 to 3 percent slopes Map Unit Setting Elevation:4,600 to 5,200 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature:48 to 55 degrees F Frost-free period: 130 to 160 days Map Unit Composition Vona and similar soils: 85 percent Minor components: 1 percent Description of Vona • Setting Landform: Terraces, plains 13 Custom Soil Resource Report • Down-slope shape: Linear Across-slope shape: Linear Parent material:Alluvium and/or eolian deposits Properties and qualities Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water(Ksat): High (1.98 to 6.00 in/hr) Depth to water table: More 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 4.0 mmhos/cm) Available water capacity: Moderate (about 6.5 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability(nonirrigated):4e Ecological site: Sandy Plains (R067BY024CO) Typical profile 0 to 6 inches: Loamy sand 6 to 28 inches: Fine sandy loam 28 to 60 inches: Sandy loam Minor Components • Aquic haplustolls Percent of map unit: 1 percent Landform: Swales • 14 • Soil Information for All Uses Soil Properties and Qualities The Soil Properties and Qualities section includes various soil properties and qualities displayed as thematic maps with a summary table for the soil map units in the selected area of interest.A single value or rating for each map unit is generated by aggregating the interpretive ratings of individual map unit components. This aggregation process is defined for each property or quality. Soil Qualities and Features Soil qualities are behavior and performance attributes that are not directly measured, • but are inferred from observations of dynamic conditions and from soil properties. Example soil qualities include natural drainage, and frost action. Soil features are attributes that are not directly part of the soil. Example soil features include slope and depth to restrictive layer.These features can greatly impact the use and management of the soil. Hydrologic Soil Group (Heartland Renewable) Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long- duration storms. The soils in the United States are assigned to four groups(A, B, C, and D) and three dual classes (ND, B/D, and C/D). The groups are defined as follows: 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. 15 Custom Soil Resource Report • 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. If a soil is assigned to a dual hydrologic group (ND, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. • • 16 Custom Sol .source Report Map--Hydrologic Soil Group (Heartland Renewable) F. iv ° 532400 532600 532800 533000 533200 533400 533600 533800 534000 534200 40° 17' 7" 40° 17' 6" • p v 0 0 S _ CS )y i;:.. U) c§ e V �p v i� o . I o0 0 co m { a)ii) un £ V i co co N Z b•' a•-1rr;1t'M'Ya •,.� » ",'t;D.Jur er'.G�Ykt61 0 CO CO in ;;' v , v v. 40° 16' 23" 532400 532600 532800 533000 533200 533400 533800 534000 534200 m Map Scale: 1:9,530 Hprinted on A size 8.5 x 11 sheet. v ( „� v rn M A Cr) . N Meters Q g 0 100 200 400 600 a Fee: 0 500 1,000 2,000 3,000 Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest(AO!) Map Scale: 1:9,530 if printed on A size(8.5">< 11")sheet. 1 Area of Interest(AOI) The soil surveys that comprise your AOI were mapped at 1:24,000. Soils Soil Map Units Please rely on the bar scale on each map sheet for accurate map Soil Ratings measurements. A ND Web of Map: Natural Resources Conservation Service Mi Web Soil Survey URL: http://websoilsurvey.nres.usda.gov B Coordinate System: UTM Zone 13N NAD83 B/D This product is generated from the USDA-NRCS certified data as of C the version date(s)listed below. C/D Soil Survey Area: Weld County,Colorado,Southern Part D Survey Area Data: Version 9, Feb 11,2008 Not rated or not available Date(s)aerial images were photographed: 7/29/2005 Political Features ® Cities The orthophoto or other base map on which the soil lines were Water Features compiled and digitized probably differs from the background Oceans imagery displayed on these maps.As a result,some minor shifting of map unit boundaries may be evident. y. . Streams and Canals Transportation Rails ti Interstate Highways US Routes trf Major Roads H Local Roads Custom Soil Resource Report • Table—Hydrologic Soil Group (Heartland Renewable) Hydrologic Soil Group—Summary by Map Unit—Weld County,Colorado,Southern Part Map unit symbol Map unit name Rating . Acres in A0l I, Percent of Aol 69 Valent sand,0 to 3 percent A 0.0 0.0% slopes 70 Valent sand,3 to 9 percent A 205.6 63.2% slopes 72 Vona loamy sand,0 to 3 8 119.7 36.8% percent slopes Totals for Area of Interest 325.2 100.0% Rating Options—Hydrologic Soil Group (Heartland Renewable) Aggregation Method: Dominant Condition Component Percent Cutoff.' None Specified Tie-break Rule: Lower Water Features • Water Features include ponding frequency, flooding frequency, and depth to water table. Depth to Water Table (Heartland Renewable) "Water table" refers to a saturated zone in the soil. It occurs during specified months. Estimates of the upper limit are based mainly on observations of the water table at selected sites and on evidence of a saturated zone, namely grayish colors (redoximorphic features) in the soil. A saturated zone that lasts for less than a month is not considered a water table. This attribute is actually recorded as three separate values in the database.A low value and a high value indicate the range of this attribute for the soil component. A "representative"value indicates the expected value of this attribute for the component. For this soil property, only the representative value is used. • 19 • Custom So ource Report all Map—Depth to Water Ta le (Heartland Renewable) , � in in in M r O 532400 532600 532800 533000 533 00 533400 533600 533800 534000 534200 40° 17' 7" _ $ 8 vii I m _ _ — — v I - 70 $ ! S 4 I I U, It v 7i I o) �n m I 8 co ii I li 70 1 Z 1 I I I 03 V' I I i I 1 • I N 40° 16' 23" I v 40° 16' 23" 532400 532600 532800 533000 533200 533400 533600 533800 534000 534200 F- Map Scale 1:9.530 if printed on A size (8.5"x 11") sheet. M in "' o N Meters A 0 100 200 400 600 g Feet 0 500 1,000 2,000 3,000 • • • Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest(AO!) Map Scale: 1:9,530 if printed on A size(8.5"x 11")sheet. 1 Area of Interest(AOI) The soil surveys that comprise your AOI were mapped at 1:24,000. Soils• Soil Map Units Please rely on the bar scale on each map sheet for accurate map Soil Ratings measurements. 0-25 25-so Source of Map: Natural Resources Conservation Service Web Soil Survey URL: http://websoilsurvey.nres.usda.gov n so-100 Coordinate System: UTM Zone 13N NAD83 El 100-150 This product is generated from the USDA-NRCS certified data as of 150-200 the version date(s)listed below. >200 Soil Survey Area: Weld County,Colorado,Southern Part Political Features Survey Area Data: Version 9, Feb 11,2008 ® Cities Water Features Date(s)aerial images were photographed: 7/29/2005 Oceans The orthophoto or other base map on which the soil lines were Streams and Canals compiled and digitized probably differs from the background Transportation imagery displayed on these maps.As a result,some minor shifting of map unit boundaries may be evident. .,..t Rails N Interstate Highways ,F,✓. US Routes taN't Major Roads N Local Roads Custom Soil Resource Report • Table—Depth to Water Table (Heartland Renewable) ': Depth to Water Table-Summary by Map Unit—Weld County,Colorado,Southern Part Map unit symbol Map unit name j fRating(centimeters) Acres inAO1' :'• Percent ofAOl :'.;. 69 Valent sand,0 to 3 >200 0.0 0.0% percent slopes 70 Valent sand,3 to 9 '>200 205.6 63.2% percent slopes 72 Vona loamy sand,0 to l>200 119.7 36.8% 3 percent slopes Totals for Area of Interest 325.2 100.0% • • 22 Custom Soil Resource Report • Rating Options—Depth to Water Table (Heartland Renewable) Units of Measure: centimeters Aggregation Method: Dominant Component Component Percent Cutoff: None Specified Tie-break Rule: Lower Interpret Nulls as Zero: No Beginning Month: January Ending Month: December • • 23 Custom Soil Resource Report • 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. Engineering Properties (Heartland Renewable) • This table gives the engineering classifications and the range of engineering properties for the layers of each soil in the survey area. 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. If the content of particles coarser than sand is 15 percent or more, an appropriate modifier is added, for example, "gravelly." 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 classifies soils according to those properties that affect roadway construction and maintenance. In 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. 24 Custom Soil Resource Report • If 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. 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. Percentage (of soil particles)passing 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. Liquid limit and plasticity index(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. 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. • • 25 Custom Soil Resource Report "! ., , ':. Engineering Properties-Weld County,Colorado,Southern Part Map unitayntbot and soil .Depth USDA texture '. Classification Fragments i' Percentage passing sieve number— Liquid Plasticity':. '.name " limit index !Unified AASHTO >10 3-10 . 4 '10 - 40 , 200 inches ` inches In .. .. Pct Pct Pct 69—Valent sand,0 to 3 percent slopes Valent 0-8 Fine sand SM A-2 0 0 100 100 65-80 20-35 - NP 8-60 Sand SP, SP- A-3 0 0 100 95-100 60-70 0-10 - NP SM 70—Valent sand,3 to 9 percent slopes I Valent 0-8 Fine sand SM A-2 0 0 100 I 100 65-80 20-35 - I NP 8-60 Sand SP,SP- A-3 0 0 100 95-100 60-70 0-10 — I NP SM 72—Vona loamy sand,0 to 3 percent slopes Vona 0-6 Loamy sand SM A-2 0 0 100 100 50-75 15-30 — NP 6-28 Fine sandy loam,sandy SC,SC- A-2,A-4 0 0 100 90-100 60-90 30-45 20-30 NP-10 loam SM,SM 28-60 Sandy loam,loamy sand, SM,SC- A-4,A-2 0 I 0 100 90-100 50-85 15-40 20-25 NP-5 loamy fine sand SM 1 i 26 • 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. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt,G.W.,and L.M.Vasilas,editors.Version 6.0,2006. Field indicators of hydric soils in the United States. • National Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://soils.usda.gov/ Soil Survey Staff. 1999.Soil taxonomy:A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http://soils.usda.gov/ Soil Survey Staff. 2006. Keys to soil taxonomy. 10th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http://soils.usda.gov/ Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://soils.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.glti.nres.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://soils.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States,the • Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://soils.usda.gov/ 27 Custom Soil Resource Report • United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. • • 28 USDA United States AproductoftheNational Custom Soil Resource �� Department of Cooperative Soil Survey, • Agriculture ajointeffortoftheUnited Report for States Depa tment of O \JRCS Agriculture and other Wei... County Federal agencies, Statel agencies including the Colorado, Natural Agricultural Experiment Resources Stations, and local Conservation participants Southern Part Service Heartland Renewable Energy, LLC � } '�"9 4.e'bSs'1 gy{22y' 9-1.r7...,(;!:-.1:-.?,. CFF"Y p R-aoRnv'y T^r-R y x"�ST'�Fe'w" yY ,� 5 ]A £ 'r ,,,,''R ' 7 �, � .1 � ' :‘:`,1',`,"-t-‘ . x t tx_ .,, rl t. r a i q a k. �, 7 z# &xSt �� tt» � Ja M ){_f 4 P: s' ' 37�Y 5� ` i �F r '3ry 5 f, r e S° .1 �� ] �Jrl y< i i^y x F :-".‘r 1 4,4,4.-;• �,,,liff: ,11, t fi� 5 t ,r , t3 ¢y _ a l d fita n 6 { AJ i K 'k °Y}r r K 8 qJ�1 i 1i*% i''..1.21"-'4404): r,�w r - '] V et n$ a x g = d ' r ,tx "l tad ° j ; r ..�� (. 9 b 'C ,, y5��4 � � t:fiiyc3 ,. t n., ..("1.,".,....,..'::,...,—, N f its^, kA d ,,,51,:,.,:::,,,, 9 a h F:1:". t^a � ..F 0 v : 1 j 1 as _ v F • j0��726ft ..._ . _.._. . . 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://soils.usda.gov/sqi/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center(http://offices.sc.egov.usda.gov/locator/app? agency=nrcs) or your NRCS State Soil Scientist(http://soils.usda.gov/contact/ state_offices/). 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. Information about soils is updated periodically. Updated information is available through the NRCS Soil Data Mart Web site or the NRCS Web Soil Survey. The Soil Data Mart is the data storage site for the 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, parental status, 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 alternative means • 2 • for communication of program information(Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at(202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800)795-3272 (voice) or(202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. • • 3 Contents Preface 2 Soil Map 5 Soil Map 6 Legend 7 Map Unit Legend 8 Map Unit Descriptions 8 Weld County, Colorado, Southern Part 10 70—Valent sand, 3 to 9 percent slopes 10 72—Vona loamy sand, 0 to 3 percent slopes 11 References 13 • • 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 Custom Soil Resource Report Soil Map ZO zo Fp el • • Q v 0 o • 53!400 _ 533C00 531100 531200 533300 533400 533500 40' 1T l" 1 1 1 40' 1T 1'•r r,r , .�ibT,' p• Y. -. !'.'it'.. _. '- a ... I - •� i!::n - I P _ - r „ {f • ao des' — _ yy y Y< r to J\.- G7•_ -_ALP` >t F I 7 ?'rr _ L rr—. I - i - • _ l a•- ;. lax,. e =i.' , ? r}. i.. , tiY. t l • •'ir1 7,' IF]i it a k§- S ' t.. -. • t L 4 "C-a-rrsc • r. rty fY ]I,i J T �• `,L' ._i •-•-.i� -�9 , t . ( 1 ") d .� 7 J 4a-,- .1p_}. r, m . Cyy y • J irs _ i'. " t 1' - s .. • a • — O � - - Sr y OD _ �w + :.L ) i_I..1#'• y • r ' P ..Y� f 1 . -Ti • ri fir. -. Y r i 71'ry u - t j i-_- . s.v.Cs( 3r� t. -- r' • r▪ ) • r I ny nit c .J' • ` (lam. 1 7 10 • i I Jd ? r r t o In I Li.` f r. a t�v j�j - • a y r • ri K"-ItA . y j i • - ~,� 'r F b . c tJ '3 1 • f�r 1 .:4:- I din •�!i Nin,c. - r. -µ•o .J,`,4•, t _-.:44- 1 uq a r.n...r�y t K . mfl + '� .�•� n ?. K t .?•-t�l . 7 , ... t•. _ ;, )-A • , •IA', ?` - �, L •.V alt ': ti ,j�y�� y T2• 7. . { t-7v sue• i .. L h _ ti•aI tiKV teats 4t. Kam: .ter T.i -. vr:-P rem .. - 1. . i �L _ - f{ •i :\. +{+ ; e...±,•1/4:,:art: .rl J t..)". t ' J1.)".1Lr ,f.,L"....,.�C r 2.91.147 N! I. k.r• _a i -' • i'� �+ . `;. u 14: a}.t:-;t, r->y ' r. .r'-� -, ° K] t n r1 ., (. ' a r_I Oa f Sq.,�� _ ,7'...14..• r� ��: 1' _ : •• . t.J'•.4•�..'lyy f�s rrt_ _,....:2-e-.2:-.„, , • I t r •Y!. .;..............-......7*...� i �r �y 4 4 !Syr•,'KL,44 �L- �I"s-� i'tK ej t Y�.41f, 2...sr: '. ) • ' . � d / t4-{ .• .---il"tYy-c�•L F'J,i il•�I ,•'v., >"-,Tr ,•,,.-.‘ I.; , O 40' t o 30" P 40' 16 30" 532900 533000 533100 533200 533300 533400 533500 is to e Map Scale: 1:4,520 tprinted on A size (8.5"x 11") sheet r • Meters • o N 0 40 80 160 240 $ A Feettr- 0 150 300 600 900 i • • Custom Soil Resource Report MAP LEGEND MAP INFORMATION Area of Interest(AO') al Very Stony Spot Map Scale:1:4,520 if printed on A size(8.5"• 11")sheet. Area of Interest(AO') Y Wet Spot The soil surveys that comprise your AOI were mapped at 1:24,000. Soils a Other Soil Map Units Please rely on the bar scale on each map sheet for accurate map Line Features Special Point Features - Gully measurements. Blowout Short Steep Slope Source of Map: Natural Resources Conservation Service Egi Borrow Pit Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov nres.usda. ov Other P: Y 9 • Clay Spot -- Coordinate System: UTM Zone 13N NAD83 Political Features * Closed Depression Cities This product is generated from the USDA-NRCS certified data as of }: Gravel Pit Water Features the version date(s)listed below. ._ Gravelly Spot f'-'�'�,' Oceans Soil Survey Area: Weld County,Colorado,Southern Part Landfill . _ Streams and Canals Survey Area Data: Version 9,Feb 11,2008 ,r4. Lava Flow Transportation Rails Date(s)aerial images were photographed: 7/29/2005 a Marsh or swamp r Mine or Quarry �' Interstate Highways The orthopholo or other base map on which the soil lines were Miscellaneous Water US Routes compiled and digitized probably differs from the background ri imagery displayed on these maps.As a result,some minor shifting Perennial Water _ Major Roads of map unit boundaries may be evident. ., Rock Outcrop v�� Local Roads y- Saline Spot Sandy Spot Severely Eroded Spot O Sinkhole b Slide or Slip Q Sodic Spot Spoil Area O Stony Spot Custom Soil Resource Report • Map Unit Legend Weld County,Colorado'Southern Part(CO918) x , Map Unit Symbol; I . :' Map Unit Name ., I Acres In AOl ; I ;' Percent of AOl ` 70 Valent sand.3 to 9 percent slopes 42.5 45.7% 72 Vona loamy sand,0 to 3 percent 50.6 54.3% slopes Totals for Area of Interest 93.2 100.0% Map Unit Descriptions 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 properties 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 particular 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. If 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 all the 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. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. 8 Custom Soil Resource Report • 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 soil series. 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 into 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 association 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. • 9 Custom Soil Resource Report • Weld County, Colorado, Southern Part 70—Valent sand, 3 to 9 percent slopes Map Unit Setting Elevation:4,650 to 5,100 feet Mean annual precipitation: 13 to 19 inches Mean annual air temperature:48 to 52 degrees F Frost-free period: 130 to 180 days Map Unit Composition Valent and similar soils: 95 percent Minor components: 1 percent Description of Valent Setting Landform: Plains Down-slope shape: Linear Across-slope shape: Linear Parent material: Eolian deposits Properties and qualities Slope: 3 to 9 percent Depth to restrictive feature: More than 80 inches Drainage class: Excessively drained Capacity of the most limiting layer to transmit water(Ksat): High to very high (5.95 • to 19.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water capacity:Very low (about 2.6 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability(nonirrigated): 6e Ecological site: Deep Sand (R067BY015CO) Typical profile 0 to 8 inches: Fine sand 8 to 60 inches:Sand Minor Components Typic psammaquents Percent of map unit 1 percent Landform: Swales • 10 Custom Soil Resource Report • 72—Vona loamy sand, 0 to 3 percent slopes Map Unit Setting Elevation:4,600 to 5,200 feet Mean annual precipitation: 13 to 15 inches Mean annual air temperature:48 to 55 degrees F Frost-free period: 130 to 160 days Map Unit Composition Vona and similar soils: 85 percent Minor components: 1 percent Description of Vona Setting Landform:Terraces, plains Down-slope shape: Linear Across-slope shape: Linear Parent material:Alluvium and/or eolian deposits Properties and qualities • Slope: 0 to 3 percent Depth to restrictive feature: More than 80 inches Drainage class:Well drained Capacity of the most limiting layer to transmit water(Ksat):High (1.98 to 6.00 in/hr) Depth to water table: More 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 4.0 mmhos/cm) Available water capacity: Moderate (about 6.5 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability(non irrigated):4e Ecological site: Sandy Plains (R067BY024CO) Typical profile 0 to 6 inches: Loamy sand 6 to 28 inches: Fine sandy loam 28 to 60 inches: Sandy loam Minor Components Aquic haplustolls Percent of map unit: 1 percent Landform: Swales • 11 Custom Soil Resource Report • • • 12 • 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. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt,G.W.,and L.M.Vasilas,editors.Version 6.0,2006.Field indicators of hydric soils in the United States. National Research Council. 1995. Wetlands: Characteristics and boundaries. • Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U.S. Department of Agriculture Handbook 18. http://soils.usda.gov/ Soil Survey Staff. 1999. Soil taxonomy:A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http://soils.usda.gov/ Soil Survey Staff. 2006. Keys to soil taxonomy. 10th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http://soils.usda.gov/ Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. United States Department of Agriculture, Natural Resources Conservation Service. National forestry manual. http://soils.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. National range and pasture handbook. http://www.glti.nrcs.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. National soil survey handbook, title 430-VI. http://soils.usda.gov/ United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. • http://soils.usda.gov/ 13 Custom Soil Resource Report • United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. • • 14 L �\ \ '•i}� } NOTE: THIS IS A SUPPLEMENTAL DRAWING ' ' VA ' IN ORDER TO REFERENCE BORING LOCATIONS � '; ill ' ' ' i A" I I`I ,/ WITH THE UPDATED SITE LAYOUT " ,__/ Zei d4� ° :.\\' \ ` A, ' 3 _ / v. _ _ _ , I , , iI I / / ; • l / P tt to ,� \ 1 �„ , w / �' �' � u tom. �� , w ��I 3 /I i , l I "; .I I , I v , y ,mz I '.'d v' ,�� ki o _ \ I }I , ❑ . . tj cii■ , �, vI ' Iv . / II S• I ''be'l'41:` \ ' ' \ ( <:(:sry I:.... I.-:'___\1 r'-'2.JiirI2- Fcs__C_—2,1,,-r—s,_._ LRS 1 r 'l1 I_ I • / II I 1 I I iI I ■4$i 1" v„� P Iry ©E9 ,, 4 ,v,• ( Iflr _ I XOO ` ; / I v: [ IAic s, - H a � I Q �� '�__IJ , II I A /I I A , X l vv1 � _ � ; I % ' I � I. ° /IA I 7 y' moo- - I v 'i I s 7 I I yIcl IN I _ I V I•' ° ruiu N._JH • 1" I N „. 1V *- T : g I �' v �yv E . ' , - -, I S \ \ \k\ - \ �' s ' }•.� • ) ,L _ _ i -' � '/•i - � „ `J r J ••�\• / \ ` ' \ I 7 SCALE.I' JII/� — / Vq A -N1 Tws ae: ` s i / / 1/ 1 _.r . DATE: 05/20/21 HEARTLAND 3/9/21 Mil Ac><PRO ICSSiU[IA15, LLC SHEET NO. ��,,.F=a., =III II SUPPLEMENTAL BORING LOCATION DIAGRAM N OF Well Location Sketch: Compliance.Engineering.Remedlatlon LT Environmental, Inc. 4600 W. 60th Avenue • 4.....L...-7V Arvada, Colorado 80003 BORING LOG/MONITORING WELL COMPLETION DIAGRAM BorinerWcll Number: —Project O1t.7ot Heartland Compost Facility Date: Project Number: ti3 ii tc HRE0901 3 E6 J S174 M�P Logged By: ^ + Drilled By: "E' High Plains Drilling Elevation: Detector: Drilling Method: Sampling M``llso�d: 1 Na None SS ta.,�u'' Cft,.-�:....�►l /c ;� Ste.tti Gravel Pack: , Seal: , , I Grout: , CSSI 10x20 C3o -l► � Bentonite Chips(54.- 0, 8 L 6 c'f k� [co ) Casing Type: Diameter. ,, Length: t Hole Diameter: ,• Depth to Liquid: Sch 40 PVC 2 /0 G NP • S...a.,1 Type: Slot: Diameter. 2 If Length: La I Total Depth: ,y b+ Depth NAater: $ch 40"'VC 0.010 _ c ,- 6.. 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Project: WILoO1• Heartland Compost Facility Date: Project Number 9118105 HRE0901 Logged By: Drilled By: SEE SITE NA10 eta High Plains Drilling Elevation: Detector: Drilling Method: Sampling Method Arai• None fl.S. (1-J✓ Cwt•:-....aj set.4. Qt41 Gravel Pack: ! .\ SW. S. Grout: �y 11 <7O ! a` CSSI10x20 (S4- J Bentonite Chips J QsAAWoo /O—O f Casing Type Diameter. 2 Length: 3y/ Hole Diameter: 8'I Depth to Liquid: Sch 40 PVC ! tuft - Sacen Type: Slot: Diameter 11 Length: Total 4 Total Depth: r , Depth to Water: 0.010 1. Sch40 3VC yEP c ..00 Cu v c a mg o a o v Well . f° :2 E Dept = o Lithology/Remarks Completion 6a. a Z V n (ft.bgs.) ca c4 E~ Diagram 0 IT II ref wtr •,• . -raft.tl — Sw% n..i:...• Dt'tw... 4 feet1.I vctb•r! a 6 — • - y 8 _ _ • ic ..10... .— k..J CP,�; tt,. • ?%aA.'t — .r..: — IN0 - 1e.• tt.l�ttILI 4* Mat- tie - 1 b v 12 Rootli bt-btb — N NI S� — N .. it 18 N. 29. ._ 22 _ _'2 - 24 24 _ N. 26 - 2$ _ _ N. del, hb 30 " _, 3— _- 2 .- ___ 34 ". • 36 • —t • 38 40 4') -r t. LIHOLOGIC LOG Page / of 2 Well Location Sketch: Compliance•Engineering•Remediatlon LT Environmental, Inc.0 40 4600 W. 60th Avenue Arvada, Colorado 80003 BORING LOG/MONITORING WELL COMPLETION DIAGRAM 'Boring/Well Number. Protect: yrie.,ot. Heartland Compost Facility Date: Project Number �,y I SItealo4 HRE090t S F s.. I/'/�P Logged By: Ih lied By: �i CC High Plains Drilling Elevation: Detector: Drilling Method. a Sampling Method: NR None ri%$. A�Jv CA. 1.:....•.a i Srri) i,r....., Gravel Pack: / I , Bentonite Scat: 1-- Grout: C S S I 10x20 (5"i JChips (.Jo?—/6') Vef 44 '. ob!...0 Casing Type: Diameter: �,, Length: "I I Hole Diameter it al Depth to Liquid: Sch 40 PVC 71.i w4- Scrota Type: Slog Diameter. t, Length: r Total Depth: I Depth to Water: Ssh 40-)VC .otu Z to KYte o �? E ca a �' eu Well b c 3 a. Depth n u Lithology/Remarks Completion 4 U & (ft.bgs.) cn Diagram a v) poi);' wo ( 11. ...,4 ( ,tit. . -, 1o.. .06044 t: AN - 42 S tL Ilhi 44" • Seise.,. (!a»tl. br..a J 4? • 1 _ . L,,U.t5 _._ . ._t..• 44 .1 ' c.,ea,.41.4c-4J se- ti .t —;a Z . 46 ' ..v, ( • d ► O 48 —4 . . . 50- -- U st-•.•e 52 C-1--- -1 Hid T114.4:4-, a. -"•• Q 56 r ',,t;, _ .. �.,: 58 : . 60 . .__ ... -- .. 62 —`'. 64 — . 66 68 ®a'. • • _ . ..... - .... . .72 _. _r2� . 74. 74. — 40_ . . . .. .... . 78 76. 80 rt N..� 1 - L1THOLOGIC LOG Page_ I of Z Well Location Sketch: `,, Compliance.Engineering l Remedlatlon • M.wead /� T W.Environmental, Inc.e ` Ill 4600 60th Avenue R Arvada, Colorado 80003 N. BORING LOG/MONITORING WELL COMPLETION DIAGRAM Borine/Well Number: PmieCL w17i 0114.033 Heartland Compost Facility Date: Project Number: (o $/I4/pS HRE0901 I :..t Logged BY: Drilled By: Set SITE N/P cm.. High Plains Drilling Elevation: Detector: Drilling Method: Sampling Method: AA None SS A-ye &Hewu I siki von, Gravel Pack r Seal: Grout CSSI 10x20 (30 "8 ) Bentonite Chips (f-,C,I) po.i-la..4 aCo') Casing Type: Diameter. I. Length: 1 Hole Diameter et Depth to Liquid: Sch 40 PVC 2 1O b WA Screen Type: Sloe Diameter. L" Length: ZD I Total Depth: 2 O N Dep )Vater: O.� Sch 40-WC 7 /g M m2 � 3 •� = Deth ° a Well a c Lithology/Remarks Completion At au' U (ft.bgs.) rn a F Diagram 0 it 11 '"'1 -*.r $o.r _ dr, vie ._.2 $..a Cas .s:l4 . loo♦n - 1t)LA- {.'w.ea 1.re... . .-- . 4 peas( Se.S.o —a T 10. ..... � o c ~i>., 12 _ .14.. _ +,a 16 _ 18 e . - del ho _ SP u.. .u.A s4...120 zo _ . . . ._ exwaCG,l•a Qelb .�"'e - It a......%a .22. 2 • ._ . 26 _ —, 28 _<ti de.1 he 30 "' 32 _ 'TO :". X32: • 36..-= red • • . 38. ._ _.;5 40 LITH0L0GIC LOG Page I of_1_, Hydrologic Soil Group—Weld County, Colorado, Southern Part (Heartland Potential Run-On) ti- N N e ° III533400 533500 533600 533700 533800 533900 534000 534100 40° 1T5" 40° 17' 4" S 8 i IA 4 o S — 6i 1\ .�P, ♦4I t • f t t III ;\ 5 J I ' i. r - \• t f 0 . k‘• \k‘ - O y. '7? S. 1 r 'jyy '— f• = s. .- • •.. ttl _ - \1 .4.-i. . ', _ Ill - .` ' : 7 S .. _- ., C r- w Tr c c t - _ � _g t X11 • ' \ a_ t 1 co o . . o m ,> a 1 v c ,i ,j. , 0 .-.-.— O c ' O 1 p S M - ! 40' 15 27" 533600 5.;3700 533800 533900 534000 '100 iv • ' Map Scale 1:5,520 d punted on A size (8.5"x 11'') sheet i° Metersal :' N 0 50 100 200 300 g ,1 Feet A 0 200 400 800 1.200 USDA Natural Resources Web Soil Survey 2.1 3/17/2009 MIN Conservation Service National Cooperative Soil Survey Page 1 of 4 Hydrologic Soil Group—Weld County,Colorado,Southern Part (Heartland Potential Run-On) MAP LEGEND MAP INFORMATION Area of Interest(AOI) Map Scale: 1:5,520 if printed on A size(8.5"a 11")sheet. "-1 Area of Interest(AO') The soil surveys that comprise your AO1 were mapped at 1:24,000. Soils Please rely on the bar scale on each map sheet for accurate map ,_j Soil Map Units measurements. Soil Ratings Source of Map: Natural Resources Conservation Service A Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov ND Coordinate System: UTM Zone 13N NAD83 B This product is generated from the USDA-NRCS certified data as of the version date(s)listed below. B/D Soil Survey Area: Weld County.Colorado,Southern Part n C Survey Area Data: Version 9, Feb 11,2008 C/D Date(s)aerial images were photographed: 7/29/2005 D The orthophoto or other base map on which the soil lines were Not rated or not available compiled and digitized probably differs from the background imagery displayed on these maps.As a result,some minor shifting Political Features of map unit boundaries may be evident. ® Cities Water Features Oceans Streams and Canals Transportation Rails N Interstate Highways a.,.- US Routes Major Roads Local Roads USDA Natural Resources Web Soil Survey 2.1 3/17/2009 a Conservation Service National Cooperative Soil Survey Page 2 of 4 Hydrologic Soil Group-Weld County,Colorado,Southern Part Heartland Potential Run-On • Hydrologic Soil Group Hydrologic Soil Group—Summary by Map Unit Weld County,Colorado,Southern Part Map unit symbol Map unit name Rating ` Acres in AOI Percent of AOI 70 Valent sand,3 to 9 percent A 78.7 70.3% slopes 72 Vona loamy sand,0 to 3 B 33.3 29.7% percent slopes Totals for Area of Interest 111.9 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (ND, B/D, and C/D). The groups are defined as follows: 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. If a soil is assigned to a dual hydrologic group (ND, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition • USDA Natural Resources Web Soil Survey 2.1 3/17/2009 a Conservation Service National Cooperative Soil Survey Page 3 of 4 Hydrologic Soil Group-Weld County,Colorado,Southern Part Heartland Potential Run-On • Component Percent Cutoff.: None Specified Tie-break Rule: Lower • • USDA Natural Resources Web Soil Survey 2.1 3/17/2009 Conservation Service National Cooperative Soil Survey Page 4 of 4 Hello