Common use of Geotechnical Services Clause in Contracts

Geotechnical Services. Nova Engineering and Environmental LLC will complete the Geotechnical evaluation. This proposed scope of services is designed to evaluate for restroom building foundation support and to assess the site’s subsurface conditions as they pertain to the presence of organic materials, loose or otherwise unsuitable soils, and groundwater. A combination of Standard Penetration Test (SPT) boring data and continuously sampled auger boring data will be sufficient to characterize the site’s subsurface soil profile and evaluate the proposed structure footprints, pavement and stormwater facility areas. All drilling, sampling and testing on this project will be conducted in general accordance with ASTM procedures or other applicable standards and practices. The Geotechnical Analysis will be completed to address the following improvements: ▪ Public Restroom Building ▪ Shade Structures ▪ Parking Expansion ▪ Stormwater Facilities C.1. The following will be performed to evaluate the following subsurface conditions present: ▪ Two (2) 20-foot deep SPT borings within the proposed restroom building footprint ▪ Two (2) 20-foot deep SPT borings within the proposed shade structure footprints ▪ One (1) 15-foot-deep auger boring and one (1) 35-foot SPT boring within each of the proposed stormwater facilities (total of six (6) borings) ▪ Four (4) 5-foot-deep auger borings within the proposed parking expansion areas C.2. The test boring locations will be approximated in the field by taping and pacing from site features and landmarks utilizing the provided site plan. The SPT borings will be drilled using a truck or ATV- mounted drill and hollow stem auger and/or rotary wash drilling procedures, as deemed necessary by site/subsurface conditions. Soil samples will be collected at selected depth intervals via the Standard Penetration Test method (ASTM D-1586). Upon completion of the borings, the depth to groundwater will be measured. Soil cuttings from the drilling process will be used for backfilling of the boreholes. C.3. Laboratory Testing – Laboratory testing will include visual classification of the soil samples collected during the drilling process in accordance with the Unified Soil Classification System (USCS) and ASTM standards. Laboratory testing will also include limited classification tests (up to 12 fines content tests and 12 natural moisture content determinations, and 6 permeability tests) of representative soils. In accordance with the attached General Terms and Conditions, soil samples will be disposed of 30 days after submittal of the final report, unless requested otherwise by the client.

Geotechnical Services. Nova Engineering DMY will provide geotechnical services and Environmental LLC prepare plans. DMY will perform soil borings for pavements and structures, including boring logs, test-cores, laboratory tests, analyses and recommendations for appropriate action. DMY may need to provide additional geotechnical testing for stormwater management (SWM) facilities. Borings and infiltration tests are required for each Best Management Practice (BMP) per the spacing and quantity required in the SWGB Appendix P. This additional geotechnical testing for SWM facilities is not included in this Phase 1 scope of work. Geotechnical investigations will include drilling for various structures and preparation of a final report with appropriate foundation recommendations. DMY will submit proposals and Geotechnical Reports to the Materials Engineer for comments. DMY will submit requests for drilling and geotechnical studies during the preliminary engineering phase together with site plan sheets and cross-sections as needed. DMY will complete drilling, lab testing, and report preparation within the Geotechnical evaluationappropriate time period. This proposed scope As a part of services is designed the geotechnical services, DMY will: • DMY proposes to evaluate for restroom building foundation support and to assess the site’s subsurface conditions as they pertain drill a total of twelve SPT borings. Borings will be drilled to the presence depth of organic materials10 feet each or auger refusal, loose or otherwise unsuitable soils, and groundwaterwhichever occurs first. A combination of Standard Penetration Test (SPT) boring data and continuously sampled auger boring data • DMY will be sufficient to characterize the site’s subsurface soil profile and evaluate the proposed structure footprints, pavement and stormwater facility areas. All drilling, sampling and testing on this project will be conducted in general accordance with ASTM procedures or other applicable standards and practices. The Geotechnical Analysis will be completed to address the following improvements: ▪ Public Restroom Building ▪ Shade Structures ▪ Parking Expansion ▪ Stormwater Facilities C.1. The following will be performed perform site reconnaissance to evaluate the following subsurface conditions present: ▪ Two (2) 20existing site condition and work with the RK&K to develop the boring location plans. • DMY will select and stake out the borings in the field using existing site features. Boring elevations will be estimated from the provided topographic information or as-foot deep SPT borings within the proposed restroom building footprint ▪ Two (2) 20-foot deep SPT borings within the proposed shade structure footprints ▪ One (1) 15-foot-deep auger boring and one (1) 35-foot SPT boring within each of the proposed stormwater facilities (total of six (6) borings) ▪ Four (4) 5-foot-deep auger borings within the proposed parking expansion areas C.2. The test drilled boring locations will be approximated in surveyed by the field by taping FPDC team and pacing from site features and landmarks utilizing provided to DMY. • DMY will contact Miss Utility to clear public utilities. DMY also assumes two days of private underground utility locating services for the provided site planboring locations. The SPT • DMY will obtain a DDOT Public Space permit for the fieldwork. DMY assumes borings will be drilled using located within DDOT ROW/Public Space. DMY understands that a truck or ATV- mounted drill and hollow stem auger and/or rotary wash drilling procedures, as deemed necessary by site/subsurface conditions. Soil samples DDOT IPMD Project ID will be collected at selected depth intervals via the Standard Penetration Test method (ASTM D-1586)assigned to this project. Upon completion of the borings, the depth to groundwater A DDOT public space permit and MOT plan approval will be measuredobtained through TOPS. Soil DMY assumes no other permits are required to access the site and perform the field work. All permitting fees and bonds will be waived for this DDOT IPMD project. • If MOT is required, DMY will engage a vendor to provide maintenance of traffic (MOT) including lane closure and flagging for the fieldwork. DMY assumes the DDOT MOT standards can be used without modifications. MOT plans are excluded from DMY’s scope of work. • DMY will perform SPT at 2-ft intervals for the top 10-ft. Boreholes will be backfilled with auger cuttings upon drilling completion. Pavement surface will be patched with concrete mix. Excess auger cuttings will be placed in steel drums and removed from site. DMY assumes the drilling process will be used for backfilling of the boreholes. C.3. Laboratory Testing – Laboratory testing will include visual classification of the soil samples collected during the drilling process in accordance with the Unified Soil Classification System (USCS) spoils and ASTM standards. Laboratory testing will also include limited classification tests (up to 12 fines content tests groundwater are not contaminated and 12 natural moisture content determinations, and 6 permeability tests) of representative soils. In accordance with the attached General Terms and Conditions, soil samples will can be disposed of 30 days after submittal as non-hazardous materials. Environmental screening lab tests are not needed and are excluded from DMY’s scope of work. Considering the final boring depth is not greater than 10- ft, DMY assumes no DOEE or DCRA permit is required. DMY assumes field work will be performed during restricted business hours between 9:30 AM and 3:30 PM. No night or weekend work is required. • DMY will collect a total of five bulk soil samples for compaction and California Bearing Ratio (CBR) tests. • DMY will perform laboratory testing including USCS/AASHTO soil classification, compaction, and CBR tests. • DMY will perform preliminary pavement design and evaluation. DMY will prepare and submit the Preliminary Geotechnical Engineering Report (PGER). DMY will provide the geotechnical field work, calculations, lab analysis and a geotechnical report, unless requested otherwise . RK&K will review the work provided by the clientDMY and provide comments for revision.

Geotechnical Services. Nova Engineering The geotechnical investigation performed for the referenced project will consist of field and Environmental LLC laboratory investigations, engineering analysis, and a report prepared by a Licensed Professional Engineer. The field investigation will complete consist of drilling two (2) bridge borings. One bridge boring will be drilled on each end of the Geotechnical evaluationproposed bridge. This The field investigation will also consist of drilling two (2) embankment borings to depths of 40 feet and drilling sixteen (20) pavement borings to depths of 15 feet below the existing ground surface. The bridge borings will be drilled until 20 feet of unweathered rock is penetrated. Unweathered rock is anticipated to be encountered at average depths of 40 feet below the existing ground surface. Therefore, it is anticipated that the test borings will be drilled to depths of 60 feet below the existing ground surface. If unweathered rock is encountered at average depths of greater than 40 feet, additional drilling footage will be required in order to penetrate 20 feet into unweathered rock. Sixteen (16) of the pavement borings will be drilled at a spacing of 1000 feet along the proposed scope roadway alignment. Subsurface soil samples will be secured with thin walled tube and/or split spoon samples depending on soil type and consistency. Rock encountered within the bridge borings will be continuously rock cored and will also be evaluated using the Texas Department of services is designed to evaluate Transportation Penetrometer (TxDOT Cone). In addition, TxDOT cone testing will be performed on 5-foot intervals for restroom building foundation support the overburden soils for the bridge borings. All samples will be properly logged, packaged, sealed, and to assess the site’s subsurface conditions as they pertain placed in a core box for transportation to the presence of organic materials, loose or otherwise unsuitable soils, and groundwaterlaboratory. A combination of Standard Penetration Test (SPT) boring data and continuously sampled auger boring data The test borings will be sufficient backfilled with soil cuttings and the pavement will be patched upon completion. The ENGINEER will assist the county in obtaining the right-of-entry to characterize the site’s subsurface all of the properties and assumes that the boring locations will be accessible to our conventional truck mounted drilling equipment during normal working hours. Should unusual soil profile conditions be encountered, we will provide the COUNTY with a recommendation and evaluate cost estimate to explore these conditions. The ENGINEER will contact Dig Tess to have them locate underground utilities. However, the proposed structure footprints, pavement and stormwater facility areasENGINEER is not responsible for damage to underground utilities that are not identified prior to drilling. All drilling, sampling and testing on this project Laboratory tests will be conducted in general accordance with ASTM procedures or other applicable standards to classify the soil and practicesto evaluate the volume change potential and strength of the soil and rock present at the site. The Geotechnical Analysis will be completed to address the following improvements: ▪ Public Restroom Building ▪ Shade Structures ▪ Parking Expansion ▪ Stormwater Facilities C.1. The following Per TxDOT standards, Atterberg limits, sieve analysis and moisture contents will be performed to evaluate the following subsurface conditions present: ▪ Two (2) 20-foot deep SPT borings within the proposed restroom building footprint ▪ Two (2) 20-foot deep SPT borings within the proposed shade structure footprints ▪ One (1) 15-foot-deep auger boring and one (1) 35-foot SPT boring on every stratum within each of the proposed stormwater facilities (total of six (6) pavement borings) ▪ Four (4) 5-foot-deep auger borings within the proposed parking expansion areas C.2. The test boring locations volume change potential of the soils will also be approximated in the field evaluated by taping and pacing from site features and landmarks utilizing the provided site planswell tests. The SPT borings will be drilled using a truck or ATV- mounted drill and hollow stem auger and/or rotary wash drilling procedures, as deemed necessary by site/subsurface conditions. Soil samples will be collected at selected depth intervals via the Standard Penetration Test method (ASTM D-1586). Upon completion of the borings, the depth to groundwater will be measured. Soil cuttings from the drilling process will be used for backfilling of the boreholes. C.3. Laboratory Testing – Laboratory testing will include visual classification strength of the soil samples collected during the drilling process in accordance with the Unified Soil Classification System (USCS) will be estimated using hand penetrometer tests and ASTM standardsunconfined compressive strength tests. Laboratory Unconfined compressive strength testing will also include limited classification tests (up to 12 fines content tests and 12 natural moisture content determinations, and 6 permeability tests) of representative soilsbe performed on the rock cores. In accordance with the attached General Terms and Conditions, soil samples Sulfate testing will be disposed of 30 days after submittal performed at 0 to 2 feet and 2 to 4 feet per TxDOT standards. Lime / PI series tests will also be performed on selected clay samples. CU triaxial testing and one-dimensional consolidation testing may be performed for the slope stability and settlement analyses of the final proposed embankments. Results of field and laboratory work will be presented in an engineering report, unless requested otherwise by . The report will include our recommendations to guide design and construction of the clientnew roadway and will include the following: 1. Generalized soils stratigraphy and groundwater levels. Results of classification and TCP testing with WinCore format boring logs. 2. Site Condition.

Geotechnical Services. Nova Engineering and Environmental LLC The Sub-Consultant will complete geotechnical exploration along the Geotechnical evaluationproject corridor. This proposed scope of These services is designed to evaluate for restroom building foundation support and to assess the site’s subsurface conditions as they pertain to the presence of organic materials, loose or otherwise unsuitable soils, and groundwater. A combination of Standard Penetration Test (SPT) boring data and continuously sampled auger boring data will be sufficient to characterize the site’s subsurface soil profile and evaluate the proposed structure footprints, pavement and stormwater facility areas. All drilling, sampling and testing on this project will be conducted in general accordance with ASTM procedures or other applicable standards the standard specifications for subsurface investigations and practicesdesign. This task includes the necessary field and office services to provide a geotechnical report for the project. The Geotechnical Analysis will be completed to address task involves completing the following improvementstwelve (12) borings to a depth of 10-15 feet below existing grade: ▪ Public Restroom Building ▪ Shade Structures ▪ Parking Expansion ▪ Stormwater Facilities C.1• Roadway borings (250-ft intervals alternating EB/WB lanes) = 8 borings • Roadway boring (NW Ash Drive) = 1 boring • Roadway boring (XX Xxxxxx Street) = 1 boring • Roadway borings (NW/SW School Street) = 2 borings The purposes of the borings include determination of existing pavement sections, roadway/utility design, moisture contents, groundwater levels (for 4 of above borings), pavement depths (cores), laboratory testing, and engineering analysis. The following borings will include all City/State required traffic control measures including coordination, permits, and arranging a utility locate through Iowa One Call. The backfilling of the boreholes will be performed to evaluate following the borings and meet City/State requirements. This subsurface exploration will include laboratory testing, engineering analysis, pavement design, and a written report. The results of our field and laboratory programs will be evaluated by a professional geotechnical engineer licensed in the State of Iowa. Based on the results of our evaluation, an engineering report will be prepared and include the following subsurface conditions presentinformation: ▪ Two (2) 20-foot deep SPT borings within the proposed restroom building footprint ▪ Two (2) 20-foot deep SPT borings within the proposed shade structure footprints ▪ One (1) 15-foot-deep auger boring and one (1) 35-foot SPT boring within each • Description of the proposed stormwater facilities (total of six (6) borings) ▪ Four (4) 5-foot-deep auger borings within project. • Computer generated boring logs with soil stratification based on visual soil classification • Summarized laboratory data on the proposed parking expansion areas C.2. The test boring locations will be approximated in the field by taping logs • Groundwater levels observed during and pacing from site features and landmarks utilizing the provided site plan. The SPT borings will be drilled using a truck or ATV- mounted drill and hollow stem auger and/or rotary wash drilling procedures, as deemed necessary by site/subsurface conditions. Soil samples will be collected at selected depth intervals via the Standard Penetration Test method (ASTM D-1586). Upon shortly after completion of drilling • Boring location diagram • Subsurface exploration procedures • Subsurface soil conditions In addition, geotechnical recommendations for the boringsproject will include: • Bearing soils for culverts • Settlement and global slope stability review (as defined above) • Earthwork construction • Expansive soil design considerations, if applicable • Cut and fill construction • Excavation and backfill • Site preparation, including the depth to groundwater will be measured. Soil cuttings from the drilling process will be used for backfilling suitability of the boreholes. C.3. Laboratory Testing – Laboratory testing will include visual classification of the soil samples collected during the drilling process in accordance with the Unified Soil Classification System (USCS) and ASTM standards. Laboratory testing will also include limited classification tests (up to 12 fines content tests and 12 natural moisture content determinations, and 6 permeability tests) of representative soils. In accordance with the attached General Terms and Conditions, soil samples will be disposed of 30 days after submittal of the final report, unless requested otherwise by the client.existing on-site soils for use as structural fill • Subsurface drainage recommendations • Subgrade preparation recommendations for grade supported pavements