Common use of Geotechnical Investigation Clause in Contracts

Geotechnical Investigation. The scope of services covered in this proposal consist of field exploration, laboratory testing and the preparation of a geotechnical engineering report for the proposed pavement, retaining walls, and bridge. 1. Field Exploration The field exploration will consist of obtaining borings for the proposed bridge, retaining walls, and existing US 90A pavement coring. The following field exploration program is proposed. Proposed bridge foundation and MSE retaining wall areas 2 (B-1 and B-4) 100 1. The planned boring locations are shown on the attached Anticipated Exploration Plan. 2. Below grade at the time of our field program. Proposed bridge foundation and MSE retaining wall areas 2 (CPT-2 and CPT-3) 30 1. The planned CPT locations are shown on the attached Anticipated Exploration Plan. 2. Below grade at the time of our field program. 3. The CPTs will be terminated at the proposed termination depth or to depth of refusal, whichever occurs first. Our exploration team will prepare field boring logs as part of standard drilling operations including sampling depths, penetration distances, and other relevant sampling information. Field logs include visual classifications of materials observed during drilling and our interpretation of subsurface conditions between samples. Final boring logs, prepared from field logs, represent the Geotechnical Engineer's interpretation, and include modifications based on observations and laboratory tests. CPT logs will be prepared by the Geotechnical Engineer 2. Laboratory Testing The project engineer will review field data and assign laboratory tests to understand the engineering properties of various soil strata. Procedural standards noted below are for reference to methodology in general. In some cases, variations to methods are applied because of local practice or professional judgment. Standards noted below include reference to other, related standards. Such references are not necessarily applicable to describe the specific test to be performed. Exact types and number of tests cannot be defined until completion of fieldwork, but we anticipate the following laboratory testing may be performed: • Tex-103-E Determining Moisture Content in Soil Materials • Tex-104-E Determining Liquid Limits of Soils • Tex-105-E Determining Plastic Limits of Soils • Tex-106-E Calculating Plasticity Index of Soils • Tex-110-E Particle Size Analysis of Soils • Tex-111-E Determining the Amount of Material in Soils Finer than the 75 micrometer (No. 200) Sieve • Tex-118-E Triaxial Compression Test for Undisturbed Soils • ASTM D2166 Unconfined Compressive Strength of Soil • ASTM D2435 One Dimensional Consolidation Properties of Soil Our laboratory testing program includes observation of soil samples by an engineer. Based on the results of our field and laboratory programs, we will describe and classify soil samples in accordance with the Unified Soil Classification System (USCS).

Geotechnical Investigation. The For the current Geotechnical scope of services covered in this proposal consist of work, we propose a field exploration, laboratory testing and the preparation of a geotechnical engineering report for the proposed pavement, retaining walls, and bridge. 1. Field Exploration The field exploration investigation that will consist of obtaining borings for test pit exploration at approximately four (4) locations along the proposed bridge, retaining walls, and existing US 90A pavement coringforce main alignment (approximately 1,000 ft. The following field exploration program is proposedintervals) in the shoulder of the Sage Drive. Proposed bridge foundation and MSE retaining wall areas 2 (B-1 and B-4) 100 1. The planned boring test pit locations are shown on the attached Anticipated Exploration Plan. 2. Below grade at the time of our field program. Proposed bridge foundation and MSE retaining wall areas 2 (CPT-2 and CPT-3) 30 1. The planned CPT locations are shown on the attached Anticipated Exploration Plan. 2. Below grade at the time of our field program. 3. The CPTs will be terminated at identified by Lumos and reviewed/approved by the City prior to start of sampling activities. Lumos will review/summarize soil conditions encountered/documented as part of the NDOT US 50A/95A Improvements Project for proposed termination work within the NDOT Right-of-Way. Exploration depth will range from five (5) to ten (10) feet below ground surface, or to depth of practical refusal, whichever occurs comes first. Our exploration team We understand Lumos and Associates, Inc. will prepare field boring logs as part of standard drilling operations including sampling depthscomplete the USA Dig clearance, penetration distancesobtain a no cost encroachment permit will from the City, will provide the excavation/backfill services, and other relevant the traffic control. Work performed will comply with current City of Fernley Design Standards and Standard Specifications for Public Works Construction; Work performed within NDOT RoW will comply with current NDOT Standards. Lumos and Associates, Inc. herein proposes to provide sampling information. Field logs include visual classifications of materials observed during drilling and our interpretation of subsurface conditions between samples. Final boring logseach exploration, prepared from field logs, represent classify the Geotechnical Engineer's interpretation, and include modifications based on observations and laboratory tests. CPT logs will be prepared by the Geotechnical Engineer 2. Laboratory Testing The project engineer will review field data and assign laboratory tests to understand the engineering properties of various soil strata. Procedural standards noted below are for reference to methodology in general. In some cases, variations to methods are applied because of local practice or professional judgment. Standards noted below include reference to other, related standards. Such references are not necessarily applicable to describe the specific test to be performed. Exact types and number of tests cannot be defined until completion of fieldwork, but we anticipate the following laboratory testing may be performed: • Tex-103-E Determining Moisture Content in Soil Materials • Tex-104-E Determining Liquid Limits of Soils • Tex-105-E Determining Plastic Limits of Soils • Tex-106-E Calculating Plasticity Index of Soils • Tex-110-E Particle Size Analysis of Soils • Tex-111-E Determining the Amount of Material in Soils Finer than the 75 micrometer (No. 200) Sieve • Tex-118-E Triaxial Compression Test for Undisturbed Soils • ASTM D2166 Unconfined Compressive Strength of Soil • ASTM D2435 One Dimensional Consolidation Properties of Soil Our laboratory testing program includes observation of soil samples by an engineer. Based on the results of our field and laboratory programs, we will describe and classify soil samples encountered soils in accordance with the Unified Soil Classification System (USCS), and conduct laboratory testing on the samples collected. Additionally, we propose to perform engineering analysis and calculations and develop a Geotechnical Investigation Report that will discuss the geologic setting, exploration and site condition, field and laboratory test data, and our conclusions and recommendations from a Geotechnical perspective. Out Geotechnical Evaluation will specifically include the following services: Field Investigation will include:  USA Dig Clearance  Location of Exploration Test Pits  Logging of all Soil Profiles Based on USCS  Water Table Measurement, if encountered Laboratory analysis may include:  Atterberg Limits  Moisture Density Curve  Grain Size Analysis (including fines content)  R-Value  Soluble Sulfates/pH/Resistivity Report, Recommendations, and Conclusions  Exploration Logs  Soil Types and Classification  Site Geology  Laboratory Test Results  Geotechnical Discussion  Grading Recommendations  Utility Excavation and Backfill Recommendations  Pavement Recommendations (if required)  Construction Procedures  Groundwater Level, if encountered A draft Geotechnical Investigation Report will be provided in conjunction with the 90% submittal for City review and comment. The Final Geotechnical Investigation Report will be signed and sealed by a Nevada Registered Professional Engineer in responsible charge of preparation.

Geotechnical Investigation. The scope Geotechnical engineering investigation will evaluate the geotechnical conditions of services covered in this proposal consist of field explorationthe site and provide recommendations for the proposed development. The investigation will include site reconnaissance, subsurface geotechnical exploration and sampling, laboratory testing testing, engineering analysis, and the preparation of a geotechnical engineering report for report. This task will include: Subsurface exploration consisting of the drilling, sampling, and logging of hollow- stem-auger borings using truck-mounted drill rig with 8-inch-diameter augers. The borings will be drilled to the proposed pavementdepths provided below, retaining walls, and bridge. 1. Field Exploration The field exploration will consist of obtaining borings for the proposed bridge, retaining walls, and existing US 90A pavement coring. The following field exploration program is proposed. Proposed bridge foundation and MSE retaining wall areas 2 (B-1 and B-4) 100 1. The planned boring locations are shown on the attached Anticipated Exploration Plan. 2. Below grade at the time of our field program. Proposed bridge foundation and MSE retaining wall areas 2 (CPT-2 and CPT-3) 30 1. The planned CPT locations are shown on the attached Anticipated Exploration Plan. 2. Below grade at the time of our field program. 3. The CPTs will be terminated at the proposed termination depth or to depth of refusal, whichever occurs firstis shallower. Our exploration team will prepare field boring logs as part The purpose of standard drilling operations including sampling depthsthe borings is to evaluate the subsurface soil and geologic conditions at the site, penetration distancesdepth to existing groundwater, and other relevant sampling informationpercolation rates of the on-site soils. The borings will be logged, by a representative from Consultant’s geotechnical engineering team member. Relatively undisturbed and bulk soil samples will be obtained from the borings at selected intervals and the samples will be transported to the laboratory for testing. Borings that are deeper than ten feet will be backfilled with cement-bentonite grout per the requirements of LACDEH. Shallower borings will be backfilled with on-site soils. The number and depths of borings and percolation tests are as follows: • Two borings within the footprint of the gallery to depths of approximately 30 and 50 feet. The purposes of these borings are to evaluate the soils and groundwater depth below the invert of proposed gallery and to collect subsurface data for use in the design of the gallery and in-line structures. • Two borings within the footprint of the gallery to depths of up to approximately 20 feet to evaluate the infiltration rate of the soils at/near the invert depth of the gallery. • Two borings in areas of proposed bioswales to depths of approximately 5 feet to evaluate the infiltration rate of the shallower site soils for design of the shallower BMPs. • Two borings along the proposed pipeline alignments to depths of up to approximately 10 feet to evaluate the site soils along the alignment for use in design of the pipelines. Field logs include visual classifications of materials observed during drilling and our interpretation of subsurface conditions between samples. Final boring logs, prepared from field logs, represent the Geotechnical Engineer's interpretation, and include modifications based on observations and laboratory tests. CPT logs percolation testing will be prepared by performed within the Geotechnical Engineer 2. Laboratory Testing The project engineer will review field data two 20-feet deep borings within the gallery footprint and assign laboratory tests to understand two shallow borings (5 feet deep) in the engineering properties areas of various soil strata. Procedural standards noted below are for reference to methodology proposed bioswales using the “falling-head” method in general. In some cases, variations to methods are applied because of local practice or professional judgment. Standards noted below include reference to other, related standards. Such references are not necessarily applicable to describe the specific test to be performed. Exact types and number of tests cannot be defined until completion of fieldwork, but we anticipate the following laboratory testing may be performed: • Tex-103-E Determining Moisture Content in Soil Materials • Tex-104-E Determining Liquid Limits of Soils • Tex-105-E Determining Plastic Limits of Soils • Tex-106-E Calculating Plasticity Index of Soils • Tex-110-E Particle Size Analysis of Soils • Tex-111-E Determining the Amount of Material in Soils Finer than the 75 micrometer (No. 200) Sieve • Tex-118-E Triaxial Compression Test for Undisturbed Soils • ASTM D2166 Unconfined Compressive Strength of Soil • ASTM D2435 One Dimensional Consolidation Properties of Soil Our laboratory testing program includes observation of soil samples by an engineer. Based on the results of our field and laboratory programs, we will describe and classify soil samples in general accordance with the Unified 2021 Los Angeles County guidelines. Soil Classification System cuttings from the drilling will be placed in 55-gallon drums and temporarily stored at a secure location at the park. Representative samples of the drummed soils will be collected and sent to a laboratory for analytical testing to characterize the soil for disposal purposes. Following characterization, the drummed soils will be transported to an off-site disposal facility by a licensed waste hauler. For planning purposes, Consultant has assumed that seven (USCS)7) drums of soil will be generated from the drilling. Geotechnical laboratory testing of representative soil samples from the exploratory borings. Laboratory testing is anticipated to include in-situ moisture and dry density, gradation, Atterberg limits, hydro-collapse potential, consolidation, direct shear strength, and soil corrosivity. Data compilation and geotechnical analysis of data collected from Consultant’s background review, subsurface exploration and percolation testing, and laboratory testing. Preparation of a geotechnical evaluation report that presents Consultant’s findings, conclusions, and recommendations. Review and preparation of responses to one round of review comments.

Geotechnical Investigation. The scope team’s geotechincal engineer will perform a geotechnical investigation and report including: a. Review geologic and geotechnical reports relevant to the existing site conditions. b. Coordinate site access with owner personnel, ▇▇▇▇ out the proposed boring locations, and notify Underground Service Alert (USA) to review the location of services covered the subsurface explorations relative to below-ground utilities. We will arrange for a utility locating contractor to better identify the location of any utilities. c. Perform geotechnical borings within the proposed field. We propose to advance small 6 to 8-inch diameter borings using truck mounted or limited-access drilling equipment in this proposal consist selected locations to evaluate the subgrade conditions. We propose to drill six borings at the site using one day of field explorationdrill rig rental time. We assume that access to the site will be granted, including access through locked gates. One boring will be 15-feet deep, or until practical refusal of the auger is reached at a shallower depth to check for shallow groundwater conditions, and evaluate the subgrade. The remaining five borings will be shallow (less than five feet) to evaluate the subgrade. An engineer will log the borings and collect relatively undisturbed and bulk soil samples for laboratory testing and analyses. d. Conduct infiltration testing by performing two falling head percolation tests. Group Delta will conduct infiltration testing using an approved method. e. We will backfill the preparation borings and return the ground surface to the original condition, including asphalt or concrete patches where necessary. f. Conduct laboratory testing on selected soil samples to assess the pertinent engineering characteristics of a geotechnical engineering report the site soils. The specific emphasis will be on index testing for the proposed pavement, retaining wallsadditional characterization of soil properties and to further evaluate infiltration rate, and bridgemaximum dry unit weight/optimum moisture content and Expansion Index testing to evaluate subgrade characteristics. The actual program will be determined using the observations of soil types from the subsurface exploration. 1. Field Exploration The field exploration will consist of obtaining borings g. Perform engineering analysis to develop recommendations for the proposed bridgesite preparation, retaining wallsremedial grading, subgrade support, and existing US 90A pavement coring. The following field exploration program is proposed. Proposed bridge foundation and MSE retaining wall areas 2 (B-1 and B-4) 100 1. The planned boring locations are shown on the attached Anticipated Exploration Planshallow BMP design. 2. Below grade at the time of h. Prepare an illustrated report presenting our field program. Proposed bridge foundation findings, conclusions and MSE retaining wall areas 2 (CPT-2 and CPT-3) 30 1. The planned CPT locations are shown on the attached Anticipated Exploration Plangeotechnical recommendations for site development. 2. Below grade at the time of our field program. 3. The CPTs will be terminated at the proposed termination depth or to depth of refusal, whichever occurs first. Our exploration team will prepare field boring logs as part of standard drilling operations including sampling depths, penetration distances, and other relevant sampling information. Field logs include visual classifications of materials observed during drilling and our interpretation of subsurface conditions between samples. Final boring logs, prepared from field logs, represent the Geotechnical Engineer's interpretation, and include modifications based on observations and laboratory tests. CPT logs will be prepared by the Geotechnical Engineer 2. Laboratory Testing The project engineer will review field data and assign laboratory tests to understand the engineering properties of various soil strata. Procedural standards noted below are for reference to methodology in general. In some cases, variations to methods are applied because of local practice or professional judgment. Standards noted below include reference to other, related standards. Such references are not necessarily applicable to describe the specific test to be performed. Exact types and number of tests cannot be defined until completion of fieldwork, but we anticipate the following laboratory testing may be performed: • Tex-103-E Determining Moisture Content in Soil Materials • Tex-104-E Determining Liquid Limits of Soils • Tex-105-E Determining Plastic Limits of Soils • Tex-106-E Calculating Plasticity Index of Soils • Tex-110-E Particle Size Analysis of Soils • Tex-111-E Determining the Amount of Material in Soils Finer than the 75 micrometer (No. 200) Sieve • Tex-118-E Triaxial Compression Test for Undisturbed Soils • ASTM D2166 Unconfined Compressive Strength of Soil • ASTM D2435 One Dimensional Consolidation Properties of Soil Our laboratory testing program includes observation of soil samples by an engineer. Based on the results of our field and laboratory programs, we will describe and classify soil samples in accordance with the Unified Soil Classification System (USCS).