Work Plan to Locate Level 2 Adit

Standard Mine Superfund Site

Crested Butte, June 29, 2017

Contents

1 Introduction ...... 1 1.1 Purpose ...... 1 1.2 Site Location and Description ...... 1 1.3 2016 Drilling Activities ...... 2 2 SCOPE OF GEOPHYSICAL SURVEYS ...... 7 2.1 Work Tasks ...... 7 2.1.1 Survey Planning ...... 7 2.1.2 Mobilization ...... 8 2.1.3 In-Field Testing ...... 8 2.1.4 Data Collection/Recording ...... 8 2.1.5 Demobilization ...... 9 2.1.6 Data Processing and Interpretation...... 9 2.2 Health and Safety...... 10 2.3 Schedule ...... 10 3 References...... 11

Tables

Table 1. Standard Mine Level 2 Drilling Summary...... 3

Figures

Figure 1. Site Location Map ...... 5 Figure 2. Cross Sectional View of the Standard Mine Complex ...... 6 Figure 3. Proposed Seismic Line Locations ...... 13

Appendices

Appendix A.Refraction Field Form Appendix B.Resume

1 Introduction 1.1 Purpose This work plan includes steps for acquiring data, processing data, and data interpretation to aid in the locating the Level 2 adit. The information collected will be used to select the location(s) for borehole drilling intended to intercept Level 2 adit. 1.2 Site Location and Description The Standard Mine Superfund Site (U.S. Environmental Protection Agency [EPA] site identification #CO0002378230) is located in Gunnison , Colorado, approximately 5 miles west of the Town of . The Site is an abandoned hard rock mine located in Elk Basin in the Ruby Mining District in the Ruby-Anthracite Range of west at an elevation of approximately 10,900 to 11,600 feet above mean sea level. The Site is located within the boundaries of the and includes approximately 10 acres situated on a combination of both U.S. Forest Service (USFS) land and private mining claims. The Site is remote and is accessed by traveling 1.5 miles through the Mine Company (MEMCO) private property and then 2.7 miles over Forest Development Road 732. Harsh winter weather conditions and the remote location result in difficult Site access during the winter and limit the construction season. A Site location map is shown on Figure 1. The mine area drains into Elk Creek, which forms within the Site boundary and flows southward to Coal Creek, the drinking water source for the Town of Crested Butte. Copley Lake and several natural seeps discharge into Elk Creek downstream of the Site. Coal Creek flows east towards the Town of Crested Butte. The Crested Butte municipal water intake is located on Coal Creek approximately 2 miles downstream of the confluence with Elk Creek. The MEMCO Water Treatment Plant (WTP) discharges into Coal Creek downstream of the Elk Creek/Coal Creek confluence and downstream of Crested Butte’s drinking water intake. The Colorado Department of Public Health and Environment (CDPHE) is the support agency for this Site. Because the Site is partially located on USFS property, EPA and CDPHE are coordinating with the USFS on cleanup activities. USFS is considered a cooperating agency for this project, and is not responsible for funding or implementing the construction work. The Site includes several discrete areas of mining disturbance: Level 1, Level 2, Level 3, Level 4, Level 5, and Level 98. Levels 1, 2, and 3 are interconnected through a series of raises and sublevels. Level 4 consists of two shafts that connect to the Level 3 workings. Levels 5 and 98 are not connected to Levels 1 through 4 or each other. The Colorado Division of Reclamation, Mining, and Safety (CDRMS) investigated and mapped over 1,800 feet of the Level 2, Level 3, and Level 5 underground mine workings in 2006 and 2009. Figure 2 provides a Site Profile.

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1.3 2016 Drilling Activities Following the 2015 construction season, the project team developed a plan to install a well into Level 2 adit to intersect the mine pool that was observed in 2009 by CDRMS and is believed to be formed by blockage of Level 2 near the portal (CDRMS, 2009). A well into Level 2 can serve several purposes: • Monitor water levels in Level 2 adit; • Dewater the Level 2 mine pool and monitor the response following dewatering; • Monitor water levels in Level 2 adit during impoundment of MIW in Level 1 through closing the valve on the Level 1 bulkhead; and • Monitor water levels in Level 2 adit during the long-term site operation and maintenance. HDR contracted with Authentic Drilling, Inc., to perform drilling services at the Standard Mine, Crested Butte, Colorado on September 6 through 9, 2016. The services included drilling boreholes in an attempt to intercept the Level 2 adit. Once the adit was intercepted, a well was to be installed to monitor water levels in the adit and be large enough to efficiently pump impounded water in Level 2. The borehole locations were selected based on the following information obtained by HDR field technicians and site managers: • Mine maps developed by Jeff Graves during a 2009 reconnaissance of Level 2. • Onsite discussions with Jeff Graves regarding orientation of Level 2 portal. During RA work in 2012, the portal of Level 2 was excavated from above to top of water but no discernable alignment of the drift could be determined. Mr. Graves indicated the approximate position of the Level 2 portal and the area of excavation. • Historical photographs from the Denver Public Library collection of Level 2 original trestle and ore chute. • Aerial photographs of the Standard Mine site on display at the MEMCO WTP. • Measurements of the strike and dip of the Standard Fault within the Level 3 adit (Station 2+50) indicated it continued downward at a 60° dip angle. This dip angle would place the Level 2 adit approximately 35 feet southeast of the Level 3 centerline (represented by a straight line from Portal 3 to the DOWL survey stake #701). • Attempts were made to locate the original rail alignment of Level 2 at the portal using a metal detector. The alignments indicated by the metal detector have Level 2 running almost directly underneath Level 3. This could not be verified; however, as hand shoveling efforts could not find the buried rail. Heavy equipment excavation was not an option due to the threat of releasing impounded water. Based on this information, it was estimated that the alignment of Level 2 at the desired well location was approximately 30 to 50 feet southeast of the Level 3 portal centerline. HDR geologists were on site to oversee drilling operations, log drill cuttings from borings, and supervise the installation of the well. The drilling operations were not able to locate the Level 2 adit; therefore, the well was not installed during this mobilization. Four borings were drilled using an ATV-mounted CME-750 drill rig capable of performing both Hollow Stem Auger (HSA) drilling and air rotary drilling. Air rotary drilling was the only method hdrinc.com 1670 Broadway, Suite 3400, Denver, CO 80202-4824 (303) 764-1520(303) 764-1520 2 required as there was little overburden encountered at the drilling site that would necessitate HSA drilling. Pilot hole borings were advanced with a 3 7/8-inch diameter tri-cone air rotary drill bit. The four borings were drilled to depths ranging from 83 feet below ground surface (bgs) to 89 feet bgs and were located approximately 30 to 50 feet southeast of the Level 3 portal centerline in an area thought to be directly above (approximately 70 feet vertical) the Level 2 adit. Borings were approximately 6-feet apart. The boring locations summarized in Table 1 as follows:

Table 1. Standard Mine Level 2 Drilling Summary Total Drilled Depth Depth to Water Boring ID Lithology (ft bgs) (ft bgs)

1 83 38.65 Wasatch Fm., Metamorphosed mudstone (slate) 2 84 40.41 Wasatch Fm., Metamorphosed mudstone (slate) 3 89 40.20 Wasatch Fm., Metamorphosed mudstone (slate) 4 84 39.80 Wasatch Fm., Metamorphosed mudstone (slate)

Drill cuttings were collected directly from the air discharge hose at approximately 10 foot intervals and described on the Boring Logs. All borings indicated that the Wasatch Formation was encountered throughout the drilling operation and was described as a very hard, competent, metamorphosed mudstone (slate). Some zones of weathering displaying mineralized (iron oxide) fracture faces were also encountered and generally coincided with increased drilling rates. Upon determining that the fourth boring did not intersect Level 2 adit, HDR decided to cease drilling operations. During project demobilization activities several weeks later, a mini-excavator was working on repairing erosion control channels when it discovered the original Level 2 rails. The narrow-gage rails were set roughly 18” apart and appeared to be in very good condition, with minimal rust degradation. With a small file, the rust was removed and clean, solid steel was exposed. The HDR Resident Project Representative rented a Subsite 150 R/T Utility Locating System to attempt to trace the rail underground. This system is specified to be able to track utilities up to 15 feet underground, depending on the gage or diameter of the utility wire. Due to the large ferrous mass of the rails, it was anticipated that the detection depth would be significantly greater than 15 feet. The utility locating system works by setting up the base station and connecting the transmitter to the utility wire using alligator clamps. In this case, the webbing of the rail was filed clean of rust for the clamps. The handheld receiver is then turned on and set for sensitivity. The left rail, which was more degraded and buried, was tested first. After tracing less than 10 feet, the signal became very weak and ran out even with the sensitivity turned all the way up. The more exposed rail on the right was then tested and had similar results. Because this rail is somewhat bent at the surface, it is possible that this rail is disconnected from the rest of the buried rail. A third attempt proved successful after the left rail was cleaned and filed more thoroughly. The clamps were re-attached and the sensitivity system immediately showed better results. The system traced the rail immediately in a NNW direction, counter to the direction estimated based on the prior research. After approximately 30-40 feet, the rail alignment slowly curved back toward the northeast. After 60 feet, the alignment straightened, heading toward the Level 3 portal. The signal faded at a consistent rate as the vertical distance increased up the hillside. At approximately 100 hdrinc.com 1670 Broadway, Suite 3400, Denver, CO 80202-4824 (303) 764-1520(303) 764-1520 3 feet (approximately 50 – 60 feet vertical), the signal was lost just below the outfall of the Level 3 pond. A lath stake was installed and photo documented. Based on this information, it is estimated that Level 2 adit is located to the southeast of the Level 3 portal between the portal and the boreholes from the drilling investigation. The approximate location of the traced rail is shown on Figure 3. Further geophysical investigations are recommended to gain a more confident interpretation of the Level 2 adit prior to drilling (2017 drill program). With the level of effort required to mobilize and drill test holes, the further use of geophysics would be beneficial to the project and will help reduce the number boreholes required to find the adit. The utility tracing device described above, has given an indication of the location of the rails. However, the accuracy of these devices especially at depths greater than the manufactures estimated depth range can be unreliable. By utilizing a second geophysical method (seismic refraction tomography) as well as a higher output electromagnetic utility locator, a more confident interpretation of the adit location can be made.

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Figure 1. Site Location Map

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Figure 2. Cross Sectional View of the Standard Mine Complex

Sketch from SAIC Standard Mine EE/CA, 2004, courtesy EPA

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2 SCOPE OF GEOPHYSICAL SURVEYS

Details on the survey methodology, acquisition parameters, processing and reporting are included in the following sections. Steps that will be taken as part of quality control during seismic data collection are included in section 2.1.4 below. Documentation of these checks will be included on field data sheets, see Appendix A. 2.1 Work Tasks The following work tasks are designed to give a general work flow and outline key activities that will take place under each task. Work tasks include planning, mobilization, equipment layout, in-field testing, data collection/recording, demobilization, and data processing/interpretation.

2.1.1 Survey Planning HDR’s plan for this project is to conduct a surface seismic survey, coupled with a confirmation electromagnetic (EM) and magnetic survey of the Level 2 rails. The rail survey will confirm, and possibly enhance, the information on the alignment of the Level 2 adit, whereas the high resolution refraction tomography will attempt to locate the adit by collecting data along 2 (and possibly 3) seismic survey lines intersecting the adit. The rail survey will generally follow the procedure used for the initial survey, described earlier, except that it will test multiple frequencies and use those that provide the best detection. For this project, HDR will use an RD7100 high-precision cable and pipe locator. This instrument consists of a transmitter and receiver, designed to produce a selection of unique signals than can be detected at the ground surface. During the survey, we will record the rail alignment with a hand-held GPS. The seismic survey will include 2 seismic lines (or possibly 3, based on available time in the field) to provide coverage of the study area and comparison between lines. Figure 3 shows the preliminary geophysical survey locations and geometric configuration. Actual line locations will be adjusted while onsite to minimize topographic inflections along the lines and avoid surface obstructions. The survey will consist of a 24 to 48 channel seismic system with 5 to 10 foot geophone spacing. The collected field data will be processed using refraction tomography software. The objective of the refraction data processing is to use P-wave energy to produce 2D velocity profiles across the proposed study area/drill site. From these velocity profiles, the adit will be imaged due to lower velocity of the air/water within the adit in comparison to the surrounding bedrock. We understand that the survey area creates many challenges, including limited access, steep terrain and vegetation that may prevent very long lines, or offsets over the area of interest. For the seismic surveys we will need to position the seismic lines within accessible areas with a working length for each proposed line of up to approximately 500 feet. The seismic survey includes: planting geophones (sensors) into soil (coupled by inserting spikes attached to each sensor into the soil); connecting the geophones to a cable that transmits the seismic signal to the recording device (seismograph); creating seismic elastic waves with a sledge hammer (or similar) hitting the ground surface; and recording the signal received by the geophones.

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2.1.2 Mobilization The mobilization includes not only getting personnel and equipment to the site but also measuring and laying out the seismic line locations. We do not plan on any brush removal and will locate lines around mature trees and other large obstacles. Some light trimming or grubbing may be needed if light undergrowth is present and cannot be avoided in the survey area. Handheld GPS will be used to record the survey lines and receiver offset locations. A GPS with 1-2 meter accuracy will be used to record equipment layout.

The physical layout of the seismic equipment requires detailed oversight and skilled crews experienced in deploying instrumentation. The work flow of the line layout is to first locate the correct recording position by either staked location or GPS position. Geophone frequency has been selected for the expected energy band of the source and site geology. We intend for the data collection to be scheduled on days when no other site activities are performed. It is crucial to plan site survey activities such that the seismic data recordings will not contain undesired “background” noise that can significantly reduce data quality.

For safety, the field crew will minimize carrying heavy equipment by breaking down cables and geophones into smaller groupings and planning routes to reduce walking over uneven surfaces when possible. Our seismic survey crew will consist of:

• a trained geophysicist (Glendon Adams resume in Appendix B) • the Resident Project Representative (Travis Snyder), and • a staff geophysicist 2.1.3 In-Field Testing The testing of the seismic survey equipment consists of checking the geophone connections and the operation of the energy source and recording device. The testing allows the parameters, such as record length and sampling interval to be set to best record the source signal. The hammer source is operated by impacting a thick metal strike plate placed on the ground by a moving mass. The mass is accelerated by downward force applied by the operator. To produce a consistent and stackable signal the operator must be skilled in applying similar downward force and prevent the weight from bouncing on the strike plate. Variation in force velocity and strike angle can change the frequency content of the signal transmitted into the ground. The number of impacts that will be stacked at source location will be tested to optimize signal-to-noise ratio at long offsets. Source settings will be adjusted and test data records will be viewed in real-time.

2.1.4 Data Collection/Recording The rail survey will document the Level 2 adit alignment and will use several induced frequencies to confirm and attempt to extend the rail detection closer to the existing forest road and Level 3 adit entrance. HDR will record the GPS coordinates of the detected alignment. For the seismic survey, data collection commences after the optimization of the project recording and source parameters based on in-field testing results. The recording system performs a status check to verify that the equipment is properly deployed and fully enabled to record data. This check includes internal board tests, amplifier and signal conditioning checks, battery level, memory availability, and double-checking or adjusting recording parameters. Once the recording system has been checked, the source operator tests the system triggering switches used at the source. The source locations and record timing will be adjusted/set based upon the field testing phase, and system checks and final collection parameters will be recorded on field data sheets. Periodically hdrinc.com 1670 Broadway, Suite 3400, Denver, CO 80202-4824 (303) 764-1520(303) 764-1520 8

while collecting data, the seismic systems will be checked again to be sure the system is operating correctly, specifically after powering down or changing batteries during data collection. The anticipated data collection equipment and parameters at each survey line include: single 24- channel Geometrics Geode Seismograph for multiple line segments or two sync-ed 24-channel Geometrics Geode Seismographs, along with 24-48 8-14 Hz geophones spaced 5-10 feet apart. The seismic source will be a 15 to 20-lb hammer. Geometrics Seismodule Controller software will be used to monitor and acquire 250-500 millisecond (ms) records with 0.25-0.5 ms sample rate. Typically, 10-15 shot records will be real-time stacked for all shot locations along and off-end shots for each seismic line. Raw data will be exported from the Geode system and used as SEG2 format for refraction processing or converted into .sgy (SEGY) format for other processing. Elevation data along the acquired lines will be required for processing. Elevations along the survey lines will be extracted from site topographic maps using recorded GPS locations. 2.1.5 Demobilization The HDR field team will retrieve the equipment and will avoid bundling it to reduce carrying bulky and heavy equipment across uneven terrain. Each geophone will be picked up and counted to ensure no equipment is left in the field. Position markers for receiver locations will be also picked up, except for line end-stakes that will be left for reference during drilling activities. Equipment will be loaded for transport off site and final checking of equipment inventory will be made. One key component of this final equipment check is accounting for all the data files to be sure all data has been saved and backed up prior to any of the recording instruments leaving the site.

2.1.6 Data Processing and Interpretation. GPS data collected during the rail survey will be plotted on a site map. Data collected during the seismic survey will be processed as seismic refraction tomography.

Refraction Tomography Processing

The refraction tomographic processing software we plan to use for this project is Rayfract, by Intelligent Resources, Inc. This 2D tomographic processing software utilizes processing algorithms based on the XTV (depth-time-velocity) and Delta-t-V inversion methods of common mid-point (CMP) data (Diebold and Stoffa, 1981). The XTV inversion reconstructs the 1D velocity/depth function below a CMP based on XTV data triples (Winkelmann, 1998 and Gawlas, 2001). The inversion is based on the layer stripping principle and XTV uses three separate methods for the data triple as follows: Modified Dix inversion, Intercept Time Inversion, and Gradient layer inversion (or Delta-t-V method). Since the processing is based on a layer stripping approach, the inversion starts with the first XTV triple at the smallest offset. Once the first layer has been determined by one of the three methods of the triple, the offset and time are advanced to the next layer. The triple inversion process is continued iteratively until all the XTV triples have been processed. Data will be filtered using a consistent band-pass frequency filter and automatic gain control (AGC) set to enhance the resolution of the first-break energy. Picking of first breaks will be performed manually, and first break times will be utilized by the program to perform velocity inversion and generate tomographic models. We feel this robust tomography processing method provides details of velocity structure better than other tomographic software.

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2.2 Health and Safety The primary objective of survey planning is to develop the best way to acquire the highest quality data in the safest manner. All crew members have gone through internal safety training required by our company, including many with additional training such as OSHA 40-hour HAZWOPER, First Aid and CPR training. In addition, all crew members will take part in daily “tailgate” safety meeting where site specific hazards and daily activities will be discussed.

All crew members will be required to follow HDR’s Health and Safety Plan for the Standard Mine Superfund Site. Minimum PPE requirements include: • Hard hats (if required) • Safety glasses with side shields (if required) • Safety boots • Safety vest (if other activities are concurrent with the surveys) • Hearing protection (source operators) • Additional PPE requirements may be required based on Job Hazard Analysis completed prior to the start of field activities

2.3 Schedule We understand the multiple constraints to the project schedule. We recommend a 3-day field program beginning on July 10, 2017, with the preliminary data report issued by August 9. The final report will be issued within two weeks of receiving client comments.

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3 References

Diebold, J.B. and Stoffa, P.L., 1981, The traveltime equation, tau-p mapping, and inversion of common midpoint data, SEG Geophysics, vol. 46, pp. 238-254. CDRMS, 2009 Underground Investigation of Standard Mine Level 2, Gunnison County, CO; October. Gawlas, P. F., 2001, Ph.D. Thesis. Possibilities of a DMO Process in the CMP Refraction Seismics, LMU Munich: Faculty of Geosciences. (http://edoc.ub.unimuenchen.de/archive/00000222/01/Gawlas_Peter.pdf). Winkelmann, R.A., 1998, Ph.D. Thesis. Development and Application of a Wave Field Procedure for Evaluation of CMP-Sized Refractive Inserts. Academic Publishing Munich, Munich.

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Figure 3 - Proposed Seismic Line Locations

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Appendix A Refraction Field Form

Refraction Field Form Date: Line #: Line Location: Quality Checks on Recording System Job #: Starting Sta: Ending Sta: Internal board/amplifier tests: Y N Site Location: Line Orientation: Geometry set and checked: Y N Eq: # of Channels: Phone Spacing: S/N or walk-away tests: Y N Sample Interval: Shot Spacing: Battery status checked: Y N Record Length: Roll or Overlap: Trigger system checked: Y N

1 24 48

Ele.___ Ele.___

File Name Shot # Shot Station Offline Offset Notes (noise source, # stacks, delays)

Observer: Crew: General Notes:

Appendix B Resume

Glen L. Adams

Senior Geophysicist

Mr. Adams is a knowledgeable geophysicist and project manager with over 19 years of geophysical surveying experience. He has been responsible for proposals, client consultation, project planning, QA/QC controls, project EDUCATION execution, subcontractor management, data processing, and project Bachelor of Science, reporting. In addition, Mr. Adams has played a leading part in organizing Geology & Geophysics, Missouri University of many engineering and environmental geophysical studies using various Science and Technology technologies, including ground penetrating radar, shallow seismic, (formerly University of Missouri-Rolla), 1997 electromagnetics, magnetics, and resistivity. In his 19 years of professional experience, Mr. Adams has performed geophysical surveys for lithological Masters of Science, Geology & Geophysics, Missouri studies, buried pipeline rights-of-ways, site assessments, geophysical University of Science and logging for fault studies, seismic velocity measurements as input for site Technology (formerly University of Missouri-Rolla), models, forensic investigations, quarry blasting, and UST location/ site 1998 environmental characterizations.

REGISTRATIONS Professional Geoscientist – RELEVANT EXPERIENCE Texas (No. 4308)

Registered Geologist – Ascension Pipeline Company LLC, Ascension Pipeline GSSI , Lafayette, Missouri (No. 2005004566) Louisiana . The Ascension Pipeline will extend appoximately 32 miles from a Professional Geophysicist- crude oil refining facility in Ascension Parrish to a second refining and California (No. GP 1091) storage facility in St. John the Baptist Parrish. The geophysical investigation PROFESSIONAL included selective use of Ground Penetrating Radar, Electromagnetics, MEMBERSHIPS Radio Frequency utility locator, and sub-bottom profiler to delineate crossing EEGS “Environmental and Engineering Geophysical utilites in a challenging marsh enviroment. As Senior Geophysicist, Mr. Society”, Member Adams was charge of data collection oversight and documentation of foreign AEG “Association of line crossings of proposed pipeline. Environmental & Engineering Geologist”, Member Role: Sr. Geophysicist Date: OCT-2016 INDUSTRY TENURE 19 years Xcel Energy, Xcel Pipeline Delineation Program New Mexico, Oklahoma, HDR TENURE Texas, Colorado, < 1 year HDR was engaged by Xcel Energy Company (Xcel) to delineate OFFICE LOCATION underground oil and gas infrastructure in and around proposed Xcel above Englewood, CO ground electrical transmission lines. As part of the desktop analysis publicly PUBLICATIONS available pipeline and other oil and gas infrastructure data sets were Zellman, M., Thackray, G., Altekruse, J., Protti, B., collected and mapped on a series of map sheets and verified in the field to Colandrea, H., Adams, G. , the extent practicable. In addition during the field effort potential pipeline

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Glen L. Adams, P.G. (TX), R.G. (MO), P.Gp. (CA)

Ostenaa, D., O’Connell, D., locations as indicated by scars , aboveground infrastructure and utility locates Turner, J., 2015, Shallow Seismic Investigation of the were evaluated and recorded. Field data were added to the maps to provide Teton Fault, Grand Teton a comprehensive picture of existing underground infrastructure that could National Park, Wyoming (Poster), Basin and Range potentially be affected by the proposed project. Seismic Hazard Summit III. Role: Sr. Geophysicist Adams, Glendon, 1998, Date: JAN-2017- ongoing Application of the High- Resolution Shallow Reflection Seismic and the Xcel Energy, Electrical Resistivity Program New Mexico, Texas, United Ground Penetrating Radar Techniques to the Detection States of Karstic Hazards to HDR was engaged by Xcel Energy Company (Xcel) to evaluate the Roadways in Central Missouri: University of subsurface soils along proposed transmission line corridors and generate Missouri Press. corrosion potential and grounding models. As part of this engineering

Adams, G. , Goesmann, G., service electrical resistivity profiles were conducted at select loctions along Newton, T., Anderson, N., multiple corridors to measure the soil electrical properties. These collected Hatheway, A., Shoemaker, M., Shaw, A., Baker, J., resistivity values were used by HDR’s modeling group to deliver highly 1998, Ground-Penetrating reliable subsurface models for the projects. Radar (GPR) and Shallow Reflection Seismic Surveys Role: Sr. Geophysicist for Mitigation of Karstic Damage to I-44, Springfield, Date: MARCH-2017- ongoing Missouri: 1998 Highway Applications of Engineering UGI Utilities (UGI), Carlisle Pipeline, Carlisle, Pennsylvania. The Carlisle Geophysics with an Pipeline is a distribution line that will connect approximatley 3.5 mile linear Emphasis on Previously Mined Ground, Missouri area in southern Carlisle, PA. Due to construction delays from unexpected Department of rock excavations, UGI asked HDR to perform a rippability study and help Transportation Publishers, Presented to the Symposium determine shallow rock within select location along the proposed pipeline of Missouri Department of route. As Senior Geophysicist, Mr. Adams was charge of data collection Transportation. oversight and data processing/interpretation. AWARDS Role: Sr. Geophysicist ACEC Missouri Grand award for Subsurface Utility Date: OCT-2016 Engineering Project, “Safe and Sound Bridge Project”, 2008, lead team member.

NON-HDR EXPERIENCE TVA- Sequoya Nuclear Power Plant Seismic Hazards Evaluation Project, Enercon , Soddy-Daisy, Tennessee (01/2016). Senior Geophysicist and field lead on a joint project with the University of Texas, to collect very deep seismic velocities. Utilizing a large vibratory source vehicle, both SASW and passive array seismic data was collected to help establish seismic site hazards below the active nuclear plant. Industry Apartments Site Evaluation, Confidential Client , Denver, Colorado (2016). Senior Geophysicist – Plan and conduct electromagnetic

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Glen L. Adams, P.G. (TX), R.G. (MO), P.Gp. (CA)

and ground penetrating radar surveys to search for suspected underground storage tank and abandond large diameter sewer line prior to ground improvements. During ground improvments performed shear wave testing (Vs30) to assist in determining seismic site classification. NEXUS Pipeline Project, Confidential Client , Ohio-Michigan (02/2015 – 07/2016). Geophysical Lead, Technical lead for geophysical data collection and reporting on a 250 mile pipeline design project, including geotechnical site investigations in parallel. This multi-phase project included seismic refraction, and MASW (S-wave velocities), electromagnetic profiles, resistivity tomography, and 4-pin resistivity soundings. Boundary Dam Shear Wave Assesment, MWH Global , Metaline Falls, Washington (10/2015). Senior Geophysicist - Provided field data collection of surface waves as part of the shear wave velocity study. The velocity study was coupled with a boring program as part of a slope stability study and siesmic hazard assessment. Alaska LNG Geophysics and Geotechnical Investigations, Confidential Client , Prince William Sound and Cook Inlet Region , Alaska (2014-2015). Onshore Geophysical Survey Lead - Technical lead for onshore geophysics on a large geophysical and geotechnical site investigation for the proposed new LNG facility. This multi-year project included seismic reflection, refraction, and MASW (s-wave), downhole seismic, E-logging surveys, and electrical resistivity tomography. Boundary Dam Shear Wave Assesment, MWH Global , Metaline Falls, Washington (10/2015). Senior Geophysicist - Provided field data collection of surface waves as part of the shear wave velocity study. The velocity study was coupled with a boring program as part of a slope stability study and siesmic hazard assessment. GPR Void Detection Survey, Huddelstone Berry Engineering , Grand Junction, Colorado (08/2015). Senior Geophysicist – Provide project oversight and data processing/reporting for ground penetrating radar survey to detect void below concrete floor of a hospital. The nondestructive survey was followed up with confirmation cores and subgrade remediation. Sanitation Effluent Outfall Tunnel Project, Sanitation Districts of Los Angeles County, California , Palos Verdes Peninsula, California (02/2014). Senior Geophysicist - Provided survey planning and data collection oversight for a challenging urban seismic reflection survey. Challenges included utilizing Vibroseis within city streets for long continuous seismic lines to help delineate deep rooted faulting that may impact the proposed tunnel at

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Glen L. Adams, P.G. (TX), R.G. (MO), P.Gp. (CA)

specified known fault crossings. Landfill Boundary Delineation, Kinder Morgan , Bossier Parish, Lousiana (6/2014). Senior Geophysicist – Survey planning and exicution to use electrical resistivity tomography to help define the limits of an abandoned/unregulated landfill prior to directional drilling activities. Susitna-Watana Dam Seismic Hazard Studies, Alaska Energy Authority , Anchorage, Alaska (2013). Senior Geophysicist - Provided data collection and evaluation for a site-specific seismic hazard analysis for the proposed Susitna-Watana Dam and 600 MW hydroelectric power development project. The geophysical study included collection of shear-wave velocity data (MASW) at existing and proposed strong motion/seismic monitoring stations. Survey locations were very remote and required highly portable gear and crew, accessible only by helicopter. Diablo Canyon Power Plant 3D Seismic Project, PG&E , Avila Beach, California (10/2012 – 01/2013). Senior Geophysicist Onsite Seismic Data Collection Manager – Performed data collection oversight and data QA during data collection, assisted with data processing and nuclear QA documentation for software validation/processing procedures. Project involved 3D seismic data collection for a detailed fault study near/under an operating nuclear power plant following NQA requirements. Chokecherry Wind Farm Project, Power Company of Wyoming , Carbon County, Wyoming (04/2013). Senior Geophysicist – Performed data collection oversight for seismic refraction data colleciton at three proposed borrow pit sites to delineate rock depth and estimate of rock quality. Responsibilities included managing/coordination of subcontractors, task budgeting, schedule and processing/interpretation of geophysical data. NON-HDR TRAINING OSHA 40-Hr Hazwoper Health and Safety Training (29 CFR 1910.120), 1999 OSHA 8-Hr Hazwoper Refresher Health and Safety Training current American Red Cross First Aid and CPR, 2015 Electrical Resistivity Training Course and Resistivity Imaging Seminar, Advanced Geosciences Inc. MASW/SurfSeis Workshop/training, Kansas Geological Survey.

Fundamental of Professional Pratice, ASFE.

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