Att_03_Geotechnical_Evaluation_Report.pdf

REPORT COVER PAGE

SS1.3 Geotechnical Evaluation Report

YELL 313116 - Rehabilitate and Reconfigure the Laurel Dormitory at Old Faithful

Yellowstone National Park, WY July 30, 2021

Terracon Project No. C4215000

Prepared for:

DJ&A, P.C.

Missoula, MT

Prepared by:

Terracon Consultants, Inc.

Great Falls, MT

Terracon Consultants, Inc. 1392 13 t h Ave SW Great Fal ls, MT 59404 P (406) 453 5400 F (406) 761 6655 terracon.com

REPORT COVER LETTER TO SIGN

July 30, 2021

DJ&A, P.C.

125 Schoolhouse Loop Missoula, MT 59901

Attn: Mr. Kyle J. Gauthier, P.E.

P: (406) 721-7360 E: kyle@djanda.com

Re: SS1.3 Geotechnical Evaluation Report YELL 313116 - Rehabilitate and Reconfigure the Laurel Dormitory at Old Faithful Yellowstone National Park, WY Contract No. 140P1220D0002, Task Order No. 140P2021F0140 Terracon Project No. C4215000

Dear Mr. Gauthier:

We have completed the SS1.3 Geotechnical Evaluation services for the project referenced above.

This study was performed in general accordance with the Scope of Services (SOS) for Task Order No. 140P2021F0140 dated April 7, 2021 and subsequent signed Professional Services Agreement dated May 18, 2021. This report presents the findings of the geothermal investigation for the planned project.

We appreciate the opportunity to be of service to you on this project. If you have any questions concerning this report or if we may be of further service, please contact us.

Sincerely, Terracon Consultants, Inc.

Brian Evans Senior Staff Geologist

Matthew D. Hoffmann, P.E. Brian J. Williams, P.E., P.G.

Office Manager Senior Geotechnical Engineer

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REPORT TOPICS

INTRODUCTION

EXPLORATION METHODS

ATTACHMENTS

Note: This report was originally delivered in a web-based format. Orange Bold text in the report indicates a referenced section heading. The PDF version also includes hyperlinks which direct the reader to that section and clicking on the GeoReport logo will bring you back to this page. For more interactive features, please view your project online at client.terracon.com.

ATTACHMENTS

PHOTOGRAPHY LOG

FIGURES

Note: Refer to each individual Attachment for a listing of contents.

http://client.terracon.com/

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INTRODUC TION

SS1.3 Geotechnical Evaluation Report YELL 313116 - Rehabilitate and Reconfigure the Laurel Dormitory at

Old Faithful Yellowstone National Park, WY

Terracon Project No. C4215000 July 30, 2021

INTRODUCTION

This report presents the results of the supplement services associated with geotechnical evaluation of the Laurel Dormitory and vicinity at the Old Faithful area of Yellowstone National Park (YNP). The services performed included performance of soil temperature and gas monitoring conducted at the existing Laurel Dormitory area, and acquisition of high-resolution thermal infrared aerial imagery and at adjacent to the Laurel Dorm.

Soil Thermal and Gas Survey

The current soil thermal and gas survey was conducted to update the soil thermal (soil temperature) and soil gas (CO2 and H2S) conditions in the area of the Laurel Dorm. The intent of the exploration effort was to obtain current soil temperature and soil gas levels at or as near as possible to the test locations performed previously by Tetra Tech (Tetra Tech Project No.

550365.100) in June 2010. It is our understanding that the data provided herein will be used to compare relative changes in temperature and gas readings over the 11 year period between the original Tetra Tech survey and the data acquisition conducted under this contract.

Of note, some variation in data acquisition procedures are likely to have occurred between the two surveys, as the Tetra Tech team was not able to be consulted (insofar as the testing protocols;

i.e., thermal test measurement duration they used during the 2010 study) prior to initiation of our field efforts. Therefore, every effort was made to obtain consistent data, as described below, between our current field exploration and the 2010 Tetra Tech efforts. Of particular note is the procedure in acquisition of temperature data. In our survey, the field staff obtained temperate measurements from each boring and depth by allowing the temperature probe to stabilize, with minimum stabilization times on the order of 3 minutes and some as long as 15 to 20 minutes per measurement. Also, it was observed during our recent efforts that to aid in the stabilization process, the probe was generally left in a boring location between readings so as to not let the temperature probe continually fluctuate between subsurface temperature and ambient air temperature, which required longer durations for stabilization in the borings.

As part of the survey, a private utility locator (GeoSearch Services LLC of Great Falls, MT) was utilized to scan the area using both ground penetrating radar (GPR) and electro-magnetic (EM) technologies to locate utilities and to prevent any potential conflicts between the new hand borings and existing buried utilities in the project area.

SS1.3 Geotechnical Evaluation Report YELL 313116 - Rehabilitate and Reconfigure the Laurel Dormitory at Old Faithful Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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High Resolution Infrared Imagery Collection

In addition to the thermal and gas soil study, our services include the acquisition of high resolution thermal infrared aerial imagery at and adjacent to the Laurel Dorm. Per the contract specifications, the aerial survey area included an approximately 1 kilometer (km) by 1 km area, with the Laurel Dorm area being located near the northeast corner of the subject overflight zone. Also, per the contract, the imagery was conducted at a nominal flight altitude of 1,500 feet above mean terrain, with the data being acquired at a spatial resolution of less than 1.5-foot and an accuracy of less than 3 inches. In a manner similar to the recent acquisition of the soil gas and soil thermal data, the thermal infrared aerial imagery acquired under this contract will be compared to the data acquired from a 2015 flight mission to evaluate possible variations in aerial extent and temperature for the study area.

The image acquisition was completed by Aerial Thermal Imaging of Bountiful, UT on June 20, 2021, flying at an Elevation of 1500 feet above ground level (AGL). The size of the high resolution infrared imagery was approximately 1km square encompassing the Laurel Dorm site and surrounding area. The flight, data acquisition, and post-processing were conducted in general accordance with the Scope of Services. As required, the infrared imagery deliverable includes a mosaic raster file (photo included in our Photography Log for review), GIS-related files, and in MapTemp with 12-month account access. Digital data transfer will be conducted concurrently with delivery of this report. The MapTemp data can be accessed at:

o http://maptempsoftware.com/ o User Name: Yellowstone@AerialThermalImaging.com o Password: Y3LloSt0n#

There are a few items of note regarding this deliverable. A thermal camera is, in general, a poor instrument for measuring actual temperature. (Ultra-high resolution terrestrial scanners generally provide much better data, but access to such equipment is generally restricted to government agencies, and not required under the current contract specifications.) Insofar as the performance and data acquisition of data with a thermal camera, camera setup involves “teaching” the camera the correlation between acquired temperature versus the temperature interpreted by the camera.

The correlation between acquired and “measured” temperatures is calibrated in a laboratory, based on a known radiation source of actual temperature values. The known radiation source is changed many times to different temperatures and the camera “learns” these different temperatures based on intensity. If a thermal camera is trained 20 different temperatures, it figures the difference of these temperatures in interpolation. Another item that assists a thermal camera in estimating a surface temperature is ambient air temperature. Ambient air temperature is calculated into an equation giving an approximation of temperature. This data for the mosaic created was collected at 1,500 ft above mean terrain so the accuracy collected is not as if the data were acquired at the ground surface, which represents the trade-off in collecting more http://maptempsoftware.com/ mailto:Yellowstone@AerialThermalImaging.com

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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“accurate” thermal data at the surface versus being able to acquire normalized data over areas which could be hazardous to access and measure from the ground. The last item that needs to be considered for temperature estimating is emissivity. This is a surface ability to emit or reflect radiation. Some items in this deliverable are very reflective, especially metal rooftops. The data measured for such structures are, in an absolute sense, not accurate, and are instead indicative of reflected atmospheric temperatures.

Another item to consider on this deliverable. There are some extremely warm spots on this map that are represented in white. There are also cold spots on this map represented in black. To get a visual deliverable to provide a decent amount of data visually, the temperature at a certain hot and cold point had to be controlled to provide the gradient presented. In this particular deliverable anything above 120°F is white. Even if it is much hotter in real life, the maximum temperature this deliverable will reveal is 120°F. Same thing on the cold in which the low temperature was cut off around freezing points. Anything below that, especially a metal roof that is reflecting the lack of radiation from outer space will appear colder than 32°F.

A final issue to consider when interpreting the acquired thermal data is that a thermal camera is an excellent instrument at developing relative temperature data, especially in portraying temperature variations in the form of a gradient. On a qualitative basis, this is likely the most valuable information as it shows the temperature difference from one area to another. The contrasting between these areas is accurate. If the user would like to adjust the temperature values on the attached MapTemp deliverable, we recommend that they start with a new raster and develop a new map in MapTemp. We also recommend leaving the original MapTemp image deliverable as a control file. The attached .jpg is a raster that will work for this purpose.

EXPLORATION METHODS

Field Exploration

Number of Borings Boring Depth (inches) Planned Location

447 of 474 10-30 As provided from 2010 Tetra Tech report

27 of 474 eliminated Utility conflicts

Subsurface Exploration Procedures: Terracon personnel including Brian Evans, Jordan Schaefbauer and Travis Gilskey conducted the soil gas and temperature monitoring at the site between the dates of June 2 and June 22, 2021. Prior to the data collection process, Jordan Schaefbauer and Brian Evans marked out the boring locations using a similar grid pattern to best fit the locations identified and provided in the Tetra Tech report from 2010. Using the same grid pattern, sample points were marked in a ten-feet by ten-feet grid pattern, using points identified in the field that matched those found in the Tetra Tech report, as a baseline reference. A shape

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

Responsive ■ Resourceful ■ Reliable 4 file was not provided so a best fit approximation was incorporated from the start. These borehole coordinates were recorded using a Leica Model GS14 GPS/GLONAS system with a horizontal precision of 0.026 feet plus 1 ppm (part per million) and the datum NAD 1983 Wyoming State Plane. Following the delineation of borehole locations, three-quarter inch diameter holes were drilled using a Milwaukee Cordless rotary hammer and/or a Hilti electric rotary hammer using either a 36-inch or 24-inch long drill bit. The borings were drilled at ten-inch intervals to a maximum depth of thirty inches, where applicable. In locations where clay (particularly red or reddish clay) was encountered, the borings were terminated at ten or twenty inches respectively. Figure 2 shows the boring grid layout; and all sample locations are included in Table 1.

At each ten-inch interval (10-inch, 20-inch and 30-inch depth below ground surface) measurements of CO2, H2S, and soil temperature (in degrees Fahrenheit) were collected and recorded in accordance with the sample depth protocols apparently employed in the 2010 Tetra Tech report. The temperature data was converted to degrees Celsius for reporting purposes. In an attempt to maintain consistency between data sets, the same monitoring units were used for data collection as used in the 2010 survey by Tetra Tech. An RKI® Eagle 72-5401RK gas monitoring unit was used to collect CO2 concentrations. The H2S concentrations (parts per million) were collected using a RAE® QRAE III meter, and the soil temperatures were measured using a TSI Velocicalc® meter. The meters were calibrated from the factory by Premier Safety and rechecked daily to zero ambient air conditions consistent with Tetra Tech procedures in 2010.

Using the same conversion as Tetra Tech, CO2 measurements were converted from percent in air volume as measured in the field to parts per million (ppm) using the following formula:

1% CO2 by volume = 10,000ppm, so Result X 10,000 = total ppm

Based on the Scope of Services (SOS), exploration was not to exceed 30 inches in depth for the borings, and boring advancement was specifically not to penetrate the red clay confining layer.

Of the 474 identified drill locations, of which only 447 completed, only 71 reached 30 inches in depth. Where the red clay layer did not terminate borings prematurely, several other factors contributed to shallow (or complete) boring termination as follows:

· Boring location was within identified underground utility trench location

· Utility locates could not access borehole location

· Red clay or clay confining layer was encountered

· Wet conditions or water in the boring

· Caving conditions of the boring

· Not enough clearance for equipment (crawl space)

· Boring located in mapped wetland

· Borings drilled to depth to match Tetra Tech depths

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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The crawl space area of the Laurel Dorm was also investigated to match the Tetra Tech report.

A similar 10 feet by 10 feet grid pattern spacing was used in the crawlspace as best replicating Tetra Tech’s layout. Some of the locations were slightly adjusted as the layout as shown in the Tetra Tech report and plans did not fit as clearance was less than 18 inches in some locations.

A total of 28 borings were completed in the crawlspace area, with 7 being drilled to 30 inches.

One boring was eliminated due to clearance issues with the equipment. The remainder of the holes were drilled to 20 inches, matching Tetra Tech boring depths and/or due to clay being encountered at that depth.

Soil Temperature and Soil Gas Concentration Results

A summary of the field results is presented in Table 1. Figures 2 through 6 show the CO2 and temperature measurements obtained for the 10-inch and 20-inch depths as represented similarly to the Tetra Tech report for ease of comparison and cross-referencing. As with the 2010 investigation, only a limited number of borings were completed to the 30-inch depth and therefore are not provided on a separate Figure. As summary of the statistics for each 10-inch increment is reported as follows:

10-inch depth statistics:

· Soil temperature ranged from 18.6 to 41.2 degrees Celsius

· The average soil temperature was 28.3 degrees Celsius

· Carbon dioxide concentrations ranged from 0 to 430,000 ppm

· Average carbon dioxide concentration was 11,733 ppm

· Hydrogen sulfide was not detected in any of the boreholes at 10 inches

20-inch depth statistics:

· Soil temperatures ranged from 20.7 to 48.8 degrees Celsius

· The average soil temperature was 33.0 degrees Celsius

· Carbon dioxide concentrations ranged from 0 to over 600,000 ppm (exceeded the maximum reading range of the equipment)

· Average carbon dioxide concentration was 45,787 ppm

· Hydrogen sulfide was detected in Borings A3 at 0.9 ppm, AA4 at 17.4 ppm, P20 at

36.5 ppm, and Q19 at 45.6 ppm.

30-inch depth statistics:

· Soil temperatures ranged from 24.2 to 49.2 degrees Celsius

· The average soil temperature was 36.7 degrees Celsius

· Carbon dioxide concentrations ranged from 0 to over 600,000 ppm (exceeded the maximum reading range of the equipment)

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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· Average carbon dioxide concentration was 20,408 ppm

· Hydrogen sulfide was not detected in any of the boreholes at 30 inches

As per the previous investigation conducted by Tetra Tech, similar statistics show that 93 percent of the completed boreholes had carbon dioxide (CO2) concentrations greater than 800 ppm.

Temperatures recorded in-excess of 35 degrees Celsius was approximately 39 percent of the completed boreholes, as compared to 12 percent in 2010. Approximately 60 boreholes had carbon dioxide (CO2) concentrations over 10 percent (100,000 ppm) at the 20-inch depth, as compared to 31 boreholes with concentrations greater than 100,000 ppm in 2010, with 4 of the 2021 concentrations being greater than 600,000 ppm (exceeding the maximum capability of the testing equipment). The crawlspace appeared to be a local hotspot with all recorded temperatures greater than 35 degrees Celsius, an average temperature of 39.4 degrees Celsius for all depths (102.8 degrees Fahrenheit), and the location of the highest temperature recorded for the investigation at 44.7 degrees Celsius (120.5 degrees Fahrenheit).

Based on the data recently acquired, it appears there has been slight increase in temperature and carbon dioxide readings on average. What limitations imposed by the Park Service and thresholds for temperature and gas concentrations that would limit rehabilitation and reconfiguring potential have not been provided to Terracon. Therefore, this data should be used by the Park Service and planners as baseline for the project to move forward based on their criteria.

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ATTACHMENTS

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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PHOTOGRAPHY LOG

CO2 Measuring

Collection Basin in east/northeast corner of crawlspace

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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Looking along north/northwest from south entry to crawlspace

North/northeast interior of crawlspace

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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North side of dorm

View looking west at laundry and parking area

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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Northwest side of dorm

Private utility mapping north/northeast side of dorm prior to advancement of borings

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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Red soil exposure at surface near northwest side of dorm

Gas measurements west side of laundry building

Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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Mosais_UTM.jpg

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FIGURES

Contents:

Site Location Plan – Figure 1 Drill Hole Locations – Figure 2 Carbon Dioxide Concentrations at 10-inch Depth – Figure 3 Carbon Dioxide Concentrations at 20-inch Depth – Figure 4 Temperature Values at 10-inch Depth – Figure 5 Temperature Values at 20-inch Depth – Figure 6 Table 1 – Results of Gas Testing (12 pages)

Note: All attachments are one page unless noted above.

SITE LOCATION – FIGURE 1

YELL 313116 - Rehabilitate and Reconfigure the Laurel Dormitory at Old Faithful ■ Yellowstone National Park, WY July 30, 2021 ■ Terracon Project No. C4215000

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MAP 1 LANDSCAPE

DIAGRAM IS FOR GENERAL LOCATION ONLY, AND IS NOT INTENDED FOR CONSTRUCTION PURPOSES MAP PROVIDED BY MICROSOFT BING MAPS

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(0)(2000) (0)

(50000)

(16000) (12000)

(6000) (0)

(10000) (10000)

(6000) (4000)(24000)(46000)(10000)

(12000) (12000)

(12000)

(22000)(2000)(6000)(6000)(0)(2000) (0)

(10000) (30000)

(18000) (2000)

(0) (6000)

(8000) (10000)(0)(12000)

(20000) (0)

(24000)(0)

(6000)(4000)(2000)(4500)(6000)(2000) (2000)

(18000) (8000)(32000)

(24000)

(8000) (4000)

(6000)

(16000)(8000) (24000)(4000)(10000)(4000)

(6000)

(8000) (6000)

(18000) (12000)

(0) (0)

(2000)

(58000)(12000)(10000)(0)(6000)(6000) (12000)

(10000) (24000)(10000)

(6000)

(0)(0) (2000)

(0) (4000)

(2000) (0)

(6000) (2000)

(20000)(32000) (36000)

(16000)

(0)(8000)(0) (0)

(0)(0)(0) (0)(2000)

(2000) (0)

(0)

(0)(16000) (30000)

(16000) (12000)(2000)

(2000)(6000) (4000)(2000)

(2000)(0) (0)

(2000) (0)

(0) (0)

(0)

(6000) (6000)

(0) (4000)

(8000) (6000)

(12000) (12000)

(6000)(4000)(4000)

(0) (0)

(4000)

(4000) (6000)

(4000)

(2000)(10000) (2000)(4000)(2000)

(4000)(2000) (2000)(4000)

(6000) (4000)(0)

(0) (0)

(6000) (2000)

(0) (0)

(0) (0)(0)

(2000)(0) (0)

(0) (2000)(2000)

(0)(0)

(0)

(0) (0)

(0) (0)

(0)(0) (0)

(0) (0)

(0)(4000) (4000)

(0)

(0)(0) (0)

(0) (0)

(0)(0) (0)(0)(0)

(0)

(0) (0)(0)(0)(0)

(0) (0)

(0)

(0)

(0)

(0)

(0)

(0)

(0)

(0) (0)(0)

(NM)

(2000) (4000)

(0) (0) (0)

(2000) (0)

(2000)

(2000)

(12000)

(30000)

(14000)

(172000)

(16000)

(54000)

(26000)

(24000)

(2000)

JULY 2021

CS3

CS4

CS5

CS6

CS7

CS8

CS9CS10

CS11

CS18CS17

CS16

CS15CS14

CS13CS12

CS21CS19

CS20

CS22

CS23

CS24

CS25

CS26

CS27

CS28

CS29

AA1AA2AA3

AA4

A1 A2A3

A4 A5A6A7

A8 A9

B1

B2 B3B4

B5B6 B7

B8B9 B10B11

B12B13B14B15 B16

B17

C1C2 C3

C4C5C6

C8 C9C10C11

C12C13C14 C15

C16C17C18C19 C20C21

C22C23 C24

C25

D1

D2D3D4 D5

D6 D7D8

D9

D12D13 D14D15

D16 D17

D18 D19D20D21D22

D23 D24D25

D26D27 D28D29D30D31

D32D33

E1 E2E3E4E5E6E7

E8E9 E10

E11E12 E13

E15E16E17 E18

E19 E20E21E22

E23 E24

E25E26E27E28E29 E30E31E32E33E34

F1F2 F3

F4F5F6F7F8

F10

F11F12F13F14 F15F16

F17

G1G2G3G4G5

G7G8 G9

G10G11G12G13

H1H2

H3 H4H5H6H7

H8 H9

I1 I2I4I5I6

I7I8I9 I10

I11I12 I13I14

I15 I16

I17I18I19 I20

I21I22I23

J1J2 J4

J5 J6

J7 J8J9

J10J11 J12J13

J14J15

J16J17J18J19J20J21 J22

K1 K2K3K4

K5K6 K7K8K9K10

K11 K12K13

K15

K16K17 K18K19

K20K21 K22

L1

L2 L3

L4 L5

L6 L7

L8 L9L10L11L12

L13 L14

L15

L16L17L18L19L20L21 L22

M1 M2

M3 M4

M6 M7

M8 M9M10M11

M12 M13

M14M15

M16M17M18M19M20M21 M22

N2 N3N4

N5

N8 N9

N10

N11N12N13N14N15N16 N17

O1 O3

O4 O6

O8 O9

O10

O11O12O13O14O15O16 O17

P1 P2P3

P4

P7P8 P9

P10 P11

P12 P13

P14 P15

P16P18 ELC

P19 ELC

P20

Q1Q2Q3 Q4

Q5Q6Q7 Q8Q9

Q10 Q11

Q15

Q16Q18 Q19

R1 R2R3

R4R5 R6R7

R8R9 R10

R11 R12

R13 R14

R15

S1 S2

S3 S4

S5 S6

S7 S8

S9S10S11

S12 S13

S14

S15 S16

S17

T1T2 T3T4

T5 T6T7

T8T9 T10

T11T12 T13

T14 T15

T16

U1 U2

U3 U4U5

U6U7 U8

U9 U10U11

U12U13

U14

V1 V2

V3 V4

V5V6 V7

V8 V9

V10V11 V12

V13

W2W3 W4

W5 W6

W7 W8

W9W10W11 W12

X3 X4X5X6X7

X8 X9

(10000)(6000)(6000) (4000)

(8000) (8000)(42000)

(60000) (12000)(18000)(46000)

(4000) (20000)

(66000)

(8000) (10000)(38000)

(62000)(58000) (56000)

(26000)(18000)

(NM)(12000)

(72000)(42000)(20000)(14000) (90000)

(32000)

(22000)(86000) (44000)

(66000)(> 600K)(> 600K)

(8000) (8000)(34000)(68000)

(12000)(0)(16000) (38000)

(40000)(34000)(114000)(10000) (143000)(62000)

(38000)(16000) (46000)

(40000)

(16000)

(22000)(32000)(20000) (28000)

(26000) (108000)(12000)

(16000)

(16000)(106000) (86000)(4000)

(4000) (94000)

(174000) (6000)(4000)(12000)(4000)

(28000) (26000)(84000)

(62000)(106000) (70000)(96000)(260000)(200000)

(42000)(26000)

(38000) (14000)(28000)

(30000)(16000)(8000)(0) (4000)(over 600K)

(14000) (8000)(32000)

(118000)

(2000)(4000)(2000) (2000)

(2000) (0)(22000)(12000)

(42000) (30000)

(70000)(86000)()(100000)(236000) (24000)(158000)(136000)(96000)(4000)

(10000)(10000) (6000)

(12000)(32000)(396000)(66000)(391000)

(6000)

(36000)(74000)(24000)(220000) (212000)(120000)

(16000)

(32000)(480000)(8000)(44000)(66000)

(106000)(104000) (100000)

(NM)(NM)(NM)(36000)

(12000)(60000)

(22000)

(82000)(56000)(64000)(NM)

(NM) (NM)

(NM)

(12000)(6000)(16000)(20000)

(22000)(36000)(26000) (24000)

(8000)(28000) (20000)(68000)

(38000) (24000)

(12000)(24000)(136000) (36000)

(28000)(NM)(26000)

(20000)(24000) (32000)

(48000) (40000)

(52000) (18000)(40000)

(112000)(104000) (20000)(12000)

(94000)(NA)

(26000)(14000)(14000)(12000)(NM)(NM)

(NM)

(310000) (40000)(84000)(32000)

(118000)(6000) (94000)(174000)(232000)(over 600K)

(72000) (414000)(418000)

(172000)

(32000)(24000) (84000)(26000)

(NM)(NM)

(NM)

(318000)

(22000) (36000)

(26000) (14500)

(68000) (70000)

(88000) (234000)(392000)(142000)(52000)

(194000) (234000)

(50000)

(46000)(18000)(26000)(36000)(24000)(20000) (16000)

(288000) (166000)

(104000) (52000)

(0) (10000)

(20000) (80000)(123000)(108000)

(26000)

(NM)

(160000)(62000)

(54000)(36000)(22000)(90000)(38000)(22000) (38000)

(304000) (270000)(200000)

(68000)

(36000) (18000)

(56000)

(44000)(76000)

(160000)(NM)(54000)(12000)

(62000)

(4000) (37000)

(22000) (204000)

(30000) (12000)

(8000)

(26000)(116000)(40000)(22000)(20000)(30000) (30000)

(162000) (114000)(6000)

(6000)

(2000)(0) (0)

(12000) (4000)

(0) (4000)

(18000) (0)

(104000)(34000) (128000)

(24000)

(82000)(14000)(42000) (12000)

(0)(0)(2000) (2000)(2000)

(2000) (4000)

(10000)

(0)(50000) (46000)

(50000) (22000)(8000)

(2000)(4000) (6000)(0)

(2000)(2000) (0)

(2000) (8000)

(2000) (14000)

(4000)

(36000) (34000)

(20000) (10000)

(12000) (12000)

(18000) (8000)

(6000)(8000)(8000)

(0) (4000)

(4000)

(6000) (6000)

(22000)

(4000)(14000) (12000)(14000)(8000)

(6000)(8000) (4000)(8000)

(10000) (8000)(6000)

(2000) (0)

(8000) (4000)

(12000) (6000)

(6000) (6000)(6000)

(6000)(6000) (4000)

(6000) (4000)(4000)

(40000)(0)

(2000)

(6000) (0)

(4000) (6000)

(2000)(2000) (4000)

(6000) (4000)

(0)(10000) (6000)

(2000)

(0)(4000) (4000)

(0) (2000)

(6000)(6000) (6000)(4000)(0)

(8000)

(2000) (0)(4000)(6000)(0)

(6000) (18000)

(0)

(0)

(0)

(0)

(0)

(0)

(0)

(4000) (2000)(0)

(NM)

(6000) (18000) (2000) (6000) (4000)

(6000) (2000)

(14000)

(4000)

(12000)

(18000)

(68000)

(158000)

(140000)

(14000)

(66000)

(76000)

(12000)

JULY 2021

CS3

CS4

CS5

CS6

CS7

CS8

CS9CS10

CS11

CS18CS17

CS16

CS15CS14

CS13CS12

CS21CS19

CS20

CS22

CS23

CS24

CS25

CS26

CS27

CS28

CS29

AA1AA2AA3

AA4

A1 A2A3

A4 A5A6A7

A8 A9

B1

B2 B3B4

B5B6 B7

B8B9 B10B11

B12B13B14B15 B16

B17

C1C2 C3

C4C5C6

C8 C9C10C11

C12C13C14 C15

C16C17C18C19 C20C21

C22C23 C24

C25

D1

D2D3D4 D5

D6 D7D8

D9

D12D13 D14D15

D16 D17

D18 D19D20D21D22

D23 D24D25

D26D27 D28D29D30D31

D32D33

E1 E2E3E4E5E6E7

E8E9 E10

E11E12 E13

E15E16E17 E18

E19 E20E21E22

E23 E24

E25E26E27E28E29 E30E31E32E33E34

F1F2 F3

F4F5F6F7F8

F10

F11F12F13F14 F15F16

F17

G1G2G3G4G5

G7G8 G9

G10G11G12G13

H1H2

H3 H4H5H6H7

H8 H9

I1 I2I4I5I6

I7I8I9 I10

I11I12 I13I14

I15 I16

I17I18I19 I20

I21I22I23

J1J2 J4

J5 J6

J7 J8J9

J10J11 J12J13

J14J15

J16J17J18J19J20J21 J22

K1 K2K3K4

K5K6 K7K8K9K10

K11 K12K13

K15

K16K17 K18K19

K20K21 K22

L1

L2 L3

L4 L5

L6 L7

L8 L9L10L11L12

L13 L14

L15

L16L17L18L19L20L21 L22

M1 M2

M3 M4

M6 M7

M8 M9M10M11

M12 M13

M14M15

M16M17M18M19M20M21 M22

N2 N3N4

N5

N8 N9

N10

N11N12N13N14N15N16 N17

O1 O3

O4 O6

O8 O9

O10

O11O12O13O14O15O16 O17

P1 P2P3

P4

P7P8 P9

P10 P11

P12 P13

P14 P15

P16P18 ELC

P19 ELC

P20

Q1Q2Q3 Q4

Q5Q6Q7 Q8Q9

Q10 Q11

Q15

Q16Q18 Q19

R1 R2R3

R4R5 R6R7

R8R9 R10

R11 R12

R13 R14

R15

S1 S2

S3 S4

S5 S6

S7 S8

S9S10S11

S12 S13

S14

S15 S16

S17

T1T2 T3T4

T5 T6T7

T8T9 T10

T11T12 T13

T14 T15

T16

U1 U2

U3 U4U5

U6U7 U8

U9 U10U11

U12U13

U14

V1 V2

V3 V4

V5V6 V7

V8 V9

V10V11 V12

V13

W2W3 W4

W5 W6

W7 W8

W9W10W11 W12

X3 X4X5X6X7

X8 X9

(23.8)(27.2)(24.1) (18.6)

(25.7) (25.8)(25.8)

(26) (25.6)(21.3)(20.6)

(21.3) (21.4)

(26.9)

(24) (24.4)(26.3)

(26.7)(30) (26.4)

(27.4)(24.7) (22.7)(23.2)

(24.8)(23.6)(22.6)(22.2) (23.5)

(23.7)

(28.2)(28.6) (29.6)

(29.3)(28.7)(28.6)

(25.4) (24.6)(27.1)(28.4)

(26.9)(27.5)(27.2) (26)

(22.6)(23.5)(22.3)(26.8) (23.6)(25.4)

(25.2)(25.1) (26.8)

(26.7)

(30.9)

(31.9)(32.6)(33.6) (33.1)

(31.6) (29.3)(28.1)

(27.8)

(29.7)(30.1) (30.3)(22.5)

(26.1) (25.7)

(25.7) (27.9)(26.7)(26.4)(25.5)

(21.9) (21.3)(23.1)

(23.7)(25.5) (24.1)(23.8)(23.2)(29.1)

(26.9)(29.7)

(32.3) (31.7)(32)

(32.9)(32.9)(32.2)(30.7) (27.2)(26.6)

(28.3) (28.9)(31.4)

(30.6)

(28.3)(27.6)(26.8) (27.1)

(29.2) (30.3)(24.6)(24.4)

(24.8) (25.2)

(24.5)(24.2)(24.1)(25.1)(24.7) (25.2)(26.2)(26.8)(27.7)(28.4)

(27.4)(28) (27.3)

(26.1)(26.8)(27.9)(28)(27.4)

(26.3)

(24.9)(23.6)(22.7)(24.1) (23.3)(24.4)

(25.9)

(30.1)(29.3)(29.3)(26.9)(26.9)

(25.4)(24.3) (23.9)

(24.4)(23.9)(23.6)(24)

(30.8)(30.4)

(26) (24.7)(23.6)(23.2)(23.1)

(23.4) (25.1)

(27.4) (28.9)(26.1)(24.2)(23.6)

(23.2)(23.6)(23.9) (22.7)

(23.9)(24.8) (23.6)(23.5)

(25.2) (22.3)

(29.9)(25.1)(25.1)(24.6) (23.9)(25.7)(26.9)

(28.7)(31.9) (24.8)

(24.6) (24.4)

(25.8) (25.6)(25.7)

(25.7)(24.7) (26.1)(26.4)

(25.9)(23.2)

(25.5)(24.8)(28.5)(23)(22.7)(27.5) (26.3)

(31.2) (30.6)(32.7)(32.9)

(32.3)(33.5) (32.6)(32.4)(32)(32.1)

(31.9) (32.1)(25.4)

(32.8)

(27.1)(27.4) (29.2)(28.8)

(25.9)(25.7) (26.8)

(34.4)

(33.7) (34.6)

(33.8) (23.1)

(20.6) (23.3)

(20) (19.5)(20.1)(18.9)(19.2)

(20.4) (21.6)

(21.1)

(29.9)(27.5)(29.6)(33.1)(33.1)(29.6) (27.7)

(23.5) (23.3)

(23.4) (25)

(24.8) (24.4)

(24) (23.6)(24.2)(23.3)

(26.1) (26.7)

(26.4)(26.6)

(26.8)(28.5)(31.6)(29.9)(35)(32.2) (29.2)

(36.5) (37.4)(37.9)

(34.3)

(36.5) (35.4)

(32.1)

(27.9)(29.6) (32.5)(30.7)(30.6)(35.8)

(31)

(28.2) (28.3)

(25.8) (24.8)

(19.2) (22.4)

(22.5)

(32.3)(33.1)(34.2)(36.2)(34.1)(33.9) (29.6)

(27.4) (26.1)(25.3)

(25.2)

(23.3)(23.3) (23.4)

(23.3) (21.6)

(21.1) (22.1)

(25.9) (25.7)

(31)(35.7) (37.6)

(36.7)

(30.9)(28.8)(32.9) (28.9)

(28.3)(27.7)(26.8) (26.5)(25.9)

(25.7) (25.4)

(31.2)

(24.2)(32) (31.7)

(33.8) (33)(33.4)

(34.3)(34.7) (34.6)(36.7)

(35.8)(35.8) (35)

(35.4) (34.4)

(29.4) (32.6)

(40)

(33.3) (34)

(33.1) (40.3)

(39.7) (39.8)

(41.2) (41.1)

(40.8)(40.1)(39.8)

(36.8) (33.3)

(32.3)

(38.6) (38.9)

(35.6)

(29.4)(29.1) (25.5)(28)(28.4)

(27.2)(27.2) (28.8)(28.4)

(28.5) (28)(26.2)

(30.3) (26.3)

(27.2) (25.1)

(29.4) (27.7)

(29.4) (29.8)(28.6)

(28.3)(28.4) (28.5)

(28.3) (28.3)(28.5)

(27.9)(24.8)

(25.9)

(30.7) (28.4)

(27.3) (30.6)

(31.2)(31.9) (32.8)

(32.6) (32.6)

(32.4)(32.6) (31.5)

(27.2)

(26.2)(28.2) (30.1)

(29.6) (29.4)

(29.9)(31.1) (30.6)(29.3)(28.9)

(28.9)

(32.2) (31.1)(31.7)(32.1)(31.7)

(31.1) (30.4)

(32.44444444)

(29.5)

(32)

(31.77777778)

(37.5)

(37.38888889)

(35.38888889)

(37.38888889) (36.66666667)(36.77777778)

(NM)

(28.83333333)(29.33333333) (30.22222222)(30.72222222)(31.16666667)

(31.94444444) (33.22222222)

(28.55555556)

(33.16666667)

(28.16666667)

(24.83333333)

(30.38888889)

(32.33333333)

(32.33333333)

(30.27777778)

(30.44444444)

(30.55555556)

(31.11111111)

JULY 2021

CS3

CS4

CS5

CS6

CS7

CS8

CS9CS10

CS11

CS18CS17

CS16

CS15CS14

CS13CS12

CS21CS19

CS20

CS22

CS23

CS24

CS25

CS26

CS27

CS28

CS29

AA1AA2AA3

AA4

A1 A2A3

A4 A5A6A7

A8 A9

B1

B2 B3B4

B5B6 B7

B8B9 B10B11

B12B13B14B15 B16

B17

C1C2 C3

C4C5C6

C8 C9C10C11

C12C13C14 C15

C16C17C18C19 C20C21

C22C23 C24

C25

D1

D2D3D4 D5

D6 D7D8

D9

D12D13 D14D15

D16 D17

D18 D19D20D21D22

D23 D24D25

D26D27 D28D29D30D31

D32D33

E1 E2E3E4E5E6E7

E8E9 E10

E11E12 E13

E15E16E17 E18

E19 E20E21E22

E23 E24

E25E26E27E28E29 E30E31E32E33E34

F1F2 F3

F4F5F6F7F8

F10

F11F12F13F14 F15F16

F17

G1G2G3G4G5

G7G8 G9

G10G11G12G13

H1H2

H3 H4H5H6H7

H8 H9

I1 I2I4I5I6

I7I8I9 I10

I11I12 I13I14

I15 I16

I17I18I19 I20

I21I22I23

J1J2 J4

J5 J6

J7 J8J9

J10J11 J12J13

J14J15

J16J17J18J19J20J21 J22

K1 K2K3K4

K5K6 K7K8K9K10

K11 K12K13

K15

K16K17 K18K19

K20K21 K22

L1

L2 L3

L4 L5

L6 L7

L8 L9L10L11L12

L13 L14

L15

L16L17L18L19L20L21 L22

M1 M2

M3 M4

M6 M7

M8 M9M10M11

M12 M13

M14M15

M16M17M18M19M20M21 M22

N2 N3N4

N5

N8 N9

N10

N11N12N13N14N15N16 N17

O1 O3

O4 O6

O8 O9

O10

O11O12O13O14O15O16 O17

P1 P2P3

P4

P7P8 P9

P10 P11

P12 P13

P14 P15

P16P18 ELC

P19 ELC

P20

Q1Q2Q3 Q4

Q5Q6Q7 Q8Q9

Q10 Q11

Q15

Q16Q18 Q19

R1 R2R3

R4R5 R6R7

R8R9 R10

R11 R12

R13 R14

R15

S1 S2

S3 S4

S5 S6

S7 S8

S9S10S11

S12 S13

S14

S15 S16

S17

T1T2 T3T4

T5 T6T7

T8T9 T10

T11T12 T13

T14 T15

T16

U1 U2

U3 U4U5

U6U7 U8

U9 U10U11

U12U13

U14

V1 V2

V3 V4

V5V6 V7

V8 V9

V10V11 V12

V13

W2W3 W4

W5 W6

W7 W8

W9W10W11 W12

X3 X4X5X6X7

X8 X9

(24.4)(24.7)(24.2) (20.7)

(25.6) (24.1)(25.3)

(25.7) (25.4)(25)(22.6)

(23.8) (24.2)

(33.3)

(23.6) (23.6)(25)

(26.3)(25.8) (25.7)

(26.3)(26)

(NM)(25.5)

(25.9)(25.5)(24.8)(26.3) (26.9)

(31.3)

(26.5)(28.2) (29.6)

(36.4)(37)(38.3)

(24.2) (23.2)(24.4)(24.9)

(25.5)(26.4)(28.7) (26.8)

(25.7)(25.6)(26.2)(26.8) (27.1)(26.2)

(27.1)(27.6) (31.4)

(33.5)

(31.2)

(32.7)(34.4)(36.9) (38.4)

(39) (34.5)(31.2)

(29.8)

(29.9)(30.8) (29.7)(26.4)

(25.7) (26.3)

(26.6) (27.7)(27.6)(28.1)(25.8)

(23.8) (24.1)(26.3)

(25.5)(25) (23.9)(23.4)(24.5)(28.1)

(28.4)(31.2)

(33.3) (34.3)(36.7)

(39.1)(37.5)(35.1)(35.4) (32.3)(31.2)

(33.5) (33.4)(32.8)

(32.4)

(28.7)(29.3)(28.3) (29.1)

(29.6) (31.8)(25.5)(25.4)

(26.9) (25.9)

(24.7)(23.9)(NM)(30.1)(27.9)

(27.3)(29.6)(28.8)(28.6)(28.8)

(36.4)(35.1) (32.4)

(35.4)(35.2)(34.6)(33.7)(33.3)

(30.9)

(28)(26.5)(27.2)(27.6) (26.6)(26.9)

(27.6)

(33.9)(35.3)(34.6)(32.7)(32.1)

(26.8)(24.9) (26.9)

(NM)(NM)(NM)(29.1)

(39.4)(34.6)

(30.8)

(27.7)(27.6)(27.5)(NM)

(NM) (NM)

(NM)

(32.6)(32.4)(30.9)(31.4)

(32)(32)(31.4) (31.2)

(31.1)(32.1) (31.7)(32.2)

(32.6) (30.9)

(34.6)(30.9)(29.4)(29.3) (28.6)()(29.7)

(36.8)(34.8) (33.3)

(32.1) (31.8)

(32.5) (31.7)(31.6)

(32.7)(32.1) (31.9)(31.3)

(31.6)(30.3)

(36.9)(33.7)(37.3)(32.3)(NM)(NM)

(NM)

(37.7) (34.8)(33.5)(33.4)

(33.4)(34.7) (34.7)(32.7)(32.7)(32.2)

(30.9) (30)(30.3)

(30.2)

(38.5)(37) (38.9)(36.7)

(NM)(NM)

(NM)

(36.4)

(35.7) (36.2)

(37.1) (34.2)

(36.1) (36.8)

(35.3) (33.6)(32.4)(30.1)(29.4)

(30.6) (33.2)

(33.9)

(40.3)(39.2)(41.9)(43.4)(40.8)(35.4) (33.2)

(34.4) (37.9)

(37.9) (37.5)

(37) (38.7)

(36.7) (33.4)(35.2)(30.2)

(29.9)

(NM)

(32.1)(28.3)

(39.8)(40.6)(40.5)(40.8)(43.8)(37.3) (35.2)

(38.4) (38.8)(40.1)

(36.8)

(31.7) (31.9)

(32.3)

(41.4)(42.5)

(40.9)(NM)(38.7)(42.1)

(38.3)

(39) (37.1)

(37.3) (32.7)

(29.9) (33.4)

(31)

(40.1)(42.2)(39.1)(41.6)(42.7)(40.7) (39.8)

(39.4) (38.3)(34.3)

(34.1)

(31.3)(32.9) (33.8)

(32.6) (29.4)

(27.3) (28.6)

(33.8) (34.4)

(37.1)(43.9) (43.7)

(41.4)

(36.4)(35.6)(33.9) (34.4)

(30.8)(31.4)(29.8) (31.3)(29.4)

(30) (28.6)

(35.3)

(31.8)(35.7) (37.3)

(35.6) (33.8)(33.6)

(34.1)(32.6) (32.4)(32.9)

(32.6)(36.2) (32.1)

(31.2) (31.9)

(31.6) (29.7)

(NA)

(34.3) (33.6)

(33.8) (34.5)

(33.6) (34.1)

(34.6) (34.3)

(34.5)(34.1)(34.6)

(32.5) (32.2)

(33.2)

(38.4) (39)

(37.4)

(36.9)(36.2) (35.1)(35)(35.5)

(34.4)(34.5) (35.6)(35.8)

(35.9) (35.7)(34.9)

(35.7) (35.2)

(37.2) (39.2)

(35.8) (35.7)

(35.2) (35.2)(35.4)

(35.1)(35.3) (35.9)

(35.7) (35.8)(35.6)

(34.4)(32.5)

(32.3)

(33.3) (32.3)

(34.7) (35.3)

(34.4)(34.9) (35.8)

(35.2) (34.7)

(34.4)(33.5) (32.6)

(27.9)

(30.3)(32.1) (34.3)

(34.7) (35.1)

(35.6)(35.2) (35.5)(31.8)(30.5)

(29.8)

(31.1) (32.3)(32.9)(35)(34.7)

(34.8) (32.4)

(39.78)

(35.22)

(38.89)

(40)

(44.56)

(43.78)

(44.11)

(44.67) (45.5)(41.94)

(N)

(35.11) (36.61) (37.94) (38.06) (36.78)

(38.22) (38.17)

(37.94)

(40.17)

(36.28)

(39.33)

(41.11)

(45.94)

(48.83)

(44.56)

(43.78)

(42.72)

(41.17)

JULY 2021

Table 1 Results of Gas Testing

Laurel Dormitory June 2021

CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC

AA1 0.2 2000 0 23.8 1 10000 0 24.4

AA2 0.2 2000 0 27.2 0.6 6000 0 24.7 0.6 6000 0 caved

AA3 0.6 6000 0 24.1 0.6 6000 0 24.2

AA4 0.2 2000 0 18.6 0.4 4000 17.4 20.7

A1 0.2 2000 0 25.7 0.8 8000 0 25.6

A2 0.6 6000 0 25.8 0.8 8000 0 24.1

A3 1.8 18000 0 25.8 4.2 42000 0.9 25.3 2.3 23000 0 26.1

A4 2.4 24000 0 26.0 6 60000 0 25.7

A5 1 10000 0 25.6 1.2 12000 0 25.4 1.2 12000 0 27.9

A6 0.2 2000 0 21.3 1.8 18000 0 25.0

A7 0.6 6000 0 20.6 4.6 46000 0 22.6 0.8 8000 0 24.2

A8 0.2 2000 0 21.3 0.4 4000 0 23.8

A9 0.6 6000 0 21.4 2 20000 0 24.2

B1 1.2 12000 0 26.9 6.6 66000 0 33.3

B2 0.8 8000 0 24.0 0.8 8000 0 23.6

B3 1 10000 0 24.4 1 10000 0 23.6

B4 1.6 16000 0 26.3 3.8 38000 0 25.0

B5 5.4 54000 0 26.7 6.2 62000 0 26.3

B6 2 20000 0 30.0 5.8 58000 0 25.8

B7 2.6 26000 0 26.4 5.6 56000 0 25.7

B8 3.8 38000 0 27.4 2.6 26000 0 26.3

B9 0.6 6000 0 24.7 1.8 18000 0 26.0 1.4 14000 0 28.2

B10 0.2 2000 0 22.7

B11 0 0 0 23.2 1.2 12000 0 25.5 8 80000 0 27.4

B12 1 10000 0 24.8 7.2 72000 0 25.9 11.2 112000 0 27.2

B13 2.6 26000 0 23.6 4.2 42000 0 25.5

B14 0.6 6000 0 22.6 2 20000 0 24.8

B15 0.4 4000 0 22.2 1.4 14000 0 26.3

B16 1.8 18000 0 23.5 9 90000 0 26.9

B17 0.6 6000 0 23.7 3.2 32000 0 31.3

C1 1.6 16000 0 28.2 2.2 22000 0 26.5

C2 6.2 62000 0 28.6 8.6 86000 0 28.2

C3 3.4 34000 0 29.6 4.4 44000 0 29.6

C4 2.2 22000 0 29.3 6.6 66000 0 36.4

C5 32 320000 0 28.7 over 600K 0 37.0

C6 43 430000 0 28.6 over 600K 0 38.3

C7

C8 0.6 6000 0 25.4 0.8 8000 0 24.2

C9 1 10000 0 24.6 0.8 8000 0 23.2

C10 1.2 12000 0 27.1 3.4 34000 0 24.4

C11 3 30000 0 28.4 6.8 68000 0 24.9

C12 1.4 14000 0 26.9 1.2 12000 0 25.5

C13 0.8 8000 0 27.5 0.8 0 0 26.4 obstruction (rock/utility) eliminated - located in wetland

10 inch Depth 20 inch Depth 30 inch DepthHole ID red/brown clay red/brown clay lt red brown clay red/brown clay brown clay brown clay caved red clay lt red brown clay red/brown clay red/brown clay red/brown clay red/brown clay red/brown clay lt red brown clay brown clay white clay lt brown clay brown clay red clay red/brown clay brown clay dark gray clay lt red brown clay light gray clay red clay red clay brown clay lt brown clay lt red brown clay brown clay brown clay red clay red clay

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Laurel Dormitory June 2021

CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC

10 inch Depth 20 inch Depth 30 inch DepthHole ID

C14 0.6 6000 0 27.2 1.6 16000 0 28.7

C15 2 20000 0 26.0 3.8 38000 0 26.8

C16 0.6 6000 0 22.6 4 40000 0 25.7

C17 1.4 14000 0 23.5 3.4 34000 0 25.6

C18 1.2 12000 0 22.3 11.4 114000 0 26.2

C19 7 70000 0 26.8 1 10000 0 26.8

C20 11.4 114000 0 23.6 14.3 143000 0 27.1

C21 1.2 12000 0 25.4 6.2 62000 0 26.2

C22 0.8 8000 0 25.2 3.8 38000 0 27.1

C23 3.8 38000 0 25.1 1.6 16000 0 27.6

C24 1.6 16000 0 26.8 4.6 46000 0 31.4

C25 0.1 1000 0 26.7 4 40000 0 33.5

D1 0.6 6000 0 30.9 1.6 16000 0 31.2

D2 0.6 6000 0 31.9 2.2 22000 0 32.7

D3 1.6 16000 0 32.6 3.2 32000 0 34.4

D4 1 10000 0 33.6 2 20000 0 36.9

D5 0.6 6000 0 33.1 2.8 28000 0 38.4

D6 0.8 8000 0 31.6 2.6 26000 0 39.0

D7 0.8 8000 0 29.3 10.8 108000 0 34.5

D8 0.6 6000 0 28.1 1.2 12000 0 31.2

D9 0 0 0 27.8 1.6 16000 0 29.8

D10

D11

D12 0.8 8000 0 29.7 1.6 16000 0 29.9

D13 0.4 4000 0 30.1 10.6 106000 0 30.8 2 20000 0 30.8

D14 1.2 12000 0 30.3 8.6 86000 0 29.7 2 20000 0 30.3

D15 0.6 6000 0 22.5 0.4 4000 0 26.4 1 10000 0 28.9

D16 0.4 4000 0 26.1 0.4 4000 0 25.7

D17 2.2 22000 0 25.7 9.4 94000 0 26.3

D18 1.6 16000 0 25.7 17.4 174000 0 26.6

D19 0 0 0 27.9 0.6 6000 0 27.7 0.2 2000 0 28.3

D20 0 0 0 26.7 0.4 4000 0 27.6 0.6 6000 0 27.6

D21 0.2 2000 0 26.4 1.2 12000 0 28.1

D22 0.4 4000 0 25.5 0.4 4000 0 25.8

D23 0.4 4000 0 21.9 2.8 28000 0 23.8

D24 0.2 2000 0 21.3 2.6 26000 0 24.1

D25 0.2 2000 0 23.1 8.4 84000 0 26.3

D26 0.6 6000 0 23.7 6.2 62000 0 25.5

D27 0.3 3000 0 25.5 10.6 106000 0 25.0

D28 1.4 14000 0 24.1 7 70000 0 23.9

D29 1.2 12000 0 23.8 9.6 96000 0 23.4

D30 10 100000 0 23.2 26 260000 0 24.5

D31 12.8 128000 0 29.1 20 200000 0 28.1 eliminated - located in wetland eliminated - located in wetland red clay lt brown clay white clay red clay lt brown clay red/brown clay lt gray clay lt red orange clay lt brown clay lt brown clay red clay lt brown clay white clay red clay red clay red/brown clay white clay pink clay white clay white clay light pink clay light red clay pink clay pink clay gray clay pink clay red clay light red clay lt brown clay white clay red/brown clay light red clay brown clay/wet lt brown clay lt brown clay brown clay

N:\Projects\2021\C4215000\Working Files\Diagrams-Drawings-Figures\Summary Data Sheet_final.xlsx Page 2 of 12

Laurel Dormitory June 2021

CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC

10 inch Depth 20 inch Depth 30 inch DepthHole ID

D32 4.4 44000 0 26.9 4.2 42000 0 28.4

D33 0.6 6000 0 29.7 2.6 26000 0 31.2

E1 0.8 8000 0 32.3 3.8 38000 0 33.3

E2 1.2 12000 0 31.7 1.4 14000 0 34.3

E3 0.4 4000 0 32.0 2.8 28000 0 36.7

E4 0.8 8000 0 32.9 3 30000 0 39.1

E5 0.2 2000 0 32.9 1.6 16000 0 37.5

E6 0 0 0 32.2 0.8 8000 0 35.1

E7 0 0 0 30.7 0 0 0 35.4

E8 0 0 0 27.2 0.4 4000 0 32.3

E9 7.8 78000 0 26.6 over 600K 0 31.2

E10 2.6 26000 0 28.3 1.4 14000 0 33.5

E11 0.6 6000 0 28.9 0.8 8000 0 33.4

E12 3 30000 0 31.4 3.2 32000 0 32.8

E13 4.6 46000 0 30.6 11.8 118000 0 32.4

E14 0 0 0 28.1 0.4 4000 0 30.4 0.4 4000 0 29.5

E-15 0 0 0 28.3 0.2 2000 0 28.7 0.4 4000 0 29.8

E16 0 0 0 27.6 0.4 4000 0 29.3 0.4 4000 0 31.8

E17 0 0 0 26.8 0.2 2000 0 28.3 0.4 4000 0 31.7

E18 0 0 0 27.1 0.2 2000 0 29.1 0.2 2000 0 32.2

E19 0 0 0 29.2 0.2 2000 0 29.6

E20 0 0 0 30.3 0 0 0 31.8

E21 0.2 2000 0 24.6 2.2 22000 0 25.5

E22 0.4 4000 0 24.4 1.2 12000 0 25.4

E23 1.6 16000 0 24.8 4.2 42000 0 26.9

E24 0.6 6000 0 25.2 3 30000 0 25.9

E25 1.6 16000 0 24.5 7 70000 0 24.7

E26 1 10000 0 24.2 8.6 86000 0 23.9

E27 0.6 6000 0 24.1

E28 0 0 0 25.1 10 100000 0 30.1

E29 0.2 2000 0 24.7 23.6 236000 0 27.9

E30 0.6 6000 0 25.2 2.4 24000 0 27.3

E31 10 100000 0 26.2 15.8 158000 0 29.6

E32 0 0 0 26.8 13.6 136000 0 28.8

E33 0 0 0 27.7 9.6 96000 0 28.6

E34 0 0 0 28.4 0.4 4000 0 28.8

F1 1 10000 0 27.4 1 10000 0 36.4

F2 1.2 12000 0 28.0 1 10000 0 35.1

F3 0.6 6000 0 27.3 0.6 6000 0 32.4

F4 0 0 0 26.1 1.2 12000 0 35.4

F5 2.4 24000 0 26.8 3.2 32000 0 35.2

F6 2.2 22000 0 27.9 39.6 396000 0 34.6

F7 1.4 14000 0 28.0 6.6 66000 0 33.7 refusal red clay lt red clay gray clayey sand lt red/brown clay brown clayey sand orange clay red/brown clay orange/brown clay lt brown clay lt brown clay white clay lt gray clay lt brown clay white clay orange clay white clay white clay red clay red/brown clay brown clay lt gray clay lt brown clay red/brown clay lt gray clay pinkish gray clay lt orange clay red clay pinkish gray clay lt gray clay lt gray clay orange/gray clay orange clay red clay red/brown clay gray clayey sand lt red/brown clay (wet) lt red clay

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Laurel Dormitory June 2021

CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC

10 inch Depth 20 inch Depth 30 inch DepthHole ID

F8 5.6 56000 0 27.4 39.1 391000 0 33.3

F9

F10 0.6 6000 0 26.3 0.6 6000 0 30.9 0.6 6000

F11 0 0 0 24.9 3.6 36000 0 28.0

F12 0.6 6000 0 23.6 7.4 74000 0 26.5

F13 0.6 6000 0 22.7 2.4 24000 0 27.2

F14 3.4 34000 0 24.1 22 220000 0 27.6

F15 2 20000 0 23.3 21.2 212000 0 26.6

F16 1.6 16000 0 24.4 12 120000 0 26.9

F17 0 0 0 25.9 1.6 16000 0 27.6

G1 1.6 16000 0 30.1 3.2 32000 0 33.9

G2 3.4 34000 0 29.3 48 480000 0 35.3

G3 0.8 8000 0 29.3 0.8 8000 0 34.6

G4 1.2 12000 0 26.9 4.4 44000 0 32.7

G5 7.8 78000 0 26.9 6.6 66000 0 32.1 24.6 246000 0 33.2

G6

G7 0.2 2000 0 25.4 10.6 106000 0 26.8

G8 1.2 12000 0 24.3 10.4 104000 0 24.9

G9 0.2 2000 0 23.9 10 100000 0 26.9

G10 0.2 2000 0 24.4

G11 0.4 4000 0 23.9

G12 1.8 18000 0 23.6

G13 0 0 0 24.0 3.6 36000 0 29.1

H1 1.2 12000 0 30.8 1.2 12000 0 39.4

H2 4.4 44000 0 30.4 6 60000 0 34.6

H3 0 0 0 26 2.2 22000 0 30.8

H4 0.4 4000 0 24.7 8.2 82000 0 27.7

H5 0 0 0 23.6 5.6 56000 0 27.6

H6 0 0 0 23.2 6.4 64000 0 27.5

H7 0 0 0 23.1

H8 1 10000 0 23.4

H9 0.2 2000 0 25.1

I1 0.6 6000 0 27.4

I2 0.4 4000 0 28.9 1.2 12000 0 32.6

I3

I4 2 20000 0 26.1 0.6 6000 0 32.4

I5 0.4 4000 0 24.2 1.6 16000 0 30.9

I6 0 0 0 23.6 2 20000 0 31.4

I7 0.2 2000 0 23.2 2.2 22000 0 32.0

I8 0.2 2000 0 23.6 3.6 36000 0 32.0

I9 0.4 4000 0 23.9 2.6 26000 0 31.4

I10 0.4 4000 0 22.7 2.4 24000 0 31.2

I11 0 0 0 23.9 0.8 8000 0 31.1 terminated at 20" in clay, didn't record color eliminated - unknown utility red/brown clay red clay red clay red clay red/brown clay

Utility conflict/stopped at 10" eliminted - utility red clay red/brown clay lt gray/brown clay lt brown clay eliminated - utility orange/purple clay lt yellow clay lt yellow clay red clay lt brown clayey sand brown clayey sand gray clay (wet) brown clay lt brown clay brown clay lt brown/orange clay lt brown clay

Gravel/Fill - caved in lt red/brown clay red/brown clay red/brown clay lt red/brown clay lt brown clay lt purple/brown clay purple clay white clay lt red clay red clay lt brown clay red/brown clay lt brown clay lt red/brown clay lt red/brown clay

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Laurel Dormitory June 2021

CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC CO2 % Vol CO2 ppm H2S ppm Temp oC

10 inch Depth 20 inch Depth 30 inch DepthHole ID

I12 0.4 4000 0 24.8 2.8 28000 0 32.1

I13 0.4 4000 0 23.6 2 20000 0 31.7

I14 0.2 2000 0 23.5 6.8 68000 0 32.2

I15 0.2 2000 0 25.2 3.8 38000 0 32.6

I16 0.2 2000 0 22.3 2.4 24000 0 30.9

I17 0.2 2000 0 29.9 1.2 12000 0 34.6

I18 0.2 2000 0 25.1 2.4 24000 0 30.9

I19 2.8 28000 0 25.1 13.6 136000 0 29.4

I20 0.2 2000 0 24.6 3.6 36000 0 29.3

I21 0 0 0 23.9 2.8 28000 0 28.6

I22 0.2 2000 0 25.7

I23 0.2 2000 0 26.9 2.6 26000 0 29.7

J1 3 30000 0 28.7 2 20000 0 36.8

J2 1 10000 0 31.9 2.4 24000 0 34.8

J3

J4 0.2 2000 0 24.8 3.2 32000 0 33.3

J5 0.6 6000 0 24.6 4.8 48000 0 32.1

J6 0.6 6000 0 24.4 4 40000 0 31.8

J7 0.2 2000 0 25.8 5.2 52000 0 32.5

J8 0.4 4000 0 25.6 1.8 18000 0 31.7

J9 0.2 2000 0 25.7 4 40000 0 31.6

J10 0 0 0 25.7 11.2 112000 0 32.7

J11 3.6 36000 0 24.7 10.4 104000 0 32.1

J12 1.2 12000 0 26.1 2 20000 0 31.9

J13 0.2 2000 0 26.4 1.2 12000 0 31.3

J14 0 0 0 25.9 9.4 94000 0 31.6

J15 0.8 8000 0 23.2 NA 0 30.3

J16 0.8 8000 0 25.5 2.6 26000 0 36.9

J17 0.8 8000 0 24.8 1.4 14000 0 33.7

J18 3.6 36000 0 28.5 1.4 14000 0 37.3

J19 0.2 2000 0 23.0 1.2 12000 0 32.3

J20 0 0 0 22.7

J21 0.4 4000 0 27.5

J22 0.4 4000 0 26.3

K1 6.6 66000 0 31.2 31 310000 0 37.7

K2 2.4 24000 0 30.6 4 40000 0 34.8

K3 0.3 3000 0 32.7 8.4 84000 0 33.5

K4 0 0 0 32.9 3.2 32000 0 33.4

K5 1.4 14000 0 32.3 11.8 118000 0 33.4

K6 4.2 42000 0 33.5 0.6 6000 0 34.7

K7 1.6 16000 0 32.6 9.4 94000 0 34.7

K8 0.8 8000 0 32.4 17.4 174000 0 32.7

K9 1.2 12000 0 32.0 23.2 232000 0 32.7 terminated at 20" in clay, didn't record color red clay red clay red/brown clay terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't record color eliminated - utility terminated at 20" in clay, didn't record color terminated at 20" in clay, didn't…