ML17215A118

Tsd 17-007, Rev. 0 - Evaluation of Static Measurements Performed for Unconditional Release Surveys of Building Material Used for Backfill at Decommissioning Project.

ML17215A118
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	06/22/2017
From:	Darois E ZionSolutions
To:	Office of Nuclear Material Safety and Safeguards
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ML17215A095	List: ML17215A098 ML17215A102 ML17215A109 ML17215A110 ML17215A112 ML17215A113 ML17215A114 ML17215A115 ML17215A117 ML17215A118 ML17215A129 ML17215A130 ML17215A131 ML17215A135 ML17215A136 ML17215A137 ML17215A138 ML17215A139 ML17215A140 ML17215A141 ZS-2017-0084, Restoration Project License Termination Plan Chapter 8, Revision 1 Supplement to the Environmental Report.
References
ZS-2017-0084 TSD 17-007, Rev. 0
Download: ML17215A118 (59)

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Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 ZionSolutions, LLC.

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Technical Support Document ZIONSOLUTIONSw:

An Ene~Compony TSD 17-007 Evaluation of Static Measurements Performed for Unconditional Release Surveys of Building Materials Used for Backfill at the Zion Decommissioning Project Revision 0 PREPARED BY /DATE: Eric L. Darois~ CHP ~ 06/22/17 REVIEWED BY I DATE: Daniel R. Mihalik D~11!.tkM 06/22/17 APPROVED BY I DATE: David Wojtkowiak

~*~--- 06/22/17 Page 1 of59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 1 Executive Summary Between April 2014 and August 2016, unconditional release (a.k.a. free-release) surveys were conducted on multiple buildings to support building demolition and a) the beneficial re-use of concrete as backfill material where no licensed materials were identified and b) the unconditional release of non-concrete materials from the site. The criteria that were applied, as delineated in ZS-LT-400-001-001, Unconditional Release of Material, Equipment and Secondary Structures [1], were based on scan measurements of 87 survey units.

During the execution of the surveys, an average of approximately 9 ambient background measurements were collected for each survey unit with a minimum of one (1) and up to 19, depending on the survey unit. Also, a total of 4,734 static (fixed-point) measurements using a one-minute count time were collected across all survey units with an average of 54 static measurements per survey unit.

Following demolition and backfill, the NRC staff requested additional information [2] as part of the review of Zions License Termination Plan regarding the unconditional release survey data and its comparison to the criteria specified in NUREG-1575, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) [3]). In order to provide this additional information, this evaluation was prepared and will be submitted to NRC for review.

This evaluation provides two determinations for the null hypothesis (Scenario A), a defined discrimination level and Type I and II decision errors as follows:

• Whether the static measurements collected for each survey unit would have passed the Sign test described in MARSSIM, and,

• Whether a sufficient number of static measurements would have been made if MARSSIM had been used as a survey design method.

In order to perform this analysis, the ambient background data was used to determine a unique critical level (Lc) for each survey unit. This critical level was calculated for a type 1 error rate of 5%. In other words, this analysis uses the presumption that there is a 5%

chance that an incorrect conclusion will result (i.e., that a survey unit would be released when it should have failed). We recognize that in our draft RAI response to NRC staff to provide additional information [2], we indicated that our previous response that referred to the use of a critical level was erroneously used in [1] and that in-fact, the critical level was not used as part of the unconditional release acceptance criteria. We also noted that our implementing procedures do not apply the critical level to our evaluations which remains to be the case. However, we have applied the critical level in this evaluation to conservatively demonstrate whether compliance with MARSSIM survey design would have been met. Lastly, our RAI response indicates that we will provide the NRC staff with additional information regarding the scan survey results and evaluation which will be provided as a separate technical support document.

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Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 The analysis shows that all 87 survey units pass the Sign test when using the critical level (Lc) as a surrogate DCGL. In this analysis, two (2) of the survey units contained only one (1) ambient background measurement which prevents the calculation of a standard deviation for these units. Therefore, for these units, the average coefficient of variation for all 758 ambient background measurements was scaled against the measured ambient background value as an estimate of the standard deviation.

The design and implementation of the unconditional release surveys was similar to MARSSIM surveys regarding the use of data quality objectives and data quality assessment processes. Three principal differences between a MARSSIM survey design and our design for the unconditional release surveys were:

• Our survey design generally selected more fixed-measurement locations for each survey unit than what a MARSSIM design would dictate.

• The selection of the fixed-point measurement locations was biased to locations that may have contained licensed materials rather than using a random process whereas a MARSSIM design would be predicated on a random selection process (depending on classification).

• The acceptance criteria was based on the scan results rather than the fixed point measurement results using a discrete acceptance criteria of scan-MDCR plus the background count rate for each survey unit during scanning. In a MARSSIM-designed survey, the scan-MDCR is compared against the DCGLEMC which was not used for unconditional release surveys.

The data clearly shows that the scan measurement data and the static measurement data both meet the unconditional release acceptance criteria that was applied. In other words, all individual measurements (scan and static) were less than the scan-MDCR plus background and that all measurements were less than 5000 dpm/100cm2. This analysis also shows that all static measurements for each survey unit separately would pass the sign test criteria when we conservatively use a DCGL that corresponds to the critical level for each survey unit. Furthermore, this analysis identifies six survey units where the number of static measurements were less than what would have been prescribed by MARSSIM while still passing the Sign test criteria as described above. However, as noted in [2], some of these units would have been combined with other larger adjacent units thereby eliminating this condition had the survey been designed and implemented as MARSSIM surveys.

Lastly, we will apply a very conservative dose for the materials used for backfill where we assume that all surfaces contain residual radioactivity at either 5000 dpm/100cm2 or at the maximum observed value corresponding to the MDCR plus background count rate. The corresponding dose associated with 5000 dpm/100cm2 is 0.7 mrem.

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Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Table of Contents 1 Executive Summary ......................................................................................... 2 2 Introduction..................................................................................................... 5 3 Methods ........................................................................................................... 6 3.1 Available Data ........................................................................................... 6 3.2 Application of the Sign Test .................................................................... 10 4 Results ........................................................................................................... 14 4.1 Sign Test .................................................................................................. 14 4.2 Retrospective Evaluation ........................................................................ 16 5 Conclusions .................................................................................................... 18 6 References ..................................................................................................... 18 7 Appendices ..................................................................................................... 19 Listing of Sign Test Calculations for each Static Measurement and all Survey Units. ................................................................................................................. 19 Page 4 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 2 Introduction During April 2014 through August 2016, ZionSolutions personnel conducted unconditional release surveys (URS) on dozens of structures. This evaluation addresses the following seven (7) major structures:

• Cribhouse

• East and West Service Buildings

• Interim Radwaste Storage Facility (IRSF)

• Turbine Building

• Unit 1 and 2 Containments Exterior Surfaces These surveys were designed and implemented in accordance with ZS-LT-400-001-001 where the principal acceptance criterion for unconditional release was applied to scan measurements. A total of 87 survey units were designated as part of the survey campaign and the survey design included ambient background measurements, surface scans, static measurements (taken at the location of the highest scan reading), and loose surface contamination measurements (smears). The survey results showed that all scan measurements passed the acceptance criteria, but the background and fixed point measurements were not specifically evaluated. The ambient background measurements were used to calculate a minimum detectable count rate (MDCR) which was used to develop the scanning acceptance criterion. In the implementation of these surveys, this acceptance criterion was used to establish an alarm setpoint on the measurement instrument representing the background count rate plus the calculated MDCR for each survey unit. In addition to this acceptance criterion, the surveyors were trained to identify and re-evaluate areas where there was an increase in the instruments audible signal (click-rate).

Within the 87 survey units, a total of 4,734 static measurements and 758 individual ambient background measurements were made and recorded. Since all of the scan data met the acceptance criteria, the buildings were unconditionally released. To date, the material was primarily used to backfill the Cribhouse. The Turbine Building was backfilled with clean soil from offsite and partially with concrete (approximately 8 feet).

In parallel with the execution of the URS of the subject buildings, the license termination plan (LTP) had been prepared and submitted for review to the Nuclear Regulatory Commission (NRC) staff. During the review process, the NRC issued to ZionSolutions three rounds of Requests for Additional Information, or RAIs. One of the RAIs specifically requested additional information and analysis of the surveys using a MARSSIM-based statistical analysis. This evaluation provides the analysis of the static measurements and ambient background results using MARSSIM-based analysis techniques as well as a retrospective analysis of the survey designs.

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Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 3 Methods 3.1 Available Data Table 1 shows a summary of the survey data collected for the URS of each of the major buildings. As shown in the table information, each building was divided into survey units and classified using guidance from MARSSIM. This was based on information contained in Zions Historical Site Assessment (HSA). For each building listed in Table 1, the scan percentage and number of static measurements are provided. In addition, the mean number of static measurements per survey unit and the smallest (minimum) number of static measurements collected in a survey unit for each building are shown.

For all static measurements, a Ludlum model 43-68 detector connected to a Ludlum model 2350-1 data logger/scaler was used. This detector is a 100 cm2 gas flow proportional detector that can be used for measurement of alpha and/or beta radiation. For these surveys, only beta measurements were conducted. For some areas, a 600 cm2 floor monitor was used but this data is not assessed in this evaluation.

Table 1: Summary of Survey Data No. of Survey Units Scan Percentage Mean Minimum No. No. of No. of No. of Survey Class Class Class Class Class Class Statics Statics Total Statics in Areas 1 2 3 1 2 3 per an Area Area 1

Turbine Building 57 1 115 64 180 100 25 5 3172 56 10 East & West 2 20 2 13 35 50 100 25 5-10 1047 52 4 Service Buildings IRSF 4 NA 5 4 9 NA 25 5 254 64 35 U1 and U2 25-2 NA 4 2 6 NA 5 65 33 30 Containment 100 Cribhouse 4 NA 4 6 10 NA 5-25 5-10 196 49 42 1 2 This minimum is from a single survey unit (06902C - Turbine Building South Exterior (873 m )

2 This minimum is from a single survey unit (07200C - West Service Building Stair S3 (53 m2)

For each survey unit, ambient background measurements were taken and recorded. As required by ZS-LT-400-001-001, these measurements were taken in the ambient environment with a distance of at least 6 inches from surfaces. The purpose of these background measurements was to establish a MDCR for scanning since it was recognized that ambient background radiation levels varied across the site due to the movement or temporary storage of radioactive wastes destined for ultimate disposal and no credit was taken for material-specific backgrounds. The number of ambient background measurements varied across each of the survey units, but the average number, minimum Page 6 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 number, and maximum number of ambient background values was 8.7, 1, and 19, respectively. The average, minimum, and maximum background count rates from this data set (all 758 ambient background values combined) were 273, 169, and 556 cpm, respectively, across all 87 survey units.

A listing of the survey units represented by the summary data in Table 1 is provided in Table 2, which shows a secondary survey unit number used for convenience in this analysis, the Survey Unit name, and its associated building.

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Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Table 2: Listing of 87 Survey Units Survey Survey SU Name Building Name SU Name Building Name Unit # Unit #

1 09501A IRSF Cask Storage Area Interim Radwaste Storage Facility 36 06507A TB 617 North Turbine Building 2 09501B IRSF Interim Radwaste Storage Facility 37 06507B TB 617 North Turbine Building 3 09501C IRSF Interim Radwaste Storage Facility 38 06507C TB 617 North Turbine Building 4 09504 IRSF Roof Interim Radwaste Storage Facility 39 06601A TB 630 North Turbine Building 5 06311-1A TB 592 Central Turbine Building 40 06601B TB 630 South Turbine Building 6 06311A TB 592 Central Turbine Building 41 06708A TB 642 South Turbine Building 7 06311B TB 592 Central Turbine Building 42 06708B TB 642 South Turbine Building 8 06311C TB 592 Central Turbine Building 43 06708C TB 642 South Turbine Building 9 06311D TB 592 Central Turbine Building 44 06708D TB 642 South Turbine Building 10 06311E TB 592 Central Turbine Building 45 06709A TB 642 Central Turbine Building 11 06311F TB 592 Central Turbine Building 46 06709B TB 642 Central Turbine Building 12 06311G TB 592 Central Turbine Building 47 06709C TB 642 Central Turbine Building 13 06311H TB 592 Central Turbine Building 48 06709D TB 642 Central Turbine Building 14 06310A TB 592 South Turbine Building 49 06709E TB 642 Central Turbine Building 15 06310B TB 592 South Turbine Building 50 06709F TB 642 Central Turbine Building 16 06310C TB 592 South Turbine Building 51 06710A TB 642 North Turbine Building 17 06310D TB 592 South Turbine Building 52 06710B TB 642 North Turbine Building 18 06310E TB 592 South Turbine Building 53 06710C TB 642 North Turbine Building 19 06310F TB 592 South Turbine Building 54 06710D TB 642 North Turbine Building 20 06312A TB 592 North Turbine Building 55 06801A TB 656 MSSVG Turbine Building 21 06312B TB 592 North Turbine Building 56 06801B TB 656 MSSVG Turbine Building 22 06312C TB 592 North Turbine Building 57 06902A TB W Ext Turbine Building 23 06312D TB 592 North Turbine Building 58 06902B TB N Ext Turbine Building 24 06312E TB 592 North Turbine Building 59 06902C TB S Ext Turbine Building 25 06401A TB 609 North Turbine Building 60 06902D TB E Ext Turbine Building 26 06401B TB 609 South Turbine Building 61 06902E TB Heater Bay Ext Turbine Building 27 06505A TB 617 South Turbine Building 62 07001C ESB S Stairwell East Service Building 28 06505B TB 617 South Turbine Building 63 07001D ESB N Stairwell East Service Building 29 06505C TB 617 South Turbine Building 64 07002A WSB Stair S1 West Service Building 30 06506A TB 617 Central Turbine Building 65 07002B WSB Stair S2 West Service Building 31 06506B TB 617 Central Turbine Building 66 07002C WSB Stair S3 West Service Building 32 06506C TB 617 Central Turbine Building 67 07102A WSB 592 West Service Building 33 06506D TB 617 Central Turbine Building 68 07102B WSB 592 West Service Building 34 06506E TB 617 Central Turbine Building 69 07102C WSB 592 West Service Building 35 06506F TB 617 Central Turbine Building 70 07102D WSB 592 West Service Building Page 8 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Survey Survey SU Name Building Name SU Name Building Name Unit # Unit #

71 07102E WSB 592 West Service Building 80 07702 WSB Roof West Service Building 72 07201 ESB 608 East Service Building 81 07703 EWSB Ext East and West Service Buildings 73 07202 WSB 608 West Service Building 82 08200A Cribhouse Cribhouse 74 07301 ESB 624 East Service Building 83 08200B Cribhouse Cribhouse 75 07302 WSB 624 West Service Building 84 08200C Cribhouse Cribhouse 76 07401 ESB 636 East Service Building 85 08301 Cribhouse Ext Cribhouse 77 07402 WSB 645 West Service Building 86 01402A U1 Exterior Unit 1 Containment Building 78 07101 ESB 592 East Service Building 87 02402A U2 Exterior Unit 2 Containment Building 79 07701 ESB Roof East Service Building Page 9 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 3.2 Application of the Sign Test For most MARSSIM surveys, a derived concentration guideline level (DCGL) is derived and represents a quantity of radioactivity distributed in a volume or surface area of material and is related to a dose quantity. This DCGL is applied in the non-parametric Sign test to determine whether a survey unit passes the criteria by first listing the difference between each measurement and its associated DCGL. The DCGL terminology used in this analysis is not related to any of the DCGL concepts contained in the Zion LTP or its supporting documents.

In the case of the surveys represented in this analysis, any identified licensed radioactive material would have failed the ultimate survey criteria for unconditional release; therefore, a detectability criterion is required to represent a DCGL rather than an activity concentration. This DCGL can represent an instrument count rate rather than an activity level provided that the following conditions are met, otherwise, detector backgrounds across different instruments would not be correlated or comparable:

• Beta counting efficiencies for various instruments used in the surveys are identical or at least similar, and

• All instruments passed pre and post use daily QC checks or a survey was repeated.

In the case of the unconditional release surveys, these criteria were met through programmatic and procedural controls.

Therefore, using the premise that all background measurements can be compared, a background (Rb,i) and standard deviation ( Rb,i) for the background measurements of each survey unit was calculated. For the two survey units where only 1 background measurement was taken, a standard deviation was calculated by applying a coefficient of variation (CV) to the background value for the unit for all 87 survey units (758 ambient background measurements). Once these quantities were calculated, a DCGL was calculated as shown in Equation 1.

() = , () + 2. 33, () Equation 1 This DCGL represents the critical level above background for K of 5% and is consistent with applying a non-detection criteria for unconditional release of materials using the Sign test. The average, minimum, and maximum DCGL are 441 cpm, 236 cpm, and 1097 cpm, respectively, for all 87 survey units. This range of values indicates that ambient background levels were variable across the site during the survey periods.

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Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 We recognize that applying the Sign test as described above, against the ambient background levels, is not discussed in MARSSIM [3] but this approach is consistent with a similar approach taken for the Connecticut Yankee decommissioning.

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Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Table 3: Background Values and DCGLs for Each Survey Survey No. of Mean Bkg DCGL, Unit Unit # Bkg Bkg Standard cpm Values Value, Deviation, Survey No. of Mean Bkg DCGL, cpm cpm Unit # Bkg Bkg Standard cpm Values Value, Deviation, 26 13 208 66 361 cpm cpm 27 7 243 58 378 1 8 202 20 249 28 7 305 113 569 29 8 281 54 408 2 6 205 34 284 30 12 299 123 585 3 6 198 43 298 4 10 274 81 464 31 8 277 86 478 5 8 219 54 344 32 6 253 49 366 6 11 228 83 421 33 7 282 70 444 7 12 201 47 310 34 11 227 42 324 35 11 222 48 333 8 9 192 54 318 9 8 234 55 362 36 15 268 45 373 10 8 169 29 236 37 13 248 84 445 11 9 214 42 312 38 19 247 67 404 12 12 226 50 342 39 2 214 54 341 13 15 242 59 380 40 4 251 56 382 14 8 247 90 456 41 12 241 87 443 15 7 248 34 327 42 15 301 65 452 16 11 208 46 314 43 8 245 74 418 44 15 264 60 404 17 9 226 55 353 45 16 250 79 434 18 9 229 63 377 19 9 214 42 312 46 12 281 66 435 20 12 242 57 375 47 6 303 70 466 21 9 200 61 341 48 10 294 85 491 22 12 210 52 330 49 10 261 59 398 23 9 195 73 366 50 9 233 51 351 24 13 217 65 370 51 12 340 178 755 25 11 209 75 383 52 14 258 103 499 Page 12 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Survey No. of Mean Bkg DCGL, Survey No. of Mean Bkg DCGL, Unit # Bkg Bkg Standard cpm Unit # Bkg Bkg Standard cpm Values Value, Deviation, Values Value, Deviation, cpm cpm cpm cpm 53 13 269 99 500 80 5 547 186 980 54 9 277 93 495 81 7 261 84 457 55 2 313 79 497 82 5 324 24 381 56 5 285 58 420 83 5 235 46 342 57 10 275 67 432 84 4 309 40 402 58 6 241 62 386 85 10 556 232 1097 59 1 223 58 358 86 9 356 135 669 60 4 231 32 305 87 9 286 84 481 61 5 235 63 382 62 2 307 78 489 63 2 278 71 443 64 2 344 87 548 65 3 304 54 430 66 1 286 73 455 67 7 280 54 405 68 5 269 76 445 69 4 283 53 405 70 12 288 66 441 71 7 336 63 483 72 17 343 115 611 73 10 333 82 524 74 12 452 94 670 75 8 376 93 592 76 15 501 108 753 77 3 358 119 636 78 9 338 113 601 79 7 325 85 522 Page 13 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 4 Results 4.1 Sign Test Appendix 0 contains all 4,734 measurement results subdivided into each of the survey units and shows the gross count rate for each static measurement, the difference between the gross count rate and the survey-unit-specific DCGL from Table 3, and an indicator showing whether the difference is positive or negative. There are no differences that equal zero, so no adjustments to the number of samples are required for analysis using the Sign test.

The execution of the Sign test involves the comparison of the number of positive differences, S+, to the Critical Value, Cv, where:

Equation 2

= +

If, in this comparison, the value of S+ is greater than Cv, then the survey unit passes the Sign test.

Table 4 shows the results of the Sign test calculation for all 87 survey units, which all pass the Sign test criteria for K of 5%.

Table 4: Sign Test Results for All Survey Units No. of SU Sign Test No. of SU Sign Test Survey Critical Survey Critical Static S+ Pass or Static S+ Pass or Unit # Value Unit # Value Values, N Fail? Values, N Fail?

1 97 79 56.6 PASS 13 37 37 23.5 PASS 2 60 45 36.4 PASS 14 50 48 30.8 PASS 3 35 27 22.4 PASS 15 45 43 28.0 PASS 4 62 60 37.5 PASS 16 80 80 47.4 PASS 5 31 26 20.1 PASS 17 80 80 47.4 PASS 6 53 53 32.5 PASS 18 68 68 40.8 PASS 7 35 34 22.4 PASS 19 80 79 47.4 PASS 8 61 61 36.9 PASS 20 60 57 36.4 PASS 9 65 63 39.1 PASS 21 54 54 33.0 PASS 10 75 70 44.6 PASS 22 60 59 36.4 PASS 11 80 79 47.4 PASS 23 55 55 33.6 PASS 12 59 57 35.8 PASS 24 85 85 50.1 PASS Page 14 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 No. of SU Sign Test No. of SU Sign Test Survey Critical Survey Critical Static S+ Pass or Static S+ Pass or Unit # Value Unit # Value Values, N Fail? Values, N Fail?

25 110 104 63.6 PASS 57 28 27 18.4 PASS 26 104 97 60.4 PASS 58 15 15 10.7 PASS 27 84 83 49.5 PASS 59 10 8 7.6 PASS 28 55 55 33.6 PASS 60 14 11 10.1 PASS 29 71 70 42.4 PASS 61 20 20 13.7 PASS 30 65 62 39.1 PASS 62 30 30 19.5 PASS 31 35 35 22.4 PASS 63 30 30 19.5 PASS 32 66 66 39.7 PASS 64 14 14 10.1 PASS 33 68 67 40.8 PASS 65 25 25 16.6 PASS 34 84 83 49.5 PASS 66 4 4 3.6 PASS 35 81 81 47.9 PASS 67 83 73 49.0 PASS 36 61 60 36.9 PASS 68 45 44 28.0 PASS 37 57 57 34.7 PASS 69 37 37 23.5 PASS 38 56 55 34.2 PASS 70 157 157 88.8 PASS 39 28 28 18.4 PASS 71 38 37 24.1 PASS 40 28 28 18.4 PASS 72 106 106 61.5 PASS 41 75 75 44.6 PASS 73 86 86 50.6 PASS 42 39 39 24.6 PASS 74 86 86 50.6 PASS 43 49 49 30.3 PASS 75 70 70 41.9 PASS 44 70 68 41.9 PASS 76 76 76 45.2 PASS 45 82 81 48.4 PASS 77 14 14 10.1 PASS 46 45 45 28.0 PASS 78 69 69 41.3 PASS 47 38 35 24.1 PASS 79 56 47 34.2 PASS 48 36 34 22.9 PASS 80 5 5 4.3 PASS 49 82 82 48.4 PASS 81 16 15 11.3 PASS 50 65 65 39.1 PASS 82 48 48 29.7 PASS 51 54 52 33.0 PASS 83 42 41 26.3 PASS 52 52 52 31.9 PASS 84 42 40 26.3 PASS 53 49 48 30.3 PASS 85 64 64 38.6 PASS 54 43 43 26.9 PASS 86 30 30 19.5 PASS 55 20 20 13.7 PASS 87 35 31 22.4 PASS 56 20 20 13.7 PASS Page 15 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 4.2 Retrospective Evaluation Although the unconditional release surveys were not designed in compliance with MARSSIM, Section 4.1 shows that all of the survey units would have passed the sign test based on the static measurements only. If the surveys had been designed using MARSSIM and based on static measurements, a retrospective analysis that evaluates whether an adequate number of samples was collected in each survey unit could be done. This retrospective analysis provides that evaluation.

The number of fixed static samples that would be required for analysis using the sign test is a function of delta () and sigma () where:

= , and Sigma is the standard deviation of the static measurements within a survey unit.

Using MARSSIM, the larger the value of delta, the lower the number of required samples.

Therefore, to maintain conservatism, a value corresponding to the mean of each measurement unit will be selected for the lower bound of the gray region (LBGR) will be used in this analysis. As discussed above, the DCGL for this analysis is set to the critical level, Lc, for each survey unit specifically for the unconditional release criteria. As discussed previously in this analysis, note that this specific DCGL is not related to the various DCGLs provided in the Zion draft LTP and supporting documents and have no relationship to any dose criterion.

From the above, the relative shift (/) is calculated for each survey unit and the corresponding value of Sign p is determined from MARSSIM Table 5.4. The number of samples, N, is then calculated using Equation 3.

( + )

= Equation 3

( . )

For this analysis, the values of alpha and beta are set to .05 (5%), therefore the corresponding values of Z are both 1.645. Table 5 provides a summary of the required number of samples for each of the 87 survey units.

The data in Table 5 show that six (6) out of the 87 survey units would not have met the required number of samples to meet the sign test criteria established in this analysis. This deficit represents a total of 42 additional static measurements distributed in the 6 survey units that would have been required if the survey design used the methods described in this analysis. This is a small number of additional samples out of the total of 4734 static measurements (<1%) given that material-specific backgrounds were not considered here and some of the survey units would have been combined for a MARSSIM-designed survey.

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Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Table 5: Retrospective Analysis for the Number of Samples LBGR LBGR Avg. No. of # of Avg. No. of # of Static SU SU Samples Static SU SU Samples Survey Delta/ Sign Req'd Survey Delta/ Sign Req'd Survey Sigma, Static Meet Survey Sigma, Static Meet Unit # Sigma p No. Unit # Sigma p No.

Unit cpm Values, Sign Test Unit cpm Values, Sign Test Value, N  ? Value, N  ?

cpm cpm 1 224.5 26.7 0.9 0.8 27 97 Yes 45 219.3 68.3 3.0 1.0 11 82 Yes 2 251.0 49.2 0.6 0.7 53 60 Yes 46 287.9 85.0 1.7 1.0 13 45 Yes 3 248.7 58.2 0.8 0.8 33 35 Yes 47 300.2 230.3 0.7 0.8 41 38 No 4 309.0 53.6 2.5 1.0 11 62 Yes 48 265.3 96.9 2.0 1.0 12 36 Yes 5 253.0 105.6 0.8 0.8 33 31 No 49 205.0 48.0 3.0 1.0 11 82 Yes 6 186.4 41.5 3.0 1.0 11 53 Yes 50 194.0 44.0 3.0 1.0 11 65 Yes 7 211.1 58.7 1.6 0.9 14 35 Yes 51 322.1 141.2 3.0 1.0 11 54 Yes 8 201.4 53.4 2.0 1.0 12 61 Yes 52 245.4 76.2 3.0 1.0 11 52 Yes 9 210.7 57.7 2.5 1.0 11 65 Yes 53 232.9 85.9 3.0 1.0 11 49 Yes 10 164.9 38.0 1.8 1.0 13 75 Yes 54 252.1 70.8 3.0 1.0 11 43 Yes 11 166.2 49.9 2.5 1.0 11 80 Yes 55 312.3 57.6 3.0 1.0 11 20 Yes 12 224.6 57.6 2.0 1.0 12 59 Yes 56 288.7 57.2 2.0 1.0 12 20 Yes 13 254.7 62.0 2.0 1.0 12 37 Yes 57 260.8 82.7 2.0 1.0 12 28 Yes 14 206.2 73.8 3.0 1.0 11 50 Yes 58 226.3 56.4 2.5 1.0 11 15 Yes 15 252.0 44.0 1.6 0.9 14 45 Yes 59 278.4 71.6 1.1 0.9 20 10 No 16 193.7 58.7 2.0 1.0 12 80 Yes 60 245.9 65.5 0.9 0.8 27 14 No 17 216.8 54.1 2.5 1.0 11 80 Yes 61 218.3 49.4 3.0 1.0 11 20 Yes 18 202.1 49.2 3.0 1.0 11 68 Yes 62 290.4 79.6 2.0 1.0 12 30 Yes 19 166.1 49.9 2.5 1.0 11 80 Yes 63 261.2 60.3 3.0 1.0 11 30 Yes 20 224.6 65.2 2.0 1.0 12 60 Yes 64 324.9 42.0 3.0 1.0 11 14 Yes 21 191.5 50.3 2.5 1.0 11 54 Yes 65 290.5 51.4 2.5 1.0 11 25 Yes 22 231.7 49.5 1.9 1.0 12 60 Yes 66 278.0 61.0 2.5 1.0 11 4 No 23 193.7 51.8 3.0 1.0 11 55 Yes 67 331.1 59.7 1.2 0.9 18 83 Yes 24 181.7 56.9 3.0 1.0 11 85 Yes 68 264.2 76.9 2.0 1.0 12 45 Yes 25 227.2 74.3 2.0 1.0 12 110 Yes 69 274.5 38.5 3.0 1.0 11 37 Yes 26 221.6 71.6 1.9 1.0 12 104 Yes 70 245.3 48.0 3.0 1.0 11 157 Yes 27 200.6 53.1 3.0 1.0 11 84 Yes 71 329.6 67.6 2.0 1.0 12 38 Yes 28 234.9 61.8 3.0 1.0 11 55 Yes 72 281.8 82.4 3.0 1.0 11 106 Yes 29 240.8 78.1 2.0 1.0 12 71 Yes 73 274.5 47.4 3.0 1.0 11 86 Yes 30 235.1 121.1 2.5 1.0 11 65 Yes 74 293.6 90.6 3.0 1.0 11 86 Yes 31 227.6 60.6 3.0 1.0 11 35 Yes 75 334.9 75.7 3.0 1.0 11 70 Yes 32 222.1 48.7 2.5 1.0 11 66 Yes 76 368.5 144.0 2.5 1.0 11 76 Yes 33 231.2 62.5 3.0 1.0 11 68 Yes 77 306.1 42.1 3.0 1.0 11 14 Yes 34 191.5 54.0 2.0 1.0 12 84 Yes 78 284.1 83.9 3.0 1.0 11 69 Yes 35 189.2 51.6 2.5 1.0 11 81 Yes 79 349.1 168.9 1.0 0.8 23 56 Yes 36 242.1 62.4 2.0 1.0 12 61 Yes 80 655.2 135.9 2.0 1.0 12 5 No 37 216.1 74.5 3.0 1.0 11 57 Yes 81 305.6 72.3 2.0 1.0 12 16 Yes 38 229.2 61.3 2.5 1.0 11 56 Yes 82 293.6 47.5 1.8 1.0 13 48 Yes 39 231.1 63.3 1.7 1.0 13 28 Yes 83 256.0 37.3 2.0 1.0 12 42 Yes 40 208.5 65.3 2.5 1.0 11 28 Yes 84 291.6 61.7 1.7 1.0 13 42 Yes 41 241.7 85.7 2.0 1.0 12 75 Yes 85 494.8 211.7 2.5 1.0 11 64 Yes 42 306.6 59.3 2.0 1.0 12 39 Yes 86 324.8 38.4 3.0 1.0 11 30 Yes 43 209.3 73.4 2.5 1.0 11 49 Yes 87 294.2 57.8 3.0 1.0 11 35 Yes 44 301.2 94.2 1.0 0.8 23 70 Yes Page 17 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 5 Conclusions This analysis shows that using a DCGL corresponding to the critical level of background measurements for each survey unit, then all survey units would have passed the the Sign test criteria. As discussed above, all measurements in each survey unit were less than the unconditional release criteria of 5000 dpm/100cm2 using an acceptance criteria of MDCR plus background count rate. In fact, no individual scan measurements exceeded the scan-MDCR plus background criteria. In retrospect, if these surveys had been designed using MARSSIM criteria, it is possible that some of the survey units would have been combined to address a small fraction of the survey units in regards to the number of samples. Also, if the surveys were specifically designed using all of the MARSSIM criteria, a small fraction of the survey units (six) may have required an investigation of material-specific backgrounds or of fluctuating ambient backgrounds due to movements of radioactive materials during the surveys. Such investigations may have been performed during the survey process, but, since the acceptance criteria was met for scan surveys, investigations were not required or performed. Given that this analysis criteria (using the critical level as a DCGL) is more conservative than the criteria applied from the scan surveys, we believe this provides additional evidence that the materials met the unconditional release criteria for the materials that were surveyed. Furthermore, we are applying a very conservative dose for the materials used for backfill where we assume that all surfaces contain residual radioactivity at either 5000 dpm/100cm2 or at the maximum observed value corresponding to the MDCR plus background count rate. The corresponding dose associated with 5000 dpm/100cm2 is 0.7 mrem.

6 References

[1] "ZS-LT-400-001-001, Unconditional Release of Material, Equipment and Secondary Structures".

[2] James C. Ashley, Email to john.hickman@nrc.gov; Marlayna.Vaaler@nrc.gov; Bill.Lin@nrc.gov. "Zion LTP/ RAI Information:

RAI Set 3, Zion Response to NRC Question HP 2", Zion, Ill.: Energy Solutions, 2017.

[3] "NUREG-1575, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)".

Page 18 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 7 Appendices Listing of Sign Test Calculations for each Static Measurement and all Survey Units.

Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 1 225 23.82 1 1 221 27.82 1 1 244 4.82 1 1 227 21.82 1 1 196 52.92 1 1 229 19.82 1 1 212 36.82 1 1 231 17.82 1 1 264 -15.18 -1 1 197 51.82 1 1 220 28.82 1 1 258 -9.18 -1 1 213 35.82 1 1 212 36.82 1 1 266 -17.18 -1 1 211 37.82 1 1 212 36.82 1 1 246 2.82 1 1 232 16.82 1 1 217 31.82 1 1 233 15.82 1 1 232 16.82 1 1 219 29.82 1 1 283 -34.18 -1 1 215 33.82 1 1 193 55.82 1 1 251 -2.18 -1 1 232 16.82 1 1 198 50.82 1 1 219 29.82 1 1 253 -4.18 -1 1 180 68.82 1 1 231 17.82 1 1 243 5.82 1 1 172 76.82 1 1 170 78.82 1 1 243 5.82 1 1 210 38.82 1 1 222 26.82 1 1 223 25.82 1 1 232 16.82 1 1 205 43.82 1 1 219 29.82 1 1 231 17.82 1 1 201 47.82 1 1 228 20.82 1 1 259 -10.18 -1 1 203 45.82 1 1 217 31.82 1 1 283 -34.18 -1 1 214 34.82 1 1 219 29.82 1 1 251 -2.18 -1 1 176 72.82 1 1 228 20.82 1 1 208 40.82 1 1 217 31.82 1 1 252 -3.18 -1 1 264 -15.18 -1 1 150 98.82 1 1 241 7.82 1 1 248 0.82 1 1 189 59.82 1 1 218 30.82 1 1 242 6.82 1 1 251 -2.18 -1 1 232 16.82 1 1 223 25.82 1 1 210 38.82 1 1 218 30.82 1 1 263 -14.18 -1 1 203 45.82 1 1 194 54.82 1 1 276 -27.18 -1 1 223 25.82 1 1 222 26.82 1 1 261 -12.18 -1 1 194 54.82 1 1 191 57.82 1 1 213 35.82 1 1 182 66.82 1 1 214 34.82 1 1 233 15.82 1 1 180 68.82 1 1 222 26.82 1 1 216 32.82 1 1 197 51.82 1 1 244 4.82 1 1 240 8.82 1 2 232 52.27 1 1 216 32.82 1 1 208 40.82 1 2 228 56.27 1 1 241 7.82 1 1 256 -7.18 -1 2 212 72.27 1 1 228 20.82 1 1 262 -13.18 -1 2 235 49.27 1 1 208 40.82 1 1 303 -54.18 -1 2 205 79.27 1 Page 19 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 2 237 47.27 1 2 316 -31.73 -1 3 233 64.66 1 2 225 59.27 1 2 376 -91.73 -1 3 181 116.66 1 2 213 71.27 1 2 266 18.27 1 3 163 134.66 1 2 228 56.27 1 2 258 26.27 1 3 220 77.66 1 2 254 30.27 1 2 340 -55.73 -1 3 205 92.66 1 2 233 51.27 1 2 162 122.27 1 3 254 43.66 1 2 198 86.27 1 2 319 -34.73 -1 3 261 36.66 1 2 197 87.27 1 2 277 7.27 1 3 237 60.66 1 2 199 85.27 1 2 277 7.27 1 3 247 50.66 1 2 170 114.27 1 2 275 9.27 1 3 231 66.66 1 2 252 32.27 1 2 264 20.27 1 3 252 45.66 1 2 252 32.27 1 2 233 51.27 1 3 178 119.66 1 2 225 59.27 1 2 210 74.27 1 4 255 208.76 1 2 190 94.27 1 2 225 59.27 1 4 263 200.76 1 2 156 128.27 1 2 257 27.27 1 4 260 203.76 1 2 185 99.27 1 2 245 39.27 1 4 264 199.76 1 2 186 98.27 1 3 285 12.66 1 4 201 262.76 1 2 178 106.27 1 3 318 -20.34 -1 4 295 168.76 1 2 200 84.27 1 3 359 -61.34 -1 4 252 211.76 1 2 220 64.27 1 3 218 79.66 1 4 299 164.76 1 2 236 48.27 1 3 341 -43.34 -1 4 266 197.76 1 2 241 43.27 1 3 331 -33.34 -1 4 282 181.76 1 2 247 37.27 1 3 332 -34.34 -1 4 329 134.76 1 2 287 -2.73 -1 3 351 -53.34 -1 4 305 158.76 1 2 326 -41.73 -1 3 315 -17.34 -1 4 305 158.76 1 2 264 20.27 1 3 282 15.66 1 4 326 137.76 1 2 249 35.27 1 3 336 -38.34 -1 4 255 208.76 1 2 266 18.27 1 3 235 62.66 1 4 349 114.76 1 2 263 21.27 1 3 236 61.66 1 4 323 140.76 1 2 304 -19.73 -1 3 219 78.66 1 4 262 201.76 1 2 307 -22.73 -1 3 240 57.66 1 4 402 61.76 1 2 297 -12.73 -1 3 132 165.66 1 4 272 191.76 1 2 331 -46.73 -1 3 234 63.66 1 4 375 88.76 1 2 281 3.27 1 3 150 147.66 1 4 279 184.76 1 2 293 -8.73 -1 3 222 75.66 1 4 277 186.76 1 2 287 -2.73 -1 3 193 104.66 1 4 267 196.76 1 2 349 -64.73 -1 3 223 74.66 1 4 234 229.76 1 2 326 -41.73 -1 3 239 58.66 1 4 301 162.76 1 2 294 -9.73 -1 3 250 47.66 1 4 322 141.76 1 Page 20 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 4 285 178.76 1 156.05 6 228 192.62 1 4 291 172.76 1 5 428 -84.05 -1 6 250 170.62 1 4 290 173.76 1 5 199 144.95 1 6 137 283.62 1 4 411 52.76 1 5 262 81.95 1 6 138 282.62 1 4 468 -4.24 -1 5 354 -10.05 -1 6 141 279.62 1 4 260 203.76 1 5 208 135.95 1 6 162 258.62 1 4 278 185.76 1 5 238 105.95 1 6 149 271.62 1 4 271 192.76 1 5 287 56.95 1 6 175 245.62 1 4 296 167.76 1 5 259 84.95 1 6 143 277.62 1 4 289 174.76 1 5 230 113.95 1 6 193 227.62 1 4 273 190.76 1 5 283 60.95 1 6 138 282.62 1 4 289 174.76 1 5 255 88.95 1 6 159 261.62 1 4 293 170.76 1 5 271 72.95 1 6 140 280.62 1 4 308 155.76 1 5 285 58.95 1 6 197 223.62 1 4 284 179.76 1 5 265 78.95 1 6 157 263.62 1 4 314 149.76 1 5 252 91.95 1 6 157 263.62 1 4 278 185.76 1 5 277 66.95 1 6 147 273.62 1 4 291 172.76 1 5 286 57.95 1 6 204 216.62 1 4 273 190.76 1 5 175 168.95 1 6 188 232.62 1 4 274 189.76 1 5 149 194.95 1 6 139 281.62 1 4 478 -14.24 -1 5 157 186.95 1 6 142 278.62 1 4 367 96.76 1 5 115 228.95 1 6 174 246.62 1 4 366 97.76 1 5 127 216.95 1 6 156 264.62 1 4 340 123.76 1 5 138 205.95 1 6 174 246.62 1 4 340 123.76 1 5 160 183.95 1 6 172 248.62 1 4 405 58.76 1 5 128 215.95 1 6 170 250.62 1 4 398 65.76 1 5 201 142.95 1 6 197 223.62 1 4 378 85.76 1 5 135 208.95 1 6 142 278.62 1 4 377 86.76 1 6 261 159.62 1 6 176 244.62 1 4 336 127.76 1 6 264 156.62 1 6 200 220.62 1 4 354 109.76 1 6 245 175.62 1 6 147 273.62 1 4 301 162.76 1 6 249 171.62 1 6 170 250.62 1 4 305 158.76 1 6 231 189.62 1 6 167 253.62 1 4 281 182.76 1 6 245 175.62 1 6 110 310.62 1 4 293 170.76 1 6 215 205.62 1 6 194 226.62 1 5 555 - -1 6 234 186.62 1 6 155 265.62 1 211.05 6 229 191.62 1 6 156 264.62 1 5 370 -26.05 -1 6 222 198.62 1 6 159 261.62 1 5 293 50.95 1 6 252 168.62 1 6 204 216.62 1 5 500 - -1 Page 21 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 6 262 158.62 1 8 270 47.75 1 8 216 101.75 1 6 231 189.62 1 8 219 98.75 1 8 217 100.75 1 6 232 188.62 1 8 226 91.75 1 8 187 130.75 1 7 203 106.52 1 8 170 147.75 1 8 199 118.75 1 7 270 39.52 1 8 262 55.75 1 8 165 152.75 1 7 257 52.52 1 8 298 19.75 1 8 169 148.75 1 7 260 49.52 1 8 310 7.75 1 8 172 145.75 1 7 213 96.52 1 8 257 60.75 1 8 174 143.75 1 7 259 50.52 1 8 229 88.75 1 8 150 167.75 1 7 319 -9.48 -1 8 276 41.75 1 8 175 142.75 1 7 222 87.52 1 8 307 10.75 1 8 176 141.75 1 7 267 42.52 1 8 237 80.75 1 8 191 126.75 1 7 281 28.52 1 8 112 205.75 1 8 184 133.75 1 7 227 82.52 1 8 205 112.75 1 8 201 116.75 1 7 257 52.52 1 8 212 105.75 1 8 155 162.75 1 7 196 113.52 1 8 241 76.75 1 8 193 124.75 1 7 236 73.52 1 8 271 46.75 1 8 258 59.75 1 7 263 46.52 1 8 269 48.75 1 8 272 45.75 1 7 267 42.52 1 8 248 69.75 1 8 278 39.75 1 7 222 87.52 1 8 190 127.75 1 8 288 29.75 1 7 295 14.52 1 8 123 194.75 1 8 278 39.75 1 7 262 47.52 1 8 134 183.75 1 9 297 64.80 1 7 205 104.52 1 8 120 197.75 1 9 217 144.80 1 7 268 41.52 1 8 116 201.75 1 9 199 162.80 1 7 243 66.52 1 8 161 156.75 1 9 219 142.80 1 7 127 182.52 1 8 179 138.75 1 9 281 80.80 1 7 150 159.52 1 8 217 100.75 1 9 308 53.80 1 7 119 190.52 1 8 225 92.75 1 9 278 83.80 1 7 133 176.52 1 8 158 159.75 1 9 275 86.80 1 7 138 171.52 1 8 172 145.75 1 9 266 95.80 1 7 124 185.52 1 8 159 158.75 1 9 261 100.80 1 7 103 206.52 1 8 150 167.75 1 9 247 114.80 1 7 152 157.52 1 8 163 154.75 1 9 366 -4.20 -1 7 156 153.52 1 8 135 182.75 1 9 265 96.80 1 7 160 149.52 1 8 166 151.75 1 9 259 102.80 1 7 195 114.52 1 8 215 102.75 1 9 217 144.80 1 7 146 163.52 1 8 138 179.75 1 9 204 157.80 1 7 195 114.52 1 8 180 137.75 1 9 309 52.80 1 8 104 213.75 1 8 162 155.75 1 9 293 68.80 1 Page 22 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 9 280 81.80 1 9 182 179.80 1 10 143 92.71 1 9 286 75.80 1 9 146 215.80 1 10 194 41.71 1 9 137 224.80 1 9 171 190.80 1 10 166 69.71 1 9 171 190.80 1 9 229 132.80 1 10 194 41.71 1 9 122 239.80 1 9 170 191.80 1 10 158 77.71 1 9 113 248.80 1 9 231 130.80 1 10 158 77.71 1 9 137 224.80 1 9 197 164.80 1 10 159 76.71 1 9 116 245.80 1 9 307 54.80 1 10 200 35.71 1 9 132 229.80 1 10 131 104.71 1 10 177 58.71 1 9 175 186.80 1 10 142 93.71 1 10 174 61.71 1 9 180 181.80 1 10 127 108.71 1 10 170 65.71 1 9 186 175.80 1 10 265 -29.29 -1 10 144 91.71 1 9 187 174.80 1 10 262 -26.29 -1 10 125 110.71 1 9 195 166.80 1 10 250 -14.29 -1 10 176 59.71 1 9 195 166.80 1 10 221 14.71 1 10 165 70.71 1 9 208 153.80 1 10 230 5.71 1 10 139 96.71 1 9 177 184.80 1 10 220 15.71 1 10 158 77.71 1 9 190 171.80 1 10 267 -31.29 -1 10 128 107.71 1 9 198 163.80 1 10 177 58.71 1 10 174 61.71 1 9 188 173.80 1 10 153 82.71 1 10 124 111.71 1 9 214 147.80 1 10 225 10.71 1 10 154 81.71 1 9 175 186.80 1 10 275 -39.29 -1 10 138 97.71 1 9 159 202.80 1 10 135 100.71 1 10 138 97.71 1 9 151 210.80 1 10 142 93.71 1 10 140 95.71 1 9 182 179.80 1 10 136 99.71 1 10 146 89.71 1 9 176 185.80 1 10 135 100.71 1 10 186 49.71 1 9 172 189.80 1 10 157 78.71 1 10 147 88.71 1 9 193 168.80 1 10 128 107.71 1 10 138 97.71 1 9 226 135.80 1 10 151 84.71 1 10 122 113.71 1 9 201 160.80 1 10 119 116.71 1 10 151 84.71 1 9 194 167.80 1 10 119 116.71 1 10 135 100.71 1 9 210 151.80 1 10 109 126.71 1 10 169 66.71 1 9 207 154.80 1 10 143 92.71 1 10 153 82.71 1 9 192 169.80 1 10 163 72.71 1 10 157 78.71 1 9 385 -23.20 -1 10 131 104.71 1 10 167 68.71 1 9 196 165.80 1 10 138 97.71 1 10 169 66.71 1 9 163 198.80 1 10 118 117.71 1 10 194 41.71 1 9 173 188.80 1 10 187 48.71 1 10 135 100.71 1 9 157 204.80 1 10 166 69.71 1 10 207 28.71 1 Page 23 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 10 181 54.71 1 11 157 154.60 1 11 171 140.60 1 10 213 22.71 1 11 170 141.60 1 11 210 101.60 1 10 157 78.71 1 11 150 161.60 1 11 207 104.60 1 10 157 78.71 1 11 164 147.60 1 11 195 116.60 1 10 162 73.71 1 11 132 179.60 1 11 160 151.60 1 11 161 150.60 1 11 142 169.60 1 11 170 141.60 1 11 149 162.60 1 11 135 176.60 1 11 172 139.60 1 11 169 142.60 1 11 148 163.60 1 12 295 47.35 1 11 262 49.60 1 11 155 156.60 1 12 295 47.35 1 11 238 73.60 1 11 146 165.60 1 12 212 130.35 1 11 232 79.60 1 11 167 144.60 1 12 209 133.35 1 11 269 42.60 1 11 154 157.60 1 12 249 93.35 1 11 272 39.60 1 11 172 139.60 1 12 335 7.35 1 11 288 23.60 1 11 146 165.60 1 12 224 118.35 1 11 294 17.60 1 11 170 141.60 1 12 245 97.35 1 11 166 145.60 1 11 135 176.60 1 12 227 115.35 1 11 135 176.60 1 11 134 177.60 1 12 341 1.35 1 11 261 50.60 1 11 143 168.60 1 12 256 86.35 1 11 261 50.60 1 11 188 123.60 1 12 215 127.35 1 11 116 195.60 1 11 161 150.60 1 12 196 146.35 1 11 114 197.60 1 11 184 127.60 1 12 213 129.35 1 11 108 203.60 1 11 159 152.60 1 12 212 130.35 1 11 133 178.60 1 11 155 156.60 1 12 180 162.35 1 11 134 177.60 1 11 151 160.60 1 12 179 163.35 1 11 123 188.60 1 11 137 174.60 1 12 268 74.35 1 11 135 176.60 1 11 131 180.60 1 12 300 42.35 1 11 127 184.60 1 11 130 181.60 1 12 121 221.35 1 11 154 157.60 1 11 133 178.60 1 12 303 39.35 1 11 126 185.60 1 11 147 164.60 1 12 296 46.35 1 11 137 174.60 1 11 102 209.60 1 12 239 103.35 1 11 140 171.60 1 11 94 217.60 1 12 239 103.35 1 11 145 166.60 1 11 96 215.60 1 12 303 39.35 1 11 139 172.60 1 11 155 156.60 1 12 195 147.35 1 11 294 17.60 1 11 145 166.60 1 12 296 46.35 1 11 174 137.60 1 11 125 186.60 1 12 278 64.35 1 11 124 187.60 1 11 154 157.60 1 12 272 70.35 1 11 157 154.60 1 11 129 182.60 1 12 336 6.35 1 11 133 178.60 1 11 326 -14.40 -1 12 185 157.35 1 11 174 137.60 1 11 241 70.60 1 12 208 134.35 1 Page 24 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 12 181 161.35 1 13 338 42.16 1 14 283 173.19 1 12 361 -18.65 -1 13 281 99.16 1 14 233 223.19 1 12 158 184.35 1 13 315 65.16 1 14 275 181.19 1 12 196 146.35 1 13 200 180.16 1 14 256 200.19 1 12 152 190.35 1 13 222 158.16 1 14 180 276.19 1 12 189 153.35 1 13 220 160.16 1 14 215 241.19 1 12 166 176.35 1 13 183 197.16 1 14 161 295.19 1 12 171 171.35 1 13 273 107.16 1 14 187 269.19 1 12 193 149.35 1 13 312 68.16 1 14 185 271.19 1 12 205 137.35 1 13 325 55.16 1 14 145 311.19 1 12 176 166.35 1 13 335 45.16 1 14 163 293.19 1 12 355 -12.65 -1 13 305 75.16 1 14 180 276.19 1 12 162 180.35 1 13 331 49.16 1 14 182 274.19 1 12 219 123.35 1 13 288 92.16 1 14 174 282.19 1 12 176 166.35 1 13 261 119.16 1 14 166 290.19 1 12 198 144.35 1 13 322 58.16 1 14 183 273.19 1 12 211 131.35 1 13 225 155.16 1 14 147 309.19 1 12 203 139.35 1 13 313 67.16 1 14 166 290.19 1 12 208 134.35 1 13 309 71.16 1 14 152 304.19 1 12 204 138.35 1 13 284 96.16 1 14 172 284.19 1 12 132 210.35 1 13 216 164.16 1 14 155 301.19 1 12 160 182.35 1 13 141 239.16 1 14 201 255.19 1 12 201 141.35 1 13 174 206.16 1 14 168 288.19 1 12 157 185.35 1 13 144 236.16 1 14 178 278.19 1 12 205 137.35 1 13 169 211.16 1 14 199 257.19 1 12 198 144.35 1 14 506 -49.81 -1 14 169 287.19 1 12 193 149.35 1 14 475 -18.81 -1 14 196 260.19 1 13 305 75.16 1 14 304 152.19 1 14 178 278.19 1 13 271 109.16 1 14 206 250.19 1 14 183 273.19 1 13 280 100.16 1 14 219 237.19 1 14 167 289.19 1 13 246 134.16 1 14 252 204.19 1 14 185 271.19 1 13 278 102.16 1 14 239 217.19 1 14 163 293.19 1 13 256 124.16 1 14 209 247.19 1 14 177 279.19 1 13 156 224.16 1 14 283 173.19 1 14 188 268.19 1 13 163 217.16 1 14 214 242.19 1 14 142 314.19 1 13 181 199.16 1 14 110 346.19 1 14 157 299.19 1 13 280 100.16 1 14 285 171.19 1 15 298 28.52 1 13 334 46.16 1 14 282 174.19 1 15 307 19.52 1 13 188 192.16 1 14 113 343.19 1 15 234 92.52 1 Page 25 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 15 291 35.52 1 15 279 47.52 1 16 153 160.89 1 15 296 30.52 1 15 278 48.52 1 16 168 145.89 1 15 296 30.52 1 15 239 87.52 1 16 157 156.89 1 15 322 4.52 1 16 251 62.89 1 16 136 177.89 1 15 292 34.52 1 16 85 228.89 1 16 144 169.89 1 15 237 89.52 1 16 200 113.89 1 16 167 146.89 1 15 276 50.52 1 16 188 125.89 1 16 146 167.89 1 15 269 57.52 1 16 112 201.89 1 16 129 184.89 1 15 294 32.52 1 16 252 61.89 1 16 156 157.89 1 15 235 91.52 1 16 250 63.89 1 16 152 161.89 1 15 318 8.52 1 16 262 51.89 1 16 144 169.89 1 15 239 87.52 1 16 277 36.89 1 16 159 154.89 1 15 244 82.52 1 16 248 65.89 1 16 132 181.89 1 15 293 33.52 1 16 249 64.89 1 16 150 163.89 1 15 356 -29.48 -1 16 112 201.89 1 16 139 174.89 1 15 254 72.52 1 16 237 76.89 1 16 151 162.89 1 15 246 80.52 1 16 231 82.89 1 16 113 200.89 1 15 219 107.52 1 16 91 222.89 1 16 139 174.89 1 15 186 140.52 1 16 218 95.89 1 16 130 183.89 1 15 248 78.52 1 16 212 101.89 1 16 173 140.89 1 15 238 88.52 1 16 239 74.89 1 16 196 117.89 1 15 213 113.52 1 16 303 10.89 1 16 170 143.89 1 15 236 90.52 1 16 281 32.89 1 16 288 25.89 1 15 212 114.52 1 16 285 28.89 1 16 193 120.89 1 15 232 94.52 1 16 168 145.89 1 16 161 152.89 1 15 213 113.52 1 16 255 58.89 1 16 149 164.89 1 15 151 175.52 1 16 262 51.89 1 16 142 171.89 1 15 208 118.52 1 16 287 26.89 1 16 151 162.89 1 15 234 92.52 1 16 275 38.89 1 16 175 138.89 1 15 280 46.52 1 16 232 81.89 1 16 159 154.89 1 15 223 103.52 1 16 253 60.89 1 16 194 119.89 1 15 202 124.52 1 16 260 53.89 1 16 187 126.89 1 15 224 102.52 1 16 269 44.89 1 16 184 129.89 1 15 200 126.52 1 16 293 20.89 1 16 203 110.89 1 15 187 139.52 1 16 295 18.89 1 16 172 141.89 1 15 244 82.52 1 16 276 37.89 1 16 238 75.89 1 15 223 103.52 1 16 150 163.89 1 16 259 54.89 1 15 225 101.52 1 16 155 158.89 1 16 259 54.89 1 15 347 -20.48 -1 16 128 185.89 1 16 228 85.89 1 Page 26 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 16 138 175.89 1 17 242 111.12 1 17 176 177.12 1 16 114 199.89 1 17 194 159.12 1 17 283 70.12 1 16 123 190.89 1 17 170 183.12 1 17 289 64.12 1 16 112 201.89 1 17 233 120.12 1 17 205 148.12 1 16 225 88.89 1 17 251 102.12 1 17 352 1.12 1 17 276 77.12 1 17 207 146.12 1 17 267 86.12 1 17 281 72.12 1 17 219 134.12 1 17 334 19.12 1 17 229 124.12 1 17 184 169.12 1 18 237 139.52 1 17 266 87.12 1 17 233 120.12 1 18 225 151.52 1 17 306 47.12 1 17 241 112.12 1 18 236 140.52 1 17 222 131.12 1 17 192 161.12 1 18 195 181.52 1 17 331 22.12 1 17 177 176.12 1 18 280 96.52 1 17 131 222.12 1 17 224 129.12 1 18 273 103.52 1 17 297 56.12 1 17 228 125.12 1 18 242 134.52 1 17 216 137.12 1 17 199 154.12 1 18 255 121.52 1 17 302 51.12 1 17 224 129.12 1 18 163 213.52 1 17 315 38.12 1 17 178 175.12 1 18 141 235.52 1 17 299 54.12 1 17 210 143.12 1 18 155 221.52 1 17 287 66.12 1 17 177 176.12 1 18 133 243.52 1 17 180 173.12 1 17 200 153.12 1 18 155 221.52 1 17 222 131.12 1 17 187 166.12 1 18 270 106.52 1 17 202 151.12 1 17 229 124.12 1 18 163 213.52 1 17 246 107.12 1 17 160 193.12 1 18 280 96.52 1 17 234 119.12 1 17 149 204.12 1 18 228 148.52 1 17 194 159.12 1 17 142 211.12 1 18 168 208.52 1 17 232 121.12 1 17 127 226.12 1 18 260 116.52 1 17 250 103.12 1 17 151 202.12 1 18 275 101.52 1 17 240 113.12 1 17 157 196.12 1 18 179 197.52 1 17 248 105.12 1 17 160 193.12 1 18 172 204.52 1 17 274 79.12 1 17 139 214.12 1 18 184 192.52 1 17 245 108.12 1 17 143 210.12 1 18 170 206.52 1 17 230 123.12 1 17 150 203.12 1 18 171 205.52 1 17 271 82.12 1 17 181 172.12 1 18 186 190.52 1 17 194 159.12 1 17 293 60.12 1 18 196 180.52 1 17 162 191.12 1 17 145 208.12 1 18 209 167.52 1 17 199 154.12 1 17 166 187.12 1 18 202 174.52 1 17 184 169.12 1 17 182 171.12 1 18 170 206.52 1 17 159 194.12 1 17 172 181.12 1 18 179 197.52 1 17 155 198.12 1 17 142 211.12 1 18 163 213.52 1 Page 27 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 18 159 217.52 1 19 262 49.60 1 19 155 156.60 1 18 160 216.52 1 19 238 73.60 1 19 146 165.60 1 18 187 189.52 1 19 232 79.60 1 19 167 144.60 1 18 167 209.52 1 19 269 42.60 1 19 154 157.60 1 18 167 209.52 1 19 272 39.60 1 19 172 139.60 1 18 177 199.52 1 19 288 23.60 1 19 146 165.60 1 18 170 206.52 1 19 294 17.60 1 19 170 141.60 1 18 200 176.52 1 19 166 145.60 1 19 135 176.60 1 18 180 196.52 1 19 135 176.60 1 19 134 177.60 1 18 167 209.52 1 19 261 50.60 1 19 143 168.60 1 18 162 214.52 1 19 261 50.60 1 19 188 123.60 1 18 193 183.52 1 19 116 195.60 1 19 161 150.60 1 18 321 55.52 1 19 114 197.60 1 19 184 127.60 1 18 166 210.52 1 19 108 203.60 1 19 159 152.60 1 18 164 212.52 1 19 133 178.60 1 19 155 156.60 1 18 205 171.52 1 19 134 177.60 1 19 151 160.60 1 18 192 184.52 1 19 123 188.60 1 19 137 174.60 1 18 208 168.52 1 19 135 176.60 1 19 131 180.60 1 18 211 165.52 1 19 127 184.60 1 19 130 181.60 1 18 375 1.52 1 19 154 157.60 1 19 133 178.60 1 18 249 127.52 1 19 126 185.60 1 19 147 164.60 1 18 200 176.52 1 19 137 174.60 1 19 102 209.60 1 18 251 125.52 1 19 140 171.60 1 19 94 217.60 1 18 170 206.52 1 19 145 166.60 1 19 96 215.60 1 18 211 165.52 1 19 139 172.60 1 19 155 156.60 1 18 156 220.52 1 19 294 17.60 1 19 145 166.60 1 18 144 232.52 1 19 174 137.60 1 19 125 186.60 1 18 131 245.52 1 19 124 187.60 1 19 154 157.60 1 18 163 213.52 1 19 157 154.60 1 19 129 182.60 1 18 187 189.52 1 19 133 178.60 1 19 326 -14.40 -1 18 283 93.52 1 19 174 137.60 1 19 241 70.60 1 18 232 144.52 1 19 157 154.60 1 19 171 140.60 1 18 260 116.52 1 19 170 141.60 1 19 210 101.60 1 18 305 71.52 1 19 150 161.60 1 19 207 104.60 1 18 190 186.52 1 19 164 147.60 1 19 195 116.60 1 18 165 211.52 1 19 132 179.60 1 19 160 151.60 1 19 161 150.60 1 19 142 169.60 1 19 170 141.60 1 19 149 162.60 1 19 135 176.60 1 19 172 139.60 1 19 168 143.60 1 19 148 163.60 1 20 261 114.24 1 Page 28 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 20 267 108.24 1 20 178 197.24 1 21 260 80.88 1 20 270 105.24 1 20 165 210.24 1 21 263 77.88 1 20 183 192.24 1 20 213 162.24 1 21 229 111.88 1 20 237 138.24 1 20 161 214.24 1 21 271 69.88 1 20 213 162.24 1 20 181 194.24 1 21 210 130.88 1 20 239 136.24 1 20 173 202.24 1 21 202 138.88 1 20 393 -17.76 -1 20 138 237.24 1 21 168 172.88 1 20 378 -2.76 -1 20 140 235.24 1 21 145 195.88 1 20 333 42.24 1 20 131 244.24 1 21 107 233.88 1 20 205 170.24 1 20 171 204.24 1 21 152 188.88 1 20 278 97.24 1 20 145 230.24 1 21 123 217.88 1 20 230 145.24 1 20 212 163.24 1 21 127 213.88 1 20 262 113.24 1 20 200 175.24 1 21 177 163.88 1 20 322 53.24 1 20 217 158.24 1 21 166 174.88 1 20 293 82.24 1 20 186 189.24 1 21 159 181.88 1 20 312 63.24 1 20 231 144.24 1 21 220 120.88 1 20 317 58.24 1 20 178 197.24 1 21 183 157.88 1 20 264 111.24 1 20 169 206.24 1 21 176 164.88 1 20 273 102.24 1 20 179 196.24 1 21 133 207.88 1 20 232 143.24 1 20 192 183.24 1 21 138 202.88 1 20 395 -19.76 -1 21 194 146.88 1 21 172 168.88 1 20 229 146.24 1 21 213 127.88 1 21 148 192.88 1 20 237 138.24 1 21 254 86.88 1 21 198 142.88 1 20 273 102.24 1 21 213 127.88 1 21 202 138.88 1 20 270 105.24 1 21 208 132.88 1 21 185 155.88 1 20 165 210.24 1 21 107 233.88 1 21 195 145.88 1 20 152 223.24 1 21 207 133.88 1 21 189 151.88 1 20 250 125.24 1 21 186 154.88 1 21 162 178.88 1 20 257 118.24 1 21 116 224.88 1 21 182 158.88 1 20 339 36.24 1 21 213 127.88 1 21 185 155.88 1 20 197 178.24 1 21 314 26.88 1 21 175 165.88 1 20 170 205.24 1 21 279 61.88 1 21 193 147.88 1 20 154 221.24 1 21 289 51.88 1 21 132 208.88 1 20 216 159.24 1 21 256 84.88 1 21 151 189.88 1 20 145 230.24 1 21 294 46.88 1 21 141 199.88 1 20 183 192.24 1 21 232 108.88 1 22 163 167.25 1 20 154 221.24 1 21 221 119.88 1 22 218 112.25 1 20 195 180.24 1 21 217 123.88 1 22 183 147.25 1 20 172 203.24 1 21 111 229.88 1 22 205 125.25 1 Page 29 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 22 278 52.25 1 22 249 81.25 1 23 157 208.74 1 22 284 46.25 1 22 192 138.25 1 23 157 208.74 1 22 274 56.25 1 22 228 102.25 1 23 113 252.74 1 22 318 12.25 1 22 241 89.25 1 23 125 240.74 1 22 235 95.25 1 22 225 105.25 1 23 135 230.74 1 22 203 127.25 1 22 231 99.25 1 23 181 184.74 1 22 218 112.25 1 22 239 91.25 1 23 159 206.74 1 22 190 140.25 1 22 226 104.25 1 23 188 177.74 1 22 253 77.25 1 22 211 119.25 1 23 163 202.74 1 22 299 31.25 1 22 272 58.25 1 23 162 203.74 1 22 284 46.25 1 22 231 99.25 1 23 180 185.74 1 22 323 7.25 1 22 265 65.25 1 23 146 219.74 1 22 270 60.25 1 22 219 111.25 1 23 155 210.74 1 22 210 120.25 1 22 200 130.25 1 23 129 236.74 1 22 315 15.25 1 22 257 73.25 1 23 171 194.74 1 22 323 7.25 1 22 206 124.25 1 23 156 209.74 1 22 173 157.25 1 22 231 99.25 1 23 197 168.74 1 22 147 183.25 1 23 195 170.74 1 23 178 187.74 1 22 263 67.25 1 23 191 174.74 1 23 178 187.74 1 22 347 -16.75 -1 23 189 176.74 1 23 113 252.74 1 22 329 1.25 1 23 194 171.74 1 23 125 240.74 1 22 258 72.25 1 23 203 162.74 1 23 151 214.74 1 22 253 77.25 1 23 225 140.74 1 23 189 176.74 1 22 192 138.25 1 23 270 95.74 1 23 200 165.74 1 22 267 63.25 1 23 259 106.74 1 23 160 205.74 1 22 260 70.25 1 23 278 87.74 1 23 200 165.74 1 22 142 188.25 1 23 313 52.74 1 23 189 176.74 1 22 116 214.25 1 23 252 113.74 1 23 199 166.74 1 22 206 124.25 1 23 252 113.74 1 23 175 190.74 1 22 171 159.25 1 23 276 89.74 1 23 284 81.74 1 22 230 100.25 1 23 98 267.74 1 23 274 91.74 1 22 231 99.25 1 23 202 163.74 1 23 247 118.74 1 22 178 152.25 1 23 257 108.74 1 23 264 101.74 1 22 213 117.25 1 23 164 201.74 1 24 322 47.79 1 22 204 126.25 1 23 186 179.74 1 24 209 160.79 1 22 162 168.25 1 23 200 165.74 1 24 314 55.79 1 22 204 126.25 1 23 257 108.74 1 24 185 184.79 1 22 220 110.25 1 23 274 91.74 1 24 171 198.79 1 22 169 161.25 1 23 118 247.74 1 24 169 200.79 1 Page 30 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 24 297 72.79 1 24 139 230.79 1 24 202 167.79 1 24 353 16.79 1 24 142 227.79 1 25 263 120.22 1 24 329 40.79 1 24 144 225.79 1 25 235 148.22 1 24 217 152.79 1 24 106 263.79 1 25 268 115.22 1 24 176 193.79 1 24 123 246.79 1 25 221 162.22 1 24 272 97.79 1 24 164 205.79 1 25 232 151.22 1 24 147 222.79 1 24 143 226.79 1 25 232 151.22 1 24 153 216.79 1 24 162 207.79 1 25 242 141.22 1 24 261 108.79 1 24 170 199.79 1 25 308 75.22 1 24 274 95.79 1 24 173 196.79 1 25 265 118.22 1 24 254 115.79 1 24 176 193.79 1 25 320 63.22 1 24 270 99.79 1 24 171 198.79 1 25 315 68.22 1 24 258 111.79 1 24 178 191.79 1 25 295 88.22 1 24 163 206.79 1 24 179 190.79 1 25 233 150.22 1 24 193 176.79 1 24 202 167.79 1 25 264 119.22 1 24 189 180.79 1 24 214 155.79 1 25 237 146.22 1 24 178 191.79 1 24 184 185.79 1 25 152 231.22 1 24 336 33.79 1 24 153 216.79 1 25 179 204.22 1 24 126 243.79 1 24 162 207.79 1 25 152 231.22 1 24 133 236.79 1 24 155 214.79 1 25 203 180.22 1 24 181 188.79 1 24 185 184.79 1 25 392 -8.78 -1 24 175 194.79 1 24 156 213.79 1 25 363 20.22 1 24 137 232.79 1 24 123 246.79 1 25 403 -19.78 -1 24 114 255.79 1 24 158 211.79 1 25 420 -36.78 -1 24 152 217.79 1 24 219 150.79 1 25 331 52.22 1 24 147 222.79 1 24 166 203.79 1 25 394 -10.78 -1 24 127 242.79 1 24 136 233.79 1 25 372 11.22 1 24 121 248.79 1 24 131 238.79 1 25 374 9.22 1 24 148 221.79 1 24 166 203.79 1 25 399 -15.78 -1 24 134 235.79 1 24 152 217.79 1 25 347 36.22 1 24 127 242.79 1 24 160 209.79 1 25 392 -8.78 -1 24 114 255.79 1 24 254 115.79 1 25 149 234.22 1 24 131 238.79 1 24 248 121.79 1 25 144 239.22 1 24 134 235.79 1 24 192 177.79 1 25 173 210.22 1 24 119 250.79 1 24 206 163.79 1 25 163 220.22 1 24 152 217.79 1 24 161 208.79 1 25 162 221.22 1 24 109 260.79 1 24 232 137.79 1 25 128 255.22 1 24 137 232.79 1 24 223 146.79 1 25 111 272.22 1 24 128 241.79 1 24 202 167.79 1 25 121 262.22 1 Page 31 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 25 176 207.22 1 25 297 86.22 1 26 240 120.90 1 25 161 222.22 1 25 239 144.22 1 26 280 80.90 1 25 148 235.22 1 25 213 170.22 1 26 262 98.90 1 25 141 242.22 1 25 186 197.22 1 26 309 51.90 1 25 127 256.22 1 25 195 188.22 1 26 255 105.90 1 25 166 217.22 1 25 199 184.22 1 26 289 71.90 1 25 152 231.22 1 25 211 172.22 1 26 268 92.90 1 25 158 225.22 1 25 180 203.22 1 26 295 65.90 1 25 189 194.22 1 25 235 148.22 1 26 176 184.90 1 25 117 266.22 1 25 154 229.22 1 26 191 169.90 1 25 148 235.22 1 25 195 188.22 1 26 156 204.90 1 25 128 255.22 1 25 172 211.22 1 26 410 -49.10 -1 25 128 255.22 1 25 166 217.22 1 26 353 7.90 1 25 159 224.22 1 25 232 151.22 1 26 375 -14.10 -1 25 107 276.22 1 25 267 116.22 1 26 364 -3.10 -1 25 80 303.22 1 25 207 176.22 1 26 359 1.90 1 25 68 315.22 1 25 193 190.22 1 26 366 -5.10 -1 25 191 192.22 1 25 182 201.22 1 26 377 -16.10 -1 25 281 102.22 1 25 266 117.22 1 26 392 -31.10 -1 25 236 147.22 1 25 289 94.22 1 26 321 39.90 1 25 254 129.22 1 25 173 210.22 1 26 410 -49.10 -1 25 231 152.22 1 25 192 191.22 1 26 337 23.90 1 25 273 110.22 1 25 191 192.22 1 26 184 176.90 1 25 241 142.22 1 25 231 152.22 1 26 170 190.90 1 25 245 138.22 1 25 292 91.22 1 26 180 180.90 1 25 306 77.22 1 25 231 152.22 1 26 174 186.90 1 25 269 114.22 1 25 237 146.22 1 26 175 185.90 1 25 244 139.22 1 25 239 144.22 1 26 176 184.90 1 25 219 164.22 1 25 249 134.22 1 26 102 258.90 1 25 223 160.22 1 25 270 113.22 1 26 148 212.90 1 25 262 121.22 1 25 241 142.22 1 26 111 249.90 1 25 243 140.22 1 25 160 223.22 1 26 117 243.90 1 25 238 145.22 1 25 180 203.22 1 26 110 250.90 1 25 258 125.22 1 26 248 112.90 1 26 122 238.90 1 25 267 116.22 1 26 229 131.90 1 26 108 252.90 1 25 247 136.22 1 26 277 83.90 1 26 149 211.90 1 25 259 124.22 1 26 258 102.90 1 26 151 209.90 1 25 267 116.22 1 26 227 133.90 1 26 119 241.90 1 25 263 120.22 1 26 259 101.90 1 26 160 200.90 1 Page 32 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 26 195 165.90 1 26 180 180.90 1 27 221 156.76 1 26 131 229.90 1 26 252 108.90 1 27 233 144.76 1 26 157 203.90 1 26 200 160.90 1 27 247 130.76 1 26 117 243.90 1 26 219 141.90 1 27 236 141.76 1 26 145 215.90 1 26 282 78.90 1 27 194 183.76 1 26 101 259.90 1 26 253 107.90 1 27 268 109.76 1 26 89 271.90 1 26 302 58.90 1 27 221 156.76 1 26 106 254.90 1 26 271 89.90 1 27 210 167.76 1 26 169 191.90 1 26 265 95.90 1 27 238 139.76 1 26 198 162.90 1 26 260 100.90 1 27 204 173.76 1 26 161 199.90 1 26 240 120.90 1 27 275 102.76 1 26 177 183.90 1 26 208 152.90 1 27 252 125.76 1 26 181 179.90 1 26 240 120.90 1 27 181 196.76 1 26 207 153.90 1 26 228 132.90 1 27 203 174.76 1 26 222 138.90 1 26 238 122.90 1 27 129 248.76 1 26 236 124.90 1 26 238 122.90 1 27 163 214.76 1 26 213 147.90 1 26 225 135.90 1 27 108 269.76 1 26 186 174.90 1 26 230 130.90 1 27 141 236.76 1 26 245 115.90 1 26 273 87.90 1 27 123 254.76 1 26 229 131.90 1 26 234 126.90 1 27 132 245.76 1 26 222 138.90 1 27 238 139.76 1 27 161 216.76 1 26 212 148.90 1 27 228 149.76 1 27 130 247.76 1 26 205 155.90 1 27 228 149.76 1 27 159 218.76 1 26 231 129.90 1 27 241 136.76 1 27 109 268.76 1 26 239 121.90 1 27 277 100.76 1 27 138 239.76 1 26 232 128.90 1 27 267 110.76 1 27 147 230.76 1 26 231 129.90 1 27 243 134.76 1 27 122 255.76 1 26 228 132.90 1 27 307 70.76 1 27 156 221.76 1 26 221 139.90 1 27 264 113.76 1 27 177 200.76 1 26 199 161.90 1 27 272 105.76 1 27 157 220.76 1 26 235 125.90 1 27 256 121.76 1 27 195 182.76 1 26 196 164.90 1 27 252 125.76 1 27 150 227.76 1 26 198 162.90 1 27 253 124.76 1 27 173 204.76 1 26 169 191.90 1 27 283 94.76 1 27 192 185.76 1 26 203 157.90 1 27 223 154.76 1 27 202 175.76 1 26 169 191.90 1 27 257 120.76 1 27 162 215.76 1 26 204 156.90 1 27 213 164.76 1 27 161 216.76 1 26 172 188.90 1 27 254 123.76 1 27 173 204.76 1 26 240 120.90 1 27 270 107.76 1 27 143 234.76 1 Page 33 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 27 158 219.76 1 28 330 239.22 1 28 214 355.22 1 27 175 202.76 1 28 276 293.22 1 28 146 423.22 1 27 175 202.76 1 28 250 319.22 1 28 252 317.22 1 27 148 229.76 1 28 348 221.22 1 29 251 157.09 1 27 141 236.76 1 28 221 348.22 1 29 242 166.09 1 27 173 204.76 1 28 267 302.22 1 29 262 146.09 1 27 210 167.76 1 28 295 274.22 1 29 245 163.09 1 27 194 183.76 1 28 318 251.22 1 29 275 133.09 1 27 181 196.76 1 28 227 342.22 1 29 283 125.09 1 27 142 235.76 1 28 213 356.22 1 29 326 82.09 1 27 158 219.76 1 28 175 394.22 1 29 334 74.09 1 27 149 228.76 1 28 154 415.22 1 29 292 116.09 1 27 221 156.76 1 28 141 428.22 1 29 270 138.09 1 27 203 174.76 1 28 151 418.22 1 29 247 161.09 1 27 204 173.76 1 28 174 395.22 1 29 262 146.09 1 27 139 238.76 1 28 188 381.22 1 29 315 93.09 1 27 159 218.76 1 28 218 351.22 1 29 323 85.09 1 27 183 194.76 1 28 204 365.22 1 29 270 138.09 1 27 169 208.76 1 28 202 367.22 1 29 310 98.09 1 27 274 103.76 1 28 241 328.22 1 29 312 96.09 1 27 188 189.76 1 28 188 381.22 1 29 337 71.09 1 27 215 162.76 1 28 168 401.22 1 29 298 110.09 1 27 222 155.76 1 28 104 465.22 1 29 285 123.09 1 27 405 -27.24 -1 28 139 430.22 1 29 303 105.09 1 27 247 130.76 1 28 154 415.22 1 29 144 264.09 1 27 203 174.76 1 28 193 376.22 1 29 313 95.09 1 28 280 289.22 1 28 205 364.22 1 29 241 167.09 1 28 222 347.22 1 28 232 337.22 1 29 225 183.09 1 28 265 304.22 1 28 238 331.22 1 29 330 78.09 1 28 248 321.22 1 28 191 378.22 1 29 268 140.09 1 28 292 277.22 1 28 151 418.22 1 29 284 124.09 1 28 270 299.22 1 28 222 347.22 1 29 254 154.09 1 28 304 265.22 1 28 254 315.22 1 29 349 59.09 1 28 275 294.22 1 28 193 376.22 1 29 312 96.09 1 28 383 186.22 1 28 329 240.22 1 29 274 134.09 1 28 212 357.22 1 28 229 340.22 1 29 266 142.09 1 28 359 210.22 1 28 296 273.22 1 29 261 147.09 1 28 310 259.22 1 28 274 295.22 1 29 384 24.09 1 28 269 300.22 1 28 265 304.22 1 29 506 -97.91 -1 Page 34 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 29 355 53.09 1 30 251 333.81 1 30 176 408.81 1 29 123 285.09 1 30 291 293.81 1 30 202 382.81 1 29 132 276.09 1 30 240 344.81 1 30 153 431.81 1 29 137 271.09 1 30 276 308.81 1 30 165 419.81 1 29 144 264.09 1 30 251 333.81 1 30 123 461.81 1 29 153 255.09 1 30 253 331.81 1 30 131 453.81 1 29 157 251.09 1 30 270 314.81 1 30 159 425.81 1 29 158 250.09 1 30 529 55.81 1 30 142 442.81 1 29 151 257.09 1 30 671 -86.19 -1 30 151 433.81 1 29 170 238.09 1 30 644 -59.19 -1 30 107 477.81 1 29 174 234.09 1 30 587 -2.19 -1 30 147 437.81 1 29 179 229.09 1 30 519 65.81 1 30 185 399.81 1 29 195 213.09 1 30 292 292.81 1 30 156 428.81 1 29 163 245.09 1 30 252 332.81 1 30 143 441.81 1 29 162 246.09 1 30 274 310.81 1 30 133 451.81 1 29 143 265.09 1 30 290 294.81 1 30 152 432.81 1 29 168 240.09 1 30 246 338.81 1 30 125 459.81 1 29 128 280.09 1 30 268 316.81 1 30 127 457.81 1 29 140 268.09 1 30 270 314.81 1 30 147 437.81 1 29 142 266.09 1 30 386 198.81 1 30 173 411.81 1 29 167 241.09 1 30 296 288.81 1 30 248 336.81 1 29 133 275.09 1 30 266 318.81 1 30 220 364.81 1 29 139 269.09 1 30 236 348.81 1 31 235 243.04 1 29 175 233.09 1 30 161 423.81 1 31 286 192.04 1 29 162 246.09 1 30 174 410.81 1 31 239 239.04 1 29 308 100.09 1 30 133 451.81 1 31 288 190.04 1 29 293 115.09 1 30 202 382.81 1 31 241 237.04 1 29 267 141.09 1 30 229 355.81 1 31 254 224.04 1 29 272 136.09 1 30 224 360.81 1 31 273 205.04 1 29 306 102.09 1 30 150 434.81 1 31 291 187.04 1 29 303 105.09 1 30 188 396.81 1 31 276 202.04 1 29 223 185.09 1 30 139 445.81 1 31 294 184.04 1 29 259 149.09 1 30 172 412.81 1 31 232 246.04 1 29 179 229.09 1 30 171 413.81 1 31 153 325.04 1 29 184 224.09 1 30 171 413.81 1 31 193 285.04 1 30 313 271.81 1 30 192 392.81 1 31 228 250.04 1 30 281 303.81 1 30 139 445.81 1 31 316 162.04 1 30 278 306.81 1 30 147 437.81 1 31 279 199.04 1 30 316 268.81 1 30 180 404.81 1 31 169 309.04 1 Page 35 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 31 260 218.04 1 32 137 229.11 1 32 266 100.11 1 31 268 210.04 1 32 156 210.11 1 32 229 137.11 1 31 219 259.04 1 32 145 221.11 1 32 237 129.11 1 31 180 298.04 1 32 126 240.11 1 32 245 121.11 1 31 343 135.04 1 32 115 251.11 1 32 217 149.11 1 31 189 289.04 1 32 181 185.11 1 32 246 120.11 1 31 296 182.04 1 32 146 220.11 1 33 277 167.30 1 31 261 217.04 1 32 124 242.11 1 33 260 184.30 1 31 163 315.04 1 32 230 136.11 1 33 280 164.30 1 31 289 189.04 1 32 229 137.11 1 33 279 165.30 1 31 212 266.04 1 32 217 149.11 1 33 275 169.30 1 31 207 271.04 1 32 202 164.11 1 33 254 190.30 1 31 156 322.04 1 32 234 132.11 1 33 332 112.30 1 31 146 332.04 1 32 206 160.11 1 33 271 173.30 1 31 159 319.04 1 32 242 124.11 1 33 254 190.30 1 31 126 352.04 1 32 188 178.11 1 33 252 192.30 1 31 130 348.04 1 32 187 179.11 1 33 299 145.30 1 31 115 363.04 1 32 236 130.11 1 33 288 156.30 1 32 234 132.11 1 32 216 150.11 1 33 295 149.30 1 32 252 114.11 1 32 168 198.11 1 33 295 149.30 1 32 280 86.11 1 32 200 166.11 1 33 280 164.30 1 32 278 88.11 1 32 187 179.11 1 33 296 148.30 1 32 281 85.11 1 32 173 193.11 1 33 307 137.30 1 32 265 101.11 1 32 194 172.11 1 33 304 140.30 1 32 262 104.11 1 32 171 195.11 1 33 283 161.30 1 32 260 106.11 1 32 204 162.11 1 33 305 139.30 1 32 283 83.11 1 32 181 185.11 1 33 130 314.30 1 32 283 83.11 1 32 202 164.11 1 33 137 307.30 1 32 258 108.11 1 32 182 184.11 1 33 169 275.30 1 32 261 105.11 1 32 255 111.11 1 33 174 270.30 1 32 264 102.11 1 32 174 192.11 1 33 179 265.30 1 32 234 132.11 1 32 203 163.11 1 33 181 263.30 1 32 255 111.11 1 32 156 210.11 1 33 158 286.30 1 32 283 83.11 1 32 204 162.11 1 33 136 308.30 1 32 299 67.11 1 32 184 182.11 1 33 176 268.30 1 32 319 47.11 1 32 192 174.11 1 33 223 221.30 1 32 317 49.11 1 32 231 135.11 1 33 191 253.30 1 32 285 81.11 1 32 276 90.11 1 33 195 249.30 1 32 244 122.11 1 32 267 99.11 1 33 166 278.30 1 Page 36 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 33 286 158.30 1 34 233 90.65 1 34 215 108.65 1 33 165 279.30 1 34 259 64.65 1 34 184 139.65 1 33 219 225.30 1 34 260 63.65 1 34 194 129.65 1 33 222 222.30 1 34 258 65.65 1 34 186 137.65 1 33 217 227.30 1 34 258 65.65 1 34 171 152.65 1 33 219 225.30 1 34 144 179.65 1 34 192 131.65 1 33 191 253.30 1 34 165 158.65 1 34 177 146.65 1 33 197 247.30 1 34 242 81.65 1 34 241 82.65 1 33 224 220.30 1 34 271 52.65 1 34 223 100.65 1 33 206 238.30 1 34 285 38.65 1 34 222 101.65 1 33 230 214.30 1 34 261 62.65 1 34 211 112.65 1 33 189 255.30 1 34 286 37.65 1 34 215 108.65 1 33 210 234.30 1 34 341 -17.35 -1 34 189 134.65 1 33 189 255.30 1 34 158 165.65 1 34 175 148.65 1 33 207 237.30 1 34 245 78.65 1 34 176 147.65 1 33 207 237.30 1 34 160 163.65 1 34 159 164.65 1 33 218 226.30 1 34 123 200.65 1 34 170 153.65 1 33 207 237.30 1 34 177 146.65 1 34 164 159.65 1 33 187 257.30 1 34 157 166.65 1 34 176 147.65 1 33 198 246.30 1 34 128 195.65 1 34 170 153.65 1 33 189 255.30 1 34 120 203.65 1 34 190 133.65 1 33 215 229.30 1 34 124 199.65 1 34 240 83.65 1 33 198 246.30 1 34 102 221.65 1 34 227 96.65 1 33 193 251.30 1 34 143 180.65 1 34 226 97.65 1 33 192 252.30 1 34 118 205.65 1 34 211 112.65 1 33 163 281.30 1 34 115 208.65 1 34 216 107.65 1 33 300 144.30 1 34 145 178.65 1 34 235 88.65 1 33 215 229.30 1 34 123 200.65 1 34 139 184.65 1 33 221 223.30 1 34 135 188.65 1 34 106 217.65 1 33 240 204.30 1 34 108 215.65 1 34 114 209.65 1 33 227 217.30 1 34 201 122.65 1 34 103 220.65 1 33 227 217.30 1 34 185 138.65 1 34 121 202.65 1 33 552 - -1 34 164 159.65 1 34 193 130.65 1 107.70 34 151 172.65 1 34 208 115.65 1 33 226 218.30 1 34 170 153.65 1 34 142 181.65 1 33 276 168.30 1 34 215 108.65 1 34 290 33.65 1 34 264 59.65 1 34 195 128.65 1 34 184 139.65 1 34 320 3.65 1 34 220 103.65 1 34 157 166.65 1 34 279 44.65 1 34 200 123.65 1 34 148 175.65 1 34 265 58.65 1 Page 37 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 34 183 140.65 1 35 194 139.45 1 35 166 167.45 1 34 172 151.65 1 35 166 167.45 1 35 187 146.45 1 35 302 31.45 1 35 203 130.45 1 35 183 150.45 1 35 282 51.45 1 35 206 127.45 1 35 153 180.45 1 35 249 84.45 1 35 178 155.45 1 35 287 46.45 1 35 274 59.45 1 35 176 157.45 1 36 118 255.12 1 35 235 98.45 1 35 179 154.45 1 36 184 189.12 1 35 265 68.45 1 35 206 127.45 1 36 287 86.12 1 35 274 59.45 1 35 196 137.45 1 36 297 76.12 1 35 249 84.45 1 35 191 142.45 1 36 372 1.12 1 35 244 89.45 1 35 189 144.45 1 36 277 96.12 1 35 141 192.45 1 35 184 149.45 1 36 288 85.12 1 35 170 163.45 1 35 216 117.45 1 36 248 125.12 1 35 295 38.45 1 35 228 105.45 1 36 267 106.12 1 35 242 91.45 1 35 197 136.45 1 36 304 69.12 1 35 294 39.45 1 35 201 132.45 1 36 325 48.12 1 35 305 28.45 1 35 198 135.45 1 36 163 210.12 1 35 279 54.45 1 35 191 142.45 1 36 252 121.12 1 35 298 35.45 1 35 198 135.45 1 36 306 67.12 1 35 178 155.45 1 35 181 152.45 1 36 267 106.12 1 35 145 188.45 1 35 187 146.45 1 36 193 180.12 1 35 155 178.45 1 35 183 150.45 1 36 188 185.12 1 35 127 206.45 1 35 159 174.45 1 36 199 174.12 1 35 145 188.45 1 35 167 166.45 1 36 248 125.12 1 35 176 157.45 1 35 222 111.45 1 36 294 79.12 1 35 120 213.45 1 35 186 147.45 1 36 290 83.12 1 35 145 188.45 1 35 182 151.45 1 36 349 24.12 1 35 124 209.45 1 35 110 223.45 1 36 227 146.12 1 35 136 197.45 1 35 132 201.45 1 36 266 107.12 1 35 144 189.45 1 35 136 197.45 1 36 215 158.12 1 35 110 223.45 1 35 118 215.45 1 36 272 101.12 1 35 137 196.45 1 35 102 231.45 1 36 250 123.12 1 35 139 194.45 1 35 213 120.45 1 36 154 219.12 1 35 119 214.45 1 35 197 136.45 1 36 106 267.12 1 35 131 202.45 1 35 199 134.45 1 36 176 197.12 1 35 112 221.45 1 35 155 178.45 1 36 167 206.12 1 35 196 137.45 1 35 154 179.45 1 36 262 111.12 1 35 194 139.45 1 35 172 161.45 1 36 252 121.12 1 35 187 146.45 1 35 179 154.45 1 36 282 91.12 1 Page 38 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 36 136 237.12 1 37 302 143.09 1 37 177 268.09 1 36 166 207.12 1 37 312 133.09 1 37 121 324.09 1 36 152 221.12 1 37 142 303.09 1 37 109 336.09 1 36 189 184.12 1 37 274 171.09 1 37 143 302.09 1 36 308 65.12 1 37 275 170.09 1 37 145 300.09 1 36 293 80.12 1 37 299 146.09 1 37 226 219.09 1 36 168 205.12 1 37 294 151.09 1 38 266 137.82 1 36 368 5.12 1 37 249 196.09 1 38 284 119.82 1 36 387 -13.88 -1 37 297 148.09 1 38 263 140.82 1 36 178 195.12 1 37 327 118.09 1 38 278 125.82 1 36 197 176.12 1 37 289 156.09 1 38 269 134.82 1 36 172 201.12 1 37 251 194.09 1 38 266 137.82 1 36 218 155.12 1 37 266 179.09 1 38 280 123.82 1 36 245 128.12 1 37 208 237.09 1 38 268 135.82 1 36 286 87.12 1 37 172 273.09 1 38 260 143.82 1 36 230 143.12 1 37 144 301.09 1 38 244 159.82 1 36 231 142.12 1 37 150 295.09 1 38 271 132.82 1 36 232 141.12 1 37 219 226.09 1 38 224 179.82 1 36 230 143.12 1 37 217 228.09 1 38 322 81.82 1 36 239 134.12 1 37 168 277.09 1 38 267 136.82 1 36 287 86.12 1 37 146 299.09 1 38 208 195.82 1 36 280 93.12 1 37 146 299.09 1 38 211 192.82 1 36 251 122.12 1 37 149 296.09 1 38 176 227.82 1 36 191 182.12 1 37 171 274.09 1 38 216 187.82 1 36 238 135.12 1 37 160 285.09 1 38 323 80.82 1 36 315 58.12 1 37 158 287.09 1 38 339 64.82 1 36 238 135.12 1 37 173 272.09 1 38 189 214.82 1 37 221 224.09 1 37 160 285.09 1 38 167 236.82 1 37 218 227.09 1 37 142 303.09 1 38 172 231.82 1 37 191 254.09 1 37 135 310.09 1 38 180 223.82 1 37 243 202.09 1 37 152 293.09 1 38 210 193.82 1 37 273 172.09 1 37 210 235.09 1 38 191 212.82 1 37 282 163.09 1 37 229 216.09 1 38 452 -48.18 -1 37 268 177.09 1 37 192 253.09 1 38 313 90.82 1 37 290 155.09 1 37 125 320.09 1 38 310 93.82 1 37 396 49.09 1 37 169 276.09 1 38 240 163.82 1 37 294 151.09 1 37 165 280.09 1 38 259 144.82 1 37 430 15.09 1 37 158 287.09 1 38 159 244.82 1 37 369 76.09 1 37 128 317.09 1 38 179 224.82 1 Page 39 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 38 272 131.82 1 39 210 130.65 1 40 171 211.43 1 38 290 113.82 1 39 181 159.65 1 41 380 62.77 1 38 208 195.82 1 39 175 165.65 1 41 315 127.77 1 38 216 187.82 1 39 131 209.65 1 41 272 170.77 1 38 217 186.82 1 39 186 154.65 1 41 309 133.77 1 38 134 269.82 1 39 181 159.65 1 41 306 136.77 1 38 168 235.82 1 39 193 147.65 1 41 326 116.77 1 38 213 190.82 1 39 215 125.65 1 41 308 134.77 1 38 141 262.82 1 39 171 169.65 1 41 243 199.77 1 38 132 271.82 1 39 150 190.65 1 41 255 187.77 1 38 142 261.82 1 39 165 175.65 1 41 419 23.77 1 38 182 221.82 1 39 327 13.65 1 41 407 35.77 1 38 220 183.82 1 40 267 115.43 1 41 387 55.77 1 38 275 128.82 1 40 287 95.43 1 41 415 27.77 1 38 231 172.82 1 40 300 82.43 1 41 309 133.77 1 38 236 167.82 1 40 297 85.43 1 41 280 162.77 1 38 227 176.82 1 40 272 110.43 1 41 199 243.77 1 38 226 177.82 1 40 294 88.43 1 41 176 266.77 1 38 143 260.82 1 40 261 121.43 1 41 170 272.77 1 38 162 241.82 1 40 277 105.43 1 41 139 303.77 1 38 214 189.82 1 40 265 117.43 1 41 147 295.77 1 38 155 248.82 1 40 265 117.43 1 41 198 244.77 1 38 175 228.82 1 40 304 78.43 1 41 123 319.77 1 39 305 35.65 1 40 277 105.43 1 41 118 324.77 1 39 309 31.65 1 40 122 260.43 1 41 180 262.77 1 39 179 161.65 1 40 139 243.43 1 41 135 307.77 1 39 308 32.65 1 40 144 238.43 1 41 136 306.77 1 39 285 55.65 1 40 150 232.43 1 41 129 313.77 1 39 268 72.65 1 40 139 243.43 1 41 169 273.77 1 39 313 27.65 1 40 147 235.43 1 41 143 299.77 1 39 309 31.65 1 40 171 211.43 1 41 181 261.77 1 39 299 41.65 1 40 158 224.43 1 41 124 318.77 1 39 298 42.65 1 40 170 212.43 1 41 190 252.77 1 39 301 39.65 1 40 161 221.43 1 41 155 287.77 1 39 262 78.65 1 40 177 205.43 1 41 125 317.77 1 39 178 162.65 1 40 147 235.43 1 41 216 226.77 1 39 164 176.65 1 40 136 246.43 1 41 206 236.77 1 39 180 160.65 1 40 170 212.43 1 41 199 243.77 1 39 228 112.65 1 40 171 211.43 1 41 305 137.77 1 Page 40 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 41 333 109.77 1 42 334 118.27 1 43 296 122.01 1 41 306 136.77 1 42 317 135.27 1 43 304 114.01 1 41 262 180.77 1 42 343 109.27 1 43 290 128.01 1 41 208 234.77 1 42 366 86.27 1 43 151 267.01 1 41 256 186.77 1 42 280 172.27 1 43 213 205.01 1 41 306 136.77 1 42 319 133.27 1 43 287 131.01 1 41 161 281.77 1 42 271 181.27 1 43 229 189.01 1 41 159 283.77 1 42 299 153.27 1 43 386 32.01 1 41 237 205.77 1 42 267 185.27 1 43 337 81.01 1 41 203 239.77 1 42 249 203.27 1 43 332 86.01 1 41 243 199.77 1 42 297 155.27 1 43 334 84.01 1 41 167 275.77 1 42 224 228.27 1 43 207 211.01 1 41 265 177.77 1 42 260 192.27 1 43 178 240.01 1 41 349 93.77 1 42 217 235.27 1 43 158 260.01 1 41 354 88.77 1 42 234 218.27 1 43 171 247.01 1 41 319 123.77 1 42 257 195.27 1 43 121 297.01 1 41 313 129.77 1 42 217 235.27 1 43 153 265.01 1 41 324 118.77 1 42 244 208.27 1 43 155 263.01 1 41 325 117.77 1 42 422 30.27 1 43 179 239.01 1 41 298 144.77 1 42 224 228.27 1 43 117 301.01 1 41 323 119.77 1 42 282 170.27 1 43 148 270.01 1 41 311 131.77 1 42 427 25.27 1 43 129 289.01 1 41 338 104.77 1 42 240 212.27 1 43 145 273.01 1 41 301 141.77 1 42 343 109.27 1 43 154 264.01 1 41 326 116.77 1 42 354 98.27 1 43 138 280.01 1 41 294 148.77 1 42 366 86.27 1 43 277 141.01 1 41 301 141.77 1 42 313 139.27 1 43 301 117.01 1 41 299 143.77 1 42 210 242.27 1 43 288 130.01 1 41 299 143.77 1 42 370 82.27 1 43 321 97.01 1 41 104 338.77 1 42 365 87.27 1 43 252 166.01 1 41 137 305.77 1 42 356 96.27 1 43 222 196.01 1 41 122 320.77 1 42 341 111.27 1 43 177 241.01 1 41 155 287.77 1 42 286 166.27 1 43 154 264.01 1 41 138 304.77 1 42 283 169.27 1 43 145 273.01 1 41 134 308.77 1 42 335 117.27 1 43 135 283.01 1 41 172 270.77 1 42 405 47.27 1 43 145 273.01 1 41 192 250.77 1 42 345 107.27 1 43 173 245.01 1 42 337 115.27 1 43 280 138.01 1 43 154 264.01 1 42 360 92.27 1 43 322 96.01 1 43 141 277.01 1 Page 41 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 43 148 270.01 1 44 311 93.50 1 45 315 119.24 1 43 192 226.01 1 44 329 75.50 1 45 319 115.24 1 43 154 264.01 1 44 311 93.50 1 45 260 174.24 1 43 143 275.01 1 44 249 155.50 1 45 312 122.24 1 43 220 198.01 1 44 261 143.50 1 45 298 136.24 1 43 160 258.01 1 44 321 83.50 1 45 254 180.24 1 43 263 155.01 1 44 299 105.50 1 45 221 213.24 1 43 175 243.01 1 44 320 84.50 1 45 246 188.24 1 44 353 51.50 1 44 331 73.50 1 45 215 219.24 1 44 324 80.50 1 44 269 135.50 1 45 349 85.24 1 44 347 57.50 1 44 315 89.50 1 45 432 2.24 1 44 287 117.50 1 44 240 164.50 1 45 169 265.24 1 44 336 68.50 1 44 247 157.50 1 45 133 301.24 1 44 340 64.50 1 44 356 48.50 1 45 134 300.24 1 44 358 46.50 1 44 306 98.50 1 45 132 302.24 1 44 382 22.50 1 44 292 112.50 1 45 147 287.24 1 44 333 71.50 1 44 318 86.50 1 45 184 250.24 1 44 214 190.50 1 44 356 48.50 1 45 173 261.24 1 44 167 237.50 1 44 381 23.50 1 45 174 260.24 1 44 192 212.50 1 44 369 35.50 1 45 162 272.24 1 44 194 210.50 1 44 338 66.50 1 45 172 262.24 1 44 322 82.50 1 44 359 45.50 1 45 182 252.24 1 44 354 50.50 1 44 425 -20.50 -1 45 169 265.24 1 44 329 75.50 1 44 164 240.50 1 45 166 268.24 1 44 305 99.50 1 44 196 208.50 1 45 181 253.24 1 44 180 224.50 1 44 182 222.50 1 45 160 274.24 1 44 291 113.50 1 44 175 229.50 1 45 185 249.24 1 44 360 44.50 1 44 203 201.50 1 45 182 252.24 1 44 295 109.50 1 44 282 122.50 1 45 172 262.24 1 44 366 38.50 1 44 379 25.50 1 45 281 153.24 1 44 203 201.50 1 44 200 204.50 1 45 162 272.24 1 44 170 234.50 1 44 294 110.50 1 45 184 250.24 1 44 333 71.50 1 44 330 74.50 1 45 192 242.24 1 44 311 93.50 1 44 870 - -1 45 191 243.24 1 44 288 116.50 1 465.50 45 232 202.24 1 44 333 71.50 1 44 207 197.50 1 45 182 252.24 1 44 337 67.50 1 44 267 137.50 1 45 173 261.24 1 44 379 25.50 1 44 290 114.50 1 45 188 246.24 1 44 269 135.50 1 44 251 153.50 1 45 174 260.24 1 44 236 168.50 1 Page 42 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 45 189 245.24 1 45 240 194.24 1 46 104 331.45 1 45 161 273.24 1 45 285 149.24 1 46 137 298.45 1 45 196 238.24 1 45 235 199.24 1 46 172 263.45 1 45 269 165.24 1 45 250 184.24 1 46 122 313.45 1 45 156 278.24 1 46 334 101.45 1 46 134 301.45 1 45 145 289.24 1 46 364 71.45 1 46 324 111.45 1 45 158 276.24 1 46 325 110.45 1 46 284 151.45 1 45 281 153.24 1 46 330 105.45 1 46 310 125.45 1 45 297 137.24 1 46 348 87.45 1 46 293 142.45 1 45 306 128.24 1 46 350 85.45 1 46 278 157.45 1 45 293 141.24 1 46 325 110.45 1 47 989 - -1 45 165 269.24 1 46 331 104.45 1 522.61 45 150 284.24 1 46 374 61.45 1 47 1035 - -1 568.61 45 198 236.24 1 46 343 92.45 1 47 1023 - -1 45 206 228.24 1 46 342 93.45 1 556.61 45 175 259.24 1 46 318 117.45 1 47 377 89.39 1 45 174 260.24 1 46 323 112.45 1 47 365 101.39 1 45 206 228.24 1 46 288 147.45 1 47 371 95.39 1 45 223 211.24 1 46 285 150.45 1 47 422 44.39 1 45 170 264.24 1 46 277 158.45 1 47 411 55.39 1 45 173 261.24 1 46 275 160.45 1 47 362 104.39 1 45 285 149.24 1 46 220 215.45 1 47 162 304.39 1 45 232 202.24 1 46 190 245.45 1 47 201 265.39 1 45 142 292.24 1 46 199 236.45 1 47 195 271.39 1 45 161 273.24 1 46 306 129.45 1 47 179 287.39 1 45 232 202.24 1 46 287 148.45 1 47 203 263.39 1 45 420 14.24 1 46 202 233.45 1 47 235 231.39 1 45 445 -10.76 -1 46 333 102.45 1 47 239 227.39 1 45 137 297.24 1 46 426 9.45 1 47 134 332.39 1 45 142 292.24 1 46 419 16.45 1 47 237 229.39 1 45 298 136.24 1 46 397 38.45 1 47 140 326.39 1 45 291 143.24 1 46 361 74.45 1 47 108 358.39 1 45 255 179.24 1 46 391 44.45 1 47 131 335.39 1 45 248 186.24 1 46 352 83.45 1 47 220 246.39 1 45 219 215.24 1 46 355 80.45 1 47 206 260.39 1 45 254 180.24 1 46 343 92.45 1 47 133 333.39 1 45 278 156.24 1 46 138 297.45 1 47 222 244.39 1 45 241 193.24 1 46 155 280.45 1 47 194 272.39 1 45 245 189.24 1 46 192 243.45 1 47 125 341.39 1 Page 43 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 47 184 282.39 1 48 246 244.93 1 49 169 229.43 1 47 160 306.39 1 48 238 252.93 1 49 132 266.43 1 47 156 310.39 1 48 215 275.93 1 49 177 221.43 1 47 185 281.39 1 48 227 263.93 1 49 147 251.43 1 47 163 303.39 1 48 303 187.93 1 49 137 261.43 1 47 296 170.39 1 48 310 180.93 1 49 261 137.43 1 47 361 105.39 1 48 248 242.93 1 49 266 132.43 1 47 329 137.39 1 48 255 235.93 1 49 229 169.43 1 47 342 124.39 1 49 344 54.43 1 49 248 150.43 1 47 329 137.39 1 49 184 214.43 1 49 237 161.43 1 47 282 184.39 1 49 199 199.43 1 49 241 157.43 1 48 307 183.93 1 49 191 207.43 1 49 207 191.43 1 48 280 210.93 1 49 181 217.43 1 49 159 239.43 1 48 327 163.93 1 49 251 147.43 1 49 202 196.43 1 48 360 130.93 1 49 285 113.43 1 49 154 244.43 1 48 433 57.93 1 49 326 72.43 1 49 153 245.43 1 48 510 -19.07 -1 49 192 206.43 1 49 212 186.43 1 48 429 61.93 1 49 129 269.43 1 49 129 269.43 1 48 518 -27.07 -1 49 160 238.43 1 49 148 250.43 1 48 388 102.93 1 49 178 220.43 1 49 147 251.43 1 48 174 316.93 1 49 217 181.43 1 49 212 186.43 1 48 193 297.93 1 49 231 167.43 1 49 246 152.43 1 48 266 224.93 1 49 267 131.43 1 49 228 170.43 1 48 328 162.93 1 49 253 145.43 1 49 207 191.43 1 48 317 173.93 1 49 322 76.43 1 49 189 209.43 1 48 139 351.93 1 49 305 93.43 1 49 219 179.43 1 48 239 251.93 1 49 177 221.43 1 49 205 193.43 1 48 175 315.93 1 49 306 92.43 1 49 203 195.43 1 48 192 298.93 1 49 180 218.43 1 49 241 157.43 1 48 192 298.93 1 49 156 242.43 1 49 217 181.43 1 48 201 289.93 1 49 166 232.43 1 49 234 164.43 1 48 127 363.93 1 49 327 71.43 1 49 232 166.43 1 48 217 273.93 1 49 191 207.43 1 49 220 178.43 1 48 195 295.93 1 49 163 235.43 1 49 189 209.43 1 48 190 300.93 1 49 148 250.43 1 49 177 221.43 1 48 195 295.93 1 49 157 241.43 1 49 159 239.43 1 48 245 245.93 1 49 146 252.43 1 49 192 206.43 1 48 207 283.93 1 49 210 188.43 1 49 202 196.43 1 48 164 326.93 1 49 206 192.43 1 49 161 237.43 1 Page 44 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 49 205 193.43 1 50 192 158.71 1 51 320 434.77 1 49 214 184.43 1 50 129 221.71 1 51 332 422.77 1 49 208 190.43 1 50 120 230.71 1 51 327 427.77 1 49 200 198.43 1 50 166 184.71 1 51 329 425.77 1 49 192 206.43 1 50 168 182.71 1 51 317 437.77 1 49 193 205.43 1 50 163 187.71 1 51 310 444.77 1 49 233 165.43 1 50 141 209.71 1 51 311 443.77 1 49 180 218.43 1 50 144 206.71 1 51 286 468.77 1 49 194 204.43 1 50 226 124.71 1 51 206 548.77 1 49 191 207.43 1 50 205 145.71 1 51 208 546.77 1 49 195 203.43 1 50 201 149.71 1 51 223 531.77 1 49 168 230.43 1 50 217 133.71 1 51 248 506.77 1 50 180 170.71 1 50 225 125.71 1 51 161 593.77 1 50 169 181.71 1 50 194 156.71 1 51 394 360.77 1 50 175 175.71 1 50 222 128.71 1 51 282 472.77 1 50 164 186.71 1 50 174 176.71 1 51 229 525.77 1 50 173 177.71 1 50 179 171.71 1 51 240 514.77 1 50 170 180.71 1 50 162 188.71 1 51 188 566.77 1 50 153 197.71 1 50 178 172.71 1 51 157 597.77 1 50 179 171.71 1 50 193 157.71 1 51 155 599.77 1 50 179 171.71 1 50 180 170.71 1 51 184 570.77 1 50 157 193.71 1 50 192 158.71 1 51 192 562.77 1 50 172 178.71 1 50 182 168.71 1 51 199 555.77 1 50 185 165.71 1 50 178 172.71 1 51 186 568.77 1 50 306 44.71 1 50 203 147.71 1 51 204 550.77 1 50 286 64.71 1 50 213 137.71 1 51 329 425.77 1 50 292 58.71 1 50 182 168.71 1 51 453 301.77 1 50 293 57.71 1 50 217 133.71 1 51 341 413.77 1 50 139 211.71 1 50 223 127.71 1 51 414 340.77 1 50 167 183.71 1 50 182 168.71 1 51 419 335.77 1 50 193 157.71 1 50 220 130.71 1 51 421 333.77 1 50 172 178.71 1 50 226 124.71 1 51 355 399.77 1 50 179 171.71 1 50 211 139.71 1 51 343 411.77 1 50 336 14.71 1 50 191 159.71 1 51 422 332.77 1 50 330 20.71 1 50 187 163.71 1 51 453 301.77 1 50 155 195.71 1 50 199 151.71 1 51 204 550.77 1 50 166 184.71 1 50 226 124.71 1 51 263 491.77 1 50 158 192.71 1 50 164 186.71 1 51 324 430.77 1 50 206 144.71 1 51 288 466.77 1 51 733 21.77 1 Page 45 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 51 882 - -1 52 192 306.73 1 53 154 345.65 1 127.23 52 142 356.73 1 53 163 336.65 1 51 785 -30.23 -1 52 159 339.73 1 53 157 342.65 1 51 294 460.77 1 52 189 309.73 1 53 167 332.65 1 51 302 452.77 1 52 228 270.73 1 53 311 188.65 1 51 279 475.77 1 52 164 334.73 1 53 347 152.65 1 51 289 465.77 1 52 246 252.73 1 53 352 147.65 1 51 289 465.77 1 52 140 358.73 1 53 362 137.65 1 51 410 344.77 1 52 299 199.73 1 53 378 121.65 1 51 317 437.77 1 52 221 277.73 1 53 208 291.65 1 51 321 433.77 1 52 335 163.73 1 53 180 319.65 1 51 320 434.77 1 52 193 305.73 1 53 223 276.65 1 51 372 382.77 1 52 348 150.73 1 53 161 338.65 1 51 319 435.77 1 52 326 172.73 1 53 198 301.65 1 51 264 490.77 1 52 356 142.73 1 53 180 319.65 1 52 310 188.73 1 52 302 196.73 1 53 310 189.65 1 52 331 167.73 1 52 303 195.73 1 53 177 322.65 1 52 315 183.73 1 52 216 282.73 1 53 169 330.65 1 52 298 200.73 1 52 211 287.73 1 53 211 288.65 1 52 325 173.73 1 52 229 269.73 1 53 149 350.65 1 52 327 171.73 1 52 269 229.73 1 53 145 354.65 1 52 321 177.73 1 52 241 257.73 1 53 158 341.65 1 52 261 237.73 1 52 257 241.73 1 53 167 332.65 1 52 277 221.73 1 52 244 254.73 1 53 158 341.65 1 52 402 96.73 1 52 225 273.73 1 53 186 313.65 1 52 380 118.73 1 52 239 259.73 1 53 176 323.65 1 52 391 107.73 1 52 210 288.73 1 53 220 279.65 1 52 360 138.73 1 53 246 253.65 1 53 184 315.65 1 52 187 311.73 1 53 252 247.65 1 53 253 246.65 1 52 189 309.73 1 53 334 165.65 1 53 196 303.65 1 52 175 323.73 1 53 329 170.65 1 53 193 306.65 1 52 181 317.73 1 53 341 158.65 1 53 185 314.65 1 52 132 366.73 1 53 284 215.65 1 53 231 268.65 1 52 131 367.73 1 53 168 331.65 1 53 447 52.65 1 52 143 355.73 1 53 157 342.65 1 53 503 -3.35 -1 52 191 307.73 1 53 173 326.65 1 53 320 179.65 1 52 159 339.73 1 53 177 322.65 1 53 320 179.65 1 52 153 345.73 1 53 192 307.65 1 54 321 173.62 1 52 188 310.73 1 53 161 338.65 1 54 321 173.62 1 52 151 347.73 1 Page 46 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 54 324 170.62 1 54 316 178.62 1 56 337 82.68 1 54 338 156.62 1 54 328 166.62 1 56 331 88.68 1 54 316 178.62 1 55 266 231.44 1 56 225 194.68 1 54 355 139.62 1 55 268 229.44 1 57 392 39.51 1 54 296 198.62 1 55 281 216.44 1 57 350 81.51 1 54 267 227.62 1 55 273 224.44 1 57 183 248.51 1 54 279 215.62 1 55 349 148.44 1 57 193 238.51 1 54 360 134.62 1 55 351 146.44 1 57 181 250.51 1 54 361 133.62 1 55 303 194.44 1 57 170 261.51 1 54 381 113.62 1 55 258 239.44 1 57 252 179.51 1 54 342 152.62 1 55 363 134.44 1 57 287 144.51 1 54 210 284.62 1 55 338 159.44 1 57 306 125.51 1 54 175 319.62 1 55 313 184.44 1 57 272 159.51 1 54 157 337.62 1 55 357 140.44 1 57 483 -51.49 -1 54 178 316.62 1 55 272 225.44 1 57 330 101.51 1 54 178 316.62 1 55 313 184.44 1 57 392 39.51 1 54 157 337.62 1 55 231 266.44 1 57 299 132.51 1 54 177 317.62 1 55 419 78.44 1 57 201 230.51 1 54 232 262.62 1 55 315 182.44 1 57 219 212.51 1 54 199 295.62 1 55 450 47.44 1 57 215 216.51 1 54 165 329.62 1 55 292 205.44 1 57 252 179.51 1 54 240 254.62 1 55 233 264.44 1 57 282 149.51 1 54 168 326.62 1 56 281 138.68 1 57 220 211.51 1 54 210 284.62 1 56 266 153.68 1 57 167 264.51 1 54 179 315.62 1 56 275 144.68 1 57 215 216.51 1 54 225 269.62 1 56 289 130.68 1 57 406 25.51 1 54 225 269.62 1 56 372 47.68 1 57 188 243.51 1 54 218 276.62 1 56 396 23.68 1 57 197 234.51 1 54 210 284.62 1 56 308 111.68 1 57 243 188.51 1 54 162 332.62 1 56 276 143.68 1 57 218 213.51 1 54 210 284.62 1 56 257 162.68 1 57 189 242.51 1 54 172 322.62 1 56 282 137.68 1 58 265 120.88 1 54 199 295.62 1 56 257 162.68 1 58 275 110.88 1 54 183 311.62 1 56 307 112.68 1 58 205 180.88 1 54 243 251.62 1 56 202 217.68 1 58 214 171.88 1 54 327 167.62 1 56 201 218.68 1 58 367 18.88 1 54 319 175.62 1 56 201 218.68 1 58 202 183.88 1 54 326 168.62 1 56 357 62.68 1 58 219 166.88 1 54 292 202.62 1 56 354 65.68 1 58 155 230.88 1 Page 47 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 58 183 202.88 1 61 184 198.11 1 62 329 159.69 1 58 189 196.88 1 61 133 249.11 1 62 340 148.69 1 58 150 235.88 1 61 255 127.11 1 62 215 273.69 1 58 186 199.88 1 61 200 182.11 1 63 294 148.53 1 58 268 117.88 1 61 259 123.11 1 63 343 99.53 1 58 262 123.88 1 61 241 141.11 1 63 181 261.53 1 58 254 131.88 1 61 207 175.11 1 63 219 223.53 1 59 245 113.09 1 61 174 208.11 1 63 165 277.53 1 59 201 157.09 1 61 199 183.11 1 63 204 238.53 1 59 224 134.09 1 61 209 173.11 1 63 172 270.53 1 59 259 99.09 1 61 302 80.11 1 63 249 193.53 1 59 195 163.09 1 61 353 29.11 1 63 261 181.53 1 59 294 64.09 1 62 194 294.69 1 63 262 180.53 1 59 411 -52.91 -1 62 167 321.69 1 63 288 154.53 1 59 318 40.09 1 62 197 291.69 1 63 285 157.53 1 59 263 95.09 1 62 205 283.69 1 63 339 103.53 1 59 374 -15.91 -1 62 298 190.69 1 63 305 137.53 1 60 217 88.29 1 62 211 277.69 1 63 303 139.53 1 60 197 108.29 1 62 247 241.69 1 63 320 122.53 1 60 316 -10.71 -1 62 267 221.69 1 63 316 126.53 1 60 329 -23.71 -1 62 252 236.69 1 63 327 115.53 1 60 414 - -1 62 251 237.69 1 63 290 152.53 1 108.71 62 253 235.69 1 63 261 181.53 1 60 199 106.29 1 62 375 113.69 1 63 203 239.53 1 60 221 84.29 1 62 350 138.69 1 63 343 99.53 1 60 200 105.29 1 62 365 123.69 1 63 202 240.53 1 60 270 35.29 1 62 307 181.69 1 63 180 262.53 1 60 226 79.29 1 62 189 299.69 1 63 177 265.53 1 60 240 65.29 1 62 275 213.69 1 63 351 91.53 1 60 209 96.29 1 62 268 220.69 1 63 193 249.53 1 60 176 129.29 1 62 472 16.69 1 63 330 112.53 1 60 228 77.29 1 62 267 221.69 1 63 224 218.53 1 61 260 122.11 1 62 274 214.69 1 63 249 193.53 1 61 177 205.11 1 62 223 265.69 1 64 268 279.59 1 61 191 191.11 1 62 470 18.69 1 64 315 232.59 1 61 201 181.11 1 62 371 117.69 1 64 281 266.59 1 61 225 157.11 1 62 389 99.69 1 64 355 192.59 1 61 182 200.11 1 62 350 138.69 1 64 342 205.59 1 61 194 188.11 1 62 341 147.69 1 64 334 213.59 1 61 220 162.11 1 Page 48 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 64 324 223.59 1 67 378 27.27 1 67 333 72.27 1 64 331 216.59 1 67 339 66.27 1 67 324 81.27 1 64 325 222.59 1 67 334 71.27 1 67 318 87.27 1 64 310 237.59 1 67 346 59.27 1 67 349 56.27 1 64 286 261.59 1 67 343 62.27 1 67 344 61.27 1 64 319 228.59 1 67 406 -0.73 -1 67 220 185.27 1 64 313 234.59 1 67 434 -28.73 -1 67 308 97.27 1 64 445 102.59 1 67 399 6.27 1 67 297 108.27 1 65 326 104.20 1 67 419 -13.73 -1 67 177 228.27 1 65 277 153.20 1 67 403 2.27 1 67 333 72.27 1 65 225 205.20 1 67 454 -48.73 -1 67 274 131.27 1 65 269 161.20 1 67 372 33.27 1 67 322 83.27 1 65 291 139.20 1 67 382 23.27 1 67 299 106.27 1 65 285 145.20 1 67 344 61.27 1 67 334 71.27 1 65 319 111.20 1 67 366 39.27 1 67 320 85.27 1 65 185 245.20 1 67 345 60.27 1 67 338 67.27 1 65 332 98.20 1 67 326 79.27 1 67 309 96.27 1 65 316 114.20 1 67 305 100.27 1 67 303 102.27 1 65 344 86.20 1 67 500 -94.73 -1 67 342 63.27 1 65 355 75.20 1 67 495 -89.73 -1 67 268 137.27 1 65 302 128.20 1 67 410 -4.73 -1 67 316 89.27 1 65 369 61.20 1 67 378 27.27 1 67 338 67.27 1 65 302 128.20 1 67 458 -52.73 -1 67 334 71.27 1 65 321 109.20 1 67 416 -10.73 -1 67 329 76.27 1 65 332 98.20 1 67 306 99.27 1 67 300 105.27 1 65 328 102.20 1 67 303 102.27 1 67 337 68.27 1 65 288 142.20 1 67 353 52.27 1 67 292 113.27 1 65 340 90.20 1 67 372 33.27 1 67 304 101.27 1 65 234 196.20 1 67 324 81.27 1 67 324 81.27 1 65 208 222.20 1 67 307 98.27 1 67 293 112.27 1 65 272 158.20 1 67 312 93.27 1 67 286 119.27 1 65 259 171.20 1 67 330 75.27 1 67 209 196.27 1 65 183 247.20 1 67 401 4.27 1 67 278 127.27 1 66 337 118.26 1 67 274 131.27 1 67 236 169.27 1 66 321 134.26 1 67 387 18.27 1 67 220 185.27 1 66 245 210.26 1 67 332 73.27 1 67 250 155.27 1 66 209 246.26 1 67 287 118.27 1 67 277 128.27 1 67 317 88.27 1 67 330 75.27 1 67 254 151.27 1 67 349 56.27 1 67 310 95.27 1 67 273 132.27 1 Page 49 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 67 424 -18.73 -1 68 169 275.75 1 69 283 122.22 1 67 287 118.27 1 68 195 249.75 1 69 278 127.22 1 67 263 142.27 1 68 662 - -1 69 302 103.22 1 68 274 170.75 1 217.25 69 291 114.22 1 68 272 172.75 1 68 236 208.75 1 69 269 136.22 1 68 271 173.75 1 68 395 49.75 1 69 291 114.22 1 68 252 192.75 1 68 254 190.75 1 69 290 115.22 1 68 286 158.75 1 68 224 220.75 1 70 299 141.99 1 68 277 167.75 1 68 302 142.75 1 70 369 71.99 1 68 290 154.75 1 68 264 180.75 1 70 360 80.99 1 68 311 133.75 1 69 278 127.22 1 70 281 159.99 1 68 291 153.75 1 69 232 173.22 1 70 349 91.99 1 68 286 158.75 1 69 271 134.22 1 70 311 129.99 1 68 297 147.75 1 69 246 159.22 1 70 323 117.99 1 68 304 140.75 1 69 225 180.22 1 70 343 97.99 1 68 258 186.75 1 69 258 147.22 1 70 376 64.99 1 68 258 186.75 1 69 253 152.22 1 70 405 35.99 1 68 312 132.75 1 69 318 87.22 1 70 386 54.99 1 68 291 153.75 1 69 299 106.22 1 70 298 142.99 1 68 263 181.75 1 69 285 120.22 1 70 342 98.99 1 68 275 169.75 1 69 298 107.22 1 70 336 104.99 1 68 258 186.75 1 69 367 38.22 1 70 335 105.99 1 68 258 186.75 1 69 355 50.22 1 70 316 124.99 1 68 293 151.75 1 69 275 130.22 1 70 309 131.99 1 68 313 131.75 1 69 241 164.22 1 70 369 71.99 1 68 289 155.75 1 69 244 161.22 1 70 270 170.99 1 68 294 150.75 1 69 223 182.22 1 70 265 175.99 1 68 206 238.75 1 69 235 170.22 1 70 318 122.99 1 68 202 242.75 1 69 284 121.22 1 70 309 131.99 1 68 196 248.75 1 69 226 179.22 1 70 368 72.99 1 68 181 263.75 1 69 357 48.22 1 70 326 114.99 1 68 196 248.75 1 69 243 162.22 1 70 342 98.99 1 68 204 240.75 1 69 258 147.22 1 70 313 127.99 1 68 194 250.75 1 69 272 133.22 1 70 309 131.99 1 68 187 257.75 1 69 249 156.22 1 70 311 129.99 1 68 245 199.75 1 69 203 202.22 1 70 300 140.99 1 68 191 253.75 1 69 240 165.22 1 70 305 135.99 1 68 230 214.75 1 69 327 78.22 1 70 335 105.99 1 68 182 262.75 1 69 308 97.22 1 70 208 232.99 1 69 281 124.22 1 Page 50 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 70 253 187.99 1 70 193 247.99 1 70 267 173.99 1 70 251 189.99 1 70 199 241.99 1 70 227 213.99 1 70 234 206.99 1 70 198 242.99 1 70 242 198.99 1 70 219 221.99 1 70 193 247.99 1 70 235 205.99 1 70 218 222.99 1 70 212 228.99 1 70 224 216.99 1 70 201 239.99 1 70 243 197.99 1 70 240 200.99 1 70 238 202.99 1 70 203 237.99 1 70 205 235.99 1 70 237 203.99 1 70 201 239.99 1 70 235 205.99 1 70 212 228.99 1 70 221 219.99 1 70 238 202.99 1 70 209 231.99 1 70 212 228.99 1 70 245 195.99 1 70 212 228.99 1 70 169 271.99 1 70 241 199.99 1 70 217 223.99 1 70 204 236.99 1 70 231 209.99 1 70 221 219.99 1 70 206 234.99 1 70 254 186.99 1 70 228 212.99 1 70 217 223.99 1 70 233 207.99 1 70 205 235.99 1 70 214 226.99 1 70 261 179.99 1 70 224 216.99 1 70 204 236.99 1 70 260 180.99 1 70 220 220.99 1 70 207 233.99 1 70 211 229.99 1 70 256 184.99 1 70 222 218.99 1 70 238 202.99 1 70 219 221.99 1 70 223 217.99 1 70 269 171.99 1 70 254 186.99 1 70 222 218.99 1 70 237 203.99 1 70 230 210.99 1 70 211 229.99 1 70 229 211.99 1 70 234 206.99 1 70 220 220.99 1 70 236 204.99 1 70 242 198.99 1 70 222 218.99 1 70 209 231.99 1 70 255 185.99 1 70 223 217.99 1 70 196 244.99 1 70 236 204.99 1 70 227 213.99 1 70 217 223.99 1 70 244 196.99 1 70 247 193.99 1 70 200 240.99 1 70 210 230.99 1 70 234 206.99 1 70 205 235.99 1 70 232 208.99 1 70 230 210.99 1 70 192 248.99 1 70 197 243.99 1 70 201 239.99 1 70 214 226.99 1 70 208 232.99 1 70 225 215.99 1 70 210 230.99 1 70 213 227.99 1 70 236 204.99 1 70 200 240.99 1 70 217 223.99 1 70 214 226.99 1 70 216 224.99 1 70 229 211.99 1 70 213 227.99 1 70 234 206.99 1 70 193 247.99 1 70 241 199.99 1 70 219 221.99 1 70 187 253.99 1 70 217 223.99 1 70 251 189.99 1 70 197 243.99 1 70 209 231.99 1 70 233 207.99 1 70 186 254.99 1 70 233 207.99 1 70 239 201.99 1 70 189 251.99 1 70 209 231.99 1 70 255 185.99 1 70 208 232.99 1 70 236 204.99 1 70 245 195.99 1 Page 51 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 70 250 190.99 1 71 318 165.20 1 72 233 377.64 1 70 265 175.99 1 71 349 134.20 1 72 224 386.64 1 70 250 190.99 1 71 240 243.20 1 72 213 397.64 1 70 234 206.99 1 71 459 24.20 1 72 188 422.64 1 70 309 131.99 1 71 379 104.20 1 72 197 413.64 1 70 274 166.99 1 71 411 72.20 1 72 202 408.64 1 70 270 170.99 1 71 339 144.20 1 72 242 368.64 1 70 234 206.99 1 72 304 306.64 1 72 262 348.64 1 71 422 61.20 1 72 278 332.64 1 72 247 363.64 1 71 331 152.20 1 72 268 342.64 1 72 351 259.64 1 71 445 38.20 1 72 278 332.64 1 72 248 362.64 1 71 373 110.20 1 72 287 323.64 1 72 298 312.64 1 71 263 220.20 1 72 282 328.64 1 72 292 318.64 1 71 353 130.20 1 72 302 308.64 1 72 301 309.64 1 71 302 181.20 1 72 235 375.64 1 72 306 304.64 1 71 305 178.20 1 72 272 338.64 1 72 316 294.64 1 71 275 208.20 1 72 386 224.64 1 72 249 361.64 1 71 259 224.20 1 72 315 295.64 1 72 242 368.64 1 71 318 165.20 1 72 307 303.64 1 72 229 381.64 1 71 297 186.20 1 72 264 346.64 1 72 243 367.64 1 71 346 137.20 1 72 264 346.64 1 72 431 179.64 1 71 307 176.20 1 72 601 9.64 1 72 323 287.64 1 71 328 155.20 1 72 235 375.64 1 72 400 210.64 1 71 288 195.20 1 72 260 350.64 1 72 301 309.64 1 71 292 191.20 1 72 257 353.64 1 72 431 179.64 1 71 261 222.20 1 72 202 408.64 1 72 360 250.64 1 71 307 176.20 1 72 195 415.64 1 72 447 163.64 1 71 334 149.20 1 72 231 379.64 1 72 430 180.64 1 71 359 124.20 1 72 345 265.64 1 72 408 202.64 1 71 334 149.20 1 72 358 252.64 1 72 326 284.64 1 71 278 205.20 1 72 298 312.64 1 72 415 195.64 1 71 208 275.20 1 72 291 319.64 1 72 292 318.64 1 71 218 265.20 1 72 215 395.64 1 72 454 156.64 1 71 290 193.20 1 72 187 423.64 1 72 350 260.64 1 71 273 210.20 1 72 196 414.64 1 72 411 199.64 1 71 332 151.20 1 72 571 39.64 1 72 354 256.64 1 71 503 -19.80 -1 72 196 414.64 1 72 435 175.64 1 71 358 125.20 1 72 222 388.64 1 72 361 249.64 1 71 470 13.20 1 72 196 414.64 1 72 466 144.64 1 Page 52 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 72 359 251.64 1 73 249 274.67 1 73 273 250.67 1 72 218 392.64 1 73 384 139.67 1 73 232 291.67 1 72 210 400.64 1 73 508 15.67 1 73 245 278.67 1 72 225 385.64 1 73 282 241.67 1 73 237 286.67 1 72 248 362.64 1 73 255 268.67 1 73 260 263.67 1 72 214 396.64 1 73 319 204.67 1 73 258 265.67 1 72 217 393.64 1 73 297 226.67 1 73 283 240.67 1 72 221 389.64 1 73 329 194.67 1 73 257 266.67 1 72 210 400.64 1 73 280 243.67 1 73 291 232.67 1 72 228 382.64 1 73 249 274.67 1 73 260 263.67 1 72 220 390.64 1 73 259 264.67 1 73 269 254.67 1 72 210 400.64 1 73 309 214.67 1 73 266 257.67 1 72 211 399.64 1 73 309 214.67 1 73 303 220.67 1 72 199 411.64 1 73 314 209.67 1 73 238 285.67 1 72 221 389.64 1 73 272 251.67 1 73 247 276.67 1 72 246 364.64 1 73 299 224.67 1 73 268 255.67 1 72 191 419.64 1 73 309 214.67 1 73 327 196.67 1 72 215 395.64 1 73 282 241.67 1 73 277 246.67 1 72 212 398.64 1 73 333 190.67 1 73 236 287.67 1 72 224 386.64 1 73 343 180.67 1 73 257 266.67 1 72 228 382.64 1 73 352 171.67 1 73 228 295.67 1 72 224 386.64 1 73 285 238.67 1 73 185 338.67 1 72 231 379.64 1 73 382 141.67 1 73 272 251.67 1 72 229 381.64 1 73 388 135.67 1 73 270 253.67 1 72 208 402.64 1 73 320 203.67 1 73 257 266.67 1 72 198 412.64 1 73 342 181.67 1 73 305 218.67 1 72 271 339.64 1 73 254 269.67 1 73 264 259.67 1 72 263 347.64 1 73 309 214.67 1 73 245 278.67 1 72 239 371.64 1 73 241 282.67 1 73 264 259.67 1 72 302 308.64 1 73 232 291.67 1 73 212 311.67 1 72 315 295.64 1 73 301 222.67 1 73 231 292.67 1 72 311 299.64 1 73 273 250.67 1 73 218 305.67 1 72 288 322.64 1 73 243 280.67 1 73 218 305.67 1 72 249 361.64 1 73 250 273.67 1 73 219 304.67 1 72 240 370.64 1 73 247 276.67 1 73 243 280.67 1 73 257 266.67 1 73 236 287.67 1 73 254 269.67 1 73 263 260.67 1 73 244 279.67 1 73 235 288.67 1 73 302 221.67 1 73 254 269.67 1 73 292 231.67 1 73 306 217.67 1 73 245 278.67 1 73 261 262.67 1 Page 53 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 73 245 278.67 1 74 281 389.41 1 74 235 435.41 1 73 271 252.67 1 74 290 380.41 1 74 231 439.41 1 73 212 311.67 1 74 282 388.41 1 74 204 466.41 1 73 218 305.67 1 74 387 283.41 1 74 246 424.41 1 74 439 231.41 1 74 218 452.41 1 74 222 448.41 1 74 380 290.41 1 74 241 429.41 1 74 218 452.41 1 74 420 250.41 1 74 203 467.41 1 74 228 442.41 1 74 371 299.41 1 74 269 401.41 1 74 233 437.41 1 74 400 270.41 1 74 342 328.41 1 74 224 446.41 1 74 381 289.41 1 74 283 387.41 1 74 205 465.41 1 74 418 252.41 1 74 321 349.41 1 74 290 380.41 1 74 245 425.41 1 74 299 371.41 1 74 245 425.41 1 74 589 81.41 1 74 368 302.41 1 75 275 317.17 1 74 479 191.41 1 74 313 357.41 1 75 386 206.17 1 74 432 238.41 1 74 295 375.41 1 75 419 173.17 1 74 400 270.41 1 74 227 443.41 1 75 384 208.17 1 74 372 298.41 1 74 218 452.41 1 75 404 188.17 1 74 423 247.41 1 74 222 448.41 1 75 463 129.17 1 74 391 279.41 1 74 243 427.41 1 75 389 203.17 1 74 362 308.41 1 74 216 454.41 1 75 392 200.17 1 74 419 251.41 1 74 247 423.41 1 75 212 380.17 1 74 395 275.41 1 74 250 420.41 1 75 390 202.17 1 74 549 121.41 1 74 240 430.41 1 75 331 261.17 1 74 584 86.41 1 74 319 351.41 1 75 252 340.17 1 74 226 444.41 1 74 301 369.41 1 75 230 362.17 1 74 201 469.41 1 74 379 291.41 1 75 548 44.17 1 74 217 453.41 1 74 245 425.41 1 75 348 244.17 1 74 247 423.41 1 74 211 459.41 1 75 321 271.17 1 74 391 279.41 1 74 246 424.41 1 75 317 275.17 1 74 278 392.41 1 74 233 437.41 1 75 258 334.17 1 74 279 391.41 1 74 206 464.41 1 75 266 326.17 1 74 262 408.41 1 74 197 473.41 1 75 319 273.17 1 74 282 388.41 1 74 260 410.41 1 75 419 173.17 1 74 234 436.41 1 74 233 437.41 1 75 383 209.17 1 74 227 443.41 1 74 225 445.41 1 75 452 140.17 1 74 239 431.41 1 74 225 445.41 1 75 498 94.17 1 74 246 424.41 1 74 234 436.41 1 75 433 159.17 1 74 240 430.41 1 74 170 500.41 1 75 459 133.17 1 74 296 374.41 1 74 217 453.41 1 75 303 289.17 1 Page 54 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 75 239 353.17 1 75 270 322.17 1 76 275 477.79 1 75 360 232.17 1 75 304 288.17 1 76 503 249.79 1 75 285 307.17 1 75 290 302.17 1 76 435 317.79 1 75 289 303.17 1 75 318 274.17 1 76 275 477.79 1 75 286 306.17 1 76 641 111.79 1 76 167 585.79 1 75 301 291.17 1 76 704 48.79 1 76 223 529.79 1 75 289 303.17 1 76 675 77.79 1 76 297 455.79 1 75 400 192.17 1 76 375 377.79 1 76 237 515.79 1 75 447 145.17 1 76 392 360.79 1 76 319 433.79 1 75 400 192.17 1 76 236 516.79 1 76 364 388.79 1 75 324 268.17 1 76 572 180.79 1 76 241 511.79 1 75 395 197.17 1 76 392 360.79 1 76 208 544.79 1 75 442 150.17 1 76 622 130.79 1 76 222 530.79 1 75 361 231.17 1 76 553 199.79 1 76 238 514.79 1 75 461 131.17 1 76 580 172.79 1 76 222 530.79 1 75 410 182.17 1 76 587 165.79 1 76 238 514.79 1 75 360 232.17 1 76 487 265.79 1 76 291 461.79 1 75 282 310.17 1 76 590 162.79 1 76 266 486.79 1 75 337 255.17 1 76 539 213.79 1 76 259 493.79 1 75 296 296.17 1 76 542 210.79 1 76 461 291.79 1 75 306 286.17 1 76 599 153.79 1 76 474 278.79 1 75 350 242.17 1 76 335 417.79 1 76 449 303.79 1 75 240 352.17 1 76 376 376.79 1 76 464 288.79 1 75 210 382.17 1 76 292 460.79 1 76 468 284.79 1 75 305 287.17 1 76 246 506.79 1 76 456 296.79 1 75 209 383.17 1 76 237 515.79 1 76 487 265.79 1 75 316 276.17 1 76 167 585.79 1 76 465 287.79 1 75 315 277.17 1 76 183 569.79 1 76 483 269.79 1 75 185 407.17 1 76 468 284.79 1 76 463 289.79 1 75 284 308.17 1 76 518 234.79 1 76 525 227.79 1 75 413 179.17 1 76 537 215.79 1 76 492 260.79 1 75 270 322.17 1 76 256 496.79 1 76 274 478.79 1 75 301 291.17 1 76 269 483.79 1 76 240 512.79 1 75 297 295.17 1 76 276 476.79 1 76 211 541.79 1 75 275 317.17 1 76 291 461.79 1 76 230 522.79 1 75 280 312.17 1 76 360 392.79 1 76 216 536.79 1 75 303 289.17 1 76 257 495.79 1 76 219 533.79 1 75 306 286.17 1 76 317 435.79 1 76 204 548.79 1 75 279 313.17 1 76 298 454.79 1 76 246 506.79 1 Page 55 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 76 240 512.79 1 78 173 428.07 1 78 444 157.07 1 76 193 559.79 1 78 197 404.07 1 78 218 383.07 1 77 287 348.76 1 78 261 340.07 1 78 208 393.07 1 77 315 320.76 1 78 201 400.07 1 78 272 329.07 1 77 303 332.76 1 78 215 386.07 1 78 244 357.07 1 77 301 334.76 1 78 516 85.07 1 78 269 332.07 1 77 287 348.76 1 78 277 324.07 1 78 262 339.07 1 77 270 365.76 1 78 192 409.07 1 79 207 315.44 1 77 320 315.76 1 78 222 379.07 1 79 163 359.44 1 77 269 366.76 1 78 235 366.07 1 79 222 300.44 1 77 211 424.76 1 78 206 395.07 1 79 155 367.44 1 77 370 265.76 1 78 201 400.07 1 79 286 236.44 1 77 334 301.76 1 78 192 409.07 1 79 235 287.44 1 77 364 271.76 1 78 401 200.07 1 79 232 290.44 1 77 303 332.76 1 78 311 290.07 1 79 264 258.44 1 77 352 283.76 1 78 413 188.07 1 79 347 175.44 1 78 223 378.07 1 78 275 326.07 1 79 299 223.44 1 78 259 342.07 1 78 395 206.07 1 79 242 280.44 1 78 262 339.07 1 78 257 344.07 1 79 336 186.44 1 78 317 284.07 1 78 428 173.07 1 79 229 293.44 1 78 288 313.07 1 78 333 268.07 1 79 303 219.44 1 78 251 350.07 1 78 373 228.07 1 79 341 181.44 1 78 259 342.07 1 78 255 346.07 1 79 261 261.44 1 78 254 347.07 1 78 401 200.07 1 79 295 227.44 1 78 248 353.07 1 78 334 267.07 1 79 258 264.44 1 78 229 372.07 1 78 402 199.07 1 79 293 229.44 1 78 549 52.07 1 78 376 225.07 1 79 216 306.44 1 78 217 384.07 1 78 433 168.07 1 79 224 298.44 1 78 335 266.07 1 78 294 307.07 1 79 310 212.44 1 78 255 346.07 1 78 417 184.07 1 79 283 239.44 1 78 302 299.07 1 78 349 252.07 1 79 251 271.44 1 78 270 331.07 1 78 219 382.07 1 79 227 295.44 1 78 357 244.07 1 78 208 393.07 1 79 265 257.44 1 78 322 279.07 1 78 220 381.07 1 79 271 251.44 1 78 257 344.07 1 78 199 402.07 1 79 259 263.44 1 78 259 342.07 1 78 221 380.07 1 79 311 211.44 1 78 345 256.07 1 78 199 402.07 1 79 278 244.44 1 78 211 390.07 1 78 213 388.07 1 79 204 318.44 1 78 203 398.07 1 78 202 399.07 1 79 231 291.44 1 Page 56 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 79 210 312.44 1 81 353 103.86 1 82 327 53.98 1 79 209 313.44 1 81 446 10.86 1 82 311 69.98 1 79 234 288.44 1 81 355 101.86 1 82 202 178.98 1 79 387 135.44 1 81 288 168.86 1 82 313 67.98 1 79 275 247.44 1 81 280 176.86 1 82 282 98.98 1 79 249 273.44 1 81 296 160.86 1 82 360 20.98 1 79 325 197.44 1 81 230 226.86 1 82 336 44.98 1 79 566 -43.56 -1 81 255 201.86 1 82 346 34.98 1 79 542 -19.56 -1 81 229 227.86 1 82 316 64.98 1 79 615 -92.56 -1 82 371 9.98 1 82 252 128.98 1 79 400 122.44 1 82 306 74.98 1 82 230 150.98 1 79 613 -90.56 -1 82 337 43.98 1 82 245 135.98 1 79 503 19.44 1 82 334 46.98 1 82 262 118.98 1 79 394 128.44 1 82 318 62.98 1 82 331 49.98 1 79 448 74.44 1 82 301 79.98 1 82 249 131.98 1 79 299 223.44 1 82 307 73.98 1 82 231 149.98 1 79 859 - -1 82 295 85.98 1 82 239 141.98 1 336.56 82 317 63.98 1 82 305 75.98 1 79 706 - -1 82 372 8.98 1 83 314 28.01 1 183.56 82 321 59.98 1 83 254 88.01 1 79 229 293.44 1 82 197 183.98 1 83 289 53.01 1 79 733 - -1 210.56 82 230 150.98 1 83 252 90.01 1 79 751 - -1 82 249 131.98 1 83 286 56.01 1 228.56 82 281 99.98 1 83 234 108.01 1 79 752 - -1 82 235 145.98 1 83 272 70.01 1 229.56 82 281 99.98 1 83 270 72.01 1 79 443 79.44 1 82 277 103.98 1 83 278 64.01 1 79 512 10.44 1 82 289 91.98 1 83 313 29.01 1 80 531 449.07 1 82 284 96.98 1 83 213 129.01 1 80 805 175.07 1 82 331 49.98 1 83 252 90.01 1 80 776 204.07 1 82 326 54.98 1 83 232 110.01 1 80 655 325.07 1 82 325 55.98 1 83 252 90.01 1 80 509 471.07 1 82 164 216.98 1 83 235 107.01 1 81 460 -3.14 -1 82 354 26.98 1 83 247 95.01 1 81 353 103.86 1 82 326 54.98 1 83 227 115.01 1 81 308 148.86 1 82 297 83.98 1 83 199 143.01 1 81 251 205.86 1 82 317 63.98 1 83 226 116.01 1 81 263 193.86 1 82 348 32.98 1 83 363 -20.99 -1 81 217 239.86 1 82 265 115.98 1 83 271 71.01 1 81 305 151.86 1 Page 57 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 83 251 91.01 1 84 294 107.90 1 85 330 766.94 1 83 301 41.01 1 84 303 98.90 1 85 324 772.94 1 83 303 39.01 1 84 295 106.90 1 85 825 271.94 1 83 313 29.01 1 84 323 78.90 1 85 934 162.94 1 83 295 47.01 1 84 310 91.90 1 85 632 464.94 1 83 263 79.01 1 84 307 94.90 1 85 730 366.94 1 83 233 109.01 1 84 316 85.90 1 85 870 226.94 1 83 221 121.01 1 84 294 107.90 1 85 743 353.94 1 83 262 80.01 1 84 313 88.90 1 85 482 614.94 1 83 266 76.01 1 84 333 68.90 1 85 434 662.94 1 83 235 107.01 1 84 398 3.90 1 85 478 618.94 1 83 215 127.01 1 84 436 -34.10 -1 85 163 933.94 1 83 236 106.01 1 84 421 -19.10 -1 85 290 806.94 1 83 236 106.01 1 84 394 7.90 1 85 539 557.94 1 83 249 93.01 1 84 248 153.90 1 85 670 426.94 1 83 287 55.01 1 84 228 173.90 1 85 508 588.94 1 83 176 166.01 1 84 242 159.90 1 85 460 636.94 1 83 275 67.01 1 84 229 172.90 1 85 331 765.94 1 83 187 155.01 1 84 265 136.90 1 85 568 528.94 1 83 226 116.01 1 84 157 244.90 1 85 443 653.94 1 83 245 97.01 1 84 269 132.90 1 85 780 316.94 1 84 252 149.90 1 84 185 216.90 1 85 872 224.94 1 84 233 168.90 1 84 209 192.90 1 85 899 197.94 1 84 269 132.90 1 84 237 164.90 1 85 498 598.94 1 84 226 175.90 1 85 375 721.94 1 85 968 128.94 1 84 207 194.90 1 85 265 831.94 1 85 925 171.94 1 84 221 180.90 1 85 292 804.94 1 85 718 378.94 1 84 328 73.90 1 85 343 753.94 1 85 649 447.94 1 84 331 70.90 1 85 350 746.94 1 85 721 375.94 1 84 293 108.90 1 85 527 569.94 1 85 726 370.94 1 84 294 107.90 1 85 302 794.94 1 85 714 382.94 1 84 301 100.90 1 85 585 511.94 1 85 714 382.94 1 84 317 84.90 1 85 270 826.94 1 85 713 383.94 1 84 286 115.90 1 85 394 702.94 1 85 330 766.94 1 84 351 50.90 1 85 321 775.94 1 85 342 754.94 1 84 294 107.90 1 85 313 783.94 1 85 335 761.94 1 84 342 59.90 1 85 394 702.94 1 85 350 746.94 1 84 321 80.90 1 85 313 783.94 1 85 249 847.94 1 84 374 27.90 1 85 361 735.94 1 85 286 810.94 1 Page 58 of 59

Zion Station Restoration Project TSD 17-007 Technical Support Document Revision 0 Gross Gross Gross Count Count Count Survey DCGL- Survey DCGL- Survey DCGL-Rate, Sign Rate, Sign Rate, Sign Unit # Ri Unit # Ri Unit # Ri Ri Ri Ri (cpm) (cpm) (cpm) 85 379 717.94 1 86 326 343.40 1 87 293 187.98 1 85 335 761.94 1 86 338 331.40 1 87 257 223.98 1 85 285 811.94 1 86 348 321.40 1 87 285 195.98 1 85 280 816.94 1 86 405 264.40 1 87 250 230.98 1 85 264 832.94 1 86 420 249.40 1 87 292 188.98 1 85 294 802.94 1 86 345 324.40 1 87 314 166.98 1 85 529 567.94 1 86 371 298.40 1 87 236 244.98 1 85 509 587.94 1 86 380 289.40 1 87 254 226.98 1 85 538 558.94 1 86 330 339.40 1 87 228 252.98 1 85 305 791.94 1 86 316 353.40 1 87 296 184.98 1 86 334 335.40 1 86 318 351.40 1 87 282 198.98 1 86 312 357.40 1 86 330 339.40 1 87 324 156.98 1 86 230 439.40 1 86 311 358.40 1 87 325 155.98 1 86 316 353.40 1 86 302 367.40 1 87 330 150.98 1 86 270 399.40 1 86 319 350.40 1 87 309 171.98 1 86 264 405.40 1 87 598 - -1 87 259 221.98 1 86 285 384.40 1 117.02 87 301 179.98 1 86 309 360.40 1 87 282 198.98 1 87 296 184.98 1 86 327 342.40 1 87 269 211.98 1 87 295 185.98 1 86 290 379.40 1 87 292 188.98 1 87 282 198.98 1 86 325 344.40 1 87 305 175.98 1 87 276 204.98 1 86 313 356.40 1 87 271 209.98 1 87 292 188.98 1 86 353 316.40 1 87 286 194.98 1 87 306 174.98 1 86 331 338.40 1 87 291 189.98 1 87 297 183.98 1 86 327 342.40 1 87 269 211.98 1 87 275 205.98 1 87 281 199.98 1 Page 59 of 59