ak pfh 58(1)_Neck Lake ARD Technical Memorandum.pdf

Jeff Key, PE June 8, 2018 Robert Peccia & Associates 2 1788309

Neck Lake Road ARD Memorandum by the letter suffix to the sample number – for example, sample ABA-03-A was collected in 2018 from the same outcrop as sample ABA-03 collected in 2016. Golder also provided FHWA with guidance on sampling of rock core acquired in 2016. Samples from the rock core were collected by FHWA to generate composite samples representing nominal 10-foot depth intervals for BH16-03, BH16-14, and BH16-16. Each composite sample was made up of individual samples consisting of similar rock type.

2.1.2 Laboratory Test Results and Interpretation

ABA laboratory testing was completed by SVL Analytical in Kellogg, Idaho on samples submitted by FHWA and USFS. Laboratory reports from SVL Analytical are presented in Appendix L of Golder (2017), with the

2018 ABA sample laboratory test results attached to this technical memorandum. The ABA laboratory test results are compiled in Table 1, which contains the following:

Sulfur speciation results (total, non-extractable, non-sulfate, pyritic, and sulfate sulfur)

The acid neutralization potential (ANP)

Paste pH (USFS samples only)

The acid generation potential (AGP) calculated from pyritic sulfur, which represents the reactive (i.e. oxidizable) fraction of the sulfur present

The net potential ratio (NPR), defined as ANP/AGP

The net neutralization potential (NNP), defined as ANP-AGP

ARD potential classifications based on the NPR and NNP, culminating in a final ARD determination that includes professional judgment

2.1.3 Determination of ARD Potential

Golder’s evaluation of the ABA results follows the guidance in MEND (2009)1. Based on NPR values, samples are classified into the following three categories in terms of their ARD potential:

Potentially Acid Generating (PAG) material: NPR < 1

Uncertain PAG material: 1 ≤ NPR ≤ 2

Non-PAG material: NPR > 2

An alternative approach to classification of ARD potential makes use of the NNP, with the following three categories:

PAG material: NNP < -20 kg CaCO3/ton

Uncertain PAG material: -20 ≤ NNP ≤ 20 kg CACO3/ton

Non-PAG material: NNP > 20 kg CACO3/ton

As shown by the results in Table 1, the two classification methods generally show good agreement. The final determination of ARD potential then also takes into account the amount of pyritic sulfur present: below

1 MEND, 1991, Acid Rock Drainage Prediction Manual, A Manual of Chemical Evaluation Procedures for the Prediction of Acid Generation from Mine Wastes, Mine Environment Neutral Drainage, Project 1.16.1b.

Robert Peccia & Associates 3 1788309 a certain pyritic sulfur threshold (typically in the 0.1 percent to 0.3 percent range), acid generation does not occur, regardless of the NPR and NNP designations.

For the final ARD determination in Table 1, out of a total of 88 samples reviewed by Golder (including three samples from Quarry 27-1 and one USFS sample at the Log Transfer Facility), seven samples are classified as PAG, three samples are classified as uncertain PAG, and 78 samples are classified as non-PAG. Sample locations in Figure 1 are color-coded according to the final ARD determinations in Table 1: red (PAG material), orange (uncertain PAG material), green (non-PAG material).

For the samples in Table 1 located in Segment 1 (stationing up to STA 221+50), out of a total of 66 samples, three samples are classified as PAG, one sample is classified as uncertain PAG, and 62 samples are classified as non-PAG.

Based on the ARD determinations presented in Table 1, the following areas appear to have PAG materials

(Figure 1):

STA 88+65 – This is a location of a proposed rock cut on the right shoulder. Bedrock consists of graywacke. Out of a total of seven samples, one sample is classified as PAG material, and six samples are classified as non-PAG material.

STA 144+54, 145+47, 149+90, and BH16-16 - This is a location of a proposed rock cut on the right shoulder. Bedrock consists of graywacke, conglomerate, and breccia.

From a total of 15 samples collected at the existing rock cut and BH16-16 core samples, one sample is classified as PAG material, and 14 samples are classified as non-PAG material.

STA 215+00 to 293+00 - This section of the alignment, predominantly located in Segment 2, consists of argillite, a fine-grained sedimentary rock. The USFS classifies the rock samples collected within this segment as the Descon shale, also a fine-grained sedimentary rock.

For the stationing range of STA 215+00 to STA 221+50 in Segment 1, out of a total of five samples, one sample is classified as PAG material, one sample is classified as uncertain PAG material, and three samples are classified as non-PAG material.

STA 391+71 to 391+81 – Two samples, ABA-18#1 and #2, were collected in the bedrock channel of a river at proposed Bridge 6. The two samples are classified as PAG material.

In addition, eight locations were observed during the 2016 Golder geotechnical investigation where red/orange iron staining occurred:

STA 227+31, 21 ft L – Observed on the left side of the road, iron staining in a seep that flows into a culvert

STA 248+12, 32 ft L - Observed on the left side of the road, iron staining in a stream that flows into a culvert

STA 265+96, 5 ft L - Iron staining in the existing left ditch

STA 270+78, 11 ft L - Observed on the left side of the road, iron staining in a stream that flows into a culvert

Robert Peccia & Associates 4 1788309

STA 291+32, 31 ft L – Observed on the slope left of the road, iron staining from a seep at the base of the organic mat

STA 313+86, 10 ft L - Iron staining in the left existing ditch, located adjacent to a seep in the road

STA 360+54, 2 ft R - Iron staining in the existing left ditch

STA 364+21, 2 ft L - Iron staining in the existing left ditch

2.1.4 Discussion of ARD Potential

The evaluation of ARD potential along the proposed alignment is based on surface sampling of existing rock cuts and from rock core samples. In Segment 1. Multiple samples were collected for ABA testing from individual rock cuts, and also from multiple depth intervals in three boreholes. The presence of iron staining at a small number of locations has limited interpretive value in terms of spatial extent because, without further investigation, iron staining cannot be conclusively linked to the presence of reactive sulfides.

Based on the laboratory results in Table 1, samples with ARD potential appear to occur in limited locations in Segment 1. At the existing rock cuts and in the three boreholes, the majority of the samples collected consist of non-PAG material.

Because of the limited occurrences of material with potential for ARD generation in Segment 1, Golder recommends that FHWA appoint a qualified person to observe rock cuts during construction to document the presence of sulfides and to identify any differences in the geologic materials encountered versus those tested as part of the initial characterization study. Sulfide-containing material may require special management to prevent environmental impacts. For a more rigorous approach, the visual monitoring can be augmented with the use of portable equipment to determine the sulfur content of the rock material being exposed, for instance a portable X-ray fluorescence (XRF) spectrometer. A threshold sulfur value can then be established based on the existing dataset that can be used to trigger one or more mitigation actions.

For PAG material encountered during construction, ARD mitigation options include (first three based on

FHWA 1990)2:

Alignment shift

Encapsulation

Offsite storage

Limestone gravel lining of drainage ditches

Subaqueous placement

No action, but routine monitoring and adaptive management as needed

2 FHWA, 1990, Guidelines for Handling Excavated Acid-Producing Materials, USDOT FHWA-FL-90-007, 82 p.

Robert Peccia & Associates 5 1788309

Selecting a mitigation option would be based on factors such as, but not limited to, the quantity of material to be mitigated, the reactivity of the material to be mitigated, and site conditions at the location where the material is to be placed. FHWA should have an experienced person available to support decision making on ARD mitigation options.

Attachments: Table 1 – Acid Base Accounting Results and Interpretation Figure 1 – Map of Sampling Locations, ARD Classification, and Observed Iron Staining Appendix A - 2018 ABA Laboratory Results

June 2018 1 1788309

Table 1: Acid Base Accounting Results and Interpretation

Sample Number[1] Approximate Station Rock Type Total Sulfur (%)

Non-Extractable Sulfur (%)

Non-Sulfate Sulfur (%)

Pyritic Sulfur

Sulfate Sulfur

Acid Neutralization Potential (kg CaCO3/tonne)[2] pH (s.u.) [3]

Acid Generating Potential (kg CaCO3/tonne)[2] NPR[4]

NNP (kg CaCO3/tonne)[5]

Final ARD Determination[6]

ABA-01 77+50, 0 ft R Limestone <0.01 <0.01 <0.01 <0.01 <0.01 1030 - < 0.3 3296 1030 Non-PAG

ABA-01-A ABA-01 outcrop Limestone <0.01 <0.01 <0.01 <0.01 <0.01 984 8.3 < 0.3 3149 984 Non-PAG

ABA-01-B ABA-01 outcrop Limestone <0.01 <0.01 <0.01 <0.01 <0.01 987 8.3 < 0.3 3158 987 Non-PAG

ABA-BH1603-A / 4.5-14' DEPTH 77+85, 65 ft R Limestone <0.01 <0.01 <0.01 <0.01 <0.01 992 8.3 < 0.3 3174 992 Non-PAG

ABA-BH1603-B / 15-24.5' DEPTH 77+85, 65 ft R Limestone 0.25 <0.01 <0.01 <0.01 0.25 911 8.2 < 0.3 2915 911 Non-PAG

ABA-BH1603-C / 24.5-34.5' DEPTH 77+85, 65 ft R Limestone <0.01 <0.01 <0.01 <0.01 <0.01 982 8.2 < 0.3 3142 982 Non-PAG

ABA-BH1603-D / 34.5-44.5' DEPTH 77+85, 65 ft R Limestone 0.07 <0.01 <0.01 <0.01 0.07 969 8.2 < 0.3 3101 969 Non-PAG

ABA-02 82+26, 24 ft R Argillite <0.01 <0.01 <0.01 <0.01 <0.01 17.5 - < 0.3 56.0 17.2 Non-PAG

ABA-03 88+65, 33 ft R Graywacke 5.50 1.81 4.22 2.41 1.28 56.0 - 75.3 0.7 -19.3 PAG

ABA-03-A ABA-03 outcrop Graywacke <0.01 <0.01 <0.01 <0.01 <0.01 110 8.1 < 0.3 352 110 Non-PAG

ABA-03-B ABA-03 outcrop Graywacke 0.12 <0.01 0.04 0.04 0.09 102 8.3 1.3 81.6 101 Non-PAG

ABA-03-C ABA-03 outcrop Graywacke 0.32 <0.01 <0.01 <0.01 0.30 511 8.3 < 0.3 1635 511 Non-PAG

ABA-03-D ABA-03 outcrop Graywacke 0.40 <0.01 <0.01 <0.01 0.40 536 8.3 < 0.3 1715 536 Non-PAG

ABA-03-E ABA-03 outcrop Graywacke 0.11 <0.01 0.03 0.03 0.08 64.3 8.4 0.9 68.6 63.4 Non-PAG

ABA-03-F ABA-03 outcrop Graywacke 0.03 <0.01 0.02 0.02 0.01 23.3 8.4 0.6 37.3 22.7 Non-PAG

ABA-04 #1 93+94, 8 ft R Graywacke 0.08 <0.01 0.06 0.06 0.02 96.2 - 1.9 51.3 94.3 Non-PAG

ABA-04 #2 94+07, 6 ft R Volcanic Intrusion 0.13 0.02 0.02 <0.01 0.10 145 - < 0.3 464 145 Non-PAG

ABA-04-A ABA-04 outcrop Graywacke 0.15 <0.01 0.01 0.01 0.10 260 8.4 0.3 832 260 Non-PAG

ABA-04-B ABA-04 outcrop Graywacke 0.12 <0.01 <0.01 <0.01 0.10 280 8.4 < 0.3 896 280 Non-PAG

ABA-04-C ABA-04 outcrop Graywacke 0.02 <0.01 <0.01 <0.01 0.02 55.2 8.3 < 0.3 177 54.9 Non-PAG

ABA-05 107+81, 48 ft L Sedimentary rock between pillow basalts 5.30 0.03 3.27 3.24 2.03 725 - 101.3 7.2 624 Non-PAG

ABA-05-A ABA-05 outcrop Basalt 0.02 <0.01 <0.01 <0.01 0.02 977 8.1 < 0.3 3126 977 Non-PAG

ABA-05-B ABA-05 outcrop Basalt 0.05 <0.01 0.03 0.03 0.02 31.6 8.3 0.9 33.7 30.7 Non-PAG

ABA-05-C ABA-05 outcrop Basalt 0.17 <0.01 0.11 0.10 0.06 23.3 8.2 3.1 7.5 20.2 Non-PAG

ABA-05-D ABA-05 outcrop Basalt 0.23 <0.01 0.07 0.07 0.20 69.1 8.3 2.2 31.6 66.9 Non-PAG

ABA-06 108+29, 5 ft R Basalt 0.86 0.06 0.70 0.64 0.16 127 - 20.0 6.4 107 Non-PAG

ABA-BH1614-A / 1-11.5' DEPTH 124+58, 162 ft right Conglomerate 0.09 <0.01 0.05 0.05 0.03 42.3 8.5 1.6 27.1 40.7 Non-PAG

ABA-BH1614-B / 11.5-31.5' DEPTH 124+58, 162 ft right Conglomerate 0.01 <0.01 <0.01 <0.01 0.01 47.6 8.6 < 0.3 152 47.3 Non-PAG

ABA-BH1614-C / 31.5-36.5' DEPTH 124+58, 162 ft right Conglomerate <0.01 <0.01 <0.01 <0.01 <0.01 22.0 8.3 < 0.3 70.4 21.7 Non-PAG

ABA-BH1614-D / 36.5-46' DEPTH 124+58, 162 ft right Conglomerate <0.01 <0.01 <0.01 <0.01 <0.01 127 8.8 < 0.3 406 127 Non-PAG

ABA-BH1614-E / 46-54' DEPTH 124+58, 162 ft right Graywacke 0.02 <0.01 <0.01 <0.01 0.02 127 8.6 < 0.3 406 127 Non-PAG

ABA-BH1614-F / 54-61' DEPTH 124+58, 162 ft right Graywacke 0.01 <0.01 <0.01 <0.01 0.01 116 8.5 < 0.3 371 116 Non-PAG

ABA-BH1614-G / 61-76' DEPTH 124+58, 162 ft right Conglomerate 0.09 <0.01 0.06 0.06 0.03 52.7 9.1 1.9 28.1 50.8 Non-PAG

ABA-BH1614-H / 76-91' DEPTH 124+58, 162 ft right Conglomerate 0.01 <0.01 <0.01 <0.01 0.01 65.2 9.0 < 0.3 209 64.9 Non-PAG

ABA-BH1614-I / 91-105.2' DEPTH 124+58, 162 ft right Conglomerate 0.01 <0.01 <0.01 <0.01 0.01 64.5 9.1 < 0.3 206 64.2 Non-PAG

ABA-BH1614-J / 105.2-111' DEPTH 124+58, 162 ft right Graywacke 0.03 <0.01 0.02 0.02 <0.01 48.5 9.0 0.6 77.6 47.9 Non-PAG

ABA-07 125+05, 13 ft R Graywacke 0.02 0.01 0.02 0.01 < 0.01 94.9 - 0.3 304 94.6 Non-PAG

ABA-07-A ABA-07 outcrop Graywacke <0.01 <0.01 <0.01 <0.01 <0.01 85.4 8.5 < 0.3 273 85.1 Non-PAG

ABA-07-B ABA-07 outcrop Graywacke 0.12 <0.01 0.04 0.04 0.07 53.6 8.3 1.3 42.9 52.4 Non-PAG

ABA-07-C ABA-07 outcrop Graywacke 0.01 <0.01 <0.01 <0.01 0.01 49.3 8.6 < 0.3 158 49.0 Non-PAG

ABA-07-D ABA-07 outcrop Graywacke 0.17 <0.01 0.10 0.10 0.07 19.2 8.2 3.1 6.1 16.1 Non-PAG

ABA-BH1616-A / 0-11' DEPTH 144+54, 79 ft right Breccia 0.33 <0.01 0.20 0.20 0.13 72.5 8.1 6.3 11.6 66.3 Non-PAG

ABA-BH1616-B / 11-26' DEPTH 144+54, 79 ft right Breccia 0.24 <0.01 0.14 0.14 0.10 50.2 8.1 4.4 11.5 45.8 Non-PAG

ABA-BH1616-C / 26-36' DEPTH 144+54, 79 ft right Breccia 0.18 <0.01 0.12 0.12 0.05 21.6 8.4 3.8 5.8 17.9 Non-PAG

ABA-BH1616-D / 36-53.8' DEPTH 144+54, 79 ft right Breccia 0.10 <0.01 0.08 0.08 0.02 24.1 8.6 2.5 9.6 21.6 Non-PAG

ABA-BH1616-E / 53.8-65' DEPTH 144+54, 79 ft right Graywacke 0.30 <0.01 0.18 0.18 0.12 19.9 8.3 5.6 3.5 14.3 Non-PAG

ABA-BH1616-F / 65-76' DEPTH 144+54, 79 ft right Graywacke 0.30 <0.01 0.21 0.21 0.09 20.4 8.4 6.6 3.1 13.8 Non-PAG

ABA-BH1616-G / 76-91' DEPTH 144+54, 79 ft right Graywacke 0.09 <0.01 0.06 0.06 0.03 48.0 8.5 1.9 25.6 46.1 Non-PAG

ABA-BH1616-H / 91-104.3' DEPTH 144+54, 79 ft right Conglomerate 0.05 <0.01 0.04 0.04 <0.01 28.6 8.6 1.3 22.9 27.4 Non-PAG

15JB014 144+94, 14 ft R Luck Creek Breccia (USFS Sample) 0.27 < 0.01 0.24 0.24 0.03 75.2 8.3 7.5 10.0 67.7 Non-PAG

ABA-08 145+47, 11 ft L Graywacke 0.14 0.01 0.08 0.06 0.06 152 - 1.9 81.1 150 Non-PAG

Table 1 ABA Results Interpretation.xlsx

June 2018 2 1788309

Table 1: Acid Base Accounting Results and Interpretation

Sample Number[1] Approximate Station Rock Type Total Sulfur (%)

Non-Extractable Sulfur (%)

Non-Sulfate Sulfur (%)

Pyritic Sulfur

Sulfate Sulfur

Acid Neutralization Potential (kg CaCO3/tonne)[2] pH (s.u.) [3]

Acid Generating Potential (kg CaCO3/tonne)[2] NPR[4]

NNP (kg CaCO3/tonne)[5]

Final ARD Determination[6]

ABA-08-A ABA-08 outcrop Graywacke 1.12 <0.01 0.89 0.90 0.20 20.4 8.1 28.1 0.7 -7.7 PAG

ABA-08-B ABA-08 outcrop Graywacke 0.33 <0.01 0.21 0.21 0.13 20.1 8.5 6.6 3.1 13.5 Non-PAG

ABA-08-C ABA-08 outcrop Graywacke 0.27 <0.01 <0.01 <0.01 0.27 291 8.7 < 0.3 931 291 Non-PAG

ABA-08-D ABA-08 outcrop Graywacke 0.25 <0.01 <0.01 <0.01 0.25 322 8.2 < 0.3 1030 322 Non-PAG

ABA-09 145+90, 2 ft R Graywacke 0.08 < 0.01 0.05 0.05 0.03 55.0 - 1.6 35.2 53.4 Non-PAG

ABA-10 #1 158+74, 26 ft L Argillite 0.11 < 0.01 0.04 0.04 0.07 210 - 1.3 168 209 Non-PAG

ABA-10 #2 158+76, 1 ft L Argillite 1.01 0.02 0.92 0.91 0.09 245 - 28.4 8.6 217 Non-PAG

ABA-10-A ABA-10 outcrop Argillite 0.05 <0.01 0.02 0.02 0.03 12.2 7.4 0.6 19.5 11.6 Non-PAG

ABA-10-B ABA-10 outcrop Argillite 0.07 <0.01 <0.01 <0.01 0.07 114 7.9 < 0.3 365 114 Non-PAG

ABA-10-C ABA-10 outcrop Argillite 0.10 <0.01 0.02 0.02 0.08 165 8.3 0.6 264 164 Non-PAG

15JB012 215+06, 8 ft L Descon Shale (USFS Sample) 0.35 < 0.01 0.30 0.30 0.05 75.2 8.3 9.4 8.0 65.8 Non-PAG

ABA-11 215+07, 15 ft L Argillite 0.47 < 0.01 0.34 0.34 0.14 45.0 - 10.6 4.2 34.4 Non-PAG

ABA-11-A ABA-11 outcrop Argillite 0.74 <0.01 0.45 0.45 0.30 16.5 8.0 14.1 1.2 2.4 Uncertain Material

ABA-11-B ABA-11 outcrop Argillite 0.07 <0.01 0.05 0.05 0.02 39.2 8.4 1.6 25.1 37.6 Non-PAG

ABA-09A 220+40, 11 ft L Argillite 1.41 0.02 1.19 1.17 0.22 8.5 - 36.6 0.2 -28.1 PAG

ABA-12 226+45, 12 ft L Argillite 0.77 < 0.01 0.48 0.48 0.29 32.0 - 15.0 2.1 17.0 Non-PAG

15JB010 232+86, 34 ft L Descon Shale (USFS Sample) 0.76 < 0.01 0.65 0.65 0.11 37.6 8.2 20.3 1.9 17.3 Uncertain Material

ABA-13 245+37, 3 ft L Argillite 0.27 < 0.01 0.17 0.17 0.11 15.0 - 5.3 2.8 9.7 Non-PAG

15JB009 245+39, 15 ft R Descon Shale (USFS Sample) 0.59 < 0.01 0.51 0.51 0.08 16.0 8.0 15.9 1.0 0.1 Uncertain Material

15JB008 268+31, 6 ft L Descon Shale (USFS Sample) 1.20 0.01 1.05 1.04 0.15 12.5 6.7 32.5 0.4 -20.0 PAG

ABA-14 269+15, 17 ft L Argillite 1.52 < 0.01 1.23 1.23 0.29 22.0 - 38.4 0.6 -16.4 PAG

ABA-15 279+62, 20 ft L Argillite 0.47 < 0.01 0.29 0.29 0.18 41.0 - 9.1 4.5 31.9 Non-PAG

ABA-16 284+28, 18 ft R Argillite 0.11 < 0.01 0.07 0.07 0.04 106 - 2.2 48.5 104 Non-PAG

15JB007 285+15, 1 ft L Descon Shale (USFS Sample) 0.52 0.03 0.42 0.39 0.10 123 8.0 12.2 10.1 111 Non-PAG

15JB005 330+81, 12 ft R Descon Shale (USFS Sample) 0.49 0.02 0.38 0.37 0.11 35.6 8.3 11.6 3.1 24.0 Non-PAG

ABA-17 350+99, 13 ft L Argillite 0.19 < 0.01 0.12 0.12 0.08 60.0 - 3.8 16.0 56.3 Non-PAG

ABA-17A 363+71, 4 ft L Graywacke 0.13 < 0.01 0.09 0.09 0.04 65.0 - 2.8 23.1 62.2 Non-PAG

ABA-17B 373+22, 7 ft L Graywacke 0.08 < 0.01 0.03 0.03 0.05 82.5 - 0.9 88.0 81.6 Non-PAG

ABA-17C 386+21, 3 ft L Argillite 0.11 < 0.01 0.07 0.07 0.04 26.5 - 2.2 12.1 24.3 Non-PAG

ABA-18 #1 391+71, 59 ft R Argillite 1.33 < 0.01 0.97 0.97 0.36 9.0 - 30.3 0.3 -21.3 PAG

ABA-18 #2 391+81, 36 ft L Argillite 2.10 < 0.01 1.68 1.68 0.42 14.5 - 52.5 0.3 -38.0 PAG

ABA-18A 426+77, 25 ft L Graywacke 0.49 < 0.01 0.25 0.25 0.23 100 - 7.8 12.8 92.2 Non-PAG

ABA-19 432+06, 100 ft L Argillite 0.49 < 0.01 0.33 0.33 0.16 66.2 - 10.3 6.4 55.9 Non-PAG

ABA-20 From Quarry 27-1 (*) Limestone <0.01 <0.01 <0.01 <0.01 <0.01 1010 - < 0.3 3232 1010 Non-PAG

ABA-21-A Quarry 27-1 Limestone <0.01 <0.01 <0.01 <0.01 <0.01 1000 8.2 < 0.3 3200 1000 Non-PAG

ABA-21-B Quarry 27-1 Limestone <0.01 <0.01 <0.01 <0.01 <0.01 994 8.2 < 0.3 3181 994 Non-PAG

15JB013 Log Transfer Facility Descon Shale (USFS Sample) 0.64 < 0.01 0.57 0.57 0.06 42.6 8.2 17.8 2.4 24.8 Non-PAG

Notes:

[1] Laboratory testing of these samples completed by SVL Analytical for WFLHD

[2] CaCO3 - calcium carbonate

[3] (s.u.) Standard Unit

[4] NPR: Net Potential Ratio = Acid Neutralization Potential/Acid Generating Potential

[5] NNP: Net Neutralization Potential = Acid Neutralization Potential-Acid Generating Potential

[6] Classification of ARD Potential:

Potentially Acid Generating (PAG) material

Uncertain PAG Material

Non-PAG Material

(*) sample location assigned to the approximate middle of the proposed Quarry 27-1 material source

All calculations were performed using detection limit values

Table 1 ABA Results Interpretation.xlsx

SOdf

SbpSbp Shl

Sbp

SOdf

Schl

Sbp

SOdf

Sbp

Sbp Sbp

Sbp Shl

Sbp

Shl

Shl

Shl

Qs

!5

!5

!5 !5

!5 !5

!5!5

!5

!5!5

!5

!5

!5!5 !5

!5

!k

!k

!k

!k

!k

!k

!k

!k

420+00

360+00

+00

+00340+00

320+00

300+00

0+

260+00

240+00

220+00

200+00

+00

160+00

140+00

120+00

100+00

80+00

60+00

40+00

20+00

SEGMENT 2

END

SEGMENT 1

BEGIN

WHALE PASSAGE

NECK LAKE

NFSR 20

NFSR

NFSR 27

SE

GM

EN

T 2

SE

GM

EN

T 1

15JB012

BH16-16

BH16-14

BH16-03

ABA-09A

ABA-11

ABA-10

ABA-09

ABA-08

ABA-07

ABA-06

ABA-05ABA-04

ABA-03

ABA-02ABA-01

15JB014

Whale Pass

15JB005

15JB007

15JB008

15JB009

15JB010

15JB013

ABA-12

ABA-13

ABA-17

ABA-17A

ABA-17B

ABA-17C

ABA-18 #1

ABA-18 #2

ABA-18A

ABA-19

227+31, 21 L

248+12, 32 L

270+78, 11 L

291+32, 31 L

360+54, 2 R

265+96, 5 L

313+86, 10 L

364+21, 2 L

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CLIENT

WESTERN FEDERAL LANDS HIGHWAY DIVISION

REFERENCE(S)REFERENCE(S)

4. HILLSHADE DEVELOPED FROM 5 METER RESOLUTION IFSAR DATA ACQUIRED BY ALASKA

STATEWIDE DIGITAL MAPPING INITIATIVE (SDMI) AND DISTRIBUTED BY ALASKA DIVISION OF

GEOLOGICAL & GEOPHYSICAL SURVEYS ONLINE MAP "ELEVATION DATASETS IN ALASKA".

5. PROPOSED ROAD ALIGNMENTS AND STATIONING PROVIDED BY ROBERT PECCIA &

ASSOCIATES ON 02-14-2018.

1. GEOLOGY MODIFIED FROM BREW AND OTHERS (1984) AND AND WILSON AND OTHERS

(2015)

2. GEOLOGIC UNITS FROM: BREW, D.A., OVENSHINE, A.T., KARL, S.M., AND HUNT, S.J., 1984, PRELIMINARY RECONNAISSANCE GEOLOGIC MAP OF THE PETERSBURG AND PARTS OF THE

PORT ALEXANDER AND SUMDUM 1:250,000 QUADRANGLES, SOUTHEASTERN ALASKA: U.S.

GEOLOGICAL SURVEY OPEN-FILE REPORT 84-405, 43 P., 2 SHEETS, SCALE 1:250,000.

3. GEOLOGIC CONTACTS AND FAULTS FROM: WILSON, F.H., HULTS, C.P., MULL, C.G., AND KARL, S.M., 2015, GEOLOGIC MAP OF ALASKA: U.S. GEOLOGICAL SURVEY SCIENTIFIC

INVESTIGATIONS MAP 3340, 197 P., 2 SHEETS, SCALE 1:1,584,000.

PROJECT

NECK LAKE ROAD RECONSTRUCTION

TITLE

MAP OF SAMPLING LOCATIONS, ARD CLASSIFICATION,

AND OBSERVED IRON STAINING

1656655 - C 1

2018-06-08

APG

ECC

TGK

CONSULTANT

PROJECT NO. CONTROL REV. FIGURE

YYYY-MM-DD

DESIGNED

PREPARED

REVIEWED

APPROVED

Edna Bay

Whale Pass

Point Baker

Coffman Cove

Port Protection 0 2,000 4,0001,000

Feet

LEGEND

Proposed Alignment

Contact Contact (Inferred) Fault Fault (Inferred)

Qs - Surficial Deposits Shl - Heceta Limestone Schl - Conglomerate, Heceta Limestone Sbp - Bay of Pillars Formation SOdf - Descon Formation Water

PRINCE OF

WALES ISLAND

GEOLOGIC UNITS

Observed Iron Staining (Station, Offset Left (L) or Right (R) in Feet)kj

Sampling Location For Acid Base Accounting

SEGMENT 2

PAG MATERIAL CLASSIFICATIONS

") PAG MATERIAL

") UNCERTAIN PAG MATERIAL

") NON-PAG MATERIAL

Legend

!5 SAMPLING LOCATION FOR ACID BASE ACCOUNTING

!5

SAMPLING LOCATION FOR ACID BASE ACCOUNTING

Sampling Site

Acid Base Accounting Sample Number PAG Material

Classification

ABA-01 ABA-01

ABA-01 ABA-01-A

ABA-01 ABA-01-B

BH16-03 ABA-BH1603-A / 4.5-14' DEPTH

BH16-03 ABA-BH1603-B / 15-24.5' DEPTH

BH16-03 ABA-BH1603-C / 24.5-34.5' DEPTH

BH16-03 ABA-BH1603-D / 34.5-44.5' DEPTH

ABA-02 ABA-02

ABA-03 ABA-03

ABA-03 ABA-03-A

ABA-03 ABA-03-B

ABA-03 ABA-03-C

ABA-03 ABA-03-D

ABA-03 ABA-03-E

ABA-03 ABA-03-F

ABA-04 ABA-04 #1

ABA-04 ABA-04 #2

ABA-04 ABA-04-A

ABA-04 ABA-04-B

ABA-04 ABA-04-C

ABA-05 ABA-05

ABA-05 ABA-05-A

ABA-05 ABA-05-B

ABA-05 ABA-05-C

ABA-05 ABA-05-D

ABA-06 ABA-06

BH16-14 ABA-BH1614-A / 1-11.5' DEPTH

BH16-14 ABA-BH1614-B / 11.5-31.5' DEPTH

BH16-14 ABA-BH1614-C / 31.5-36.5' DEPTH

BH16-14 ABA-BH1614-D / 36.5-46' DEPTH

BH16-14 ABA-BH1614-E / 46-54' DEPTH

BH16-14 ABA-BH1614-F / 54-61' DEPTH

BH16-14 ABA-BH1614-G / 61-76' DEPTH

BH16-14 ABA-BH1614-H / 76-91' DEPTH

BH16-14 ABA-BH1614-I / 91-105.2' DEPTH

BH16-14 ABA-BH1614-J / 105.2-111' DEPTH

ABA-07 ABA-07

ABA-07 ABA-07-A

ABA-07 ABA-07-B

ABA-07 ABA-07-C

ABA-07 ABA-07-D

BH16-16 ABA-BH1616-A / 0-11' DEPTH

BH16-16 ABA-BH1616-B / 11-26' DEPTH

BH16-16 ABA-BH1616-C / 26-36' DEPTH

BH16-16 ABA-BH1616-D / 36-53.8' DEPTH

BH16-16 ABA-BH1616-E / 53.8-65' DEPTH

BH16-16 ABA-BH1616-F / 65-76' DEPTH

BH16-16 ABA-BH1616-G / 76-91' DEPTH

BH16-16 ABA-BH1616-H / 91-104.3' DEPTH

15JB014 15JB014

ABA-08 ABA-08

ABA-08 ABA-08-A

ABA-08 ABA-08-B

ABA-08 ABA-08-C

ABA-08 ABA-08-D

ABA-09 ABA-09

ABA-10 ABA-10 #1

ABA-10 ABA-10 #2

ABA-10 ABA-10-A

ABA-10 ABA-10-B

ABA-10 ABA-10-C

15JB012 15JB012

ABA-11 ABA-11

ABA-11 ABA-11-A

ABA-11 ABA-11-B

ABA-09A ABA-09A

PAG Material Unknown PAG Material Non-PAG Material

SEGMENT 1

Potentially Acid Generating (PAG) Material Classifications:

610 E. 5th St

17-May-18 13:08Vancouver, WA 98661

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ANALYTICAL REPORT FOR SAMPLES

Sample ID Laboratory ID Matrix Date Sampled Date ReceivedSampled By Notes

X8E0113-01 GA05-Apr-18 00:00Rock 03-May-2018ABA-01-A

X8E0113-02 GA05-Apr-18 00:00Rock 03-May-2018ABA-01-B

X8E0113-03 GA05-Apr-18 00:00Rock 03-May-2018ABA-03-A

X8E0113-04 GA05-Apr-18 00:00Rock 03-May-2018ABA-03-B

X8E0113-05 GA05-Apr-18 00:00Rock 03-May-2018ABA-03-C

X8E0113-06 GA05-Apr-18 00:00Rock 03-May-2018ABA-03-D

X8E0113-07 GA05-Apr-18 00:00Rock 03-May-2018ABA-03-E

X8E0113-08 GA05-Apr-18 00:00Rock 03-May-2018ABA-03-F

X8E0113-09 GA05-Apr-18 00:00Rock 03-May-2018ABA-04-A

X8E0113-10 GA05-Apr-18 00:00Rock 03-May-2018ABA-04-B

X8E0113-11 GA05-Apr-18 00:00Rock 03-May-2018ABA-04-C

X8E0113-12 GA05-Apr-18 00:00Rock 03-May-2018ABA-05-A

X8E0113-13 GA05-Apr-18 00:00Rock 03-May-2018ABA-05-B

X8E0113-14 GA05-Apr-18 00:00Rock 03-May-2018ABA-05-C

X8E0113-15 GA05-Apr-18 00:00Rock 03-May-2018ABA-05-D

X8E0113-16 GA05-Apr-18 00:00Rock 03-May-2018ABA-07-A

X8E0113-17 GA05-Apr-18 00:00Rock 03-May-2018ABA-07-B

X8E0113-18 GA05-Apr-18 00:00Rock 03-May-2018ABA-07-C

X8E0113-19 GA05-Apr-18 00:00Rock 03-May-2018ABA-07-D

X8E0113-20 GA05-Apr-18 00:00Rock 03-May-2018ABA-08-A

Solid samples are analyzed on an as-received, wet-weight basis, unless otherwise requested.

Sample preparation is defined by the client as per their Data Quality Objectives.

This report supercedes any previous reports for this Work Order. The complete report includes pages for each sample, a full QC report, and a notes section.

Analyses were performed in accordance with SVL standard operating procedures and calibrations were performed and met SVL internal

QC criteria.

The results presented in this report relate only to the samples, and meet all requirements of the NELAC Standards unless otherwise noted.

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 1 of 23 http://www.svl.net

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-01 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-01-A

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/14/18 10:31Modified Sobek 984 N/A0.3TCaCO3/kTABA

05/09/18 13:18Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 984 X8193560.3TCaCO3/kTANP

AGF 05/09/18 13:18Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/09/18 13:18Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/09/18 13:18Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/09/18 13:18Modified Sobek < 0.01 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:18Modified Sobek < 0.01 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @20.5°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 2 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-02 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-01-B

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/14/18 10:31Modified Sobek 987 N/A0.3TCaCO3/kTABA

05/09/18 13:27Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 987 X8193560.3TCaCO3/kTANP

AGF 05/09/18 13:27Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/09/18 13:27Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/09/18 13:27Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/09/18 13:27Modified Sobek < 0.01 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:27Modified Sobek < 0.01 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @20.3°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 3 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-03 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-03-A

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/14/18 10:31Modified Sobek 110 N/A0.3TCaCO3/kTABA

05/09/18 13:30Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 110 X8193560.3TCaCO3/kTANP

AGF 05/09/18 13:30Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/09/18 13:30Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/09/18 13:30Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/09/18 13:30Modified Sobek < 0.01 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:30Modified Sobek < 0.01 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.1 X819272pH UnitsPaste pH @20.7°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 4 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-04 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-03-B

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:16Modified Sobek 101 N/A0.3TCaCO3/kTABA

05/15/18 14:16Modified Sobek 1.1 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 102 X8193560.3TCaCO3/kTANP

AGF 05/15/18 14:16Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:03Modified Sobek 0.04 0.008 R2B X8191700.01%Non-Sulfate Sulfur

05/15/18 14:16Modified Sobek 0.04 N/A0.01%Pyritic Sulfur

05/15/18 13:03Modified Sobek 0.09 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:33Modified Sobek 0.12 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @20.6°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 5 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-05 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-03-C

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:19Modified Sobek 511 N/A0.3TCaCO3/kTABA

05/15/18 14:19Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 511 X8193560.3TCaCO3/kTANP

AGF 05/15/18 14:19Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:06Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:19Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/15/18 13:06Modified Sobek 0.30 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:38Modified Sobek 0.32 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @20.2°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 6 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-06 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-03-D

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:22Modified Sobek 536 N/A0.3TCaCO3/kTABA

05/15/18 14:22Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 536 X8193560.3TCaCO3/kTANP

AGF 05/15/18 14:22Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:09Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:22Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/15/18 13:09Modified Sobek 0.40 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:42Modified Sobek 0.40 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @20.2°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 7 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-07 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-03-E

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:25Modified Sobek 63.4 N/A0.3TCaCO3/kTABA

05/15/18 14:25Modified Sobek 0.9 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 64.3 X8193550.3TCaCO3/kTANP

AGF 05/15/18 14:25Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:12Modified Sobek 0.03 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:25Modified Sobek 0.03 N/A0.01%Pyritic Sulfur

05/15/18 13:12Modified Sobek 0.08 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:45Modified Sobek 0.11 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.4 X819272pH UnitsPaste pH @20.1°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 8 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-08 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-03-F

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:28Modified Sobek 22.6 N/A0.3TCaCO3/kTABA

05/15/18 14:28Modified Sobek 0.7 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 23.3 X8193550.3TCaCO3/kTANP

AGF 05/15/18 14:28Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:15Modified Sobek 0.02 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:28Modified Sobek 0.02 N/A0.01%Pyritic Sulfur

05/15/18 13:15Modified Sobek 0.01 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:48Modified Sobek 0.03 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.4 X819272pH UnitsPaste pH @20.0°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 9 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-09 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-04-A

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:31Modified Sobek 260 N/A0.3TCaCO3/kTABA

05/15/18 14:31Modified Sobek 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 260 X8193560.3TCaCO3/kTANP

AGF 05/15/18 14:31Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:18Modified Sobek 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:31Modified Sobek 0.01 N/A0.01%Pyritic Sulfur

05/15/18 13:18Modified Sobek 0.10 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:51Modified Sobek 0.15 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.4 X819272pH UnitsPaste pH @20.0°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 10 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-10 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-04-B

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:34Modified Sobek 280 N/A0.3TCaCO3/kTABA

05/15/18 14:34Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 280 X8193560.3TCaCO3/kTANP

AGF 05/15/18 14:34Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:21Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:34Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/15/18 13:21Modified Sobek 0.10 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:54Modified Sobek 0.12 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.4 X819272pH UnitsPaste pH @19.7°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 11 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-11 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-04-C

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:38Modified Sobek 55.2 N/A0.3TCaCO3/kTABA

05/15/18 14:38Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 55.2 X8193550.3TCaCO3/kTANP

AGF 05/15/18 14:38Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:24Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:38Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/15/18 13:24Modified Sobek 0.02 N/A0.01%Sulfate Sulfur

AGF 05/09/18 13:57Modified Sobek 0.02 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @20.0°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 12 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-12 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-05-A

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:41Modified Sobek 977 N/A0.3TCaCO3/kTABA

05/15/18 14:41Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 10:31Modified Sobek 977 X8193560.3TCaCO3/kTANP

AGF 05/15/18 14:41Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:33Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:41Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/15/18 13:33Modified Sobek 0.02 N/A0.01%Sulfate Sulfur

AGF 05/09/18 14:07Modified Sobek 0.02 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.1 X819272pH UnitsPaste pH @19.7°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 13 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-13 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-05-B

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:44Modified Sobek 30.5 N/A0.3TCaCO3/kTABA

05/15/18 14:44Modified Sobek 1.0 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 31.6 X8193550.3TCaCO3/kTANP

AGF 05/15/18 14:44Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:37Modified Sobek 0.03 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:44Modified Sobek 0.03 N/A0.01%Pyritic Sulfur

05/15/18 13:37Modified Sobek 0.02 N/A0.01%Sulfate Sulfur

AGF 05/09/18 14:11Modified Sobek 0.05 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @19.6°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 14 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-14 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-05-C

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:53Modified Sobek 19.8 N/A0.3TCaCO3/kTABA

05/15/18 14:53Modified Sobek 3.6 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 23.3 X8193550.3TCaCO3/kTANP

AGF 05/15/18 14:53Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:40Modified Sobek 0.11 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:53Modified Sobek 0.10 N/A0.01%Pyritic Sulfur

05/15/18 13:40Modified Sobek 0.06 N/A0.01%Sulfate Sulfur

AGF 05/09/18 14:14Modified Sobek 0.17 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.2 X819272pH UnitsPaste pH @19.7°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 15 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-15 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-05-D

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:56Modified Sobek 66.9 N/A0.3TCaCO3/kTABA

05/15/18 14:56Modified Sobek 2.2 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 69.1 X8193550.3TCaCO3/kTANP

AGF 05/15/18 14:56Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:43Modified Sobek 0.07 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:56Modified Sobek 0.07 N/A0.01%Pyritic Sulfur

05/15/18 13:43Modified Sobek 0.20 N/A0.01%Sulfate Sulfur

AGF 05/09/18 14:17Modified Sobek 0.23 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @19.5°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 16 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-16 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-07-A

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/14/18 14:28Modified Sobek 85.4 N/A0.3TCaCO3/kTABA

05/09/18 14:20Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 85.4 X8193550.3TCaCO3/kTANP

AGF 05/09/18 14:20Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/09/18 14:20Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/09/18 14:20Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/09/18 14:20Modified Sobek < 0.01 N/A0.01%Sulfate Sulfur

AGF 05/09/18 14:20Modified Sobek < 0.01 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.5 X819272pH UnitsPaste pH @19.2°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 17 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-17 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-07-B

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 14:59Modified Sobek 52.2 N/A0.3TCaCO3/kTABA

05/15/18 14:59Modified Sobek 1.4 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 53.6 X8193550.3TCaCO3/kTANP

AGF 05/15/18 14:59Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:46Modified Sobek 0.04 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 14:59Modified Sobek 0.04 N/A0.01%Pyritic Sulfur

05/15/18 13:46Modified Sobek 0.07 N/A0.01%Sulfate Sulfur

AGF 05/09/18 14:23Modified Sobek 0.12 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.3 X819272pH UnitsPaste pH @19.3°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 18 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-18 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-07-C

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 15:02Modified Sobek 49.3 N/A0.3TCaCO3/kTABA

05/15/18 15:02Modified Sobek < 0.3 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 49.3 X8193550.3TCaCO3/kTANP

AGF 05/15/18 15:02Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:49Modified Sobek < 0.01 0.008 X8191700.01%Non-Sulfate Sulfur

05/15/18 15:02Modified Sobek < 0.01 N/A0.01%Pyritic Sulfur

05/15/18 13:49Modified Sobek 0.01 N/A0.01%Sulfate Sulfur

AGF 05/09/18 14:26Modified Sobek 0.01 0.008 X8191700.01%Total Sulfur

Classical Chemistry Parameters

AGF 05/10/18 14:15EPA 600/2-78-054 mod 8.6 X819272pH UnitsPaste pH @19.3°C

This data has been reviewed for accuracy and has been authorized for release by the Laboratory Director or designee.

Heather LaPierre

Project Manager

SVL holds the following certifications:

AZ:0538, CA:2080, ID:ID00019 & ID00965 (Microbiology), NV:ID000192007A, UT(TNI):ID000192015-1, WA:C573 Work order Report Page 19 of 23

Kellogg, ID 83837-0929

(208) 784-1258

One Government Gulch - PO Box 929

Reported:

Work Order:

Federal Highway Administratiion - WFLHD Project Name: AK PFH 58(1) Neck Lake 2018

X8E0113 www.svl.net

ResultAnalyte RL AnalyzedMethod DilutionUnits

X8E0113-19 (Rock)

AnalystMDL Notes

Sampled:

Received: 03-May-18

Sampled By:

Client Sample ID:

SVL Sample ID: Sample Report Page 1 of 1

ABA-07-D

Batch

05-Apr-18 00:00

GA

Acid/Base Accounting & Sulfur Forms

05/15/18 15:05Modified Sobek 16.2 N/A0.3TCaCO3/kTABA

05/15/18 15:05Modified Sobek 3.0 N/A0.3TCaCO3/kTAGP

AGF 05/14/18 14:28Modified Sobek 19.2 X8193550.3TCaCO3/kTANP

AGF 05/15/18 15:05Modified Sobek < 0.01 0.008 X8191700.01%Non-extractable Sulfur

AGF 05/15/18 13:52Modified Sobek…