Appendix_E_-_McGuire_KC-46A_Two-Bay_MX_Hangar_Geotech_Report.pdf

GEOTECHNICAL INVESTIGATION REPORT

PROPOSED AIRCRAFT MAINTENANCE HANGAR

“KC-46A TWO-BAY GENERAL PURPOSE MX HANGAR”

Joint Base McGuire/Dix/Lakehurst New Jersey

July 10, 2018

Prepared for: Prepared by:

160 Clairemont Avenue, Suite 600 Decatur, GA 30030

1012 Industrial Drive West Berlin, New Jersey 08091

ACER Project Number: 20180036

1012 Industrial Drive, West Berlin, New Jersey 08091 Tel. (856) 809-1202 Fax. (856) 809-1203

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TABLE OF CONTENTS

1.0 INTRODUCTION

2.0 SITE AND PROJECT DESCRIPTION

3.0 FIELD INVESTIGATION

3.1 Geotechnical Sampling

3.2 Environmental Sampling

4.0 SUBSURFACE CONDITIONS

4.1 Geology

4.2 Soils

4.3 Bedrock

4.4 Groundwater

5.0 LABORATORY ANALYSES

5.1 Standard Classification of Soils

5.2 Modified Proctor & CBR Analyses

5.3 Environmental Analyses

5.4 Corrosivity Testing of Soils & Analysis

6.0 DESIGN PARAMETERS & RECOMMENDATIONS

6.1 Two-Bay Hangar

6.1.1 Shallow Foundation System

6.1.2 Alternative for Deep Foundations

6.1.3 Pavement Design Criteria

6.2 Administrative Area

6.2.1 Shallow Foundation System

6.2.2 Floor Slab Support

6.3 “Land Side” Pavements

6.3.1 Flexible Pavements

6.3.2 Rigid Pavements

6.3.3 General Pavement Considerations

6.4 Site Seismic Design Criteria

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7.0 CONSTRUCTION GUIDELINES & CONSIDERATIONS

7.1 Site Preparations

7.2 Proof-Rolling

7.3 Backfill & Compaction

7.4 Excavations

7.5 Dewatering

7.6 General Pavement Considerations

7.7 Construction Quality Control & Assurance

8.0 LIMITATIONS

9.0 APPENDICES

Appendix A Site Location Map Appendix B Boring Location Plan Appendix C Boring Logs Appendix D Laboratory Test Results Appendix E Geologic Map Appendix F General Information for Geotechnical Reporting

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1.0 INTRODUCTION

This Geotechnical Investigation Report was prepared by Acer Associates, LLC (ACER) at the request of Merrick & Company (Merrick), and contains the results of a geotechnical engineering investigation conducted for the planned construction of a new, slab-on-grade, two-bay aviation maintenance (MX) hangar and associated facilities at Joint Base McGuire/Dix/Lakehurst (MDL) in New Jersey. The purpose of this investigation was to define the stratification of subsurface soils and the engineering properties of these materials in the project area. Based on the results of our field investigation and laboratory test results, geotechnical recommendations for the proposed construction are provided.

The scope of work for this project included a subsurface field investigation, laboratory testing program, and a geotechnical engineering evaluation. This report summarizes the results of the work performed and gives recommendations regarding foundation placement, soil strength conditions, pavement design considerations, and site preparation criteria.

END OF SECTION

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2.0 SITE AND PROJECT DESCRIPTION

The project site is located at the McGuire Air Force Base on the Joint Base MDL facility in New Jersey. At the time of the investigation, the planned construction areas were situated within, and adjacent to, an airfield for Boeing KC-46A Pegasus aircraft and associated facilities, which included two (2) existing aircraft hangar structures, identified as buildings 1801 and 1823, and parking areas that were accessible from Hangar Road. The project site also included existing concrete and asphalt paved areas within the airfield, and grass-covered lawns surrounding the aforementioned structures. Topography across the site was observed to be generally flat, sloping gently downgradient toward the west. The location of the project site is presented on the Site Location Map found in Appendix A.

Based on information provided by Merrick, development at the site will consist of the construction of a new, 90,379-square foot, slab-on-grade structure that will include two (2) maintenance hangar bays and an administrative area. It is ACER’s understanding that the hangar bays will have a combined footprint size of approximately 79,350 square feet, and that the remaining 11,029 square feet of the new structure will consist of administrative space. It is also ACER’s understanding that the planned administrative area will be considered structurally separate from the hangar bays, which are expected to have column loads and uplift loads estimated at 550 kips and 260 kips, respectively, in most instances. Merrick has indicated, however, that at least one column may have a maximum compressive load of approximately 980 kips, with an uplift load of approximately 480 kips, but that this may be an anomaly. Based on a review of structural plans provided by Merrick, the anticipated distances between most columns have been estimated to range from 15.3 feet to 33.5 feet.

These same structural plans have indicated that the main hangar areas will include a rigid concrete pavement section, and that the remaining portions of the structure will have flooring consisting of a 6-inch thick concrete slab-on-grade. A conceptual grading exhibit, also provided by Merrick, indicates that the administrative area will have a finished floor (F.F.) elevation of 120.85 feet above sea level (ASL), and that two (2) maintenance hangar bays will each have floor elevations that slope gently, and steadily, downgradient to the southwest, with F.F. elevations ranging from approximately 120.80 feet ASL to 119.80 feet ASL. Based on these proposed F.F. elevations, and on available on-line topographic data within the project area, it is anticipated that cuts and fills required to raise or lower site grades during construction will be minimal.

It is ACER’s understanding the two (2) existing hangar structures that were present at the time of ACER’s investigation will be demolished, and that the footprint of the new structure will partially overlap the footprint of each of the demolished structures.

It is also ACER’s understanding that the planned improvements to the site will include new and/or renovated “land side” rigid and flexible pavements in the areas surrounding the new hangar structure. Both concrete and asphalt pavements will be in place around the new structure to accommodate typical vehicle traffic (i.e. no aircraft). Merrick and by ADC Engineering (ADC)

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have informed ACER that the design recommendations for “air side” rigid concrete pavements that will accommodate aircraft traffic will be the responsibility of others, and is not included in the scope of work for this geotechnical evaluation.

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3.0 FIELD INVESTIGATION

ACER performed a field investigation, consisting of geotechnical sampling and environmental sampling, at the project site on May 7 through May 10, 2018. Details regarding these tasks are presented below.

3.1 Geotechnical Sampling

The geotechnical investigation consisted of installing a total of fifteen (15) earth borings, referenced as H-1 through H-15, across the project area. Test borings H-2, H-4, H-6, H-7, and H-11 through H-15 were installed within the general, anticipated location of the proposed two-bay hangar structure, and were advanced to depths ranging from approximately 30 to 32 feet below ground surface (bgs). Test borings H-1, H-3, H-5, H-8, H-9 and H-10 were conducted within existing pavement areas that are expected to be renovated as part of the planned construction, and were each advanced to a depth of approximately 10 feet bgs. The locations of the test borings have been depicted on the Boring Location Plan found in Appendix B. Estimated GPS coordinates for each test boring location have been provided on the Boring Logs presented as Appendix C.

The test borings were advanced using a Mobile B-59 truck-mounted drilling rig equipped with hollow stem augers and split spoon samplers. Subsurface soils were sampled within this boring in accordance with ASTM D1586-11 procedures for the Standard Penetration Test (SPT). The SPT value, which is a measure of the soil density and consistency, consists of advancing a two-inch outer-diameter split-barrel sampler, driven by a 140-pound hammer, free falling 30 inches. The number of blows required to advance the sampler over the 12-inch interval from 6 to 18 inches is considered the field "N" value, or SPT value. All samples were visually analyzed and classified in the field and/or laboratory using the United Soil Classification System (USCS). Soil descriptions, depths to compositional changes, and SPT values encountered in the borings were recorded in the field, and are presented in the Boring Logs included in Appendix C. The results of laboratory analyses conducted on representative samples obtained from the test borings are provided in Appendix D, and summarized in Section 5.0 of this report.

3.2 Environmental Sampling

During the test boring operation described in the preceding section of this report, ACER screened all soils retrieved from the borings using a photoionization detector (PID), along with visual and olfactory senses. These PID readings have been included in the Boring Logs presented in Appendix C.

Furthermore, ACER collected a sample from each of the 15 test borings referenced above for environmental analyses. Each sample was analyzed for VOC (EPA Method 8260), SVOC (EPA Method 8270 – B/N Extractables), TAL Metals with Cyanide (NJ) &

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Chromium 6 - Soil, Diesel Range Organics and Gasoline Range Organics (EPA Method 8015C). The results of laboratory analyses conducted on representative samples obtained from the test borings are provided in Appendix D, and summarized in Section 5.0 of this report.

4.0 SUBSURFACE CONDITIONS

4.1 Geology

According to the U.S.G.S., Bedrock Geologic Map of New Jersey, the project area is situated within an area underlain by the Cohansey Formation, Geologic Symbol – Tch, and within the Coastal Plain physiographic province. This formation is composed of gray to brown fine to coarse grained sand, which is gravelly in some locations. It is typically massively bedded to cross-bedded, and the sand consists almost exclusively of quartz.

This formation is also interbedded with discrete layers of thin to thick bedded clay or silty clay. The original thickness of the Cohansey is difficult to ascertain because of extensive erosion. The formation lies in a broad belt and is thickest near Atlantic City, where it is nearly 350 feet thick. The soils encountered during this investigation are considered to be representative of those typically associated with the Cohansey Formation. The location of the site in relation to the regional geology is presented on the Geologic Map found in Appendix E.

4.2 Soils

The surface cover at the locations of the test borings performed across the project area was found to be variable, and is summarized below.

A flexible asphalt pavement layer, measuring approximately 3 to 8 inches in thickness, was encountered at the locations of test borings H-1, H-3, H-5, H-8, and H-11. It should be noted that the pavement section at test boring locations H-1, H-8 and H-11 also included a layer of subbase, consisting of light bluish gray to dark gray well-graded gravel (GW), situated directly below the surficial asphalt, and ranging from approximately 4 to 6 inches in thickness.

A rigid pavement section consisting of concrete, measuring approximately 12 to 16 inches in thickness, was encountered at the locations of test borings H-2, H-7, H-9 and H-10.

A layer of surficial topsoil, measuring approximately 3 to 6 inches in thickness, was encountered at the locations of test borings H-4, H-6, and H-12 through H-15.

Below the surficial pavement and topsoil layers described above, the subsurface underlying the site was found to consist of three (3) naturally occurring soil strata, referenced as Stratum I through Stratum III. Detailed descriptions of the subsurface conditions encountered, along with a profile of the test borings displaying the various strata and other information obtained from the field investigation, are presented on the Boring Logs included in Appendix C. A general description of the soils encountered is as follows.

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Stratum I – Brownish yellow to brownish gray sand, with varying amounts of silt (SM, SP, SP-SM, SW-SM, SW)

Stratum I was encountered within all of the test borings, directly below the surficial ground surface layer. In test borings H-1, H-3, H-5 and H-8 through H-10, Stratum I extended to the termination depth of approximately 10 feet bgs. Test borings H-11 and H-14 extended to a depth of approximately 13 feet bgs. Test borings H-4, H-6 and H-7 extended to a depth of approximately 18 feet bgs. Test boring H-20 extended to a depth of approximately 20 feet bgs. Test borings H-2 and H-13 extended to a depth of approximately 23 feet bgs. SPT N-values recorded while sampling the granular soils of Stratum I ranged from 2 to 46 blows per foot (bpf), indicating that these soils are in a very loose to dense state, overall, although it should be noted that the majority of Stratum I was found to be in a medium dense state. It should also be noted that a layer of geo-textile fabric was encountered within test boring H-8 at a depth of approximately 4 feet bgs, but was not encountered within any of the remaining borings completed at the site.

Laboratory testing, conducted on a representative sample of Stratum I, showed it to be moderately well-graded, and non-plastic. Additional details regarding the laboratory analysis of this soil are provided in Appendix D, and in Section 5.1 below.

Stratum II – Gray to yellowish brown well-graded sand, with varying amounts of silt, gravel

(SW-SM, SW)

Stratum II was encountered within test borings H-2, H-11, H-14 and H-15, directly below the soils of Stratum I. Stratum II was encountered within test boring H-7, directly below the soils of Stratum III, and extended to the termination depth of approximately 30 feet bgs. In test borings H-11, H-12 and H-15, Stratum II extended to a depth of approximately 23 feet bgs. In test boring H-14, Stratum II extended to a depth of approximately 28 feet bgs. In test boring H-2, Stratum II extended to the termination depth of approximately 30 feet bgs. SPT N-values recorded while sampling the granular soils of Stratum II ranged from 6 to 29 bpf, indicating that these soils are in a loose to medium dense state.

Laboratory testing, conducted on a representative sample of Stratum II, showed it to be well-graded, and non-plastic. Additional details regarding the laboratory analysis of this soil are provided in Appendix D, and in Section 5.1 below.

STRATUM III – Gray to brown silty sand, trace clay (SM, SC-SM, MH)

Stratum III was encountered within test borings H-4, H-6, H-7 and H-11 through H-15.

In test borings H-4, H-6, H-7, H-13, Stratum III was encountered directly below the soils of Stratum I. Within test boring H-4, H-6, and H-13, Stratum III extended to the termination depth, approximately 30 feet bgs. Test boring H-7 extended to a depth of approximately 23 feet bgs. In test borings H-11, H-12, H-14 and H-15, Stratum III was encountered directly below the soils of Stratum II and extended to their termination

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depth. SPT N-values recorded while sampling the primarily granular soils of Stratum III ranged from 2 to 30 bpf, indicating that these soils are in a very loose to dense state, overall, although it should be noted that the majority of Stratum III was found to be in a loose to medium dense state. Laboratory testing, conducted representative samples of Stratum III, showed it to be moderately well-graded and slightly plastic. Additional details regarding the laboratory analysis of this soil are provided in Appendix D, and in Section

5.1 below.

4.3 Bedrock

The bedrock surface was not encountered within any of the test borings performed at the site.

4.4 Groundwater

Groundwater was encountered within test borings H-2, H-4, H-6, H-7 and H-11 through H-15, ranging from approximately 14.2 to 21.5 feet bgs. Groundwater was not encountered within any of the remaining test borings performed at the site.

Groundwater readings were taken immediately following completion of each test boring, and additional readings were taken after a period of roughly 24 hours within test borings H-4, H-6, H-11, and H-13. It should be noted that groundwater table elevations may vary with daily, seasonal, and climatic variations.

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5.0 LABORATORY ANALYSES

ACER completed a laboratory testing program on representative soil samples obtained during our subsurface investigation. The results of these analyses are summarized below and the final results have been included in Appendix D.

5.1 Standard Classification of Soils

In order to supplement visual classifications, four (4) representative soil samples were subjected to laboratory testing in accordance with ASTM D2216, ASTM C117, ASTM C136, ASTM D 4318, and ASTM D2487 analyses. The results of the laboratory analyses have been summarized in Table 1 below and the final results have been included in Appendix D.

Table I Summary of Standard Classification of Soils

Sample Information

Boring Number H-2 H-4 H-12 H-15

Sample Number S-7 S-9 S-8 S-3

Sample Depths (ft.) 23’ – 25’ 25’ – 27’ 23’ – 25’ 4’ – 6’

Soil Type Stratum II Stratum III Stratum III Stratum I

Moisture Content Determination (ASTM D2216)

Moisture Content (%) 14.8 28.0 26.9 12.2

Particle Size Distribution (ASTM C117, ASTM C136)

Percent

Passing Sieve

1½” 100.0 100.0 100.0 100.0

3/4” 100.0 100.0 100.0 100.0

3/8” 99.4 100.0 100.0 100.0

No. 4 93.1 100.0 100.0 100.0

No. 10 78.2 99.8 100.0 100.0

No. 40 21.2 98.6 99.6 95.3

No. 100 7.6 88.4 85.9 77.9

No. 200 2.5 35.3 36.2 35.1

Atterberg Limits (ASTM D4318)

Liquid Limit (LL) NP 29 27 NP

Plastic Limit (PL) NP 25 25 NP

Plasticity Index (PI) NP 4 2 NP

Classification (ASTM D2487, ASTM D2488)

USCS Group Name

(Group Symbol)

Well-graded

Sand (SW)

Silty Sand

(SM)

Silty Sand

(SM)

Silty Sand

(SM)

NP = Non-plastic

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5.2 Modified Proctor & CBR Analyses

In order to evaluate the subsurface below the planned pavement improvements, five (5) composite bulk soil samples, referenced as BULK-H-101 through BULK-H-105, were obtained from the project area and subjected to Modified Proctor Analyses and California Bearing Ratio (CBR) Testing, in accordance with ASTM D 1557 and ASTM D 1883, respectively. Furthermore, each sample was assigned a USCS group symbol as per ASTM D 2488 (Visual-Manual Description of Soils). The results of these laboratory analyses are presented in Appendix D of this report, and have been summarized in Table 2 below.

Table 2 Summary of Modified Proctor & CBR Test Results

Bulk Sample

ID

Test Boring

Locations Depths*

USCS

Group

Symbol

Modified Proctor

Result

CBR

Value**

BULK-H-101 H-1, H-2, H-3 0’ – 2’ SM

125.7 pcf @ 8.5% optimum moisture 6.4

BULK-H-102 H-5, H-6, H-7 0’ – 2’ SM

119.8 pcf @ 8.7% optimum moisture 8.2

BULK-H-103 H-8, H-9, H-10 0’ – 2’ SM

121.2 pcf @ 10.0% optimum moisture 4.6

BULK-H-104 H-4, H-11, H-12 0’ – 2’ SM

110.5 pcf @ 5.3% optimum moisture 4.1

BULK-H-105 H-13, H-14, H-15 0’ – 2’ SM

111.4 pcf @ 11.2% optimum moisture 4.4

* Indicates depths below bottom of existing pavement section(s)

** CBR value determined at 95% compaction of soil based on Modified Proctor value

5.3 Environmental Analyses

As previously stated, a total of 15 soil samples were collected for environmental analyses, at the request of Merrick. One (1) sample was obtained from each test boring, and subsequently logged onto a sample chain-of custody form and submitted to Hampton Clarke Laboratories of Fairfield, New Jersey, a NJ DEP certified laboratory. All soil samples were analyzed for for VOC (EPA Method 8260), SVOC (EPA Method 8270 – B/N Extractables), TAL Metals with Cyanide (NJ) & Chromium 6 - Soil, Diesel Range Organics and Gasoline Range Organics (EPA Method 8015C). The samples were collected and analyzed in accordance with the NJ DEP regulations governing this work.

Between May 18 and June 4, 2018, Hampton Clarke Laboratories reported the results of their analyses. Tables 3a and 3b, presented below, compare the analytical results to the applicable NJDEP Soil Remediation Standards (SRS) and Default Impact to Ground Water

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Soil Screening Level (IGWSSL). Results in bold type indicate exceedances of their respective standards. The sample chain-of-custody form and preliminary analytical results have been presented in Appendix D.

Laboratory analyses revealed a concentration of aluminum in sample SS-H5 that exceeded the New Jersey IGWSSL standard, a concentration of mercury in sample SS-H9 that exceeded the New Jersey IGWSSL standard, and a concentration of cyanide in sample SS- H9 that exceeded the New Jersey IGWSSL standard. All remaining analyses revealed either no concentrations, or concentrations below the applicable NJDEP standards.

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Table 3a Environmental Analyses

CLIENT ID: SS-H1 SS-H2 SS-H3 SS-H4 SS-H5 SS-H6 SS-H7 SS-H8

LAB ID:

AD04102-

AD04102-

AD04144-

AD04111-

AD04144-

AD04111-

AD04111-

AD04144-

BORING LOCATION: H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8

SAMPLE DEPTH: 9.5’ – 10’ 19.5’ – 20’ 8’ – 8.5’ 23’ – 23.5’ 1’ – 1.5’ 14’ – 14.5’ 20’ – 20.5’ 4’ – 4.5’

COLLECTION DATE: 5/8/2018 5/8/2018 5/10/2018 5/9/2018 5/10/18 5/9/2018 5/9/2018 5/10/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Results

Metals

Mercury 23 65 0.1 ND ND ND ND ND ND ND ND

Aluminum 78,000 NA 6,000 1,300 1,500 1000 820 6,600 1,500 780 ND

Barium 16,000 59,000 2,100 ND ND ND ND ND ND ND 4,900

Calcium NA NA NA ND ND ND ND ND ND ND ND

Chromium NA NA NA 6.6 6.4 ND ND 16 ND ND ND

Cobalt 1,600 590 90 ND ND ND ND ND ND ND ND

Copper 3,100 45,000 11,000 ND ND ND ND ND ND ND ND

Iron NA NA NA 2,600 2,000 2,700 3,100 11,000 1,200 800 ND

Lead 400 800 90 ND ND ND ND ND ND ND ND

Magnesium NA NA NA ND ND ND ND ND ND ND ND

Manganese 11,000 5,900 65 ND ND ND ND 17 ND ND ND

Nickel 1,600 23,000 48 ND ND ND ND ND ND ND ND

Potassium NA NA NA ND ND ND ND ND ND ND 0.79

Sodium NA NA NA ND ND ND ND ND ND ND ND

Vanadium 78 1,100 NA ND ND ND ND 20 ND ND ND

Zinc 23,000 110,000 930 ND ND ND ND ND ND ND ND

Antimony 31 450 6 ND ND ND ND ND ND ND ND

Arsenic 19 19 19 0.62 0.27 1.4 0.26 2.8 0.3 0.46 ND

Beryllium 16 140 0.7 ND ND ND ND ND ND ND ND

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CLIENT ID: SS-H1 SS-H2 SS-H3 SS-H4 SS-H5 SS-H6 SS-H7 SS-H8

LAB ID:

AD04102-

AD04102-

AD04144-

AD04111-

AD04144-

AD04111-

AD04111-

AD04144-

BORING LOCATION: H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8

SAMPLE DEPTH: 9.5’ – 10’ 19.5’ – 20’ 8’ – 8.5’ 23’ – 23.5’ 1’ – 1.5’ 14’ – 14.5’ 20’ – 20.5’ 4’ – 4.5’

COLLECTION DATE: 5/8/2018 5/8/2018 5/10/2018 5/9/2018 5/10/18 5/9/2018 5/9/2018 5/10/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Results

Cadmium 78 78 2 ND ND ND ND ND ND ND ND

Selenium 390 5,700 11 ND ND ND ND ND ND ND 4,900

Silver 390 5,700 1 ND ND ND ND ND ND ND ND

Thallium NA NA 3 ND ND ND ND ND ND ND ND

SemiVolatiles

TotalSemiVolatileTic NA NA NA 20.0J 21.0J 130.0J 170.0J 160.0J 190.0J 200.0J 140.0J

1,1'-Biphenyl 61 240 140 ND ND ND ND ND ND ND ND 1,2,4,5- Tetrachlorobenzene

NA NA NA ND ND ND ND ND ND ND ND

2,3,4,6- Tetrachlorophenol

NA NA NA ND ND ND ND ND ND ND ND

2,4,5-Trichlorophenol 6,100 68,000 68 ND ND ND ND ND ND ND ND

2,4,6-Trichlorophenol 19 74 0.2 ND ND ND ND ND ND ND ND

2,4-Dichlorophenol 180 2,100 0.2 ND ND ND ND ND ND ND ND

2,4-Dimethylphenol 1,200 14,000 1 ND ND ND ND ND ND ND ND

2,4-Dinitrophenol 120 1,400 0.3 ND ND ND ND ND ND ND ND

2,4-Dinitrotoluene 0.7 3 0.2 ND ND ND ND ND ND ND ND

2,6-Dinitrotoluene 0.7 3 0.2 ND ND ND ND ND ND ND ND

2-Chloronaphthalene NA NA NA ND ND ND ND ND ND ND ND

2-Chlorophenol 310 2,200 0.8 ND ND ND ND ND ND ND ND

2-Methylnaphthalene 230 2,400 8 ND ND ND ND ND ND ND ND

2-Methylphenol 310 3,400 NA ND ND ND ND ND ND ND ND

2-Nitroaniline 39 23,000 NA ND ND ND ND ND ND ND ND

2-Nitrophenol NA NA NA ND ND ND ND ND ND ND ND

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CLIENT ID: SS-H1 SS-H2 SS-H3 SS-H4 SS-H5 SS-H6 SS-H7 SS-H8

LAB ID:

AD04102-

AD04102-

AD04144-

AD04111-

AD04144-

AD04111-

AD04111-

AD04144-

BORING LOCATION: H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8

SAMPLE DEPTH: 9.5’ – 10’ 19.5’ – 20’ 8’ – 8.5’ 23’ – 23.5’ 1’ – 1.5’ 14’ – 14.5’ 20’ – 20.5’ 4’ – 4.5’

COLLECTION DATE: 5/8/2018 5/8/2018 5/10/2018 5/9/2018 5/10/18 5/9/2018 5/9/2018 5/10/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Results

3&4-Methylphenol 31 340 NA ND ND ND ND ND ND ND ND

3,3'-Dichlorobenzidine 1 4 0.2 ND ND ND ND ND ND ND ND

3-Nitroaniline NA NA NA ND ND ND ND ND ND ND ND 4,6-Dinitro-2-methylphenol

6 68 0.3 ND ND ND ND ND ND ND ND

4-Bromophenyl-phenylether

NA NA NA ND ND ND ND ND ND ND ND

4-Chloro-3-methylphenol

NA NA NA ND ND ND ND ND ND ND ND

4-Chloroaniline NA NA NA ND ND ND ND ND ND ND ND 4-Chlorophenyl-phenylether

NA NA NA ND ND ND ND ND ND ND ND

4-Nitroaniline NA NA NA ND ND ND ND ND ND ND ND

4-Nitrophenol NA NA NA ND ND ND ND ND ND ND ND

Acenaphthene 3,400 37,000 110 ND ND ND ND ND ND ND ND

Acenaphthylene NA 300,000 NA ND ND 0.056 ND ND ND ND ND

Acetophenone 2 5 3 ND ND ND ND ND ND ND ND

Anthracene 17,000 30,000 2,400 ND ND ND ND ND ND ND ND

Atrazine 210 2,400 0.2 ND ND ND ND ND ND ND ND

Benzaldehyde 6,100 68,000 NA ND ND ND ND ND ND ND ND

Benzo[a]anthracene 5 17 0.8 ND ND 0.092 ND ND ND ND ND

Benzo[a]pyrene 0.5 2 0.2 ND ND 0.091 ND ND ND ND ND

Benzo[b]fluoranthene 5 17 2 ND ND 0.095 ND ND ND ND ND

Benzo[g,h,i]perylene 380,000 30,000 NA ND ND 0.081 ND ND ND ND ND

Benzo[k]fluoranthene 45 170 25 ND ND ND ND ND ND ND ND

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CLIENT ID: SS-H1 SS-H2 SS-H3 SS-H4 SS-H5 SS-H6 SS-H7 SS-H8

LAB ID:

AD04102-

AD04102-

AD04144-

AD04111-

AD04144-

AD04111-

AD04111-

AD04144-

BORING LOCATION: H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8

SAMPLE DEPTH: 9.5’ – 10’ 19.5’ – 20’ 8’ – 8.5’ 23’ – 23.5’ 1’ – 1.5’ 14’ – 14.5’ 20’ – 20.5’ 4’ – 4.5’

COLLECTION DATE: 5/8/2018 5/8/2018 5/10/2018 5/9/2018 5/10/18 5/9/2018 5/9/2018 5/10/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Results bis(2- Chloroethoxy)methane

NA NA NA ND ND ND ND ND ND ND ND

bis(2-Chloroethyl)ether 0.4 2 0.2 ND ND ND ND ND ND ND ND bis(2- Chloroisopropyl)ether

23 67 5 ND ND ND ND ND ND ND ND

bis(2- Ethylhexyl)phthalate

35 140 1,200 ND ND ND ND ND ND ND ND

Butylbenzylphthalate 1,200 14,000 230 ND ND ND ND ND ND ND ND

Caprolactam 31,000 340,000 12 ND ND ND ND ND ND ND ND

Carbazole 24 96 NA ND ND ND ND ND ND ND ND

Chrysene 450 1,700 80 ND ND 0.094 ND ND ND ND ND

Dibenzo[a,h]anthracene 0.5 2 0.8 ND ND ND ND ND ND ND ND

Dibenzofuran NA NA NA ND ND ND ND ND ND ND ND

Diethylphthalate 49,000 550,000 88 ND ND ND ND ND ND ND ND

Dimethylphthalate NA NA NA ND ND ND ND ND ND ND ND

Di-n-butylphthalate 6,100 68,000 760 ND ND ND ND ND ND ND ND

Di-n-octylphthalate 2,400 27,000 3,300 ND ND ND ND ND ND ND ND

Fluoranthene 2,300 24,000 1,300 ND ND 0.07 ND ND ND ND ND

Fluorene 2,300 24,000 170 ND ND ND ND ND ND ND ND

Hexachlorobenzene 0.3 1 0.2 ND ND ND ND ND ND ND ND

Hexachlorobutadiene 6 25 0.9 ND ND ND ND ND ND ND ND Hexachlorocyclopentadi ene

45 110 320 ND ND ND ND ND ND ND ND

Hexachloroethane 12 48 0.2 ND ND ND ND ND ND ND ND

Indeno[1,2,3-cd]pyrene 5 17 7 ND ND 0.047 ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H1 SS-H2 SS-H3 SS-H4 SS-H5 SS-H6 SS-H7 SS-H8

LAB ID:

AD04102-

AD04102-

AD04144-

AD04111-

AD04144-

AD04111-

AD04111-

AD04144-

BORING LOCATION: H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8

SAMPLE DEPTH: 9.5’ – 10’ 19.5’ – 20’ 8’ – 8.5’ 23’ – 23.5’ 1’ – 1.5’ 14’ – 14.5’ 20’ – 20.5’ 4’ – 4.5’

COLLECTION DATE: 5/8/2018 5/8/2018 5/10/2018 5/9/2018 5/10/18 5/9/2018 5/9/2018 5/10/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Results

Isophorone 510 2,000 0.2 ND ND ND ND ND ND ND ND

Naphthalene 6 17 25 ND ND ND ND ND ND ND ND

Nitrobenzene 5 14 0.2 ND ND ND ND ND ND ND ND N-Nitroso-di-n-propylamine

0.2 0.3 0.2 ND ND ND ND ND ND ND ND

N-Nitrosodiphenylamine 99 390 0.4 ND ND ND ND ND ND ND ND

Pentachlorophenol 0.9 3 0.3 ND ND ND ND ND ND ND ND

Phenanthrene NA 300,000 NA ND ND ND ND ND ND ND ND

Phenol 18,000 210,000 8 ND ND ND ND ND ND ND ND

Pyrene 1,700 18,000 840 ND ND 0.2 ND ND ND ND ND

TPH

Total Petroleum Hydrocarbons

NA NA NA ND ND ND ND ND ND ND ND

Gasoline Range Organics NA NA NA 18.0JB 16.0JB ND ND ND ND ND ND

Volatiles

TotalVolatileTic NA NA NA 0.017J ND ND 1.5J ND ND 0.0059J 0.0055J

1,1,1-Trichloroethane 160,000 NA 0.3 ND ND ND ND ND ND ND ND 1,1,2,2- Tetrachloroethane

1 3 0.007 ND ND ND ND ND ND ND ND

1,1,2-Trichloro-1,2,2-trifluoroethane

NA NA NA ND ND ND ND ND ND ND ND

1,1,2-Trichloroethane 2 6 0.02 ND ND ND ND ND ND ND ND

1,1-Dichloroethane 8 24 0.2 ND ND ND ND ND ND ND ND

1,1-Dichloroethene 11 150 0.008 ND ND ND ND ND ND ND ND

1,2,3-Trichlorobenzene NA NA NA ND ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H1 SS-H2 SS-H3 SS-H4 SS-H5 SS-H6 SS-H7 SS-H8

LAB ID:

AD04102-

AD04102-

AD04144-

AD04111-

AD04144-

AD04111-

AD04111-

AD04144-

BORING LOCATION: H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8

SAMPLE DEPTH: 9.5’ – 10’ 19.5’ – 20’ 8’ – 8.5’ 23’ – 23.5’ 1’ – 1.5’ 14’ – 14.5’ 20’ – 20.5’ 4’ – 4.5’

COLLECTION DATE: 5/8/2018 5/8/2018 5/10/2018 5/9/2018 5/10/18 5/9/2018 5/9/2018 5/10/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Results

1,2,4-Trichlorobenzene 73 820 0.7 ND ND ND ND ND ND ND ND 1,2-Dibromo-3-chloropropane

0.08 0.2 0.005 ND ND ND ND ND ND ND ND

1,2-Dibromoethane 0.008 0.04 0.005 ND ND ND ND ND ND ND ND

1,2-Dichlorobenzene 5,300 59,000 17 ND ND ND ND ND ND ND ND

1,2-Dichloroethane 0.9 3 0.005 ND ND ND ND ND ND ND ND

1,2-Dichloropropane 2 5 0.005 ND ND ND ND ND ND ND ND

1,3-Dichlorobenzene 5,300 59,000 19 ND ND ND ND ND ND ND ND

1,4-Dichlorobenzene 5 13 2 ND ND ND ND ND ND ND ND

1,4-Dioxane NA NA NA ND ND ND ND ND ND ND ND

2-Butanone 3,100 44,000 0.9 ND ND ND ND ND ND ND ND

2-Hexanone NA NA NA ND ND ND ND ND ND ND ND

4-Methyl-2-pentanone NA NA NA ND ND ND ND ND ND ND ND

Acetone 70,000 NA 19 ND ND ND ND ND ND ND ND

Benzene 2 5 0.005 ND ND ND ND ND ND ND ND

Bromochloromethane NA NA NA ND ND ND ND ND ND ND ND

Bromodichloromethane 1 3 0.005 ND ND ND ND ND ND ND ND

Bromoform 81 280 0.03 ND ND ND ND ND ND ND ND

Bromomethane 25 59 0.04 ND ND ND ND ND ND ND ND

Carbon disulfide 7,800 110,000 6 ND ND ND ND ND ND ND ND

Carbon tetrachloride 2 4 0.005 ND ND ND ND ND ND ND ND

Chlorobenzene 510 7,400 0.6 ND ND ND ND ND ND ND ND

Chloroethane 220 1,100 NA ND ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H1 SS-H2 SS-H3 SS-H4 SS-H5 SS-H6 SS-H7 SS-H8

LAB ID:

AD04102-

AD04102-

AD04144-

AD04111-

AD04144-

AD04111-

AD04111-

AD04144-

BORING LOCATION: H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8

SAMPLE DEPTH: 9.5’ – 10’ 19.5’ – 20’ 8’ – 8.5’ 23’ – 23.5’ 1’ – 1.5’ 14’ – 14.5’ 20’ – 20.5’ 4’ – 4.5’

COLLECTION DATE: 5/8/2018 5/8/2018 5/10/2018 5/9/2018 5/10/18 5/9/2018 5/9/2018 5/10/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Results

Chloroform 0.6 2 0.4 ND ND ND ND ND ND ND ND

Chloromethane 4 12 NA ND ND ND ND ND ND ND ND cis-1,2-Dichloroethene 230 560 0.3 ND ND ND ND ND ND ND ND cis-1,3-Dichloropropene 2 7 0.005 ND ND ND ND ND ND ND ND

Cyclohexane NA NA NA ND ND ND ND ND ND ND ND Dibromochloro-methane 3 8 0.005 ND ND ND ND ND ND ND ND

Dichlorodifluoro-methane

490 230,000 39 ND ND ND ND ND ND ND ND

Ethylbenzene 7,800 110,000 13 ND ND ND ND ND ND ND ND

Isopropylbenzene NA NA NA ND ND ND ND ND ND ND ND m&p-Xylenes 12,000 170,000 19 ND ND ND ND ND ND ND ND

Methyl Acetate 78,000 NA 22 ND ND ND ND ND ND ND ND

Methylcyclohexane NA NA NA ND ND ND ND ND ND ND ND

Methylene chloride 46 230 0.01 ND ND ND ND ND ND ND ND

Methyl-t-butyl ether 110 320 0.2 ND ND ND ND ND ND ND ND o-Xylene 12,000 170,000 19 ND ND ND ND ND ND ND ND

Styrene 90 260 3 ND ND ND ND ND ND ND ND

Tetrachloroethene 43 1,500 0.005 ND ND ND ND ND ND ND ND

Toluene 6,300 91,000 7 ND ND ND ND ND ND ND ND trans-1,2- Dichloroethene

300 720 0.6 ND ND ND ND ND ND ND ND

trans-1,3- Dichloropropene

2 7 0.005 ND ND ND ND ND ND ND ND

Trichloroethene 3 10 0.01 ND ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H1 SS-H2 SS-H3 SS-H4 SS-H5 SS-H6 SS-H7 SS-H8

LAB ID:

AD04102-

AD04102-

AD04144-

AD04111-

AD04144-

AD04111-

AD04111-

AD04144-

BORING LOCATION: H-1 H-2 H-3 H-4 H-5 H-6 H-7 H-8

SAMPLE DEPTH: 9.5’ – 10’ 19.5’ – 20’ 8’ – 8.5’ 23’ – 23.5’ 1’ – 1.5’ 14’ – 14.5’ 20’ – 20.5’ 4’ – 4.5’

COLLECTION DATE: 5/8/2018 5/8/2018 5/10/2018 5/9/2018 5/10/18 5/9/2018 5/9/2018 5/10/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Results Trichlorofluoro-methane

23,000 340,000 34 ND ND ND ND ND ND ND ND

Vinyl chloride 0.7 2 0.005 ND ND ND ND ND ND ND ND

Xylenes (Total) 12,000 170,000 19 ND ND ND ND ND ND ND ND

Wet Chemistry

% Solids NA NA NA 93% 86% 90% 84% 81% 84% 82% 92%

Cyanide 47 680 20 ND ND ND ND ND ND ND ND pH NA NA NA 5.0(PH) 6.9(PH) 6.1(PH) 6.2(PH) 6.7(PH) 5.7(PH) 5.9(PH) 5.1(PH)

Temperature NA NA NA 24(C) 24(C) 23(C) 23(C) 23(C) 23(C) 23(C) 23(C)

Cr (Hexavalent) NA NA NA ND ND ND ND ND ND ND ND

Other Parameters Oxidation Reduction Potential

NA NA NA 420 (MV) 390(MV) 310(MV) 290(MV) 310(MV) 330(MV) 290(MV) 410(MV)

ID – Identification RSRS – Residential Soil Remediation Standard ND – Not Detected NRSRS – Non-Residential Soil Remediation Standard IGWSSL – Impact to Groundwater Soil Screening Level

ACER ASSOCIATES, LLC

Table 3b Environmental Analyses

CLIENT ID: SS-H9 SS-H10 SS-H11 SS-H12 SS-H13 SS-H14 SS-H15

LAB ID:

AD04102-

AD04102-

AD04102-

AD04056-

AD04056-

AD04056-

AD04056-

BORING LOCATION: H-9 H-10 H-11 H-12 H-13 H-14 H-15

SAMPLE DEPTH: 9.5’ – 10’ 9.5’ -10’ 1.5’ – 2’ 21.5’ – 22’ 5’ – 5.5’ 4’ – 4.5’ 19.5’ – 20’

COLLECTION DATE: 5/8/2018 5/8/2018 5/8/2018 5/7/2018 5/7/2018 5/7/2018 5/7/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results

Metals

Mercury 23 65 0.1 9.6 ND ND ND ND ND ND

Aluminum 78,000 NA 6,000 4,300 1,800 3,300 2,600 1,300 930 780

Barium 16,000 59,000 2,100 31 ND ND ND ND ND ND

Calcium NA NA NA 13,000 ND 1,200 ND ND ND ND

Chromium NA NA NA 25 12 11 9.6 ND ND ND

Cobalt 1,600 590 90 ND ND ND ND ND ND ND

Copper 3,100 45,000 11,000 13 ND 7.4 ND ND ND ND

Iron NA NA NA 6,800 3,400 4,900 3,200 1,500 1,300 480

Lead 400 800 90 40 ND 11 ND ND ND ND

Magnesium NA NA NA 2,100 ND 990 ND ND ND ND

Manganese 11,000 5,900 65 41 ND 40 ND ND ND ND

Nickel 1,600 23,000 48 ND ND ND ND ND ND ND

Potassium NA NA NA ND ND ND ND ND ND ND

Sodium NA NA NA ND ND ND ND ND ND ND

Vanadium 78 1,100 NA 15 ND 17 ND ND ND ND

Zinc 23,000 110,000 930 53 ND 120 ND ND ND ND

Antimony 31 450 6 ND ND ND ND ND ND ND

Arsenic 19 19 19 5.6 1.8 1.2 1.4 3.2 0.73 ND

Beryllium 16 140 0.7 ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H9 SS-H10 SS-H11 SS-H12 SS-H13 SS-H14 SS-H15

LAB ID:

AD04102-

AD04102-

AD04102-

AD04056-

AD04056-

AD04056-

AD04056-

BORING LOCATION: H-9 H-10 H-11 H-12 H-13 H-14 H-15

SAMPLE DEPTH: 9.5’ – 10’ 9.5’ -10’ 1.5’ – 2’ 21.5’ – 22’ 5’ – 5.5’ 4’ – 4.5’ 19.5’ – 20’

COLLECTION DATE: 5/8/2018 5/8/2018 5/8/2018 5/7/2018 5/7/2018 5/7/2018 5/7/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results

Cadmium 78 78 2 0.59 ND ND ND ND ND ND

Selenium 390 5,700 11 ND ND ND ND ND ND ND

Silver 390 5,700 1 ND ND ND ND ND ND ND

Thallium NA NA 3 ND ND ND ND ND ND ND

SemiVolatiles

TotalSemiVolatileTic NA NA NA 33.0J 23.0J 18.0J 30.0J 25.0J 25.0J 28.0J

1,1'-Biphenyl 61 240 140 ND ND ND ND ND ND ND 1,2,4,5- Tetrachlorobenzene

NA NA NA ND ND ND ND ND ND ND

2,3,4,6- Tetrachlorophenol

NA NA NA ND ND ND ND ND ND ND

2,4,5-Trichlorophenol 6,100 68,000 68 ND ND ND ND ND ND ND

2,4,6-Trichlorophenol 19 74 0.2 ND ND ND ND ND ND ND

2,4-Dichlorophenol 180 2,100 0.2 ND ND ND ND ND ND ND

2,4-Dimethylphenol 1,200 14,000 1 ND ND ND ND ND ND ND

2,4-Dinitrophenol 120 1,400 0.3 ND ND ND ND ND ND ND

2,4-Dinitrotoluene 0.7 3 0.2 ND ND ND ND ND ND ND

2,6-Dinitrotoluene 0.7 3 0.2 ND ND ND ND ND ND ND

2-Chloronaphthalene NA NA NA ND ND ND ND ND ND ND

2-Chlorophenol 310 2,200 0.8 ND ND ND ND ND ND ND

2-Methylnaphthalene 230 2,400 8 ND ND ND ND ND ND ND

2-Methylphenol 310 3,400 NA ND ND ND ND ND ND ND

2-Nitroaniline 39 23,000 NA ND ND ND ND ND ND ND

2-Nitrophenol NA NA NA ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H9 SS-H10 SS-H11 SS-H12 SS-H13 SS-H14 SS-H15

LAB ID:

AD04102-

AD04102-

AD04102-

AD04056-

AD04056-

AD04056-

AD04056-

BORING LOCATION: H-9 H-10 H-11 H-12 H-13 H-14 H-15

SAMPLE DEPTH: 9.5’ – 10’ 9.5’ -10’ 1.5’ – 2’ 21.5’ – 22’ 5’ – 5.5’ 4’ – 4.5’ 19.5’ – 20’

COLLECTION DATE: 5/8/2018 5/8/2018 5/8/2018 5/7/2018 5/7/2018 5/7/2018 5/7/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results

3&4-Methylphenol 31 340 NA ND ND ND ND ND ND ND

3,3'-Dichlorobenzidine 1 4 0.2 ND ND ND ND ND ND ND

3-Nitroaniline NA NA NA ND ND ND ND ND ND ND 4,6-Dinitro-2-methylphenol

6 68 0.3 ND ND ND ND ND ND ND

4-Bromophenyl-phenylether

NA NA NA ND ND ND ND ND ND ND

4-Chloro-3-methylphenol

NA NA NA ND ND ND ND ND ND ND

4-Chloroaniline NA NA NA ND ND ND ND ND ND ND 4-Chlorophenyl-phenylether

NA NA NA ND ND ND ND ND ND ND

4-Nitroaniline NA NA NA ND ND ND ND ND ND ND

4-Nitrophenol NA NA NA ND ND ND ND ND ND ND

Acenaphthene 3,400 37,000 110 ND ND ND ND ND ND ND

Acenaphthylene NA 300,000 NA ND ND ND ND ND ND ND

Acetophenone 2 5 3 ND ND ND ND ND ND ND

Anthracene 17,000 30,000 2,400 ND ND ND ND ND ND ND

Atrazine 210 2,400 0.2 ND ND ND ND ND ND ND

Benzaldehyde 6,100 68,000 NA ND ND ND ND ND ND ND

Benzo[a]anthracene 5 17 0.8 0.062 ND ND ND 0.037 ND ND

Benzo[a]pyrene 0.5 2 0.2 ND ND ND ND ND ND ND

Benzo[b]fluoranthene 5 17 2 0.055 ND ND ND 0.04 ND ND

Benzo[g,h,i]perylene 380,000 30,000 NA ND ND ND ND ND ND ND

Benzo[k]fluoranthene 45 170 25 ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H9 SS-H10 SS-H11 SS-H12 SS-H13 SS-H14 SS-H15

LAB ID:

AD04102-

AD04102-

AD04102-

AD04056-

AD04056-

AD04056-

AD04056-

BORING LOCATION: H-9 H-10 H-11 H-12 H-13 H-14 H-15

SAMPLE DEPTH: 9.5’ – 10’ 9.5’ -10’ 1.5’ – 2’ 21.5’ – 22’ 5’ – 5.5’ 4’ – 4.5’ 19.5’ – 20’

COLLECTION DATE: 5/8/2018 5/8/2018 5/8/2018 5/7/2018 5/7/2018 5/7/2018 5/7/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results bis(2- Chloroethoxy)methane

NA NA NA ND ND ND ND ND ND ND

bis(2-Chloroethyl)ether 0.4 2 0.2 ND ND ND ND ND ND ND bis(2- Chloroisopropyl)ether

23 67 5 ND ND ND ND ND ND ND

bis(2- Ethylhexyl)phthalate

35 140 1,200 0.21 ND ND ND ND ND ND

Butylbenzylphthalate 1,200 14,000 230 ND ND ND ND ND ND ND

Caprolactam 31,000 340,000 12 ND ND ND ND ND ND ND

Carbazole 24 96 NA ND ND ND ND ND ND ND

Chrysene 450 1,700 80 0.058 ND ND ND 0.037 ND ND

Dibenzo[a,h]anthracene 0.5 2 0.8 ND ND ND ND ND ND ND

Dibenzofuran NA NA NA ND ND ND ND ND ND ND

Diethylphthalate 49,000 550,000 88 ND ND ND ND ND ND ND

Dimethylphthalate NA NA NA ND ND ND ND ND ND ND

Di-n-butylphthalate 6,100 68,000 760 ND ND ND ND ND ND ND

Di-n-octylphthalate 2,400 27,000 3,300 ND ND ND ND ND ND ND

Fluoranthene 2,300 24,000 1,300 0.18 ND ND ND 0.071 ND ND

Fluorene 2,300 24,000 170 ND ND ND ND ND ND ND

Hexachlorobenzene 0.3 1 0.2 ND ND ND ND ND ND ND

Hexachlorobutadiene 6 25 0.9 ND ND ND ND ND ND ND Hexachlorocyclopentadi ene

45 110 320 ND ND ND ND ND ND ND

Hexachloroethane 12 48 0.2 ND ND ND ND ND ND ND

Indeno[1,2,3-cd]pyrene 5 17 7 ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H9 SS-H10 SS-H11 SS-H12 SS-H13 SS-H14 SS-H15

LAB ID:

AD04102-

AD04102-

AD04102-

AD04056-

AD04056-

AD04056-

AD04056-

BORING LOCATION: H-9 H-10 H-11 H-12 H-13 H-14 H-15

SAMPLE DEPTH: 9.5’ – 10’ 9.5’ -10’ 1.5’ – 2’ 21.5’ – 22’ 5’ – 5.5’ 4’ – 4.5’ 19.5’ – 20’

COLLECTION DATE: 5/8/2018 5/8/2018 5/8/2018 5/7/2018 5/7/2018 5/7/2018 5/7/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results

Isophorone 510 2,000 0.2 ND ND ND ND ND ND ND

Naphthalene 6 17 25 1.7 ND ND ND ND ND ND

Nitrobenzene 5 14 0.2 ND ND ND ND ND ND ND N-Nitroso-di-n-propylamine

0.2 0.3 0.2 ND ND ND ND ND ND ND

N-Nitrosodiphenylamine 99 390 0.4 ND ND ND ND ND ND ND

Pentachlorophenol 0.9 3 0.3 ND ND ND ND ND ND ND

Phenanthrene NA 300,000 NA 0.12 ND ND ND 0.051 ND ND

Phenol 18,000 210,000 8 ND ND ND ND ND ND ND

Pyrene 1,700 18,000 840 0.16 ND ND ND 0.065 ND ND

TPH

Total Petroleum Hydrocarbons

NA NA NA 300 ND ND ND ND ND ND

Gasoline Range Organics NA NA NA 32.0JB 25.0JB 16.0JB 15.0JB 14.0JB 13.0JB 11.0JB

Volatiles

TotalVolatileTic NA NA NA 1.5J 0.045J 0.012J 0.013J 0.19J 0.0085J 0.0075J

1,1,1-Trichloroethane 160,000 NA 0.3 ND ND ND ND ND ND ND 1,1,2,2- Tetrachloroethane

1 3 0.007 ND ND ND ND ND ND ND

1,1,2-Trichloro-1,2,2-trifluoroethane

NA NA NA ND ND ND ND ND ND ND

1,1,2-Trichloroethane 2 6 0.02 ND ND ND ND ND ND ND

1,1-Dichloroethane 8 24 0.2 ND ND ND ND ND ND ND

1,1-Dichloroethene 11 150 0.008 ND ND ND ND ND ND ND

1,2,3-Trichlorobenzene NA NA NA ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H9 SS-H10 SS-H11 SS-H12 SS-H13 SS-H14 SS-H15

LAB ID:

AD04102-

AD04102-

AD04102-

AD04056-

AD04056-

AD04056-

AD04056-

BORING LOCATION: H-9 H-10 H-11 H-12 H-13 H-14 H-15

SAMPLE DEPTH: 9.5’ – 10’ 9.5’ -10’ 1.5’ – 2’ 21.5’ – 22’ 5’ – 5.5’ 4’ – 4.5’ 19.5’ – 20’

COLLECTION DATE: 5/8/2018 5/8/2018 5/8/2018 5/7/2018 5/7/2018 5/7/2018 5/7/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results

1,2,4-Trichlorobenzene 73 820 0.7 ND ND ND ND ND ND ND 1,2-Dibromo-3-chloropropane

0.08 0.2 0.005 ND ND ND ND ND ND ND

1,2-Dibromoethane 0.008 0.04 0.005 ND ND ND ND ND ND ND

1,2-Dichlorobenzene 5,300 59,000 17 ND ND ND ND ND ND ND

1,2-Dichloroethane 0.9 3 0.005 ND ND ND ND ND ND ND

1,2-Dichloropropane 2 5 0.005 ND ND ND ND ND ND ND

1,3-Dichlorobenzene 5,300 59,000 19 ND ND ND ND ND ND ND

1,4-Dichlorobenzene 5 13 2 ND ND ND ND ND ND ND

1,4-Dioxane NA NA NA ND ND ND ND ND ND ND

2-Butanone 3,100 44,000 0.9 ND ND ND ND ND ND ND

2-Hexanone NA NA NA ND ND ND ND ND ND ND

4-Methyl-2-pentanone NA NA NA ND ND ND ND ND ND ND

Acetone 70,000 NA 19 0.076 ND ND ND ND ND ND

Benzene 2 5 0.005 ND ND ND ND ND ND ND

Bromochloromethane NA NA NA ND ND ND ND ND ND ND

Bromodichloromethane 1 3 0.005 ND ND ND ND ND ND ND

Bromoform 81 280 0.03 ND ND ND ND ND ND ND

Bromomethane 25 59 0.04 ND ND ND ND ND ND ND

Carbon disulfide 7,800 110,000 6 0.017 ND ND ND ND ND ND

Carbon tetrachloride 2 4 0.005 ND ND ND ND ND ND ND

Chlorobenzene 510 7,400 0.6 ND ND ND ND ND ND ND

Chloroethane 220 1,100 NA ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H9 SS-H10 SS-H11 SS-H12 SS-H13 SS-H14 SS-H15

LAB ID:

AD04102-

AD04102-

AD04102-

AD04056-

AD04056-

AD04056-

AD04056-

BORING LOCATION: H-9 H-10 H-11 H-12 H-13 H-14 H-15

SAMPLE DEPTH: 9.5’ – 10’ 9.5’ -10’ 1.5’ – 2’ 21.5’ – 22’ 5’ – 5.5’ 4’ – 4.5’ 19.5’ – 20’

COLLECTION DATE: 5/8/2018 5/8/2018 5/8/2018 5/7/2018 5/7/2018 5/7/2018 5/7/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results

Chloroform 0.6 2 0.4 ND ND ND ND ND ND ND

Chloromethane 4 12 NA ND ND ND ND ND ND ND cis-1,2-Dichloroethene 230 560 0.3 ND ND ND ND ND ND ND cis-1,3-Dichloropropene 2 7 0.005 ND ND ND ND ND ND ND

Cyclohexane NA NA NA ND ND ND ND ND ND ND Dibromochloro-methane 3 8 0.005 ND ND ND ND ND ND ND

Dichlorodifluoro-methane

490 230,000 39 ND ND ND ND ND ND ND

Ethylbenzene 7,800 110,000 13 ND ND ND ND ND ND ND

Isopropylbenzene NA NA NA ND ND ND ND ND ND ND m&p-Xylenes 12,000 170,000 19 ND ND ND ND ND ND ND

Methyl Acetate 78,000 NA 22 ND ND ND ND ND ND ND

Methylcyclohexane NA NA NA ND ND ND ND ND ND ND

Methylene chloride 46 230 0.01 ND ND ND ND ND ND ND

Methyl-t-butyl ether 110 320 0.2 ND ND ND ND ND ND ND o-Xylene 12,000 170,000 19 ND ND ND ND ND ND ND

Styrene 90 260 3 ND ND ND ND ND ND ND

Tetrachloroethene 43 1,500 0.005 ND ND ND ND ND ND ND

Toluene 6,300 91,000 7 ND ND ND ND ND ND ND trans-1,2- Dichloroethene

300 720 0.6 ND ND ND ND ND ND ND

trans-1,3- Dichloropropene

2 7 0.005 ND ND ND ND ND ND ND

Trichloroethene 3 10 0.01 ND ND ND ND ND ND ND

ACER ASSOCIATES, LLC

CLIENT ID: SS-H9 SS-H10 SS-H11 SS-H12 SS-H13 SS-H14 SS-H15

LAB ID:

AD04102-

AD04102-

AD04102-

AD04056-

AD04056-

AD04056-

AD04056-

BORING LOCATION: H-9 H-10 H-11 H-12 H-13 H-14 H-15

SAMPLE DEPTH: 9.5’ – 10’ 9.5’ -10’ 1.5’ – 2’ 21.5’ – 22’ 5’ – 5.5’ 4’ – 4.5’ 19.5’ – 20’

COLLECTION DATE: 5/8/2018 5/8/2018 5/8/2018 5/7/2018 5/7/2018 5/7/2018 5/7/2018

SAMPLE MATRIX: Soil Soil Soil Soil Soil Soil Soil

SAMPLE UNITS: mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg

Constituents RSRS NRSRS IGWSSL Results Results Results Results Results Results Results Trichlorofluoro-methane

23,000 340,000 34 ND ND ND ND ND ND ND

Vinyl chloride 0.7 2 0.005 ND ND ND ND ND ND ND

Xylenes (Total) 12,000 170,000 19 ND ND ND ND ND ND ND

Wet Chemistry

% Solids NA NA NA 71% 80% 85% 81% 91% 94% 81%

Cyanide 47 680 20 40 ND ND ND ND ND ND pH NA NA NA 6.8(PH) 5.4(PH) 8.3(PH) 5.6(pH) 7.2(pH) 5.5(pH) 5.7(pH)

Temperature NA NA NA 24(C) 24(C) 24(C) 24(C) 24(C) 24(C) 24(C)

Cr (Hexavalent) NA NA NA ND ND ND ND ND ND ND

Other Parameters Oxidation Reduction Potential

NA NA NA 230(MV) 390(MV) 300(MV) 320(MV) 320(MV) 400(MV) 410(MV)

ID – Identification RSRS – Residential Soil Remediation Standard ND – Not Detected NRSRS – Non-Residential Soil Remediation Standard IGWSSL – Impact to Groundwater Soil Screening Level

ACER ASSOCIATES, LLC

5.4 Corrosivity Testing of Soils & Analysis

In order to determine the corrosion potential of the soils underlying the project area, a two (2) additional composite bulk soil samples, referenced as BULK-H-106 and BULK-H-107, were subjected to a suite of testing for corrosivity. The Corrosion Test Suite included the Standard Test for pH of Soils (ASTM D 4972), Water-Soluble Sulfate in Soil (ASTM C 1580), Water-Soluble Chloride in Soil (AASHTO T 291) and Electrical Resistivity of Soils (AASHTO T 288). A summary of the test results are presented below in Table 4, and in Appendix D of this report.

Table 4 Summary of Corrosion Test Suite Results

Bulk

Sample

ID

Test

Boring

Locations

Depths* As Rec’d

Moisture pH Sulfates Chlorides Resistivity

BULK-H-

H-2, H-4, H-6, H-7 0’ – 10’ 7.5% 7.6 55 ppm <30 ppm

254,285 ohm-cm

BULK-H-

H-11, H-12, H-13, H-14, H-15

0’ – 10’ 8.8% 7.5 54 ppm <30 ppm 203,428 ohm-cm

* Indicates depths below ground surface (bgs)

The corrosivity of soils may be generally characterized by using the parameter of soil resistivity as the primary indicator of the potential severity of corrosion to cast iron alloy pipes. Soil resistivity values below 1,000 ohm-cm are indicative of soils that are potentially “extremely corrosive”, whereas soil resistivity values exceeding 20,000 ohm-cm are found in soils that are characterized as “essentially non-corrosive”. Furthermore, based on the American Water Works Association (AWWA) C-105 standard for corrosivity, low risk soils typically have pH values between 4 and 8.5, as well as oxygen reducing (“redox”) potential values exceeding 100 millivolts (mV), and generally consist of well-drained soils.

Based on the resistivity and pH values reported in Table 4, the recorded moisture contents and composition of the Stratum I soils as described in Section 4.2, as well as the oxygen reducing potential values reported for the environmental samples collected at the site as summarized in Tables 3a and 3b above, it is ACER’s opinion that the soils obtained from the project area should be considered essentially non-corrosive.

ACER ASSOCIATES, LLC

6.0 DESIGN PARAMETERS & RECOMMENDATIONS

The geotechnical investigation has revealed that the proposed construction area is underlain by the primarily granular soils of Stratum I, Stratum II and Stratum III. Based on the data collected during this investigation, as well as the laboratory analyses performed, ACER has prepared recommendations for design of the two (2) proposed hangar bays, the administrative area of the proposed construction, and pavement design recommendations for the planned improvements at the site. All recommendations presented in this section are provided under the premise that the guidelines for construction, as outlined in Section 7.0, are carefully followed.

6.1 Two-Bay Hangar

As previously discussed, Merrick has indicated that typical column loads of 550 kips are expected for the hangar bays, with at least one column load estimated to be as high as 980 kips, and distances between the majority of the columns have been estimated to range from approximately 15.3 feet to 33.5 feet.

As previously discussed, test borings H-2, H-4, H-6, H-7, and H-11 through H-15 were installed within the general, anticipated location of the proposed two-bay MX hangar structure, and were advanced to depths ranging from approximately 30 to 32 feet below ground surface (bgs). It should be noted that each of these borings was initially scheduled to extend to a depth of approximately 30 feet bgs, based on the scope of work requested by Merrick at the outset of the project. Following completion of the field investigation, Merrick provided ACER within additional details regarding the planned construction, including the anticipated column loads for the two (2) hangar bays.

Within the limits of the depths investigated, ACER has evaluated the subsurface profile underlying the…