02_25R1303_02 61 13_AMD0009.pdf

FY24 MCON P-614 JOINT CONSOLIDATED COMMUNICATIONS CENTER 1737021

JOINT REGION MARIANAS, ANDERSEN AIR FORCE BASE

SECTION 02 61 13

EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL

02/10, CHG 1: 02/21

PART 1 GENERAL

1.1 MEASUREMENT AND PAYMENT

1.1.1 Measurement

Base measurement for excavation and onsite transportation on the actual number of cubic yards of contaminated material in-place prior to excavation. Base determination of the volume of contaminated material excavated on cross-sectional volume determination reflecting the differential between the original elevations of the top of the contaminated material and the final elevations after removal of the contaminated material. Base measurement for backfilling of excavated areas on in-place cubic yards of compacted fill.

1.1.2 Payment

1.1.2.1 Excavation and Transportation

Compensation for excavation and onsite transportation of contaminated material will be paid as a unit cost. Include any other items incidental to excavation and handling not defined as having a specific unit cost.

1.1.2.2 Backfilling

Compensation for backfill soil, transportation of backfill, backfill soil conditioning, backfilling, compaction, and geotechnical testing will be paid as a single unit cost.

1.1.2.3 Stockpiling

Compensation for construction of stockpile areas will be paid for as a unit cost. Include all aspects of grading, preparation, handling, placement, maintenance, removal, treatment, and disposal of stockpile cover materials and liner materials and all other items incidental to construction of stockpiles in the unit cost.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM D5434 (2012) Field Logging of Subsurface Explorations of Soil and Rock

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2024) Safety -- Safety and Health Requirements Manual

SECTION 02 61 13 Page 1

Amendment No. 0009 02 61 13 EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL, dated April 18, 2025

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1926 Safety and Health Regulations for Construction

40 CFR 302 Designation, Reportable Quantities, and Notification

1.3 DESCRIPTION OF WORK

The extent of soil excavation will be limited to the designated depth and width to complete the construction. Excavated soil material will be moved within AAFB to the North Ramp stockpile area. Any excess soil that is intended for reuse or disposal will be evaluated for potential soil contamination in accordance with the approved work plan. Approximate locations and chracterization data of contaminated material are shown on the Hazardous Material Survey and Soil Screening Report for FY24 MCON Project P-614 Guam Joint Consolidated Communication Center. Submit a Work Plan as specified below. Notify the Contracting Officer within 24 hours, and before excavation, if contaminated material is discovered that has not been previously identified or if other discrepancies between data provided and actual field conditions are discovered. Backfill material is available onsite after evaluation. Ground water is not expected to be encountered, however, if any perched water table is encountered during earthwork, care must be exercised to avoid ingestion, inhalation (of mist), or direct dermal contact, until it is determined clean by sampling and analysis. Tropical Pacific Environmental Screening Level (TPESL) shall be used as action level..

1.3.1 Scheduling

Notify the Contracting Officer 14 calendar days prior to the start of excavation of contaminated material. The Contracting Officer is responsible for contacting regulatory agencies in accordance with the applicable reporting requirements.

1.3.2 Work Plan

Submit a Work Plan within 30 calendar days after notice to proceed. Do not perform work at the site, except for site inspections and surveys, until the Work Plan is approved. Allow 30 calendar days in the schedule for the Government's review. No adjustment for time or money will be made if resubmittals of the Work Plan are required due to deficiencies in the plan. At a minimum, include the following in the Work Plan:

a. Schedule of activities.

b. Method of excavation and equipment to be used.

c. Shoring or side-wall slopes proposed.

d. Dewatering plan.

e. Storage methods and locations for liquid and solid contaminated material.

f. Borrow sources and haul routes.

g. Decontamination procedures.

SECTION 02 61 13 Page 2

h. Spill contingency plan.

1.3.3 Other Submittal Requirements

Submit separate cross-sections of each area before and after excavation and after backfilling, test results, and two copies of the Closure Report within 14 calendar days of earthwork completion at the site.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" classification.

Submittals not having a "G" classification are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Work Plan; G

SD-02 Shop Drawings

Surveys

SD-06 Test Reports

Compaction; G

Closure Report; G

1.5 REGULATORY REQUIREMENTS

1.5.1 Permits and Licenses

In coordination with the Contracting Officer, obtain required federal, state, and local permits for excavation and storage of contaminated material. Obtain permits at no additional cost to the Government.

1.5.2 Air Emissions

Monitor and control air emissions in accordance with Section 01 57 19

TEMPORARY ENVIRONMENTAL CONTROLS.

PART 2 PRODUCTS

2.1 SPILL RESPONSE MATERIALS

Provide appropriate spill response materials including, but not limited to the following: containers, adsorbents, shovels, and personal protective equipment. Make spill response materials available at all times when contaminated materials/wastes are being handled or transported. Provide spill response materials that are compatible with the type of materials and contaminants being handled.

2.2 BACKFILL

If offsite fill material is required, backfill material must be obtained from offsite sources approved by the Contracting Officer. Imported soils used for backfill must be certified to be "free" from hazardous substances

SECTION 02 61 13 Page 3

{i.e. below TPESL for Unrestricted Land Use, either by the supplier, or through sampling and analysis of the materials}

Supplier testing or other testing of off-site materials must include, but not be limited to, pesticides, petroleum hydrocarbons, polynuclear aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB), heavy metals, and other chemicals of potential concern. An alternative to supplier certification is representative sampling and analysis of source materials prior to transport. The frequency for the testing of an imported clean fill stockpile or borrow area is one sample per 400 cubic yards.

Collection of samples must be performed by multi-increment sampling strategy for each sample submitted for laboratory analysis(e.g. at least 75 increments (subsamples) per bulk sample analyzed).

A report for Sampling and Analysis for Imported soils must be submitted to the Contracting Officer. The detailed sampling procedures and the origin/history of the borrow material must be included in the report.

Provide photographs and location maps for the origin of borrow materials.

Provide all necessary soil sampling and analysis results for the COPC.

Do not use material for backfill until borrow source chemical and physical test results have been submitted and approved by the Government.

PART 3 EXECUTION

3.1 SURVEYS

Perform surveys immediately prior to and after excavation of contaminated material to determine the volume of contaminated material removed. Also, perform surveys immediately after backfill of each excavation. Provide cross-sections on 25 foot intervals and at break points for all excavated areas. Survey and show locations of confirmation samples on the drawings.

3.2 EXISTING STRUCTURES AND UTILITIES

Do not perform excavation until site utilities have been field located.

Take the necessary precautions to ensure no damage occurs to existing structures and utilities. Repair damage to existing structures and utilities resulting from the Contractor's operations at no additional cost to the Government. Do not disturb utilities encountered that were not previously shown or otherwise located without approval from the Contracting Officer.

3.3 CLEARING

Perform clearing to the limits shown on the drawings in accordance with Section 31 11 00 CLEARING AND GRUBBING.

3.4 CONTAMINATED MATERIAL REMOVAL

3.4.1 Excavation

Excavate areas of contamination to the depth and extent shown on the drawings and not more than 0.2 ft beyond the depth and extent shown on the drawings unless directed by the Contracting Officer. Perform excavation in a manner that will limit spills and the potential for contaminated material to be mixed with uncontaminated material. Maintain an excavation log describing visible signs of contamination encountered for each area of

SECTION 02 61 13 Page 4 excavation. Prepare excavation logs in accordance with ASTM D5434.

3.4.2 Shoring

If workers must enter the excavation, evaluate, shore, slope or brace it as required by EM 385-1-1 and 29 CFR 1926 section 650.

3.4.3 Dewatering

Divert surface water to prevent entry into the excavation. Do not perform dewatering without prior approval of the Contracting Officer.

3.5 CONTAMINATED MATERIAL STORAGE

Place material in temporary storage after treatment while awaiting test results. The following paragraphs describe acceptable methods of material storage. Provide storage units that are in good condition and constructed of materials that are compatible with the material or liquid to be stored. If multiple storage units are required, clearly label each unit with an identification number and keep a written log to track the source of contaminated material in each temporary storage unit.

3.5.1 Stockpiles

Construct stockpiles to isolate stored contaminated material from the environment. Stockpile size greater than 1,000 cubic yards is prohibited. Construct stockpiles to include:

a. A chemically resistant geomembrane liner free of holes and other damage. Provide non-reinforced geomembrane liners that have a minimum thickness of 20 mil. Provide scrim reinforced geomembrane liners that have a minimum weight of 40 lbs/1000 square feet. Place the geomembrane on a ground surface that is free of rocks greater than 0.5 inch in diameter and any other object which could damage the membrane..

b. Geomembrane cover free of holes or other damage to prevent precipitation from entering the stockpile. Provide non-reinforced geomembrane covers that have a minimum thickness of 10 mil. Provide scrim reinforced geomembrane covers that have a minimum weight of 26 lbs/1000 square feet. Extend the cover material over the berms and anchor or ballast to prevent it from being removed or damaged by wind.

c. Berms surrounding the stockpile, a minimum of 12 inch in height. Berm vehicle access points.

d. Slope the liner system to allow collection of leachate. Storage and removal of liquid which collects in the stockpile, in accordance with paragraph Liquid Storage.

3.5.2 Roll-Off Units

Use water-tight roll-off units used to temporarily store contaminated material. Place a cover over the units to prevent precipitation from contacting the stored material. Locate the units as indicated in the approved Work Plan. Remove liquid which collects inside the units and store in accordance with paragraph Liquid Storage.

SECTION 02 61 13 Page 5

3.5.3 Liquid Storage

Temporarily store liquid collected from excavations and stockpiles in 55 gallon barrels, or equivalent. Provide water-tight liquid storage containers and locate as indicated in the approved Work Plan.

3.6 SAMPLING

3.6.1 Sampling of Stored Material

Any excess excavated soil that is intended for reuse or disposal outside of P-614 project site must be characterized to meet the recipient's requirements. Samples must be analyzed per disposal or recieving facility's requirements, and the GEPA guidance.

Treat stored material with contaminant levels that exceed the TPESL, subject to approval by the Contracting Officer.

3.6.2 Sampling Liquid

Sample liquid collected from excavations and dewatering at a frequency of once for every 500 gal of liquid collected and analyzed to meet the requirements of the recieving installation or disposal facility. The cost for sample analysis and disposal offsite of liquid waste is the contractor's responsibility. Documentation of all analyses performed must be furnished to the Contracting Officer.

Treat liquid with contaminant levels that exceed action levels subject to approval by the Contracting Officer. Provide in the Work Plan treatment options, methodology, and supporting reference for liquid encountered with contaminant levels that exceed the TPESL.

3.6.3 Sampling Beneath Storage Units

Collect samples from beneath each storage unit prior to construction of and after removal of the storage unit. Collect samples at a frequency of one per each 2,000 square feet from a depth interval of 0 to 0.5 ft and analyze for the following:

* Total Petroleum Hydrocarbons by EPA Method 8015

* Polynuclear Aromatic Hydrocarbons by EPA Method 8270

* PCB by EPA Method 8082

* RCRA 8 metals by EPA Method 6010/7000

* Pesticides by EPA Method 8081

Based on test results, remove soil which has become contaminated above the TPESL at no additional cost to the Government. Handle contaminated material which is removed from beneath the storage unit in accordance with paragraph Sampling of Stored Material. As directed by the Contracting Officer and at no additional cost to the Government, perform additional sampling and analysis to verify areas of contamination found beneath stockpiles have been cleaned up to below TPESL.

3.7 SPILLS

In the event of a spill or release of a hazardous substance (as designated in 40 CFR 302 ), pollutant, contaminant, or oil (as governed by the Oil Pollution Act (OPA), 33 U.S.C. 2701 et seq.), notify the Contracting Officer immediately. If the spill exceeds the reporting threshold, follow

SECTION 02 61 13 Page 6 the pre-established procedures as described in the Base Wide Contingency Plan for immediate reporting and containment. Take immediate containment actions to minimize the effect of any spill or leak. Perform cleanup in accordance with applicable federal, state, and local regulations. As directed by the Contracting Officer, perform confirmation sampling and analysis to verify spills have been cleaned up. Perform spill cleanup and cleanup confirmation at no additional cost to the Government.

3.8 BACKFILLING

3.8.1 Confirmation Results

Backfill excavations after all contaminated materials have been removed and confirmation results have been approved. Place and compact backfill to the lines and grades shown on the drawings.

3.8.2 Compaction

All backfill operations must adhere to Section 31 23 00 00 EXCAVATION AND

FILL.

3.9 DISPOSAL REQUIREMENTS

Perform offsite disposal of contaminated material in accordance with Section 02 81 00 TRANSPORTATION AND DISPOSAL OF HAZARDOUS MATERIALS.

3.10 CLOSURE REPORT

Submit 2 copies of a Closure Report within 14 calendar days of completing earthwork at the site. Label the report with the contract number, project name, location, date, and the name of general Contractor. As a minimum, include the following information:

a. A cover letter signed by a responsible company official certifying that all services involved have been performed in accordance with the terms and conditions of the contract documents and regulatory requirements.

b. A narrative report including, but not limited to, the following:

(1) site conditions, ground water elevation, and cleanup criteria;

(2) excavation logs;

(3) field screening readings;

(4) quantity of materials removed from each area of contamination;

(5) quantity of water/product removed during dewatering;

(6) sampling locations and sampling methods;

(7) sample collection data such as time of collection and method of preservation, and field notes;

(8) Completed and signed sample chain-of-custody forms; and

(9) source of backfill.

SECTION 02 61 13 Page 7

c. Copies of all chemical and physical test results.

d. Copies of all manifests and land disposal restriction notifications.

e. Copies of all certifications of final disposal signed by the responsible disposal facility official.

f. Waste profile sheets.

g. Scale drawings showing limits of each excavation, limits of contamination, known underground utilities within 50 feet of excavation, sample locations, and sample identification numbers. Show on-site stockpile, storage, treatment, loading, and disposal areas on the drawings.

h. Progress Photographs. Use color photographs to document progress of the work. Take a minimum of four views of the site showing the location of the area of contamination, entrance/exit road, and any other notable site conditions before work begins. After work has been started, photographically record daily activities at each work location. Provide photographs that are a minimum of 3 by 5 inches and include:

(1) Soil removal and sampling.

(2) Dewatering operations.

(3) Unanticipated events such as spills and the discovery of additional contaminated material.

(4) Contaminated material/water storage, handling, treatment, and transport.

(5) Site or task-specific employee respiratory and personal protection.

(6) Fill placement and grading.

(7) Post-construction photographs. After completion of work at each site, take a minimum of four views of each excavation site.

Include a digital version of all photos shown in the report with the Closure Report. Attach an information box to each print. Arrange the typewritten box as follows:

Project Name: Direction of View:

Location: Date/Time:

Photograph No.: Description of View:

-- End of Section --

SECTION 02 61 13 Page 8

POWER Engineers, Inc. - Hazmat Survey and Soil Screening Report FY24 MCON Project P-614, Guam Joint Consolidated Communication Center

3167_1 39 MNA Environmental

Table 8. Summary of Soil Analytical Results: DA1, DA2, and DA4

DA: Location Sample ID/ Analytes Depth

Analytical Results (mg/kg) Tier 1 Environmental Screening Level (mg/kg)

DA1: Building 20011 DA2: Building 23002 DA4: New P-614 Area Unrestricted Restricted 20011-0-1’ 0-1 ft bgs

20011-1’-2’ 1-2 ft bgs

23002-0-1’ 0-1 ft bgs

23002-1’-2’ 1-2 ft bgs

P-614-0-1’ 0-1 ft bgs

P-614-1’-2’ 1-2 ft bgs

Shallow soil (<9.8 ft bgs)

Shallow soil (<3.2 ft bgs)

Total Petroleum Hydrocarbons (EPA 8015B/8015M) Gasoline Range Organics ND (3.8) ND (3.5) ND (3.7) ND (3.5) ND (3.6) ND (3.3) 100 500 Diesel Range Organics ND (13) ND (12) 59 17 55 34 220 500

Residual Range Organics ND (25) ND (23) 58 ND (24) 71 ND (43) 500 2,500 Volatile/Purgeable Organics (EPA 8260B)

See Appendix for full list of analytes and reporting limits ND ND ND ND ND ND Varies Varies

Polynuclear Aromatic Hydrocarbons (EPA 8270 SIM) 1-Methylnaphthalene ND (0.013) ND (0.093) ND (0.098)H ND (0.012) ND (0.096) ND (0.022) 0.89 0.89 2-Methylnaphthalene ND (0.013) ND (0.093) ND (0.098)H ND (0.012) ND (0.096) ND (0.022) 1.9 1.9

Naphthalene ND (0.013) ND (0.093) ND (0.098)H ND (0.012) ND (0.096) ND (0.022) 3.1 3.1 Acenaphthylene ND (0.013) ND (0.093) ND (0.098)H ND (0.012) ND (0.096) ND (0.022) 5.5 5.5 Acenaphthene ND (0.013) ND (0.093) ND (0.098)H ND (0.012) ND (0.096) ND (0.022) 40 40

Fluorene ND (0.013) ND (0.093) ND (0.098)H ND (0.012) ND (0.096) ND (0.022) 31 31 Phenanthrene ND (0.013) ND (0.093) 0.24H 0.086 ND (0.096) ND (0.022) 23 23 Anthracene ND (0.013) ND (0.093) ND (0.098)H 0.014 ND (0.096) ND (0.022) 1.4 1.4

Fluoranthene ND (0.013) ND (0.093) 0.86H 0.28 0.11 ND (0.022) 29 29 Pyrene ND (0.013) ND (0.093) 1H 0.33 0.14 ND (0.022) 41 41

Benzo(a)anthracene ND (0.013) ND (0.093) 0.51H 0.18 ND (0.096) ND (0.022) 3.3 3.3 Chrysene ND (0.013) ND (0.093) 0.78H 0.26 0.13 ND (0.022) 30 30

Benzo(b)fluoranthene 0.013 ND (0.093) 0.97H 0.32 0.17 ND (0.022) 11 68 Benzo(k)fluoranthene ND (0.013) ND (0.093) 0.36H 0.12 ND (0.096) ND (0.022) 39 39

Benzo(a)pyrene ND (0.013) ND (0.093) 0.78H 0.25 0.13 ND (0.022) 3.6 5.9 Indeno(1,2,3-cd)pyrene ND (0.013) ND (0.093) 0.58H 0.18 0.098 ND (0.022) 11 31 Dibenz(a,h)anthracene ND (0.013) ND (0.093) 0.14H 0.044 ND (0.096) ND (0.022) 1.1 21 Benzo(g,h,i)perylene ND (0.013) ND (0.093) 0.58H 0.18 0.10 ND (0.022) 35 35

Organochlorine Pesticides (EPA 8081B) alpha-BHC ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) 0.0291 0.0291 beta-BHC ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054)

Amendment No. 0009 02 61 13 EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL, dated April 18, 2025 myounghee Highlight P-614-0-1’ 0-1 ft bgs P-614-1’-2’ 1-2 ft bgs myounghee Highlight A4:

myounghee Highlight D myounghee Highlight New P-614 Area

3167_1 40 MNA Environmental

Analytes Depth

Analytical Results (mg/kg) Tier 1 Environmental Screening Level (mg/kg)

DA1: Building 20011 DA2: Building 23002 DA4: New P-614 Area Unrestricted Restricted 20011-0-1’ 0-1 ft bgs

20011-1’-2’ 1-2 ft bgs

23002-0-1’ 0-1 ft bgs

23002-1’-2’ 1-2 ft bgs

P-614-0-1’ 0-1 ft bgs

P-614-1’-2’ 1-2 ft bgs

Shallow soil (<9.8 ft bgs)

Shallow soil (<3.2 ft bgs) gamma-BHC ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) delta-BHC ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) Heptachlor ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) 1.4 6.3

Aldrin ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) 2.8 2.8 Heptachlor epoxide ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) 0.2 3

Endosulfan I ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054)

4.42 4.42 Endosulfan II ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054)

Endosulfan sulfate ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) Dieldrin 0.029# 0.0073#C 0.01 ND (0.0059) ND (0.03) ND (0.0054) 2.5 7.9

4,4'-DDD ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) 2.3 9.6

4,4'-DDE 0.028#C 0.0063#C ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) 2 9.3

4,4'-DDT 0.040 ND (0.0058) 0.019C 0.0093 ND (0.03) ND (0.0054) 1.9 1.9

Endrin ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054)

3.83 103 Endrin aldehyde ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054)

Endrin ketone ND (0.006) ND (0.0058) ND (0.0061) ND (0.0059) ND (0.03) ND (0.0054) Chlordane (technical) 0.063 ND (0.058) ND (0.061) ND (0.059) ND (0.3) ND (0.054) 7.6 7.6

Methoxychlor ND (0.013) ND (0.012) ND (0.012) ND (0.012) ND (0.03) ND (0.011) 5.4 5.4 Toxaphene ND (0.13) ND (0.12) ND (0.12) ND (0.12) ND (0.6) ND (0.11) 0.49 2.1

Polychlorinated Biphenyls (EPA 8082B) Aroclor-1016 ND (0.063) ND (0.058) ND (0.061) ND (0.059) ND (0.12) ND (0.054)

1.2 (ESL for Total

PCB)

9.7 (ESL for Total

PCB)

Aroclor-1221 ND (0.063) ND (0.058) ND (0.061) ND (0.059) ND (0.12) ND (0.054) Aroclor-1232 ND (0.063) ND (0.058) ND (0.061) ND (0.059) ND (0.12) ND (0.054) Aroclor-1242 ND (0.063) ND (0.058) ND (0.061) ND (0.059) ND (0.12) ND (0.054) Aroclor-1248 ND (0.063) ND (0.058) ND (0.061) ND (0.059) ND (0.12) ND (0.054) Aroclor-1254 ND (0.063) ND (0.058) ND (0.061) ND (0.059) ND (0.12) ND (0.054) Aroclor-1260 ND (0.063) 0.097 0.095 ND (0.059) ND (0.12) ND (0.054) Aroclor-1262 ND (0.063) ND (0.058) ND (0.061) ND (0.059) ND (0.12) ND (0.054)

Aroclor-1268 ND (0.063) ND (0.058) ND (0.061) ND (0.059) ND (0.12) ND (0.054)

Amendment No. 0009 02 61 13 EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL, dated April 18, 2025 myounghee Highlight A4: New P-614 Area myounghee Highlight P-614-0-1’ 0-1 ft bgs P-614-1’-2’ 1-2 ft bgs

3167_1 41 MNA Environmental

Analytes Depth

Analytical Results (mg/kg) Tier 1 Environmental Screening Level (mg/kg)

DA1: Building 20011 DA2: Building 23002 DA4: New P-614 Area Unrestricted Restricted 20011-0-1’ 0-1 ft bgs

20011-1’-2’ 1-2 ft bgs

23002-0-1’ 0-1 ft bgs

23002-1’-2’ 1-2 ft bgs

P-614-0-1’ 0-1 ft bgs

P-614-1’-2’ 1-2 ft bgs

Shallow soil (<9.8 ft bgs)

Shallow soil (<3.2 ft bgs)

RCRA 8 Metals (EPA 6010B/7471A) Arsenic 6 5.7 6.8 3.3 18 4.0 24 95 Barium 11 12 16 11 35 8.1 1,000 2,500

Cadmium ND (0.53) ND (0.57) 1.3 0.96 2.8 0.75 14 74 Chromium 77 82 130 83 480 110 1,100 1,100

Lead 14 39 73 48 94 20 200 800 Mercury ND (0.2) ND (0.17) ND (0.2) ND (0.20) ND (0.19) ND (0.18) 4.7 70 Selenium ND (3.2) ND (3.4) ND (3.3) ND (3.2) ND (3.5) ND (3.2) 78 1,200

Silver ND (0.53) ND (0.57) ND (0.54) ND (0.53) ND (0.58) ND (0.53) 78 1,200 Criteria: Tropical Pacific Soil Tier 1 Environmental Screening Level above a non-drinking water resource with unrestricted (residential) and restricted (commercial) land uses. Shallow soil is assumed to be within 9.8 feet of surface for residential sites and 3.2 feet of surface soil for commercial/industrial sites (Hawaii Department of Health, Fall 2017).

Notes:

1 ESL is for Hexachlorocyclohexane ("BHC" as Lindane) = Alpha- + Beta- + Gamma- + Delta-BHC 2 ESL is for Endosulfan = Endosulfan I + Endosulfan II + Endosulfan sulfate 3 ESL is for Endrin = Endrin + Endrin aldehyde + Endrin ketone Laboratory Notes:

H Hold time was exceeded # Continuing Calibration Verification (CCV) drift outside limits, average CCV drift within limits per method requirements C Presence confirmed, but Relative Percent Difference (RPD) between columns exceeds 40% Acronyms and Abbreviations:

EPA Environmental Protection Agency ID identification ND (00) Not Detected (Reporting Limit) ft bgs feet below ground surface mg/kg milligrams per kilogram myounghee Highlight DA4: New P-614 Area myounghee Highlight P-614-0-1’ 0-1 ft bgs P-614-1’-2’ 1-2 ft bgs

Sheet Number

C - 34

Soil Sampling Locations FY24 MCON Project P-614

Decision Area 4 P-614 Project Area

MNA Environmental

Scale (ft.)

0 50 100

Legend and Notes

Boring Locations

Composite samples were collected from 0 - 1.0 and

1.0 - 2.0 feet below ground surface (ft bgs).

APPENDIX - HAZMAT SOIL REPORT