Appendix B Excavation and Handling of Contaminated Material.pdf

SECTION TABLE OF CONTENTS

DIVISION 02 - EXISTING CONDITIONS

SECTION 02 61 13

EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL

02/10

PART 1 GENERAL

1.1 REFERENCES

1.2 DESCRIPTION OF WORK

1.2.1 Scheduling

1.2.2 Work Plan

1.2.3 Other Submittal Requirements

1.3 SUBMITTALS

1.4 REGULATORY REQUIREMENTS

1.4.1 Permits and Licenses

1.4.2 Air Emissions

PART 2 PRODUCTS

2.1 SPILL RESPONSE MATERIALS

2.2 BACKFILL

PART 3 EXECUTION

3.1 SURVEYS

3.2 EXISTING STRUCTURES AND UTILITIES

3.3 CLEARING

3.4 CONTAMINATED MATERIAL REMOVAL

3.4.1 Excavation

3.4.2 Shoring

3.4.3 Dewatering

3.5 CONFIRMATION SAMPLING AND ANALYSIS

3.6 CONTAMINATED MATERIAL STORAGE

3.6.1 Roll-Off Units

3.6.2 Liquid Storage

3.7 SAMPLING

3.7.1 Sampling of Stored Material

3.7.2 Sampling Liquid

3.7.3 Sampling Beneath Storage Units

3.8 SPILLS

3.9 BACKFILLING

3.9.1 Confirmation Test Results

3.9.2 Compaction

3.10 DISPOSAL REQUIREMENTS

3.11 CLOSURE REPORT

-- End of Section Table of Contents --

SECTION 02 61 13 Page 1

FOR OFFICIAL USE ONLY (FOUO)

SECTION 02 61 13

EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL

02/10

PART 1 GENERAL

1.1 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 D1556/D1556M (2015; E 2016) Standard Test Method for Density and Unit Weight of Soil in Place by Sand-Cone Method

ASTM D1557 (2012; E 2015) Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3) (2700 kN-m/m3)

ASTM D2167 (2015) Density and Unit Weight of Soil in Place by the Rubber Balloon Method

ASTM D2487 (2017) Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)

ASTM D422 (1963; R 2007; E 2014; E 2014)

Particle-Size Analysis of Soils

ASTM D4318 (2017; E 2018) Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils

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

ASTM D698 (2012; E 2014; E 2015) Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/cu. ft.

(600 kN-m/cu. m.))

U.S. ENVIRONMENTAL PROTECTION AGENCY (EPA)

EPA SW-846.3-3 (1999, Third Edition, Update III-A) Test Methods for Evaluating Solid Waste:

Physical/Chemical Methods

KOREAN INDUSTRIAL STANDARDS (KS)

KS F 2302 (2017) Test Method for Particle Size Distribution of Soils

KS F 2303 (2015) Test Method for Liquid Limit and Plastic Limit of Soils

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KS F 2311 (2016) Test Method for Soil Density by the Sand Replacement Method

KS F 2312 (2016) Test Method for Soil Compaction Using a Rammer

KS F 2324 (2016) Method of Classification of Soils for Engineering Purposes

KS F 2347 (2018) Testing Method for Density of Soil in Place by the Rubber-Balloon Method

U.S. FORCES KOREA (USFK)

USFK Regulation 201-1 (2012) Environmental Governing Standards

(EGS)

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2014) Safety and Health Requirements Manual

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

1.2 DESCRIPTION OF WORK

The work shall consist of excavation and temporary storage of contaminated material. Approximate locations of contaminated material are shown in the Preliminary Report of Environmental Findings (PREF) for CY20 ROKFC In-Kind, F20R600 Communications HQ Building, Osan Airbase, Korea (G&EE 17-01 G/Report G2019-009). Chemical analysis of contaminated material has been performed by the Government. Subsurface conditions are shown in the Preliminary Report of Environmental Findings (PREF) for CY20 ROKFC In-Kind, F20R600 Communications HQ Building, Osan Airbase, Korea (G&EE 17-01 G/Report G2019-009). The Contractor shall submit a Work Plan as specified in the Submittals paragraph. The Contracting Officer shall be notified within 48 hours, 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 not available on-site. The disposal location for contaminated soils is approximately 2.5 kilometers from the project site.

1.2.1 Scheduling

Notify the Contracting Officer 7 calendar days prior to the start of excavation of contaminated material. The Contractor shall be responsible for contacting regulatory agencies in accordance with the applicable reporting requirements.

1.2.2 Work Plan

Submit a Work Plan within 30 calendar days after notice to proceed. No work at the site, with the exception of site inspections and surveys, shall be performed 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

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Communications Headquarters Building CY19 ROKFC In-Kind F20R600 Osan AB, Korea 100% Contract Document Submission - July 11, 2019 due to deficiencies in the plan. At a minimum, the Work Plan shall include:

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.

h. Spill contingency plan.

1.2.3 Other Submittal Requirements

Submit separate cross-sections of each area before and after excavation and after backfilling, test results, and 5 copies of the Closure Report within 14 calendar days of work completion at the site.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Surveys

SD-03 Product Data

Work Plan; G Closure Report; G

SD-06 Test Reports

Backfill Surveys Confirmation Sampling and Analysis Sampling of Stored Material; G Sampling Liquid; G Compaction

1.4 REGULATORY REQUIREMENTS

1.4.1 Permits and Licenses

Obtain required USFK Regulation 201-1 for excavation and storage of contaminated material. Permits shall be obtained at no additional cost to the Government.

1.4.2 Air Emissions

Air emissions shall be monitored and controlled in accordance with Section 01 57 19.00 31 TEMPORARY ENVIRONMENTAL CONTROLS (OSAN ONLY).

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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. Spill response materials shall be available at all times when contaminated materials/wastes are being handled or transported. Spill response materials shall be compatible with the type of materials and contaminants being handled.

2.2 BACKFILL

Backfill material shall be obtained from offsite sources approved by the Contracting Officer. Backfill shall be classified in accordance with ASTM D2487or KS F 2324 as GW, GP, GM, GC, SW, SP, SM, SC, ML, MH, CL, or CH and shall be free from roots and other organic matter, trash, debris, snow, ice or frozen materials. Backfill material shall be tested for the parameters listed below at a frequency of once per 3000 cubic m. A minimum of one set of classification tests shall be performed per borrow source. One backfill sample per borrow source shall also be collected and tested for the chemical parameters listed below.

Physical Parameter Test Method

Grain Size ASTM D422 or KS F 2302

Compaction ASTM D698 or KS F 2312

Atterberg Limit ASTM D4318 or KS F 2303

Chemical Parameter Criteria

TPH for Diesel Fuel Oil #2 1,000 PPM

BTEX for Gasoline 100 PPM

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

Offsite soils brought in for use as backfill shall be tested for Total Petroleum Hydrocarbons (TPH) and Benzene, Toluene, Ethyl Benzene, and Xylene (BTEX). Backfill shall contain less than 100 parts per million (ppm) TPH, less than 1 ppm Benzene, less than 20 ppm Toluene, less than 50 ppm Ethyl Benzene, and less than 15 ppm Xylene. Determine TPH concentrations by using EPA SW-846.3-3 Method 8015. Determine BTEX concentrations by using EPA SW-846.3-3 Method 8021 or 8260.

Provide borrow site testing for TPH and BTEX from composite samples of soil collected from the borrow site, with the composite samples being representative of the soil to be acquired for the project. Surface samples shall be obtained by excavating a minimum of 20 centimeters from the surface. For borrow sites 8,100 square meters or less, 1 composite sample shall be collected from the site for analysis. For borrow sites larger than 8,100 square meters, 1 sample for each additional 8,100 square meter increment shall be collected. For borrow excavations deeper

SECTION 02 61 13 Page 5 than 2 meters, the above sampling protocol shall be repeated again with every 2 meter increase in depth.

For each prospective borrow site, the contractor shall submit to the Contracting Officer a Borrow Site Environmental Assessment Report which documents that borrow soil from the site is not contaminated. The Borrow Site Environmental Assessment Report shall include the following: general site description and environmental condition;

location information and map; historic and current land use;

photographs; any known contaminant spills in the area; any on-site or adjacent facilities which pose risks of contaminating the borrow fill;

procedures for soil sample collection and collection locations; and the laboratory testing procedures and resulting analytical data. The report shall have a cover sheet that is signed by the contractor, which attests and certifies the suitability of the fill material. Soil from a particular borrow site shall not be brought onsite until this report has been approved by the Contracting Officer.

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 7.6 meter intervals and at break points for all excavated areas. Locations of confirmation samples shall also be surveyed and shown on the drawings.

3.2 EXISTING STRUCTURES AND UTILITIES

No excavation shall be performed until site utilities have been field located. Take the necessary precautions to ensure no damage occurs to existing structures and utilities. Damage to existing structures and utilities resulting from the Contractor's operations shall be repaired at no additional cost to the Government. Utilities encountered that were not previously shown or otherwise located shall not be disturbed without approval from the Contracting Officer.

3.3 CLEARING

Clearing shall be performed 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

Areas of contamination shall be excavated to the depth and extent shown on the drawings and not more than 60 mm beyond the depth and extent shown on the drawings unless directed by the Contracting Officer.

Excavation shall be performed in a manner that will limit spills and the potential for contaminated material to be mixed with uncontaminated material. An excavation log describing visible signs of contamination encountered shall be maintained for each area of excavation. Excavation logs shall be prepared in accordance with ASTM D5434.

3.4.2 Shoring

If workers must enter the excavation, it shall be evaluated, shored, sloped or braced as required by EM 385-1-1 and 29 CFR 1926 section 650.

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3.4.3 Dewatering

Surface water shall be diverted to prevent entry into the excavation.

Dewatering shall be limited to that necessary to assure adequate access, a safe excavation, prevent the spread of contamination, and to ensure that compaction requirements can be met.

3.5 CONFIRMATION SAMPLING AND ANALYSIS

The Contracting Officer shall be present to inspect the removal of contaminated material from each site. After all material suspected of being contaminated has been removed, the excavation shall be examined for evidence of contamination. If the excavation appears to be free of contamination, field analysis shall be used to determine the presence of volatile and/or semi-volatile contamination using a real time vapor monitoring instrument or Photo Ionization Detector (PID). Excavation of additional material shall be as directed by the Contracting Officer.

After all suspected contaminated material is removed, confirmation samples shall be collected and analyzed for the following contaminants:

(Please call ED-G for specific number for this project)

Chemical Parameter Action Level

TPH 1.0 PPM

BTEX 1.0 PPM

Samples shall be collected at a frequency of one per 500 square m from the bottom and each of the side walls or as directed by the Contracting Officer. A minimum of one sample shall be collected from the bottom and each side wall of the excavation. Based on test results, propose any additional excavation which may be required to remove material which is contaminated above action levels. Additional excavation shall be subject to approval by the Contracting Officer. Locations of samples shall be marked in the field and documented on the as-built drawings.

3.6 CONTAMINATED MATERIAL STORAGE

Material shall be placed in temporary storage immediately after excavation. The following paragraphs describe acceptable methods of material storage. Storage units shall be in good condition and constructed of materials that are compatible with the material or liquid to be stored. If multiple storage units are required, each unit shall be clearly labeled with an identification number and a written log shall be kept to track the source of contaminated material in each temporary storage unit.

3.6.1 Roll-Off Units

Roll-off units used to temporarily store contaminated material shall be water tight. A cover shall be placed over the units to prevent precipitation from contacting the stored material. The units shall be located as directed by the Contracting Officer. Liquid which collects inside the units shall be removed and stored in accordance with paragraph Liquid Storage.

3.6.2 Liquid Storage

Liquid collected from excavations and temporary storage shall be temporarily stored in 220 L barrels. Liquid storage containers shall be water-tight and shall be located as directed by the Contracting Officer.

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3.7 SAMPLING

3.7.1 Sampling of Stored Material

Samples of stored material shall be collected at a frequency of once per 500 cubic m. Samples shall be tested for the following: (Please call ED-G for specific number for this project)

Chemical Parameter Action Level

TPH 1.0 PPM

BTEX 1.0 PPM

Stored material with contaminant levels that exceed the action levels shall be treated offsite. Analyses for contaminated material to be taken to an offsite treatment facility shall conform to USFK Regulation 201-1 and Installation Policy as well as to the requirements of the treatment facility. Documentation of all analyses performed shall be furnished to the Contracting Officer. Additional sampling and analyses to the extent required by the approved offsite treatment, storage or disposal (TSD) facility shall be the responsibility of the Contractor and shall be performed at no additional cost to the Government.

3.7.2 Sampling Liquid

Liquid collected from excavations, storage areas, and decontamination facilities shall be sampled at a frequency of once for every 2,000 L of liquid collected. Samples shall be tested for the following: (Please call ED-G for specific number for this project)

Chemical Parameter Action Level

TPH 1.0 PPM

BTEX 1.0 PPM

Liquid with contaminant levels that exceed action levels shall be treated offsite. Analyses for contaminated liquid to be taken to an offsite treatment facility shall conform to USFK Regulation 201-1 and Installation Policy as well as to the requirements of the treatment facility. Documentation of all analyses performed shall be furnished to the Contracting Officer. Additional sampling and analysis to the extent required by the approved offsite treatment, storage or disposal (TSD) facility receiving the material shall be the responsibility of the Contractor and shall be performed at no additional cost to the Governmen.

3.7.3 Sampling Beneath Storage Units

Samples from beneath each storage unit shall be collected prior to construction of and after removal of the storage unit. Samples shall be collected at a frequency of one per each 300 square m from a depth interval of 0 to 0.15 m and shall be tested for the following: (Please call ED-G for specific number for this project)

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Chemical Parameter Action Level

TPH 1.0 PPM

BTEX 1.0 PPM

Based on test results, soil which has become contaminated above action levels shall be removed at no additional cost to the Government.

Contaminated material which is removed from beneath the storage unit shall be handled in accordance with paragraph Sampling of Stored Material. As directed by the Contracting Officer and at no additional cost to the Government, additional sampling and testing shall be performed to verify areas of contamination found beneath stockpiles have been cleaned up to below action levels.

3.8 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 the pre-established procedures as described in the Base Wide Contingency Plan for immediate reporting and containment.

Immediate containment actions shall be taken to minimize the effect of any spill or leak. Cleanup shall be in accordance with applicable USFK Regulation 201-1 and Installation Policy. As directed by the Contracting Officer, additional sampling and testing shall be performed to verify spills have been cleaned up. Spill cleanup and testing shall be done at no additional cost to the Government.

3.9 BACKFILLING

3.9.1 Confirmation Test Results

Excavations shall be backfilled immediately after all contaminated materials have been removed and confirmation test results have been approved. Backfill shall be placed and compacted to the lines and grades shown on the drawings.

3.9.2 Compaction

Place approved backfill in lifts with a maximum loose thickness of 200 mm.

Compact soil to 90 percent of ASTM D698, ASTM D1557, or KS F 2312 maximum dry density. Perform density tests at a frequency of once per 930 square meters per lift. conduct a minimum of one density test on each lift of backfill placed. Determine field in-place dry density in accordance with ASTM D1556/D1556M, ASTM D2167, KS F 2311 , or KS F 2347

3.10 DISPOSAL REQUIREMENTS

Offsite disposal of contaminated material shall be in accordance with all applicable ROK laws Act No. 15103, PD No. 28898 and MD No. 759. The Korean Soil Environment Conservation Act (2 June 2013) established threshold levels for POL impacted soils. Soil concentrations exceeding the limits below require treatment at the Osan AB land farm prior to transfer to authorized disposal sites.

Total Petroleum Hydrocarbons (TPH) - 800 milligrams per kilogram (mg/kg)

Benzene - 1 milligram per kilogram (mg/kg)

Toluene - 20 milligrams per kilogram (mg/kg)

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Ethylbenzene - 50 milligrams per kilogram (mg/kg)

Xylene - 15 milligrams per kilogram (mg/kg)

All soil excavated for the Communication Buildings project having any measurable level of the chemicals listed above shall not be used for fill material under or adjacent to the proposed Communication Building.

All contaminated soil must be transported to the land farm on base and coordinated with the Land Farm Program Manager, Mr. Kwon. The soil Acceptance Criteria are:

a. Cannot be contaminated with contaminants other than POL associated chemicals.

b. Must be free from debris. Concrete and other debris larger than a softball (4 inch diameter) must be removed from the soil.

c. All soil brought in to the land farm shall be graded across the surface of the treatment bed to prevent any vertical violations of the second runway primary surface. Stockpiles must be less than 4 feet high.

3.11 CLOSURE REPORT

Submit five copies of a Closure Report within 14 calendar days of completing work at the site. The report shall be labeled with the contract number, project name, location, date, name of general Contractor, and the Corps of Engineers District contracting for the work. The Closure Report shall include the following information as a minimum:

a. A cover letter signed by a responsible company official or registered Professional Engineer 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;

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

(9) source of backfill.

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.

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f. Waste profile sheets.

g. Scale drawings showing limits of each excavation, limits of contamination, known underground utilities within 15 m of excavation, sample locations, and sample identification numbers.

On-site stockpile, storage, treatment, loading, and disposal areas shall also be shown on the drawings.

h. Progress Photographs. Color photographs shall be used to document progress of the work. 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 shall be taken before work begins. After work has been started, activities at each work location shall be photographically recorded daily. Photographs shall be a minimum of 76.2 by 127.0 mm and shall 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.

A digital version of all photos shown in the report shall be included with the Closure Report. Photographs shall be a minimum of 76 by 127 mm and shall be mounted back-to-back in double face plastic sleeves punched to fit standard three ring binders. Each print shall have an information box attached. The box shall be typewritten and arranged as follows:

Project Name: Direction of View:

Location: Date/Time:

Photograph No.: Description of View:

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