02 61 13 AM0003.pdf

Replace Left Abutment Collector Pipe System, Big Bend Dam, SD BB90

SECTION TABLE OF CONTENTS

DIVISION 02 - EXISTING CONDITIONS

SECTION 02 61 13

EXCAVATION AND HANDLING OF CONTAMINATED MATERIALS

PART 1 GENERAL

1.1 REFERENCES

1.2 DESCRIPTION OF WORK

1.2.1 Contaminated Media Work Plan

1.3 SUBMITTALS

1.4 REGULATORY REQUIREMENTS

1.4.1 Permits and Licenses

PART 2 PRODUCTS

2.1 SPILL RESPONSE MATERIALS

PART 3 EXECUTION

3.1 EXISTING STRUCTURES AND UTILITIES

3.2 CONTAMINATED MATERIAL REMOVAL

3.2.1 Excavation

3.2.2 Care of Water

3.2.3 Dewatering

3.3 CONTAMINATED MATERIAL STORAGE

3.3.1 Stockpiles

3.3.2 Roll-Off Units

3.3.3 Liquid Storage

3.4 SAMPLING

3.4.1 Sampling of Stored Material

3.4.2 Sampling Liquid

3.5 SPILLS

3.6 DISPOSAL REQUIREMENTS

3.7 CLOSURE REPORT

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SECTION 02 61 13 Page 1

SECTION 02 61 13

EXCAVATION AND HANDLING OF CONTAMINATED MATERIALS

PART 1 GENERAL

Attachment: Big Bend Dam, Fort Thompson, South Dakota, Soil, Groundwater and Investigative Derived Waste Sampling, July 2021 included in the Geotechnical Data Report ( USACE 2022 GDR, under separate cover).

In the 1970s and 1980s, kerosene and/or diesel was often added to piezometers at Big Bend Dam that had water near the surface to prevent the water from freezing to permit wintertime readings. This procedure was phased out in the late 1980s. The amount of kerosene/diesel added was typically less than a gallon every year or two.

During recent routine maintenance operations, fuel was still present in two piezometers (J320-Ra and J320-Rb). Project staff have removed as much fuel as possible.

Geotechnical investigation was conducted for this project, borings drilled for soil and groundwater samples were collected and analyzed for total petroleum hydrocarbons (TPH)-diesel range organics (DRO). No free product was observed during this investigation. TPH-DRO was detected in soil and groundwater of Boring BH20-12 and in the soil of boring BH20-11. The soil sample taken for boring BH20-12 (BBSD-12A) was analyzed at 2,830 milligrams/kilogram (mg/kg) and the groundwater grab sample BBSD-12B was analyzed at 27,000 micrograms/Liter (ug/L). The soil sample taken at boring BH20-11 (BBSD-11A) was analyzed at 96.9 mg/kg.

The boring locations with contamination are near existing relief wells RW-66, RW-66A and RW-67, all of which require abandonment, replacement wells, and new relief well casing outfalls to connect to the collector pipe system. There is potential to encounter soils with TPH concentrations greater than 10 mg/kg during the excavation to complete the replacement relief well (RW-66R, RW-66AR, and RW-67R) casings and outfalls. See section 02 32 13 SUBSURFACE DRILLING AND SAMPLING for additional boring and sampling requirements to further delineate the extent of contamination.

Excavated soils with TPH concentrations greater than 10 mg/kg must be disposed of in accordance with South Dakota Department of Agriculture and Natural Resources (SDDANR) Waste Management Program requirements. If soil from the area of contamination is excavated during construction, stockpile it and test for TPH-DRO, BTEX, and naphthalene and dispose in accordance with applicable state requirements and requirements of the selected landfill. In additional, containerize any pumped/collected groundwater from contaminated areas and sample/analyze it for proper treatment and/or disposal. *AM0003 Groundwater that will be treated and discharged must meet the Groundwater Quality Standards in chapter 74:54:01. ** AM0003**

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.

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

40 CFR 302 Designation, Reportable Quantities, and Notification

USACE 2022 GDR (2022) Geotechnical Data Report, Missouri River, Fort Thompson, South Dakota

South Dakota Department of Agriculture and Natural Resources

(SDDANR)

2022 SDDANR (2022) South Dakota Petroleum Assessment and Cleanup Handbook * AM0003 also known as The Handbook for Investigation and Corrective Action Requirements for Discharges from storage Tanks, Piping Systems and other Releases **AM0003

* AM0003

1.2 DESCRIPTION OF WORK

Some soils to be excavated as part of this project and associated pumped/collected groundwater may be contaminated with TPH-DRO. See summary in Section 1 GENERAL and attached Soil, Groundwater and Investigative Derived Waste Sampling Report in the USACE 2022 GDR (submitted under separate cover) for additional information. Segregate potentially contaminated soil and test to determine proper disposition. Excavated soils with TPH concentrations greater than 10 mg/kg must be disposed of in accordance with SDDANR Waste Management Program requirements and requirements of the selected landfill. Additionally, pumped/collected groundwater from areas with evidence of contamination must be containerized and sampled/analyzed for proper disposal. * AM0003 - If the Contractor plans to treat the groundwater onsite and discharge it, it must meet the Groundwater Quality Standards in Chapter 74:54:01 .**AM0003 Follow the requirements of the 2022 SDDANR Petroleum Assessment and Cleanup Handbook. *AM0003 (The Handbook for Investigation and Corrective Action Requirements for Discharges from Storage Tanks, Piping Systems and other Releases) regarding disposal of water from dewatering activities. If discharge of water is planned, follow the requirements in the SDDANR Petroleum Assessment and Cleanup Handbook to obtain a discharge permit, and obtain approval of the project COR through approval of the Contaminated Media Work Plan. **AM0003

Ensure that workers who may be exposed to contamination are protected in accordance with EM 385-1-1 and applicable OSHA regulations. Protocols for protecting potentially exposed workers including recommended exposure monitoring, personal protective equipment, and personnel decontamination must be identified in the project Accident Prevention Plan (APP)as required in specification SECTION 01 35 26, GOVERNMENTAL SAFETY

REQUIREMENTS.

1.2.1 Contaminated Media Work Plan

Following subsurface drilling and sampling for contaminated materials, submit a Contaminated Media Work Plan within 30 calendar days after notice to proceed, and allow 30 calendar days in the schedule for the Government's review. No work in potentially contaminated areas (relief

SECTION 02 61 13 Page 3 well collector stations 6+00 to 9+52 including installation and abandonment of outfalls for relief wells 66A, 66AR, 66, 66R, 67, and 67R), with the exception of site inspections and the project survey, will be permitted until the Drilling Program Plan (see 02 32 13 SUBSURFACE DRILLING AND SAMPLING), Contaminated Media Work Plan, and the Geotechnical Investigation Report (see 02 32 13 SUBSURFACE DRILLING AND SAMPLING) have been reviewed and approved by the Government. The Contaminated Media Work Plan must include all planning for tasks involving removal, storage of any excavated contaminated soil and/or groundwater, sampling and analysis, transportation, and disposal of any contaminated soil and pumped/collected groundwater. Include any proposed plans for on-site treatment of contaminated groundwater and subsequent discharge. At a minimum, the Contaminated Media Work Plan must include:

a. Schedule of activities.

b. Method of excavation and equipment to be used.

c. Dewatering system design/operations to address contaminated groundwater.

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

e. Decontamination procedures.

f. Spill Contingency Plan

g. Identification of selected laboratory and analytical methods to be used.

h. Any proposals for on-site treatment of contaminated groundwater and subsequent discharge, including discussions of required discharge permits.

i. Waste characterization procedures.

j. Outline of Closure report.

k. Qualification of Environmental testing firm and personnel. At a minimum the firm and personnel must have five years experience performing sampling and testing of petroleum products.

l. Anticipated locations of contaminants based on findings of drilling and sampling.

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-01 Preconstruction Submittals

Contaminated Media Work Plan; G , DO

SD-06 Test Reports

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Sampling and Analysis

Sampling of Stored Material; G , AO

Sampling Liquid; G , AO

SD-11 Closeout Submittals

Closure Report; G , AO

* AM0003 Discharge Permit (if applicable) **AM0003

1.4 REGULATORY REQUIREMENTS

1.4.1 Permits and Licenses

Obtain required federal, state, and local permits for excavation and storage of contaminated material. Permits must be obtained at no additional cost to the Government.

PART 2 PRODUCTS

2.1 SPILL RESPONSE MATERIALS

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

PART 3 EXECUTION

3.1 EXISTING STRUCTURES AND UTILITIES

No excavation will be permitted until all utilities in the work area 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 must be repaired at no additional cost to the Government.

3.2 CONTAMINATED MATERIAL REMOVAL

3.2.1 Excavation

Project work and soil removal must 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 must be maintained for each area of soil removal. Excavation is required only as necessary to fulfill project needs and the Contractor will not be compensated for overexcavation resulting in additional/excess contaminated soil.

3.2.2 Care of Water

Surface water must be diverted to prevent entry into the excavation and/or the spread of contamination see 01 12 00 CONSTRUCTION GENERAL paragraph 1.6.

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3.2.3 Dewatering

The dewatering system shall be capable of isolating discharges in contaminated areas for proper disposal per 33 26 00 DEWATERING.

3.3 CONTAMINATED MATERIAL STORAGE

Material must be placed in temporary storage immediately after excavation at a location approved by the Contracting Officer. The following paragraphs describe acceptable methods of material storage. Storage units must 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 must be clearly labeled with an identification number and a written log must be kept to track the source of contaminated material in each temporary storage unit.

3.3.1 Stockpiles

Stockpiles must be constructed to isolate stored contaminated material from the environment. Stockpiles must be constructed to include:

a. A chemically resistant geomembrane liner free of holes and other damage. Non-reinforced geomembrane liners must have a minimum thickness of 20 mils. Scrim reinforced geomembrane liners must have a minimum weight of 40 lbs/1000 square feet. The ground surface on which the geomembrane is to be placed must be free of rocks greater than 0.5 inches 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. Non-reinforced geomembrane covers must have a minimum thickness of 10 mils. Scrim reinforced geomembrane covers must have a minimum weight of 26 lbs/1000 square feet. The cover material must be extended over the berms and anchored or ballasted to prevent it from being removed or damaged by wind.

c. Berms surrounding the stockpile, a minimum of 12 inches in height.

Vehicle access points must also be bermed.

d. The liner system must be sloped to allow collection of leachate.

Storage and removal of liquid which collects in the stockpile must be in accordance with paragraph 3.3.3 Liquid Storage.

3.3.2 Roll-Off Units

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

3.3.3 Liquid Storage.

3.3.3 Liquid Storage

Liquid collected from excavations and stockpiles must be temporarily stored in approved barrels or tanks. Liquid storage containers must be water-tight and must be located as approved by the Contracting Officer.

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3.4 SAMPLING

3.4.1 Sampling of Stored Material

The Contractor must identify proposed analytical parameters and frequency of sampling in the Contaminated Media Work Plan for approval. Analytical methods must conform to South Dakota Department of Agriculture and Natural Resources requirements.

Stored material with contaminant levels that exceed the action levels must be treated or disposed offsite as indicated in the approved Contaminated Media Work Plan.

3.4.2 Sampling Liquid

During dewatering system operation, the Contractor must identify proposed analytical parameters and frequency of sampling in the Contaminated Media Work Plan for approval.

3.5 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. Immediate containment actions must be taken to minimize the effect of any spill or leak. Cleanup must be in accordance with applicable federal, state, and local regulations. As directed by the Contracting Officer, additional sampling and testing must be performed to verify spills have been cleaned up. Spill cleanup and testing must be done at no additional cost to the Government.

3.6 DISPOSAL REQUIREMENTS

Offsite disposal of contaminated material must be in accordance with South Dakota Department of Agriculture and Natural Resources Requirements.

3.7 CLOSURE REPORT

Submit a Closure Report within 14 calendar days of completing work at the site. The report must 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 must include the following information as a minimum:

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;

SECTION 02 61 13 Page 7

(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 certifications of final disposal signed by the responsible disposal facility official.

e. Waste profile sheets.

f. Progress Photographs. Color photographs must be used to document progress of the work. A digital version of all photos shown in the report must be included with the Closure Report.

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