Amendment 0005 02 61 13 - EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL.pdf

DDG(X) LBTS WP3: E-Campus 1733372

SECTION 02 61 13

EXCAVATION AND HANDLING OF CONTAMINATED MATERIAL

02/10, CHG 1: 02/21

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

U.S. ARMY CORPS OF ENGINEERS (USACE)

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

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

29 CFR 1926 Safety and Health Regulations for Construction

1.2 BASIS FOR BIDS AND PAYMENT

1.2.1 Lump Sum Price for Contaminated Water

For contaminated water, payment will be at the contract unit price per gallon multiplied by the total gallon of oily water disposed offsite. The unit pricing shall include handling, dewatering, temporary storing, sampling, testing, permitting and disposing of oily water.

1.2.2 Measurement for Contaminated Water

Discharge water will be required to be measured during dewatering activity to determine the volume of liquid treated. This information will be used to determine the volume of liquid disposed and it will be used as the basis for payment.

1.2.3 Unit Price Contaminated Material

Payment will be at the contract unit price per ton multiplied by the total tonnage of material disposed offsite. The unit pricing shall include handling, excavating, temporary storing and stockpiling, sampling, testing, permitting and disposing of contaminated soil media.

1.2.4 Measurement Contaminated Material

Dump trucks will be required to be weighed at a weigh station (once fully loaded with material and once empty) to determine the weight of material being disposed. Submit dump truck weight tickets. This information will be used to determine the weight of material disposed and it will be used

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9 July 2025 as the basis for payment.

1.3 DESCRIPTION OF WORK

The work consists of excavation and temporary storage of contaminated soil if found on site.

The work also consists of installation of treatment system for dewatering contaminated groundwater

In addition, liquid collected from ground water inside utility manholes, vaults, or excavations shall be sampled and tested in accordance with federal, state, and local agency regulations. Obtain permit from PWD before discharging the liquid into the City sewer system.

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. Required sampling and chemical analysis for contaminated soil shall be conducted in accordance with this Section.

1.3.1 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.

1.3.2 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 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.

1.3.3 Other Submittal Requirements

Submit separate cross-sections of each area before and after excavation and after backfilling, test results, and the Closure Report within 14

SECTION 02 61 13 Page 2 calendar days of work completion at the site.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" 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-06 Test Reports

Closure Report; G

1.5 REGULATORY REQUIREMENTS

1.5.1 Permits and Licenses

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

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

Refer to Section 31 00 00 EARTHWORK for requirements.

PART 3 EXECUTION

3.1 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.

3.2 CONTAMINATED MATERIAL REMOVAL

3.2.1 Excavation

Areas shall be excavated 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. Excavation shall be performed

SECTION 02 61 13 Page 3 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.

3.2.2 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.

3.2.3 Dewatering

Mercury contaminated groundwater is known to be present at the site.

Treatment of dewatered groundwater is required. 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.

3.3 SAMPLING

3.3.1 Sampling of Stored Material

Submit test reports for sampling of stored material.

3.3.2 Sampling Liquid

Influent and effluent groundwater to the treatment system shall be tested regularly to confirm contaminants are not being discharged.

Liquid collected from excavations shall be sampled for heavy metals, oil, PH and shall meet the Philadelphia Water Department (PWD) Regulation for discharge into the City's sanitary sewer. Obtain permit from PWD before discharge.

3.4 BACKFILLING

See Section 31 00 00 EARTHWORK.

3.5 DISPOSAL REQUIREMENTS

Offsite disposal of contaminated material shall be in accordance with Federal, State, and local agency regulation. Contaminated soil shall be transported by a licensed hauler and disposed at a licensed disposal site.

3.6 CLOSURE REPORT

Submit 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. The Closure Report shall 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:

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(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.

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.

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 3 by 5 inches 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

SECTION 02 61 13 Page 5 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.

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