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    SECTION 02112

    HAZARDOUS SUBSTANCES

    HANDLING AND DISPOSAL

   PART 1 - GENERAL

   1.01 SECTION INCLUDES

    A. Excavation, testing, removal and disposal of hazardous substances or special wastes.

    B. Obtaining and paying for all permits required.

    C. Hiring of qualified environmental professional consultant(s). Contractor will be required to hire a qualified professional environmental consultant(s) in order to direct Contractor on health, environmental, safety, etc., issues relative to the Contractor's operations within area(s) containing hazardous substances.

    D. Hiring of testing laboratory to perform the tests recommended by the Contractor's professional environmental consultant.

    E. Formulation of a site Health And Safety Plan for excavation, testing, removal, and disposal of hazardous substances.

   1.02 REFERENCES

    A. All applicable OSHA and MSHA Regulatory Requirements

    B. All applicable Environmental Protection Agency (EPA) Regulatory Requirements.

    C. All applicable Tennessee Department of Environment and Conservation (TDEC) Regulatory Requirements.

    D. All applicable Metropolitan Government of Nashville and Davidson County Regulatory Requirements.

    E. All applicable NIOSH standards.

   1.03 SUBMITTALS

    A. The Contractor shall prepare and submit to the Engineer plans for handling hazardous substances not less than 30 days prior to commencing excavation. Contractor shall not commence work until the Contractor's submittal for dealing with hazardous substances is reviewed and approved by the Engineer and the TDEC. The Contractor's plan shall specifically detail (1) any operations involving discharges into storm and/or sanitary sewers and (2) the testing, excavation, handling, transporting, and disposal of hazardous substances.

    B. Contractor shall submit the name of his proposed qualified environmental professional consultant(s) and testing lab to the Engineer.

    C. The Contractor's Plan shall include the detailed sequence of construction including proposed excavation and handling methods, proposed carriers for hazardous substances, disposal site, and a list of any permits that may be required for hazardous substances handling or disposal. The above data must be compiled and arranged in a format that is acceptable to the TDEC for their review.

    D. Contractor shall document and submit levels of contamination and actual limits of excavation as prepared by his qualified environmental professional consultant(s) and testing lab.

    E. Contractor shall submit for review and approval the proposed carrier pipe material and manhole material to be used within the actual limits of hazardous substance excavations, including pipe and manhole gaskets and carrier pipe liner.

    F. The Engineer will base the review of the submitted work plan and proposed procedures upon: (1) the requirements of the completed work, (2) safety of the work in regards to the public, (3) potential for damage to public or private utilities, (4) other existing structures and facilities, and (5) the potential for unnecessary delay in the execution of the work. Such review shall not be construed to relieve the Contractor in any way of his contractual responsibilities.

   PART 2 - PRODUCTS

   2.01 PIPE AND MANHOLE GASKET MATERIAL

    Materials used within the actual limits of hazardous substance excavation, including pipe and manhole gaskets, shall be resistant to petroleum hydrocarbon and chemical deterioration. All materials submitted for approval in contaminated areas shall have a life expectancy equivalent to non-contaminated areas of the pipeline.

   PART 3 - EXECUTION

   3.01 POTENTIALLY CONTAMINATED AREAS

    A. The potential exists to encounter soils and groundwater that have been contaminated with hazardous substances. The Contractor shall follow the procedures in this section when excavating.

    B. Actual limits of hazardous substance excavation are to be determined by the Engineer based on test results submitted by the Contractor's qualified environmental consultant(s) and testing lab.

   3.02 SCREENING POTENTIALLY HAZARDOUS SUBSTANCE

    CONTAMINATED AREAS

    A. Care is to be taken during all excavation and dewatering activities to identify areas potentially contaminated.

    B. When odors are encountered during excavation or when there is visual evidence of potentially hazardous substances, the Contractor shall notify the Engineer without delay.

    C. The Contractor shall have retained the services of an environmental/analytical testing laboratory who shall be present at the site to field screen hazardous substances.

    D. Water that has an oily sheen encountered during excavation or dewatering shall be considered potentially contaminated with petroleum. The Contractor shall immediately notify the Engineer and the TDEC whenever contaminated water is encountered.

    E. When the Engineer determines that contaminated material exists in the area of the proposed work, the Contractor shall proceed to handle the material as herein prescribed and under the observation of the Engineer.

   3.03 HANDLING HAZARDOUS SUBSTANCES

    A. Soils and water that are to be removed in the construction of this project that have been determined by the Engineer to be hazardous shall be removed and transported in accordance with TDEC and EPA requirements and hauled to an approved waste disposal site. The Contractor is responsible for proper manifesting of the materials from the site to the waste disposal facility.

    B. Water pumped from the excavation or from dewatering activities that has an oily sheen shall be considered potentially contaminated.

    C. In order to maintain safe working conditions, worker exposure to vapor concentrations shall not exceed the time weight averages or permissible exposure limits established by OSHA and NIOSH, whichever is lower. Concentrations of explosive or flammable vapors and gases shall not exceed the limits established by OSHA.

    D. To monitor vapor levels and oxygen levels a combustible gas indicator (CGI) and oxygen (02) meter shall continuously operate in the working area. The CGI shall be properly calibrated and shall have an alarm that sounds. Power to tunnelling equipment shall be deactivated if 10 percent of the LEL is reached. Monitoring data from the CGI should be recorded every 15 minutes to ensure that ventilation or other methods are effective. In the event local health and safety agencies require more stringent monitoring, the local regulations shall be implemented.

   3.04 DISPOSAL OF EXCESS MATERIAL

    Excess or unsuitable materials from the excavation, which are not classified as hazardous substances, shall be disposed of off the job site in accordance with Section 02211.

    END OF SECTION