Removal of a single compartmentalized (10,000-gallon compartmentalized Unleaded and 4,000-gallon Super Unleaded and a 4,000-gallon Diesel Underground Storage Tank), all associated product line pipes, vapor vent pipes, and gas dispensers and soil sampling. 1. Provide notification to and obtain and coordination with Navajo Nation Environmental Protection Agency Leaking Storage Tank Program before beginning work at site. 2. Create a Site-Specific Health and Safety Plan for each site including copies of current HAZWOPER certificates for all employees and subcontractors on site during UST tank removal. 3. Contact Navajo Tribal Utility Authority (NTUA) for all underground utilities and structures on site before tank removal. 4. Contact Navajo Nation Department of Water Resources (NNDWR) for Water Use Application form and the Well Drilling Permit application forms. Completed permit application forms and applicable fee payments and submitted to NNDWR. 5. Remove underground storage tank, liquid, and including Petroleum contaminated soil (PCS) removal. a. Remove any liquids from the USTs for disposal prior to removal. b. Inert the USTs prior to removal (Dry Ice and inerting gas). c. Keep the vent pipes connected until the tank is fully purged or inerted of flammable vapors. d. The contractor must provide a calibrated combustible gas indicator (CGI) meter for monitoring verification of O2 less than 5% and LEL less than 10% before removing the USTs. e. Evaluate the conditions of the USTs for corrosion and holes. 6. Soil Disposal and Backfilled a. Excavated soil and clean soil should be segregated into two separate piles on site. b. Compact excavated pit area with clean soil to match adjacent (existing) surfaces. c. Certification of a clean backfill soil much be provided to NNEPA. 7. Removal of UST to a metal recycling facility to destroy USTs and Removal of PCS to state certified landfarming facility. Contaminated Soil Disposal to a State Certified landfarming facility. The PCS should be sampled for BTEX, PAHS, MTBE, and TPH gas and diesel. 8. Certification of Proper Disposal of the USTs and PCS. a. Documentation from the tank recycling facility showing receipt of the USTs must be provided to NNEPA within 30 days of the UST removal as well as the manifest to confirm proper disposal
